TWO-STAGE LIQUID-RING MACHINE Russian patent published in 2011 - IPC F04C7/00 F04C19/00 

FIELD: engines and pumps.

SUBSTANCE: two-stage liquid-ring machine includes housings of the first and the second stages with working zone, end covers, assembled impeller which is common for two stages, which is located coaxially in the housing of the first stage and consists of blades installed on fixed shaft in a movable way and passing through the housing of the second stage, which is arranged with eccentricity relative to the housing of the first stage. Passage places of blades of the housing of the second stage are equipped with hinged seals. Rotation of housings is performed from drive shaft of the second stage by means of vee-belt and friction transmissions. On blade ends of the first stage there installed is elastic ring cover separating the fluid ring and working zone of the pump. Invention is aimed at development of the design of double-stage liquid-ring machine in which the blades of the first stage are equipped with elastic cover preventing the penetration of water vapours to the pump working zone.

EFFECT: decreasing overall dimensions, improving capacity, efficiency, and reducing energy consumption for vacuum pumping process.

2 dwg