Temperature requirements of rotary vane vacuum pump

We believe that we all know the working principle of the rotary vane vacuum pump. But the temperature of the rotary vane vacuum pump is too high. It means that the maximum oil temperature measured near the low-level exhaust valve exceeds the value specified in the operation manual. Rotary vane vacuum pump is generally used at room temperature of no less than 5 and relative temperature of no more than 90%. The gas enters the high vacuum chamber from the intake nozzle. At first, the high pressure is strong. The high and low vacuum chambers are full of atmosphere. Both exhaust valves are opened for exhaust. With the progress of air extraction, the air pressure drops (i.e. the vacuum degree increases), the pressure of high vacuum chamber is not enough to push the exhaust valve, and the gas enters the low vacuum chamber through the middle diaphragm. At this time, the pressure is not enough to push the exhaust valve, but there is a certain amount of oil in the low vacuum chamber, which helps to push the exhaust valve, and the gas is also discharged. The discharged gas is mixed with oil particles, which are filtered by the oil screen to separate the oil. Only the gas is discharged out of the pump.

The oil in the oil seal chamber of the rotary vane vacuum pump is supplied by the oil pool A through the hole on the front plate. The oil in the low vacuum chamber is supplied by the oil pool a through the hole on the rear end plate. The oil in the high vacuum chamber is supplied circularly by the holes in the middle diaphragm. The oil in the oil seal chamber of the rotary vane vacuum pump is supplied by the oil pool a through the hole on the front end plate. The oil in the low vacuum chamber is supplied by the oil pool a through the hole on the rear end plate. The oil in the high vacuum chamber is supplied circularly by the holes in the middle diaphragm. The sealing of the front and rear end covers of the rotary vane vacuum pump is that the oil pool B on the upper part of the pump body flows into the oil groove through the hole of the end face chamber of the pump body for sealing.

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