WO2001038735A1 - Pompe a vide a piston - Google Patents

Pompe a vide a piston Download PDF

Info

Publication number
WO2001038735A1
WO2001038735A1 PCT/EP2000/010385 EP0010385W WO0138735A1 WO 2001038735 A1 WO2001038735 A1 WO 2001038735A1 EP 0010385 W EP0010385 W EP 0010385W WO 0138735 A1 WO0138735 A1 WO 0138735A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
elastic device
connecting rod
vacuum pump
bearing
Prior art date
Application number
PCT/EP2000/010385
Other languages
German (de)
English (en)
Inventor
Thomas Dreifert
Jürgen Meyer
Original Assignee
Leybold Vakuum 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 Leybold Vakuum Gmbh filed Critical Leybold Vakuum Gmbh
Priority to JP2001540051A priority Critical patent/JP2003515055A/ja
Priority to EP00972836A priority patent/EP1230484A1/fr
Publication of WO2001038735A1 publication Critical patent/WO2001038735A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/36—Engines with parts of combustion- or working-chamber walls resiliently yielding under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0044—Pulsation and noise damping means with vibration damping supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • F16J1/18—Securing of gudgeon-pins

Definitions

  • the noise source mentioned is of little importance for other machines equipped with crankshafts, such as compressors and motors, compared to other sources.
  • the lubricating film also dampens structure-borne noise in oil-lubricated piston machines. Such a lubricating film is not available with dry-running piston vacuum pumps.
  • the piston vacuum pump according to the invention is robust, reliable and insensitive to high temperatures. It ensures a reliable transmission of relatively high periodically changing piston forces and causes only a slight intervention in the adjacent components.
  • the elastic device can be arranged such that it carries the piston pin inside the piston, a piston bearing of the connecting rod being seated on the piston pin. Standard bearings can be used here.
  • An alternative possibility provides that the elastic device is arranged in the course of the connecting rod. Common bearings are also used here.
  • the elastic device is integrated in the piston bearing of the connecting rod. There are also numerous embodiments for this latter variant.
  • FIG. 1 is a schematic representation of the connection between the piston and piston pin in a first embodiment
  • FIG. 2 shows a schematic illustration of a second exemplary embodiment in which the elastic device is part of the connecting rod
  • FIG. 3 shows a schematic illustration of a third exemplary embodiment in which the elastic device is part of the piston
  • 4 shows a schematic illustration of a fourth exemplary embodiment in which the elastic device is part of the piston bearing
  • FIG. 6 shows a constructive embodiment of the example from FIG. 2,
  • Fig. 7 shows a constructive embodiment of the example of Fig. 3 and
  • FIGS. 1 A first figure.
  • the piston 10 of a piston vacuum pump is connected to a connecting rod 11 via a piston bearing 12.
  • the piston bearing 12 is located in the hollow interior 13 of the piston 10.
  • the piston 10 has an essentially cylindrical peripheral wall 14 and a flat end wall 15. The end of the piston 10 facing away from the end wall is open.
  • the connecting rod 11 projects through this end.
  • the connecting rod 11 is mounted on the piston pin 16, which runs parallel to the end wall 15 in the interior 13.
  • the piston pin 16 is supported on the end wall 15 by an elastic device EV, which in the present case consists of two elastomer cushions 17, 18.
  • the main direction of action of the elastic device EV is axially parallel to the piston 10.
  • the elastic device EV also has a damping function.
  • the piston pin 16 is mounted on the piston 10 with an elastic device EV.
  • the elastic device EV is located in the region of the peripheral wall 14 of the piston.
  • Fig. 5 shows a constructive embodiment of the example of Fig. 1 in a dry-running vacuum pump.
  • the piston bearing 12 includes a roller bearing 20, e.g. a needle bearing, which is arranged in a transverse bore of the head of the piston rod 11 and sits on the piston pin 16.
  • the roller bearing 20 has an outer ring 21, an inner ring 22 and rolling elements 23.
  • the piston pin 16 is fastened with damping bolts 24 and 25 on the inside of the end wall 15. These damping bolts contain the. Elastomer cushion 17 and 18 and form the elastic device EV.
  • FIG. 6 shows the implementation of the exemplary embodiment from FIG. 2.
  • the piston bearing 12 sits on the piston pin 16 and is inserted into a transverse bore in the head 26 of the connecting rod 11.
  • the elastic device EV is integrated in the connecting rod 11, namely directly adjacent to the head piece 26.
  • the head piece 26 is to this Purpose provided with a lug '27, which the connecting rod 11 is immersed in a fork-shaped receptacle 28th
  • elastomer cushions 29, 30 which form the elastic device EV. Shocks that act in the longitudinal direction of the connecting rod 11 produce shear stresses on the elastomer cushions 29.30.
  • Fig. 7 shows a practical embodiment of the diagram of Fig. 3.
  • the piston pin 16 is supported in transverse bores of the peripheral wall 14.
  • the elastic device EV sits in the transverse bores in the form of an elastomeric tube piece 31, which surrounds the end of the piston pin 16, or an arrangement of O-rings 32. This allows the piston pin 16 to move within limits transversely to its axial direction, while the elastic device EV is deformed.
  • the coupling between the connecting rod 11 and the piston pin 16 via the piston bearing 12 is a direct coupling without damping elements.
  • the figures 8 to 13 show different variants of the exemplary embodiment from FIG. 4.
  • a roller bearing 20 is mounted in the head 26 of the connecting rod 11, in which the piston pin 16 is mounted.
  • the piston pin 16 is provided with projecting arms 33 with which it is screwed onto the end wall 15. Furthermore, the piston pin 16 is provided with two circumferential grooves 34, 35, in each of which a few O-rings 36 sit, which form the elastic device EV.
  • the piston pin 16 has a diameter which is considerably smaller, so that the piston pin can move radially relative to the rolling bearing than the inside diameter of 'the inner ring of the rolling bearing 20th This radial movement is cushioned by the O-rings 36.
  • Fig. 9 shows an embodiment similar to that of Fig. 8, wherein the elastic device EV consists of an elastomer hose 38 which surrounds the piston pin 16 and is seated in the inner ring 22 of the rolling bearing.
  • the elastic device EV consists of chambered O-rings 40, which are each arranged in a circumferential groove of the piston pin 16 and protrude radially therefrom and support the inner ring 22 of the rolling bearing.
  • the elastic device EV is provided in the form of an elastomer hose 38 so that it surrounds the piston bearing 12.
  • the elastic device is thus located between the piston bearing 12 and the bore of the head piece 26.
  • materials for the elastic device include fluorine rubber FPM / FQM / FFKM (e.g. Viton), acrylic rubber ACM and silicone rubber VMQ / FVMQ / PVMQ.
  • Silicone rubber has the particular advantage of low internal damping, so that only a small amount of additional heat, which arises from periodic elastic deformation of the material, has to be dissipated and the material does not damage itself. Silicone components hardly change their properties and shape in the described installation situations, making them ideal for this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne une pompe à vide à piston dans laquelle la liaison entre le piston (10) et la bielle (11) commandant ledit piston, comprend un dispositif élastique (EV). Ceci permet de tenir le piston (10) à l'écart des oscillations et du bruit de structure de la bielle (11). On obtient ainsi une réduction significative du niveau sonore de la pompe et une plus longue durée de vie de palier.
PCT/EP2000/010385 1999-11-19 2000-10-21 Pompe a vide a piston WO2001038735A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001540051A JP2003515055A (ja) 1999-11-19 2000-10-21 ピストン真空ポンプ
EP00972836A EP1230484A1 (fr) 1999-11-19 2000-10-21 Pompe a vide a piston

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19955688.1 1999-11-19
DE19955688A DE19955688A1 (de) 1999-11-19 1999-11-19 Kolben-Vakuumpumpe

Publications (1)

Publication Number Publication Date
WO2001038735A1 true WO2001038735A1 (fr) 2001-05-31

Family

ID=7929619

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/010385 WO2001038735A1 (fr) 1999-11-19 2000-10-21 Pompe a vide a piston

Country Status (5)

Country Link
EP (1) EP1230484A1 (fr)
JP (1) JP2003515055A (fr)
DE (1) DE19955688A1 (fr)
TW (1) TW508409B (fr)
WO (1) WO2001038735A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042216C2 (de) * 2000-08-28 2002-09-19 Knorr Bremse Systeme Kolbenkompressor mit dynamisch massenausgeglichener Kurbelwelle, insbesondere für Schienenfahrzeuge (lösbare Ausgleichsmasse)
DE10042217C2 (de) * 2000-08-28 2002-06-20 Knorr Bremse Systeme Kolbenkompressor für Fahrzeuge (Kolbenbefestigungsanordnung)
DE10332642A1 (de) * 2003-07-18 2005-02-03 Leybold Vakuum Gmbh Oszillierende Vakuum-Verdrängerpumpe
DE102004020104A1 (de) * 2004-04-24 2005-11-17 Arnold Müller GmbH & Co KG Doppelkolben für einen Verdichter
DE102005001470B3 (de) * 2005-01-12 2006-07-20 Aerolas Gmbh, Aerostatische Lager- Lasertechnik Axial angetriebene Kolben-Zylinder-Einheit
DE102007005736A1 (de) * 2007-01-31 2008-08-14 Gardner Denver Thomas Gmbh Verdrängungs-Pumpe zur Förderung eines Fluids mit automatischer Anpassung an die Kompressibilität dieses Fluids
JP2013096345A (ja) * 2011-11-02 2013-05-20 Hitachi Koki Co Ltd 空気圧縮機
JP2014167276A (ja) * 2013-02-28 2014-09-11 Ikiken:Kk ロータリ式シリンダ装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR875416A (fr) * 1941-05-08 1942-09-21 Olaer Marine Perfectionnements aux pompes et aux compresseurs
DE2916847B1 (de) * 1979-04-26 1980-04-03 Messerschmitt Boelkow Blohm Einrichtung aus Kolben und Pleuelstange
EP0280264A2 (fr) 1987-02-27 1988-08-31 Commonwealth Scientific And Industrial Research Organisation Pompe à vide à plusieurs étages
US5529467A (en) * 1994-09-16 1996-06-25 Hewlett-Packard Company Connecting rod for a multiple compressor pump
WO1998006945A1 (fr) * 1996-08-09 1998-02-19 Wabco France Procede et dispositif de regulation de la pression d'un circuit de fluide et pompe a piston a cet effet
DE19634519A1 (de) 1996-08-27 1998-03-05 Leybold Vakuum Gmbh Kolbenvakuumpumpe mit Eintritt und Austritt
WO1998019067A1 (fr) * 1996-10-29 1998-05-07 Zanussi Elettromeccanica S.P.A. Piston pourvu d'une bielle liberable pour compresseurs de refrigeration

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE487138C (de) * 1929-11-29 Adolf Luethi Pleuelstange mit im Kolbeninnern angeordneten Stossdaempfungsfedern
DE471015C (de) * 1930-11-18 Paul Ermert Kurbel- o. dgl. Getriebe mit nachgiebigen Zwischengliedern zur Stossaufnahme
AT127666B (de) * 1929-11-29 1932-04-11 Karl Paul Rudolf Lein Nachgiebiges Zapfenlager für Verdindungsstangen.
DE1005318B (de) * 1955-01-17 1957-03-28 Mak Maschinenbau Kiel Ag Kolbenbolzen bei Zweitaktverbrennungskraftmaschinen
IT1128818B (it) * 1980-06-20 1986-06-04 Aspera Spa Manovellismo per piccole macchine alternative monocilindriche particolarmente compressori per frigoriferi
FI82973C (fi) * 1989-06-08 1991-05-10 Jyky Myynti Ky Anordning foer att roera en maskindel from och tillbaka.
FR2711198B1 (fr) * 1993-10-11 1996-01-26 Hutchinson Biellette de reprise de couple pour moteur de véhicule .
DE29501729U1 (de) * 1995-02-03 1995-03-30 Moser, Josef, 85435 Erding Pleuelstange einer Hubkolbenbrennkraftmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR875416A (fr) * 1941-05-08 1942-09-21 Olaer Marine Perfectionnements aux pompes et aux compresseurs
DE2916847B1 (de) * 1979-04-26 1980-04-03 Messerschmitt Boelkow Blohm Einrichtung aus Kolben und Pleuelstange
EP0280264A2 (fr) 1987-02-27 1988-08-31 Commonwealth Scientific And Industrial Research Organisation Pompe à vide à plusieurs étages
US5529467A (en) * 1994-09-16 1996-06-25 Hewlett-Packard Company Connecting rod for a multiple compressor pump
WO1998006945A1 (fr) * 1996-08-09 1998-02-19 Wabco France Procede et dispositif de regulation de la pression d'un circuit de fluide et pompe a piston a cet effet
DE19634519A1 (de) 1996-08-27 1998-03-05 Leybold Vakuum Gmbh Kolbenvakuumpumpe mit Eintritt und Austritt
WO1998019067A1 (fr) * 1996-10-29 1998-05-07 Zanussi Elettromeccanica S.P.A. Piston pourvu d'une bielle liberable pour compresseurs de refrigeration

Also Published As

Publication number Publication date
DE19955688A1 (de) 2001-05-23
EP1230484A1 (fr) 2002-08-14
TW508409B (en) 2002-11-01
JP2003515055A (ja) 2003-04-22

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