What is a planetary gear reducer
Publish Time: 2022-04-12 Origin: Site
Planetary gear reducer is also called planetary reducer and servo reducer.In the reducer family, planetary reducers are widely used in transmission systems such as servo motors, stepper motors, and DC motors due to their small size, high transmission efficiency, wide deceleration range, and high precision.Its function is to reduce the speed, increase the torque, and reduce the moment of inertia ratio of the load/motor under the premise of ensuring accurate transmission.
The main transmission structure of the planetary gear reducer is: planetary gear, sun gear, ring gear, planet carrier.
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.Common reduction ratios are 3/4/5/6/8/10, and the number of reducers generally does not exceed 3, but some large reduction ratios have four-stage reduction of customized reducers.Compared with other reducers, the planetary 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, and maintenance-free for life.Due to these characteristics, planetary reducers are mostly installed on stepper motors and servo motors to reduce speed, increase torque, and match inertia.The rated input speed of the planetary reducer can reach 18,000 rpm (related to the size of the reducer itself, the larger the reducer, the smaller the rated input speed), and its working temperature is generally around -25°C to 100°C.Its working temperature can be changed by changing the grease.
Since the precision planetary reducer is equipped with a servo motor, the backlash level (arc minutes) is very important, and the price difference of different backlash levels is quite large.The planetary reducer can be used as a multi-gear box with a reduction ratio of 100,000.
Operating parameters
The peripheral speed of gear transmission shall not exceed 10m/s..
The input shaft speed is not higher than 1500 rpm.
The working environment temperature of the reducer is -40°C-+45°C.
Reducers are available for forward and reverse operation.