The transmission ratio of planetary reducer is constant

In the traditional no-load torque test of planetary reducer, the torque wrench is installed at the input end of the reducer at normal temperature to gradually increase the torque. The output shaft changes from static to rotating, and the torque value is recorded. The torque value will present from small to large, and then reduce. During the test, the rotation of the output shaft is greater than 10 turns, and the maximum torque value is the no-load rotation torque of the planetary reducer. However, human factors account for a large proportion of this test method, and it is difficult to control the speed of the torque wrench. Because the input speed will directly affect the output torque fluctuation of the reducer, it is difficult to observe the small torque transformation of the reducer.

This method uses a set of servo drive system to dynamically measure the mechanical efficiency of the reducer. The method of testing transmission efficiency of reducer with a set of servo system does not need to prepare a special test platform, but only needs to connect the reducer with a set of existing servo drive device, and test the planetary reducer by measuring and analyzing the torque fluctuation value.

Methods the computer is connected with the controller and driver, the driver is connected with the motor, and then the motor is directly connected with the planetary reducer. The efficiency is an important performance index of the planetary reducer, but the efficiency needs to be measured under the running state of the reducer, which is not easy to measure in general.

The transmission ratio of the reducer is constant, that is, as long as the torque of the input and output shaft is measured, the deformation of the planetary reducer when transmitting the torque can be measured, and the torque of the shaft can be measured as long as the relative torsion angle of the two sections of the input shaft (or output shaft) is measured.