What are the performance characteristics of high-precision diaphragm couplings

What are the performance characteristics of high-precision diaphragm couplings?

Diaphragm couplings are one of the main types of non-lubricated couplings used in high-precision turbomachinery, which are used to transmit torque and adjust the misalignment between equipment shafts. These connectors rely on the bending of the metal film to accept angular and axial deviations.

The diaphragm coupling transmits torque from the outer diameter direction of the drive flange to the inner diameter accessory via one or more metal plates. The thickness of the diaphragm can be constant, cone-shaped, flat, crimped, or spoke-shaped. The outer diameter of the diaphragm is usually fixed with bolts, and the inner diameter can be electron beam welding, splines or bolts. For the model flange-flange connection of the diaphragm coupling, the torque mainly affects the shear stress of the bolt.

The diaphragm coupling from okplazas.com contains a tight life and composition. The bonded metal film is composed of thin, multiple, curled, and separated film sheets. Each of these features contributes to the overall coupling design. The life of the diaphragm has nothing to do with the working angle within the set rating.

The bending area is separated according to the inner diameter and outer diameter and clamped firmly. This separation prepares for fretting erosion caused by friction in the bending area associated with multi-membrane coupling. Without fretting, the designer can reasonably use the original quality characteristics and accept the classic infinite life engineering commissioned explanation technology to design the diaphragm. The reduction in the limit and reliability of the film material over time is not caused by fretting erosion and wear in the bending area. In fact, the effect of the separators of individual shot peening is not considered.

Using finite element description and appropriate stress determined by strain gage experiments, zurn can count the coefficients with any commissioned invalid theory. The American flexible coupling is a truly unlimited life design, and the life of the diaphragm assembly exceeds 20 years. During operation, regardless of the coupling setting rating, environmental conditions, angle and axial deviation within the usage amount, it is converted into a predictable equipment guard and inspection interruption.

If the flexible diaphragm coupling is excessively deviated and the excitation request is invalid, the crack will gradually expand through the separation of the bending area of ​​the diaphragm. Very finally, in the case where each diaphragm is ineffective, the diaphragm of the program is sheared at its inner diameter due to the excessive torque.

Regardless of the reason for the invalidation, it is the very final invalidation caused by commission and peak overload, preventing the inner diameter of the diaphragm from being cut from the gasket and the reel, and the power is transferred from the driving equipment to the driven equipment. The instantaneous load loss can cause the standard turbomachinery to overspeed trip. After the cut is invalid, the yoke guard plate assembly of the Ameriflex coupling includes a middle surface, in order to ensure that it can guard adjacent equipment.

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