Diaphragm coupling device and selection

　　The main researches in this paper are as follows: ①Based on the theory of multi-body dynamics, a virtual prototype of the diaphragm coupling multi-rigid body is established by using the virtual simulation software ADAMS.At the same time, the diaphragm is made flexible based on the multi-rigid body model, the rigid-flexible coupling model of the coupling is established, and the dynamic response of the diaphragm is obtained. ②According to the diaphragm stress-time history obtained by the rigid-flexible coupling analysis, combined with the fatigue analysis software FATIGUE to perform the fatigue analysis of the diaphragm, the fatigue damage diagram and fatigue life of the diaphragm are obtained. ③Based on the vibration theory and combined with the finite element analysis software PATRAN/NASTRAN, the finite element model of the diaphragm coupling is established. Through modal analysis, the first 10 vibration modes and natural frequencies of the coupling are calculated, and then calculated The first five-order critical speed of the coupling is compared with its working speed to verify whether resonance will occur.Therefore, this paper provides a scientific and reliable basis for the analysis and independent design of the diaphragm coupling, which has important theoretical significance and engineering practical value for enterprises to solve the problems of coupling vibration and life, and reduces the design of the company in the design process. Defects, shorten the development cycle, reduce production costs, quickly respond to user needs and market changes, and improve the competitiveness of enterprises, which have important theoretical significance and practical value.
　　Diaphragm coupling device measures: before the diaphragm coupling device, the end faces of the two shafts should be cleaned, and the common conditions such as the end face key notches should be reviewed; the diaphragm coupling device must be checked for screws in normal operation in the future; in order to avoid the film The fretting wear of the diaphragm during high-speed operation causes micro-cracking and damage to the bolt holes of the diaphragm. Solid smoothing agents such as molybdenum disulfide can be applied between the diaphragms or the surface of the diaphragm can be treated with anti-friction coatings. Diaphragm coupling; should prevent the occurrence of long-term overload use and operation disorder; in the operation of the task, it should be often introspected whether the diaphragm coupling can produce abnormal scenes, if abnormal scenes occur, repairs must be performed; Every site where the diaphragm coupling causes disturbances in personnel and equipment must adopt appropriate safety protection methods.Pay attention to the problem of the coupling device and handle it correctly to ensure the completion of the installation.Regular observation, inspection, and maintenance work to achieve practical installation.
　　With the continuous development of science and technology, wind power technology has developed rapidly in the world. More and more megawatt large-scale wind turbines have been built and put into operation one after another, and the wind power market has a very broad prospect.Diaphragm coupling is an important part of wind turbine generator set, while metal diaphragm is a key component of diaphragm coupling. Torque and movement are transmitted through it, and its design will directly affect the normal operation of the entire unit. Operation and service life, therefore, vibration analysis and fatigue calculation of the diaphragm coupling are carried out in the design stage to provide a basis for the reliability design of the coupling.In this context, the research of this thesis is to perform vibration analysis and fatigue calculation on the diaphragm coupling of a wind turbine in response to the needs of a certain enterprise.
　　Coupling is a kind of transmission part in mid-end enterprise equipment. Coupling is an integrated energy-saving part that can accelerate production efficiency and save people's labor. How to measure the size of the coupling?
　　The parameters of the shaft hole of the coupling means that there are three rows of data of the national standard for each hole diameter, which can be selected for you, and the size and torque of your motor shaft determine the size of the hole you choose and the outer diameter of the entire coupling.
　　The shaft length and total length of the coupling can also be determined by you according to your equipment. The data on your table are the parameters of the coupling national standard. If you don’t want to do it according to the coupling parameters, It is necessary to order couplings for non-standard products. However, the total length of the coupling and the diameter of the shaft hole of each model should not exceed the national standard too much, because if the shaft hole and shaft length of the coupling exceed too much, the external The circle and the melon platform are narrowed. In this case, the high speed may not drive your equipment, that is, the coupling torque cannot reach.
　　Usually when we choose the coupling that suits us, we first choose the coupling model that suits our own type according to the needs, determine the national standard model, and then measure the appropriate shaft hole and shaft length according to our needs.