Worm gear reducer is a kind of transmission machinery with compact structure, large transmission ratio, and self-locking function under certain conditions. It is one of the most commonly used reducers. Among them, the hollow shaft worm gear reducer not only has the above Features, and easy installation, reasonable structure, more and more widely used. The hollow shaft worm gear reducer is equipped with a helical gear reducer at the input end of the worm gear reducer, and the multi-stage reducer formed can obtain a very low output speed.
The first-stage worm gear reducer has higher efficiency. Moreover, the vibration is small, the noise is low, and the energy consumption is low. In order to improve the efficiency of the worm gear reducer, reducer manufacturers generally use non-ferrous metals as the worm wheel, and the worm uses harder steel. Because it is a sliding friction transmission, it will generate high heat during operation, so that the reducer will Differences in thermal expansion between parts and seals create gaps at each mating surface, and the oil becomes thinner due to temperature rise, easily causing leakage.
There are four main reasons, one is whether the matching of materials is reasonable, the other is the surface quality of the meshing friction surface, the third is the choice of lubricating oil, whether the amount added is correct, the fourth is the assembly quality and the use environment. The worm wheel is generally made of tin bronze, and the matching worm material is generally hardened with 45 steel to HRC45-55, and 40C is commonly used: hardened HRC50-55, and ground to a roughness of Ra0.8fcm by a worm grinder. When the reducer is in normal operation, the worm Just like a hardened "file", it keeps filing the worm gear, causing the worm gear to wear out. Generally speaking, this kind of wear is very slow.
For example, some reducers in a certain factory can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the selection of WPWX155,WPWX175,WPWX200,WPWX250,WPWDX40 the reducer is correct, whether there is overload operation, the material of the worm gear, the assembly quality or the use environment and other reasons. It usually occurs on a vertically installed reducer, mainly related to the amount of lubricating oil added and the choice of lubricating oil. When the vertical installation is installed, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the reducer will be lost, and the gears will not be properly lubricated. Lubrication causes mechanical wear and even damage. When the reducer fails, even if the reducer is well sealed, it is often found that the gear oil in the reducer has been emulsified, and the bearings have been rusted, corroded, and damaged. It is caused by moisture condensation after cooling; of course, it is also closely related to the quality of the bearing and the assembly process.
