EP1073845A1 - Machine volumetrique - Google Patents

Machine volumetrique

Info

Publication number
EP1073845A1
EP1073845A1 EP99910073A EP99910073A EP1073845A1 EP 1073845 A1 EP1073845 A1 EP 1073845A1 EP 99910073 A EP99910073 A EP 99910073A EP 99910073 A EP99910073 A EP 99910073A EP 1073845 A1 EP1073845 A1 EP 1073845A1
Authority
EP
European Patent Office
Prior art keywords
rotor
displacement machine
bearings
housing
rotors
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.)
Granted
Application number
EP99910073A
Other languages
German (de)
English (en)
Other versions
EP1073845B1 (fr
Inventor
Ulrich Becher
Andreas Basteck
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.)
Ateliers Busch SA
Original Assignee
Ateliers Busch 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 Ateliers Busch SA filed Critical Ateliers Busch SA
Priority to SI9930095T priority Critical patent/SI1073845T1/xx
Priority to EP99910073A priority patent/EP1073845B1/fr
Publication of EP1073845A1 publication Critical patent/EP1073845A1/fr
Application granted granted Critical
Publication of EP1073845B1 publication Critical patent/EP1073845B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F04C18/08—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
    • F04C18/14—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 toothed rotary pistons
    • F04C18/16—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • 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
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/086—Carter
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F04C2220/12—Dry running

Definitions

  • the invention relates to a displacement machine, in particular for use as a pump, with a working space formed in a housing, which is delimited by two end walls and a jacket and is accessible via an inlet and an outlet for a working medium and is movable with at least one in the housing arranged rotor dividing the work area and with a guide gear for rotor control and a drive device located outside the work area.
  • Such displacement machines are known in many different types. They can be designed and used both for supplying a pressure medium, for example air, and as vacuum pumps. In many areas of application for such machines, particularly in the packaging and food industries, the pressure medium must not be contaminated with oil. It is therefore essential that the machines do without oil in the work area.
  • the problem has been solved by geometries which allow the rotors to engage without contact, so that they do not have to be lubricated with oil.
  • the bearing of the rotors is more problematic, as will be explained in the following using some typical examples.
  • a second type of displacement machine works with hydrodynamic or hydrostatic bearings.
  • there are of course sealing problems as soon as the working medium must not be contaminated with lubricants. Overcoming these sealing problems requires increased construction costs, which undesirably increases the weight of the machine.
  • An example of a machine with hydrostatic bearings is described in European patent application EP 0 376 373 A1. In this type of displacement machine, the weight and the construction effort are increased even further by the devices necessary for applying the lubricant pressure.
  • a third type of displacement machine is equipped with magnetic bearings for the rotor shafts.
  • Such bearings already have a relatively high weight. Because of the relatively low forces that can be absorbed by magnetic bearings, the rotors have to be driven by separate, electronically synchronized motors and cannot be synchronized with a guide gear. In the event of a failure of the synchronization circuit, however, a mechanical emergency synchronization gear is often provided.
  • a fourth, widespread type of displacement machine works with rolling bearings that are conventionally lubricated and dynamically sealed against the work area.
  • the rotors are supported on both sides, as is shown, for example, in German Patent DE 37 06 588 C1.
  • the support length between the bearings is increased by the seals required to seal them.
  • the core diameter of the rotors must also be made correspondingly larger. This increases the size and weight of the machine.
  • the present invention has for its object to provide a positive displacement machine of the type mentioned, which can be manufactured with less effort and less weight than known generic positive displacement machines and which are operated in particular without special lubricants for the bearings.
  • This object is achieved in that the rotor or the rotors is or are at least partially supported within the working space and that the bearing or the bearings arranged within the working space are accessible to the working medium and are designed as roller bearings made of ceramic materials or are, whereby a lubricant-free operation of the displacement machine is possible.
  • the machine according to the invention can therefore be operated without special lubricants for the bearings and is therefore a Contamination of the working medium with lubricant is practically impossible.
  • the embodiment of the invention specified in claim 2 eliminates the need for sealing on both sides, thereby making it possible to reduce the spans between the bearings. This also reduces the effort involved in building the machine, as well as its weight and installation space.
  • the particularly preferred embodiment of the displacement machine according to the invention brings with it a simple, bilateral mounting of the rotors while reducing the spans, as well as operation without dynamic seals on the suction side and a general reduction in installation space. Dispensing with seals on the suction side is particularly advantageous in the case of vacuum pumps because failure of such a seal in a machine with conventionally lubricated bearings would lead to contamination of the working medium or to a breakdown of the vacuum.
  • the embodiment according to claim 4 also enables lubricant-free operation of the machine and a further reduction in the rotor spans.
  • the dynamic shaft seals are accessible and exchangeable from the outside in this embodiment.
  • FIG. 1 shows a longitudinal section through a displacement machine according to the prior art
  • FIG. 2 shows a longitudinal section through an exemplary embodiment of the displacement machine according to the invention.
  • FIG. 1 shows a longitudinal section through a displacement machine according to the prior art, which is intended for use as a pump.
  • a working space 2 is formed in a housing 1 and is separated by two end faces. walls 3, 4 and a coat 5 is limited.
  • the working medium for example air, is drawn into the working space via an inlet 6 and ejected through and through an outlet 7.
  • Two rotors 8, 9, which are provided on their sheath in a known manner with interlocking screw-shaped profiles, are rotatably arranged in the work area.
  • a guide gear 10, which is arranged outside the working area and driven by a drive device 11, ensures that the two rotors rotate in the opposite direction without contact.
  • the rotors 8 and 9 are each supported by two conventional roller bearings 12 and 13 in the end walls 3 and 4 and sealed against the working space 2 with seals 14 and 15.
  • the span that results from this arrangement is denoted by L1 in FIG.
  • the rotors 8 and 9 are supported in the working space 2 by roller bearings 16 and 17.
  • roller bearings 16 and 17 are made of ceramic materials that achieve a long service life without lubrication or with lubrication only through the working medium.
  • the rotors are thus mounted in the working space, which results in the span L2 which is considerably smaller than in the prior art shown in FIG.
  • the work space 2 only needs to be sealed on the side of the guide gear 10, which in the present example is achieved by the dynamic seal 18 arranged on the side of the bearing 17 facing away from the work space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne une machine volumétrique s'utilisant notamment comme pompe, qui présente une chambre de travail (2) formée dans un carter (1) et délimitée par deux parois frontales (3,4) et une enveloppe extérieure (5), à laquelle un milieu de travail peut accéder par l'intermédiaire d'une admission (6) et d'une sortie (7). Au moins un rotor (8) monté mobile dans le carter divise la chambre de travail et une transmission de guidage (10) prévue pour assurer la commande du rotor est reliée à un dispositif d'entraînement (11) situé en dehors de la chambre de travail. L'invention vise à mettre au point une machine volumétrique pouvant être produite de manière moins complexe et avec un poids plus réduit que les machines volumétriques connues de ce type, et pouvant notamment être actionnée sans nécessiter de lubrifiant particulier pour les paliers. A cet effet, il est prévu que le rotor ou les rotors soient montés au moins en partie dans la chambre de travail et que le(s) palier(s) (16,17) monté(s) dans la chambre de travail puisse(nt) être accessible(s) au milieu de travail et se présente(nt) sous forme de palier(s) à roulement en matériaux céramiques, ce qui permet un fonctionnement sans lubrifiant de la machine volumétrique et qui exclue en outre pratiquement tout risque de contamination du milieu de travail par un éventuel lubrifiant.
EP99910073A 1998-04-21 1999-04-01 Machine volumetrique Expired - Lifetime EP1073845B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI9930095T SI1073845T1 (en) 1998-04-21 1999-04-01 Positive displacement machine
EP99910073A EP1073845B1 (fr) 1998-04-21 1999-04-01 Machine volumetrique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98810350 1998-04-21
EP98810350A EP0952351A1 (fr) 1998-04-21 1998-04-21 Machine volumétrique
PCT/CH1999/000137 WO1999054627A1 (fr) 1998-04-21 1999-04-01 Machine volumetrique
EP99910073A EP1073845B1 (fr) 1998-04-21 1999-04-01 Machine volumetrique

Publications (2)

Publication Number Publication Date
EP1073845A1 true EP1073845A1 (fr) 2001-02-07
EP1073845B1 EP1073845B1 (fr) 2002-07-10

Family

ID=8236048

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98810350A Withdrawn EP0952351A1 (fr) 1998-04-21 1998-04-21 Machine volumétrique
EP99910073A Expired - Lifetime EP1073845B1 (fr) 1998-04-21 1999-04-01 Machine volumetrique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98810350A Withdrawn EP0952351A1 (fr) 1998-04-21 1998-04-21 Machine volumétrique

Country Status (15)

Country Link
US (1) US6354823B1 (fr)
EP (2) EP0952351A1 (fr)
JP (1) JP2002512345A (fr)
KR (1) KR100681477B1 (fr)
CN (1) CN1095040C (fr)
AT (1) ATE220448T1 (fr)
AU (1) AU2918999A (fr)
CA (1) CA2328718C (fr)
DE (1) DE59901994D1 (fr)
DK (1) DK1073845T3 (fr)
ES (1) ES2182495T3 (fr)
HK (1) HK1037020A1 (fr)
PT (1) PT1073845E (fr)
SI (1) SI1073845T1 (fr)
WO (1) WO1999054627A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI277694B (en) * 2002-02-28 2007-04-01 Teijin Seiki Co Ltd Vacuum exhausting apparatus
JP4321206B2 (ja) * 2003-10-17 2009-08-26 株式会社デンソー 気体圧縮装置
BE1016733A3 (nl) 2005-08-25 2007-05-08 Atlas Copco Airpower Nv Verbeterde lagedruk schroefcompressor.
CN100360804C (zh) * 2005-11-04 2008-01-09 浙江工业大学 一种外环流活塞泵
JP4670729B2 (ja) * 2006-05-08 2011-04-13 株式会社デンソー 気体圧縮機
DE102006035783A1 (de) * 2006-08-01 2008-02-07 Grasso Gmbh Refrigeration Technology Schraubenverdichter
US20090098003A1 (en) * 2007-10-11 2009-04-16 General Electric Company Multiphase screw pump
DE102010019635B4 (de) * 2010-05-06 2014-04-03 Multivac Sepp Haggenmüller Gmbh & Co. Kg Siegelstation für eine Verpackungsmaschine
CN103047142A (zh) * 2012-12-29 2013-04-17 中国科学院沈阳科学仪器股份有限公司 一种干气密封螺杆真空泵
GB2558954B (en) * 2017-01-24 2019-10-30 Edwards Ltd Pump sealing
RU208092U1 (ru) * 2021-02-09 2021-12-01 Акционерное общество "Научно-производственное предприятие "Рубин" (АО "НПП "Рубин") Газодувка объемная двухроторная трехлопастная

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Publication number Priority date Publication date Assignee Title
CH1737A (fr) 1890-01-17 1890-04-30 Cie Dubail Monnin Frossard Et Perfectionnement aux méchanismes de remontoirs des montres de poche
US1751703A (en) * 1927-11-03 1930-03-25 Daniel D Long Pump
US2633083A (en) * 1948-09-21 1953-03-31 Barnes Mfg Co Pump
US2705922A (en) * 1953-04-06 1955-04-12 Dresser Ind Fluid pump or motor of the rotary screw type
DE3124247C1 (de) * 1981-06-19 1983-06-01 Boge Kompressoren Otto Boge Gmbh & Co Kg, 4800 Bielefeld Schraubenverdichter
JPH0718421B2 (ja) * 1984-10-29 1995-03-06 株式会社日立製作所 回転式圧縮機の異常検出装置
US4674960A (en) * 1985-06-25 1987-06-23 Spectra-Physics, Inc. Sealed rotary compressor
DE3706588C2 (de) 1987-02-26 1993-12-02 Mannesmann Ag Antriebseinrichtung für Rotationskolbenverdichter
JPH01275914A (ja) * 1988-04-28 1989-11-06 Ulvac Corp 真空中駆動機構
JPH0240201A (ja) * 1988-07-29 1990-02-09 Tsumura & Co ロータリー・アトマイザー
NL8803199A (nl) 1988-12-29 1990-07-16 Skf Ind Trading & Dev Schroefcompressor.
US4975925A (en) * 1989-11-01 1990-12-04 The Spectranetics Corporation Unlubricated bearings for gas lasers
JPH04114360A (ja) * 1990-09-05 1992-04-15 Fujitsu Ltd ディスク装置
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Also Published As

Publication number Publication date
AU2918999A (en) 1999-11-08
CA2328718C (fr) 2008-02-19
DK1073845T3 (da) 2002-09-23
US6354823B1 (en) 2002-03-12
CA2328718A1 (fr) 1999-10-28
KR20010042719A (ko) 2001-05-25
CN1298474A (zh) 2001-06-06
PT1073845E (pt) 2002-11-29
EP0952351A1 (fr) 1999-10-27
KR100681477B1 (ko) 2007-02-09
WO1999054627A1 (fr) 1999-10-28
EP1073845B1 (fr) 2002-07-10
HK1037020A1 (en) 2002-01-25
DE59901994D1 (de) 2002-08-14
SI1073845T1 (en) 2002-10-31
ATE220448T1 (de) 2002-07-15
ES2182495T3 (es) 2003-03-01
JP2002512345A (ja) 2002-04-23
CN1095040C (zh) 2002-11-27

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