What is a planetary reducer?

What is a planetary reducer ? What does the planetary reducer mean?

The planet is an industrial transmission designed to increase the output torque of the system by reducing the speed. The main transmission structure of the planetary reducer is: planetary gear, sun gear, outer ring gear.

Due to structural reasons, the planetary reducer has a minimum of 3 for single-stage deceleration and a maximum of 10 for maximum. The common reduction ratio is 3.4.5.6.8.10, and the number of reducers is generally not more than 3, but there are some large reduction ratios. 4 levels of deceleration.

Compared with other reducers, the planetary reducer has high rigidity, high precision (single level can be less than 1 minute), high transmission efficiency (single stage is 97%-98%), high torque/volume ratio, lifetime maintenance free, etc. Features.

Because of these characteristics, planetary reducers are mostly installed on stepper motors and servo motors to reduce the speed, increase the torque, and match the inertia.

The rated input speed of the reducer can reach up to 18000 rpm (depending on the size of the reducer itself, the larger the reducer is, the smaller the rated input speed is). The output torque of the industrial grade planetary reducer is generally not more than 2000Nm. The special super-torque planetary reducer can do To 10,000 Nm or more. The working temperature is generally between -25 ° C and 100 ° C. The operating temperature can be changed by changing the grease.

Several concepts about planetary reducers:

Series : The number of sets of planetary gears. Since a set of star gears cannot meet a large gear ratio, sometimes two or three sets are required to meet the requirements of a larger gear ratio. Due to the increase in the number of star gears, the length of the 2 or 3 speed reducer will increase and the efficiency will decrease.

Return gap : The output end is fixed, the input end rotates clockwise and counterclockwise, so that the input end produces the rated torque +-2% torque, the input end of the reducer has a slight angular displacement, which is the return gap. The unit is "point", which is one-sixtieth of a degree, and some people call it backlash.

The planetary reducer is a versatile industrial product that is comparable in performance to other military grade reducer products, but has the price of industrial grade products and is used in a wide range of industrial applications.

The reducer is small in size, light in weight, high in carrying capacity, long in service life, stable in operation, and low in noise. It has the characteristics of power splitting and multi-tooth meshing. The maximum input power is up to 104kW. Suitable for lifting, transportation, engineering machinery, metallurgy, mining, petrochemical, construction machinery, light industrial textiles, medical equipment, instrumentation, automotive, marine, weapons and aerospace industries, a new series of planetary series WGN fixed shaft transmission reducer , WN sub-mother gear transmission reducer, elastic load-carrying gear reducer.

The planetary reducer is a new type of reducer with wide versatility. The internal gear adopts 20CvMnT carburizing and grinding. The whole machine has the characteristics of small structure size, large output torque, high speed ratio, high efficiency, safe and reliable performance. This machine is mainly used for the slewing mechanism of tower cranes, and can also be used as supporting components for lifting, digging, transportation, construction and other industries.

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