Fixed-displacement vane-type hydraulic machine

• Main Author: SUELTER, BARRY D
• Format: Patent
• Language: English; French; German
• Published: 13.11.2002
• Edition: 7
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES; STEAM ENGINES; WEAPONS

A fixed displacement vane-type hydraulic machine (10) that includes a cartridge assembly (12) having a rotor (18), a plurality of vanes (20) carried by the rotor (18), side plates (22,26) on opposed sides of the rotor (18), and a cam ring (30) carried between the side plates (22,26) surrounding the vanes (20) and rotor (18) to define fluid chambers (34) between the vanes. A housing (14,16) surrounds and encloses the cartridge assembly (12), and provides inlet (48) and outlet (54) passages for feeding fluid to and from the chambers (34). A shaft (44) is coupled to the rotor (18) and extends from the housing (14,16). A cam pin (60) extends radially between the cam ring (30) and the housing (14,16) surrounding the cam ring (30) for preventing rotation of the cam ring (30) with respect to the housing (14,16) so as to absorb reaction torque on the cam ring (30) with respect to the housing (14,16) due to pressure applied to the machine. In a preferred embodiment of the invention, the cam (60) pin is affixed to the cam ring (30), and is slidably received within an axial pocket (62) in the surrounding housing (14,16) during assembly of the cartridge (12) to the housing (14,16). The axial pocket (62) may include either a portion of the fluid flow path that extends through the housing (14,16), or a pocket specially formed in the housing for receiving the cam pin (60).