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Selection and maintenance of planetary gear reducer

Planetary gear reducer is also called planetary reducer. 伺服电机、步进电机等传动系统中。 In the reducer family, planetary reducers are widely used in DC brushless motors, servo motors, stepper motors and other transmission systems due to their small size, high transmission efficiency, wide deceleration range, and high accuracy. Its role is to ensure the precision of the premise, mainly used to reduce the speed to increase the torque and reduce the load / motor moment of inertia ratio.

How to select a planetary reducer?

1. Planetary gear reducer is the main type of reducer matching DC brushless motor. When selecting planetary gear reducer, you must first determine the reducer reduction ratio. If the standard reducer does not have the reduction ratio you need, you can contact our company Custom reducer.

电机额定扭矩乘上减速比,得到数值原则上要小于产品型录上提供的相近减速机的额定输出扭矩,同时还要考滤其驱动电机的过载能力及实际所需要工作扭矩。 2. After determining the reduction ratio, please multiply the rated torque of your selected brushless DC motor by the reduction ratio. The value obtained is, in principle, smaller than the rated output torque of a similar reducer provided in the product catalog. The overload capacity of the motor and the actual required working torque. For the required working torque, pay attention to the second digit of the rated output torque. After meeting the above conditions, please choose a reducer with a smaller volume. The cost of a reducer with a smaller volume is relatively low.

3. The smaller the return stroke, the higher the accuracy and the higher the cost. Users only need to select a series of reducers that meet their accuracy requirements. Also consider filtering lateral / radial forces and average life. Gearboxes with large lateral / radial forces are highly reliable in installation and use, and are not prone to problems. 电机的寿命。 Usually the average life span is much longer than the life of the DC brushless motor.

In the long-term operation of the reducer, there are three types of oil leakage, such as oil leakage from the oil seal, ejection of the seal cover, and oil leakage from the ventilator. There are three main parts of oil leakage. One is leakage at the position of the gap between the extended end of the low speed shaft and the shaft hole of the bearing end cover. One is the position of the gap between the extended end of the high speed shaft and the shaft hole of the bearing end cover. Leakage; the other is leakage at the position of the joint surface of the box.

The measures we can take are:

1. Select oil seal products from regular manufacturers.

2. Adopt the correct assembly method and special oil package with tooling. When assembling a planetary gear reducer, pay attention to the correct way of applying force, choose a pad of appropriate size, and apply pressure evenly in the diagonal direction. At the same time, pay attention to ensure the level of the oil seal to ensure the effectiveness of the seal. In the selection of tooling, it should be noted that the diameter of the contact position between the tooling and the oil seal should be reasonable.

3. During the test, use a special pneumatic torque wrench to tighten the bolts.

4. Strengthen the seal design of parts.

The selection and troubleshooting of planetary gear reducers are very important. In the process of using planetary gear reducers, they need to be cleaned and maintained in time, so that they can be used for a longer period of time and can be less frequent in the life of planetary gear reducers malfunction.

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