公开(公告)号：US20200032791A1

公开(公告)日：2020-01-30

申请号：US16043814

申请日：2018-07-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andy Bennett, SR. ,  Anthony Anzalone ,  Bryan K. Pryor

IPC: F04C14/22 ,  F04C2/344 ,  F16F1/12

Abstract: Variable displacement pumps and biasing assemblies for the same are disclosed. Example pumps may include a housing having an inlet and an outlet, and a rotor fixed for rotation with a shaft, with the shaft rotatably mounted within the housing. The pump may further include a plurality of radially extending vanes slidably disposed in the rotor, and a pivotable ring member defining a control chamber about the rotor, with the ring member being pivotable within the housing to vary an eccentricity of the ring member with respect to the rotor. The pump may further include a biasing assembly applying a biasing force to the ring member in a first direction about the shaft, with the biasing assembly including at least one resilient element extending longitudinally along a stand, and a sliding support slidably disposed on the stand and laterally supporting the resilient element with respect to the stand.