US 10,385,850 B2Granted

Hydraulic pump having a cylindrical roller within a housing having an inlet gallery and an outlet gallery formed in a circumferential outer surface of the housing

AssigneeGoodrich Actuations Systems Limited

InventorRobert A. Pawlik

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Abstract

A hydraulic pump is described comprising a rotor provided for rotation about a longitudinal axis (X-X) within a housing. The pump comprises a plurality of chambers for pumping a fluid that are provided by longitudinally extending recesses in a circumferential outer surface of the rotor. During use the recesses are moved across a circumferential inner surface of the housing, and in so doing, are moved over an inlet port in the housing to draw fluid into the chamber and then over an outlet port in the housing to discharge the fluid. The hydraulic pump further comprises a roller that is mounted in a longitudinally extending pocket of the housing. The roller is positioned after the outlet port in a direction of the rotor's rotation and is arranged to follow the outer surface of the rotor and seal against each recess as it is drawn past the roller, thereby directing fluid from the chamber into the outlet port.

Claims9

Dependent claims

A hydraulic pump comprising:

a rotor provided for rotation about a longitudinal axis within a housing, the pump comprising
a plurality of chambers for pumping a fluid, the chambers being provided by longitudinally extending recesses in a circumferential outer surface of the rotor, the recesses being moved across a circumferential inner surface of the housing during rotation of the rotor, and in so doing, being moved over an inlet port in the housing to draw fluid into the chambers and then over an outlet port in the housing to discharge the fluid, wherein
the hydraulic pump further comprises a cylindrical roller that is mounted in a longitudinally extending pocket of the housing, the cylindrical roller being positioned after the outlet port in a direction of the rotor's rotation, the cylindrical roller further being arranged to follow the outer surface of the rotor and seal against each recess as it is drawn past the cylindrical roller, thereby directing fluid from the chambers into the outlet port;
a plurality of groups of the inlet port followed by the outlet port and an associated cylindrical roller;
the groups being arranged sequentially around the circumferential inner surface of the housing in the direction of rotation of the rotor, so that each recess of the rotor is drawn past each group in turn during a full rotation of the rotor;
wherein
the inlet ports are in fluid communication with each other via an inlet gallery comprising a plurality of radially extending inlet channels which are linked by an inlet ring extending circumferentially around the housing;
and/or
the outlet ports are in fluid communication with each other via an outlet gallery comprising a plurality of radially extending outlet channels which are linked by an outlet ring extending circumferentially around the housing;
wherein both the inlet gallery and the outlet gallery are formed in the circumferential outer surface of the housing.

7 more elements

A method of making a hydraulic pump, the method comprising:

fabricating a housing having a circumferential outer surface and a circumferential inner surface, the inner surface being adapted to receive a rotor for pumping a fluid, the fabricating including forming, in the inner surface of the housing, an inlet port and an outlet port for a fluid and a longitudinally extending pocket for receiving a cylindrical roller, the pocket being positioned after the outlet port in the intended direction of the rotor's rotation;
fabricating a rotor comprising forming a plurality of longitudinally extending recesses in a circumferential outer surface of the rotor;
introducing the rotor within the housing and arranging it for rotation with respect to the housing, wherein the recesses in the rotor are enclosed by the circumferential inner surface of the housing to provide a plurality of chambers for conveying fluid between an inlet port and an outlet port of the housing;
introducing a cylindrical roller into the pocket of the housing and arranging it so as to follow the outer surface of the rotor and seal against each recess as the rotor is drawn past the cylindrical roller;
drilling radial holes through the housing to provide the inlet port and the outlet port for the fluid, the radially extending holes providing inlet channels and outlet channels respectively;
machining a circumferentially extending groove in the circumferential outer surface of the housing to provide an inlet ring which connects inlet channels;
machining a circumferentially extending groove in the circumferential outer surface of the housing to provide an outlet ring which connects outlet channels;
and
fitting a case over the housing to enclose the grooves.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/198,330Filed 30 Jun 2016
Priority: EP 154615476 Jul 2015
Published: US 2017/0009769 A112 Jan 2017
Granted: 20 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F04C 15/0065
Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions: for eccentric movement
F04C 2/3564
The inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation: the surfaces of…
F04C 2/3566
With vanes reciprocating with respect to the outer member: the inner and outer member being in contact along more than one line or surface
F04C 11/008
Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type ; Pumping installations: enclosed motor pump…