What are the common problems and solutions for worm gear reducers?

Worm gear reducer is a compact mechanical transmission device with a large transmission ratio and self-locking function under certain conditions. It is one of the emerging and most commonly used reducers.

Worm gear reducers are also one of the main products of HeZong Heavy Industry. HeZong Heavy Industry and relevant universities have jointly developed the first domestic toroidal worm gear accuracy tester, and conducted systematic research on the design, process, production assembly, and testing methods of worm gear reducers. The research results are in an advanced position both domestically and internationally.

The research and production of worm gear reducers is currently a key focus of HeZong Heavy Industry. So, what are the common problems that occur during the operation of worm gear reducers? How should these issues be addressed?

Worm gear reducer overheating and oil leakage

The worm gear reducer adopts sliding friction transmission. During the meshing process of the worm gear and worm, especially during overload operation, the increase in friction will cause the temperature to rise, resulting in differences in thermal expansion between the various parts and seals of the worm gear reducer, thus creating gaps on the mating surfaces. The oil becomes thinner due to the increase in temperature, which can easily cause leakage.

In addition, aging seals, improper installation, or damage to the housing can also cause oil leakage in worm gear reducers.

Solution: It is recommended to choose a worm gear reducer from a reputable manufacturer before purchasing, which can ensure good surface quality of the meshing friction surface of the worm gear reducer; It is also recommended to pay attention to the selection of lubricating oil and regularly add or replace lubricating oil according to the manufacturer's instructions; In addition, the working condition of the worm gear reducer should be regularly checked to ensure that its load does not exceed the rated value, and aging sealing rings, gaskets, and other sealing components should be checked and replaced in a timely manner to ensure good sealing effect.

Worm gear wear

In worm gear reducers, the worm gear is generally made of high-performance alloy bronze, and the paired worm material is usually quenched to a tooth surface hardness of HRC58~62. Sometimes the worm gear is also made of tin bronze, and the matched worm material is generally quenched to HRC45-55 with 45 steel, or quenched to HRC50-55 with 40Cr worm material.

When the worm gear reducer is running normally, the worm gear is like a hardened "file", constantly filing the worm gear, causing wear and tear on the worm gear. Generally speaking, this type of wear is very slow, and most reducers can be used for more than 10 years.

If the wear rate of the worm gear is fast, it may be due to improper selection of the reducer, overloading, or poor material, assembly quality, or usage environment of the worm gear, which may seriously affect the efficiency and stability of the entire transmission system.

Solution: It is recommended to consider manufacturers of reducers that use excellent wear-resistant worm gears before purchasing, such as using high hardness alloy steel or high-performance alloy bronze as the material for worm gears; It is recommended to ensure the use of high-quality lubricating oil and replace it according to the manufacturer's recommended time intervals to reduce wear and tear; In addition, it is recommended to regularly check the meshing of the worm gear to ensure that there is no deviation or misalignment. If any abnormalities are found, they should be adjusted or repaired in a timely manner.

Worm bearing damaged

When the worm gear reducer malfunctions, even if the gearbox is well sealed, it will still be found that the gear oil inside the reducer has been emulsified, and the bearings have rusted, corroded, and damaged.

Damage to worm bearings not only affects the normal operation of worm gear reducers, but may also cause more serious malfunctions. There are various reasons for bearing damage, including but not limited to improper installation, insufficient lubrication, overload operation, and external impurities entering the interior of the bearing.

Solution: It is recommended to strictly follow the operating procedures during the installation process to ensure that all components are correctly installed and aligned, avoiding unnecessary mechanical stress concentration. When assembling the output shaft, attention should be paid to tolerance fit to ensure assembly quality; It is recommended to regularly check the condition of the lubricating oil to ensure its cleanliness and absence of impurities, and to replenish or replace it as needed; When replacing gears, worm gears, or damaged bearings, try to use original factory parts as much as possible.