GEAR-TYPE HYDRAULIC MACHINE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: gear- type hydraulic machine has housing 1 with external gears 2 and 3 fitted in cylindrical bores of housing, end clearance compensators 4,5,6,7 mating with side surfaces of gears 2 and 3 and device for lubricating mating surfaces made in form of blind spaces 10 on side surfaces of gears arranged on ring section limited by radius of bottom of tooth spaces and minimum radius of engagement and blind holes 11 made on working surfaces of compensators 4,5,6,7 and mating simultaneously with ring section and tooth spaces of gears 2 and 3. Blind holes 11 are arranged in high pressure zone for periodical communication with spaces 10 of gears 2 and 3. Spaces 10 have angular extent less than angular distance between hole 11 and nearest border of suction zone. EFFECT: enlarged operating capabilities. 6 dwg