时间：2014-02-20 18:26　作者：admin　点击： 次

The diaphragm isDiaphragm couplingThe key components of the coupling, because the stiffness of other parts in the coupling is much greater than that of the diaphragm, the stiffness of the diaphragm can be regarded as the stiffness of the coupling.Due to the axial deviation of the coupling, the transmission of torque, and the bearing of centrifugal force, the diaphragm is in a complex state of stress during operation.The diaphragm is used as an elastic element, and the load it bears is shown in Table 1.
Table 1 Loads borne by the diaphragm

Transmit torque	Rotating centrifugal force	Screw tightening force	Axial offset	Radial and angular offset
Membrane stress	Centrifugal stress	Squeeze stress	Bending stress	Bending stress

 
1) Diaphragm stress, set the transmission torque as the transmission torque as T(N·m), and the total number of pieces as m. For 8-hole bolts, from simplified conditions, T single piece = T/m, each main bolt The force on the top is F=T/4mR;
2) Centrifugal stress. Assuming that the bolt and the diaphragm are of the same material, the respective masses can be calculated. According to the position and the spiral angle, the centrifugal force can be calculated, and it acts on the total center of mass.
3) The bending stress caused by the axial displacement, due to the installation error in the axial direction, causes the diaphragm to bend and deform in the axial direction. The axial force can be obtained by the magnitude of the axial displacement.
4) The bending stress caused by radial and angular displacement, due to the actual installation error in the axial angle, causes the diaphragm to be cyclically bent and deformed along the axial direction, and it is the main factor that determines the fatigue life of the diaphragm. It is tilted through the angle The magnitude of the restoring torque can be obtained.
When the diaphragm transmits torque, the torque is transmitted along the tangent direction of the bolt distribution circle through the active bolt and the diaphragm element to drive the driven bolt.Ignoring the slight relative movement between the diaphragms, it is considered that each diaphragm bears the torque uniformly. When the coupling transmits torque, the plane of the diaphragm is stressed, the circle with the shaded part indicates the input of the active end, and the blank circle indicates the input of the driven end Output.