Gear pump bearings

Patent metadata

Field	Value
Publication number	US-10858939-B2
Application number	US-201816041621-A
Country	US
Kind code	B2
Filing date	Jul 20, 2018
Priority date	Jul 20, 2018
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

A gear pump bearing can include a body sized and shaped to occupy a portion of a pump housing cavity such that a clearance is formed between the body and a pump housing. The gear pump bearing can also include at least one clearance consuming feature extending from an outer surface of the body configured to reduce motion of the body within the pump housing cavity.

First claim

What is claimed is:

1. A gear pump bearing, comprising:
a body sized and shaped to occupy a portion of a pump housing cavity such that a clearance is formed between the body and a pump housing; and
at least one clearance consuming feature extending from an outer surface of the body configured to reduce motion of the body within the pump housing cavity, wherein the at least one clearance consuming feature includes a plurality of pins disposed on or within the body at different circumferential positions on the body.

2. The bearing of claim 1 , wherein the plurality of pins includes two pins.

3. The bearing of claim 2 , wherein the plurality of pins are inserted into a respective pin hole defined in the body.

4. The bearing of claim 3 , wherein the plurality of pins are epoxied to the body.

5. The bearing of claim 2 , wherein the pins are disposed about 45 degrees apart.

6. The bearing of claim 1 , wherein the at least one clearance consuming feature further includes at least one raised outer diameter extension.

7. The bearing of claim 1 , further comprising an inner aperture defined in the body for receiving a shaft of a gear.

8. The bearing of claim 1 , wherein the bearing includes a flat configured to mate with a flat of mating gear bearing within the pump housing cavity.

9. The bearing of claim 1 , wherein the outer surface is partially circular having a first radius, wherein pump housing cavity is partially circular having a second radius, wherein first radius is smaller than second radius.

10. A gear pump, comprising:
a pump housing defining a pump housing cavity, an inlet, and an outlet;
a plurality of gear bearings disposed within the pump housing cavity, at least one of the gear bearings comprising:
a body sized and shaped to occupy a portion of the pump housing cavity such that a clearance is formed between the body and a pump housing; and
at least one clearance consuming feature extending from an outer surface of the body configured to reduce motion of the body within the pump housing cavity; and

a plurality of gears disposed within pump housing cavity, each gear rotatably mounted between and in contact with a pair of the plurality of gear bearings, wherein the gears and the gear bearings are disposed within the pump housing in a pumping relationship to cause pumping action between the inlet and the outlet when the gears are rotated, wherein the at least one clearance consuming feature includes a plurality of raised outer diameter extensions disposed at different circumferential positions on the body, wherein the at least one clearance consuming feature includes at least one pin disposed on or within the body, wherein the at least one pin includes a plurality of pins disposed at different circumferential positions on the body.

11. The pump of claim 10 , wherein the plurality of pins includes two pins.

12. The pump of claim 11 , wherein the plurality of pins are inserted into a respective pin hole defined in the body.

13. The pump of claim 12 , wherein the plurality of pins are epoxied to the body.

14. The pump of claim 11 , wherein the pins are disposed about 45 degrees apart.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Goy Edward W
• Wetch Joseph
• Wlaznik Ryszard Czeslaw
• Samotshozo Ernest W

Classifications

• F01C21/02 Primary

  Arrangements of bearings (bearing constructions F16C) · CPC title

• F04C2/123

  with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth · CPC title

• F04C15/0026 Primary

  Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps · CPC title

• F04C2/18

  with similar tooth forms (F04C2/16 takes precedence) · CPC title

• F04C2240/50

  Bearings · CPC title