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Working Characteristics of JZM Heavy Duty Diaphragm Coupling
2022-11-16

JZM type heavy-duty diaphragm coupling is a high-performance diaphragm coupling, which is one of the main types of non-lubricating couplings used in turbomachinery, used to transmit torque and adjust equipment Misalignment between shafts. These couplers rely on the bending of the metal membrane to accommodate angular and axial misalignment.

JZM type heavy-duty diaphragm coupling contains important life and safety factors. This coupled metal film consists of thin, multiple, coiled and separated diaphragms. Each of these properties provides benefits to the overall coupled design. Diaphragm life is not dependent on operating angle within its design ratings. The curved area is separated at the ID and OD and then clamped securely. This separation prevents fretting corrosion from friction in the flexure areas associated with multi-membrane couplings. Because there is no fretting, the designer can reasonably use the characteristics of the raw materials, and use the classic life engineering fatigue analysis method to design the diaphragm. The reduction in durability or reliability of the diaphragm material is not caused by fretting corrosion or wear in the flexure areas. In fact, there is no consideration for the additional benefit of each individually shot-peened diaphragm.

In the JZM type heavy-duty diaphragm coupling, we will find that the torque needs to be transmitted radially from the outer diameter of the driving flange to the inner diameter of the attachment through one or more metal plates during use. The diaphragm can be constant or tapered in thickness, flattened, curled, or spoked. The diaphragm outer diameter is usually bolted and the inner diameter can be electron beam welded, splined or bolted. In the typical flange-flange connection of the JZM type heavy-duty diaphragm coupling, the torque mainly makes the bolts subject to shear stress.

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