Annular air bag compensation sealing four-space rotor pump

Abstract

The invention discloses an annular air bag compensation sealing four-space rotor pump, which comprises a pump body 4, a shaft rotor 1 arranged on a center through hole 41 of the pump body 4, and a driven rotor 2 arranged on an eccentric half-hole 42 of the pump body 4, wherein working inner end faces of the two rotors are close to a bottom plane 40 of the eccentric half-hole 42; working outer endfaces of the two rotors are close to a horizontal frontal plane of a compensating disc 6; the work area outer end face of the eccentric half-hole 42 is provided with an eccentric end cover 5 which ishermetically fixed by using at least three bolts 8; a positioning pin 7 and an annular air bag 9 are arranged between the backside of the compensating disc 6 and the eccentric end cover 5; and the shaft rotor 1 and the driven rotor 2 synchronously generate four axially-stretching sealing strips to form four working spaces A, B, C and D. The structure achieves end face abrasion seal compensation and radial abrasion seal compensation at the same time, and ensures that a high-pressure cavity and a low-pressure cavity are in a good dynamic isolation sealing state for a long time.

Description

technical field [0001] The invention belongs to the field of mechanical engineering. The international patent classification is FO4D non-variable pump, which relates to an energy conversion volumetric pump which converts mechanical energy into liquid pressure energy, in particular to an annular airbag compensation sealed four-space rotor pump. Background technique [0002] The main structural forms of known positive displacement pumps are: plunger pump, screw pump, Roots pump and sliding vane pump. As a positive displacement pump, it has the advantage of high efficiency, but its efficiency is obviously reduced after long-term wear and tear. The main reason for the above defects is that the end face movable isolation between the high-pressure chamber and the low-pressure chamber cannot effectively seal. If the tolerance size of the end face is too small, it is easy to be stuck due to thermal expansion. If the tolerance size of the end face is too large, it will not be effecti...

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Problems solved by technology

) to collect global engineering science and technology papers, and there has never been a positive displacement pump that can simultaneously have end face wear seal compensation and radial wear seal compensation

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