EP1207307A1 - Screw compressor - Google Patents

Screw compressor Download PDF

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Publication number
EP1207307A1
EP1207307A1 EP01127272A EP01127272A EP1207307A1 EP 1207307 A1 EP1207307 A1 EP 1207307A1 EP 01127272 A EP01127272 A EP 01127272A EP 01127272 A EP01127272 A EP 01127272A EP 1207307 A1 EP1207307 A1 EP 1207307A1
Authority
EP
European Patent Office
Prior art keywords
output shaft
compressor
electric motor
rotor
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.)
Withdrawn
Application number
EP01127272A
Other languages
German (de)
English (en)
French (fr)
Inventor
Pasquale Patrizio Pellicano
Mirko Finocchi
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.)
FINI ELETTROCOSTRUZIONI MECCANICHE SpA
Original Assignee
FINI ELETTROCOSTRUZIONI MECCANICHE SpA
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 FINI ELETTROCOSTRUZIONI MECCANICHE SpA filed Critical FINI ELETTROCOSTRUZIONI MECCANICHE SpA
Publication of EP1207307A1 publication Critical patent/EP1207307A1/en
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a screw compressor.
  • the present invention relates to a screw compressor of the type comprising an electric motor with a first output shaft; two intermeshing rotors, one of which has a second output shaft substantially coaxial with and facing the first shaft; and connecting means for connecting the first and second shaft in angularly fixed manner.
  • said connecting means comprise an elastic joint, in turn comprising two half-joints interference-fitted respectively to the first and second shaft; and a rubber ring interposed between the two half-joints.
  • the compressor also comprises two bearings between the rotors and the electric motor, for respectively supporting the first and second shaft in rotary manner. More specifically, the bearing supporting the first shaft is housed inside a tubular housing interposed between a first tubular casing housing the two rotors, and a second tubular casing housing the electric motor.
  • the two half-joints must be expanded thermally to engage the first and second shaft in axially sliding manner, so that fitting and removing the half-joints to and from the shafts are relatively painstaking jobs.
  • a screw compressor comprising an electric motor having a given longitudinal axis; and two intermeshing rotors, a first of said rotors being substantially coaxial with said longitudinal axis; characterized by also comprising a single output shaft defining the output shaft of both said electric motor and said first rotor.
  • Number 1 in the accompanying drawing indicates as a whole a screw compressor comprising an electric motor 2 having a tubular outer casing 3, which has a substantially horizontal longitudinal axis 4 and houses a rotor 5 fitted to an output shaft 6 substantially coaxial with axis 4.
  • shaft 6 is mounted to rotate about axis 4 with respect to casing 3 and via the interposition of rolling bearings 7.
  • Compressor 1 also comprises a tubular outer casing 8 connected directly to casing 3 and housing two rotors 9, 10, which are rotated by motor 2 with respect to casing 8, one about axis 4, and the other about an axis 11 substantially parallel to axis 4.
  • Each rotor 9, 10 comprises a central portion 12, 13, which is coaxial with respective axis 4, 11, has a symmetrically helical outer contour, and meshes with portion 13, 12 of the other rotor 10, 9 to compress a fluid inside casing 8 as the two rotors 9, 10 are counter-rotated by motor 2.
  • portion 12 is fitted through with shaft 6, and is connected in angularly fixed manner to shaft 6, which therefore comprises a central portion 14 located between rotors 5 and 9 and supported in rotary manner by a single- rolling bearing 7, and a lateral portion 15 located at the opposite end of portion 12 to portion 14.
  • portion 12 of rotor 9 is formed in one piece with shaft 6, and rotor 5 of electric motor 2 is fitted to shaft 6.
  • Rotor 10 comprises two shanks 16, which are preferably, though not necessarily, formed in one piece with portion 13, are located at opposite ends of portion 13, and are coaxial with axis 11.
  • shanks 16 define the end portions of a relative output shaft to which portion 13 is fitted.
  • shaft 6 may define the output shaft of motor 2 and of rotor 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
EP01127272A 2000-11-17 2001-11-16 Screw compressor Withdrawn EP1207307A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000BO000669A ITBO20000669A1 (it) 2000-11-17 2000-11-17 Compressore a vite
ITBO000669 2000-11-17

Publications (1)

Publication Number Publication Date
EP1207307A1 true EP1207307A1 (en) 2002-05-22

Family

ID=11438859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127272A Withdrawn EP1207307A1 (en) 2000-11-17 2001-11-16 Screw compressor

Country Status (3)

Country Link
US (1) US20020081227A1 (it)
EP (1) EP1207307A1 (it)
IT (1) ITBO20000669A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7573165B2 (en) 2000-12-21 2009-08-11 Ingersoll-Rand European Sales Limited Compressor and driving motor assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121479A (ja) * 2006-11-10 2008-05-29 Hitachi Appliances Inc 密閉形スクリュー圧縮機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796526A (en) * 1972-02-22 1974-03-12 Lennox Ind Inc Screw compressor
US4311440A (en) * 1977-01-05 1982-01-19 Hale Fire Pump Company Pump
US5222874A (en) * 1991-01-09 1993-06-29 Sullair Corporation Lubricant cooled electric drive motor for a compressor
DE19745616A1 (de) * 1997-10-10 1999-04-15 Leybold Vakuum Gmbh Gekühlte Schraubenvakuumpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796526A (en) * 1972-02-22 1974-03-12 Lennox Ind Inc Screw compressor
US4311440A (en) * 1977-01-05 1982-01-19 Hale Fire Pump Company Pump
US5222874A (en) * 1991-01-09 1993-06-29 Sullair Corporation Lubricant cooled electric drive motor for a compressor
DE19745616A1 (de) * 1997-10-10 1999-04-15 Leybold Vakuum Gmbh Gekühlte Schraubenvakuumpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7573165B2 (en) 2000-12-21 2009-08-11 Ingersoll-Rand European Sales Limited Compressor and driving motor assembly

Also Published As

Publication number Publication date
ITBO20000669A1 (it) 2002-05-17
US20020081227A1 (en) 2002-06-27
ITBO20000669A0 (it) 2000-11-17

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