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The noise of the planetary gearbox reducer (planetary gear reducers, planetary gearboxes, planetary reducer, gear reducer) is caused by vibrations caused by force changes in bearings and bearing housings while the inner gears are running. The noise of the planetary gearbox can distinguish whether the planetary gearbox reducer is good or not. The noise of the planetary gearbox reducer should be less than 45 dB.

The noise of the planetary gearbox has a great influence on the smoothness of the planetary gear reducer, contact accuracy of the planetary gear reducer, motion accuracy, and assembly accuracy.

In this article, we’ll discuss how to cause the noice of planetary reducer and how to reduce the noise of planetary reducer.

What causes planetary gear reducer to make noise?

1.  Parameters and structural design of the gears of the planetary gear reducer on the noise: the greater the re-fit of a pair of gears in the transmission, the less the noise will be. To be sure, the smaller the fit, the greater the noise. 

2. The accuracy level of planetary reducers, and the noise value depends on the accuracy of the gear manufacturing. The higher the flank accuracy, the denser the contact marks on the meshed flank, and the less noise there is on the entire flank.

3. The impact and noise generated by the pitting of the flank: after a certain period, the transmission gear carrier running wheel often appears near the flank joint line with small pieces of metal shedding, forming pitting, planetary gearboxes is not easy to run after pitting. Increasing working noise and shock. It makes the gear transmission uneven and makes noise.

4. Gear processing error of planetary gearboxes is easy to causes noise: the main reason for noise caused by gear processing error is the gap accumulation error and profile error.

How to reduce the noise of planetary gear reducer?

1. Reduce pitch error and improve the accuracy to reduce the noise of the planetary gear reducer.

2. Correct tooth surface contact: Proper tooth profile trimming or modification to avoid tooth surface impact.

3. Increasing the rigidity of gears, housing (ring gear) and shafts will help reduce the noise of planetary gear reducer.

4. The greater the distance, the louder the impact when the gears mesh. Smaller backlash will help in reducing noise. So choose the suitable backlash can reduce the planetary reducer noise.

5. Smooth surface-finished gears to reduce the noise of planetary gear reducer.

6. Lubricant is important to reduce the noise of the planetary gear reducer. Lubricants with high viscosity tend to be less noisy.

7. A higher contact rate and larger overlap ratio will reduce noise of planetary reducer during operation. 

There are quite a few factors that affect the noise of planetary reducer produced during the operation of the gearbox or speed reducer including the gear material, backlash, tooth shape, contact ratio between meshing gears, machining precision, the smoothness of tooth surface, and running conditions. In general, higher precision gears generate smaller noise during operation.

So choosing a good brand planetary gearbox reducer is essential. RicoCNC can supply various brand planetary gearbox reducers, Bonfiglioli planetary reducer, EISELE planetary reducer, NIDEC-SHIMPO planetary reducer, APEX DYNAMICS planetary reducer, etc. Welcome your inquiry.