The balance of the coupling and the function of the elastic pin coupling

　　The big function of the elastic pin coupling is to connect two shafts and sometimes the shaft and other rotating parts. The big function of the elastic pin coupling is to connect the two shafts and sometimes the shaft and other rotating parts, so that the two shafts can rotate together. Transmit movement and torque.Make the two shafts rotate together to transmit motion and torque, realize the connection and separation between the shaft and the shaft, so as to realize the transmission and interruption of power.
　　Realize the connection and separation between the shaft and the shaft, so as to realize the transmission and interruption of power.The elastic pin coupling also has the ability to compensate for the deviation of the two shafts to eliminate or reduce the additional load caused by the relative deviation of the two shafts, improve the transmission performance and extend the life of the machine.In order to reduce the vibration of the mechanical transmission system and reduce the impact peak load, the elastic pin coupling should also have cushioning and shock absorption performance.
　　Unbalanced centrifugal inertial force, centrifugal inertial couple force and dynamic deflection (vibration shape) will occur during operation. For various reasons, the center of mass or inertial principal axis of the coupling does not coincide with the axis of rotation.It is called the unbalance phenomenon of the rotor. This unbalance phenomenon will definitely cause the vibration of the shaft system, thereby affecting the normal operation and service life of the machine, so it must be paid attention to.The level of unbalance (unbalance U is usually expressed by the product mr of the mass m of the rotor and the distance r from the center of mass to the axis of rotation of the rotor, called the product of mass diameter. It is also expressed by the product of mass diameter per unit mass called the eccentricity e is not Eccentricity in the geometric sense. The mass diameter product mr is a relative quantity related to the mass of the rotor, and the eccentricity e is a quantity that has nothing to do with the mass of the rotor. The former is more intuitive and is often used in the balancing operation of a specific given rotor, and the latter is used to measure The pros and cons of the rotor balance or the detection balance accuracy, the balance grade specification of the coupling is evaluated according to e. For the flexible rotor, the mode eccentricity (the nth mode) en=Un/mnUnmn is the nth order respectively Mode shape and order modal quality.
　　In order to correct or minimize the unbalance of the coupling, the appropriate balance level should be selected according to the needs, and after the product is manufactured and installed on the machine, the coupling is specified on the balance (correction) plane by adding Or reduce the method of appropriate quality to achieve the balance level requirements.This process is called balance correction, or balance for short.