ADJUSTABLE GEAR-TYPE PUMP Russian patent published in 2014 - IPC F04C2/08 F04C14/18 

FIELD: engines and pumps.

SUBSTANCE: invention relates to power engineering, and namely to volumetric hydraulic machines of adjustable capacity. An adjustable gear-type pump of external engagement with axial movement of one of pump gears 5 includes a pair of end bandages 6 and 7 with internal teeth arranged in cavities of pump gears 4 and 5, and contactless seals 13 and 14. Seals 13 and 14 are gear-type and fixed on end faces of gears 4 and 5 located inside bandages 6 and 7. Teeth of seals 13 and 14 are arranged in cavities of internal teeth of bandages 6 and 7. Their modules, gaps and number of teeth are made as per certain expressions.

EFFECT: increasing volumetric efficiency owing to reducing leakage volume of pumped fluid via reduced gaps between teeth of end bandages and pump gears.

2 dwg