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China best Paper Industry Pulper Machine Double Disc Refiner Stainless Steel Materials with Hot selling

Product Description

Product Description

The double disc refiner is a continuous beating equipment for the paper pulping system. It has the characteristics of compact structure, small footprint, high efficiency, low power consumption, strong adaptability, simple operation, flexible adjustment, and convenient maintenance. It is the ideal continuous Beating equipment. According to the requirements of the beating process, single or multiple units can be used in series or parallel.

Advantage:
(1) Mainly used for beating pulp to improve the tapping degree of pulp and meet the needs of papermaking.
(2) A variety of tooth-shaped grinding discs can be installed, with a wide range of raw materials, suitable for wood pulp, chemical pulp, chemical pulp, waste paper pulp, etc.
(3) Double grinding zone, high refining efficiency.
(4) High versatility and convenient maintenance
 

Detailed Photos

 

Our Advantages

DD series double disc refiner is available for continuous beating section of paper industry. It is available for continuous beating of virgin pulp, chemical wood pulp, mechanical pulp and waste paper pulp.
*Specially designed rotary disc is self aligned automatically under the function of stock.

Advantage :
*According to refining requirement, clearance is adjustable through electromechanical device.

*Special tool for easy and fast change of refiner disc.

*High strength welded structure to ensure stable and reliable operation.
 

*The beating effect is stable and uniform.

Key Feature

1. Improve the beating degree and wet weigh of pulp. 
2.The equipment is furnished with automatic control system and can beat with constant power or constant energy consumption. 
3.The rotary disc and the main shaft are splined to ensure the pressure balance in the 2 grinding areas.
4.The beating effect is stable and uniform.

Product Parameters

Model ZDP-380 ZDP-400 ZDP-450 ZDP-550 ZDP-600 ZDP-660
Refiner plate dia (mm) 380 400 450 550 600 660
Capacity (T/D) 6-20 7-25 8-40 20-100 30-150 40-200
Inlet Consistency: (%) 2-5
Inlet pressure (Mpa) 0.1-0.3
Inlet pipe dia (mm) 2-65 2-65 2-70 2-90 2-110 2-130
Outlet pipe dia (mm) 80 80 90 100 120 150
Motor Power: (kW) 37 37 90 160-250 200-315 220-500
Main shaft speed 980 980 980 980 980 750

 

Structure and Principle

This refiner is made up of main body, coupling and feed gear, etc.

1.Main body

The refiner has 2 CZPT sections. By the inclination angle of abrasion pattern, 4 CZPT plates are fixed, 2 left and 2 right. Two left plates are fixed on inner wall of machine shell and inside of rotating disc and 2 right plates are fixed on outside of rotating disc and moving pedestal, forming 2 CZPT sections (see drawing for installation instruction). Stock is conveyed to CZPT section through inlet pipe. After beating and refining, pumped out from the CZPT section and flows into shell, at last discharged from outlet pipe.

There are 2 bearings on the main shaft and fixed by bearing pedestal and connected to motor via coupling by Nylon column pins. The turntable is on the other side of the main shaft. And there are CZPT discs on each end of the turntable, and the turntable rotates between 2 CZPT discs and axially moves under pressure.

Movable pedestal is adjusted by feed gear with axial movement to adjust the space between 2 CZPT sections. A feather key is set between movable pedestal and machine case and pushed by trapezoidal screw.

The cover is a welded structure which is connected with the case by pin roll. Withdraw the whole movable pedestal into the cover and loosen the locking bolts before opening the cover. Keep the surface clean and withdraw the movable pedestal into the cover before closing the cover. Then fix uniformly fasten bolts.

2.Coupling

Coupling is connected by Nylon column pin with the character of easy dismounting and maintenance. It meets the requirement of displacement of feeding and relieving and transmit torque

3.Feed gear

Feed gear covers worm gear reduction system. Under force of worm gear, trapezoidal thread screw rotates and drive the movable pedestal forward or backward. The movable pedestal moves 0.23mm for each circle of motor. When rotating clockwise, it moves forward while anticlockwise backward.

Field Usage

 

Company Profile

The Functions of Splined Shaft Bearings

Splined shafts are the most common types of bearings for machine tools. They are made of a wide variety of materials, including metals and non-metals such as Delrin and nylon. They are often fabricated to reduce deflection. The tooth profile will become deformed with time, as the shaft is used over a long period of time. Splined shafts are available in a huge range of materials and lengths.

Functions

Splined shafts are used in a variety of applications and industries. They are an effective anti-rotational device, as well as a reliable means of transmitting torque. Other types of shafts are available, including key shafts, but splines are the most convenient for transmitting torque. The following article discusses the functions of splines and why they are a superior choice. Listed below are a few examples of applications and industries in which splines are used.
Splined shafts can be of several styles, depending on the application and mechanical system in question. The differences between splined shaft styles include the design of teeth, overall strength, transfer of rotational concentricity, sliding ability, and misalignment tolerance. Listed below are a few examples of splines, as well as some of their benefits. The difference between these styles is not mutually exclusive; instead, each style has a distinct set of pros and cons.
A splined shaft is a cylindrical shaft with teeth or ridges that correspond to a specific angular position. This allows a shaft to transfer torque while maintaining angular correspondence between tracks. A splined shaft is defined as a cylindrical member with several grooves cut into its circumference. These grooves are equally spaced around the shaft and form a series of projecting keys. These features give the shaft a rounded appearance and allow it to fit perfectly into a grooved cylindrical member.
While the most common applications of splines are for shortening or extending shafts, they can also be used to secure mechanical assemblies. An “involute spline” spline has a groove that is wider than its counterparts. The result is that a splined shaft will resist separation during operation. They are an ideal choice for applications where deflection is an issue.
A spline shaft’s radial torsion load distribution is equally distributed, unless a bevel gear is used. The radial torsion load is evenly distributed and will not exert significant load concentration. If the spline couplings are not aligned correctly, the spline connection can fail quickly, causing significant fretting fatigue and wear. A couple of papers discuss this issue in more detail.
splineshaft

Types

There are many different types of splined shafts. Each type features an evenly spaced helix of grooves on its outer surface. These grooves are either parallel or involute. Their shape allows them to be paired with gears and interchange rotary and linear motion. Splines are often cold-rolled or cut. The latter has increased strength compared to cut spines. These types of shafts are commonly used in applications requiring high strength, accuracy, and smoothness.
Another difference between internal and external splined shafts lies in the manufacturing process. The former is made of wood, while the latter is made of steel or a metal alloy. The process of manufacturing splined shafts involves cutting furrows into the surface of the material. Both processes are expensive and require expert skill. The main advantage of splined shafts is their adaptability to a wide range of applications.
In general, splined shafts are used in machinery where the rotation is transferred to an internal splined member. This member can be a gear or some other rotary device. These types of shafts are often packaged together as a hub assembly. Cleaning and lubricating are essential to the life of these components. If you’re using them on a daily basis, you’ll want to make sure to regularly inspect them.
Crowned splines are usually involute. The teeth of these splines form a spiral pattern. They are used for smaller diameter shafts because they add strength. Involute splines are also used on instrument drives and valve shafts. Serration standards are found in the SAE. Both kinds of splines can also contain a ball bearing for high torque. The difference between the 2 types of splines is the number of teeth on the shaft.
Internal splines have many advantages over external ones. For example, an internal spline shaft can be made using a grinding wheel instead of a CNC machine. It also uses a more accurate and economical process. Furthermore, it allows for a shorter manufacturing cycle, which is essential when splining high-speed machines. In addition, it stabilizes the relative phase between the spline and thread.
splineshaft

Manufacturing methods

There are several methods used to fabricate a splined shaft. Key and splined shafts are constructed from 2 separate parts that are shaped in a synchronized manner to transfer torque uniformly. Hot rolling is 1 method, while cold rolling utilizes low temperatures to form metal. Both methods enhance mechanical properties, surface finishes, and precision. The advantage of cold rolling is its cost-effectiveness.
Cold forming is 1 method, as well as machining and assembling. Cold forming is a unique process that allows the spline to be shaped to the desired shape. The resulting shape provides maximum contact area and torsional strength. Standard splines are available in standard sizes, but custom lengths can also be ordered. CZPT offers various auxiliary equipment, such as mating sleeves and flanged bushings.
Cold forging is another method. This method produces long splined shafts that are used in automobile propellers. After the spline portion is cut out, it is worked on in a hobbing machine. Work hardening enhances the root strength of the splined portion. It can be used for bearings, gears, and other mechanical components. Listed below are the manufacturing methods for splined shafts.
Parallel splines are the simplest of the splined shaft manufacturing methods. Parallel splines are usually welded to shafts, while involute splines are made of metal or non-metals. Splines are available in a wide variety of lengths and materials. The process is usually accompanied by a process called milling. The workpiece rotates to produce the serrated surface.
Splines are internal or external grooves in a splined shaft. They work in combination with keyways to transfer torque. Male and female splines are used in gears. Female and male splines correspond to 1 another to ensure proper angular correspondence. Involute splines have more surface area and thus are stronger than external splines. Moreover, they help the shaft fit into a grooved cylindrical member without misalignment.
A variety of other methods of manufacturing a splined shaft can be used to produce a splined shaft. Spline shafts can be produced using broaching and shaping, 2 precision machining methods. Broaching uses a metal tool with successively larger teeth to remove metal and create ridges and holes in the surface of a material. However, this process is expensive and requires special expertise.
splineshaft

Applications

The splined shaft is a mechanical component with a helix-like shape formed by the equal spacing of grooves in a circular ring. The splines can either have parallel or involute sides. The splines minimize stress concentration in stationary joints and can be used in both rotary and linear motion. In some cases, splines are rolled rather than cut. The latter is more durable than cut splines and is often used in applications requiring high strength, accuracy, and smooth finish.
Splined shafts are commonly made of carbon steel. This alloy steel has a low carbon content, making it easy to work with. Carbon steel is a great choice for splines because it is malleable. Generally, high-quality carbon steel provides a consistent motion. Steel alloys are also available that contain nickel, chromium, copper, and other metals. If you’re unsure of the right material for your application, you can consult a spline chart.
Splines are a versatile mechanical component. They are easy to cut and fit. Splines can be internal or external, with teeth positioned at equal intervals on both sides of the shaft. This allows the shaft to engage with the hub around the entire circumference of the hub. It also increases load capacity by creating a constant multiple-tooth point of contact with the hub. For this reason, they’re used extensively in rotary and linear motion.
Splined shafts are used in a wide variety of industries. CZPT Inc. offers custom and standard splined shafts for a variety of applications. When choosing a splined shaft for a specific application, consider the surrounding mated components, torque requirements, and size requirements. These 3 factors will make it the ideal choice for your rotary equipment. And you’ll be pleased with the end result!
There are many types of splines and their applications are endless. They transfer torque and angular misalignment between parts, and they also enable the axial rotation of assembled components. Therefore, splines are an essential component of machinery and are used in a wide range of applications. This type of shaft can be found in various types of machines, from household appliances to industrial machinery. So, the next time you’re looking for a splined shaft, make sure you look for a splined one.

China best Paper Industry Pulper Machine Double Disc Refiner Stainless Steel Materials     with Hot sellingChina best Paper Industry Pulper Machine Double Disc Refiner Stainless Steel Materials     with Hot selling

China Standard Disc Grinder Used in Paper Mill/ Double Disc Refiner Pulp Machine Refiner wholesaler

Product Description

Product Description

Double Disc Refiner is a beating equipment, featuring compact conformation, less floor area, higher efficiency, lower energy consumption, well adaptability, friendly operation, flexible adjustment and easy maintenance. It is a relatively ideal continuous pulping system at present. As required by pulping process, paper factories may choose a single set or several sets for parallel operation or series operation.

Detailed Photos

 

Our Advantages

DD series double disc refiner is available for continuous beating section of paper industry. It is available for continuous beating of virgin pulp, chemical wood pulp, mechanical pulp and waste paper pulp.
*Specially designed rotary disc is self aligned automatically under the function of stock.

Advantage :
*According to refining requirement, clearance is adjustable through electromechanical device.

*Special tool for easy and fast change of refiner disc.

*High strength welded structure to ensure stable and reliable operation.
 

*The beating effect is stable and uniform.

Key Feature

1. Improve the beating degree and wet weigh of pulp. 
2.The equipment is furnished with automatic control system and can beat with constant power or constant energy consumption. 
3.The rotary disc and the main shaft are splined to ensure the pressure balance in the 2 grinding areas.
4.The beating effect is stable and uniform.

Product Parameters

Item Type DD-380 DD-450 DD-500 DD-550 DD-600 DD-660 DD-720 DD-900 DD-1100
Diameter of Plate Φ380 Φ450 Φ500 Φ550 Φ600 Φ660 Φ720 Φ900 Φ1100
Production(t/d) 6-20 8~80 10~100 10~120 12~150 15~200 15~250 20~400 40~800
Power 37 90~160 132~200 160~250 185~315 220~500 250~800 315~1000 400~1800
Consistency 3%~5%

Structure and Principle

This refiner is made up of main body, coupling and feed gear, etc.

1.Main body

The refiner has 2 CZPT sections. By the inclination angle of abrasion pattern, 4 CZPT plates are fixed, 2 left and 2 right. Two left plates are fixed on inner wall of machine shell and inside of rotating disc and 2 right plates are fixed on outside of rotating disc and moving pedestal, forming 2 CZPT sections (see drawing for installation instruction). Stock is conveyed to CZPT section through inlet pipe. After beating and refining, pumped out from the CZPT section and flows into shell, at last discharged from outlet pipe.

There are 2 bearings on the main shaft and fixed by bearing pedestal and connected to motor via coupling by Nylon column pins. The turntable is on the other side of the main shaft. And there are CZPT discs on each end of the turntable, and the turntable rotates between 2 CZPT discs and axially moves under pressure.

Movable pedestal is adjusted by feed gear with axial movement to adjust the space between 2 CZPT sections. A feather key is set between movable pedestal and machine case and pushed by trapezoidal screw.

The cover is a welded structure which is connected with the case by pin roll. Withdraw the whole movable pedestal into the cover and loosen the locking bolts before opening the cover. Keep the surface clean and withdraw the movable pedestal into the cover before closing the cover. Then fix uniformly fasten bolts.

2.Coupling

Coupling is connected by Nylon column pin with the character of easy dismounting and maintenance. It meets the requirement of displacement of feeding and relieving and transmit torque

3.Feed gear

Feed gear covers worm gear reduction system. Under force of worm gear, trapezoidal thread screw rotates and drive the movable pedestal forward or backward. The movable pedestal moves 0.23mm for each circle of motor. When rotating clockwise, it moves forward while anticlockwise backward.

Field Usage

 

Company Profile

The Benefits of Spline Couplings for Disc Brake Mounting Interfaces

Spline couplings are commonly used for securing disc brake mounting interfaces. Spline couplings are often used in high-performance vehicles, aeronautics, and many other applications. However, the mechanical benefits of splines are not immediately obvious. Listed below are the benefits of spline couplings. We’ll discuss what these advantages mean for you. Read on to discover how these couplings work.

Disc brake mounting interfaces are splined

There are 2 common disc brake mounting interfaces – splined and six-bolt. Splined rotors fit on splined hubs; six-bolt rotors will need an adapter to fit on six-bolt hubs. The six-bolt method is easier to maintain and may be preferred by many cyclists. If you’re thinking of installing a disc brake system, it is important to know how to choose the right splined and center lock interfaces.
splineshaft

Aerospace applications

The splines used for spline coupling in aircraft are highly complex. While some previous researches have addressed the design of splines, few publications have tackled the problem of misaligned spline coupling. Nevertheless, the accurate results we obtained were obtained using dedicated simulation tools, which are not commercially available. Nevertheless, such tools can provide a useful reference for our approach. It would be beneficial if designers could use simple tools for evaluating contact pressure peaks. Our analytical approach makes it possible to find answers to such questions.
The design of a spline coupling for aerospace applications must be accurate to minimize weight and prevent failure mechanisms. In addition to weight reduction, it is necessary to minimize fretting fatigue. The pressure distribution on the spline coupling teeth is a significant factor in determining its fretting fatigue. Therefore, we use analytical and experimental methods to examine the contact pressure distribution in the axial direction of spline couplings.
The teeth of a spline coupling can be categorized by the type of engagement they provide. This study investigates the position of resultant contact forces in the teeth of a spline coupling when applied to pitch diameter. Using FEM models, numerical results are generated for nominal and parallel offset misalignments. The axial tooth profile determines the behavior of the coupling component and its ability to resist wear. Angular misalignment is also a concern, causing misalignment.
In order to assess wear damage of a spline coupling, we must take into consideration the impact of fretting on the components. This wear is caused by relative motion between the teeth that engage them. The misalignment may be caused by vibrations, cyclical tooth deflection, or angular misalignment. The result of this analysis may help designers improve their spline coupling designs and develop improved performance.
CZPT polyimide, an abrasion-resistant polymer, is a popular choice for high-temperature spline couplings. This material reduces friction and wear, provides a low friction surface, and has a low wear rate. Furthermore, it offers up to 50 times the life of metal on metal spline connections. For these reasons, it is important to choose the right material for your spline coupling.
splineshaft

High-performance vehicles

A spline coupler is a device used to connect splined shafts. A typical spline coupler resembles a short pipe with splines on either end. There are 2 basic types of spline coupling: single and dual spline. One type attaches to a drive shaft, while the other attaches to the gearbox. While spline couplings are typically used in racing, they’re also used for performance problems.
The key challenge in spline couplings is to determine the optimal dimension of spline joints. This is difficult because no commercial codes allow the simulation of misaligned joints, which can destroy components. This article presents analytical approaches to estimating contact pressures in spline connections. The results are comparable with numerical approaches but require special codes to accurately model the coupling operation. This research highlights several important issues and aims to make the application of spline couplings in high-performance vehicles easier.
The stiffness of spline assemblies can be calculated using tooth-like structures. Such splines can be incorporated into the spline joint to produce global stiffness for torsional vibration analysis. Bearing reactions are calculated for a certain level of misalignment. This information can be used to design bearing dimensions and correct misalignment. There are 3 types of spline couplings.
Major diameter fit splines are made with tightly controlled outside diameters. This close fit provides concentricity transfer from the male to the female spline. The teeth of the male spline usually have chamfered tips and clearance with fillet radii. These splines are often manufactured from billet steel or aluminum. These materials are renowned for their strength and uniform grain created by the forging process. ANSI and DIN design manuals define classes of fit.
splineshaft

Disc brake mounting interfaces

A spline coupling for disc brake mounting interfaces is a type of hub-to-brake-disc mount. It is a highly durable coupling mechanism that reduces heat transfer from the disc to the axle hub. The mounting arrangement also isolates the axle hub from direct contact with the disc. It is also designed to minimize the amount of vehicle downtime and maintenance required to maintain proper alignment.
Disc brakes typically have substantial metal-to-metal contact with axle hub splines. The discs are held in place on the hub by intermediate inserts. This metal-to-metal contact also aids in the transfer of brake heat from the brake disc to the axle hub. Spline coupling for disc brake mounting interfaces comprises a mounting ring that is either a threaded or non-threaded spline.
During drag brake experiments, perforated friction blocks filled with various additive materials are introduced. The materials included include Cu-based powder metallurgy material, a composite material, and a Mn-Cu damping alloy. The filling material affects the braking interface’s wear behavior and friction-induced vibration characteristics. Different filling materials produce different types of wear debris and have different wear evolutions. They also differ in their surface morphology.
Disc brake couplings are usually made of 2 different types. The plain and HD versions are interchangeable. The plain version is the simplest to install, while the HD version has multiple components. The two-piece couplings are often installed at the same time, but with different mounting interfaces. You should make sure to purchase the appropriate coupling for your vehicle. These interfaces are a vital component of your vehicle and must be installed correctly for proper operation.
Disc brakes use disc-to-hub elements that help locate the forces and displace them to the rim. These elements are typically made of stainless steel, which increases the cost of manufacturing the disc brake mounting interface. Despite their benefits, however, the high braking force loads they endure are hard on the materials. Moreover, excessive heat transferred to the intermediate elements can adversely affect the fatigue life and long-term strength of the brake system.

China Standard Disc Grinder Used in Paper Mill/ Double Disc Refiner Pulp Machine Refiner     wholesaler China Standard Disc Grinder Used in Paper Mill/ Double Disc Refiner Pulp Machine Refiner     wholesaler

China Standard 380mm-1100mm Paper Machine Pulping Line Double Disc Refiner with high quality

Product Description

Product Description

Double Disc Refiner is a beating equipment, featuring compact conformation, less floor area, higher efficiency, lower energy consumption, well adaptability, friendly operation, flexible adjustment and easy maintenance. It is a relatively ideal continuous pulping system at present. As required by pulping process, paper factories may choose a single set or several sets for parallel operation or series operation.

Detailed Photos

 

Our Advantages

DD series double disc refiner is available for continuous beating section of paper industry. It is available for continuous beating of virgin pulp, chemical wood pulp, mechanical pulp and waste paper pulp.
*Specially designed rotary disc is self aligned automatically under the function of stock.

Advantage :
*According to refining requirement, clearance is adjustable through electromechanical device.

*Special tool for easy and fast change of refiner disc.

*High strength welded structure to ensure stable and reliable operation.
 

*The beating effect is stable and uniform.

Key Feature

1. Improve the beating degree and wet weigh of pulp. 
2.The equipment is furnished with automatic control system and can beat with constant power or constant energy consumption. 
3.The rotary disc and the main shaft are splined to ensure the pressure balance in the 2 grinding areas.
4.The beating effect is stable and uniform.

Product Parameters

Item Type DD-380 DD-450 DD-500 DD-550 DD-600 DD-660 DD-720 DD-900 DD-1100
Diameter of Plate Φ380 Φ450 Φ500 Φ550 Φ600 Φ660 Φ720 Φ900 Φ1100
Production(t/d) 6-20 8~80 10~100 10~120 12~150 15~200 15~250 20~400 40~800
Power 37 90~160 132~200 160~250 185~315 220~500 250~800 315~1000 400~1800
Consistency 3%~5%

Structure and Principle

This refiner is made up of main body, coupling and feed gear, etc.

1.Main body

The refiner has 2 CZPT sections. By the inclination angle of abrasion pattern, 4 CZPT plates are fixed, 2 left and 2 right. Two left plates are fixed on inner wall of machine shell and inside of rotating disc and 2 right plates are fixed on outside of rotating disc and moving pedestal, forming 2 CZPT sections (see drawing for installation instruction). Stock is conveyed to CZPT section through inlet pipe. After beating and refining, pumped out from the CZPT section and flows into shell, at last discharged from outlet pipe.

There are 2 bearings on the main shaft and fixed by bearing pedestal and connected to motor via coupling by Nylon column pins. The turntable is on the other side of the main shaft. And there are CZPT discs on each end of the turntable, and the turntable rotates between 2 CZPT discs and axially moves under pressure.

Movable pedestal is adjusted by feed gear with axial movement to adjust the space between 2 CZPT sections. A feather key is set between movable pedestal and machine case and pushed by trapezoidal screw.

The cover is a welded structure which is connected with the case by pin roll. Withdraw the whole movable pedestal into the cover and loosen the locking bolts before opening the cover. Keep the surface clean and withdraw the movable pedestal into the cover before closing the cover. Then fix uniformly fasten bolts.

2.Coupling

Coupling is connected by Nylon column pin with the character of easy dismounting and maintenance. It meets the requirement of displacement of feeding and relieving and transmit torque

3.Feed gear

Feed gear covers worm gear reduction system. Under force of worm gear, trapezoidal thread screw rotates and drive the movable pedestal forward or backward. The movable pedestal moves 0.23mm for each circle of motor. When rotating clockwise, it moves forward while anticlockwise backward.

Field Usage

 

Company Profile

How to Calculate Stiffness, Centering Force, Wear and Fatigue Failure of Spline Couplings

There are various types of spline couplings. These couplings have several important properties. These properties are: Stiffness, Involute splines, Misalignment, Wear and fatigue failure. To understand how these characteristics relate to spline couplings, read this article. It will give you the necessary knowledge to determine which type of coupling best suits your needs. Keeping in mind that spline couplings are usually spherical in shape, they are made of steel.
splineshaft

Involute splines

An effective side interference condition minimizes gear misalignment. When 2 splines are coupled with no spline misalignment, the maximum tensile root stress shifts to the left by 5 mm. A linear lead variation, which results from multiple connections along the length of the spline contact, increases the effective clearance or interference by a given percentage. This type of misalignment is undesirable for coupling high-speed equipment.
Involute splines are often used in gearboxes. These splines transmit high torque, and are better able to distribute load among multiple teeth throughout the coupling circumference. The involute profile and lead errors are related to the spacing between spline teeth and keyways. For coupling applications, industry practices use splines with 25 to 50-percent of spline teeth engaged. This load distribution is more uniform than that of conventional single-key couplings.
To determine the optimal tooth engagement for an involved spline coupling, Xiangzhen Xue and colleagues used a computer model to simulate the stress applied to the splines. The results from this study showed that a “permissible” Ruiz parameter should be used in coupling. By predicting the amount of wear and tear on a crowned spline, the researchers could accurately predict how much damage the components will sustain during the coupling process.
There are several ways to determine the optimal pressure angle for an involute spline. Involute splines are commonly measured using a pressure angle of 30 degrees. Similar to gears, involute splines are typically tested through a measurement over pins. This involves inserting specific-sized wires between gear teeth and measuring the distance between them. This method can tell whether the gear has a proper tooth profile.
The spline system shown in Figure 1 illustrates a vibration model. This simulation allows the user to understand how involute splines are used in coupling. The vibration model shows 4 concentrated mass blocks that represent the prime mover, the internal spline, and the load. It is important to note that the meshing deformation function represents the forces acting on these 3 components.
splineshaft

Stiffness of coupling

The calculation of stiffness of a spline coupling involves the measurement of its tooth engagement. In the following, we analyze the stiffness of a spline coupling with various types of teeth using 2 different methods. Direct inversion and blockwise inversion both reduce CPU time for stiffness calculation. However, they require evaluation submatrices. Here, we discuss the differences between these 2 methods.
The analytical model for spline couplings is derived in the second section. In the third section, the calculation process is explained in detail. We then validate this model against the FE method. Finally, we discuss the influence of stiffness nonlinearity on the rotor dynamics. Finally, we discuss the advantages and disadvantages of each method. We present a simple yet effective method for estimating the lateral stiffness of spline couplings.
The numerical calculation of the spline coupling is based on the semi-analytical spline load distribution model. This method involves refined contact grids and updating the compliance matrix at each iteration. Hence, it consumes significant computational time. Further, it is difficult to apply this method to the dynamic analysis of a rotor. This method has its own limitations and should be used only when the spline coupling is fully investigated.
The meshing force is the force generated by a misaligned spline coupling. It is related to the spline thickness and the transmitting torque of the rotor. The meshing force is also related to the dynamic vibration displacement. The result obtained from the meshing force analysis is given in Figures 7, 8, and 9.
The analysis presented in this paper aims to investigate the stiffness of spline couplings with a misaligned spline. Although the results of previous studies were accurate, some issues remained. For example, the misalignment of the spline may cause contact damages. The aim of this article is to investigate the problems associated with misaligned spline couplings and propose an analytical approach for estimating the contact pressure in a spline connection. We also compare our results to those obtained by pure numerical approaches.

Misalignment

To determine the centering force, the effective pressure angle must be known. Using the effective pressure angle, the centering force is calculated based on the maximum axial and radial loads and updated Dudley misalignment factors. The centering force is the maximum axial force that can be transmitted by friction. Several published misalignment factors are also included in the calculation. A new method is presented in this paper that considers the cam effect in the normal force.
In this new method, the stiffness along the spline joint can be integrated to obtain a global stiffness that is applicable to torsional vibration analysis. The stiffness of bearings can also be calculated at given levels of misalignment, allowing for accurate estimation of bearing dimensions. It is advisable to check the stiffness of bearings at all times to ensure that they are properly sized and aligned.
A misalignment in a spline coupling can result in wear or even failure. This is caused by an incorrectly aligned pitch profile. This problem is often overlooked, as the teeth are in contact throughout the involute profile. This causes the load to not be evenly distributed along the contact line. Consequently, it is important to consider the effect of misalignment on the contact force on the teeth of the spline coupling.
The centre of the male spline in Figure 2 is superposed on the female spline. The alignment meshing distances are also identical. Hence, the meshing force curves will change according to the dynamic vibration displacement. It is necessary to know the parameters of a spline coupling before implementing it. In this paper, the model for misalignment is presented for spline couplings and the related parameters.
Using a self-made spline coupling test rig, the effects of misalignment on a spline coupling are studied. In contrast to the typical spline coupling, misalignment in a spline coupling causes fretting wear at a specific position on the tooth surface. This is a leading cause of failure in these types of couplings.
splineshaft

Wear and fatigue failure

The failure of a spline coupling due to wear and fatigue is determined by the first occurrence of tooth wear and shaft misalignment. Standard design methods do not account for wear damage and assess the fatigue life with big approximations. Experimental investigations have been conducted to assess wear and fatigue damage in spline couplings. The tests were conducted on a dedicated test rig and special device connected to a standard fatigue machine. The working parameters such as torque, misalignment angle, and axial distance have been varied in order to measure fatigue damage. Over dimensioning has also been assessed.
During fatigue and wear, mechanical sliding takes place between the external and internal splines and results in catastrophic failure. The lack of literature on the wear and fatigue of spline couplings in aero-engines may be due to the lack of data on the coupling’s application. Wear and fatigue failure in splines depends on a number of factors, including the material pair, geometry, and lubrication conditions.
The analysis of spline couplings shows that over-dimensioning is common and leads to different damages in the system. Some of the major damages are wear, fretting, corrosion, and teeth fatigue. Noise problems have also been observed in industrial settings. However, it is difficult to evaluate the contact behavior of spline couplings, and numerical simulations are often hampered by the use of specific codes and the boundary element method.
The failure of a spline gear coupling was caused by fatigue, and the fracture initiated at the bottom corner radius of the keyway. The keyway and splines had been overloaded beyond their yield strength, and significant yielding was observed in the spline gear teeth. A fracture ring of non-standard alloy steel exhibited a sharp corner radius, which was a significant stress raiser.
Several components were studied to determine their life span. These components include the spline shaft, the sealing bolt, and the graphite ring. Each of these components has its own set of design parameters. However, there are similarities in the distributions of these components. Wear and fatigue failure of spline couplings can be attributed to a combination of the 3 factors. A failure mode is often defined as a non-linear distribution of stresses and strains.

China Standard 380mm-1100mm Paper Machine Pulping Line Double Disc Refiner     with high qualityChina Standard 380mm-1100mm Paper Machine Pulping Line Double Disc Refiner     with high quality

China Best Sales Double Disc Refiner Machine Pulp Process Equipment for Paper Mill with Best Sales

Product Description

Product Description

Double Disc Refiner is a beating equipment, featuring compact conformation, less floor area, higher efficiency, lower energy consumption, well adaptability, friendly operation, flexible adjustment and easy maintenance. It is a relatively ideal continuous pulping system at present. As required by pulping process, paper factories may choose a single set or several sets for parallel operation or series operation.

Detailed Photos

 

Our Advantages

DD series double disc refiner is available for continuous beating section of paper industry. It is available for continuous beating of virgin pulp, chemical wood pulp, mechanical pulp and waste paper pulp.
*Specially designed rotary disc is self aligned automatically under the function of stock.

Advantage :
*According to refining requirement, clearance is adjustable through electromechanical device.

*Special tool for easy and fast change of refiner disc.

*High strength welded structure to ensure stable and reliable operation.
 

*The beating effect is stable and uniform.

Key Feature

1. Improve the beating degree and wet weigh of pulp. 
2.The equipment is furnished with automatic control system and can beat with constant power or constant energy consumption. 
3.The rotary disc and the main shaft are splined to ensure the pressure balance in the 2 grinding areas.
4.The beating effect is stable and uniform.

Product Parameters

Item Type DD-380 DD-450 DD-500 DD-550 DD-600 DD-660 DD-720 DD-900 DD-1100
Diameter of Plate Φ380 Φ450 Φ500 Φ550 Φ600 Φ660 Φ720 Φ900 Φ1100
Production(t/d) 6-20 8~80 10~100 10~120 12~150 15~200 15~250 20~400 40~800
Power 37 90~160 132~200 160~250 185~315 220~500 250~800 315~1000 400~1800
Consistency 3%~5%

Structure and Principle

This refiner is made up of main body, coupling and feed gear, etc.

1.Main body

The refiner has 2 CZPT sections. By the inclination angle of abrasion pattern, 4 CZPT plates are fixed, 2 left and 2 right. Two left plates are fixed on inner wall of machine shell and inside of rotating disc and 2 right plates are fixed on outside of rotating disc and moving pedestal, forming 2 CZPT sections (see drawing for installation instruction). Stock is conveyed to CZPT section through inlet pipe. After beating and refining, pumped out from the CZPT section and flows into shell, at last discharged from outlet pipe.

There are 2 bearings on the main shaft and fixed by bearing pedestal and connected to motor via coupling by Nylon column pins. The turntable is on the other side of the main shaft. And there are CZPT discs on each end of the turntable, and the turntable rotates between 2 CZPT discs and axially moves under pressure.

Movable pedestal is adjusted by feed gear with axial movement to adjust the space between 2 CZPT sections. A feather key is set between movable pedestal and machine case and pushed by trapezoidal screw.

The cover is a welded structure which is connected with the case by pin roll. Withdraw the whole movable pedestal into the cover and loosen the locking bolts before opening the cover. Keep the surface clean and withdraw the movable pedestal into the cover before closing the cover. Then fix uniformly fasten bolts.

2.Coupling

Coupling is connected by Nylon column pin with the character of easy dismounting and maintenance. It meets the requirement of displacement of feeding and relieving and transmit torque

3.Feed gear

Feed gear covers worm gear reduction system. Under force of worm gear, trapezoidal thread screw rotates and drive the movable pedestal forward or backward. The movable pedestal moves 0.23mm for each circle of motor. When rotating clockwise, it moves forward while anticlockwise backward.

Field Usage

 

Company Profile

The Benefits of Spline Couplings for Disc Brake Mounting Interfaces

Spline couplings are commonly used for securing disc brake mounting interfaces. Spline couplings are often used in high-performance vehicles, aeronautics, and many other applications. However, the mechanical benefits of splines are not immediately obvious. Listed below are the benefits of spline couplings. We’ll discuss what these advantages mean for you. Read on to discover how these couplings work.

Disc brake mounting interfaces are splined

There are 2 common disc brake mounting interfaces – splined and six-bolt. Splined rotors fit on splined hubs; six-bolt rotors will need an adapter to fit on six-bolt hubs. The six-bolt method is easier to maintain and may be preferred by many cyclists. If you’re thinking of installing a disc brake system, it is important to know how to choose the right splined and center lock interfaces.
splineshaft

Aerospace applications

The splines used for spline coupling in aircraft are highly complex. While some previous researches have addressed the design of splines, few publications have tackled the problem of misaligned spline coupling. Nevertheless, the accurate results we obtained were obtained using dedicated simulation tools, which are not commercially available. Nevertheless, such tools can provide a useful reference for our approach. It would be beneficial if designers could use simple tools for evaluating contact pressure peaks. Our analytical approach makes it possible to find answers to such questions.
The design of a spline coupling for aerospace applications must be accurate to minimize weight and prevent failure mechanisms. In addition to weight reduction, it is necessary to minimize fretting fatigue. The pressure distribution on the spline coupling teeth is a significant factor in determining its fretting fatigue. Therefore, we use analytical and experimental methods to examine the contact pressure distribution in the axial direction of spline couplings.
The teeth of a spline coupling can be categorized by the type of engagement they provide. This study investigates the position of resultant contact forces in the teeth of a spline coupling when applied to pitch diameter. Using FEM models, numerical results are generated for nominal and parallel offset misalignments. The axial tooth profile determines the behavior of the coupling component and its ability to resist wear. Angular misalignment is also a concern, causing misalignment.
In order to assess wear damage of a spline coupling, we must take into consideration the impact of fretting on the components. This wear is caused by relative motion between the teeth that engage them. The misalignment may be caused by vibrations, cyclical tooth deflection, or angular misalignment. The result of this analysis may help designers improve their spline coupling designs and develop improved performance.
CZPT polyimide, an abrasion-resistant polymer, is a popular choice for high-temperature spline couplings. This material reduces friction and wear, provides a low friction surface, and has a low wear rate. Furthermore, it offers up to 50 times the life of metal on metal spline connections. For these reasons, it is important to choose the right material for your spline coupling.
splineshaft

High-performance vehicles

A spline coupler is a device used to connect splined shafts. A typical spline coupler resembles a short pipe with splines on either end. There are 2 basic types of spline coupling: single and dual spline. One type attaches to a drive shaft, while the other attaches to the gearbox. While spline couplings are typically used in racing, they’re also used for performance problems.
The key challenge in spline couplings is to determine the optimal dimension of spline joints. This is difficult because no commercial codes allow the simulation of misaligned joints, which can destroy components. This article presents analytical approaches to estimating contact pressures in spline connections. The results are comparable with numerical approaches but require special codes to accurately model the coupling operation. This research highlights several important issues and aims to make the application of spline couplings in high-performance vehicles easier.
The stiffness of spline assemblies can be calculated using tooth-like structures. Such splines can be incorporated into the spline joint to produce global stiffness for torsional vibration analysis. Bearing reactions are calculated for a certain level of misalignment. This information can be used to design bearing dimensions and correct misalignment. There are 3 types of spline couplings.
Major diameter fit splines are made with tightly controlled outside diameters. This close fit provides concentricity transfer from the male to the female spline. The teeth of the male spline usually have chamfered tips and clearance with fillet radii. These splines are often manufactured from billet steel or aluminum. These materials are renowned for their strength and uniform grain created by the forging process. ANSI and DIN design manuals define classes of fit.
splineshaft

Disc brake mounting interfaces

A spline coupling for disc brake mounting interfaces is a type of hub-to-brake-disc mount. It is a highly durable coupling mechanism that reduces heat transfer from the disc to the axle hub. The mounting arrangement also isolates the axle hub from direct contact with the disc. It is also designed to minimize the amount of vehicle downtime and maintenance required to maintain proper alignment.
Disc brakes typically have substantial metal-to-metal contact with axle hub splines. The discs are held in place on the hub by intermediate inserts. This metal-to-metal contact also aids in the transfer of brake heat from the brake disc to the axle hub. Spline coupling for disc brake mounting interfaces comprises a mounting ring that is either a threaded or non-threaded spline.
During drag brake experiments, perforated friction blocks filled with various additive materials are introduced. The materials included include Cu-based powder metallurgy material, a composite material, and a Mn-Cu damping alloy. The filling material affects the braking interface’s wear behavior and friction-induced vibration characteristics. Different filling materials produce different types of wear debris and have different wear evolutions. They also differ in their surface morphology.
Disc brake couplings are usually made of 2 different types. The plain and HD versions are interchangeable. The plain version is the simplest to install, while the HD version has multiple components. The two-piece couplings are often installed at the same time, but with different mounting interfaces. You should make sure to purchase the appropriate coupling for your vehicle. These interfaces are a vital component of your vehicle and must be installed correctly for proper operation.
Disc brakes use disc-to-hub elements that help locate the forces and displace them to the rim. These elements are typically made of stainless steel, which increases the cost of manufacturing the disc brake mounting interface. Despite their benefits, however, the high braking force loads they endure are hard on the materials. Moreover, excessive heat transferred to the intermediate elements can adversely affect the fatigue life and long-term strength of the brake system.

China Best Sales Double Disc Refiner Machine Pulp Process Equipment for Paper Mill     with Best SalesChina Best Sales Double Disc Refiner Machine Pulp Process Equipment for Paper Mill     with Best Sales