时间：2014-05-30 19:14　作者：admin　点击： 次

Due to different structures and materials, the couplings used in the transmission systems of various mechanical products have very different load-bearing capacities.The load category is mainly for the impact, vibration, forward and reverse rotation, braking, frequent start and other reasons of the working load of the working machine to form different types of loads. For the convenience of selection and calculation, the load of the transmission system is divided into four categories.
The load category of the transmission system is the basic basis for selecting the type of coupling.For working loads with large changes in impact, vibration and rotation, flexible couplings with elastic elements, that is, elastic couplings, should be selected to buffer, reduce vibration, compensate for axis deviation, and improve the performance of the transmission system.The torque during frequent starting, forward and reverse rotation, and braking is several times the torque during normal and stable operation. It is overload work. The service life of the coupling elastic element must be shortened. The coupling only allows short-term overload, generally short-term The overload shall not exceed 2-3 times of the nominal torque.
Low-speed and heavy-duty working conditions should avoid the use of couplings that are only suitable for small and medium power, such as: elastic sleeve pin coupling, core-type elastic coupling, polygonal rubber coupling, tire coupling, etc.; For shafting systems that control overload safety protection, safe couplings should be used; for shafting systems with large changes in load and impact and vibration, flexible couplings with elastic elements and better cushioning and damping effects should be selected.The load-bearing capacity of the metal elastic coupling is higher than that of the non-metal elastic element; the reliability of the elastic coupling with the elastic element being squeezed is higher than that of the elastic coupling with the elastic element being sheared.