Common faults and causes of worm gear reducer

Common faults and causes of worm gear reducers:
1. Gearbox heating and oil leakage. In order to improve efficiency, worm gear reducers generally use non-ferrous metals as the worm gear, while the worm gear is made of harder steel. Due to the sliding friction transmission, a significant amount of heat is generated during operation, causing differences in thermal expansion between the various parts and seals of the reducer, resulting in gaps between the mating surfaces. As the temperature increases, the lubricating oil becomes thinner, which can easily lead to leakage.
2. Worm gear wear, the worm gear is generally made of tin bronze, and the matched worm material is quenched with 45 steel to HRC4555, or quenched with 40Cr to HRC5055, and then ground by a worm grinder to a roughness of Ra0.8 μ M. The wear and tear of the gearbox is slow during normal operation, and some gearboxes can be used for more than 10 years.
3. The transmission bevel gear is worn. It generally occurs on vertical mounted reducers, mainly related to the amount and type of lubricating oil added. When installed vertically, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the reducer loses, and the gears do not receive the necessary lubrication protection.
Common troubleshooting methods for worm gear reducers:
1. Ensure assembly quality. Special tools can be purchased or self-made. When disassembling and installing gearbox components, try to avoid using hammers or other tools to strike them; When replacing gears and worm gears, try to use original parts and replace them in pairs as much as possible; When assembling the output shaft, pay attention to tolerance fit; Use anti adhesive or red lead oil to protect the hollow shaft from wear, rust, or scale on the mating surface, which 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 usage environments, some lubricating oil additives can be selected to ensure that the gear oil still adheres to the gear surface when the reducer stops running, forming a protective film to prevent direct contact between metals during heavy loads, low speeds, high torques, and startup.
3. Selection of installation position for gearbox. If possible, vertical installation should be avoided as much as possible. When installed vertically, the amount of lubricating oil added is much higher than when installed horizontally, which can easily cause the gearbox to heat up and leak oil.