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, the planetary reducer has small size, high transmission efficiency, wide deceleration range, and high precision, and is widely used in servo motors, stepping motors, DC motors and other transmission systems.Its function is to reduce speed, increase torque, and reduce the load/motor rotational inertia ratio under the premise of ensuring accurate transmission.
The main transmission structure of the planetary gear reducer is: planetary gear, sun gear, gear ring, planetary frame.
Due to structural reasons, the minimum single-stage reduction of the planetary reducer is 2.8, and the size usually does not exceed 12.5.Common reduction ratios are 3/4/5/6/8/10, and the number of reduction gears usually does not exceed 3, but some large reduction ratios have four levels of customized reduction gears.Compared with other gear reducers, the planetary gear reducer has the characteristics of high rigidity, high precision (single stage less than 1 point), high transmission efficiency (single stage 97-98%), high torque/volume ratio, long life and maintenance-free, etc. Due to these characteristics, planetary reducers are mainly installed on stepper motors and servo motors to reduce speed, increase torque and match inertia. The rated input speed of planetary reducers can reach 18000 rpm (related to the size of the reducer itself , the larger the reducer, the smaller the rated input speed), its working temperature is usually about -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 back clearance class (ARC min) is very important, and the price of different back clearance classes varies greatly.The planetary reducer can be used as a multi-gearbox with a reduction ratio of 100,000.
operating parameters
The peripheral speed of the gear transmission shall not exceed 10m/s..
The input shaft speed is not higher than 1500 rpm.
The working temperature of the reducer is -40°C - +45°C.
Reducers are available for forward and reverse operation.