CN-116034222-B - Damping system for compressor

Abstract

An squeeze film damper assembly (100) for a compressor (12) includes a damper sleeve (112) configured to be disposed about a rotor shaft (72) of the compressor (12). The damper sleeve (112) includes a pressure dam recess (166) formed in an inner circumference (145) of the damper sleeve (112). The pressure dam recess (166) is configured to receive a lubricant flow (24) and to pressurize the lubricant flow (24) via rotation of the rotor shaft (72). The damper sleeve (112) includes an outlet passage (142) extending from the pressure dam recess (166) to an outer circumference (134) of the damper sleeve (122). The squeeze film damper assembly (100) also includes a bearing housing (110) disposed about the damper sleeve (112) to form a damper gap (116) extending between the outer circumference (134) of the damper sleeve (112) and the bearing housing (110). The damper clearance (116) is fluidly coupled to the outlet passage (142) and configured to receive the lubricant flow (24) from the pressure dam recess (166).

Inventors

• Joseph Woodrow Pilish
• Holger Tickson
• Richard Wieden Amentrauter

Assignees

• 江森自控泰科知识产权控股有限责任合伙公司

Dates

Publication Date

20260508

Application Date

20210512

Priority Date

20200513

Claims (20)

1. 1. An squeeze film damper assembly for a compressor, comprising: A damper sleeve configured to be disposed about a rotor shaft of the compressor and comprising: a pressure dam recess formed in an inner circumference of the damper sleeve and configured to receive and pressurize a lubricant flow via rotation of the rotor shaft, and An outlet passage extending from the pressure dam recess to an outer circumference of the damper sleeve, and A bearing housing disposed about the damper sleeve to form a damper gap extending between the outer circumference of the damper sleeve and the bearing housing, wherein the damper gap is fluidly coupled to the outlet passage and configured to receive the lubricant flow from the pressure dam recess.
2. 2. The squeeze film damper assembly of claim 1, wherein the pressure dam recess comprises an arcuate slot extending along at least a portion of the inner circumference of the damper sleeve.
3. 3. The squeeze film damper assembly of claim 1, comprising an anti-rotation pin extending between the damper sleeve and the bearing housing, wherein the anti-rotation pin prevents rotational movement of the damper sleeve relative to the bearing housing and effects radial movement of the damper sleeve relative to the bearing housing.
4. 4. The squeeze film damper assembly of claim 1, comprising: A first inlet passage formed in the bearing housing and extending to an inner circumference of the bearing housing, and A second inlet passage formed in the damper sleeve and extending from the outer circumference of the damper sleeve to the pressure dam recess, wherein the first inlet passage is fluidly coupled to the second inlet passage to form a lubricant supply passage of an extruded film damper assembly.
5. 5. The squeeze film damper assembly of claim 4, wherein the lubricant supply passage is configured to receive the lubricant flow from a lubricant supply of the compressor and direct the lubricant flow toward the pressure dam recess.
6. 6. The squeeze film damper assembly of claim 1, comprising an inlet passage extending between the pressure dam recess and an opening formed on an axial end face of the damper sleeve, wherein the inlet passage is configured to receive the lubricant flow from a lubricant supply of the compressor and direct the lubricant flow toward the pressure dam recess.
7. 7. The squeeze film damper assembly of claim 1, wherein the pressure dam recess is configured to receive the lubricant flow from a passageway formed in a body of the rotor shaft of the compressor.
8. 8. The squeeze film damper assembly of claim 1, comprising an outlet port formed in the bearing housing, wherein the outlet port is configured to receive at least a portion of the lubricant flow from the damper gap and to discharge the portion of the lubricant flow from the squeeze film damper assembly.
9. 9. The squeeze film damper assembly of claim 8, wherein the outlet port is formed within a portion of the bearing housing above a transverse centerline of the squeeze film damper assembly relative to a direction of gravity.
10. 10. A compressor, comprising: a shaft configured to rotate about an axis; A damper sleeve disposed about the shaft, wherein the damper sleeve includes a pressure dam recess formed in an inner diameter of the damper sleeve and an outlet passage fluidly coupled to and extending from the pressure dam recess to an outer diameter of the damper sleeve, wherein the pressure dam recess is configured to receive lubricant from a lubricant supply of the compressor, and wherein the shaft is configured to pressurize the lubricant within the pressure dam recess to produce pressurized lubricant when rotated about the axis, and A bearing housing disposed about the damper sleeve to form a damper gap extending between the damper sleeve and the bearing housing, wherein the damper gap is fluidly coupled to the outlet passage and configured to receive the pressurized lubricant from the outlet passage.
11. 11. The compressor of claim 10, wherein said pressure dam recess includes an arcuate slot extending along at least a portion of said inner diameter of said damper sleeve.
12. 12. The compressor of claim 11, wherein the arcuate slot terminates at an impingement surface of the damper sleeve, wherein the impingement surface extends radially outward relative to the axis and forms part of the outlet passage.
13. 13. The compressor of claim 10, wherein the outlet passage is fluidly coupled to a first end portion of the pressure dam recess, wherein the damper sleeve includes an inlet passage fluidly coupled to a second end portion of the pressure dam recess, the second end portion being opposite the first end portion, and wherein the inlet passage is configured to direct the lubricant from the lubricant supply into the pressure dam recess.
14. 14. The compressor of claim 13, wherein the inlet passage includes a first opening formed on an outer diameter of the damper sleeve, wherein the bearing housing includes an additional inlet passage including a second opening formed on an inner diameter of the bearing housing, wherein the inlet passage and the additional inlet passage are fluidly coupled to each other, wherein the compressor includes a seal disposed radially between the damper sleeve and the bearing housing and extending around the first opening and the second opening, and wherein the additional inlet passage is configured to direct the lubricant from the lubricant supply to the inlet passage.
15. 15. The compressor of claim 13, wherein the inlet passage includes an axial opening formed in an axial end face of the damper sleeve, wherein the axial opening is fluidly coupled to the lubricant supply to enable flow of the lubricant from the lubricant supply to the inlet passage.
16. 16. The compressor of claim 13, comprising a balance piston assembly configured to apply an axial force on the shaft, wherein the inlet passage is fluidly coupled to the balance piston assembly and configured to receive the lubricant from the balance piston assembly.
17. 17. The compressor of claim 10, wherein the shaft includes: An internal passageway extending along the axis and configured to receive the lubricant from the lubricant supply, and A radial passage extending from the inner passage to an outer diameter of the shaft, wherein the inner passage and the pressure dam recess are fluidly coupled to each other via the radial passage to enable flow of the lubricant from the inner passage into the pressure dam recess.
18. 18. A screw compressor, comprising: A rotor shaft configured to rotate about an axis; A damper sleeve disposed about the rotor shaft, wherein the damper sleeve includes an inlet passage, an outlet passage, and a pressure dam recess extending between the inlet passage and the outlet passage, wherein the inlet passage is configured to receive lubricant at a first pressure and direct the lubricant into the pressure dam recess, and wherein the rotor shaft and the pressure dam recess are configured to cooperatively pressurize the lubricant within the pressure dam recess during rotation of the rotor shaft about the axis to produce a pressurized lubricant having a second pressure greater than the first pressure, and A bearing housing disposed about a damper sleeve to form a damper gap between the damper sleeve and the bearing housing, wherein the damper gap is fluidly coupled to the outlet passage, and the outlet passage is configured to direct the pressurized lubricant from the pressure dam recess into the damper gap.
19. 19. The screw compressor of claim 18, wherein the second pressure is 5 pounds per square inch (psi), 10 psi, 20 psi, 30 psi, 40 psi, 50 psi, or more than 50 psi greater than the first pressure.
20. 20. The screw compressor of claim 18, comprising an anti-rotation pin extending between the damper sleeve and the bearing housing, wherein the anti-rotation pin is configured to prevent rotational movement of the damper sleeve about the axis and relative to the bearing housing, and is configured to effect radial movement of the damper sleeve relative to the axis and relative to the bearing housing.

Description

Damping system for compressor Cross Reference to Related Applications The present application claims priority and benefit from U.S. provisional application No. 63/024,334 entitled "damping System for compressor (DAMPING SYSTEM FOR COMPRESSOR)", filed on 5/13 in 2020, which is incorporated herein by reference in its entirety for all purposes. Background This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present technology, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of any sort. Heating, ventilation, air conditioning, and/or refrigeration (HVAC & R) systems typically maintain temperature control in a structure or other controlled space by circulating a fluid (e.g., refrigerant) through a circuit via a compressor to exchange thermal energy with one or more additional fluids (e.g., water and/or air). One type of compressor that may be used in HVAC & R systems is a screw compressor, which typically includes one or more drum rotors (CYLINDRICAL ROTOR) mounted inside a hollow housing. Twin screw compressor rotors typically have helically extending lobes (or grooves) and grooves (or flanks) on their outer radial surfaces that form threads extending around the circumference of the rotor. During operation, the threads of the rotors mesh together, with the lobes on one rotor meshing with the corresponding grooves on the other rotor to form a series of gaps between the rotors. The gaps cooperate to form a compression chamber that communicates with the compressor inlet or port and continuously reduces the volume of the fluid as the rotor rotates to compress the fluid. In this way, the compressor may direct fluid from the compressor inlet to the compressor outlet. In some cases, rotation of the rotor may produce vibrations that propagate through the casing of the compressor during operation of the compressor. Disclosure of Invention In some embodiments, an squeeze film damper assembly for a compressor includes a damper sleeve configured to be disposed about a rotor shaft of the compressor. The damper sleeve includes a pressure dam recess (pressure dam pocket) formed in an inner circumference of the damper sleeve, wherein the pressure dam recess is configured to receive and pressurize the lubricant flow via rotation of the rotor shaft. The damper sleeve includes an outlet passage extending from the pressure dam recess to an outer circumference of the damper sleeve. The squeeze film damper assembly also includes a bearing housing disposed about the damper sleeve to form a damper gap extending between an outer circumference of the damper sleeve and the bearing housing. The damper clearance is fluidly coupled to the outlet passage and configured to receive the lubricant flow from the pressure dam recess. In some embodiments, a compressor includes a shaft configured to rotate about an axis and a damper sleeve disposed about the shaft. The damper sleeve includes a pressure dam recess formed in an inner diameter of the damper sleeve and an outlet passage fluidly coupled to the pressure dam recess. An outlet passage extends from the pressure dam recess to an outer diameter of the damper sleeve. The pressure dam recess is configured to receive lubricant from a lubricant supply of the compressor. The shaft, when rotated about the axis, is configured to pressurize lubricant within the pressure dam recess to produce pressurized lubricant. The compressor also includes a bearing housing disposed about the damper sleeve to form a damper gap extending between the damper sleeve and the bearing housing. The damper clearance is fluidly coupled to the outlet passage and configured to receive pressurized lubricant from the outlet passage. In some embodiments, a screw compressor includes a rotor shaft configured to rotate about an axis and a damper sleeve disposed about the rotor shaft. The damper sleeve includes an inlet passage, an outlet passage, and a pressure dam recess extending between the inlet passage and the outlet passage. The inlet passage is configured to receive lubricant at a first pressure and direct the lubricant into the pressure dam recess. The rotor shaft and the pressure dam recess are configured to cooperatively pressurize lubricant within the pressure dam recess during rotation of the rotor shaft about the axis to produce pressurized lubricant having a second pressure greater than the first pressure. The screw compressor also includes a bearing housing disposed about the damper sleeve to form a damper gap between the damper sleeve and the bearing housing. The damper gap is fluidly coupled to the outlet passage, and the outlet passage is configured to direct pressuri