Improvement of oil circulation structure of rotary vacuum pump

Based on rotary vane vacuum pump oil seal type something in industry application, makes the general rotary vane vacuum pump oil seal type medium vulnerable to pollution, emulsification and failure, still can cause oil hole plugging and exhaust valve damage, resulting in waste of oil pump, pump maintenance rate increased pump damage, even cause significant cost burden to users. If switch to other types of vacuum pump, such as slide valve pump, water ring pump, oil ring pump or dry pump, or the same results, or the performance can not meet the requirements or the cost can not afford. In view of the above situation, the oil circulation structure of the general oil-sealed rotary vane vacuum pump has been greatly improved.

The oil of the existing general oil-seal rotary vacuum pump is discharged from the exhaust valve and then directly enters the pump chamber again. When the pump stops, the oil is easy to return into the pump chamber, causing the next start difficulty and oil road blockage, especially when the oil is directly into the pump chamber after being polluted by the pumping medium, this situation is even more serious. Moreover, the direct participation of contaminated oil in the work will also affect the performance of the pump. For this reason, we have made significant improvements in the oil cycle structure. The improved oil will work along the following lines:
Oil and pumped medium → exhaust valve → small oil tank → separated exhaust cap → main oil tube → return oil tube → auxiliary oil tank → filter → valve → oil inlet → oil separator → end cover, pump chamber

When the pumped medium and oil discharged from the exhaust valve pass through the separated exhaust cap, the gas and part of the steam are discharged from the exhaust port. After dust, impurities and contaminated oil sink to the bottom of the main oil tank, they flow into the auxiliary oil tank through the return pipe. After separation, precipitation, emulsified oil, water, dust and impurities sank to the bottom of the drop tank by the discharge valve regularly out, and relatively clean oil is set in the upper part of the drop tank filter filter into the valve and pump linkage, and then through the oil inlet pipe into the oil distribution chamber after the supply end cover and pump chamber work. Linkage between the valve and the pump, that is, when the pump is working, the valve starts and the oil junction opens the inflation port and closes. When the pump is stopped, the valve oil junction is closed, and the air inlet is opened. The atmosphere from the air inlet through the oil inlet pipe is inflated into the pump chamber, which destroys the vacuum in the pump chamber and makes the pump oil unable to enter the pump chamber.
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