EP2458213A1 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

Info

Publication number
EP2458213A1
EP2458213A1 EP10752711A EP10752711A EP2458213A1 EP 2458213 A1 EP2458213 A1 EP 2458213A1 EP 10752711 A EP10752711 A EP 10752711A EP 10752711 A EP10752711 A EP 10752711A EP 2458213 A1 EP2458213 A1 EP 2458213A1
Authority
EP
European Patent Office
Prior art keywords
pump
free end
compressor
shaft
oil
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10752711A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dietmar Erich Bernhard Lilie
Manfred Krueger
Rodrigo Antonio Santiago
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whirlpool SA
Original Assignee
Whirlpool SA
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 Whirlpool SA filed Critical Whirlpool SA
Publication of EP2458213A1 publication Critical patent/EP2458213A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—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
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • F04B39/0253—Hermetic compressors with oil distribution channels in the rotating shaft using centrifugal force for transporting the oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating

Definitions

  • the present invention refers to a hermetic compressor and, more specifically, to a hermetic compressor comprising a centrifugal pump to provide oil for the moving parts of said compressor.
  • a compressor has the function of elevating the pressure of a certain volume of fluid to a pressure that is required to carry out a determined work.
  • the Refrigeration Industry commonly utilizes hermetic compressors comprising, in general, a sealed shell which defines, in its interior, an oil reservoir and an oil pump device that is responsible for leading the oil of the reservoir to the moving parts of the compressor.
  • a difficulty that results from the reduction of operational rotation is the pumping of the oil. Pumps normally used in those compressors are based on the centrifugal effect to lead the oil towards the parts to be lubricated. Those pumps are widely used due to its low cost and high reliability. Other alternatives with different principles can make the pumping in low rotation speeds possible, but the cost and the reliability are not competitive.
  • the prior art oil pumps comprise an oil intake tube having an oil input.
  • the intake stage depends on the centrifugal effect, wherein the pump rotation speed forces the oil that goes into the orifice against the walls of the tube, promoting the increase in pressure, and, consequently, its elevation.
  • the pumping energy that is necessary for lubricating, is obtained from the rotation and from the diameter of the pump.
  • a lower rotation is defined for the compressor to achieve a better performance of the same, which is applied to the refrigeration system, such rotation tends to be as low as possible, wherein the oil pump is the main limiting factor to decrease the rotation.
  • the diameter of the oil input orifice the upsetting height (i.e. height between the suction point of the pump and the highest elevation point of the oil) and the radius or diameter of the pump.
  • the diameter of the input orifice of the pump creates a pressure equalization region, rendering such region inactive.
  • the increase in pressure, which is resulted from the centrifugation, only occurs in regions having a higher diameter than the one of the input orifice.
  • an input orifice having a very big diameter will prejudice the performance of the pump in low rotation speeds.
  • the radius or diameter of the pump in the oil output region i.e., in the region of the input orifice of the first bearing of the compressor
  • the radius or diameter of the pump in the oil output region is fundamental to the efficiency of the pump. This is due to the fact that the path followed by the oil through the shaft interior up to such output orifice shall consider the parabolic form acquired by the oil from its centrifugation, wherein no protuberance can intercept such parabola (if an interception occurs, the flux of oil will be simply interrupted).
  • the design of the pump has an important role in the performance of the compressor, further considering the need of a pump that is suitable for a compressor operating at a reduced rotation.
  • one of the objectives of the invention is the provision of an efficient oil pump for being utilized with a hermetic compressor having a variable speed driver.
  • Another objective of the present invention is the provision of an oil pump designed to efficiently actuate in a compressor operating at a reduced rotation.
  • a hermetic compressor comprising a shell which involves the component parts of a compressor, an oil reservoir in the inferior part of the shell, a cylinder block that incorporates a bearing to support a vertical shaft on which a rotor is assembled, and a centrifugal pump that leads the oil to the moving parts of the compressor, wherein said vertical shaft extends axially from the rotor to form a free end in its inferior portion, the free end being sized to be received in a corresponding end of the centrifugal pump, and at least one portion of the inner sidewall of the end of the pump and at least one portion of the outer sidewall portion of the shaft assuming a juxtaposed condition after the reception.
  • the free end of the vertical shaft extends axially, and only enough, to enable the attachment of the end of the pump, wherein, in a preferred embodiment, the free end of such vertical shaft extends up to a maximum of 6 mm.
  • the free end presents a machined portion having a reduced external diameter in order to facilitate the assembly of the end of the pump.
  • the assembly between the free end of the shaft and the corresponding end of the pump is preferably effectuated by interference fit, but alternative means, such as binding, would be equally used.
  • FIGS 1 and 2 illustrate compressors comprising pumping solutions that are already in the prior art.
  • the oil pump (1) is inserted in the rotor of the engine (2).
  • the pump (1) has an end (3) plunged in the oil (4) disposed in a reservoir of the shell (5) and another end (6) inserted in the rotor (2).
  • This configuration creates a free pathway for the oil, but restricts the region that is available for attaching the shaft (7) and the pump.
  • the shaft (7) is continuous up to the superior end (6) of the pump.
  • the pump (1) is inserted in the shaft (7), wherein said shaft (7) extends up to the end of the rotor (2).
  • This configuration improves the region that is available for attaching the shaft (7), but the diameter of the oil passage is affected to enable the insertion of the pump in the shaft.
  • the present invention discloses a pumping solution capable of guaranteeing a suitable diameter for passing the oil, an optimization of the upsetting height, and a simplified assembly means for the oil pump.
  • the shaft (7) extends slightly from the rotor (2), leaving a free end (8) to enable the assembly of the centrifugal pump (1).
  • the free end (8) has only a necessary extension for enabling the assembly of the pump (1). This is due to the need of non-extending too far the shaft (8), what would result in an unnecessary use of the material, elevating, therefore, the final cost of the compressor. Thus, in a preferred embodiment of the present invention, the extension of the free end is limited to 6 mm.
  • one end of the pump (1) is plunged in the oil (4), wherein such end further comprises an input orifice (9) in its more extreme portion.
  • the other end (12) of the pump (1) is sized to be connected with the free end (8) of the shaft (7), wherein the outer side wall of the shaft and the inner side wall of the pump are arranged in a juxtaposed condition after fitting.
  • one part of the free end of the shaft (7) is machined to reduce its external diameter, wherein such machined part is reserved for receiving the end of the pump to be assembled.
  • the assembly of the pump (1) on the free end (8) of the shaft (7) is carried out by interference fit, not being necessary the use of binders or adhesives.
  • the assembly of the pump (1) on the free end (8) of the shaft (7) is carried out by means of binding.
  • the centrifugal power causes the elevation of oil in the inner side wall of both pump and shaft in a parabolic configuration, as shown by number (10) in figure 4 .
  • the pumping energy shall be sufficient so as the upsetting height reaches the output orifice where the first bearing is disposed, as shown by number (11) in such figure.
  • the correct sizing of the parabolic column up to a height H depends on guaranteeing a sufficient radius R.
  • the assembly of the pump (1) in an external position in relation to both shaft and rotor guarantees a suitable upsetting height, wherein the input orifice is naturally disposed closer to the shaft.
  • the configuration for assembling the pump of the present invention achieves, by means of a simple and economic construction, a pumping solution that is efficient at providing a compressor operating at low rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP10752711A 2009-07-24 2010-07-26 Hermetic compressor Withdrawn EP2458213A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0902430-1A BRPI0902430A2 (pt) 2009-07-24 2009-07-24 compressor hermético
PCT/BR2010/000257 WO2011009186A1 (pt) 2009-07-24 2010-07-26 Compressor hermético

Publications (1)

Publication Number Publication Date
EP2458213A1 true EP2458213A1 (en) 2012-05-30

Family

ID=43063437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10752711A Withdrawn EP2458213A1 (en) 2009-07-24 2010-07-26 Hermetic compressor

Country Status (10)

Country Link
US (1) US20120189437A1 (enExample)
EP (1) EP2458213A1 (enExample)
JP (1) JP2013500415A (enExample)
KR (1) KR20120034759A (enExample)
CN (1) CN102483052A (enExample)
BR (1) BRPI0902430A2 (enExample)
IN (1) IN2012DN00706A (enExample)
MX (1) MX2012001053A (enExample)
SG (1) SG177748A1 (enExample)
WO (1) WO2011009186A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15828U1 (de) * 2016-12-27 2018-07-15 Secop Gmbh Schmiermittelaufnahme für einen kältemittelkompressor und kältemittelkompressor
AT15924U1 (de) * 2017-04-28 2018-09-15 Secop Gmbh Kältemittelverdichter

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3285504A (en) * 1964-12-10 1966-11-15 Gen Motors Corp Refrigerant apparatus
US4488855A (en) * 1982-12-27 1984-12-18 The Trane Company Main bearing lubrication system for scroll machine
IT1159578B (it) * 1983-05-03 1987-03-04 Aspera Spa Albero a gomito per compressori ermetici di frigoriferi e simili
US4518323A (en) * 1983-07-25 1985-05-21 Copeland Corporation Hermetic refrigeration compressor
JPS60166784A (ja) * 1984-02-10 1985-08-30 Mitsubishi Electric Corp スクロ−ル圧縮機
JPS61155666A (ja) * 1984-12-27 1986-07-15 Matsushita Refrig Co 冷媒圧縮機
KR870002381A (ko) * 1985-08-23 1987-03-31 미다 가쓰시게 스크로울 압축기
JPH0647991B2 (ja) * 1986-05-15 1994-06-22 三菱電機株式会社 スクロ−ル圧縮機
JPH0735790B2 (ja) * 1986-06-23 1995-04-19 株式会社日立製作所 スクロ−ル圧縮機
US5219281A (en) * 1986-08-22 1993-06-15 Copeland Corporation Fluid compressor with liquid separating baffle overlying the inlet port
GB2202905B (en) * 1987-03-12 1991-07-24 Matsushita Electric Industrial Co Ltd Scroll compressor
JPS63223374A (ja) * 1987-03-12 1988-09-16 Matsushita Electric Ind Co Ltd 電動圧縮機
JPH04140491A (ja) * 1990-09-28 1992-05-14 Sanyo Electric Co Ltd 密閉型電動圧縮機
CN1063831C (zh) * 1994-04-04 2001-03-28 巴西船用压缩机有限公司 用于变速密封压缩机的油泵
DE10106234C2 (de) * 2001-02-10 2002-12-12 Danfoss Compressors Gmbh Kolbenverdichter
JP2005140066A (ja) * 2003-11-10 2005-06-02 Hitachi Ltd 流体圧縮機
SI1957796T1 (sl) * 2005-11-28 2010-09-30 Arcelik As Kompresor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011009186A1 *

Also Published As

Publication number Publication date
SG177748A1 (en) 2012-03-29
BRPI0902430A2 (pt) 2011-04-05
JP2013500415A (ja) 2013-01-07
US20120189437A1 (en) 2012-07-26
CN102483052A (zh) 2012-05-30
IN2012DN00706A (enExample) 2015-06-19
WO2011009186A1 (pt) 2011-01-27
MX2012001053A (es) 2012-03-14
KR20120034759A (ko) 2012-04-12

Similar Documents

Publication Publication Date Title
CN1325796C (zh) 密闭型电动压缩机
EP1985860A2 (en) Rotary compressor
CN202370792U (zh) 一种应用于制冷压缩机的曲轴
EP3214312A1 (en) Two-cylinder hermetic compressor
US8978826B2 (en) Compressor
EP3214263A1 (en) Two-cylinder hermetic compressor
EP3409949A1 (en) Rotary compressor having two cylinders
CN104074764A (zh) 旋转压缩机
EP2458213A1 (en) Hermetic compressor
CN104819155B (zh) 用于旋转式压缩机的曲轴、旋转式压缩机及制冷循环装置
US9841024B2 (en) Compressor and method for producing compressor
EP3922854A1 (en) Rotary compressor, method for manufacturing rotary compressor, and refrigeration cycle device
CN204627989U (zh) 用于旋转式压缩机的曲轴、旋转式压缩机及制冷循环装置
CN208816288U (zh) 曲轴及变频压缩机
EP2918773B1 (en) Rotary compressor
US10859076B2 (en) Compressor
US20040234386A1 (en) Discharge muffler having an internal pressure relief valve
CN102439313A (zh) 压缩机，特别是将二氧化碳作为冷却剂的径向活塞压缩机
CN205977618U (zh) 一种压缩机机架及使用该机架的压缩机
US20200158100A1 (en) Refrigerant compressor
CN109185154B (zh) 泵体组件及压缩机
KR101646044B1 (ko) 밀폐형 압축기 및 이것을 이용한 냉장고
CN107387419B (zh) 控油组件、泵和旋转式压缩机
CN219101593U (zh) 曲轴导油组件以及压缩机
US20240418158A1 (en) Reciprocating compressor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120124

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20141211

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150422