Common problems of worm gear reducer

The reducer is a power transmission mechanism.The governor of the gear is used to reduce the number of revolutions of the electric motor (electric motor) (gear motor) to the required number of revolutions and obtain a larger torque organization.Among the mechanisms currently used to transmit power and motion, the application scale of the reducer is appropriate and extensive.

Common issues and their contributing factors:

(1) The reducer heats up and leaks oil

(2) Worm gear wear

(3) Transmission bevel gear wear

(4) Bearing (worm) damage

1. The reducer heats up and leaks oil

In order to improve the power of the worm gear reducer, non-ferrous metals are usually used as the worm gear, and harder steel is used.Due to the sliding friction transmission, high heat will be generated during the working process, which will cause the thermal expansion between the parts of the reducer and the seal to be different, so that there will be gaps on the mating surfaces, and the oil will become thinner due to the increase in temperature, which is easy to form leakage. .

The first factor is whether the raw materials are properly prepared, the second is the surface quality of the meshing friction surface, the third is the choice of lubricating oil, whether the dosage is accurate, and the fourth is the quality of the equipment and the use environment.

2. Worm gear wear

Worm gears are usually made of tin bronze.The data of the paired worm is usually hardened to HRC45-55 with No. 45 steel.It is also commonly used to harden HRC50-55 with 40C.The worm is ground to a roughness of Ra0.8fcm by a worm grinder.When the reducer is working normally, the worm is like a hardened 'file', which keeps filing the worm gear and wears the worm gear.

Generally, this wear is slow.For example, some reducers in the factory can be used for more than 10 years.If the wear speed is fast, it is necessary to consider whether the Selection of the reducer is accurate, whether there is overload, the raw material of the worm gear, the quality of the equipment or the use environment and other factors.

3. Transmission bevel gear wear

It mostly occurs on the reducer of the vertical device, which is mainly related to the increase of lubricating oil and the selection of lubricating oil.When the vertical device is installed, it is easy to cause insufficient lubricating oil.When the reducer stops working, the transmission gear oil between the motor and the reducer will be lost, the gears will not be properly maintained, and the lack of effective smoothness will cause mechanical wear or even damage or work when starting.

4. The worm bearing is damaged

When the reducer fails, even if the gearbox is well sealed, the factory often finds that the gear oil in the reducer has been emulsified, and the bearings have been rusted, corroded, and damaged.This is because the gear oil is formed by the condensation of water after the reducer is heated and cooled during operation and shutdown; of course, it is also closely related to the quality of the bearing and the process method of the device.

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