EP0135480A1 - Roots-Kompressor mit positiver Verdrängung - Google Patents

Roots-Kompressor mit positiver Verdrängung Download PDF

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Publication number
EP0135480A1
EP0135480A1 EP84830021A EP84830021A EP0135480A1 EP 0135480 A1 EP0135480 A1 EP 0135480A1 EP 84830021 A EP84830021 A EP 84830021A EP 84830021 A EP84830021 A EP 84830021A EP 0135480 A1 EP0135480 A1 EP 0135480A1
Authority
EP
European Patent Office
Prior art keywords
compressor
shaft
rotation
rotor
clamping
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Withdrawn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
EP84830021A
Other languages
English (en)
French (fr)
Inventor
Pier Paolo Messori
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto 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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP0135480A1 publication Critical patent/EP0135480A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a Hoots-type rotary positive-displacement compressor comprising twc contra-rotating rotors with shafts which carry at one end two gear wheels meshed with each other for transmitting rotation from one rotor to the other, in which the shaft of one of the rotors carries a drive member for coupling with drive means for the compressor.
  • this invention constitutes an improvement over Italian Patent Application No. 67502-A/82 filed by the same Applicants on 15th April 1982 and laid open for public inspection on 12th October 1983, in which the gear wheels are rendered rigid for rotation with the respective shafts by means of simple axial friction -clamping means.
  • the axial clamping means comprise locking nuts screwed onto corresponding screw-threaded parts of the respective shafts and bearing frontally against the gear wheels.
  • the object of the present invention is to avoid this disadvantage and to provide a compressor of the aforesaid type which is able to ensure the correct phasing of the two rotors and their gear wheels in a reliable and durable manner.
  • the present invention provides a rotary positive-displacement compressor of the type defined initially, characterised in that the rotor with which the drive member is associated and its shaft are formed with a central axial through-hole in which is inserted a tie rod with screw-threaded ends onto which respective clamping nuts are screwed to clamp the respective gear wheel fcr rotation with the shaft of the rotor.
  • tie rod allows the achievement of a higher axial clamping load on the gear wheel, which is due also to the axial resilient action of the tie rod under traction which allows more secure locking of this gear wheel to be ensured in practice, and hence ensures that the correct phasing of the compressor is maintained with time.
  • the drive member for the compressor is rendered rigid for rotation with the shaft of the rotor by means of the tie rod.
  • Roots-type rotary positive-displacement compressor for supercharging an internal combustion engine for motor vehicles is generally indicated 10.
  • the compressor 10 includes a casing 11 having external fins, not shown, in which there are rotatably mounted two double-lobed rotors 12, 14 of known type, the respective shafts 16,18 of which are supported for rotation by a pair of end walls 20, 22 applied and sealed to the opposite ends of the casing 11. Two removable covers, 26 and 28 respectively, are fitted to the two support walls 20, 22.
  • Twc gear wheels 38, 40 having the same diameters are mounted on the ends of the shafts 16, 1E nearer the end wall 20 and are meshed with each other. Furthermore, this end of the shaft 16 passes through and is sealed in the cover 26, and carries a toothed pulley 42 for connection by means of a toothed belt to a drive member constituted, for example, by the shaft of the engine with which the compressor 10 is associated or the timing shaft of this engine.
  • the coupling of the gear 38 for rotation with the shaft 16, however, 15 achieved, according tc the invention, by means of a tie rod 48 which passes through a central axial through-hole 50 formed in the rotor 12 and its shaft 16.
  • the tie rod 48 has screw-threaded ends 48a, 48b onte which are screwed respective clamping nut.s 52, 54.
  • the nut 54 that is, the one located nearer the end wall 22, is fully tightened against the corresponding end of the shaft 16 with the interposition of a washer 56.
  • the other nut 52 that is, the one located nearer the end wall 20, is fully tightened against the other end of the shaft 1, and against the hub 42a of the toothed pulley 42. with the interposition of a washer 58.
  • the hub 42a passes through the cover 26 and its inner end bears frontally against the gear wheel 38 tc clamp it axially against the inner ring of the bearing 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP84830021A 1983-02-09 1984-01-27 Roots-Kompressor mit positiver Verdrängung Withdrawn EP0135480A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67143/83A IT1165533B (it) 1983-02-09 1983-02-09 Compressore volumetrico rotativo del tipo roots
IT6714383 1983-02-09

Publications (1)

Publication Number Publication Date
EP0135480A1 true EP0135480A1 (de) 1985-03-27

Family

ID=11299944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830021A Withdrawn EP0135480A1 (de) 1983-02-09 1984-01-27 Roots-Kompressor mit positiver Verdrängung

Country Status (3)

Country Link
EP (1) EP0135480A1 (de)
ES (1) ES277425Y (de)
IT (1) IT1165533B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024076660A (ja) * 2022-11-25 2024-06-06 株式会社吉野工業所 容器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR776196A (fr) * 1933-08-25 1935-01-18 Perfectionnements aux compresseurs rotatifs d'air ou de gaz, pompes à vide ou à liquide, ou machines analogues
FR778367A (fr) * 1933-05-08 1935-03-15 Compresseur bi-rotor polypale à vitesse variable et mouvement reversible, sans graissage du cylindre
FR1039761A (fr) * 1951-07-11 1953-10-09 Bronzavia Sa Perfectionnements aux pompes rotatives à gaz
FR1152879A (fr) * 1955-11-30 1958-02-26 Pompe à engrenages perfectionnée
FR2029362A1 (de) * 1969-01-23 1970-10-23 Constantin Alexis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR778367A (fr) * 1933-05-08 1935-03-15 Compresseur bi-rotor polypale à vitesse variable et mouvement reversible, sans graissage du cylindre
FR776196A (fr) * 1933-08-25 1935-01-18 Perfectionnements aux compresseurs rotatifs d'air ou de gaz, pompes à vide ou à liquide, ou machines analogues
FR1039761A (fr) * 1951-07-11 1953-10-09 Bronzavia Sa Perfectionnements aux pompes rotatives à gaz
FR1152879A (fr) * 1955-11-30 1958-02-26 Pompe à engrenages perfectionnée
FR2029362A1 (de) * 1969-01-23 1970-10-23 Constantin Alexis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024076660A (ja) * 2022-11-25 2024-06-06 株式会社吉野工業所 容器

Also Published As

Publication number Publication date
IT8367143A0 (it) 1983-02-09
IT1165533B (it) 1987-04-22
ES277425Y (es) 1985-02-01
ES277425U (es) 1984-07-01

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19851128

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MESSORI, PIER PAOLO