Diaphragm couplingRelying on the elastic deformation of the diaphragm to compensate the relative displacement of the connected two shafts, it is widely used in the shaft transmission of chemical industrial machinery devices.
Diaphragm couplings are two half-shaft joints respectively installed on the two shafts, with an extended section in the middle. A set of diaphragms are connected together in the correct way with precision bolts, and there must be a certain gap between the two diaphragms. .Under normal circumstances, the two shafts are installed according to a certain model and the power is selected by the diaphragm coupling.In the stop state, if the concentricity meets the standard, the two springs are in a free state, and the force is not required to be compensated, or the compensation is very small, and there is almost no deformation or very small deformation of the diaphragm.After operation, the diaphragm is subjected to radial torque to transmit torque, and it is generally not damaged. The service life is generally more than 2 years.
Due to the misalignment of the axis between the prime mover and the pump, the axis lines of the two shafts are not in line. After the diaphragm is installed, the elastic deformation of the diaphragm is used to compensate for the difference in concentricity. The more the bolts of the diaphragm are The poorer the multi-compensation capability, the better the installation performance.If the concentricity differs too much, the greater the compensation by the diaphragm, the more obvious the distortion and deformation of the diaphragm, and the greater the force on the diaphragm itself.After operation, the diaphragm is easy to cause fatigue and damage when it is twisted and stressed.Poor concentricity is one of the main reasons for the distortion of the diaphragm, so if the diaphragm is distorted, you should first start with the concentricity check.
Although the diaphragm coupling has a strong compensation capability, it must be strictly aligned during installation to make the unit work balanced to increase the service life of the coupling. Generally speaking, the service life is up to ten within the standard tolerance range. Ten thousand hours, among which the diaphragm which is a vulnerable part is generally not less than 1.2 hours to replace a group. The greater the compensation amount, the shorter the service life, so ensure that the flexure is flat and free of deformation during installation.