EP3179107A1 - Pompe a piston rotatif - Google Patents

Pompe a piston rotatif Download PDF

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Publication number
EP3179107A1
EP3179107A1 EP16193215.7A EP16193215A EP3179107A1 EP 3179107 A1 EP3179107 A1 EP 3179107A1 EP 16193215 A EP16193215 A EP 16193215A EP 3179107 A1 EP3179107 A1 EP 3179107A1
Authority
EP
European Patent Office
Prior art keywords
universal
rotary piston
joint
disk element
semi
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
EP16193215.7A
Other languages
German (de)
English (en)
Other versions
EP3179107B1 (fr
Inventor
Gert Marmor
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.)
MARMOR, GERT
Sincera Assets Oue
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Sincera Assets Oue
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Publication date
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Publication of EP3179107A1 publication Critical patent/EP3179107A1/fr
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Active 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
    • F04C3/00—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type
    • F04C3/06—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees
    • 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
    • F04C9/00—Oscillating-piston machines or pumps
    • 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
    • F04C9/00—Oscillating-piston machines or pumps
    • F04C9/005—Oscillating-piston machines or pumps the piston oscillating in the space, e.g. around a fixed point

Definitions

  • Present invention relates to a positive displacement pump, more precisely to a rotary piston pump, where the rotary piston i.e. rotor is formed on the principle of a universal-joint or Hooke's joint.
  • the state of the art includes many known rotary piston pumps and rotary piston internal combustion engines with a similar design.
  • the universal-joint or the Hooke's joint or the cross-joint comprises two opposing universal-joint forks (yokes) having intersecting axes of rotation, where said forks are connected by a universal-joint spider (also called trunnion cross), where on spider arms (i.e. on the ends of two crosswise shafts forming said cross) there are four bearings, two for each fork.
  • forks of the universal-joint are formed by two opposing rotor halves of the rotary piston and the universal-joint spider is included in the disk element between said rotor halves.
  • This solution comprises housing, in the spherical piston chamber of the housing two rotor halves of the rotary piston connected by a universal-joint spider, where said universal-joint spider is included in the disk element between the rotor halves and where the rotation axes of said rotor halves are at an angle to each other and where the spherical piston chamber is divided by said disk element between the corresponding opposite faces of the rotor halves, the spherical wall of the piston chamber and the sides of the disk element into four mutually separated spatial compartments having changing volume due to the rotation of the rotor.
  • the rotary piston of the pump is usually made from stainless steel and processing of stainless steel is refractory, especially if the spherical outer surface of the piston is considered.
  • the rotary piston is located in the pump housing in the spherical piston chamber, whereas manufacturing of said chamber in such a way that it has a fit that the rotary piston can rotate in the chamber freely but sits in the chamber sufficiently snugly to pump fluid medium, is also problematic, time consuming and relatively expensive.
  • Present invention provides a rotary piston pump comprising pump housing with inlet and outlet orifices and in the spherical piston chamber of the pump housing two rotor halves connected by a universal-joint spider.
  • the rotation axes of the rotor halves are at an angle in relation to each other.
  • the universal-joint spider is located in the disk element between the rotor halves, where the spherical pump chamber (i.e. piston chamber) is divided by said disk element between the corresponding opposite end faces of the rotor halves, the spherical wall of the pump chamber and the sides of the disk element into four mutually separated spatial compartments having changing volume due to the rotation of the rotor.
  • the spherical pump chamber i.e. piston chamber
  • the distinctive feature of the invention is that the spider arms of the universal-joint spider included in the disk element are formed as semi-axles which are connected by their corresponding end into the spherical part at the centre of the disk element, where on the other end of each semi-axle there is a bearing of the spider arm of the universal-joint spider.
  • each bearing of the spider arm at the end of each semi-axle of the universal-joint is formed as a so called sleeve bearing comprising an inner bearing sleeve, which is located rotatably in the outer bearing sleeve in the joint of the corresponding rotor half.
  • both inner and outer bearing sleeves are replaceable.
  • the outer bearing sleeves are ceramic bearing sleeves.
  • both inner and outer bearing sleeves are ceramic bearing sleeves.
  • the ceramic bearing sleeves are mounted by means of an adhesive joint.
  • bearing sleeves can be mounted by means of a snap ring (retaining ring).
  • the bearing sleeves made of metal are preferably mounted by means of an interference fit - it means, that the inner bearing sleeve is mounted by means of an interference fit onto the spider arm of the universal-joint spider and the outer bearing sleeve is mounted by means of an interference fit into the joint of the rotor half (i.e. at the end of the prong of the fork.)
  • the bearings at the end of the semi-axles of the universal-joint are needle roller bearings.
  • the needle roller bearings are used for example for pumping the fluid medium with lubricating properties, such as oils, fuels, etc.
  • the semi-axles of the universal-joint are connected to the spherical part at the centre of the disk element by an interference fit.
  • the semi-axles of the universal-joint are connected to the spherical part at the centre of the disk element by a threaded joint.
  • bearings and seals of the axles of the rotor halves are omitted, also the fixation means of the pump housing and other components thereof are omitted.
  • the housing of the rotary piston pump consists of two housing halves 1 and 2, comprising two concave spherical surfaces 3 and 4, which form a part of the spherical piston chamber, when the housing halves are mounted together.
  • the surfaces of the covers 5 and 6 facing the corresponding housing halves 3 and 4 are spherical and form the rest of the spherical piston chamber in the pump housing.
  • the pump housing is split at the plane of the rotation axes of axles 11 and 12 of rotor halves 9 and 10 of the rotary piston.
  • the bearings and seals of the axles 11 and 12 are not shown in drawings.
  • One of the axles of the rotor halves is connected to the drive motor of the pump, which is usually an electric motor (not shown).
  • the rotary piston consists of the two rotor halves 9 and 10, which are connected by a universal-joint spider included in the disk element 13. Both rotor halves 9 and 10 comprise two coaxial joints 14. Inside each of the joints 14 there is a spider arm 15 with a bearing.
  • the universal-joint spider is formed into the disk element 13 as follows. In the centre of the disk element there is a spherical part 16. Four holes 17 into the spherical part 16 are made - each hole is intended for fixing into it the corresponding end 19 of semi-axle 18 for forming one corresponding spider arm 15 of the universal-joint spider. In the embodiment as shown in the drawings each semi-axle 18 is fitted into the corresponding hole 17 in the spherical part 16 of the disk element 13 by means of an interference fit. But also a threaded joint can be used, which enables easier replacement of the semi-axles during repairs.
  • the pairs spider arms 15 are in pairs coaxial to each other - the axes of said pairs of arms are mutually perpendicular and said axes are positioned in the imaginary centre plane of the disk part of the disk element 13.
  • each semi-axle 18 In each semi-axle 18 the other end of it forms a spider arm 15.
  • the two coaxial semi-axles 18 with their arms 15 on the opposite sides of the spherical part 16 are intended to be connected by means of a bearing into one of the joints 14 of one rotor half and the other two coaxial semi-axles 18 with their arms 15 on the opposite sides of spherical part 16 are intended to be connected by means of a bearing into one of the joints 14 of the other rotor half.
  • the disk element 13 includes cutouts 20 and 21 made for the semi-axles 18.
  • the cutout 20 receives the cylindrical part of the semi-axle 18 and the cutout 21 receives the joint 14 of the corresponding rotor half 9 or 10.
  • the joint 14 is placed into the cutout 21 by means of a loose fit.
  • the bearing of the spider arm 15 comprises two sleeves in the embodiment of the drawings - an inner bearing sleeve 22 and an outer bearing sleeve 23.
  • the inner bearing sleeve 22 is fixed onto the spider arm 15 and the outer bearing sleeve 23 is fixed into the joint 14 of the corresponding rotor half.
  • the corresponding inner bearing sleeve 22 is fixed onto the spider arm 15 by means of an interference fit and also the outer bearing sleeve 23 is fixed into the joint 14 of the rotor half by means of an interference fit.
  • bearing sleeves 22, 23 being made of ceramic material
  • said bearing sleeves are fixed by means of an adhesive joint.
  • the ceramic bearing sleeves are used for example when pumping abrasive medium.
  • the rotor halves 9 and 10 of the rotary piston have the same design and they have symmetrical shape in relation to their corresponding axles 11 and 12.
  • the rotor halves 9 and 10 On the side of the axles 11 and 12 the rotor halves 9 and 10 have a spherical shape corresponding to the shape of the concave spherical surfaces 3 and 4 in the housing halves 1 and 2.
  • the end faces 24 of both rotor halves 9, 10 have a cuneiform shape, where the imaginary crest of the cuneiform shape is parallel to the imaginary common axis of the coaxial pair of joints 14 of the corresponding rotor half 9, 10.
  • the end face 24 includes a spherical concave part 25, the shape of which corresponds to the spherical part 16 in the centre of the disk element 13.
  • the imaginary centre point of the spherical concave part 25 is located on the rotating axis of the axles 11, 12 of the corresponding rotor halves 9, 10 and at the same time also the imaginary axis of the pair of the coaxial joint 14 of the corresponding rotor half 9, 10 runs through said centre point.
  • the end faces 24 of the rotor halves 9 and 10 comprise recesses correspondingly shaped to receive the joint 14 and the semi-axle 18.
  • the perimeter of the disk element 13 corresponds to the diameter of the spherical piston chamber and said disk element is placed into said chamber by means of a loose fit.
  • the semi-axles 18 comprise two cutouts 26 preferably on the opposite sides of the semi-axle 18 in order to allow the bearing sleeve 22 or the needle roller bearing to be removed from the spider arm 15.
  • those cutouts 26 can be used to unscrew or tighten said threaded joint of the semi-axles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP16193215.7A 2015-10-29 2016-10-11 Pompe a piston rotatif Active EP3179107B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EEU201500075U EE01355U1 (et) 2015-10-29 2015-10-29 Pöördkolbpump

Publications (2)

Publication Number Publication Date
EP3179107A1 true EP3179107A1 (fr) 2017-06-14
EP3179107B1 EP3179107B1 (fr) 2018-12-19

Family

ID=58793999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16193215.7A Active EP3179107B1 (fr) 2015-10-29 2016-10-11 Pompe a piston rotatif

Country Status (3)

Country Link
EP (1) EP3179107B1 (fr)
EA (1) EA031891B1 (fr)
EE (1) EE01355U1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204760A (en) 1938-06-09 1940-06-18 Jensen Ole Fluid control device
US2727465A (en) 1950-05-27 1955-12-20 Brandt Soc Nouv Ets Rotovolumetrical pump
GB2115490A (en) * 1982-02-25 1983-09-07 Zoltan Szirmay Rotary positive-displacement fluid-machines
WO1984000997A1 (fr) * 1982-09-10 1984-03-15 D Michael Keisler Moteur a combustion interne possedant une chambre spherique
US5171142A (en) 1987-05-25 1992-12-15 Tselevoi Nauchno-Tekhnichesky Kooperativ "Stimer" Rotary displacement machine with cylindrical pretension on disc-shaped partition
US5199864A (en) * 1990-09-28 1993-04-06 Southwest Research Institute Spherical fluid pump or motor with spherical ball comprising two parts
WO2009053764A1 (fr) 2007-10-03 2009-04-30 Nagy Zoltan Dispositif rotatif à volume variable, moteur sphérique à deux temps efficace

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816039A (en) * 1971-08-02 1974-06-11 Commercial Metals Co Rotary air pump with rotating and oscillating center piston
US5127810A (en) * 1991-01-02 1992-07-07 Kolbinger Herman J Rotary pump or engine with spherical body
DE102009000939A1 (de) * 2009-02-13 2010-08-19 Deere & Company, Moline Verbindungsanordnung zur Verbindung eines Mähmessers mit einem Mähmesserantriebszapfen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204760A (en) 1938-06-09 1940-06-18 Jensen Ole Fluid control device
US2727465A (en) 1950-05-27 1955-12-20 Brandt Soc Nouv Ets Rotovolumetrical pump
GB2115490A (en) * 1982-02-25 1983-09-07 Zoltan Szirmay Rotary positive-displacement fluid-machines
WO1984000997A1 (fr) * 1982-09-10 1984-03-15 D Michael Keisler Moteur a combustion interne possedant une chambre spherique
US5171142A (en) 1987-05-25 1992-12-15 Tselevoi Nauchno-Tekhnichesky Kooperativ "Stimer" Rotary displacement machine with cylindrical pretension on disc-shaped partition
US5199864A (en) * 1990-09-28 1993-04-06 Southwest Research Institute Spherical fluid pump or motor with spherical ball comprising two parts
WO2009053764A1 (fr) 2007-10-03 2009-04-30 Nagy Zoltan Dispositif rotatif à volume variable, moteur sphérique à deux temps efficace

Also Published As

Publication number Publication date
EE01355U1 (et) 2016-05-16
EA201691961A1 (ru) 2017-05-31
EP3179107B1 (fr) 2018-12-19
EA031891B1 (ru) 2019-03-29

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