WO2020134434A1 - Compresseur centrifuge et système de circulation de réfrigérant - Google Patents

Compresseur centrifuge et système de circulation de réfrigérant Download PDF

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Publication number
WO2020134434A1
WO2020134434A1 PCT/CN2019/113032 CN2019113032W WO2020134434A1 WO 2020134434 A1 WO2020134434 A1 WO 2020134434A1 CN 2019113032 W CN2019113032 W CN 2019113032W WO 2020134434 A1 WO2020134434 A1 WO 2020134434A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
air supply
supply passage
section
centrifugal compressor
Prior art date
Application number
PCT/CN2019/113032
Other languages
English (en)
Chinese (zh)
Inventor
刘华
张治平
李宏波
钟瑞兴
周宇
陈玉辉
亓静利
叶文腾
刘胜
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2020134434A1 publication Critical patent/WO2020134434A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings

Definitions

  • the present disclosure relates to the technical field of static pressure gas bearings, in particular to a centrifugal compressor and a refrigerant circulation system.
  • Gas hydrostatic bearings are widely used in centrifugal compressors because they have the advantages of high precision, low friction, low vibration, low noise, long life and no pollution.
  • Gas static pressure bearings use external supply pressure to form a gas film for gas lubrication, and its bearing capacity and stiffness increase as the supply pressure increases.
  • air hammer vibration The gas hammer vibration will cause the bearing to not work properly, and the bearing may be damaged in severe cases.
  • the gas hammer vibration phenomenon is directly related to the external supply pressure.
  • the external supply pressure The internal pressure of the bearing can be changed. The higher the internal pressure, the more severe the air hammer vibration.
  • the present disclosure provides a centrifugal compressor and a refrigerant circulation system to simplify the air supply channel of the gas bearing of the centrifugal compressor.
  • a first aspect of the present disclosure provides a centrifugal compressor, including:
  • the main shaft is rotatably arranged in the containing cavity
  • the air supply channel includes a diffuser air supply channel opened on the diffuser and used for supplying gas to the gas thrust bearing.
  • the centrifugal compressor further includes a gas radial bearing
  • the gas supply channel further includes a housing gas supply channel opened on the housing and used for supplying gas to the gas thrust bearing and/or the gas radial bearing.
  • the housing air supply channel includes two independently provided main air supply channel sections, and the two main air supply channel sections include a first main air supply channel section and a second main air supply channel section, the first main The gas supply channel section supplies gas to the gas thrust bearing, and the second main gas supply channel section supplies gas to the gas radial bearing.
  • the centrifugal compressor includes a thrust disk and two gas thrust bearings respectively disposed on both axial sides of the thrust disk.
  • the two gas thrust bearings include a first gas thrust bearing and a second gas thrust bearing.
  • a main gas supply channel section directly supplies gas to the second gas thrust bearing, and the first main gas supply channel section communicates with the diffuser supply gas channel to supply gas to the first gas thrust bearing.
  • the housing air supply channel includes a main air supply channel section, and the main air supply channel section supplies air to both the gas thrust bearing and the gas radial bearing.
  • the housing air supply passage further includes two branch air supply passage sections communicating with the main air supply passage section, and the two branch air supply passage sections include a first branch air supply passage section and a second branch In the gas supply channel section, the first branch gas supply channel section communicates with the diffuser supply gas channel to supply gas to the gas thrust bearing, and the second branch gas supply channel section supplies gas to the gas radial bearing.
  • the centrifugal compressor further includes a thrust disk and a first gas thrust bearing and a second gas thrust bearing respectively disposed on both axial sides of the thrust disk
  • the housing air supply passage further includes a main air supply passage
  • the three branch air supply passages connected by the section, the three branch air supply passages include the first branch air supply passage section, the second branch air supply passage section and the third branch air supply passage section, and the first branch air supply passage section It is in communication with the diffuser gas supply channel to supply gas to the first gas thrust bearing, the second gas supply channel section supplies gas to the gas radial bearing, and the third gas supply channel section supplies gas directly to the second gas thrust bearing.
  • the air supply pressure of the main air supply passage section is adjustably set.
  • the air supply pressure of the main air supply passage section is configured to be adjusted according to the pressure of the receiving chamber and/or the vibration of the main shaft.
  • the air supply pressure of the main air supply passage section is configured to be adjusted according to the pressure of the receiving chamber and/or the dynamic vibration of the main shaft and the radial vibration displacement.
  • the centrifugal compressor further includes a throttle valve connected to the main air supply passage section, and the throttle valve operates to control the air supply pressure of the main air supply passage section.
  • a second aspect of the present disclosure provides a refrigerant circulation system including the centrifugal compressor as provided in any one of the first aspect of the present disclosure.
  • a centrifugal compressor includes a housing with a receiving cavity, a main shaft rotatably disposed in the receiving cavity, a diffuser, a gas thrust bearing, and a gas supply channel, the gas supply channel includes a The diffuser on the compressor and used to supply gas to the gas thrust bearing supplies the gas flow path.
  • the centrifugal compressor of the present disclosure directly supplies air to the gas thrust bearing by providing a diffuser air supply channel on the diffuser, which has a simple structure and convenient processing.
  • FIG. 1 is a schematic diagram of a gas supply channel of a gas thrust bearing according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a gas supply channel of a gas radial bearing according to an embodiment of the present disclosure
  • FIG 3 is a schematic structural view of a gas supply channel of a gas thrust bearing and a gas radial bearing according to another embodiment of the present disclosure.
  • the centrifugal compressor of the embodiment of the present disclosure includes:
  • Housing 1 with accommodating cavity
  • the main shaft 10 is rotatably arranged in the accommodating cavity;
  • the air supply channel includes a diffuser air supply channel 71 opened on the diffuser 7 and used for supplying gas to the gas thrust bearing.
  • the diffuser 7 is provided with a gas flow channel 71 on the diffuser 7 to directly supply gas to the gas thrust bearing.
  • the structure is simple and the processing is convenient.
  • the compressor of the embodiment of the present disclosure further includes an impeller 5 connected to the end of the main shaft 10, a diffuser 7, a thrust disk 3, a first gas thrust bearing 6 and a second gas respectively provided on both axial sides of the thrust disk 3 A thrust bearing 8 and a gas radial bearing 9 for rotatably supporting the main shaft 10 in the housing 1.
  • the impeller 5 is fixedly connected to the main shaft 10 through the impeller locking screw 4.
  • Both the gas thrust bearing and the gas radial bearing of this embodiment include porous media.
  • the gas supply channel circulates gas to the porous medium.
  • the air supply channel of this embodiment further includes a housing air supply channel opened on the housing 1.
  • the housing air supply passage of this embodiment includes two main air supply passage sections, and the two main air supply passage sections are a first main air supply passage section 11A and a second main air supply section respectively In the channel section 11B, the first main gas supply channel section 11A supplies gas to the gas thrust bearing (shown in FIG. 1), and the second main gas supply channel section 11B supplies gas to the gas radial bearing 9 (shown in FIG. 2).
  • the first main supply air flow path section 11A communicates with the diffuser supply air flow path 71 to supply gas to the first gas thrust bearing 6, and the first main supply air flow path section 11A directly to the second gas thrust bearing 8 Gas supply.
  • the gas enters the gap between the thrust bearing and the thrust disk 3 through the internal throttling of the thrust bearing and forms a gas film with pressure.
  • the gas film acts on the thrust disk 3 to cancel the axial force of the system.
  • the gas enters the gap between the gas radial bearing 9 and the main shaft 10, and forms a wedge-shaped gas film together with the rotational dynamic pressure effect to lubricate and support the main shaft 10.
  • the diffuser air supply channel 71 includes a first diffuser air supply channel and a second diffuser air supply channel that are arranged perpendicular to each other, wherein the first diffuser air supply channel is vertically arranged and its end A plug 2 is provided to prevent gas leakage; the second diffuser air supply channel is provided in the axial direction and the opening is provided on the end surface of the diffuser to facilitate communication with the main air supply channel section on the housing 1.
  • the housing air supply channel of this embodiment is provided with two main air supply channel sections, the first main air supply channel section 11A supplies air to the gas thrust bearing, and the second main air supply channel section 11B supplies air to the gas radial bearing. That is to say, the gas thrust bearing and the gas radial bearing are supplied with gas separately, and the gas supply pressure of the two main gas supply channel sections can be adjusted to prevent the occurrence of gas hammer vibration and improve system stability. Moreover, the centrifugal compressor of this embodiment forms a gas supply channel by drilling holes in the diffuser 7 and the housing 1, and the structure is simple and the processing is convenient.
  • the housing air supply channel includes a main air supply channel section 11 which supplies the gas thrust bearing and the gas radial bearing together, so as long as it is adjusted
  • the air supply pressure of the main air supply channel section 11 can adjust the air supply pressure of all bearings, which is convenient for adjustment.
  • the housing air supply duct of this embodiment includes two branch air supply duct sections communicating with the main air supply duct section 11, and the two branch air supply duct sections include a first branch supply The airflow path section 13 and the second branch airflow path section 14, one of the two branch airflow path sections (the first branch airflow path section 13) communicates with the diffuser air supply path 71 to thrust the gas to the bearing
  • the other of the two branch gas supply path sections (second branch gas supply path section 14) supplies gas to the gas radial bearing 9.
  • the housing air supply passage includes three branch air supply passages communicating with the main air supply passage section 11.
  • the three branch air supply passage sections include a first branch air supply passage section 13, a second branch air supply passage section 14, and a third branch air supply passage section 15, the first branch air supply passage section 13 and the diffuser supply air passage 71 is connected to supply gas to the first gas thrust bearing 6, the second branch gas supply path section 14 supplies gas radial bearing 9, and the third branch gas supply path section 15 supplies gas directly to the second gas thrust bearing 8.
  • the air supply pressure of the main air supply passage section can be adjusted and set. Specifically, the air supply pressure of the main air supply channel section of this embodiment is adjusted according to the pressure of the accommodating chamber and the vibration of the main shaft. During the operation of the compressor, the air supply pressure of the main air supply channel section can be adjusted according to the pressure of the accommodating chamber and the vibration of the main shaft to adjust the stiffness and bearing capacity of the bearing to prevent the occurrence of air hammer vibration.
  • the air supply pressure of the main air supply channel section can be adjusted according to the dynamic vibration displacement of the main shaft.
  • the centrifugal compressor further includes a throttle valve connected to the main air supply passage section, and the throttle valve operates to control the air supply pressure of the main air supply passage section.
  • the centrifugal compressor of this embodiment further includes a retaining ring 12 provided at the end of the gas radial bearing 9.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un compresseur centrifuge comprenant une coque (1) comportant une cavité de logement, un arbre principal (10) disposé avec liberté de rotation dans la cavité de logement, un diffuseur (7), un palier de butée à air et un canal d'écoulement d'alimentation en air, le canal d'écoulement d'alimentation en air comprenant un canal d'écoulement d'alimentation en air de diffuseur (71) disposé sur le diffuseur (7) et utilisé pour alimenter en air le palier de butée à air. Grâce au compresseur centrifuge, un palier de butée de l'air est directement alimenté en air par un canal d'écoulement d'alimentation en air de diffuseur sur un diffuseur, afin que sa structure soit simple et que l'usinage soit pratique.
PCT/CN2019/113032 2018-12-25 2019-10-24 Compresseur centrifuge et système de circulation de réfrigérant WO2020134434A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811595302.2A CN111365259A (zh) 2018-12-25 2018-12-25 具有扩压器供气流道的离心式压缩机和冷媒循环系统
CN201811595302.2 2018-12-25

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WO2020134434A1 true WO2020134434A1 (fr) 2020-07-02

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WO (1) WO2020134434A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101432526A (zh) * 2006-04-29 2009-05-13 欧瑞康莱宝真空公司 用于气体轴承的涂层
US20140286599A1 (en) * 2012-01-03 2014-09-25 New Way Machine Components, Inc. Air bearing for use as seal
KR20160116087A (ko) * 2015-03-25 2016-10-07 한국기계연구원 압축공기를 이용하는 추력 조절 및 베어링 냉각 장치
CN106015032A (zh) * 2016-06-28 2016-10-12 杭州万辰机电科技有限公司 离心压缩机
CN106369056A (zh) * 2016-12-05 2017-02-01 中国工程物理研究院机械制造工艺研究所 涡轮增压器
CN108999793A (zh) * 2018-08-12 2018-12-14 西安交通大学 一种离心式压缩机
CN209340163U (zh) * 2018-12-25 2019-09-03 珠海格力电器股份有限公司 用于优化内部空间的压缩机
CN209340165U (zh) * 2018-12-25 2019-09-03 珠海格力电器股份有限公司 具有扩压器供气流道的离心式压缩机和冷媒循环系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101432526A (zh) * 2006-04-29 2009-05-13 欧瑞康莱宝真空公司 用于气体轴承的涂层
US20140286599A1 (en) * 2012-01-03 2014-09-25 New Way Machine Components, Inc. Air bearing for use as seal
KR20160116087A (ko) * 2015-03-25 2016-10-07 한국기계연구원 압축공기를 이용하는 추력 조절 및 베어링 냉각 장치
CN106015032A (zh) * 2016-06-28 2016-10-12 杭州万辰机电科技有限公司 离心压缩机
CN106369056A (zh) * 2016-12-05 2017-02-01 中国工程物理研究院机械制造工艺研究所 涡轮增压器
CN108999793A (zh) * 2018-08-12 2018-12-14 西安交通大学 一种离心式压缩机
CN209340163U (zh) * 2018-12-25 2019-09-03 珠海格力电器股份有限公司 用于优化内部空间的压缩机
CN209340165U (zh) * 2018-12-25 2019-09-03 珠海格力电器股份有限公司 具有扩压器供气流道的离心式压缩机和冷媒循环系统

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