Fault analysis of gear reducer

The gear reducer is a power transmission mechanism that uses a gear speed converter to decelerate the number of revolutions of the motor to a desired number of revolutions and obtain a device with a large torque. The gear reducer is a relatively precise machine that is used to reduce the speed and increase the torque.

To better understand your equipment, you should know where it is often faulty and how to repair it. The most common faults of gear reducers are tooth spalling, pitting, falling and broken teeth, especially at low speeds. Gears, falling blocks and broken teeth are the most frequent.

According to the analysis, the position of the gear reducer of the gear reducer is generally asymmetrical, so that the gear shaft of the low speed large gear of the gear reducer is skewed, and the center line and the center line of the gear shaft of the two pinions meshing with it are not parallel, resulting in a low speed large gear. The gear teeth of the two pinions are reduced, most of which are random fractures, mainly due to defects or excessively high residual stresses, which may be caused by inclusions, fine grinding cracks or improper heat treatment. fracture.

If the gear reducer gear fails, the primary cause may be material inclusions, rough forging problems, followed by poor quenching and carburizing processes, or other reasons for the quality of the gear itself.

From the analysis of the shape and location of the fracture, if the center line of the motor and the gear reducer are not on the same axis, in the operation, increase the eccentric load of the gear teeth. The shape of the fracture is similar to the shape of the fracture of the general fatigue fracture. The output shaft of the gear reducer produces a large diagonal tensile force, and the fatigue source, smooth or shell-like fatigue crack development zone and rough transient can be clearly observed on the fracture. Broken area.

As long as it is a production equipment, there is no need to have the friction of the equipment. In addition to better understanding the troubleshooting and maintenance methods of the fault, we need to strengthen the lubrication link of the gear reducer, reduce the friction coefficient, and further improve the life of the equipment.

In addition, the installation foundation of the gear reducer should be firm and reliable, and there must be no vibration or looseness. The fixing screws should be selected in strict accordance with relevant standards and regulations. When the input shaft and output shaft of the gear reducer are connected with the power and supporting machinery, if the coupling is connected with the coupling, the shaft and the shaft are required to be strictly centered, and there must be no dissimilarity. The use of the V-belt and the chain should not be too tight or too loose.

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