Common Fault Analysis of Hard Gear Reducer (Four Series)

Release Time：

2024-10-31

What are the reasons for pitting and peeling of gearbox gears Material, hardness, and defects. The material of the gear does not meet the requirements; The main factor affecting the contact fatigue strength of gears is the low hardness after heat treatment, which cannot guarantee the expected contact fatigue strength of gears. In addition, defects on the surface or inside of the teeth are also one of the reasons for insufficient contact fatigue strength. Poor gear accuracy. The precision of gear processing and assembly does not meet the requirements, such as poor meshing accuracy and motion accuracy. The center distance error of the shell of the circular arc gear is too large. The lubricating oil does not meet the requirements. The brand of lubricating oil

A reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of rotations of a motor to the desired number and obtain a larger torque.

What are the reasons for pitting and peeling of gearbox gears

Material, hardness, and defects. The material of the gear does not meet the requirements; The main factor affecting the contact fatigue strength of gears is the low hardness after heat treatment, which cannot guarantee the expected contact fatigue strength of gears. In addition, defects on the surface or inside of the teeth are also one of the reasons for insufficient contact fatigue strength.

Poor gear accuracy. The precision of gear processing and assembly does not meet the requirements, such as poor meshing accuracy and motion accuracy. The center distance error of the shell of the circular arc gear is too large.

The lubricating oil does not meet the requirements. The brand of lubricating oil used is incorrect, the viscosity of the oil is low, and the lubrication performance is poor.

The oil level is too high. If the oil level is too high, the temperature of the oil will increase, reducing the viscosity of the lubricating oil, damaging the lubrication performance, and reducing the working thickness of the oil film.

The reason for the serial axis of the reducer

It is caused by the loose fastening between the driven gear on the intermediate shaft and the shaft. In actual transmission, due to insufficient interference between the driven gear and the intermediate shaft, the driven gear undergoes axial displacement relative to the intermediate shaft, which in turn causes axial displacement of the input shaft. Therefore, insufficient interference fit is the main reason for the gearbox shaft misalignment.

The reason for the high temperature of the reducer oil

The lubricating oil is unqualified or has been used for too long.

Excessive lubricating oil is not conducive to the heat dissipation of the mechanism inside the gearbox.

Mechanical damage. Mechanical damage includes severe gear pitting, tooth breakage, damage to bearing cages, inner and outer rings, ball bearings, as well as severe bearing locking or shaft deformation;

The exterior of the box is covered with debris or dust. When there are things piled up around the reducer or the surface of the machine body is not cleaned for a long time, it is possible that incomplete heat dissipation of the reducer may occur due to the coverage of debris or dust, resulting in an increase in oil temperature;

The cooling device is blocked or malfunctioning. The cooling device, like the gearbox, is placed in a dusty factory building. If the internal pipelines are not cleaned for a long time and the cooling device is blocked or broken, it will cause the gearbox oil temperature to rise;