The reducer is a power transmission mechanism that uses a gear speed converter to decelerate the number of revolutions of the motor (motor) to a desired number of revolutions and obtain a mechanism for a large torque. In the current mechanisms for transmitting power and motion, the range of applications of the reducer is quite extensive. Let Xiaobian take you to understand the common problems of worm gear reducer and its causes:
(1) Reducer heat and oil leakage
(2) Worm gear wear
(3) Drive small helical gear wear
(4) Damage to the bearing (worm)
1. Reducer heat and oil leakage
In order to improve the efficiency, the worm gear reducer generally adopts non-ferrous metal as the worm wheel and adopts hard steel. Because it is a sliding friction transmission, during operation, it will generate higher heat, which will make the parts between the reducer and the seal. The difference in thermal expansion causes a gap to occur in each mating surface, and the oil becomes thinner due to an increase in temperature, which is liable to cause leakage.
The main reasons are four points. One is whether the material is reasonable. The second is the surface quality of the meshed friction surface. The third is the choice of lubricating oil. The addition amount is correct. The fourth is the assembly quality and the use environment.
2, worm gear wear
The worm gear is generally made of tin bronze. The paired worm material is generally hardened with 45 steel to HRC45-55. It is also commonly used 40C: hardened HRC50-55, ground to the roughness RaO.8fcm by the worm grinder, and the worm is in normal operation of the reducer. Just like a hardened "sickle", the worm gear is continuously cut and the worm wheel is worn.
In general, this wear is very slow, like some reducers in a factory can be used for more than 10 years. If the wear speed is faster, it is necessary to consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, the assembly quality or the use environment.
3, transmission small helical gear wear
It usually occurs on a vertical mounted reducer, mainly related to the amount of lubricant added and the choice of lubricant. When the vertical installation is installed, it is easy to cause insufficient oil quantity. When the speed reducer stops running, the transmission gear oil between the motor and the reducer will be lost, the gear will not get the proper lubrication protection, and it will not be effective during startup or operation. Lubrication causes mechanical wear and even damage.
4, the worm bearing is damaged
When the reducer fails, even if the gearbox is well sealed, the factory often finds that the gear oil in the reducer has been emulsified, the bearing has been rusted, corroded and damaged. This is because the gear oil is used during the stop and stop of the gear reducer. The condensation of moisture generated after the heat is cooled; of course, it is also closely related to the bearing quality and assembly process.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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