EP0459112A1 - Pompe à vide rotative à palettes - Google Patents

Pompe à vide rotative à palettes Download PDF

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Publication number
EP0459112A1
EP0459112A1 EP91105560A EP91105560A EP0459112A1 EP 0459112 A1 EP0459112 A1 EP 0459112A1 EP 91105560 A EP91105560 A EP 91105560A EP 91105560 A EP91105560 A EP 91105560A EP 0459112 A1 EP0459112 A1 EP 0459112A1
Authority
EP
European Patent Office
Prior art keywords
rotor
shaft
shaft journal
coupling
journal
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
EP91105560A
Other languages
German (de)
English (en)
Other versions
EP0459112B1 (fr
Inventor
Lutz Arndt
Peter Müller
Dieter Vorberg
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.)
Balzers und Leybold Deutschland Holding AG
Original Assignee
Leybold AG
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 AG filed Critical Leybold AG
Publication of EP0459112A1 publication Critical patent/EP0459112A1/fr
Application granted granted Critical
Publication of EP0459112B1 publication Critical patent/EP0459112B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7018—Interfitted members including separably interposed key
    • Y10T403/7021—Axially extending

Definitions

  • the invention relates to a rotary vane vacuum pump with a housing, with a rotor and with a drive motor coupled to the rotor, wherein both the rotor and the drive motor are each equipped with a shaft journal and both shaft journals are mounted in the area of their coupling in the housing.
  • connection of the drive motor to the rotor of a rotary vane vacuum pump and the oil sealing of the drive are usually realized with the help of a large number of components.
  • the coupling usually comprises two coupling halves and an elastomer element with feather keys and screw connections. Separate shields for the motor bearing and the rotor bearing as well as a clutch housing are provided. It is also necessary to equip the various shaft journals with shaft sealing rings. Shaft sealing ring bushings are usually used for this.
  • the individual components have to be manufactured separately, which is not only complex and therefore expensive, but can also lead to tolerance summations which impair the concentricity.
  • a rotary vane vacuum pump of the type mentioned is known.
  • the separately mounted motor shaft journal is equipped with a liner that is slidably mounted in a hole in the clutch housing.
  • the bushing is equipped with shaft sealing rings, between which there is a lubricant chamber.
  • the liner is connected to the bearing journal of the rotor via a pin coupling has an enlarged diameter.
  • runout deviations occur, which necessitates a soft mounting of the pin of the pin coupling in at least one of the parts to be coupled with one another. This further increases the cost of manufacture. Difficulties also arise in the supply of lubricant to the rotor bearing journal.
  • the present invention has for its object to make the connection between the drive motor and the pump rotor much simpler and cheaper.
  • this object is achieved in that the drive-side shaft journal of the rotor has the same diameter as the shaft journal of the drive motor, that the shaft journal of the rotor and the shaft journal of the drive motor are jointly mounted directly in a bearing bore, that two form a lubricant chamber for sealing the bearing bore Shaft sealing rings are provided, one of which is assigned to the rotor shaft journal and the other to the motor shaft journal, and that the rotor shaft journal and motor shaft journal are coupled to one another on the end face.
  • a separate end plate with a bearing for the motor is no longer required in the area of the coupling.
  • the problem related to the lubrication of the rotor bearing no longer exists.
  • the sealing ring assigned to the rotor shaft journal is located in immediate vicinity of the rotor or scoop chamber itself, so that there is no difficulty in operating the lubricant chamber between the sealing rings with full lubrication and the immediately adjacent scoop chamber with insufficient lubrication.
  • the invention therefore even makes it possible to arrange the high-vacuum stage, operated with very little oil, of a two-stage vacuum pump directly next to the clutch and bearing area, which is operated with full lubrication.
  • FIGS. 1 and 2 show sections through a rotary vane vacuum pump designed according to the invention.
  • the two-stage vacuum pump 1 shown in the figures as an exemplary embodiment comprises the actual pump housing 2, the oil box 3 surrounding the pump housing, the drive motor 4 and the outer housing or the hood 5.
  • the pump housing 2 and the drive motor 4 are fastened to a shield, which is supported on the floor by a base plate 7.
  • Part of the pump housing 2 is the one-piece pump ring 8, the opening of which has three areas 11, 12, 13 with different designs.
  • the rotor system 14 Inside the pump ring 8 is the rotor system 14, which is also made in one piece, with the sections 14a, 14b, and 14c.
  • the two outer sections 14a and 14c are equipped with slide slots 15, 16 accessible from the end faces and form the anchors of the high vacuum or fore vacuum stage.
  • the length and diameter of the middle section 14b of the rotor system 14 corresponds to the middle area 12 of the opening of the pump ring 8 in such a way that this area has the function of a sliding bearing for the rotor system 14.
  • the slide of the HV stage is designated by 18.
  • the area 11 of the pump ring 8 forms together with the front panel 19, the scoop 21 of the fore-vacuum (VV) stage.
  • the slide of the VV stage is designated 22.
  • the inlet channel of the HV stage is designated 23.
  • the channel leading from the outlet of the HV stage to the inlet of the VV stage is only shown in FIG. 2 and designated by 24.
  • the outlet valve 26 is assigned to the outlet channel 25 (FIG. 2) of the VV stage.
  • the outlet valve 26 is designed as a check valve and takes over the vacuum protection of the recipient in the event of a pump failure.
  • the valve 26 is arranged in the upper region of the pump housing 2. It is located at the bottom of a recess 27 which forms an intermediate oil sump during the operation of the vacuum pump.
  • the inlet port 31 of the vacuum pump shown is attached to the intermediate plate 6. It is connected to the inlet duct 23 of the HV stage via a bore 32 in the shield 6.
  • the outlet connector 33 is also provided on the shield 6. It is connected to the interior of the oil box 3 via a hole corresponding to the hole 32.
  • a dome 35 arranged on the front side of the oil box. Its central section 36 is transparent and serves to check the oil level in the oil box 3.
  • the dome 35 has an approximately semicircular cross section, the broad side of which faces the oil box 3. It extends over the entire height of the oil box 3, so that it can be equipped with the oil fill opening 37 and the oil drain opening 38.
  • the motor 4 is equipped with a blower 41 on its free end face.
  • the cooling air flow generated by this fan serves not only to cool the engine, but also to cool the oil box 3.
  • Both the motor housing and the oil box 3 are equipped with axially or horizontally running cooling fins 42 and 43, respectively.
  • the intermediate plate 6 also has the function of a clutch housing. It is provided with a bearing bore 51 in which a rotor shaft journal 52 arranged on the rotor system 14 and the shaft journal 53 of the drive motor 4 protrude therein and are mounted there. With the help of a pin coupling 54, the two shaft journals 52, 53 are coupled on the end face. Instead of the pin coupling, interlocking projections could also be provided in the area of the end faces of the shaft journals 52, 53. Both the rotor and the motor shaft journal can be slidably mounted in the bearing bore 51.
  • the pin or pins 54 of the pin coupling which extend in the axial direction and are arranged outside the axis of rotation, can be firmly embedded in their bores in the rotor shaft journal 52 while they engage in the bores of the motor shaft journal 53 with little play.
  • the motor shaft journal 53 can be mounted exclusively in the pins of the pin coupling.
  • Each of the shaft journals 52, 53 is assigned a shaft sealing ring 55, 56, the seat of which is also located in the clutch housing. These form a lubricant chamber 57, which contains the clutch and can be operated with full lubrication via the oil bore 58. Since the shaft seal ring 55 on the rotor side is in the immediate vicinity of the HV stage, the performance of this stage operated with insufficient lubrication is not impaired by lubricating oil.
  • the position of the oil bore 58 is shown in FIG. 2 by a dash-dotted line 59. It passes through - preferably inclined - the pump housing 2 and cuts the lubricant chamber 57 to be supplied with oil above the shaft journals 52, 53 or the coupling 54.
  • An axial groove 60 is expediently provided in the bearing and coupling housing 6 in this area. Oil enters the lubricant chamber 57 through the bore 58. Excess oil continues to flow through the bore 58 and flows into the deeper one located oil sump. The lubricating oil can never flow completely out of the lubricant chamber 57, so that the bearing and clutch according to the invention have particularly good emergency running properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
EP91105560A 1990-05-29 1991-04-09 Pompe à vide rotative à palettes Expired - Lifetime EP0459112B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4017194A DE4017194A1 (de) 1990-05-29 1990-05-29 Drehschiebervakuumpumpe
DE4017194 1990-05-29

Publications (2)

Publication Number Publication Date
EP0459112A1 true EP0459112A1 (fr) 1991-12-04
EP0459112B1 EP0459112B1 (fr) 1994-05-18

Family

ID=6407369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105560A Expired - Lifetime EP0459112B1 (fr) 1990-05-29 1991-04-09 Pompe à vide rotative à palettes

Country Status (4)

Country Link
US (1) US5156532A (fr)
EP (1) EP0459112B1 (fr)
JP (1) JPH04231697A (fr)
DE (3) DE9007544U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004221A1 (fr) * 1993-07-28 1995-02-09 Leybold Aktiengesellschaft Pompe a vide a palette a deux etages
IT201600132325A1 (it) * 2016-12-29 2018-06-29 Vhit S P A Soc Unipersonale Gruppo per vuoto
IT201600132428A1 (it) * 2016-12-29 2018-06-29 Vhit S P A Soc Unipersonale Gruppo per vuoto
WO2022053959A1 (fr) * 2020-09-10 2022-03-17 Mapro International Macchine Pneumatiche Rotative S.P.A. Pompe à vide

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4238271A1 (de) * 1992-11-13 1994-05-19 Leybold Ag Zweiwellenvakuumpumpe
DE9311986U1 (de) * 1993-08-11 1993-10-14 Leybold Ag, 63450 Hanau Zweistufige Drehschiebervakuumpumpe
US5795136A (en) * 1995-12-04 1998-08-18 Sundstrand Corporation Encapsulated rotary screw air compressor
JPH1054382A (ja) * 1996-08-14 1998-02-24 Mitsubishi Electric Corp ベーン式真空ポンプ
US6126410A (en) * 1998-02-12 2000-10-03 Gast Manufacturing Corporation Head cover assembly for reciprocating compressor
US6431845B1 (en) 2000-06-09 2002-08-13 Gast Manufacturing, Inc. Head cover assembly with monolithic valve plate
US6499727B1 (en) 2001-06-15 2002-12-31 Jack Bill Sylvester Internal drive aerator for body of liquids
DE10150015A1 (de) 2001-10-11 2003-04-17 Leybold Vakuum Gmbh Mehrkammeranlage zur Behandlung von Gegenständen unter Vakuum, Verfahren zur Evakuierung dieser Anlage und Evakuierungssystem dafür
USD499119S1 (en) 2003-11-05 2004-11-30 Gast Manufacturing Corporation Compressor
DE102004024554B4 (de) * 2004-05-18 2018-01-25 Pfeiffer Vacuum Gmbh Ölgedichtete Drehschiebervakuumpumpe
DE102004055459A1 (de) * 2004-11-17 2006-05-18 Bernt Renner Drehkolbenverdichter
CN101552507B (zh) * 2009-05-14 2011-05-04 北京化工大学 一种电机轴颈剖分式旋转密封装置
JP2013024124A (ja) * 2011-07-21 2013-02-04 Hitachi Automotive Systems Ltd 内燃機関の動弁装置
JP6465626B2 (ja) * 2014-03-05 2019-02-06 カルソニックカンセイ株式会社 気体圧縮機
US10760737B2 (en) * 2016-08-10 2020-09-01 Irwin Industrial Tool Company Pump with angled drain system
CN106762668B (zh) * 2017-03-07 2018-06-22 北京艾岗科技有限公司 一种立式真空泵自循环润滑冷却系统
US20230313803A1 (en) * 2022-04-05 2023-10-05 Milwaukee Electric Tool Corporation Vacuum pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660287A (en) * 1924-12-18 1928-02-21 A D Cook Inc Gear pump
DE2354039A1 (de) * 1973-10-29 1975-05-07 Leybold Heraeus Gmbh & Co Kg Drehschieberpumpe
FR2321612A1 (fr) * 1975-08-16 1977-03-18 Bosch Gmbh Robert Pompe hydrostatique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO140903C (no) * 1976-10-21 1979-12-05 Thune Eureka As Anordning ved neddykkbar, hydraulisk drevet og med vertikal akse roterende pumpe
US4311440A (en) * 1977-01-05 1982-01-19 Hale Fire Pump Company Pump
US4737087A (en) * 1984-12-10 1988-04-12 Barmag Ag Drive shaft seal for gear pump and method
US4669738A (en) * 1985-04-25 1987-06-02 John Crane-Houdaille, Inc. Internally installable package seal
FR2586763B1 (fr) * 1985-08-27 1989-07-28 Cit Alcatel Ensemble moto-pompe a palettes sans fuites exterieures d'huile
JPH0726624B2 (ja) * 1989-08-10 1995-03-29 三菱電機株式会社 油回転真空ポンプの軸封装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660287A (en) * 1924-12-18 1928-02-21 A D Cook Inc Gear pump
DE2354039A1 (de) * 1973-10-29 1975-05-07 Leybold Heraeus Gmbh & Co Kg Drehschieberpumpe
FR2321612A1 (fr) * 1975-08-16 1977-03-18 Bosch Gmbh Robert Pompe hydrostatique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004221A1 (fr) * 1993-07-28 1995-02-09 Leybold Aktiengesellschaft Pompe a vide a palette a deux etages
US5879138A (en) * 1993-07-28 1999-03-09 Balzers Und Leybold Deutschland Holding Ag Two-stage rotary vane vacuum pump
IT201600132325A1 (it) * 2016-12-29 2018-06-29 Vhit S P A Soc Unipersonale Gruppo per vuoto
IT201600132428A1 (it) * 2016-12-29 2018-06-29 Vhit S P A Soc Unipersonale Gruppo per vuoto
WO2022053959A1 (fr) * 2020-09-10 2022-03-17 Mapro International Macchine Pneumatiche Rotative S.P.A. Pompe à vide

Also Published As

Publication number Publication date
EP0459112B1 (fr) 1994-05-18
DE9007544U1 (de) 1992-08-13
JPH04231697A (ja) 1992-08-20
DE59101642D1 (de) 1994-06-23
US5156532A (en) 1992-10-20
DE4017194A1 (de) 1991-12-05

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