What Are The Reasons And Countermeasures For The Oil Leakage Of The Reducer?
1. Reason analysis:
There are many ways of oil leakage in the reducer, but the most common one is the oil leakage at the seals of the driving and driven shaft heads, especially the oil leakage at the sealing ring of the driving shaft. In addition to the above cases, there are the following 3 oil leakage locations.
a. Oil leakage along the box surface of the reducer;
b. Oil leakage along the sight hole cover above the reducer;
c. Oil leakage along the oil drain hole at the bottom of the reducer;
Oil leakage at the sight hole cover and the oil drain hole is mainly caused by the fixing bolts are not fully tightened or the sealing gasket is not installed.
When assembling the box for individual reducers, there are iron filings on the box surface, which makes the box surface not tight and leaks oil. In addition to the above-mentioned factors, the reason for oil leakage on the sealing surface is that the housing of the reducer is deformed after a period of use, causing the sealing surface to be uneven and not tightly fitted, resulting in oil leakage.
Countermeasures and elimination methods:
a. The sealing ring gland adopts an easy-to-detach structure.
b. The sealing ring adopts an open structure.
c. The oil return hole at the input shaft bearing should be appropriately enlarged.
d. The aging treatment of the reducer housing can prevent deformation of the housing and avoid oil leakage along the box surface. There are currently three aging methods, one is natural failure; the other is artificial aging; the third is vibration aging. Can be selected and processed according to actual conditions.
e. An annular oil groove is cast or processed on the joint box surface of the reducer base, and there are multiple oil return holes communicating with the annular oil groove. When the reducer is working, once oil penetrates into the joint box surface, it will enter the annular oil groove, and then flow into the oil tank through the oil return hole, and the lubricating oil will not leak out of the reducer housing along the box surface.
f. When assembling the reducer, apply a layer of sealant (such as D05 silicone rubber sealant) on the box joint surface to effectively prevent oil leakage at the box joint surface.
g. Excessive oil level of the reducer will not only increase the power loss of the gear agitating oil, the splash of lubricating oil will increase the chance of oil leakage, but also cause the oil temperature to rise, especially in summer, when the ambient temperature is high, it will increase the oil temperature and lubricate. Decrease in oil viscosity, reduce lubrication performance, increase oil fluidity and leakage, directly affect the lubrication of gears and bearings, and reduce service life. For this reason, the normal oil level must be maintained during use.
h. Install gaskets at the sight hole cover and the oil drain hole, and tighten the bolts.
l. Enlarge the oil return hole of the output shaft to prevent oil leakage from the output shaft.
j. Improve the ventilation cap and inspection hole cover. The internal pressure of the reducer is greater than the external atmospheric pressure is one of the main reasons for oil leakage. If you try to balance the internal and external pressures, the oil leakage can be prevented. Although the reducer has a vent cap, the vent hole is too small and it is easy to be blocked by dust and oil. And every time you refuel, you must open the inspection hole cover. Once you open it, you will increase the possibility of oil leakage. Leaks also occurred. The vent holes can be enlarged to equalize the pressure inside and outside.
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