公开(公告)号：US20200291935A1

公开(公告)日：2020-09-17

申请号：US16817049

申请日：2020-03-12

Applicant: Exponential Technologies, Inc.

Inventor： Kristjan Gottfried ,  Erik Farrell

IPC: F04C2/00 ,  F04C15/00 ,  F04C15/06

Abstract: Several examples of a pressure balancing system for a pump. In one example, the pressure balancing system comprises: a housing; a first rotor within the housing having a first axis of rotation, a first shaft, a first face surface; a second rotor having an axis of rotation, a second face surface adjacent the first face surface of the first rotor; the face of the first rotor, the face of the second rotor, and an inner surface of the housing forming at least one working fluid chamber; an annular ring fitted around a shaft, adjacent a first pressure chamber having a fluid connection through the housing; the annular ring configured to bias the first rotor toward the second rotor when fluid is supplied under pressure to the first pressure chamber; a fluid conduit is configured to convey fluid to a pressure chamber between the housing and the annular ring to bias the annular ring against a radial extension of the first shaft thus biasing the first rotor toward the second rotor.