Influence of assembly error of plum-shaped elastic coupling on mechanical transmission

　　After the quincunx elastic coupling and the connecting shafts at both ends are assembled, the axial clearance of the main and driven ends is easy to control, and the control of the coaxiality of the main and driven ends (ie radial error and angular error) is A difficulty in assembly, we generally use a mechanical dial indicator to measure the radial error (measuring the outer circle of the coupling) and angular error (measuring the end face of the coupling), by adjusting the motor or deceleration that matches the coupling. Adjust the motor like a machine, because the weight of the motor is relatively small to control the assembly error. Of course, you can also use a feeler gauge to determine the angular error through the side end face gap, but this method is not as accurate as the dial indicator measurement. It can be used in coordination with low measurement requirements.
　　1. The influence of direction clearance error on mechanical transmission
　　Axial clearance is an easy-to-control assembly error in the assembly process. Depending on the size of the aperture of the coupling model, the axial clearance is also different, generally 1-5mm.However, if the axial clearance is too small, it is easy to cause the resistance to increase when the machine rotates, and even cause the motor to lock up. If the axial clearance is too large, the damage of the elastic member will accelerate, and even cause the main and driven ends to separate.
　　2. The influence of radial error and angular error on mechanical transmission
　　The radial displacement and the angular error are two aspects of the coaxiality of the two connecting shafts. The control of the radial displacement and the angular error is a major difficulty in the assembly process of the coupling, and it is also an important aspect that affects the mechanical operation. Shaped elastic coupling, the allowable range of radial displacement and angular error is related to the size of the coupling aperture. There are detailed regulations in the national standard c B/T5272. In order to improve the assembly accuracy of the coupling, try to improve the coupling The flatness accuracy of the assembly surface of the motor and reducer connected to the motor and reducer is an effective way. In addition, the center height of the motor output shaft and the input shaft of the reducer can be measured and determined, and the mechanical dial indicator can be used to assist the assembly. The efficiency is greatly improved.
　　The radial displacement and angular error can directly affect the stability of the transmission. The radial displacement and angular error exceed the standard. The rotating coupling will have obvious abnormal reflections. First, the naked eye can detect the rotation of the coupling. Shaking, and secondly, the sound caused by mechanical rotation can be heard to increase significantly. After that, use a vibration meter to measure the fixed part of the output end of the motor or the input end of the reducer. It can be measured and found that the vibration speed and vibration displacement are obviously deviated from normal operation. Big.
　　The influence caused by the large radial displacement and angular error is not only the frequent damage of the elastic parts of the current plum-shaped elastic coupling, but also importantly, it seriously affects the service life of the motor and the reducer. Motor bearings are prone to heat and wear, and even endanger the sealing ring of the input end of the motor from the coil reducer, which is easy to damage, causing oil leakage at the shaft end. Of course, excessive vibration can also cause varying degrees of damage to the bearings and gears.