What are the common faults and causes of planetary gearboxes? How to maintain planetary gearboxes

Planetary reducers are often used in conjunction with servo motors and have an irreplaceable position in the mechanical equipment industry. Planetary gearbox is a precision product, so it is inevitable to encounter some faults during use. It requires more maintenance and upkeep to better extend its service life and maximize its use.

1、 What are the common faults and causes of planetary gearboxes

Planetary gearbox is a mechanical component that can reduce speed and increase torque, widely used in various equipment. We often encounter some problems when using planetary gearboxes. Below are some common problems and their causes in the use of planetary gearboxes, hoping to be helpful to everyone.

1. The motor is working normally, but the output shaft of the reducer is not rotating

Check if the locking ring between the motor shaft and the input end of the reducer is securely fastened. If the gearbox output shaft still does not rotate after being locked, the motor needs to be removed and the gearbox output end needs to be manually rotated to see if it is stuck.

2. The noise generated by the gearbox during operation is too loud

The loud noise of the gearbox is generally due to the high input speed. The input speed can be reduced by lowering the reduction ratio. In addition, the noise of helical gear reducers is smaller than that of spur gear reducers.

3. The gearbox is leaking oil

The main reason for oil leakage is the increase in internal pressure of the reducer, which is caused by the increase in temperature, that is, the high speed, and the need to reduce the input speed.

4. The bearing at the output end of the reducer is easily damaged

Usually, it is because a reducer using deep groove ball bearings is selected, and the output shaft of this reducer cannot withstand too much axial and radial force, as long-term operation can easily cause damage to the bearings. Need to choose a reducer with tapered roller bearings.

5. Gearbox shaft breakage

Shaft breakage is usually caused by excessive bending moment on the output shaft of the gearbox due to the load at the output end. It can be solved by reducing the distance between the load application point and the root of the shaft or selecting a larger gearbox.

6. The precision of the reducer decreases too quickly

The rapid decrease in accuracy is generally due to harsh working conditions, which often cause the gearbox to operate under high loads. In addition, the internal gear teeth precision is not high, so the gear wear will be faster. When selecting a gearbox, it is advisable to choose one with higher torque and preferably choose a foreign brand.

7. Why is the load torque of the reducer not proportional to the reduction ratio

Because the size of the gearbox housing is fixed, a gearbox that is too large or too small can cause the sun gear or planetary gear to be very small, resulting in a decrease in load-bearing capacity. Therefore, the closer the gear ratio is to the middle, the stronger the load-bearing capacity of the reducer.

2、 How to maintain planetary gearbox

1. Keep the body clean

During use, there may inevitably be oil stains and dust. If some debris accumulates on the surface for a long time without being cleaned, it can easily lead to corrosion of the machine body and unsafe operation of the reducer.

2. Regular inspection

It is necessary to regularly check whether the body is damaged, whether there are missing parts, or the operation of the planetary gearbox, so as to timely detect and deal with some small problems, and avoid them becoming major problems.

3. Adding lubricating oil appropriately

In theory, it is not recommended to replace the lubricating oil on the gearbox frequently, and adding lubricating oil should not be too much or too frequently, as this will affect the use of the gearbox.

4. Timely replace damaged parts

If any problems are found with the components of the planetary gearbox, the damaged parts should be replaced in a timely manner to ensure the normal operation of the gearbox.