How to effectively solve - rotary-vane vacuum pump failure

mounted eccentrically in rotary vane vacuum pump rotor and stator fixed surface tangent, and two ( Or more) The groove of the rotary vane in the rotor sliding ( Usually the radial) And come in contact with the wall of the stator in order to rotate the variable volume pump chamber into several vacuum pump variable volume. Usually, rotary vane pump chamber and the clearance between oil seal, therefore rotary-vane vacuum pump are usually mechanical vacuum water pump oil seal type. If rotary-vane vacuum pump operation is not normal, often appear fault, such as rotary vane vacuum pump vacuum degree decline, fuel injection, smoke, oil seal leakage, noise, etc. And vacuum pump oil emulsion in the pump, etc. In this case, first of all, don't panic, shutdown to eliminate them one by one. Here are a few troubleshooting methods.

a, the smoke and rotary vane vacuum pump oil: refers to the operation of the smoke from the rotary-vane vacuum pump outlet or injection.

1, smoking, smoking if the pump just started running the phenomenon, belongs to the normal, if smoking for a long time is not normal.

the solution: smoke said repair outside the water pump suction pipe, valve and container. After the leak detection, the smoke will disappear. Vortex flow

2, fuel injection means intake outlets have a lot of leakage points, even the air intake is exposed to the atmosphere.

the solution: seal the air inlet of the pump, pump running. If there is no injection oil, there is a leak. Exhaust valve damage, check whether the exhaust valve piece is damaged, replacement of damaged exhaust valve.

the noise of the rotary-vane vacuum pump are: here refers to the noise of the pump.

1, knocking, irregular noise when pump is running, like the sound of metal banging on metal. This is the voice of a rotor pump body impact. This situation mainly by paired rotary plate spring break or contraction or pop-up caused failure.

the solution: open the pump, check whether the helical spring is damaged. Replace the spring.

2, noise, exhaust valve mainly pump exhaust valve damage.

the solution: replace the good exhaust valve.

three, rotary vane vacuum pump vacuum decline:

refers to the current measured rotary-vane vacuum pump or before using the vacuum degree of vacuum degree is lower than the factory indicators. There are many reasons for low vacuum degree. Here are some main conditions.

1, the adding of rotary-vane vacuum pump oil brand is different from original factory. Different levels of vacuum pump oil because of the different grades of oil saturation vapor pressure is different, the result is also different.

solution: according to the product's type and specification to replace the right new vacuum pump oil.

2. In addition, caused by the vacuum pump oil vacuum degree is low, namely vacuum pump oil was emulsified and discoloration, or too dirty.

the solution: all of the vacuum pump oil drain pump, the replacement of the same type vacuum pump oil, solve did not enter inside the pump is pumping water vapor in the gas and impurities.

3, pumping gas temperature may be too high.

solution: reduce pumping gas temperature or increase the corresponding heat exchanger.

4, inside the pump oil blockage or poor, no reserve a certain amount of oil pump cavity.

the solution: check whether the oil is flowing, and add the same type of vacuum pump oil.

5, increase coordination gap. This is because the long-term pumping gas containing dust, lead to rotate the clearance between stator and increase after the wear and tear.

the solution: check whether the gap is too big, and replace the new parts.

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