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What is a planetary gear reducer

Views: 2     Author: WGT     Publish Time: 2022-04-12      Origin: Site

What is a planetary gear reducer

Planetary gear reducer is also known as planetary reducer and servo reducer. In the reducer family, planetary reducer with its small size, high transmission efficiency, wide deceleration range, high precision, widely used in servo motor, stepper motor, DC motor and other transmission systems. Its function is to reduce the speed, increase the torque and reduce the load/motor rotational inertia ratio under the premise of ensuring accurate transmission.


The main transmission structure of planetary gear reducer is: planetary gear, sun gear, gear ring, planetary frame.


Due to structural reasons, the minimum single-stage deceleration of the planetary reducer is 2.8, and the size generally does not exceed 12.5. The common reduction ratio is 3/4/5/6/8/10, and the number of reduction gear generally does not exceed 3, but some large reduction ratio has four levels of customized reduction gear. Compared with other gear reducer, planetary gear reducer has the characteristics of high rigidity, high precision (less than 1 point for a single stage), high transmission efficiency (97-98% for a single stage), high torque/volume ratio, lifetime maintenance free, etc. Because of these characteristics, planetary decelerators are mostly mounted on stepper motors and servo motors to reduce speed, increase torque, and match inertia. The rated input speed of the planetary reducer can be up to 18000 RPM (related to the size of the reducer itself, the larger the reducer, the smaller the rated input speed), and its operating temperature is generally around -25℃ to 100℃. Its operating temperature can be changed by replacing grease.


Because precision planetary reducers are equipped with servomotors, the back clearance class (arc minutes) is very important and the price of the different back clearance classes varies considerably. The planetary reducer can be used as a multi-gear box with a reduction ratio of 100,000.


Operation parameters

The circumferential speed of gear transmission shall not exceed 10m/s..

Input shaft speed is not higher than 1500 RPM.

The operating temperature of the reducer is -40℃-+45℃.

Reducer can be used for forward and reverse operation.


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