Dry screw vacuum pump analysis _ from principle and structure of the system

dry screw vacuum pump is a kind of vacuum pump equipment, which USES a pair of screw in the pump shell synchronized high speed reverse rotation to produce suction and exhaust. Dry screw vacuum pump working principle is: mutually meshing engagement synchronous reverse rotation does not contact left screw and right for high speed rotating screw, and the pump shell and pitch propeller spiral groove is divided into multiple space to form a multiple stages. Gas move in equal gap, but there is no compression. Only the screw at the end of the helical structure will be compressed gas and eventually form a vacuum.

the advantages of the dry screw vacuum pump dry screw when vacuum water pump is working, there is no friction between each other, the operation is relatively stable, relatively low noise, do not need lubricating oil and the studio. Therefore, dry screw vacuum pump can remove dust contains a lot of water vapor and a small amount of gas. Ultimate vacuum higher, lower power consumption, the advantages of energy saving is a maintenance free. It is the upgrade version of oil seal vacuum pump.

the working principle of dry screw vacuum pump is mainly using gear synchronous and reverse rotation around the screw to the right and left hand screw screw at high speed. casing and pitch propeller spiral groove is divided into multiple space and form for multiple space. In the aperture of gas in equal motion and not be compressed. Only the screw at the end of the spiral structure of compressed gas. Can be formed between the pressure gradient at all levels in the screw to distract pressure difference and increase the compression ratio. Gaps between the parts and the speed of the water pump has a great influence on the performance of the pump. In the design of screw gaps between the parts, it is necessary to consider expansion, processing and assembly accuracy and the working conditions. No dry screw vacuum pump and roots vacuum pump as the exhaust valve.

dry screw vacuum pump is a vertical structure, air inlet is at the top, vent is located in the central, lower part used for motor and lubricant pool. The screw rotor with hollow shape and the cantilever support structure. Below the synchronous drive gear is located in the bearing support. To the active rotor by frequency conversion motor shaft coupling. gas circuit short, vertical structure is conducive to eliminate the dust gas. With functions of water cooling pump shell, pump maintenance is also very convenient.

dry screw vacuum pump with the appropriate a simple outline of the screw, so its advantage is to manufacture simple, ensure high machining accuracy and is easy to balance. According to its working principle, we can clearly recognize the dry screw vacuum pump is a kind of extreme high vacuum degree, low power consumption, energy saving and maintenance of the pump.