The flexible diaphragm coupling is a transmission device that uses metal flexible elements to transmit torque without lubrication. It is widely used in ships, aviation, petrochemicals, machinery manufacturing, etc.

The types of misalignment that can be compensated by the diaphragm coupling include the following three basic types: angular (the point where the two axes meet at an angle between the two shaft ends), lateral (the two axes are offset from parallel lines) and axial (the two axes are offset from parallel lines). Axial clearance is too large), the actual offset that occurs when the rotating shaft system is running is often a combination of any two of the above misalignments or three forms of misalignment at the same time. Therefore, the actual working load and deformation of the diaphragm coupling are compared. complex. As the key elastic element of the elastic diaphragm coupling, the diaphragm bears the main load during operation. When the coupling rotates, its angular offset will generate alternating stress, which alternates once per rotation. The dynamic stress of the diaphragm will lead to the fatigue damage of the diaphragm and the bolt, so the accurate calculation of the dynamic and static composite stress is the key to predict the life of the diaphragm and determine the operation of the diaphragm coupling.

The difference between the single-diaphragm coupling and the double-diaphragm coupling is the ability to handle various deviations. In view of the complex bending of the diaphragm coupling, the single-diaphragm coupling is not suitable for eccentricity. The double-diaphragm coupling can bend in different directions at the same time to compensate for the eccentric effect.

The characteristics of the diaphragm coupling are similar to the bellows, in fact, the couplings transmit torque in the same way. The diaphragm itself is thin, so it bends easily when a relative displacement load occurs, so it can withstand up to 1.5 degrees of deviation, while producing low bearing loads in the servo system, the diaphragm coupling has good torque, It is also very delicate. If it is not standardized during use or installation, it is easy to be overloaded and damaged.

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