What to do if there is a problem with the worm reducer

Summary:What should I do if there is a problem with the worm gear reducer? What is the solution? The worm re...

What should I do if there is a problem with the worm gear reducer? What is the solution? The worm reducer is a transmission mechanism with compact structure, large transmission ratio, and self-locking function under certain conditions. It is one of the commonly used reducers.
The main problems at work are:
1. The reducer heats up and leaks oil. In order to improve the efficiency of the worm gear reducer, non-ferrous metals are generally used as the worm gear, and the worm is made of harder steel. Because it is a sliding friction transmission, it will generate higher heat during operation, which makes the parts and seals of the reducer There is a difference in thermal expansion between them, which creates a gap in each mating surface, and the oil becomes thinner due to the increase in temperature, which is easy to cause 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 lubricating oil, whether the amount of addition is correct, and the fourth is the assembly quality and use environment.
2. Worm gear wear. The worm wheel is generally made of tin bronze, and the matched worm material is generally hardened with 45 steel to HRC45-55, and 40C: hardened HRC50-55 is commonly used, and it is ground to a roughness of RaO. 8 fcm by a worm grinder. When the reducer is in normal operation, The worm is like a hardened "file" that keeps filing the worm wheel, causing wear and tear on the worm wheel. Generally speaking, this kind of wear is very slow, like 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, the assembly quality or the use environment and other reasons.

1. Ensure assembly quality. In order to ensure the quality of assembly, the factory purchased and made some special tools. When disassembling and installing the worm gear, worm, bearing, gear and other parts of the reducer, try to avoid direct hitting with hammers and other tools; when replacing gears, worm gears, and worms, try your best Choose original parts and replace in pairs; when assembling the output shaft, pay attention to the tolerances, D≤50mm, use H7/k6, D>50mm, use H7/m6, and use anti-sticking agent or red lead oil to protect the hollow The shaft prevents wear and rust, prevents the mating area from being dirty, and is difficult to disassemble during maintenance.
2. Selection of lubricating oil and additives. Worm gear reducers generally use 220 # gear oil. For reducers with heavy loads, frequent starts, and poor use environments, the factory also selects some lubricating oil additives (such as Anji Chemical Company’s good). When the operation is stopped, the gear oil is still attached to the gear surface to form a protective film to prevent heavy load, low speed, high torque, and metal-to-metal contact during startup. The additives also contain seal ring regulator and anti-leakage agent to keep the seal ring soft and elastic and effectively reduce lubricating oil leakage.

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