US 2017/0211577 A1 · DUAL INTEGRATED ORGANIC WORKING FLUID PUMP

Abstract

A pump includes a housing, a drive shaft, a centrifugal pump portion having an impeller, and a gear pump portion having first and second gears. The impeller and one of the first and second gears are mounted to the drive shaft to drive the centrifugal pump portion and the gear pump portion at the same rotational speed. The gear pump can be a crescent internal gear (CIG) pump. The drive shaft can be rotated by a magnetic drive. The drive shaft can include a longitudinal bore in fluid communication with a cavity in the magnetic drive and with a discharge of the centrifugal pump portion to circulate working fluid through the magnetic drive to cool the drive. An impeller can be coupled to an inlet of the centrifugal pump portion.

Claims20

Dependent claims

A pump comprising:

a housing to enclose at least a first pump portion and a second pump portion, wherein the first pump portion and the second pump portion are coupled to a common drive shaft;
the first pump portion, upon rotation of the common drive shaft, to cause a first fluid pressure to change to a second fluid pressure, the first pump portion including a fluid discharge, wherein the fluid discharge is at the second fluid pressure;
and
the second pump portion, upon rotation of the common drive shaft, to cause the second fluid pressure to change to a third fluid pressure, the second pump portion including a fluid inlet, wherein the fluid inlet is at the second fluid pressure and in fluid communication with the fluid discharge of the first pump portion.

1 more element

Dependencies are inferred from the claim text.

Dual integrated organic working fluid pump

Life of this patent

Dual integrated organic working fluid pump

Life of this patent

Abstract

Claims20