US20210040950A1 - Scroll compressor and method for assembling same - Google Patents

Scroll compressor and method for assembling same Download PDF

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Publication number
US20210040950A1
US20210040950A1 US16/982,474 US201916982474A US2021040950A1 US 20210040950 A1 US20210040950 A1 US 20210040950A1 US 201916982474 A US201916982474 A US 201916982474A US 2021040950 A1 US2021040950 A1 US 2021040950A1
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US
United States
Prior art keywords
housing section
main shaft
bearing
housing
scroll compressor
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.)
Abandoned
Application number
US16/982,474
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English (en)
Inventor
Daniel Blasko
Thomas Küppers
Michael Lüer
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of US20210040950A1 publication Critical patent/US20210040950A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/605—Balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings

Definitions

  • the present invention relates to a scroll compressor having a housing composed of a plurality of housing sections, including
  • a motor housing section in which are configured a drive motor having a housing-fixed stator and a main shaft-fixed, coaxial rotor mounted on one side of the stator by a first main shaft bearing;
  • a bearing housing section which adjoins the motor housing section on the side facing away from the first main shaft bearing and which supports a second main shaft bearing as well as an orbital guide of a first spiral displacer, which is eccentrically coupled to the main shaft and orbits in response to the rotation thereof, and into which axially engages a housing-fixed, second spiral displacer;
  • a housing cover which adjoins the bearing housing section and terminates the housing.
  • the present invention also relates to a method for assembling such a scroll compressor.
  • Scroll compressors are generally known to one skilled in the art for compressing gases, in particular gaseous refrigerant. They are frequently used as compressors in refrigeration installations in general and in motor vehicle air-conditioning systems, in particular.
  • the basic function thereof is based on the special reciprocal action of two spiral displacers.
  • a spiral displacer is essentially composed of a base plate from which a spiral rib extends upwardly. Two such spiral displacers having correspondingly shaped spiral ribs are positioned opposite one another in a way that allows the spiral ribs thereof to intermesh axially. One of the spiral displacers is thereby housing-fixed.
  • the other spiral displacer executes what is commonly known as an orbiting motion, i.e., it describes a circular motion about the central axis.
  • the compressor space formed between the intermeshing spiral ribs changes periodically in a way that induces gas into the radially outer region of the spiral displacer, conveying it under continuous compression to the spiral center.
  • a pressure relief valve Located there in the stationary spiral displacer is a pressure relief valve, which extends through the base plate thereof and through which the compressed gas is released into a pressure accumulator chamber. From there, it can be conveyed for application-specific use.
  • a scroll connector having a three-section housing, which is divided into a two-section outer housing and a one-section inner housing, is known from the above-mentioned generic publication.
  • the outer housing is composed of a motor housing section and a housing cover.
  • the motor housing section is essentially used for accommodating an electric motor designed as an internal-rotor motor having a housing-fixed stator and a rotatable rotor.
  • the rotor is fixed to a main shaft, which is supported at the closed end of the motor housing section in a radial bearing in the form of a floating bearing.
  • the domed housing cover is placed at the open end of the motor housing section and screw fastened thereto.
  • the spiral displacers are placed in the cavity formed by the housing cover.
  • the stationary spiral displacer which is referred to here as the second spiral displacer, is screw fastened to the housing cover.
  • the orbiting spiral displacer which is referred to here as the first spiral displacer, is eccentrically coupled to the main shaft that projects beyond the stator.
  • the main shaft is supported by a second main shaft bearing in a bearing housing section formed as the inner housing in the case of the known scroll compressor.
  • the bearing housing section features a guide for the orbiting, first spiral displacer.
  • the bearing housing section is clamped between a mounting flange of the motor housing section and radially outer axial extensions of the stationary spiral displacer.
  • This embodiment makes possible a method for assembling such a scroll compressor, which includes the following steps:
  • a module in a separate process including the bearing housing section having the preassembled, second main shaft bearing, the preassembled main shaft, and the rotor fixed thereto as well as the preassembled, first spiral displacer and the second spiral displacer directly connected to the bearing housing section, and rotationally driving the main shaft when the bearing housing section is fixed, measuring imbalances, and balancing the module;
  • the motor housing section having the preassembled stator and the preassembled first main shaft bearing and inserting the balanced module into the motor housing section, the main shaft being inserted into the first main shaft bearing, so that the rotor is positioned concentrically within the stator while maintaining an air gap;
  • the stationary, second spiral displacer is not fixed to the housing cover, but to the bearing housing section.
  • This module represents the heart of the scroll displacer, which may be provided in a separate process and checked for the functional performance thereof, in particular for the precise adjustment thereof, independently of remaining components. This may be advantageously accomplished by clamping the bearing housing section in place and by a temporarily connected drive motor rotationally driving the main shaft.
  • any thereby occurring imbalances may be immediately corrected without requiring any outlay for disassembly, in particular of a housing that impedes access to the components in question.
  • Such a functional test is performed very advantageously, namely in the context of the method of the present invention, where the rotor is already fixed to the main shaft. Alone by the mass thereof, the rotor introduces, namely, a significant potential for imbalance into the system. Therefore, during the manufacture thereof, it is known to provide the rotor with balancing weights which are then removed as needed or reduced by removing material in the course of the functional test explained above. All of this may be accomplished prior to the final assembly on the aforementioned module that is provided in a separate process.
  • the balanced module may then be inserted into the motor housing section provided together with the stator and the first main shaft bearing. If the motor housing section is properly preassembled, the rotor is thereby automatically positioned to rotate coaxially within the stator while maintaining a small air gap. Subsequently thereto, the housing cover may be placed and fixed in position.
  • the inventive connection between the spiral displacer and the bearing housing section is preferably implemented by screw fastening. It is especially preferred that the screw fastening be realized by a plurality of screws which pass axially through a wall of the bearing housing section and are screwed in place into threaded holes in the second spiral displacer.
  • the screw heads face the motor housing section in this specific embodiment. Therefore, they are not accessible if only the housing cover is removed from a final assembled scroll compressor.
  • this is not a disadvantage since the second spiral displacer is connected to the bearing housing section to form the discussed core module already at an early stage of assembly, as described above, and no further change is needed subsequently to adjustment and balancing.
  • the preferred orientation of the screws may be regarded as an advantageous measure to avoid inadvertently disassembling the module.
  • a further advantage in the aforementioned orientation also resides in the installation-space conditions, which, in the case of a generally likewise conceivable reverse orientation of the screws would be less favorable.
  • the preferred embodiment of the present invention provides that the outer wall of the bearing housing section form an axial portion of the wall of the (entire) housing.
  • the outer housing wall of the final assembled scroll compressor is composed of three axial portions, which are composed of the housing cover, the bearing housing section and the motor housing section (in this order). It would, in fact, also be fundamentally conceivable that the housing cover and/or the motor housing section arch over the bearing housing section radially outwardly in the axial direction, making it possible for the bearing housing section to be in the form of an inner housing, as in the related art. In terms of the radial installation-space conditions, however, this is less favorable than the preferred embodiment of the present invention.
  • the bearing housing section is preferably fixed by clamping the bearing housing section between the housing cover and the motor housing section. This may be realized, in particular by the housing cover being fixed by screws which extend axially through the bearing housing section or the outer wall thereof to the motor housing section.
  • the interfaces between the individual housing sections i.e., the contact regions between the motor housing section and the bearing housing section, on the one hand, and the bearing housing section and the housing cover, on the other hand, are preferably each sealed by a crimp seal. Even slight manufacturing tolerances may be compensated for by using seals of this type. Moreover, the number of two crimp seals represents an advantageous compromise between ease of assembly, on the one hand, and operational dependability of the seal [(sic.) seals], on the other.
  • FIG. 1 shows a sectional view through a scroll compressor according to the present invention in the final assembly state
  • FIG. 2 is a sectional view of the scroll compressor of FIG. 1 in a 90° offset sectional plane;
  • FIG. 3 is a sectional view of the core module of the scroll compressor of FIGS. 1 and 2 .
  • FIGS. 1 and 2 show a scroll compressor 10 according to the present invention.
  • the housing of scroll compressor 10 is composed of three housing sections, namely a motor housing section 12 , a bearing housing section 14 and a housing cover 16 .
  • the mentioned housing sections are fixed to one another by long screws 18 in the embodiment shown. Long screws 18 thereby extend through the outer walls of housing cover 16 and of bearing housing section and are screwed into the corresponding thread in motor housing section 12 .
  • bearing housing section 14 is clampingly held between motor housing section 12 and housing cover 16 .
  • the interfaces between the individual housing sections are each sealed by a crimp seal.
  • motor housing section 12 Positioned within motor housing section 12 is an electric motor, whose stator 20 is housing-fixed, and whose rotor 22 is fixed on a concentrically mounted main shaft 24 , so that it is pivotally mounted within stator 20 .
  • the mounting support of main shaft 24 in motor housing section 12 is implemented by a first main shaft bearing 26 , which is provided as a floating bearing at the closed side (on the left in FIGS. 1 and 2 ) of motor housing section 12 .
  • a second main shaft bearing 28 is provided in bearing housing section 14 , into which main shaft 24 extends.
  • main shaft 24 has an eccentric coupling 30 having an orbiting, first spiral displacer 32 .
  • first spiral displacer 32 is guided in corresponding guides 34 in bearing housing section 14 , and spiral rib thereof extends axially into the spiral rib of a stationary, second spiral displacer 36 .
  • Second spiral displacer 36 is directly connected by short screws 38 to bearing housing section 14 .
  • Adjusted and balanced module 100 may then be inserted into motor housing section 12 , which is preassembled to include stator 20 and first main shaft bearing 26 , and, following placement of housing cover 16 , fixed by long screws 18 .
  • housing cover 16 as an essential functional unit, accommodates merely pressure accumulator chamber 40 into which the gas compressed between spiral displacers 32 , 36 is conveyed.
  • bearing housing section 14 as an inner housing that is arched over radially outwardly in the axial direction by motor housing section 12 and/or by housing cover 16 , which then abut directly against one another. In this embodiment, it is possible to dispense with an interface to be sealed between the housing sections. On the other hand, in terms of the radial installation space, this variant is less favorable than that shown in FIGS. 1-3 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US16/982,474 2018-03-20 2019-02-26 Scroll compressor and method for assembling same Abandoned US20210040950A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018204278.0 2018-03-20
DE102018204278.0A DE102018204278B4 (de) 2018-03-20 2018-03-20 Spiralverdichter und Verfahren zu dessen Montage
PCT/EP2019/054750 WO2019179723A1 (de) 2018-03-20 2019-02-26 Scrollverdichter und verfahren zu dessen montage

Publications (1)

Publication Number Publication Date
US20210040950A1 true US20210040950A1 (en) 2021-02-11

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Application Number Title Priority Date Filing Date
US16/982,474 Abandoned US20210040950A1 (en) 2018-03-20 2019-02-26 Scroll compressor and method for assembling same

Country Status (6)

Country Link
US (1) US20210040950A1 (de)
EP (1) EP3768975A1 (de)
JP (1) JP2021513625A (de)
CN (1) CN111771060B (de)
DE (1) DE102018204278B4 (de)
WO (1) WO2019179723A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022119370A1 (de) 2022-08-02 2024-02-08 OET GmbH Verfahren zum Wuchten einer beweglichen Baugruppe einer Verdrängermaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0942170A (ja) * 1995-07-25 1997-02-10 Mitsubishi Heavy Ind Ltd スクロール型圧縮機

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Publication number Priority date Publication date Assignee Title
JP3109359B2 (ja) * 1993-12-24 2000-11-13 松下電器産業株式会社 密閉型スクロール圧縮機およびその組付け方法
JPH0942174A (ja) * 1995-07-27 1997-02-10 Mitsubishi Heavy Ind Ltd スクロール圧縮機
JP3685091B2 (ja) * 2001-06-08 2005-08-17 松下電器産業株式会社 電動機内蔵の圧縮機と、これを搭載した移動車
JP4053416B2 (ja) * 2002-12-16 2008-02-27 松下エコシステムズ株式会社 スクロール圧縮装置とその製造方法
JP4151404B2 (ja) * 2002-12-25 2008-09-17 株式会社豊田自動織機 圧縮機及び圧縮機のバランス取り方法
JP2004239153A (ja) * 2003-02-05 2004-08-26 Toyota Industries Corp 可動スクロール部材の製造方法、スクロール型流体機械の可動スクロール部材、スクロール型圧縮機及び可動スクロール部材用のワーク
JP2010133373A (ja) * 2008-12-08 2010-06-17 Mitsubishi Heavy Ind Ltd 圧縮機
JP5455707B2 (ja) * 2010-02-25 2014-03-26 三菱重工業株式会社 電動圧縮機およびその組立方法
JP5948562B2 (ja) * 2011-12-21 2016-07-06 パナソニックＩｐマネジメント株式会社 スクロール圧縮機
KR101462941B1 (ko) * 2012-03-07 2014-11-19 엘지전자 주식회사 횡형 스크롤 압축기
US10473096B2 (en) * 2013-03-15 2019-11-12 Agilent Technologies, Inc. Modular pump platform
JP2014190245A (ja) * 2013-03-27 2014-10-06 Keihin Corp スクロール型圧縮機
JP6190663B2 (ja) * 2013-08-23 2017-08-30 三菱重工オートモーティブサーマルシステムズ株式会社 スクロール圧縮機
CN104847660B (zh) * 2015-05-28 2017-03-01 郭辰 一种低压缩比全无油涡旋空气压缩机总成
DE102016204756B4 (de) * 2015-12-23 2024-01-11 OET GmbH Elektrischer Kältemittelantrieb
KR101892803B1 (ko) * 2016-04-26 2018-08-29 학교법인 두원학원 스크롤 압축기의 배압제어 수단

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH0942170A (ja) * 1995-07-25 1997-02-10 Mitsubishi Heavy Ind Ltd スクロール型圧縮機

Also Published As

Publication number Publication date
DE102018204278B4 (de) 2020-02-06
EP3768975A1 (de) 2021-01-27
CN111771060A (zh) 2020-10-13
DE102018204278A1 (de) 2019-09-26
WO2019179723A1 (de) 2019-09-26
CN111771060B (zh) 2022-11-01
JP2021513625A (ja) 2021-05-27

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