The choice of coupling mainly considers the speed of the required transmission shaft, the size of the load, the installation accuracy of the two connected parts, the stability of rotation, the price, etc., refer to the characteristics of various couplings, and choose a suitable one. Coupling type.The following points can be considered in the specific selection: 1.Due to reasons such as manufacturing, installation, load deformation and temperature changes, it is difficult to maintain strict and accurate alignment of the two shafts after installation and adjustment.There is a certain degree of displacement in the x and Y directions and the deflection angle CI.When the radial displacement is large, you can choose a slider coupling, and when the angular displacement is large or the connection of two intersecting shafts, you can choose a universal coupling.When the two shafts produce a large additional relative displacement during the working process, a flexible coupling should be used. 2.The working speed of the coupling and the centrifugal force caused by it.For high-speed transmission shafts, couplings with high balance accuracy, such as diaphragm couplings, should be selected, rather than slider couplings with eccentricity. 3.The size and nature of the torque to be transmitted and the requirements for the function of damping vibration.For example, gear couplings can be used for high-power and heavy-duty transmissions.For severe impact loads or transmissions that require the elimination of shaft torsional vibration, tire couplings can be used.