EP0019605B1 - A rotary vane machine - Google Patents

A rotary vane machine Download PDF

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Publication number
EP0019605B1
EP0019605B1 EP80850073A EP80850073A EP0019605B1 EP 0019605 B1 EP0019605 B1 EP 0019605B1 EP 80850073 A EP80850073 A EP 80850073A EP 80850073 A EP80850073 A EP 80850073A EP 0019605 B1 EP0019605 B1 EP 0019605B1
Authority
EP
European Patent Office
Prior art keywords
lead
cylinder
glass
rotor
wear resistant
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.)
Expired
Application number
EP80850073A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0019605A1 (en
Inventor
George Anthony Cooper
Jacques Berlie
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.)
Institut Cerac SA
Original Assignee
Institut Cerac 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 Institut Cerac SA filed Critical Institut Cerac SA
Publication of EP0019605A1 publication Critical patent/EP0019605A1/en
Application granted granted Critical
Publication of EP0019605B1 publication Critical patent/EP0019605B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced

Definitions

  • the present invention relates to a rotary vane machine according to the prior art part of claim 1; it is intended for operation with a dry and oil-free compressible working medium, e.g. compressed air, at high speeds.
  • a dry and oil-free compressible working medium e.g. compressed air
  • GB-A-1 336 128 describes a material, example 2, comprising PTFE and carbon and glass fibres and furthermore it is compression moulded under the conventional conditions pertaining for PTFE followed by sintering. 1596 by weight of bronze powder. Since bronze is much denser than the other '- materials in the example the figure is much lower when calculated according to volume.
  • GB-A-1 324 248 describes for dry operation a vane material having a matrix of lead oxide and not more than 20% of PTFE and also another one having a matrix of PTFE and a filler of lead oxide; it describes furthermore that bronze may be substituted for lead.
  • the main object of the present invention has been to find a material combination which is sufficiently hard to make it wear resistant without being brittle so that pieces are broken away from the vanes. Since a working medium which is believed to be dry and oil-free often contains small amounts of moisture and oil, the vane machine according to the invention should be capable of operation also under these circumstances wihout any serious effects on the service life.
  • a rotary vane machine in which the substantially radially movable vanes are provided with portions, at least at the surface in sealing contact with the cylinder housing of a wear resistant material according to the prior art part of claim 1 and characterized thereby that the material comprises, between 5 and 3096 by volume of glass or carbon as hard phases and from 10 to 2096 by volume of lead or lead oxide as inorganic solid lubricant whereas the cooperating surface of the cylinder is made of steel or cast iron.
  • Fig. 1 is a longitudinal section through an air motor according to 1-1 in Fig. 2.
  • Fig. 2 is a cross-section through the motor according to 2-2 in Fig. 1.
  • Fig. 3 shows the wear rates obtained in a series of tests with different amounts of lead.
  • Fig. 4 shows the wear rates as a function of the amount of lead.
  • the air motor shown in Figs. 1 and 2 comprises a cylinder housing 11 provided with two end plates 13.
  • a rotor 16 having an outgoing shaft 12 is eccentrically journalled relative to cylinder 11 in the end plates 13 by means of bearings 14.
  • the rotor is further provided with a number of vanes 20 which are movable in substantially radial slots 19. Substantially radial in this context means that the slots may deviate from the radial direction with up to 30°.
  • the housing is provided with an inlet port 30 for compressed air and outlet ports 31.
  • Fig. 3 shows the wear rates obtained with different amounts of semi-oxidised lead metal. These tests have been made with an air motor operating unloaded at 10000 rpm, corresponding to a sliding speed of 20 m/sec. The ratio of glass fibre, cut into short pieces, to polytetrafluoroethylene (PTFE) has been kept constant at one to three. All amounts are given in percent by volume (v/o).
  • Fig. 4 the wear rates in ,um/hr are shown as a function of the amount of lead.
  • the wear rate obtained without lead is the wear rate obtainable with the combination of materials disclosed in the above mentioned U.S. patent 3 335 944.
  • the wear rate obtained with one percent of lead (18 ,um/hr) has been deleted when Fig.
  • Tests have also been made, at the above mentioned operating speeds, with carbon fibre instead of glass as the hard phase material.
  • two varieties commonly known as type I (high modulus, moderate strength). and type II (high strength, moderate modulus) were used.
  • the ratio of carbon fibres to PTFE was kept constant at one to three.
  • Tests were made with up to 20 v/o of lead with the type II fibres.
  • a wear rate of 4 ⁇ m/hr was obtained with 60 v/o PTFE, 20 v/o carbon fibre type II and 20 v/o lead.
  • With a composition comprising 60 v/o PTFE, 20 v/o carbon fibre type I and 20 v/o lead a wear rate of 1.5,um/hr was obtained. It can be seen from these results that very good performance is obtainable with carbon fibres as hard phases.
  • the best value obtained with type I fibres is as good as the value obtained with glass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Lubricants (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Saccharide Compounds (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Sliding-Contact Bearings (AREA)
EP80850073A 1979-05-16 1980-05-12 A rotary vane machine Expired EP0019605B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7904291 1979-05-16
SE7904291A SE427491B (sv) 1979-05-16 1979-05-16 Lamellmaskin

Publications (2)

Publication Number Publication Date
EP0019605A1 EP0019605A1 (en) 1980-11-26
EP0019605B1 true EP0019605B1 (en) 1983-03-02

Family

ID=20338069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80850073A Expired EP0019605B1 (en) 1979-05-16 1980-05-12 A rotary vane machine

Country Status (9)

Country Link
EP (1) EP0019605B1 (sv)
JP (1) JPS55153885A (sv)
AU (1) AU536155B2 (sv)
BR (1) BR8003080A (sv)
DE (1) DE3062178D1 (sv)
ES (1) ES491491A0 (sv)
NO (1) NO801324L (sv)
SE (1) SE427491B (sv)
SU (1) SU1056920A3 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20021980U1 (de) * 2000-12-27 2002-05-08 Cooper Power Tools Gmbh & Co Luftmotor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8718312D0 (en) * 1987-08-03 1987-09-09 Rotocold Ltd Rotor blades
GB2220448B (en) * 1988-07-05 1992-09-30 T & N Technology Ltd Improvements in or relating to rotor blades
US5328337A (en) * 1990-08-17 1994-07-12 Kunta Norbert J Guided vanes hydraulic power system
DE19744812A1 (de) * 1997-10-02 1999-04-08 Herold & Semmler Transporttech Rotationskolbenmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH451716A (de) * 1967-07-19 1968-05-15 Balzers Patent Beteilig Ag Vakuumdrehschieberpumpe
GB1213552A (en) * 1968-06-20 1970-11-25 Black & Decker Mfg Co Improvements in or relating to pneumatic motor vanes
GB1336128A (en) * 1969-11-10 1973-11-07 Tac Construction Materials Ltd Plastics material reinforced with carbon and other fibres
GB1324248A (en) * 1970-11-23 1973-07-25 British Oxygen Co Ltd Rotary pumps
GB1324443A (en) * 1970-11-23 1973-07-25 British Oxygen Co Ltd Rotary pumps
DE2355996A1 (de) * 1973-11-09 1975-05-15 Pfeiffer Vakuumtechnik Schieber fuer drehschieberpumpen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20021980U1 (de) * 2000-12-27 2002-05-08 Cooper Power Tools Gmbh & Co Luftmotor

Also Published As

Publication number Publication date
JPS55153885A (en) 1980-12-01
EP0019605A1 (en) 1980-11-26
SU1056920A3 (ru) 1983-11-23
ES8101727A1 (es) 1980-12-16
NO801324L (no) 1980-11-17
DE3062178D1 (en) 1983-04-07
SE427491B (sv) 1983-04-11
BR8003080A (pt) 1980-12-23
SE7904291L (sv) 1980-11-17
ES491491A0 (es) 1980-12-16
AU536155B2 (en) 1984-04-19

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