Disassembly, Inspection, Lubrication Method, and Problem Handling of WP Type Worm Gear and Worm Reducer



The input forms of worm gear reducers are divided into: hole input, shaft input, and extended worm shaft type;

1、 Form description:
The input forms of worm gear reducers are divided into: hole input, shaft input, and extended worm shaft type;
The output types of the gearbox are divided into: hole output, unidirectional shaft output, and bidirectional shaft output.
2、 Working conditions:
1. The worm speed of the worm gear reducer cannot exceed 1500r/min
2. The working environment temperature is -40 ℃ -+40 ℃. When the working environment temperature is below 0 ℃, the lubricating oil must be heated to above 0 ℃ before starting. When the working environment temperature is above 40 ℃, cooling measures must be taken.
3. The input shaft of the worm gear reducer can rotate in both positive and negative directions.
Disassembly and assembly of WP series worm gear reducer
Before disassembling, drain the oil thoroughly
Remove all the hexagonal bolts on the end covers on both sides of the output shaft (hole). (The flat key of the output shaft needs to be removed), pry up the end cover of the output shaft (hole), and take out the turbine from the other end of the output shaft (hole).
Remove all the hexagonal bolts from the end covers on both sides of the input shaft (hole). (The flat key of the input shaft needs to be removed)
Pry up the cover plate of the oil level indicator, tap the input shaft (hole) with a soft hammer, and remove the worm from the oil level indicator side.
If it is necessary to change the direction of the input shaft, disassemble the output shaft (hole), take out the worm shaft, adjust the worm to 180 ° with the cover plate on both sides, and then install it; The output is the same.
During installation, do not knock hard. Rotate the two shafts left and right to engage them, and then tighten the bolts.
During installation, the cover plate needs to be cleaned and sealed to avoid oil leakage.
3、 Common problems and solutions for worm gear reducers:
1. Heating and oil leakage
In order to improve efficiency, worm gear reducers generally use non-ferrous metal as worm gear and hard steel as worm. Because it is a Sliding friction transmission, it will generate high heat during operation, which will cause differences in thermal expansion between all parts and seals of the reducer, resulting in gaps on all mating surfaces, and oil will become thinner due to temperature rise, which is easy to cause leakage. There are four main reasons: firstly, whether the material combination is reasonable; secondly, the surface quality of the meshing friction surface; thirdly, the selection of lubricating oil and whether the amount added is correct; fourthly, the assembly quality and usage environment.
2. Worm gear wear
The worm gear is generally made of tin bronze, and the matched worm material is generally quenched with 45 steel to HRC45-55. It is also commonly quenched with 40C to HRC50-55, and ground to roughness RaO by a worm grinder When the reducer is running normally at 8 fcm, the worm is like a hardened "file" that constantly files the worm gear, causing wear and tear. Generally speaking, this type of wear and tear is very slow, and some reducers in a certain factory can be used for more than 10 years. If the wear rate is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, assembly quality, or usage environment
3. Wear of helical gears
Usually occurs on vertical mounted reducers, mainly related to the amount of lubricating oil added and the selection of lubricating oil. During vertical installation, 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 gear will not get the proper lubrication protection, start or run


Reducer,Worm gear and worm