Features of diaphragm coupling

1. The ability to compensate for the misalignment of the two axes is strong. Compared with the gear coupling, the angular displacement can be doubled, the reaction force is small during radial displacement, and the flexibility is large.

2. It has obvious shock absorption, no noise, no wear, and long life.
3. Adapt to work in high temperature (-80+300) and harsh environments, and move under shock and vibration.
4. High transmission efficiency, up to 99.86%.Especially suitable for medium, high speed and high power transmission.
5. Simple structure, light weight, small size, convenient assembly and disassembly.It can be assembled and disassembled without moving the machine, and no lubrication is required.
6. It can accurately transmit the speed, no slip, and fast rotation.
Wind energy is an inexhaustible clean and renewable energy. In-depth study of various technologies of wind power generation is of great significance for the sustained development of wind energy and the realization of the localization of wind power equipment.Diaphragm coupling is the connecting part of the high-speed shaft of the speed-increasing gearbox of the wind turbine generator and the rotor shaft of the generator, and it is one of the important parts in the transmission chain of the wind turbine generator.The diaphragm coupling can transmit high power, long life, simple structure, does not need lubrication and can compensate axial, radial and angular displacement, and is suitable for use on high-speed and high-power units.It must have sufficient strength and rigidity to ensure that the unit can operate normally under various load conditions.According to the needs of wind power manufacturing enterprises, based on material mechanics, elastic mechanics, fracture mechanics, etc., the finite element method is adopted, and the German Lloyd Register (GL) wind turbine certification specification is used as the basis for large-scale wind turbines.Diaphragm couplingCarry out design calculation analysis to fill the domestic gap.Based on the application status and development trend of wind power technology at home and abroad, this paper introduces the domestic and foreign research and application status of diaphragm couplings, and derives the significance and main content of the thesis research.Through the description of the structure and characteristics of the diaphragm coupling, in accordance with the material selection and selection requirements of the diaphragm coupling and the load and working conditions of the diaphragm coupling, the preliminary design and overall design of the diaphragm coupling Design and establish the solid geometric model of the high-speed diaphragm coupling of the wind turbine.Based on elastic mechanics theory and finite element method, the strength finite element analysis of one of the key components of the diaphragm coupling—the diaphragm is carried out.Considering the torque, centrifugal force, axial displacement, radial displacement and angular displacement of the diaphragm, the finite element model of the diaphragm is established, the ultimate strength check and buckling calculation are carried out, and the calculation results are analyzed and discussed. The axial, radial and angular offset and strength buckling of the coupling under different working conditions meet the design requirements.According to the theory of fracture mechanics and fatigue cumulative damage, considering the influence of average stress on fatigue life, the load spectrum is compiled according to the actual load of the diaphragm, and the fatigue life analysis is carried out to ensure its normal operation and service life.According to different structural optimization methods, the density method is used to optimize the topology of the diaphragm according to the structural characteristics of the diaphragm.Establish a finite element model for topology optimization, perform static strength analysis, and then topology optimization of the diaphragm, and then check the static strength, buckling, modal, and fatigue of the optimized diaphragm, and get the best Diaphragm structure.