Common problems and their causes.
(1) reducer heat and oil leakage,
(2) Worm gear wear,
(3) the transmission small helical gear is worn,
(4) The bearing (at the worm) is damaged.
1. In order to improve the efficiency of the reducer heating and oil leakage worm gear reducer, non-ferrous metal is generally used as the worm gear. Harder steel is used. Because it is a sliding friction transmission, high heat will be generated during the operation, so that The thermal expansion between the parts of the reducer and the seal produces a difference, which creates a gap on each mating surface, and the oil becomes thinner due to the increase in temperature, which easily causes leakage. There are four main reasons. One is whether the combination of materials is reasonable, the other is the surface quality of the meshing friction surface, the third is the choice of lubricant, and whether the amount is correct, and the fourth is the assembly quality and the use environment.
2. Worm gear wear The worm gear is usually tin bronze. The matched worm material is generally hardened with 45 steel to HRC45-55, and 40C: hardened HRC50-55 is also used. In normal operation, the worm is like a hardened "file", constantly rasping the worm gear, causing the worm gear to wear. Generally speaking, this kind of wear is very slow. Some reducers in a certain factory can be used for more than 10 years. If the wear speed is fast, we must consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, the quality of the assembly, or the use environment.
3. The wear of the transmission small helical gear generally occurs on the reducer installed vertically, which is mainly related to the amount of lubricant added and the choice of lubricant. In vertical installation, it is easy to cause insufficient lubricant oil quantity. When the reducer stops running, the transmission gear oil between the motor and the reducer is lost, the gears cannot get the proper lubrication protection, and they are not effective during startup or operation. Lubrication can cause mechanical wear or even damage.
4. Worm bearing damage When the gearbox fails, even if the gearbox is well sealed, the factory often finds that the gear oil in the gearbox has been emulsified and the bearings have rusted, corroded, and damaged. This is because the gearbox is in the process of being stopped. In gear oil, it is caused by the condensation of moisture generated after the heat becomes cold; of course, it is also closely related to the quality of the bearing and the assembly process.