Hydraulic delivery device

Hydraulic delivery device

The invention relates to a hydraulic delivery device or pump with a displacement unit mounted in a housing and set in rotation through a drivable shaft. A rotor 26 is mounted rotationally secured on the shaft in a pump chamber 14. Rotation of the rotor produces at least a first region (suction region) with increasing volume and at least a second region (pressure region) with reducing volume. The first region is connected to a suction connection 28 of the delivery device and the second region is connected to a pressure connection 32 of the delivery device. The device has a regulator for setting or restricting a volume flow delivered by the delivery device. The pump chamber 14 is defined on one side by a plate 54 which produces a hydraulic control function of the delivery device 10, which acts as a sealing device for sealing regions of the delivery device 10 which are under different pressures, and which effects an axial positioning of the shaft 24 after fitting and centring the plate 54.

Hydraulic delivery device

A hydraulic delivery device 410, such as for power steering or auxiliary brake systems, has a displacement unit 414 such as a rotary pump, and a flow regulating valve 426 and a variable throttle device 438 which adjust and limit a volume flow Q delivered by the device. A pressure collection chamber 451 at working pressure P2 is connected with a consumer user pressure connection 418 at pressure P3 via the variable throttle valve arrangement 438 which acts independently of the working pressure P2.but dependent upon a difference in pressure between the user pressure P3 and a pressure P1 within a pressure cell 422 of the displacement unit 414 to influences a through passage cross section of a pressure connection between the pressure collecting chamber 451 and the pressure connection 418. Also disclosed (figs 5-7) are pipe union connections to the device.

Hydraulic delivery service