In mechanical transmission, power machines are nothing more than electric motors, internal combustion engines and steam turbines. Due to the different working principles and structures of power machines, their mechanical characteristics are very different. Some run smoothly, and some have shocks during operation, which have unequal effects on the transmission system. , The mechanical characteristics of the power machine have a certain impact on the entire transmission system. For different types of power machines, due to their different mechanical characteristics, the corresponding power machine coefficient KW should be selected and the coupling suitable for the system should be selected.

　　Couplings belong to the category of general mechanical parts. They are used to connect two shafts (active shaft and driven shaft) in different mechanisms to rotate together to transmit torque. In the high-speed and heavy-duty power transmission, some joints The shaft device also has the function of buffering, damping and improving the dynamic performance of the shafting. The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft. Generally, the power machine is mostly connected with the working machine by means of a coupling. It is the main component of the shaft transmission of mechanical products.

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