Working principle of the dry screw vacuum pump -

dry screw vacuum pump is a kind of use a pair of screw in the pump shell synchronous high-speed reverse suction exhaust effect of vacuum pump equipment. Dry screw vacuum pump working principle is: use gear synchronous reverse rotation, pitch, out of touch with left and right screw at high speed; Using the pump casing and meshing propeller spiral groove into multiple space, form a multiple level; Into the groove of the gas in the same delivery, but not be compressed; Only the screw at the end of the screw structure of gas compression, eventually form a vacuum.

a, the advantages of the dry screw vacuum pump

work, there is no friction between the dry screw vacuum pump, the operation is relatively stable, relatively low noise, working cavity does not need lubricating oil. Therefore, dry screw vacuum water pump can extract contains a large number of water vapor and a small amount of gas, dust has extreme high vacuum degree, low power consumption, energy saving, maintenance free, etc. It is a upgrade version of the oil seal vacuum pump.

2. Working principle of dry screw vacuum pump

the working principle of dry screw vacuum water pump is mainly using gear synchronous inversion mesh but not contact left screw and right screw rotation at a high speed. casing and propeller pitch spiral groove used to divided into multiple space and form. In the absence of compressed gas in the groove of the equal transmission. Only the screw at the end of the screw structure has the effect of the compressed gas. Can be in all stages of the screw between formation pressure gradient, to distract pressure difference and improve the compression ratio. Clearance between various components and pump speed has a great influence on the performance of the pump. When designing the clearance between the thread parts, should consider expansion, processing and assembly accuracy and the working conditions. Like the roots vacuum pump, no dry screw vacuum pump exhaust valve.

3, the structure principle of dry screw vacuum water pump

dry screw vacuum pump for vertical structure, air inlet at the top, the outlet in the middle, motor and lubricating oil pool below. Screw rotor is hollow, and a cantilever support structure. Below the synchronous transmission gear is located in the bearing support. Frequency conversion motor through coupling connected to the active rotor, pump gas circuit short, vertical structure is more advantageous to remove gas containing dust. casing by water cooling, maintenance is convenient. If choose a relatively simple dry screw vacuum pump of the helical tooth profile section, its advantage is simple manufacturing, processing and high precision, easy to dynamic balance. According to its working principle, we can clearly recognize the dry screw vacuum pump with high vacuum limit, the advantages of low power consumption, energy saving, maintenance free.

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