GEAR PUMP OR HYDRAULIC GEAR MOTOR WITH HELICAL TOOTHING PROVIDED WITH HYDRAULIC SYSTEM FOR AXIAL THRUST BALANCE.

摘要

Gear pump or hydraulic gear motor with helical toothing provided with hydraulic system for axial thrust balance. A gear pump (100) comprises a toothed driving wheel (1) a toothed driven wheel (2) a front flange (6) from which a projecting portion (13) of the shaft protrudes frontally being connected to the shaft (10) of the driving wheel a back lid (7) fixed to the case (3) and an intermediate flange (8) disposed between the case (3) and the front flange (6). The intermediate flange (8) comprises a first chamber (80) and a second chamber (81) connected by means of a connection duct (82) to the inlet or outlet fluid duct of the pump; a compensating ring (9) mounted in the first chamber (80) of the intermediate flange and inserted on a portion (T) of the shaft (10) of the driving wheel in such manner to compensate the axial forces (A) of the driving wheel and transmit the motion on the shaft (10) of the driving wheel; and a piston (88) mounted in the second chamber (81) of the intermediate flange in order to stop against one end of said shaft (20) of the toothed driven wheel in such manner to compensate the axial forces (B) imposed on the toothed driven wheel.