WO1999057439A1 - Vacuumpumpe - Google Patents
Vacuumpumpe Download PDFInfo
- Publication number
- WO1999057439A1 WO1999057439A1 PCT/EP1999/002882 EP9902882W WO9957439A1 WO 1999057439 A1 WO1999057439 A1 WO 1999057439A1 EP 9902882 W EP9902882 W EP 9902882W WO 9957439 A1 WO9957439 A1 WO 9957439A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotors
- pump chamber
- pump
- pump according
- pressure
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
- F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
-
- 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
- F04C29/122—Arrangements for supercharging the working space
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/123—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
Definitions
- the invention relates to a pump for the simultaneous generation of pressure and negative pressure.
- Pumps of this type are advantageous if an industrial process requires compressed air and negative pressure at the same time, since the pump only requires one drive.
- a separate charging connection which is connected to the atmosphere in order to ensure the volume flow for the compressed air. Accordingly, several separate cells must be formed in the pump chamber. In the prior art, this has only been achieved with rotary slide systems. However, rotary vane are subject to wear and can only be operated lubricant-free if special materials are used.
- two at least three-bladed rotors rotate in opposite directions about parallel, mutually offset axes in the pump chamber and mesh without contact in order to form cells which are separate from one another with the peripheral wall of the pump chamber.
- the rotors in the pump chamber can be used to separate the cells required for the simultaneous generation of compressed air and vacuum. Since the rotors are contactless with each other and also with the peripheral wall of the
- the pump according to the invention is particularly suitable for use in the paper processing industry, especially in applications which do not require separate provision or adjustment of compressed air and vacuum.
- Compressed air is e.g. needed to blow on a stack of paper to support sheet separation.
- the pulsating generation of compressed air by the pump according to the invention proves to be expedient here, since the paper edges can be separated more easily by compressed air which occurs intermittently. Vacuum is required in such applications to suck up the top sheet of paper.
- the rotors with the pump chamber form a suction cell which is connected to the suction connection and increases their volume due to the rotation of the rotors, and a pressure cell which reduces their volume when the rotors rotate and is connected to the pressure connection.
- This pressure cell is formed from two charging cells which are initially separated from one another in the course of the rotation of the rotors, each of which has an assigned charging connection and are combined with one another to form the pressure cell during the further rotation of the rotors.
- the charging cells are shifted essentially isobar and isochoric in the pump chamber, i.e. the air in the charging cells experiences essentially no change in pressure and no volume when the charging cells are displaced.
- FIG. 1 shows a longitudinal section of the pump according to the invention
- Figure 2 is a view along line II-II in Figure 1;
- Figure 3 is a view along line III-III in Figure 1;
- Figures 4a to 4h are schematic views of different rotor positions to explain the mode of operation. - 3 -
- the single-stage pump for the simultaneous generation of pressure and negative pressure has a housing which consists of a supporting central part 10, a housing cover 12 placed on one side of the central part 10, a housing ring 14 attached to the other side of the central part 10 and one on the housing ring
- a pump chamber 18 is formed between the middle part 10, the housing ring 14 and the cover plate 16.
- two shafts 20, 22 are mounted parallel to one another and offset from one another in ball bearings.
- a pinion 24, 26 is seated on each shaft 20, 22. The pinions 24, 26 are in meshing engagement with one another, so that the shafts 20, 22 rotate in opposite directions synchronously with one another.
- the lower shaft 22 is led out of the housing cover 12.
- Two rotors 30, 32 are arranged on the free ends of the shafts 20, 22 projecting into the pump chamber 14. Since the load application formed by the rotors 30, 32 is not between, but outside of the bearings, there is a flying shaft bearing. Each of the rotors 30, 32 is adjustably attached to the associated shaft 20 and 22, respectively. As can be seen from Figure 2, each rotor 30, 32 has three blades 30a and 32a.
- the pump chamber 18 has a side view in the form of two intersecting circles, which are joined together in the form of an "8".
- the blades 30a of the rotor 30 have a shape that is different from the shape of the blades 32a of the rotor 32.
- the geometry of the vanes 30a, 32a and the pump chamber 18 is determined in such a way that when the rotors 30, 32 rotate, a plurality of separate cells is formed, as explained in more detail below with reference to FIGS. 4a to 4h, in that the vanes 30a, 32a slide without contact with a sealing gap of a fraction of 1 mm one above the other and along the outer circumference of the pump chamber 18.
- the cover plate 16 is provided with a series of recesses, which are closed off from the outside by an attached closure plate 36.
- Two pipe sockets 42, 44 are screwed into the closure plate 36.
- the upper pipe socket 42 forms the suction connection and is connected to a recess 50 of the cover plate 16.
- the lower Pipe socket 44 forms the pressure connection and is connected to a recess 52 in the cover plate 16.
- Two further cutouts 54a, 54b in the cover plate 16 are open to the outside and form charging connections.
- FIG. 4a shows the rotors 30, 32 in a rotational position in which their wings 30a, 32a form a closed, common cell 60, which is only connected to the recess 50, with the wall of the pump chamber 18. As the rotors 30, 32 continue to rotate, this cell 60 increases its volume, as can be seen in FIG. 4b.
- This cell 60 is therefore a suction cell.
- FIG. 4c shows two cells 62a, 62b which are separate from one another and which arise immediately after the state shown in FIG. 4b in that the cell 60 has been separated into two sub-cells.
- the cell 62a assigned to the rotor 30 already borders the recess 54a, and the cell 62b assigned to the rotor 32 approaches the recess 54b.
- the cells 62a, 62b are connected to the recesses 54a and 54b leading to the atmosphere and are filled with air and charged to ambient pressure, so that the air mass flow is increased.
- the cells 62a, 62b are thus charging cells.
- the cells 62a, 62b are moved isobarically and isochorously until, as in FIG. 4f shown, combine with one another to form a pressure cell 64.
- the pressure cell 64 reduces its volume. The air compressed in the pressure cell 64 is pushed out via the cutout 52 to the pipe socket 44, as illustrated in FIGS. 4g and 4h.
- the pump chamber 18 is free of any lubricant, since the rotors 30, 32 operate without contact. On the drive side, the pump chamber 18 is sealed by seals on the shafts 20, 22.
- the housing can be equipped with cooling fins, and cooling air is guided from the cover plate 16 through the housing ring 14, the middle part 10 and the housing cover 12 by a cooling fan arranged on the side of the housing cover 12.
- a resonance damper which is matched to the operating frequency of the pump, is used to dampen the operating noise. Due to the three-wing design of the rotors, this frequency is three times the speed of the shafts 20, 22. The increased operating frequency makes it easier to accommodate the resonance damper, since its length is reduced accordingly.
- the described flying storage of the rotors is up to one
- Pumps with a larger volume flow are preferably designed with rotors mounted on both sides. In this case, connections are left in both side plates.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99923485A EP1075601B1 (de) | 1998-04-30 | 1999-04-28 | Vacuumpumpe |
DE59902761T DE59902761D1 (de) | 1998-04-30 | 1999-04-28 | Vacuumpumpe |
JP2000547364A JP2002513887A (ja) | 1998-04-30 | 1999-04-28 | 加圧−吸引ポンプ |
US09/673,641 US6439865B1 (en) | 1998-04-30 | 1999-04-28 | Vacuum pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19819538A DE19819538C2 (de) | 1998-04-30 | 1998-04-30 | Druck-Saug-Pumpe |
DE19819538.9 | 1998-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999057439A1 true WO1999057439A1 (de) | 1999-11-11 |
Family
ID=7866414
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/002882 WO1999057439A1 (de) | 1998-04-30 | 1999-04-28 | Vacuumpumpe |
PCT/EP1999/002881 WO1999057419A1 (de) | 1998-04-30 | 1999-04-28 | Drehkolbenmaschine mit dreiflügeligen rotoren |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/002881 WO1999057419A1 (de) | 1998-04-30 | 1999-04-28 | Drehkolbenmaschine mit dreiflügeligen rotoren |
Country Status (7)
Country | Link |
---|---|
US (2) | US6364642B1 (de) |
EP (2) | EP1075601B1 (de) |
JP (2) | JP2002513880A (de) |
KR (2) | KR100556077B1 (de) |
CN (2) | CN1105820C (de) |
DE (3) | DE19819538C2 (de) |
WO (2) | WO1999057439A1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20216504U1 (de) * | 2002-10-25 | 2003-03-06 | Werner Rietschle GmbH + Co. KG, 79650 Schopfheim | Verdrängermaschine mit gegensinnig laufenden Rotoren |
FR2859000B1 (fr) * | 2003-08-20 | 2005-09-30 | Renault Sa | Dent d'engrenage et pompe a engrenages exterieurs |
DE102004009639A1 (de) * | 2004-02-27 | 2005-09-15 | Rietschle Thomas Gmbh + Co. Kg | Drehzahnverdichter |
GB0410491D0 (en) * | 2004-05-11 | 2004-06-16 | Epicam Ltd | Rotary device |
EP1640613B1 (de) * | 2004-09-17 | 2006-11-29 | Aerzener Maschinenfabrik GmbH | Drehkolbenverdichter und Verfahren zum Betreiben eines Drehkolbenverdichters |
TW200848617A (en) * | 2007-06-08 | 2008-12-16 | Jaguar Prec Industry Co Ltd | Motor direct drive air pump, related applications and manufacturing methods thereof |
JP5725660B2 (ja) * | 2011-09-30 | 2015-05-27 | アネスト岩田株式会社 | クローポンプ |
EP2674570A1 (de) * | 2012-06-14 | 2013-12-18 | Bobby Boucher | Turbine mit gleich- und gegenläufigen Rotoren auf derselben Ebene |
CN103775341B (zh) * | 2012-10-15 | 2016-05-18 | 良峰塑胶机械股份有限公司 | 两外形相同的爪式转子对装置 |
WO2014123539A1 (en) | 2013-02-08 | 2014-08-14 | Halliburton Energy Services, Inc. | Electronic control multi-position icd |
DE102013112704B4 (de) | 2013-11-18 | 2022-01-13 | Pfeiffer Vacuum Gmbh | Gehäuse für eine Wälzkolbenpumpe |
US9605739B2 (en) * | 2014-04-11 | 2017-03-28 | Gpouer Co., Ltd. | Power transmission system |
JP6340556B2 (ja) * | 2015-02-12 | 2018-06-13 | オリオン機械株式会社 | 二軸回転ポンプ |
JP6221140B2 (ja) * | 2015-02-12 | 2017-11-01 | オリオン機械株式会社 | 二軸回転ポンプ |
JP6340557B2 (ja) * | 2015-02-12 | 2018-06-13 | オリオン機械株式会社 | 二軸回転ポンプ |
RU2611117C2 (ru) * | 2015-04-01 | 2017-02-21 | Евгений Михайлович Пузырёв | Роторная машина |
DE102018203992A1 (de) | 2018-03-15 | 2019-09-19 | Gardner Denver Schopfheim Gmbh | Drehkolbenmaschine |
CN109630411B (zh) * | 2018-12-06 | 2021-06-11 | 莱州市增峰石业有限公司 | 一种可变压缩比的增压器及应用和发动机调控技术 |
JP6749714B1 (ja) * | 2019-10-28 | 2020-09-02 | オリオン機械株式会社 | クローポンプ |
JP7109788B2 (ja) * | 2019-10-28 | 2022-08-01 | オリオン機械株式会社 | 回転ポンプ |
JP6845596B1 (ja) * | 2020-06-24 | 2021-03-17 | オリオン機械株式会社 | クローポンプ |
CN116517826B (zh) * | 2023-04-25 | 2024-03-22 | 北京通嘉宏瑞科技有限公司 | 一种转子组件及泵体结构 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB818691A (en) * | 1957-05-20 | 1959-08-19 | Lacy Hulbert & Company | Improvements in rotary air pumps |
US3199771A (en) * | 1961-10-19 | 1965-08-10 | Becker G M B H Geb | Multicell machine operating as a combination pressure-vacuum generator |
DE2422857A1 (de) * | 1974-05-10 | 1975-11-27 | Petr Terk | Maschine mit zentrisch gelagerten rotoren |
US4859158A (en) * | 1987-11-16 | 1989-08-22 | Weinbrecht John F | High ratio recirculating gas compressor |
EP0578853A1 (de) * | 1992-07-15 | 1994-01-19 | Mario Antonio Morselli | Umlaufmaschine mit conjugierten Profilen in kontinuierlicher Berührung |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE142587C (de) | ||||
DE564152C (de) * | 1931-11-22 | 1932-11-14 | Otto Becker Jr | Drehkolbengeblaese, insbesondere fuer Papierverarbeitungsmaschinen |
GB622873A (en) * | 1947-04-10 | 1949-05-09 | Thomas Desmond Hudson Andrews | Improvements in or relating to rotary blowers |
US2764407A (en) | 1951-10-03 | 1956-09-25 | Roland Offsetmaschf | Device for controlling the air in machines working with suction |
FR1147777A (fr) | 1956-04-19 | 1957-11-29 | Turbine volumétrique à deux rotors | |
US2967054A (en) | 1958-05-22 | 1961-01-03 | Mergenthaler Linotype Gmbh | Vacuum and pressure control valve for printing presses |
DE1133500B (de) | 1959-06-10 | 1962-07-19 | Polysius Gmbh | Roots-Geblaese |
US3182900A (en) * | 1962-11-23 | 1965-05-11 | Davey Compressor Co | Twin rotor compressor with mating external teeth |
DE1628347A1 (de) | 1967-01-19 | 1971-06-16 | Hubrich Christoph Dipl Ing | Innere Kuehlung eines im Unterdruckgebiet arbeitenden Rootsgeblaeses |
DE1915269A1 (de) | 1969-03-26 | 1970-10-08 | Siemens Ag | Roots-Geblaese |
US3628893A (en) * | 1970-05-04 | 1971-12-21 | Poerio Carpigiani | Liquid and air mixing gear pump |
DE2027272C2 (de) | 1970-06-03 | 1983-11-03 | Aerzener Maschinenfabrik Gmbh, 3251 Aerzen | Rotationskolbenverdichter |
AT317935B (de) * | 1971-02-03 | 1974-09-25 | Apaw Sa | Zahnradpumpe zur Herstellung von Luft-Flüssigkeitsgemischen, insbesondere in Softeis- und Schlagobersmaschinen od.dgl. |
NO137655C (no) * | 1974-06-14 | 1978-03-29 | Myrens Verksted As | Roterende fortrengningspumpe. |
US4480970A (en) * | 1981-05-30 | 1984-11-06 | Rolls-Royce Limited | Self priming gear pump |
DD209880A1 (de) | 1982-08-27 | 1984-05-23 | Halle Maschf Veb | Anordnung und gestaltung der aufladeeinlassoeffnungen an einem schraubenverdichter |
JPS62157289A (ja) * | 1985-12-29 | 1987-07-13 | Anretsuto:Kk | 高真空用ル−ツブロワ− |
EP0409287B1 (de) | 1987-05-15 | 1994-04-06 | Leybold Aktiengesellschaft | Vakuumpumpe mit Schöpfraum |
EP0370117B1 (de) | 1988-10-24 | 1994-01-12 | Leybold Aktiengesellschaft | Zweiwellenvakuumpumpe und Verfahren zu ihrem Betrieb |
GB2233042A (en) * | 1989-06-17 | 1991-01-02 | Fleming Thermodynamics Ltd | Screw expander/compressor |
FR2653831A1 (fr) * | 1989-11-02 | 1991-05-03 | Cit Alcatel | Pompe volumetrique. |
GB2243651A (en) * | 1990-05-05 | 1991-11-06 | Drum Eng Co Ltd | Rotary, positive displacement machine |
US5078583A (en) * | 1990-05-25 | 1992-01-07 | Eaton Corporation | Inlet port opening for a roots-type blower |
US5071328A (en) * | 1990-05-29 | 1991-12-10 | Schlictig Ralph C | Double rotor compressor with two stage inlets |
NL9002027A (nl) | 1990-09-14 | 1992-04-01 | Westera Beheer Bv | Inrichting voor het transport van papier, zoals in de vorm van vellen, in drukpersen, boekbindmachines en dergelijke. |
DE4118843A1 (de) | 1991-06-07 | 1993-02-11 | Sihi Gmbh & Co Kg | Fluessigkeitsringgaspumpe mit fliegend gelagertem fluegelrad |
DE4301907A1 (de) | 1993-01-25 | 1994-07-28 | Siemens Ag | Flüssigkeitsringmaschine |
-
1998
- 1998-04-30 DE DE19819538A patent/DE19819538C2/de not_active Revoked
-
1999
- 1999-04-28 CN CN99805637A patent/CN1105820C/zh not_active Expired - Fee Related
- 1999-04-28 JP JP2000547347A patent/JP2002513880A/ja active Pending
- 1999-04-28 US US09/673,640 patent/US6364642B1/en not_active Expired - Fee Related
- 1999-04-28 KR KR1020007011978A patent/KR100556077B1/ko not_active IP Right Cessation
- 1999-04-28 DE DE59906193T patent/DE59906193D1/de not_active Expired - Lifetime
- 1999-04-28 WO PCT/EP1999/002882 patent/WO1999057439A1/de active IP Right Grant
- 1999-04-28 EP EP99923485A patent/EP1075601B1/de not_active Expired - Lifetime
- 1999-04-28 CN CN99805636A patent/CN1128935C/zh not_active Expired - Fee Related
- 1999-04-28 DE DE59902761T patent/DE59902761D1/de not_active Expired - Lifetime
- 1999-04-28 WO PCT/EP1999/002881 patent/WO1999057419A1/de active IP Right Grant
- 1999-04-28 KR KR1020007011977A patent/KR100608527B1/ko not_active IP Right Cessation
- 1999-04-28 US US09/673,641 patent/US6439865B1/en not_active Expired - Fee Related
- 1999-04-28 EP EP99948559A patent/EP1076760B1/de not_active Expired - Lifetime
- 1999-04-28 JP JP2000547364A patent/JP2002513887A/ja not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB818691A (en) * | 1957-05-20 | 1959-08-19 | Lacy Hulbert & Company | Improvements in rotary air pumps |
US3199771A (en) * | 1961-10-19 | 1965-08-10 | Becker G M B H Geb | Multicell machine operating as a combination pressure-vacuum generator |
DE2422857A1 (de) * | 1974-05-10 | 1975-11-27 | Petr Terk | Maschine mit zentrisch gelagerten rotoren |
US4859158A (en) * | 1987-11-16 | 1989-08-22 | Weinbrecht John F | High ratio recirculating gas compressor |
EP0578853A1 (de) * | 1992-07-15 | 1994-01-19 | Mario Antonio Morselli | Umlaufmaschine mit conjugierten Profilen in kontinuierlicher Berührung |
Non-Patent Citations (1)
Title |
---|
GÜNTER LEUSCHNER: "Kleines Pumpenhandbuch für Chemie und Technik", 1967, VERLAG CHEMIE GMBH, WEINHEIM/BERGSTR., XP002113407 * |
Also Published As
Publication number | Publication date |
---|---|
KR20010043094A (ko) | 2001-05-25 |
DE19819538A1 (de) | 1999-11-11 |
CN1299434A (zh) | 2001-06-13 |
JP2002513880A (ja) | 2002-05-14 |
US6439865B1 (en) | 2002-08-27 |
JP2002513887A (ja) | 2002-05-14 |
EP1076760B1 (de) | 2003-07-02 |
WO1999057419A1 (de) | 1999-11-11 |
KR100556077B1 (ko) | 2006-03-07 |
CN1128935C (zh) | 2003-11-26 |
CN1299444A (zh) | 2001-06-13 |
EP1076760A1 (de) | 2001-02-21 |
DE59906193D1 (de) | 2003-08-07 |
US6364642B1 (en) | 2002-04-02 |
EP1075601B1 (de) | 2002-09-18 |
KR100608527B1 (ko) | 2006-08-09 |
CN1105820C (zh) | 2003-04-16 |
DE19819538C2 (de) | 2000-02-17 |
EP1075601A1 (de) | 2001-02-14 |
DE59902761D1 (de) | 2002-10-24 |
KR20010043093A (ko) | 2001-05-25 |
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