Refrigerant compressor seal arrangements

Patent metadata

Field	Value
Publication number	US-11732701-B2
Application number	US-202117401934-A
Country	US
Kind code	B2
Filing date	Aug 13, 2021
Priority date	Jun 28, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A centrifugal compressor for HVAC application includes a rotary component rotatable about an axis, a static component, and a brush seal fixed to one of the static component and the rotary component. The brush seal includes bristles that contact the other of the static component and the rotary component.

First claim

What is claimed is:

1. A refrigerant cooling system comprising:
at least one multi-stage centrifugal compressor having a first stage and a second stage and including
a rotary component rotatable about an axis;
a static component;
a brush seal positioned within a gap between the first stage and the second stage and fixed to one of the static component and the rotary component and including bristles, wherein the bristles contact the other of the static component and the rotary component, and the bristles each have at least a portion that is angled relative to the radial direction.

2. The system as recited in claim 1 , wherein the brush seal includes a plurality of axially spaced bristle portions that contact the rotary component.

3. A refrigerant heat pump system comprising:
at least one multi-stage centrifugal compressor having a first stage and a second stage and including
a rotary component rotatable about an axis;
a static component;
a brush seal positioned within a gap between the first stage and the second stage and fixed to one of the static component and the rotary component and including bristles, wherein the bristles contact the other of the static component and the rotary component, and the bristles each have at least a portion that is angled relative to the radial direction.

4. The system as recited in claim 3 , wherein the brush seal includes a plurality of axially spaced bristle portions that contact the rotary component.

5. A centrifugal compressor for HVAC application, comprising:
a rotary component rotatable about an axis;
a static component;
a brush seal fixed to the static component, and including a first set of bristles, wherein the first set of bristles contact the rotary component;
a second brush seal fixed to the rotary component and including a second set of bristles, wherein the second set of bristles contact the static component.

6. The compressor as recited in claim 5 , wherein each of the first and second brush seals is positioned to prevent leakage flow in an axial direction between the rotary component and the static component.

7. The compressor as recited in claim 5 , wherein the compressor is a multi-stage centrifugal compressor.

8. The compressor as recited in claim 5 , wherein the first set of bristles each have at least a portion that is angled relative to the radial direction.

9. The compressor as recited in claim 8 , wherein the second set of bristles each have at least a portion that is angled relative to the radial direction.

10. The compressor as recited in claim 5 , wherein the second set of bristles each have at least a portion that is angled relative to the radial direction.

11. The compressor as recited in claim 5 , wherein the first set of bristles contact a surface of an annular groove in the rotary component.

12. The compressor as recited in claim 5 , wherein the rotary component includes a shaft.

13. The compressor as recited in claim 5 , wherein the compressor is a single stage compressor.

14. The compressor as recited in claim 5 , further comprising:
a third brush seal fixed to the static component, and including a third set of bristles, wherein the first set of bristles contact the rotary component;
a fourth brush seal fixed to the rotary component and including a fourth set of bristles, wherein the second set of bristles contact the static component.

15. The compressor as recited in claim 14 , wherein the third brush seal is disposed axially between the second and fourth brush seals.

16. The compressor as recited in claim 15 , wherein the second brush seal is disposed axially between the first and third brush seals.

Assignees

• Danfoss As

Inventors

• Li Tianlei
• Sun Lin
• Dobrica Mihai Bogdan

Classifications

• F25B31/00

  Compressor arrangements · CPC title

• F04B39/00 Primary

  Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 · CPC title

• F04B7/0088 Primary

  Sealing arrangements between the distribution members and the housing · CPC title

• F04B43/009

  leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid · CPC title

• F16J15/3288

  Filamentary structures, e.g. brush seals · CPC title