Features of planetary reducer

Due to the structure of the planetary reducer, the single-stage reduction is generally 3 to 10. The common reduction ratios are: 3, 4, 5, 6, 8, and 10. The number of reducer stages generally does not exceed 3, but some large reduction ratios are customized for reduction. The machine has 4 levels of deceleration.

         Compared with other reducers, planetary reducers have the characteristics of high rigidity, high precision (within 1 minute for a single stage), high transmission power (97%-98% for a single stage), high torque/volume ratio, maintenance-free, etc. .

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 reducer can reach 18000rpm (related to the size of the reducer itself, the larger the reducer, the smaller the rated input speed), the output torque of the industrial-grade planetary reducer generally does not exceed 2000Nm, and the special super-torque planetary reducer can achieve Above 10000Nm. The working temperature is generally around -25°C to 100°C, and the working temperature can be changed by changing the grease.

        Several concepts about planetary reducer:

        Number of stages: the number of sets of planetary gears. Since a set of star gears cannot meet a larger transmission ratio, sometimes 2 or 3 sets are required to meet the requirements of supporting a larger transmission ratio. Due to the increase in the number of star gears, the length of the 2- or 3-stage reducer will increase and the power will decrease.

        Return clearance: When the output end is fixed, the input end rotates clockwise and counterclockwise, so that when additional torque +-2% torque occurs at the input end, there is a slight angular displacement at the input end of the reducer, and this angular displacement is the return clearance. The unit is "cent", which is one-sixtieth of a degree, and some people call it backlash. Planetary reducer is a widely used industrial product. Its performance is comparable to other military-grade reducer products, but it has the price of industrial-grade products and is used in a wide range of industrial occasions.