Diaphragm coupling, number of diaphragm holes

Personal understanding: 1. It is related to the shaft diameter； 2. It is related to the magnitude of the transmitted torque

With a larger number of holes, the torque transmitted is distributed more evenly among the bolts, so the diameter of the bolts can be smaller.

It must be related to the torque or flexibility being transmitted

Characteristics of continuous polyhedral annular and ring-shaped structures: Each coupling is composed of several membranes of equal thickness. The outer edges of these membranes are arc-shaped, which provides good elasticity; moreover, their shape is simple and they are easy to manufacture. However, their elasticity is relatively low. Structures with fewer sides exhibit better elasticity than those with more sides, but too few sides reduce stability. During unidirectional operation, only half of the ring edges bear the torque. Separate link-shaped features: Each diaphragm is composed of a polygon formed by individual thin rods; the shape of these rods is simple, making them easy to manufacture. However, precise spacing between the holes is required. Their performance is similar to that of continuous polygonal rings, but their strength and rotational speed are lower; they are suitable for situations where the size of the coupling is limited. Features of the radial design: Each coupling is composed of several segments, with the screw holes on its outer and inner edges connecting to the driving and driven half-couplings respectively. Torsion occurs during operation, and the shaped holes in the diaphragm are intended to enhance elasticity. Due to this need for elasticity, the difference between the inner and outer diameters should not be too small; therefore, this design is suitable for transmitting moderate to low power levels. Features of the molded diaphragm: Each coupling consists of a single diaphragm, whose thickness decreases in a hyperbolic pattern from the inner diameter toward the outside to maintain equal strength. This design results in high material utilization and good integrity, making it particularly suitable for high-speed transmissions; however, it requires high precision in manufacturing. Features of the wave-shaped diaphragm: The diaphragm has a wave shape in its axial cross-section, exhibits high elasticity, and offers good compensation performance. The membrane thickness can be uniform or non-uniform; single-sheet hyperbolic types with uniform thickness perform well and are currently widely used.