EP0030619B1 - Compresseur à rotor, en particulier compresseur à vis avec alimentation en lubrifiant et drainage du lubrifiant des paliers - Google Patents
Compresseur à rotor, en particulier compresseur à vis avec alimentation en lubrifiant et drainage du lubrifiant des paliers Download PDFInfo
- Publication number
- EP0030619B1 EP0030619B1 EP80106829A EP80106829A EP0030619B1 EP 0030619 B1 EP0030619 B1 EP 0030619B1 EP 80106829 A EP80106829 A EP 80106829A EP 80106829 A EP80106829 A EP 80106829A EP 0030619 B1 EP0030619 B1 EP 0030619B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- oil
- lubricating
- bearing
- drainage
- 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.)
- Expired
Links
- 239000000314 lubricant Substances 0.000 title claims description 21
- 239000003921 oil Substances 0.000 claims description 45
- 239000010687 lubricating oil Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 34
- 239000003507 refrigerant Substances 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
-
- 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
- F04C29/02—Lubrication; Lubricant separation
Definitions
- the invention relates to a rotary compressor, in particular a screw rotor compressor, in which each end of the shaft of the or each rotor is mounted in the housing by means of a radial sliding bearing and is surrounded by a shaft seal between the latter and the working space of the compressor, and a lubricating oil circuit is provided for bearing lubrication, with a lubricating oil container from which from which the lubricating oil is fed to the bearings via an oil pump and lines and into which the lubricating oil that flows from each bearing into a storage space on the side of the bearing facing away from the working space flows back via oil return channels.
- a compressor of this type is known from DE-OS 2 441 520, in which the annular drainage space is part of an elaborate sealing arrangement of great length, which has the purpose of sucking unfiltered outside air into the working space of the compressor and the leakage of lubricant. and to avoid coolant from the compressor working space along the shaft.
- the sealing arrangement has, in addition to the drainage space, further annular spaces, one of which is acted upon as a barrier pressure space by a compressed gas source, in particular by the compressor outlet.
- the annular drainage space opens up to the outside, and this means that the quantities of gas entering the drainage space from the barrier pressure space are lost.
- a length-increasing seal with sealing oil supply is arranged between the outer chamber and the bearing. Part of the sealing oil gets into the outer chamber, is drawn off together with the leak gas and must be separated from the leak gas by a cyclone separator. If a refrigerant is compressed, parts of it will dissolve in the sealing oil so that it is lost for reuse.
- the invention has for its object to provide a rotary compressor of the type mentioned, in particular for refrigerant compression, in which a very simple, cheap and space-saving seal arrangement between the work space and the bearing can be used and still both a leakage gas loss and an impairment of the lubricating oil circuit by under Pressure dissolving gas is avoided.
- a pressure compensation connection is provided between the lubricating oil circuit and the suction side of the compressor, through which the entire lubricating oil circuit on the suction side of the oil pump is essentially under the suction pressure of the compressor, and that between the The shaft seal and the bearing are arranged in a drainage space surrounding the shaft in a ring shape to collect lubricating oil escaping from the bearing on this side and any leakage gas that passes through the shaft seal, which is connected to the associated storage space via a drainage channel and thereby also under the suction pressure of the compressor stands.
- a second circuit for a coolant and sealant can be provided, which is fed to the working space of the compressor and is separated from the compressed gas stream by a separator connected to the pressure side of the compressor.
- a connecting line with a valve can be provided between the separator and the separating container of the lubricant circuit, which valve can be controlled by a level switch on the separating container.
- the compressor has a housing 10, in the working space 12 of which two rotors 14 are mounted next to one another, which engage in one another with helically arranged ribs and grooves. Only one of these rotors 14 is visible in the drawing.
- the shaft 16 of the rotor is supported at both ends by means of radial sliding bearings 18 and also at the end on the pressure side by means of an axial roller bearing 20.
- the shaft of one rotor, the main rotor is driven by a drive (not shown), and the main rotor drives the secondary rotor by direct meshing engagement or also by means of a synchronous gear (not shown).
- the gas to be compressed in particular a refrigerant such as difluoromonochloromethane, which in this case is under the evaporator pressure, is sucked in via the suction line 22 and the suction nozzle 24, compressed in the working chamber 12 by the rotors 14 and via the pressure nozzle 26 and the pressure line 28 as
- the separator and storage container serving pressure container 30 is supplied, from where it passes through the separating filter 32 and the pipeline 34 to the consumer and, in the case of refrigerants, to the condenser.
- oil or another liquid suitable as a coolant, sealant and lubricant which is supplied to the working space 12 by means of the line 36 via a cooler 38, a throttle element 40 and the housing bore 42 in order to close the rotors cool, seal against each other and against the housing and lubricate on their meshing flanks.
- This oil is discharged together with the compressed gas stream via the pressure port 26 and the pressure line 28 and separated from the gas stream in the container 30 and returned to the sump 44.
- oil is removed from a closed reservoir 46 via a pump 48 and a cooler 50 and fed to the lubricant bores of the bearings 18 via the line 52 and the housing channels 54. From these lubricant holes, the oil enters the bearing gap in both axial directions. A portion of the oil passes directly from the bearing gap into the oil collecting spaces 56, 58, which are connected to one another by a longitudinal channel 60 in the housing 10. The portion of the oil which occurs in the direction of the working space passes from the respective bearing 18 into an annular oil collecting groove 62 which is arranged as a drainage space between each bearing 18 and a sealing element 64 and is connected to the associated oil collecting space 56 and 58 by a channel 66 in each case is.
- the oil collecting space 56 is connected to the reservoir 46 via an outlet channel 68.
- the gas space of the reservoir 46 is also connected to the suction line 22 via a compensating line 70.
- the oil collecting groove 62 which is under low pressure and is arranged between each bearing 18 and the working space 12, effectively leaks oil from the bearing 18 to the working space 12 or vice versa, leaks gas from the working space 12 to the bearing 18 largely prevented.
- the additional sealing elements 64 are therefore not particularly demanding, it can be simple and very short elements such. B. act short labyrinths or swim rings. These can also be supplied with oil and lubricant pressure through appropriate housing bores, as shown for the pressure-side sealing element.
- the oil therein can only contain relatively small amounts of a soluble gas, e.g. B. refrigerant, dissolved.
- a soluble gas e.g. B. refrigerant
- the corresponding proportion in the reservoir 46 at a pressure of z. B. 5 bar and a temperature of 70 ° C significantly less than 5%, which practically does not affect the viscosity of the oil.
- a level switch 74 with lower and upper limit contact controls on the one hand a solenoid valve 76, which connects the line 36 to the reservoir 46, and also a solenoid valve 78, which connects the line 52 to the suction line 22 of the compressor.
- the solenoid valve 76 is opened and oil can get into the container 46 from the pressure container 30. If the oil level in the container 46 rises excessively, the valve 78 opens and excess oil from the container 46 enters the suction line and from there with the gas through the compressor into the reservoir pressure container 30.
- FIG. 2 shows a simplified embodiment for those applications in which there is no risk of the viscosity of the oil being reduced by dissolved gas because of low working pressures or with gases which are not soluble in oil.
- the same compressor design as in Fig. 1 can be used without structural changes.
- Is omitted and the outlet opening 68 of the oil collecting space 56, which is no longer required, is closed with a stopper 80.
- one of two bores 82, 84 is optionally opened, which connect the longitudinal channel 60 to the intake port 24 or the working chamber 12 of the compressor and of which the other bore or, when used according to FIG. 1, both bores with suitable ones Stopper 86 are closed.
- the resulting differential pressure between the pressure container 30 and the lubrication or injection points on the compressor is sufficient to the compressor to supply with oil without fear of gas breakthrough to the bearings due to the relatively low lubricant pressure in the bearing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary-Type Compressors (AREA)
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792948992 DE2948992A1 (de) | 1979-12-05 | 1979-12-05 | Rotorverdichter, insbesondere schraubenrotorverdichter, mit schmiermittelzufuhr zu und schmiermitteldrainage von den lagern |
DE2948992 | 1979-12-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0030619A1 EP0030619A1 (fr) | 1981-06-24 |
EP0030619B1 true EP0030619B1 (fr) | 1985-01-02 |
Family
ID=6087686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80106829A Expired EP0030619B1 (fr) | 1979-12-05 | 1980-11-06 | Compresseur à rotor, en particulier compresseur à vis avec alimentation en lubrifiant et drainage du lubrifiant des paliers |
Country Status (9)
Country | Link |
---|---|
US (1) | US4394113A (fr) |
EP (1) | EP0030619B1 (fr) |
JP (1) | JPS5688986A (fr) |
AR (1) | AR222589A1 (fr) |
AU (1) | AU537335B2 (fr) |
BR (1) | BR8007894A (fr) |
CA (1) | CA1156627A (fr) |
DE (2) | DE2948992A1 (fr) |
IN (1) | IN154526B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109458343A (zh) * | 2017-09-06 | 2019-03-12 | 株式会社神户制钢所 | 压缩装置 |
DE102020116771A1 (de) | 2020-06-25 | 2021-12-30 | Nidec Gpm Gmbh | Wellendichtring, insbesondere 2-stufiger Wellendichtring |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870336A (ja) * | 1981-10-21 | 1983-04-26 | Nec Corp | 情報処理装置 |
DE3150000A1 (de) * | 1981-12-17 | 1983-07-14 | Leybold-Heraeus GmbH, 5000 Köln | Oelgedichtete vakuumpumpe |
SE450150B (sv) * | 1982-04-13 | 1987-06-09 | Stal Refrigeration Ab | Kompressor av hermetisk typ |
AT378036B (de) * | 1983-04-11 | 1985-06-10 | Voest Alpine Ag | Verfahren zum bespruehen der meissel und/oder der ortsbrust mit druckfluessigkeit sowie vorrichtung zur durchfuehrung dieses verfahrens |
US4478054A (en) * | 1983-07-12 | 1984-10-23 | Dunham-Bush, Inc. | Helical screw rotary compressor for air conditioning system having improved oil management |
JPS6117191U (ja) * | 1984-07-04 | 1986-01-31 | 株式会社神戸製鋼所 | スクリユ圧縮機 |
SE445130B (sv) * | 1985-03-22 | 1986-06-02 | Svenska Rotor Maskiner Ab | Anordning vid skruvkompressorer for smorjning av ett rotorlager |
US5028220A (en) * | 1990-08-13 | 1991-07-02 | Sullair Corpoation | Cooling and lubrication system for a vacuum pump |
JP2530765B2 (ja) * | 1990-08-31 | 1996-09-04 | 株式会社神戸製鋼所 | 油冷式圧縮機の運転方法 |
CA2114454A1 (fr) * | 1994-01-28 | 1995-07-29 | Heinz Bauer | Compresseur |
SE503871C2 (sv) * | 1994-06-21 | 1996-09-23 | Svenska Rotor Maskiner Ab | Roterande deplacementskompressor med vätskecirkulationssystem |
DE59509083D1 (de) * | 1995-08-09 | 2001-04-12 | Escher Wyss Gmbh | Schmiersystem für Schraubenverdichtern |
US5642989A (en) * | 1995-10-13 | 1997-07-01 | National Compressed Air Canada Limited | Booster compressor system |
SE510066C2 (sv) * | 1997-08-25 | 1999-04-12 | Svenska Rotor Maskiner Ab | Oljefri skruvrotormaskin vilkens lager smörjes med en vattenhaltig vätska |
US6139280A (en) * | 1998-01-21 | 2000-10-31 | Compressor Systems, Inc. | Electric switch gauge for screw compressors |
US6318959B1 (en) * | 1998-12-22 | 2001-11-20 | Unozawa-Gumi Iron Works, Ltd. | Multi-stage rotary vacuum pump used for high temperature gas |
US6520758B1 (en) | 2001-10-24 | 2003-02-18 | Ingersoll-Rand Company | Screw compressor assembly and method including a rotor having a thrust piston |
BE1014461A3 (nl) * | 2001-11-08 | 2003-10-07 | Atlas Copco Airpower Nv | Oliegeinjecteerde schroefcompressor. |
ITVI20020083A1 (it) * | 2002-05-03 | 2003-11-03 | Virgilio Mietto | Gruppo serbatorio separatore aria/olio - valvola termostatica - valvola di minima pressione - radiatore di raffreddamento dell'olio - radiat |
US6672102B1 (en) * | 2002-11-27 | 2004-01-06 | Carrier Corporation | Oil recovery and lubrication system for screw compressor refrigeration machine |
US7165949B2 (en) * | 2004-06-03 | 2007-01-23 | Hamilton Sundstrand Corporation | Cavitation noise reduction system for a rotary screw vacuum pump |
BE1016581A3 (nl) * | 2005-02-22 | 2007-02-06 | Atlas Copco Airpower Nv | Verbeterd watergeinjecteerd schroefcompressorelement. |
JP2006291745A (ja) * | 2005-04-06 | 2006-10-26 | Hitachi Industrial Equipment Systems Co Ltd | 油冷式スクリュー圧縮機 |
JPWO2007000815A1 (ja) * | 2005-06-29 | 2009-01-22 | 株式会社前川製作所 | 二段スクリュー圧縮機の給油方法、装置及び冷凍装置の運転方法 |
JP5011297B2 (ja) * | 2005-08-25 | 2012-08-29 | アテリエ ビスク ソシエテ アノニム | ポンプケーシング |
US20090129956A1 (en) * | 2007-11-21 | 2009-05-21 | Jean-Louis Picouet | Compressor System and Method of Lubricating the Compressor System |
JP5103246B2 (ja) * | 2008-01-24 | 2012-12-19 | 株式会社神戸製鋼所 | スクリュ圧縮機 |
JP4431184B2 (ja) * | 2008-06-13 | 2010-03-10 | 株式会社神戸製鋼所 | スクリュ圧縮装置 |
JP4365443B1 (ja) * | 2008-07-29 | 2009-11-18 | 株式会社神戸製鋼所 | 無給油式スクリュ圧縮機 |
US8544453B2 (en) * | 2009-09-25 | 2013-10-01 | James E. Bell | Supercharger cooling |
US8752531B2 (en) * | 2009-09-25 | 2014-06-17 | James E. Bell | Supercharger cooling |
RU2445513C1 (ru) * | 2010-09-20 | 2012-03-20 | Закрытое акционерное общество "Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров им. В.Б. Шнеппа" | Винтовой маслозаполненный компрессорный агрегат |
US9568001B2 (en) * | 2012-09-14 | 2017-02-14 | Mayekawa Mfg. Co., Ltd. | Oil-cooled screw compressor system and oil-cooled screw compressor |
CA2912699C (fr) * | 2013-05-17 | 2021-05-25 | Victor Juchymenko | Procede et systeme d'etancheite d'equipements tournants tels que des detendeurs ou des compresseurs |
US9951761B2 (en) | 2014-01-16 | 2018-04-24 | Ingersoll-Rand Company | Aerodynamic pressure pulsation dampener |
DE102014101113A1 (de) * | 2014-01-30 | 2015-07-30 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
US10436104B2 (en) * | 2014-05-23 | 2019-10-08 | Eaton Intelligent Power Limited | Supercharger |
DE202014010816U1 (de) * | 2014-08-11 | 2016-09-21 | Jung & Co. Gerätebau GmbH | Schraubenspindelpumpe mit Dampfsperre |
US9828995B2 (en) * | 2014-10-23 | 2017-11-28 | Ghh Rand Schraubenkompressoren Gmbh | Compressor and oil drain system |
WO2016129083A1 (fr) * | 2015-02-12 | 2016-08-18 | 株式会社前川製作所 | Système de compresseur à vis refroidi à l'huile et son procédé de modification |
EP3387257A1 (fr) * | 2015-12-11 | 2018-10-17 | Atlas Copco Airpower | Procédé permettant de réguler l'injection de liquide d'un dispositif de compresseur ou de détendeur, dispositif de compresseur ou de détendeur à injection de liquide et un élément de compresseur ou de détendeur à injection de liquide |
JP6555840B2 (ja) * | 2016-03-03 | 2019-08-07 | 三菱重工コンプレッサ株式会社 | 圧縮機システム |
CA3016521A1 (fr) * | 2017-09-06 | 2019-03-06 | Joy Global Surface Mining Inc | Systeme de lubrification destine a un compresseur |
JP6836492B2 (ja) * | 2017-11-09 | 2021-03-03 | 株式会社神戸製鋼所 | 液冷式スクリュ圧縮機 |
JP7146478B2 (ja) | 2018-06-22 | 2022-10-04 | 株式会社神戸製鋼所 | スクリュー圧縮機及びガス圧縮システム |
CN108757453A (zh) * | 2018-08-23 | 2018-11-06 | 中山市捷科能机电科技有限公司 | 一种喷水双螺杆压缩机 |
AU2021202410A1 (en) | 2020-04-21 | 2021-11-11 | Joy Global Surface Mining Inc | Lubrication system for a compressor |
JP7451739B2 (ja) * | 2020-09-18 | 2024-03-18 | 株式会社日立産機システム | 給液式気体圧縮機 |
CN112594184A (zh) * | 2020-12-16 | 2021-04-02 | 衢州市智能制造技术与装备研究院 | 一种铝合金转子无油螺杆压缩机主机(单级) |
DE102021210221A1 (de) * | 2021-09-15 | 2023-03-16 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Kompressorölaufnahmevorrichtung und Kompressorsystem mit einer solchen Kompressorölaufnahmevorrichtung |
CN114352530B (zh) * | 2022-03-21 | 2022-06-07 | 天津捷盛东辉保鲜科技有限公司 | 高效能低噪音型制冷压缩机转子 |
JP2024025321A (ja) * | 2022-08-12 | 2024-02-26 | 株式会社日立産機システム | 油冷式スクリュー圧縮機 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE733959C (de) * | 1937-10-09 | 1943-04-06 | Klein Schanzlin & Becker Ag | Vorrichtung zum Abdichten von rotierenden Wellen fuer Verdichter, insbesondere fuer Drehkolbenverdichter der Vielzellenbauart |
US2721747A (en) * | 1951-12-21 | 1955-10-25 | Read Standard Corp | Hydraulic shaft seal |
FR1564294A (fr) * | 1967-05-03 | 1969-04-18 | ||
DD105868A1 (fr) * | 1973-08-30 | 1974-05-12 | ||
GB2020362A (en) * | 1978-03-13 | 1979-11-14 | Imi Fluidair Ltd | Rotary compressor |
Family Cites Families (15)
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DE471012C (de) * | 1925-06-06 | 1929-03-19 | Der Maschinenfabriken Escher A | Einrichtung zum Abdichten von insbesondere zum Foerdern von Gasen und Daempfen bestimmten Maschinen mit umlaufenden Wellen |
FR862570A (fr) * | 1939-01-11 | 1941-03-10 | Escher Wyss Ag | Compresseur à piston rotatif |
US2410172A (en) * | 1941-05-31 | 1946-10-29 | Jarvis C Marble | Rotary screw wheel apparatus |
GB846390A (en) * | 1956-11-14 | 1960-08-31 | Howden James & Co Ltd | Improvements in or relating to rotary compressors |
GB959831A (en) * | 1959-06-04 | 1964-06-03 | Svenska Rotor Maskiner Ab | Improvements in or relating to screw rotor machines |
US3073513A (en) * | 1960-04-26 | 1963-01-15 | Svenska Rotor Maskiner Ab | Rotary compressor |
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GB1484994A (en) * | 1973-09-03 | 1977-09-08 | Svenska Rotor Maskiner Ab | Shaft seal system for screw compressors |
US4080119A (en) * | 1974-06-24 | 1978-03-21 | Sven Evald Eriksson | Method and device for draining oil from the gear case of a compressor |
CA1074750A (fr) * | 1975-03-31 | 1980-04-01 | Sullair Corporation | Compresseur a vis et mode de fonctionnement |
JPS5334558Y2 (fr) * | 1975-07-17 | 1978-08-24 | ||
SE422349B (sv) * | 1977-11-28 | 1982-03-01 | Stal Refrigeration Ab | Oljeavskiljning vid en anleggning for att komprimera en gas |
DD137132B1 (de) * | 1978-06-13 | 1986-04-23 | Kuehlautomat Veb | Vorrichtung am oelueberfluteter schraubenverdichter |
-
1979
- 1979-12-05 DE DE19792948992 patent/DE2948992A1/de not_active Withdrawn
-
1980
- 1980-11-06 DE DE8080106829T patent/DE3069916D1/de not_active Expired
- 1980-11-06 EP EP80106829A patent/EP0030619B1/fr not_active Expired
- 1980-11-25 AU AU64685/80A patent/AU537335B2/en not_active Expired
- 1980-12-01 CA CA000365870A patent/CA1156627A/fr not_active Expired
- 1980-12-02 BR BR8007894A patent/BR8007894A/pt not_active IP Right Cessation
- 1980-12-03 JP JP16973880A patent/JPS5688986A/ja active Granted
- 1980-12-05 AR AR283498A patent/AR222589A1/es active
- 1980-12-05 US US06/213,722 patent/US4394113A/en not_active Expired - Lifetime
-
1981
- 1981-01-08 IN IN19/CAL/81A patent/IN154526B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE733959C (de) * | 1937-10-09 | 1943-04-06 | Klein Schanzlin & Becker Ag | Vorrichtung zum Abdichten von rotierenden Wellen fuer Verdichter, insbesondere fuer Drehkolbenverdichter der Vielzellenbauart |
US2721747A (en) * | 1951-12-21 | 1955-10-25 | Read Standard Corp | Hydraulic shaft seal |
FR1564294A (fr) * | 1967-05-03 | 1969-04-18 | ||
DD105868A1 (fr) * | 1973-08-30 | 1974-05-12 | ||
GB2020362A (en) * | 1978-03-13 | 1979-11-14 | Imi Fluidair Ltd | Rotary compressor |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109458343A (zh) * | 2017-09-06 | 2019-03-12 | 株式会社神户制钢所 | 压缩装置 |
CN109458343B (zh) * | 2017-09-06 | 2020-06-26 | 株式会社神户制钢所 | 压缩装置 |
DE102020116771A1 (de) | 2020-06-25 | 2021-12-30 | Nidec Gpm Gmbh | Wellendichtring, insbesondere 2-stufiger Wellendichtring |
WO2021259656A1 (fr) | 2020-06-25 | 2021-12-30 | Nidec Gpm Gmbh | Bague d'étanchéité d'arbre, en particulier bague d'étanchéité d'arbre à deux étages |
Also Published As
Publication number | Publication date |
---|---|
US4394113A (en) | 1983-07-19 |
AU537335B2 (en) | 1984-06-21 |
AU6468580A (en) | 1981-06-11 |
DE2948992A1 (de) | 1981-06-11 |
JPS5688986A (en) | 1981-07-18 |
BR8007894A (pt) | 1981-06-16 |
IN154526B (fr) | 1984-11-03 |
EP0030619A1 (fr) | 1981-06-24 |
CA1156627A (fr) | 1983-11-08 |
JPH0116350B2 (fr) | 1989-03-23 |
AR222589A1 (es) | 1981-05-29 |
DE3069916D1 (en) | 1985-02-14 |
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