0 Membrane 蔌 离 离 æ…• 在 在 抗 抗 抗 抗 抗 抗 抗 抗 抗 å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾ å¾Its working principle of working principle, etc., in order to make a reasonable match in the design of the whole vehicle.
1 Structure and working principle The clutch is composed of the clutch cover assembly 1 and the driven disc assembly 2 and the split bearing assembly 3, and is mounted on the engine flywheel 4. The average radius of the cylinder at the optimal position on the 13th page is related to the thickness of the cylinder. The empirical formula is 3. Through the analysis of the grounding of the 34th project of Xiaolongtan Coal Mine in Yunnan Province, it is proved that the drum structure is calculated by the above formula. Can meet the actual use requirements. Compared with the finite element calculation, the result is. It is more convenient and quick to calculate by the method described in this paper. For example, computer programming can be used to complete the design.
1 Yang Fuxing. Belt conveyor structure principle and calculation. Beijing Coal Industry Press, 1983 combiner cover assembly consists of the clutch cover platen front and rear support ring separation hook drive piece diaphragm spring and so on.
Working principle of the diaphragm spring clutch 3 When the engagement state of the diaphragm spring is large, the pressing force of the diaphragm spring to the pressure plate is between the pressure plate and the driven plate assembly friction plate and between the engine flywheel and the driven disk assembly friction plate. Friction is generated to transfer engine power to the first shaft of the transmission. In the disengaged state, the disengagement bearing assembly is moved forward by the clutch disengagement mechanism to push the small end of the diaphragm spring, and the pressure plate leaves the friction plate under the elastic force of the transmission piece to cut off the power transmission of the engine.
2 Wang Hongen. Strength analysis calculation of the belt conveyor drum. Mining machinery, 3 magic 7. Defects in the design of belt conveyor rollers. Deng Wu translated. Continuous conveying machinery, 1988, 14063. Strength analysis of the drum tray. Translated by Chen Bingzhi. Lifting and transporting 5 Xu Kuangxi translation. Design calculation of the tape roller with the locker. Tape ta, 1985, 6 filial piety. Welding drum through shaft structure and its design. Xu Xinhua translated. Lifting and transporting 7 Lu Hongsheng. The strength of the drum casing of mining belt conveyor and its design calculation address Tianjin Institute of Engineering Machinery, No.3 Road, Dingziyu, Hongqiao District, Tianjin, China 300131 Received date 2001 lifting transport machinery 2002 1. Clutch cover assembly 2. From Moving disc assembly 3. Separating bearing assembly 4. Engine flywheel 1. Clutch cover 2. Pressure plate 3. Front support ring 4. Separation hook 5. Drive plate 6. Platen rivet 7. Support rivet 8. Diaphragm spring 9 Rear support ring 1 balance rivet 1. Drive plate rivet phantom joint position separation position hoisting transport machinery 2002 2 working characteristics torque capacity is large and more stable, at the joint position of the new friction plate at 15 o'clock, two kinds of compression springs The compressive deformation is 13 and the working pressing force is the heart. When the friction plate is worn to the allowable wear amount of 62 ,, at the joint position and point, the deformation amount of both is long-lasting, and the film is worn due to the diaphragm. The spring has a non-linear elastic characteristic, and its pressing force is still close to the clutch, so that the torque capacity of the clutch is relatively stable, and no slip is generated.
Surrounding 4 load deformation characteristics. Coil spring 2. The diaphragm spring pedal is easy to handle. When the platen lift is 4, in the completely separated position, the required separation force is the factory. Obviously, this force is smaller than the separation force required for the compression coil spring.
In addition, since the split lever device of the coil spring clutch is eliminated in the diaphragm spring clutch, the friction loss is reduced, which also reduces the pedal operating force.
When the high-speed performance is good at high speed, the circumferential coil spring will produce lateral deflection under the action of centrifugal force, which will seriously bulge, thus reducing the pressing force and torque capacity of the pressure plate; and the diaphragm spring is circularly rotationally symmetric. Parts, high speed balance, torque capacity is less affected by high speed.
Compared with the coil spring clutch, the diaphragm spring clutch replaces a set of circumferential coil springs with a disc spring, and replaces the array separation rod device with a separate finger to simplify the structure, reduce the number of parts and light weight. The diaphragm spring is flat in shape, making the clutch axially compact and easy to arrange in a limited space.
Compared with the coil spring clutch, the diaphragm spring clutch can be thicker than the coil spring clutch. The cross section of the pressure plate is relatively uniform, 4 to ensure sufficient heat capacity; the clutch cover can be opened. Large venting holes and a small number of parts are beneficial for a good service life.
The pressure distribution uniform diaphragm spring is in contact with the pressure plate over the entire circumference, so that the X-force distribution on the friction plate is uniform, the contact is good, the wear is uniform, thereby improving the service life of the friction plate, and avoiding concentration due to the circumferential coil spring pressurization. In the installation position of the coil spring, the local hot spot on the pressure plate is prone to thermal cracking. 3 The general calculation method of the automobile diaphragm spring clutch before the design calculation is calculated according to the torque capacity and the heat capacity. Forklift diaphragm spring clutches, some of which are constantly adjusted during product development.
3.1 Determination of the size of the friction plate The outer diameter of the friction plate 5 can be determined according to the following empirical formula: the maximum torque of the Memlix internal combustion engine, the heart, the 1 A cross-sectional coefficient, for the single-ply diaphragm of the forklift, the clutch takes the inner diameter of the 0.3 friction plate. It can be determined by =0.530.70, which is related to the calculation of the friction torque of the clutch of 0.6 3.2 friction torque for the forklift. For the cast iron to dry asbestos-based friction material, take the 0.205.35 P diaphragm spring through the pressure plate on the friction plate. Working pressure, 1 friction number, for the single-piece diaphragm spring clutch to take the 2 K0 equivalent friction radius, the torque transmission capacity of the clutch depends on its own friction torque. In order to ensure that the clutch can work effectively for a long time, it must be such that the friction torque of the 18 is greater than the maximum torque of the internal combustion engine. It is necessary to reliably transmit the maximum torque of the internal combustion engine and prevent the clutch from slipping too much. The value of 3 should be larger; Large, reduce the drive train overload, 0 value, should be smaller. For small tonnage forklifts, 3 is 22.5.
3.4 The load of the compression spring The diaphragm spring clutch relies on the action of the diaphragm spring to generate the friction torque, and the required spring; the jade force type 2 and (3) are the diaphragm springs for the design and selection of the separator. The taxi should be based on the work of the Chuxin friction plate at the clutch engagement point.
3.5 Checking and verifying the clutch The calculation is based on the pressure friction torque on the unit friction area and the weight of the internal combustion engine power.
The friction material takes 25 7 F single-sided friction area, factory = 兀 024, m2 according to the friction torque per unit area, 1. The calculation according to the unit area of ​​the internal combustion engine power. Check the small tonnage fork to take the 3, 2P1 internal combustion engine calibration power, let the identification according to the unit area of ​​the whole weight, 1 check m. Allowable unit area noon. For the forklift with asbestos-based friction material, take the design of the 4.8kgcm2 clutch control mechanism to separate the bearing assembly, refer to the relevant information.
Lifting and transporting machinery 2002 4 Application example 4.1 Design selection 1 The diaphragm spring clutch is applied on the forklift. The self-weight of the forklift is 2.7. The rated power of the engine is 30, and the maximum torque is 131. According to the above calculation results, the clutch cover assembly and the driven clutch are assembled. The disc assembly is selected. When the working plane of the clutch cover assembly pressure plate is 8.5 from the working plane of the engine wheel, the working pressure of the pressure plate is 5400±400. The outer diameter of the disk assembly is 254. The inner diameter is rubbed per unit area. The pressure friction torque internal combustion engine power vehicle heavy child school nuclear calculation is less than the allowable value.
4.2 Tests and conclusions We conducted type tests and intensive tests on the prototypes. The traction performance type test verifies that the maximum traction and maximum grade of the vehicle meet the wide design requirements, and the clear clutch can fully transmit the maximum torque of the internal combustion engine. In the 4001 reliability intensification test of the whole vehicle, the whole vehicle needs to complete 8000 working cycles, and each cycle needs to complete the action of reversing before and after the start of the flat road start and stop slope, and the clutch needs to act 10 times, totaling 80,000 times. In addition, the whole vehicle needs to be fully loaded and unloaded alternately through the climbing section and the obstacle section. The test results show that the clutch works normally, the operation is light and the maintenance is convenient. Since the forklift has been introduced to the market in batches, users have generally reflected that the performance of the diaphragm spring clutch is significantly better than that of the coil spring clutch.
1 Lin Shiyu. Design and manufacture of diaphragm springs and disc spring clutches. Nanjing Southeast University Press, 1995 2Department of Automotive Engineering, Jilin University of Technology. Automotive Design. Beijing Mechanical Industry Press, 1981 3 Chen Muzhen. Loading and unloading vehicles. Beijing People's Communications Publishing House, 1986 Beijing Crane Transportation Machinery Research Institute Transportation Machinery Engineering Department j Transportation Machinery Engineering Department was formed by the integration and reorganization of the original transportation room and industrial vehicle room of Beijing Crane Transportation Machinery Research Institute. It was formally established on May 8th, 2nd and 2nd. The headquarters is mainly engaged in the development of new technologies and the development of new products for material handling equipment such as industrial vehicle continuous transportation machinery, and also undertakes mechanical three-dimensional parking garage. Design, manufacture, installation and commissioning of complete equipment engineering projects such as flexible automatic transportation system in the postal parcel automatic access system cargo sorting system.
The product technologies developed by the Ministry, such as internal combustion forklifts and suspension conveyors, have been widely used in various industries. In recent years, the headquarters also undertakes Beijing Zhonghai Yayuan mechanical three-dimensional parking garage Beijing International Post Office Postal Parcel Automatic Access System West Airlines Aircraft Engine Blade Detection System Mianyang Irradiation Processing Center Accumulation Conveyor System Sinotrans DHL Beijing Capital Airport Port Operation Center Express Sorting system and customs container inspection, scanning vehicle system and other engineering projects.
Main business scope 1. Various industrial forklift special vehicles 7. Customs express sorting system 2.0 mobile guiding vehicle system 4, 3 hanging conveyor system electric monorail trolley conveying system various ground conveying systems postal parcel automatic access system mechanical three-dimensional parking Library series rotating container 1 various non-standard equipment. The Automation Control System Transportation Machinery Engineering Department is grateful to all colleagues for their support and help!
The Department of Transportation Machinery Engineering welcomes people of insight to join, and is willing to conduct extensive and comprehensive exchanges and cooperation with all parties in the process of new product development technology transfer Dingcheng project to undertake product entrustment agency; contact Zhang Jigong Guo Shangpeng telephone 010 lifting transport machinery 20077
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