EP0799996A2 - Epitrochoidische Pumpe - Google Patents

Epitrochoidische Pumpe Download PDF

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Publication number
EP0799996A2
EP0799996A2 EP97830155A EP97830155A EP0799996A2 EP 0799996 A2 EP0799996 A2 EP 0799996A2 EP 97830155 A EP97830155 A EP 97830155A EP 97830155 A EP97830155 A EP 97830155A EP 0799996 A2 EP0799996 A2 EP 0799996A2
Authority
EP
European Patent Office
Prior art keywords
rotor
chamber
pump according
pump
delivery
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Withdrawn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
EP97830155A
Other languages
English (en)
French (fr)
Other versions
EP0799996A3 (de
Inventor
Vittorio Bertoli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0799996A2 publication Critical patent/EP0799996A2/de
Publication of EP0799996A3 publication Critical patent/EP0799996A3/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Withdrawn legal-status Critical Current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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/22—Rotary-piston machines or pumps of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member

Definitions

  • the present invention relates to an epitrochoidal pump.
  • gear pumps consisting of a casing having formed inside it two cylindrical chambers communicating with one other and housing two toothed wheels or gears meshing with one another.
  • One toothed wheel is keyed onto a driving shaft which emerges from the casing of the pump so as to be motor-driven, while the other one is keyed onto a driven shaft again supported by the casing.
  • One of the cylindrical chambers is connected to the duct for suction of oil from a tank, while the other chamber communicates with a pressure delivery duct
  • the two toothed wheels form the gearing which traps the oil and forces it into the delivery duct in accordance with a principle already known. Said pumps, however, are somewhat noisy, have pause times and do not allow perfect continuity of flow.
  • EP 0,692,633 discloses a gear pump having formed inside it two parallel cylindrical seats communicating along a common generatrix and having inserted in them two toothed wheels meshing with one another and mounted on rotational shafts supported by bushes in seats formed in the pump body.
  • Said pump comprises means housed in the pump body and designed to exert on each shaft of each toothed wheel a thrusting force with a direction and intensity such that, when combined with the resultant of the forces due to the pressure and meshing, it eliminates the play between the teeth of the toothed wheels.
  • volumetric rotating internal-combustion engines such as the Wankel engine, provided with a rotor having a trilobate shape and performing a roto-translatory movement inside a cylindrical chamber with a trochoidal profile formed in the stator.
  • the rotor divides this chamber into three separate spaces, the volume of which, owing to the movement of the rotor, varies cyclically from a maximum to a minimum
  • the stator has formed in it on one side the inlet and discharge openings which are opened and dosed by the rotor in a manner similar to that of a two-stroke engine and, on the other side, the sparking plug.
  • This engine although having an optimum volumetric efficiency, is penalized by the operating conditions of the sparking plug (compared to alternating engines) on account of the sparking frequency and temperature. It also has a fairly low mechanical efficiency, has difficulty in disposing of the heat absorbed by the rotor and has drawbacks as regards the resistance of the frontal and peripheral seals to the hot gases and to wear due to the sliding friction.
  • the object of the present invention is to eliminate the aforementioned drawbacks and provide a volumetric pump, particularly suited for dense products, which allows a continuous flow to be obtained and which is self-priming.
  • a further object is to provide a pump which has small dimensions, but a high throughput with a low number of revolutions, and which does not subject the treated fluid to stressing effects.
  • the epitrochoidal pump which is characterized by the contents of the claims indicated below and in particular by the fact that it comprises at least one rotor which performs a roto-translatory movement inside a chamber with a trochoidal profile and is driven by a epitrochoidal (or epicyclic) gearing; separator elements applied to the rotor and to the walls of the chamber in order to define inside said chamber at least three areas which are separate from one another and the positioning and volume of which vary cyclically owing to the movement of the rotor; two inlets for suction ducts and two outlets for delivery ducts arranged in the chamber so that, whatever position the rotor, a suction duct and a delivery duct are always active.
  • the inventive idea of the present invention is that of having devised a volumetric pump by means of transformation of the Wankel engine.
  • 1 denotes the body of a pump, consisting of a casing 2 which is enclosed by two flanges 3 and 4 and defines inside it a cylindrical chamber 5 with a trochoidal profile inside which a rotor 6 rotates.
  • the rotor 6, which has a substantially triangular trilobate shape, has inside it a toothing 7 with which a toothed wheel 8 fixed to the flange 3 meshes.
  • the toothed wheel 8 is therefore stationary and does not rotate, while the rotor 6 (which has the toothing 7) is made to rotate by means of a drive shaft 9 of the pump which terminates in a rotational axis 19 (kinematically connected to the rotor 6) which is eccentric with respect to the main axis 18 of the drive shaft 9 and the toothed wheel 8.
  • the toothing 7 and the toothed wheel 8 form an epicyclic gearing in which the toothing 7 rotates integrally with the rotor 6 about the stationary toothed wheel 8.
  • 10 and 11 denote two suction ducts which lead into the chamber 5 and merge, outside the pump, into a common suction pipe 12.
  • 13 and 14 denote two delivery ducts which lead into the chamber 5 and merge, outside the pump, into a common delivery pipe 15.
  • Separator elements 16 are provided at the vertices (or rather at the corners) of the rotor 6 so as to ensure that the rotor itself, during its epitrochoidal rototranslatory movement, divides up the chamber 5 into three separate areas, the positioning and the volume of which vary cylically and continuously owing to the movement of the rotor.
  • Each separator element 16 is provided, with same function, inside the chamber 5 in a middle position and facing each other.
  • Each separator element consists of a body 16a made of elastically deformable material and a flange or strip 16 made of wear- and friction-resistant material and suitable for alimentary purposes. In the case in question, teflon strips have been used.
  • the delivery occurs through the duct 14 (as in the case illustrated in the figures), while the ducts 11 and 13 remain inactive owing to the facing separator elements 16 provided in the middle zone of the chamber 5.
  • Rotation of the rotor in the direction indicated by the arrow 17 subsequently produces activation of the suction duct 11 and the delivery duct 13, while the ducts 10 and 14 became inactive.
  • a comparison of the present pump with gear pumps or lobe pumps reveals the advantage of being able to have a kind of continuous piston (the trilobate rotor) which allows a flow of the continuous type both during suction and during delivery, while conventional pumps are subject to pulsation (owing to the dead time or pauses caused by the gearing or the lobes) and there is a reduced suction capacity.
  • the present pump is moreover of the dry self-priming type, which does not need to be filled with fluid and which therefore does not require a complementary system for priming.
  • sealing members or the separator elements, which are formed with a resilient body and a teflon flange and which follow the movements of the rotor inside the chamber, causing the flanges to adhere to the walls of the chamber itself.
  • the present pump allows high throughputs with a low number of rotations and small dimensions.
  • a further advantage of the present pump is provided by the reversibility, since it is sufficient to change the direction of rotation of the rotor in order to interchange the delivery and suction.
  • Another advantage of the present pump consists in the fact that it has a single pumping element (the rotor) which exerts a gentle action on the fluid or on the treated product, this being particularly useful when using the pump for dense alimentary products which must not be damaged mechanically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP97830155A 1996-04-04 1997-03-28 Epitrochoidische Pumpe Withdrawn EP0799996A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPR960017 1996-04-04
IT96PR000017A ITPR960017A1 (it) 1996-04-04 1996-04-04 Pompa epitrocoidale

Publications (2)

Publication Number Publication Date
EP0799996A2 true EP0799996A2 (de) 1997-10-08
EP0799996A3 EP0799996A3 (de) 1998-08-19

Family

ID=11396001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830155A Withdrawn EP0799996A3 (de) 1996-04-04 1997-03-28 Epitrochoidische Pumpe

Country Status (2)

Country Link
EP (1) EP0799996A3 (de)
IT (1) ITPR960017A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040011036A (ko) * 2002-07-26 2004-02-05 엘지전자 주식회사 반켈형 압축기의 마모방지구조
WO2006027548A1 (en) * 2004-09-07 2006-03-16 Pdd Innovations Limited Rotary pump with resiliently deformed seal
DE102004052928A1 (de) * 2004-10-29 2006-05-04 Herbert Jung Pumpe, insbesondere Dickstoffpumpe
US7520738B2 (en) 2002-09-05 2009-04-21 Centre National De La Recherche Scientifique (Cnrs) Closed system rotary machine
EP2722482A1 (de) * 2012-10-17 2014-04-23 Herbert Jung Rotationskolben-Verdrängermaschine
WO2018073620A1 (ru) * 2016-10-18 2018-04-26 Станиславс МИРОПОЛЕЦС Роторно-поршневой насос

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342088A (en) * 1940-07-27 1944-02-15 Trico Products Corp Pump
US4137024A (en) * 1977-07-18 1979-01-30 Curtiss-Wright Corporation Rotor for rotary piston mechanism
US4389172A (en) * 1980-10-20 1983-06-21 Curtiss-Wright Corporation Rotary compressor or expansion engine of hypotrochoidal configuration and angularly displaced gear means
US4551073A (en) * 1982-05-12 1985-11-05 Walter Schwab Pump for liquid and gaseous fluids, especially blood
GB2215403A (en) * 1988-03-10 1989-09-20 Hydrovane Compressor Rotary compressors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342088A (en) * 1940-07-27 1944-02-15 Trico Products Corp Pump
US4137024A (en) * 1977-07-18 1979-01-30 Curtiss-Wright Corporation Rotor for rotary piston mechanism
US4389172A (en) * 1980-10-20 1983-06-21 Curtiss-Wright Corporation Rotary compressor or expansion engine of hypotrochoidal configuration and angularly displaced gear means
US4551073A (en) * 1982-05-12 1985-11-05 Walter Schwab Pump for liquid and gaseous fluids, especially blood
GB2215403A (en) * 1988-03-10 1989-09-20 Hydrovane Compressor Rotary compressors

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040011036A (ko) * 2002-07-26 2004-02-05 엘지전자 주식회사 반켈형 압축기의 마모방지구조
US7520738B2 (en) 2002-09-05 2009-04-21 Centre National De La Recherche Scientifique (Cnrs) Closed system rotary machine
WO2006027548A1 (en) * 2004-09-07 2006-03-16 Pdd Innovations Limited Rotary pump with resiliently deformed seal
USRE47590E1 (en) * 2004-09-07 2019-09-03 Quantex Patents Limited Pump with conveying chamber formed in outer rotor surface
USRE44841E1 (en) * 2004-09-07 2014-04-15 Quantex Patents Limited Pump with conveying chamber formed in outer rotor surface
US7674100B2 (en) * 2004-09-07 2010-03-09 Pdd Innovations Ltd. Pump with conveying chamber formed in outer rotor surface
WO2006048212A2 (de) 2004-10-29 2006-05-11 Herbert Jung Pumpe, insbesondere dickstoffpumpe
DE102004052928B4 (de) * 2004-10-29 2009-06-04 Herbert Jung Pumpe, insbesondere Dickstoffpumpe
EA010914B1 (ru) * 2004-10-29 2008-12-30 Херберт Юнг Насос, в частности шламовый насос
CN101107447B (zh) * 2004-10-29 2010-06-02 赫伯特·琼 泵，尤其是泥浆泵
US8192183B2 (en) 2004-10-29 2012-06-05 Herbert Jung Prismatic pump, especially slurry pump
WO2006048212A3 (de) * 2004-10-29 2006-06-29 Herbert Jung Pumpe, insbesondere dickstoffpumpe
DE102004052928A1 (de) * 2004-10-29 2006-05-04 Herbert Jung Pumpe, insbesondere Dickstoffpumpe
EP2722482A1 (de) * 2012-10-17 2014-04-23 Herbert Jung Rotationskolben-Verdrängermaschine
WO2018073620A1 (ru) * 2016-10-18 2018-04-26 Станиславс МИРОПОЛЕЦС Роторно-поршневой насос

Also Published As

Publication number Publication date
EP0799996A3 (de) 1998-08-19
ITPR960017A1 (it) 1997-10-06
ITPR960017A0 (it) 1996-04-04

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