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Worm Gear The Seal Remains Soft And Resilient
Aug 03, 2017

Worm gear reducer as a traditional transmission device, the internal turbine worm, tooth is involute. A lot of worm gear reducer users on the understanding of the worm reducer is very few, not to mention the analysis of some common problems, the following we and everyone to understand the next worm reducer common problem analysis.

First, the common problems and their causes

1. Reducer heat and oil spill. In order to improve efficiency, worm reducer are generally used to do non-ferrous metal worm, worm is used hard steel. As a result of sliding friction transmission, the operation will produce more heat, so that the reducer parts and seals between the thermal expansion of the differences, so that the formation of gaps in the mating surface, lubricating oil due to the temperature rise and thinning, easy to cause leakage The There are four main reasons for this situation, one is unreasonable material mix; Second, the surface friction of the surface quality is poor; Third, the choice of lubricating oil is not correct; Fourth, the assembly quality and the use of poor environment.

2. Worm wear. Worm gear generally used tin bronze, matching the worm material with 45 steel hardened to HRC4555, or 40Cr hardened HRC5055 after grinding by the worm grinding to roughness Ra0.8μm. Reducer normal wear and tear when the normal operation, some reducer can use more than 10 years. If the wear speed is faster, it is necessary to consider whether the selection is correct, whether the overload operation, and the worm gear material, assembly quality or use of the environment and other reasons.

3. Transmission small helical gear wear. Generally occurs in the vertical installation of the reducer, mainly with the amount of oil and oil varieties. Vertical installation, it is easy to cause insufficient oil, reducer stop running, the motor and reducer transmission gear oil loss, the gear can not be due to lubrication protection. When the gear unit is started, the gears are damaged or damaged due to lack of effective lubrication.

4. Worm bearing is damaged. In the event of failure, even if the gear box seal is good, or often found in the reducer gear oil is emulsified, bearing rust, corrosion, damage. This is because the reducer in the run for some time, the gear oil temperature rise and cooling after the condensate produced by mixing with water. Of course, also with the bearing quality and assembly process is closely related.

Second, the solution

1. Guaranteed assembly quality. Can be purchased or homemade some special tools, disassembly and installation of reducer parts, try to avoid hammer and other tools to tap; replacement gears, worms, try to use the original parts and pairs of replacement; assembly output shaft, pay attention Tolerance to use; to use anti-sticking agent or red orange oil to protect the hollow shaft, to prevent wear and tear or with the area of dirt, maintenance difficult to disassemble.

2. Selection of lubricants and additives. Worm gear reducer generally use 220 # gear oil, heavy load, start frequently, the use of poor environment reducer, can choose some lubricants additives, so that when the gear in the gear when the gear is still attached to the gear surface, the formation of protection Film, to prevent heavy load, low speed, high torque and direct contact between the metal when starting. Additives contain seal adjusters and anti-leakage agent, so that the seal to maintain a soft and flexible, effectively reduce the oil leakage.

3. Selection of the installation position of the gear unit. Position permitting, try not to use vertical installation. Vertical installation, the amount of oil added to the installation of a lot more than the level, easy to cause reducer fever and oil spills.

4. Establish a lubrication maintenance system. Can be based on the lubrication of the "five" principle of the reducer to maintain, so that each reducer are responsible for regular inspection and found that the temperature rise significantly more than 40 ℃ or oil temperature over 80 ℃, the quality of oil or oil Found more copper powder and produce abnormal noise and other phenomena, to immediately stop using, timely maintenance, troubleshooting, replacement of lubricants. When refueling, pay attention to the amount of oil to ensure that the reducer to get the correct lubrication. You can also use the gear box cleaning and maintenance machine using the gear box to the original oil drain system and filter the oil after the gear box cleaning, do not change the gear box any hardware facilities, do not add any cleaning agent to ensure the safe operation of the gear box , Extending the service life of the gearbox.