AXIAL-PLUNGER PUMP Russian patent published in 1999 - IPC

FIELD: volumetric hydromachines. SUBSTANCE: axial-plunger pump has unit of cylinders with pistons 3 resting against inclined washer 4, distribution disc 7 with windows 8, 9 for intake and pressure and compensator of pulsation moment that includes hollow piston 12 spring-loaded with return spring 13. Replenishment window 10 is located in link between windows 8 and 9 for successive communication of working chamber 5 with tanks 11. Chamber 15 formed by piston 12 in body 1 and replenishment window 10 also communicate with tank 11. At moment of communication of working chamber 5 through replenishment window 10 with tank 11 pressure in the latter falls which results in decreased moment on inclined washer 4 from piston 12 to provide for compensation of increase of moment on inclined washer 4 from piston 3. As result summary moment from actions of pistons 12 and 3 on inclined washer 4 is maintained invariable. Installation of piston 12 in body 1 and communication of chamber 15 formed by it in body 1 with tank 11 makes it possible to compensate for increase of moment on inclined washer 4 from piston 3 located in unit of cylinders and to reduce pulsation of moment on includes washer 4. In addition invention makes it feasible to reduce volume of tank 11 and needed effort of return spring 13 which ensures diminished weight and dimensions of pump. EFFECT: diminished weight and dimensions of pump. 1 dwg