Issue 47: features of Hengyu Guoqiang reducer servo planetary reducer
Time：2018-08-04 | Source：恒宇国强 | Browse：1160640
The main transmission structure of planetary reducer is planetary gear, sun gear and outer gear ring
Because of the structure of planetary reducer, the minimum single-stage deceleration is 3, and the maximum is generally not more than 10. The common reduction ratio is 3.4.5.6.8.10, and the number of reducer stages is generally not more than 3. However, some customized reducers with large reduction ratio have 4-stage deceleration
Compared with other reducers, planetary reducers have the characteristics of high rigidity, high precision (single stage can be less than 1 point), high transmission efficiency (single stage can be 97% - 98%), high torque / volume ratio, life-long maintenance free, etc
Because of these characteristics, planetary reducers are mostly installed on stepper motor and servo motor to reduce speed, improve torque and match inertia
The maximum rated input speed of the reducer can reach 18000rpm (related to the size of the reducer, the larger the reducer, the smaller the rated input speed). The output torque of the industrial planetary reducer is generally not more than 2000Nm, and the specially made super large torque planetary reducer can achieve more than 10000nm. The working temperature is generally about - 25 ℃ to 100 ℃. The working temperature can be changed by changing the grease
Several concepts about planetary reducer
Series: the number of planetary gear sets. As a set of star gear can not meet the larger transmission ratio, sometimes two or three sets are needed to meet the requirements of larger transmission ratio. As the number of star gears is increased, the length of two or three-stage reducer will increase and the efficiency will decrease
Return clearance: when the output end is fixed and the input end rotates clockwise and anticlockwise to produce the rated torque + - 2% at the input end, there is a small angular displacement at the input end of the reducer. This angular displacement is the return clearance. The unit is "minute", which is one of sixty parts of one degree. It is also called back clearance
Planetary reducer is a kind of widely used industrial products, its performance can be comparable with other military grade reducer products, but it has the price of industrial grade products, and is used in a wide range of industrial occasions.
The reducer has the advantages of small volume, light weight, high bearing capacity, long service life, stable operation and low noise. It has the characteristics of power split and multi tooth meshing. The maximum input power is 104kw. It is suitable for WGN fixed shaft drive reducer, WN gear drive reducer and elastic load less tooth difference reducer of planetary Series in industrial departments such as lifting and transportation, engineering machinery, metallurgy, mining, petrochemical industry, construction machinery, light industry and textile, medical instruments, instruments, automobiles, ships, weapons and aerospace.
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