WO2010145633A2 - Pompe à vide - Google Patents

Pompe à vide Download PDF

Info

Publication number
WO2010145633A2
WO2010145633A2 PCT/DE2010/000620 DE2010000620W WO2010145633A2 WO 2010145633 A2 WO2010145633 A2 WO 2010145633A2 DE 2010000620 W DE2010000620 W DE 2010000620W WO 2010145633 A2 WO2010145633 A2 WO 2010145633A2
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum pump
pump according
valve
plastic layer
valve spring
Prior art date
Application number
PCT/DE2010/000620
Other languages
German (de)
English (en)
Other versions
WO2010145633A3 (fr
Inventor
Christoph Heidemeyer
Alexander Freiburg
Ralf Friedmann
Daniel Müller
Original Assignee
Ixetic Hückeswagen Gmbh
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 Ixetic Hückeswagen Gmbh filed Critical Ixetic Hückeswagen Gmbh
Priority to DE112010002592T priority Critical patent/DE112010002592A5/de
Publication of WO2010145633A2 publication Critical patent/WO2010145633A2/fr
Publication of WO2010145633A3 publication Critical patent/WO2010145633A3/fr

Links

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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • 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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F04C29/0035—Equalization of pressure pulses
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves

Definitions

  • the invention relates to a vacuum pump with a pressure chamber in which an overpressure is generated during operation of the vacuum pump, which is degradable via an outlet valve.
  • the vacuum pump is preferably designed as a vane pump, as disclosed, for example, in International Publication WO 2004/074687 A2. Vacuum pumps are used in motor vehicles, for example, to generate a vacuum in a brake booster.
  • the object of the invention is to reduce unwanted noise during operation of a vacuum pump with a pressure chamber in which an overpressure is generated during operation of the vacuum pump, which is degradable via an outlet valve.
  • the object is achieved in a vacuum pump with a pressure chamber in which during operation of the vacuum pump, an overpressure is degradable via an outlet valve, achieved in that at least one metal part of the exhaust valve to improve the sealing and / or damping properties has at least one plastic layer ,
  • the metal part is preferably a sheet metal part, in particular a valve spring or a valve holder.
  • the plastic layer is preferably formed of an elastomeric plastic material and is also referred to as a rubber layer.
  • the or an additional plastic layer may be provided in the interior of the metal part in order to improve the damping properties, without the plastic layer being worn out by coming into contact with other metal parts.
  • the plastic layer unwanted noise, which are generated by a vibration excitation of the metal part in the operation of the vacuum pump can be attenuated.
  • a preferred embodiment of the vacuum pump is characterized in that the metal part is a valve spring, which closes in a closed state, at least one outlet opening, from which it lifts off when opened.
  • the opening of the valve spring is caused by the pressure in the pressure chamber of the vacuum pump.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve spring is provided on its side facing the outlet opening with a plastic layer.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve spring is provided on its side facing away from the outlet opening with a plastic layer.
  • valve spring comprises at least one metal layer.
  • the metal layer is preferably formed from sheet metal and may be provided on one or both sides with a plastic layer.
  • the valve spring may also comprise a plurality of metal layers of the same material or different materials.
  • a further preferred embodiment of the vacuum pump is characterized in that the metal layer has a thickness of slightly less than one millimeter.
  • the metal layer has a thickness of 0.2 millimeters with a tolerance of plus / minus 0.015 millimeters.
  • a further preferred embodiment of the vacuum pump is characterized in that the metal layer is formed from spring steel sheet.
  • the spring steel sheet is provided according to an essential aspect of the invention on one side or on both sides with a plastic layer.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve spring is designed as a flat shape spring.
  • the flat form spring lies in the built condition on the outlet port of the vacuum pump. Depending on the pressure in the pressure chamber of the vacuum pump, the flat-form spring lifts off from the outlet opening, so that the overpressure in the pressure chamber of the vacuum pump is reduced via the opened outlet opening.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve spring comprises two metal layers, between which a plastic layer is arranged.
  • This arrangement has the advantage that the plastic layer does not come into contact with other metal parts during operation of the vacuum pump. This prevents unwanted wear of the plastic layer.
  • a further preferred embodiment of the vacuum pump is characterized in that the plastic layer of the valve spring has a thickness of 25 to 50 micrometers. This thickness has been found to be particularly advantageous in experiments carried out in the context of the present invention.
  • a further preferred embodiment of the vacuum pump is characterized in that the metal part is a valve holder which limits the opening movement of the valve spring or a valve spring.
  • the valve holder is preferably formed of sheet metal and, for example by means of a screw, attached to the vacuum pump in the region of the outlet opening.
  • the valve holder is preferably angled away from the outlet opening such that the valve spring strikes against the valve holder when it is opened. This prevents the valve spring from undergoing excessive deflection when it is opened.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve holder is provided on its valve spring side facing side with a plastic layer.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve holder is provided on its side facing away from the valve spring with a plastic layer.
  • This arrangement has the advantage that the plastic layer does not wear out by coming into contact with the valve spring. By this arrangement, the internal damping of the valve holder can be significantly increased.
  • the valve holder can also be provided on both sides with the plastic layer.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve holder comprises at least one metal layer.
  • the metal layer is preferably formed from sheet metal and coated on at least one side with plastic.
  • a further preferred embodiment of the vacuum pump is characterized in that the metal layer has a thickness of 0.4 to 1, 25 millimeters. This thickness has been found to be particularly advantageous in experiments carried out in the context of the present invention.
  • a further preferred embodiment of the vacuum pump is characterized in that the metal layer is formed from sheet steel.
  • Another preferred embodiment of the vacuum pump is characterized in that the metal layer is formed of a stainless stainless steel.
  • the shape of the valve holder is preferably adapted to the shape of the valve spring.
  • a further preferred embodiment of the vacuum pump is characterized in that the valve holder comprises two metal layers, between which a plastic layer is arranged. This arrangement has the advantage that the plastic layer is protected inside the valve holder and is exposed to less wear.
  • a further preferred embodiment of the vacuum pump is characterized in that the plastic layer of the valve holder has a thickness of 25 to 50 micrometers. This thickness has been found to be particularly advantageous in experiments carried out in the context of the present invention.
  • a further preferred embodiment of the vacuum pump is characterized in that the plastic layer is formed from an elastomeric plastic material. This is preferably a rubber-like plastic material, which is also referred to as rubber.
  • Figure 1 is a vacuum pump in the open state without a lid in front view
  • FIG. 2 shows the vacuum pump from FIG. 1 in the rear view
  • Figure 3 is a sectional view taken along the line HI-III in Figure 2;
  • Figure 4 is a sectional view taken along the line IV-IV in Figure 2;
  • FIG. 5 is an enlarged detail V of Figure 4.
  • Figure 6 is a valve spring of the vacuum pump of Figures 1 to 5 in plan view
  • Figure 7 shows the valve spring of Figure 6 in front view.
  • a vacuum pump 1 is shown in various views and sections.
  • the vacuum pump 1 comprises a housing 2 with a housing pot 4 and a cover 5. Outside the housing pot 4, an inlet nozzle 6 is provided, via which a working medium, such as air, is sucked into a working space 8 in the interior of the housing 2, when the vacuum pump 1 is driven.
  • a working medium such as air
  • the working space 8 is limited in the radial direction by a circulation contour 10, which is also referred to as a stroke contour.
  • a circulation contour 10 which is also referred to as a stroke contour.
  • the working space 8 is bounded by the bottom of the housing pot 4 and the lid 5.
  • a wing 12 is driven by a rotor 14.
  • the wing 12 is guided in a wing receiving slot of the rotor 14 within the circulation contour 10 slidably.
  • At the ends of the wing 12 caps are attached, which abut the circulation contour 10.
  • the rotor 14 hugs with its outer contour in a Schmiegespalt 16 to the circulation contour 10th
  • the suction chamber 18 is also referred to as a suction chamber.
  • the pressure chamber 20 is also referred to as a pressure chamber.
  • the suction space 18 communicates with the inlet port 6 of the vacuum pump 1 in conjunction.
  • the working fluid, in particular air sucked into the suction chamber 18 and mixed with lubricant, in particular with oil, to form an air-lubricant mixture and pressurized in the pressure chamber 20.
  • the working space 8 in the interior of the vacuum pump 1 is connected via two outlet openings 21, 22 with the environment of the vacuum pump 1, in particular with a crankcase of an internal combustion engine of the motor vehicle, in connection.
  • the outlet opening 21 connects the pressure space 20 with the surroundings of the vacuum pump 1.
  • the outlet opening 22 connects the suction space 18 with the environment of the vacuum pump 1.
  • the second outlet opening 22 allows a pressure reduction when the rotor 14 rotates with the wing 12 against its normal operating direction of rotation , This prevents undesired damage to the vacuum pump 1.
  • the normal direction of rotation of the vacuum pump 1 is indicated in Figure 2 by an arrow 24.
  • the two outlet openings 21, 22 are closed by an outlet valve 25, which comprises a valve holder 28 which is fastened by means of a screw 30 between the two outlet openings 21 and 22 at the bottom of the housing pot 4.
  • a valve spring 35 is arranged between the bottom of the housing pot 4 and the valve holder 28, .
  • the valve spring 35 is designed as a flat-form spring and closes in its closed position the two outlet openings 21, 22.
  • the valve spring 35 lifts off from the corresponding outlet opening 21, 22 to allow a pressure reduction in the environment of the vacuum pump 1 ,
  • the valve holder 28 is angled at an angle of about ten degrees of the valve spring 35. By the valve holder 28, the movement of the valve spring 35 is limited when opening.
  • the valve holder 28 comprises two metal layers 41 and 42, between which a plastic layer 45 is arranged.
  • the two metal layers 41, 42 are preferably formed from sheet steel.
  • the plastic layer 45 is preferably formed from an elastomeric plastic material. The plastic layer 45 can significantly reduce noise caused by impact of the valve spring 35 on the valve holder 28. Alternatively or additionally, the or an additional plastic layer on the valve spring 35 facing and / or facing away from the valve holder 28 may be provided.
  • the two metal layers 41 and 42 preferably each have a thickness of 0.4 to 1, 25 millimeters.
  • the plastic layer 45 preferably has a thickness of 25 to 50 micrometers.
  • the sandwich material with the plastic layer 45 arranged between the two metal layers 41, 42 has proved to be particularly advantageous with regard to the damping of vibrations excited by the valve spring 35.
  • valve spring 35 is shown in two different views.
  • the valve spring 35 has substantially the shape of a circular arc.
  • the valve spring 35 has a through hole 62 which serves to fasten the valve spring 35 together with the valve holder 28 by means of the screw 30 at the bottom of the housing pot 4.
  • the valve spring 35 comprises two metal layers 71, 72, which are preferably formed from spring steel sheet. Between the two metal layers 71, 72, a plastic layer 75 is disposed of an elastomeric plastic material. By the plastic layer 75 unwanted noise when opening and closing the valve spring 35 can be significantly reduced. The arrangement of the plastic layer 75 between the two metal layers 71, 72, moreover, an undesirable wear of the plastic layer 75 can be prevented.
  • valve spring 35 externally with at least one or an additional plastic layer.
  • a plastic layer on the outlet openings 21, 22 facing side of the valve spring 35 the sealing of the outlet openings 21, 22 can be improved in the closed state of the valve spring 35.
  • an additional plastic layer on the valve holder 28 side facing the valve spring 35 undesirable impact noise when striking the valve spring 35 can be reduced to the valve holder 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne une pompe à vide comprenant une chambre de pression dans laquelle une surpression est créée lorsque la pompe à vide est en fonctionnement, cette surpression pouvant être réduite par l'intermédiaire d'une soupape de refoulement. L'invention est caractérisée en ce qu'au moins une partie métallique de la soupape de refoulement comporte au moins une couche de plastique destinée à améliorer les propriétés d'étanchéité et/ou d'amortissement.
PCT/DE2010/000620 2009-06-17 2010-06-02 Pompe à vide WO2010145633A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112010002592T DE112010002592A5 (de) 2009-06-17 2010-06-02 Auslassventil aus verschiedenen materialschichten für eine vakuumpumpe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025138.3 2009-06-17
DE102009025138 2009-06-17

Publications (2)

Publication Number Publication Date
WO2010145633A2 true WO2010145633A2 (fr) 2010-12-23
WO2010145633A3 WO2010145633A3 (fr) 2011-09-15

Family

ID=43356802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000620 WO2010145633A2 (fr) 2009-06-17 2010-06-02 Pompe à vide

Country Status (2)

Country Link
DE (1) DE112010002592A5 (fr)
WO (1) WO2010145633A2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090715A1 (fr) 2013-12-17 2015-06-25 Magna Powertrain Bad Homburg GmbH Soupape d'échappement
WO2017050362A1 (fr) * 2015-09-23 2017-03-30 Pierburg Pump Technology Gmbh Pompe a vide de véhicule automobile
WO2017152939A1 (fr) * 2016-03-07 2017-09-14 Pierburg Pump Technology Gmbh Pompe à vide pour automobile
CN108138778A (zh) * 2015-11-02 2018-06-08 皮尔伯格泵技术有限责任公司 机动车真空泵
CN109209834A (zh) * 2017-06-29 2019-01-15 上海海立电器有限公司 一种应用于压缩机的排气阀片
CN111720319A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 旋转式压缩机的压缩机构
CN111720316A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 旋转式压缩机
CN111720317A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 压缩机构和具有它的旋转式压缩机
US20210332820A1 (en) * 2020-04-24 2021-10-28 Schwäbische Hüttenwerke Automotive GmbH Vacuum pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074687A2 (fr) 2003-02-20 2004-09-02 Luk Automobiltechnik Gmbh & Co. Kg Pompe a vide

Family Cites Families (7)

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US3040973A (en) * 1958-12-02 1962-06-26 Prec Scient Company Vacuum pump
GB1140452A (en) * 1966-03-16 1969-01-22 Edwards High Vacuum Int Ltd Improvements relating to liquid sealed mechanical vacuum pumps
CH553332A (de) * 1972-06-13 1974-08-30 Burckhardt Ag Maschf Einrichtung zur regulierung des arbeitsmitteldruckes in einer fluessigkeitsringpumpe.
JP2002242862A (ja) * 2001-02-20 2002-08-28 Fujitsu General Ltd スクロール圧縮機
DE102007018247A1 (de) * 2007-04-12 2008-10-16 Joma-Hydromechanic Gmbh Vakuumpumpe
WO2009018906A1 (fr) * 2007-08-04 2009-02-12 Ixetic Hückeswagen Gmbh Pompe à vide
CN201176937Y (zh) * 2008-04-23 2009-01-07 南京奥特佳冷机有限公司 静盘上带有降噪排气结构的电动汽车用涡旋式压缩机

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074687A2 (fr) 2003-02-20 2004-09-02 Luk Automobiltechnik Gmbh & Co. Kg Pompe a vide

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090715A1 (fr) 2013-12-17 2015-06-25 Magna Powertrain Bad Homburg GmbH Soupape d'échappement
US9863422B2 (en) 2013-12-17 2018-01-09 Magna Powertrain Bad Homburg GmbH Vacuum pump outlet valve
JP2018523780A (ja) * 2015-09-23 2018-08-23 ピアーブルグ パンプ テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＰｉｅｒｂｕｒｇ Ｐｕｍｐ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ 車両用真空ポンプ
WO2017050362A1 (fr) * 2015-09-23 2017-03-30 Pierburg Pump Technology Gmbh Pompe a vide de véhicule automobile
CN108026926A (zh) * 2015-09-23 2018-05-11 皮尔伯格泵技术有限责任公司 机动车-真空泵
US20180238331A1 (en) * 2015-11-02 2018-08-23 Pierburg Pump Technology Gmbh Motor vehicle vacuum pump
CN108138778A (zh) * 2015-11-02 2018-06-08 皮尔伯格泵技术有限责任公司 机动车真空泵
CN108138778B (zh) * 2015-11-02 2020-03-31 皮尔伯格泵技术有限责任公司 机动车真空泵
US11268514B2 (en) 2015-11-02 2022-03-08 Pierburg Pump Technology Gmbh Motor vehicle vacuum pump
WO2017152939A1 (fr) * 2016-03-07 2017-09-14 Pierburg Pump Technology Gmbh Pompe à vide pour automobile
US10982673B2 (en) 2016-03-07 2021-04-20 Pierburg Pump Technology Gmbh Automotive vacuum pump
CN109209834A (zh) * 2017-06-29 2019-01-15 上海海立电器有限公司 一种应用于压缩机的排气阀片
US20210332820A1 (en) * 2020-04-24 2021-10-28 Schwäbische Hüttenwerke Automotive GmbH Vacuum pump
US11927190B2 (en) * 2020-04-24 2024-03-12 Schwäbische Hüttenwerke Automotive GmbH Vacuum pump
CN111720319A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 旋转式压缩机的压缩机构
CN111720319B (zh) * 2020-06-29 2021-11-23 安徽美芝精密制造有限公司 旋转式压缩机的压缩机构
CN111720317B (zh) * 2020-06-29 2021-11-23 安徽美芝精密制造有限公司 压缩机构和具有它的旋转式压缩机
CN111720316B (zh) * 2020-06-29 2021-11-23 安徽美芝精密制造有限公司 旋转式压缩机
CN111720317A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 压缩机构和具有它的旋转式压缩机
CN111720316A (zh) * 2020-06-29 2020-09-29 安徽美芝精密制造有限公司 旋转式压缩机

Also Published As

Publication number Publication date
WO2010145633A3 (fr) 2011-09-15
DE112010002592A5 (de) 2012-11-29

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