The relationship between planetary gear backlash and return error: The planetary gear reducer is composed of multiple planetary gears, the inner ring gear of the sun gear and the transmission shaft, and the return error of each planetary gear is converted into a sun gear, and then calculated uniformly.
The calculation of the return error of the planetary reducer can be summarized as two comprehensive calculations:
1. The comprehensive formula of planetary gear return error: When the sun gear is used as the output, the ring gear is fixed, and the planetary gear is used as the output, the return error is generally converted into the return error of the sun gear, and the temperature rise of the shaft is considered after calculating the return error of the sun gear. and torque deformation.
2. The comprehensive formula of the return error of the planetary gear transmission chain: the return error problem is actually the sum of the return errors of the planetary gears at all levels. In the calculation process, the actual situation of the planetary gears at all levels should be considered. According to its inherent characteristic parameters , the calculation resource allocation provides the corresponding correction model coefficients, and the return errors of the planetary gears at all levels are accumulated and operated through continuous correction coefficients, and superimposed on a transmission shaft, and then analysis and calculations are carried out for the design of this transmission shaft. Finally, the return error of the transmission chain can be obtained.
Related measures to reduce the return error of the planetary reducer:
1. Precisely process some parts of the planetary gear reducer to achieve high precision, or process the entire transmission chain with high precision.
2. According to the comprehensive formula for the return error calculation, the return error of the planetary gears at all levels is reasonably distributed by using the optimization method to achieve the total return error.This method will not increase the production cost, so apply this method.This method is to adjust the return error of each part of the planetary gear according to the correction coefficient.Here, the return error of the final planetary gear accounts for a large proportion, so it is generally necessary to first adjust the return error of the final gear pair to reduce it, and the other stages are carried out in sequence.
