HYDRO-PUMP FOR OBTAINING HIGH EFFICIENCY AS A HYDRAULIC MEDIUM DOES NOT FLOW FROM A PRESSURE CHAMBER TO A SUCTION CHAMBER OUTSIDE A COUNTER-CURRENT CONNECTION UNIT FOR FLOWING THE HYDRAULIC MEDIUM

摘要

PURPOSE: A hydro-pump is provided to prevent pressure pulsation generated by filling suddenly a volume filled with the air by charging perfectly a saw-tooth chamber with oil until the saw-tooth chamber is induced to a pressure chamber. CONSTITUTION: A hydro-pump, especially a gear pump is composed of a pressure chamber(1); a suction chamber(2); at least one displacer(3) coupled between the pressure chamber and the suction chamber to pump a hydraulic medium from the suction chamber to the pressure chamber; and a counter-current connection unit(4) disposed at a pressure rise region from the pressure chamber shielded about the suction chamber in pressure-sealing method and formed with a set flow cross section for the suction chamber. The gear pump comprises a pinion(10) having outer saw teeth and a ring(11) having inner saw teeth. The pinion is disposed eccentrically in the ring and engaged with the ring.