EP0210145A2 - Periodisch arbeitende pneumatische Flügelzellenpumpe - Google Patents

Periodisch arbeitende pneumatische Flügelzellenpumpe Download PDF

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Publication number
EP0210145A2
EP0210145A2 EP86830213A EP86830213A EP0210145A2 EP 0210145 A2 EP0210145 A2 EP 0210145A2 EP 86830213 A EP86830213 A EP 86830213A EP 86830213 A EP86830213 A EP 86830213A EP 0210145 A2 EP0210145 A2 EP 0210145A2
Authority
EP
European Patent Office
Prior art keywords
pump
container
oil
air
pneumatic vane
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
EP86830213A
Other languages
English (en)
French (fr)
Other versions
EP0210145A3 (en
EP0210145B1 (de
Inventor
Ettore C/O Corint S.R.L Cordiano
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.)
Corint SRL
Original Assignee
Corint SRL
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11304587&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0210145(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Corint SRL filed Critical Corint SRL
Publication of EP0210145A2 publication Critical patent/EP0210145A2/de
Publication of EP0210145A3 publication Critical patent/EP0210145A3/en
Application granted granted Critical
Publication of EP0210145B1 publication Critical patent/EP0210145B1/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
    • 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
    • F04C29/026—Lubricant separation
    • 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 an entermittently working pneumatic vane pump of the kind comprising: a rotor provided with slots in which the vanes are lodged, a cylindrical seat in which said rotor rotates.
  • Object of the present invention is to eliminate these drawbacks by realizing a pump which does not require any connection with the engine for the oil feeding and return, which absorbs a lower power than the pumps with pressurized oil and does not require expensive machinery for its production.
  • the lubrication provided by the oil initially contained in the pump is sufficient to ensure opertaion with a small friction and a good sealing between vanes and surfaces in contact.
  • the pump operates dry and thus absorbes a much lower power than if it were continually fed with oil.
  • the various pump components - i.e. cylindrical seat, container for the oil collection, rotor and electrical engine mounting - can be made in sintered metal, so as to avoid all precise machining operations which require expensive machineries and long working times. All this allows to reduce the costs of the system and also, last but not least, the energy absorbed from the vehicle battery.
  • 1 indicates the electrical engine driving the pump, 2 the mounting of said engine, closing at the top the cylindrical seat built in the body 4; 5 is the rotor of the pump in which the vanes 6 are lodged.
  • Air is aspirated from duct 7 and expelled through outlet duct 8.
  • the pressure difference between in and outlet air depends, as known, on the pump sizes, number of vanes, and position of inlet and outlet ports. It is also known that such a pump can be used either to compress or to depress air or any other gas.
  • the container/separator 9 is inserted, consisting of cylindrical container 10 and cover 15.
  • Cover 15 is provided with an inlet duct 11 and a vertical duct 12, wherein said duct 11 comes out.
  • the vertical duct 12 comes up to cover 15 and provided at the top with the slot 13 wherefrom air comes out, arriving from the pump, approximately tangentially to the container wall.
  • the same duct 12 is provided at the bottom with a small bore 14, wherefrom the oil collected in the container during the pump operation returns into the pump when this latter stops.
  • the outlet duct 16 is disposed on the axis of the container and protrudes into its insdie in such a way that the inlet air is compelled to move centerwards for entering into duct 16.
  • duct 16 must be not long enough to arrive under the level of the oil collected at the bottom of the container when the pump is operating.
  • the operation of the system is the following.
  • a certain quantity of oil is collected inside the pump and, in some case, also in the container 10.
  • Fig. 1 the oil level in the pump is indicated with line AA.
  • bore 14 have a small diameter and a length of, at least, 2-3 millimiter, as indicated in Fig. 1.
  • the container/separator 9 can, obviously, have different shapes, all the same operating in the same way.
  • the same vertical section can be used as oil container/separator. In this case separation occurs only by gravity, when air slows down in the large vertical section.
  • FIGS 3, 4 show a possible embodiment of a pump/separator system which can be particularly advantageous from the standpoint of production costs.
  • the cylindrical seat of pump 3 is constituted by a sintered ring 17, in a single piece with ring 18 of the contai­ner/separator.
  • the upper plate 2, supporting the electric motor, and the lower plate 19 complete the assembly.
  • the cylindrical seat of the pump and the contai­ner/separator are connected to each other through passage 20 formed in ring 17, the vertical channel 21 and passage 22 which opens into the container/separator in a substantially tangential direction.
  • the oil returns from the separator into the pump through the little groove 23 formed in the bottom of ring 18.
  • the pump In case the pump is used to create vacuum, a further power reduction can be obtained in the following way. Under these conditions the pump aspirates air from the users circuit until the absolute pressure p o in the latter reaches values of 0.2 ⁇ 0.4 bar. Obviously, the pump is designed in such a way that it can aspirate air at pressure p o , compress it up to atmospheric pressure and discharge it into atmosphere.
  • the problem can be solved by adding a second outlet port, provided with a non-return valve - as shown in Fig. 5, 6 - which is opened before the normal outlet and prevents air from reaching too high pressures.
  • FIGs. 5, 6 show the same pump of Figs. 3, 4 with this variation.
  • Flange 2 supporting the electrical engine, is provided with the outlet bore 24 that, through duct 27, discharges air into vertical duct 21.
  • the device operates as follows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP86830213A 1985-07-26 1986-07-17 Periodisch arbeitende pneumatische Flügelzellenpumpe Expired - Lifetime EP0210145B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6769785 1985-07-26
IT67697/85A IT1182547B (it) 1985-07-26 1985-07-26 Pompa pneumatica a palette a funzionamento e con lubrificazione intermittente

Publications (3)

Publication Number Publication Date
EP0210145A2 true EP0210145A2 (de) 1987-01-28
EP0210145A3 EP0210145A3 (en) 1989-01-04
EP0210145B1 EP0210145B1 (de) 1992-01-02

Family

ID=11304587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86830213A Expired - Lifetime EP0210145B1 (de) 1985-07-26 1986-07-17 Periodisch arbeitende pneumatische Flügelzellenpumpe

Country Status (3)

Country Link
EP (1) EP0210145B1 (de)
DE (1) DE3683206D1 (de)
IT (1) IT1182547B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015068249A (ja) * 2013-09-30 2015-04-13 株式会社クボタ ディーゼルエンジン
US9103246B2 (en) 2010-11-02 2015-08-11 Ford Global Technologies, Llc System and method for reducing vacuum degradation in a vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1854318A (en) * 1926-06-17 1932-04-19 Westinghouse Electric & Mfg Co Compressor
US3040973A (en) * 1958-12-02 1962-06-26 Prec Scient Company Vacuum pump
DE1403568B2 (de) * 1961-06-09 1974-08-15 Leybold-Heraeus Gmbh & Co Kg, 5000 Koeln Ölabscheider an einer Rotations-Vakuumpumpe
DE3322069A1 (de) * 1983-06-18 1984-12-20 Armatec FTS-Armaturen GmbH & Co KG, 7988 Wangen Druckgasmaschine, insbesondere kompressor, mit umlaufschmierung
DE3322869A1 (de) * 1983-06-24 1985-01-03 Gebr. Philipp GmbH, 8750 Aschaffenburg Huelsenanker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9103246B2 (en) 2010-11-02 2015-08-11 Ford Global Technologies, Llc System and method for reducing vacuum degradation in a vehicle
JP2015068249A (ja) * 2013-09-30 2015-04-13 株式会社クボタ ディーゼルエンジン

Also Published As

Publication number Publication date
IT1182547B (it) 1987-10-05
DE3683206D1 (de) 1992-02-13
EP0210145A3 (en) 1989-01-04
EP0210145B1 (de) 1992-01-02
IT8567697A0 (it) 1985-07-26

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