Power steering pump having intake channels with enhanced flow characteristics and/or a pressure balancing fluid communication channel

摘要

A power steering pump (22b; 22d) having a plate (38) disposed between a first surface (62) and an intake chamber (50) wherein an intake flow channel (76) defined by the first surface (62) is in fluid communication with the intake chamber (50) through an opening (56, 58) extending through the plate (38), the plate opening (56, 58) having opposed terminal ends (60). The intake flow channel (76) defined by the first surface (62) is configured to direct fluid flow through the plate opening (56, 58) into the intake chamber (50) at a location through the plate opening (56, 58) that is intermediate and spaced from the two terminal ends (60) of the plate opening (56, 58). Also, a power steering pump (22c; 22d) having a plate (38) disposed between a first surface (62) and a pair of intake chambers (50) wherein a pair of intake flow channels (68, 70; 80, 82) defined by the first surface (62) are in fluid communication with the intake chambers (50) through a corresponding pair of openings (56, 58) extending through the plate (38). A pressure balancing fluid communication channel (106) extends between the pair of intake flow channels (68, 70; 80, 82) to provide fluid communication between areas (72, 74; 84, 86) of the two intake flow channels (68, 70; 80, 82) where each intake flow channel (68, 70; 80, 82) is in communication with an opening (56, 58) extending through the plate (38), the pressure balancing fluid channel (106) tending to equalize the fluid pressure in the two intake flow channels (68, 70; 80, 82) at the areas (72, 74; 84, 86) where they communicate with the plate openings (56, 58).