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

제품 설명

제품 설명

더블 디스크 리파이너는 컴팩트한 구조, 적은 설치 공간, 높은 효율, 낮은 에너지 소비, 우수한 적응성, 편리한 조작, 유연한 조정 및 손쉬운 유지보수 등의 특징을 갖춘 타격 장비입니다. 현재로서는 비교적 이상적인 연속 펄프 제조 시스템입니다. 제지 공장은 펄프 제조 공정에 따라 단일 세트 또는 여러 세트를 병렬 또는 직렬로 운전할 수 있습니다.

상세 사진

 

우리의 장점

DD 시리즈 이중 디스크 정제기는 제지 산업의 연속 타격 공정에 사용 가능합니다. 이 장비는 원펄프, 화학 목재 펄프, 기계 펄프 및 폐지 펄프의 연속 타격에 적합합니다.
*특수 설계된 회전 디스크는 재고 관리 기능에 따라 자동으로 정렬됩니다.

이점 :
*정제 조건에 따라 전기기계 장치를 통해 간극을 조절할 수 있습니다.

*정련 디스크를 쉽고 빠르게 교체할 수 있는 특수 공구.

*안정적이고 신뢰할 수 있는 작동을 보장하는 고강도 용접 구조
 

*타격 효과는 안정적이고 균일합니다.

주요 특징

1. 펄프의 타격도와 습중량을 개선합니다. 
2. 해당 장비는 자동 제어 시스템을 갖추고 있어 일정한 출력 또는 일정한 에너지 소비로 작동할 수 있습니다. 
3. 회전 디스크와 메인 샤프트는 스플라인 방식으로 연결되어 두 연삭 영역의 압력 균형을 유지합니다.
4. 진동 효과는 안정적이고 균일합니다.

제품 매개변수

품목 유형	DD-380	DD-450	DD-500	DD-550	DD-600	DD-660	DD-720	DD-900	DD-1100
판의 직경	Φ380	Φ450	Φ500	Φ550	Φ600	Φ660	Φ720	Φ900	Φ1100
생산량(톤/일)	6-20	8~80	10~100	10~120	12~150	15~200	15~250	20~400	40~800
힘	37	90~160	132~200	160~250	185~315	220~500	250~800	315~1000	400~1800
일관성	3%~5%

구조와 원리

이 정제기는 본체, 연결 장치 및 공급 장치 등으로 구성됩니다.

1.본문

정제기는 2개의 CZPT 섹션으로 구성됩니다. 마모 패턴의 경사각에 따라 4개의 CZPT 플레이트(좌측 2개, ​​우측 2개)가 고정됩니다. 좌측 플레이트 2개는 기계 본체의 내벽과 회전 디스크 내부에 고정되고, 우측 플레이트 2개는 회전 디스크 외부와 이동식 받침대에 고정되어 2개의 CZPT 섹션을 형성합니다(설치 지침은 도면 참조). 원료는 유입관을 통해 CZPT 섹션으로 이송됩니다. 분쇄 및 정제 과정을 거친 후, CZPT 섹션에서 펌프를 통해 본체로 유입되고, 최종적으로 배출관을 통해 배출됩니다.

메인 샤프트에는 2개의 베어링이 있으며, 베어링 받침대로 고정되어 나일론 컬럼 핀을 통해 모터에 연결됩니다. 턴테이블은 메인 샤프트의 반대쪽에 있습니다. 턴테이블 양 끝에는 CZPT 디스크가 있으며, 턴테이블은 이 두 CZPT 디스크 사이에서 회전하며 압력에 의해 축 방향으로 이동합니다.

이동식 받침대는 축 방향으로 움직이는 이송 기어를 통해 조정되어 두 개의 CZPT 섹션 사이의 간격을 조절합니다. 페더 키는 이동식 받침대와 기계 케이스 사이에 설치되며 사다리꼴 나사에 의해 밀립니다.

덮개는 핀롤로 케이스와 연결된 용접 구조입니다. 덮개를 열기 전에 가동 받침대 전체를 덮개 안으로 밀어 넣고 잠금 볼트를 풀어주십시오. 덮개를 닫기 전에 표면을 깨끗하게 유지하고 가동 받침대를 덮개 안으로 완전히 밀어 넣으십시오. 그런 다음 볼트를 균일하게 조여 고정하십시오.

2. 커플링

이 커플링은 분해 및 유지보수가 용이한 나일론 컬럼 핀으로 연결되어 있습니다. 이송 및 배출 시 변위 요구 사항을 충족하고 토크를 전달합니다.

3. 이송 기어

이송 기어는 웜 기어 감속 시스템을 덮습니다. 웜 기어의 힘으로 사다리꼴 나사가 회전하여 가동 받침대를 앞뒤로 움직입니다. 가동 받침대는 모터가 한 바퀴 회전할 때마다 0.23mm씩 이동합니다. 시계 방향으로 회전하면 앞으로 이동하고, 반시계 방향으로 회전하면 뒤로 이동합니다.

현장 사용

 

회사 소개

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.

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.

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.

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.