EP0368124A1 - Mehrstufige Roots-Pumpe und deren Montageverfahren - Google Patents

Mehrstufige Roots-Pumpe und deren Montageverfahren Download PDF

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Publication number
EP0368124A1
EP0368124A1 EP89120181A EP89120181A EP0368124A1 EP 0368124 A1 EP0368124 A1 EP 0368124A1 EP 89120181 A EP89120181 A EP 89120181A EP 89120181 A EP89120181 A EP 89120181A EP 0368124 A1 EP0368124 A1 EP 0368124A1
Authority
EP
European Patent Office
Prior art keywords
lobe
stator
flange
screws
lobes
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
EP89120181A
Other languages
English (en)
French (fr)
Other versions
EP0368124B1 (de
Inventor
Dominique Guittet
Eric Taberlet
Jean-François Vuillermoz
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT 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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to AT89120181T priority Critical patent/ATE86010T1/de
Publication of EP0368124A1 publication Critical patent/EP0368124A1/de
Application granted granted Critical
Publication of EP0368124B1 publication Critical patent/EP0368124B1/de
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
    • 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
    • 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
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type
    • 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
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming
    • Y10T403/7052—Engaged by axial movement
    • Y10T403/7056—Threaded actuator
    • 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
    • Y10T403/7062—Clamped members
    • Y10T403/7064—Clamped members by wedge or cam
    • Y10T403/7066—Clamped members by wedge or cam having actuator
    • Y10T403/7067—Threaded actuator
    • Y10T403/7069—Axially oriented

Definitions

  • the present invention relates to a multi-stage roots pump comprising a stator and a rotor assembly, the stator defining a plurality of successive compression chambers, each compression chamber being limited axially by two flanges and radially by a stator ring, the rotor assembly being located inside the stator and consisting of two parallel shafts, each shaft comprising in each compression chamber a compression lobe which is attached and fixed, when the pump is mounted on its shaft, the shafts being supported by bearings in flanges located at the ends of the stator and comprising a synchronization gear located in a casing fixed to one of the end flanges, one of the shafts being driven in rotation by a drive motor.
  • French documents 2,517,755 (USA 4,504,201) and 660,528 disclose a multistage pump of this type.
  • each stage of the stator is constituted by a kind of box without cover, which is closed during assembly by juxtaposition with the next stage, thus each stator stage forms a chamber axially limited by an integral flange of the floor considered and by a flange belonging to the previous floor.
  • the rotors are mounted on the shafts in an unspecified manner but appear, in consideration of FIG. 1, keyed on the shafts.
  • stator is shown in FIG. 3 and appears to be in one piece, while for the rotors, the rotary pistons are mounted keyed on the shafts.
  • the object of the invention is to produce a modular multi-stage roots pump, with simple manufacturing parts allowing precise machining, and allowing very precise mounting, in particular of the position of the rotary lobes on the shafts so as to achieve a machine with very small lateral clearances between the lobes and the flanges, of the order of mm and therefore reach deeper voids than in current machines, of the order of a decade.
  • the subject of the invention is therefore a multi-stage roots pump such as as defined above, characterized in that said flanges and stator rings are separate pieces stacked alternately and in that each compression lobe is composed of a body and a flange, the flange being fixed to the body by screws arranged axially, and compressing a set of two conical rings, one of which penetrates inside the other by undergoing a radial narrowing ensuring the fixing of the lobe on its shaft.
  • the flange of a compression lobe comprises four clamping screws for its fixing against its body, thus, during operation d), the flange of each lobe is only fixed to its respective body by two of these four screws and without tightening, then, during operation g), two so-called mounting screws are used provided with washers pressing against the mounting plate, these two mounting screws being screwed into the two tapped holes in each lobe body, not occupied by clamping screws, then under operation h), tighten the two clamping screws and then carry out operation i), we then place in place of the two mounting screws removed, the two remaining tightening screws to which the tightening torque is applied, then continue operations j) to l) indicated above.
  • the roots pump of the invention comprises a stator and a rotor assembly.
  • the stator defines a plurality of compression chambers such as the chamber 20.
  • Each chamber 20 is bounded radially by a stator ring 21 and axially by two lateral flanges, separating the chambers from one another.
  • FIG. 3 only the first lateral flange 22 is seen, which is the lower end flange.
  • a second flange 22 which comes to rest on the upper end of the stator ring 21.
  • This second flange has its internal surface at the same level as its support against the stator ring 21, in the same way as the first end flange 22 shown.
  • the part which rests on the upper end of the stator ring 21 is not a lateral flange 22, but a simple mounting plate 23, the role of which will be explained below.
  • the stator is thus constituted by an alternative series of flanges 22 and stator rings 21 up to the upper end flange.
  • the rotor assembly located inside the stator comprises two parallel shafts 24 and 25 mounted on ball bearings 26, 27 carried by the flanges 22 located at the ends of the machine.
  • the shafts 24 and 25 are each equipped, in each chamber 20, with a compression lobe 28.
  • the compression lobes 28 being attached to the shafts during assembly, the separation flanges are each in a single part.
  • Figure 1 shows in exploded view a compression lobe 28. It comprises a lobe body 29 and a flange 30.
  • the flange 30 is used to compress, by means of a washer 31 a set of two conical rings 32 and 33 , so as to fix the lobe on its tree. Tightening is carried out by means of four clamping screws 34 which pass through smooth holes in the flange 30 and are screwed into tapped holes 35 in the body 29.
  • the ring 33 enters the ring 32, and when the screws are tightened 34, the ring 33 undergoes a radial narrowing ensuring the fixing of the lobe 28 on its shaft.
  • the washer 31 and the flange 30 can be made in one piece.
  • Each lobe 28 further comprises two smooth, blind, tracing holes 36 used to position the lobes respectively relative to one another during assembly.
  • the shafts comprise a synchronization gear composed of two pinions 37 and 38 mounted respectively on the shafts 24 and 25.
  • This gear is located inside a casing 39 fixed by screws 40 to the flange of end 22.
  • the casing 39 contains lubricating oil.
  • the compression chambers 20 are isolated from this oil by lip seals 41 and 42.
  • the shaft 24 is rotated by a drive motor, not shown. It should be noted that on each shaft, the compression lobes, in the different successive chambers, are offset from one chamber to the next, angularly, by ⁇ 2 .
  • the different flanges 22 and stator rings 21 are positioned between them by centering pins and fixed to each other by screws.
  • This mounting plate 23 has on its internal face and inside the perimeter delimiting the internal wall 47 of the stator ring 21, an additional thickness j penetrating into the stator ring, and which corresponds to the desired axial clearance between the lobes 28 and the flange 22 which will be placed next, and which does not include any additional thickness. Then the lobes 28 are pressed against this mounting plate 23 using for each lobe, two mounting screws 48 which are screwed into the two tapped holes 35 not occupied by clamping screws. These mounting screws 48 are supported by means of support washers 49, against the upper face of the mounting plate 23. By thus screwing these two screws 48, the lobe is pressed against the underside of the mounting plate 23.
  • the pump is arranged horizontally.
  • the pump has a suction port and a discharge port and each chamber has an intermediate discharge communicating with an intermediate suction of the next chamber, this by orifices made in the flanges 22, but this is known and does not do not part of the invention and has not been shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Steroid Compounds (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP89120181A 1988-11-07 1989-10-31 Mehrstufige Roots-Pumpe und deren Montageverfahren Expired - Lifetime EP0368124B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89120181T ATE86010T1 (de) 1988-11-07 1989-10-31 Mehrstufige roots-pumpe und deren montageverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8814493 1988-11-07
FR8814493A FR2638786B1 (fr) 1988-11-07 1988-11-07 Pompe roots multietagee et procede de montage d'une telle pompe

Publications (2)

Publication Number Publication Date
EP0368124A1 true EP0368124A1 (de) 1990-05-16
EP0368124B1 EP0368124B1 (de) 1993-02-24

Family

ID=9371624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120181A Expired - Lifetime EP0368124B1 (de) 1988-11-07 1989-10-31 Mehrstufige Roots-Pumpe und deren Montageverfahren

Country Status (8)

Country Link
US (1) US5013227A (de)
EP (1) EP0368124B1 (de)
JP (1) JPH0631626B2 (de)
AT (1) ATE86010T1 (de)
DE (1) DE68905027T2 (de)
ES (1) ES2039805T3 (de)
FR (1) FR2638786B1 (de)
RU (1) RU1834986C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051316A1 (de) 2010-11-13 2012-05-16 Pfeiffer Vacuum Gmbh Vakuumpumpe

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6095781A (en) * 1997-09-11 2000-08-01 Viking Pump, Inc. Timed element, high pressure, industrial rotary lobe pump
US6123526A (en) * 1998-09-18 2000-09-26 Industrial Technology Research Institute Multistage pump and method for assembling the pump
US6783342B2 (en) * 2001-09-26 2004-08-31 United Dominion Industries, Inc. Method and apparatus for timing rotors in a rotary lobe pump
EP2532895B1 (de) * 2011-06-06 2014-02-26 Vacuubrand Gmbh + Co Kg Vakuumpumpe mit einseitiger Lagerung der Pumpenrotoren

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR660528A (fr) * 1928-09-17 1929-07-12 Cfcmug Compresseur roots multi-cellulaire pour hautes pressions
US4504201A (en) * 1982-11-22 1985-03-12 The Boc Group Plc Mechanical pumps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425816A (en) * 1981-01-05 1984-01-17 Komori Printing Machinery Co., Ltd. Structure for securing a cylinder drive gear to the end of a cylinder shaft in a printing machine
JPH0733834B2 (ja) * 1986-12-18 1995-04-12 株式会社宇野澤組鐵工所 ロータ内蔵ハウジングの外周温度が安定化された内部分流逆流冷却多段式の三葉式真空ポンプ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR660528A (fr) * 1928-09-17 1929-07-12 Cfcmug Compresseur roots multi-cellulaire pour hautes pressions
US4504201A (en) * 1982-11-22 1985-03-12 The Boc Group Plc Mechanical pumps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051316A1 (de) 2010-11-13 2012-05-16 Pfeiffer Vacuum Gmbh Vakuumpumpe
EP2461040A1 (de) 2010-11-13 2012-06-06 Pfeiffer Vacuum GmbH Vakuumpumpe und Verbindung von Welle und Drehkolben

Also Published As

Publication number Publication date
EP0368124B1 (de) 1993-02-24
RU1834986C (ru) 1993-08-15
JPH02157489A (ja) 1990-06-18
FR2638786A1 (fr) 1990-05-11
DE68905027D1 (de) 1993-04-01
FR2638786B1 (fr) 1990-12-07
JPH0631626B2 (ja) 1994-04-27
DE68905027T2 (de) 1993-06-17
US5013227A (en) 1991-05-07
ATE86010T1 (de) 1993-03-15
ES2039805T3 (es) 1993-10-01

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