Dry screw vacuum pump，It's using a pair of screws，An aspirating and venting device that performs synchronous high-speed reverse rotation in a pump housing，The two screws are calibrated by fine dynamic balance，Supported by bearing，Installed in the pump housing，There is a certain gap between the screw and the screw，So when the pump works，No friction between each other，Smooth running，Low noise，The working chamber requires no lubricating oil。

Dry screw vacuum pump performance characteristics:

1, there is no medium in the working chamber, and clean vacuum can be obtained

2, a single pump can be pumped from the atmosphere to 1Pa, the vacuum system can be greatly simplified。

3, the water temperature has little effect on the vacuum, the water saving is more than 90%, and even can not consume water。

4, simple structure, easy maintenance。

5, the pumped gas directly discharged from the pump body, no pollution of water, no environmental pressure, gas recovery is more convenient。

6, no oil consumption, no drip

7, no friction between rotating parts, high-speed operation, small machine volume

8, the surface of the working chamber and the screw rotor has anti-corrosion coating, which can adapt to harsh conditions

9, the gas is not compressed in the pump, suitable for extracting condensable gas

10, can be combined with Roots pump, molecular pump to form an oil-free unit

Dry screw vacuum pump working principle:

Similar to the screw compressor, the working process of the screw dry vacuum pump can be divided into three processes: suction, compression and exhaust。As the rotor rotates, each pair of meshing teeth successively completes the same working cycle, now illustrated by one pair of teeth。

During the suction process, the positive rotor rotates counterclockwise and the negative screw rotates clockwise。The upper rotor end face is the suction section, and the lower end face is the exhaust end face。

The compression process turning on the end face is the exhaust end face。Here, the positive rotor rotates in a clockwise direction and the negative rotor rotates in a counterclockwise direction。The upper rotor end face is the suction section, and the lower end face is the exhaust end face。

Exhaust process The exhaust process of the screw pump, after the volume between the teeth is connected with the exhaust port, the exhaust process begins。With the continuous reduction of the volume between the teeth, the gas with exhaust pressure is gradually discharged through the exhaust port。