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What is a coupling?

The information comes from:互联网 posted on:2021-06-22

Couplings are also known as couplings. It is used to firmly connect the driving shaft and the driven shaft in different mechanisms and transmit the mechanical components of movement and torque. It is also sometimes used to connect shafts with other parts (eg gears, pulleys, etc.). It is usually composed of two halves, which are connected by keys or tight fits, and fastened to the ends of the two axes. Then the halves are connected in a certain way. Couplings can also compensate for offsets (including axial, radial, angular, or composite) between two axes that are due to inaccurate manufacturing installation, deformation during operation, or thermal expansion. And ease shocks and shock absorption.
Most of the commonly used couplings have been standardized or standardized. Under normal circumstances, only the type of the coupling is properly selected, and the type and size of the coupling are determined. If necessary, check and calculate the vulnerable capacity of vulnerable parts; if the rotation speed is high, check the centrifugal force of the outer edge and the deformation of the elastic element, and balance the calibration.
Coupling Type Selection When selecting the coupling type, the following items should be considered.
1 The size and nature of the required transmission torque, the requirements for cushioning and damping functions, and whether resonance may occur.
2 The degree of relative displacement of the two shaft axes due to manufacturing and assembly errors, shaft loading and thermal expansion deformation, and relative movement between components.
3 Permissible external dimensions and mounting methods, in order to facilitate the necessary operating space for assembly, adjustment and maintenance. For large couplings, disassembly and assembly should be possible without axial movement of the shaft.
In addition, the conditions of work environment, service life, lubrication, sealing, and economy should also be considered. Then, with reference to the characteristics of various types of couplings, choose a suitable type of coupling.
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