Classification and application of diaphragm elastic coupling

The diaphragm elastic coupling is composed of several groups of diaphragms (stainless steel thin plates) interlaced with two halves of the coupling with bolts, and each group of diaphragms is formed by stacking several pieces.The elastic deformation of the diaphragm compensates for the relative displacement of the connected two shafts. It is a high-performance flexible metal elastic element coupling.Without lubrication, the structure is relatively compact, the elasticity is high, the service life is long, there is no rotation gap, and it is not affected by temperature and oil pollution.It has the characteristics of acid resistance, alkali resistance and corrosion resistance. , The structure is relatively simple, and the assembly and disassembly are convenient.

There are generally two types of elastic diaphragm couplings:

Spiral groove type: Spiral groove type elastic coupling is divided into single spiral groove type and double spiral groove type.He has a continuous multi-turn long slot, this kind of coupling has very good elasticity and very small bearing load.It can withstand various deviations and is most suitable for correcting deflection and axial deviation, but its ability to handle eccentricity is relatively poor. Because the spiral groove is bent in two different directions at the same time, a large internal pressure will be generated, thereby Cause premature damage to the coupling.Although the long spiral groove coupling can easily bend under various deviations, it has the same effect on the rigidity of the coupling under the torsional load.Excessive swing clearance under torsional load will affect the accuracy of the coupling and weaken its overall performance.

Application: Due to its poor processing ability, it is most suitable for low torque applications, especially in connection with encoders and other lighter instruments.

Parallel groove type: The parallel groove type elastic coupling usually has 3-5 grooves to cope with the problem of low torque rigidity.The parallel groove type takes into account the short cut without reducing the ability to withstand deviations. The short cut can increase the torque rigidity of the coupling and overlap, so that it can withstand considerable torque.

Application site: This performance makes it suitable for light load applications.For example, the connection of a servo motor and a ball screw.However, this kind of performance will increase the bearing load as the slot size increases, but in most cases, it can effectively protect the bearing.Increasing size means increasing the ability to withstand eccentricity.

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