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Working principle of screw vacuum pump

To better use the screw vacuum pump, its working principle is very necessary to understand, in order to help you better understand the screw vacuum pump.


When the screw vacuum pump is running, under the drive of the motor, the piston in the cylinder is reciprocated by the action of the crank link mechanism (the rotary motion is transformed into a straight line). When the piston within the cylinder when the movement from left to right, because the left cavity of the cylinder volume increasing, reduce the pressure of the left cavity space constant, when the pressure inside the left cavity space is less than the pressure of the pump container, according to the principle of balance of gas pressure, gas is pumped container through the suction valve are constantly pumping into the left cavity, is in the process of suction.

screw vacuum pump.jpg

When the piston reaches the right position, the left cavity of the cylinder is filled with gas. Then the piston moves from the right to the left, and the suction valve closes automatically. The gas is gradually compressed as the piston moves from right to left. When the gas in the cylinder reaches the exhaust pressure, the exhaust valve is opened, the gas is discharged, and a working cycle is completed. When the piston moves from the left to the right, repeat the above cycle until the container reaches a certain equilibrium pressure.


In screw vacuum pump, the suction valve and exhaust valve is a very important component and is vulnerable parts of their work is good or bad directly affect the limit pressure reciprocating pump, extraction rate, power consumption and reliability of operation.

LG Screw Vacuum Pump.jpg


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