Why does the pressure in the reducer oil tank increase?
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The interior of the reducer oil tank is a closed system, and the heat generated in it comes from the friction at the points where the gears meet. Boyle’s law, which is applied in such situations, tells us that as operation time increases, the temperature inside the reducer rises. However, the volume of the reducer tank remains constant and does not change, which leads to a continuous increase in temperature and, accordingly, in pressure. The rising pressure causes the oil inside the tank to splash due to the high temperature; if the sealing around the tank is poor, splashing noises will occur. When the pressure inside the gearbox housing increases and the temperature rises, problems arise.
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Some gearboxes have exhaust ports, while others are lubricated via oil stations; the pressure in the gearbox does not keep rising, nor does the temperature keep increasing.
Ensure proper degassing. First, the gear oil tank should be equipped with a vent pipe; if it is not present, one can be added. Second, enhance the degassing of the lubricating oil tank by adding a mist exhaust fan.
Generally, such fuel tanks have exhaust pipes, as well as water and other cooling systems to cool the oil
The reducer of the coal grinder is lubricated by its own lubricating oil, and it is equipped with an oil cooler to lower the oil temperature.
Large units are all equipped with exhaust fans.
It’s probably caused by the atomization of the lubricating oil; the volume has increased
If there are no vent holes, the temperature inside the reducer chamber rises and the pressure increases. However, reducers designed for use in the market today generally come equipped with ventilation caps, as reducer manufacturers do not want the temperature inside the chamber to rise; otherwise, this can damage the seals and the properties of the lubricating oil, and it can even affect the performance of the gears inside the gearbox! So there is a vented cap, which prevents high pressure; only the temperature of the reducer will rise a bit