Frequently Asked Questions about Worm Gear Reducer!

The worm gear reducer is a power transmission structure that uses a speed converter of a transmission gear to reduce the number of revolutions of the motor (motor) to the required number of revolutions and obtain a larger torque.In organizations currently used to transmit power and motion, reducers are used in a wide range of areas.

Worms, like threads, can be divided into right-hand and left-hand, which are called right-hand worm and left-hand worm respectively.If there is only one worm-like line on the worm, it is called a double-headed worm, that is, the worm rotates once, and the worm gear turns one tooth when the worm is pressurized. If there are two worm-like lines on the worm, it is called a multi-head worm, that is, the worm rotates once. The worm gear is supercharged and rotates 2 teeth.

1. Common problems and causes

1. Reducer heats up and leaks oil

In order to improve work efficiency, worm gear reducers generally use rare metals as worm gears, and the worm gears use harder stainless steel. Since it is a rolling friction transmission system, it will cause higher friction during operation. The heat generated by the reducer causes thermal deformation of the various parts of the reducer and the sealing center to form gaps, and the hydraulic oil becomes thicker due to the increase in temperature, which can easily lead to leakage.There are four main reasons leading to this situation: first, the combination of materials is unscientific, second, the surface quality of the gear friction surface is poor, third, the selection of the amount of grease is wrong, and fourth, the installation quality and the use environment are poor. .

2. Worm gear and worm wear

The worm gear is generally made of tin bronze, and the matching worm material is usually 45 steel hardened to HRC45-55. 40C hardened HRC50-55 is also commonly used. It is cut by a worm CNC grinder to a surface roughness of RaO.8fcm, and all reducers During normal operation, the worm rod is like a hardened 'knife', constantly filing the worm gear, causing damage to the worm gear.Generally speaking, this kind of damage is relatively slow. Some reducers in a certain factory can be used for more than ten years.If the damage rate is faster, you need to consider whether the type of reducer is selected appropriately, whether there is overload operation, the material of the worm gear, the installation quality or the natural environment of use, etc.

3. Wear of transmission pinion gear

It generally occurs on column-mounted reducers, and is mainly related to the amount of grease and the type of refined oil.When installed in a column, it is very easy to cause insufficient grease. When the reducer stops running, the gear oil of the transmission system between the motor and the reducer flows out, and the transmission gear cannot get the lubrication and maintenance it should have.When the reducer is operating, the transmission gear cannot be properly lubricated, causing damage to the mechanical equipment or even destruction.

4. Worm bearing damage

When a fault occurs, even if the reducer has good sealing, it is often found that the gear oil in the reducer is emulsified and the bearings are rusted, corroded, or damaged.This is because after the reducer has been operating for a period of time, the gear oil temperature is high and the condensed water formed after cooling mixes with the water.Naturally, it is also closely related to the quality of rolling bearings and machining technology.