EP2028372B1 - Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip - Google Patents

Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip Download PDF

Info

Publication number
EP2028372B1
EP2028372B1 EP08018529.1A EP08018529A EP2028372B1 EP 2028372 B1 EP2028372 B1 EP 2028372B1 EP 08018529 A EP08018529 A EP 08018529A EP 2028372 B1 EP2028372 B1 EP 2028372B1
Authority
EP
European Patent Office
Prior art keywords
outer tube
stator
lining
sealing ring
eccentric screw
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.)
Ceased
Application number
EP08018529.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2028372A2 (de
EP2028372A3 (de
Inventor
Sebastian Jäger
Reiner Kramer
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.)
Artemis Kautschuk und Kunststoff Technik GmbH
Original Assignee
Artemis Kautschuk und Kunststoff Technik GmbH
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 Artemis Kautschuk und Kunststoff Technik GmbH filed Critical Artemis Kautschuk und Kunststoff Technik GmbH
Publication of EP2028372A2 publication Critical patent/EP2028372A2/de
Publication of EP2028372A3 publication Critical patent/EP2028372A3/de
Application granted granted Critical
Publication of EP2028372B1 publication Critical patent/EP2028372B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps

Definitions

  • the invention relates to a stator for an eccentric screw pump or an eccentric screw motor having an outer tube with a lining made of rubber or a rubber-like material and a shaped like a two- or multi-pitch thread for receiving a rigid, also shaped like a helical rotor, wherein the stator has in each case one more gear than the coarse thread of the rotor.
  • stators of the type mentioned in which the liner is adhesively bonded to an outer tube, that is, by chemical bonding between the elastomeric lining and a metallic outer tube.
  • the outer tube of this stator has a cylindrical shape.
  • stators are also known in which the shape of the outer tube is adapted to the shape of the cavity enclosed by the lining in such a way that the wall thickness of the lining, ie the distance between the cavity and the outer tube, is the same or almost the same.
  • an eccentric screw pump for spray guns.
  • a diaphragm seal is installed between the pump and a delivery line.
  • This has a tubular housing and a clamped in this piece of tubing. Between the hose and the housing thereby filled with hydraulic fluid pressure chamber is formed, to which a meter is connected.
  • the ends of the tube piece are secured by means of screwed onto the housing union nuts, which are provided with pressure pieces, which press the ends of the tube piece to the housing.
  • Rubber types such as HNBR, fluorinated rubbers or silicone rubbers, which remain functional at temperatures of 160 ° C and higher, but even with these rubbers, the rubber-metal compound is problematic, which can be destroyed in continuous use.
  • the object of the present invention is to provide an eccentric screw pump or an eccentric screw motor according to the Moineau principle, which has an improved tightness in the region of the end face of the lining.
  • the in Fig. 1 Stator shown has an outer tube 1 made of a solid material, for. As steel, in the interior of which the inner tubes 2 and 3 are located.
  • the outer tube 1 closest inner tube 2 has openings 4.
  • the inner tube 2 In the inner tube 2 is the inner tube 3.
  • the lining 6 of the outer tube 1 is in Fig. 1 not shown.
  • the openings 4 of the inner tube 2 and the openings 5 of the inner tube 3 are different in size, in particular, the openings 4 are larger.
  • the elastomer material of the lining surround the inner tube 3 through the openings 5, so that a particularly good adhesion between the lining 6 and the inner tube 3 and to the outer tube 1 is formed.
  • the inner tube 3 is almost embedded in the elastomer composition. 6
  • Fig. 2 is a cross section of a stator shown as in Fig. 1 is shown.
  • the inner tubes 2 and 3 which have the openings 4 and 5 in the outer tube 1.
  • the lining 6 is shown in the outer tube 1.
  • the lining 6 surrounds a bore 7, which is only roughly shown here.
  • the bore 7 forms the space for receiving the material to be conveyed (pump cavity) if the stator is used in an eccentric screw pump, or the space for receiving the flowing drive means, if the stator is part of a used as a motor device.
  • the bore 7 extends over the entire length of the stator. It is spiral-wound in two or more orbits and serves to receive a rotor, not shown here.
  • the forces occurring during use of the pump are absorbed by the lining 6 and forwarded to the outer tube 1, via which the bearing of the pump takes place. For a firm connection between outer tube 1 and lining 6 must therefore be taken care of. This happens through the inner tubes 2 and 3.
  • the inner tubes 2 and 3 are arranged, which have a perforation or a plurality of openings 4 and 5 respectively.
  • the openings 4 and 5 are filled by the material of the lining 6. This results in a positive connection between the outer tube 1, the inner tubes 2 and 3 and the lining 6, so that the lining 6 is secured both against displacement in the longitudinal direction and against rotation about its axis.
  • a connection made by vulcanization or gluing between outer tube and lining can be omitted.
  • the bore 7 is helically wound.
  • the outer tube 1 is shaped so that it runs parallel or nearly parallel to the outer contours of the cavity 7. As a result, a same, at least almost equal wall thickness of the lining 6 is achieved, which has proven to be advantageous in certain applications compared to stators with cylindrically shaped outer tubes.
  • the inner tubes 2 and 3 can be formed by commercially available perforated plates, which are bent cylindrically. To produce the stator, the inner tubes 2 and 3 are inserted into the outer tube 1 and all tubes 1, 2 and 3 are brought into the desired coiled shape. It is also possible, however, initially to deform the tubes 1, 2, and 3 separately from one another in order to then join them together, for instance by screwing the inner tubes 2 and 3 into the outer tube 1. Subsequently, the rubber material of the lining 6 can be introduced by spraying.
  • stator is made entirely without a firmly adhering connection between outer tube 1 and lining 6, although a mechanical, positive connection between the lining 6 and the inner tube 2 is formed, in contrast to stators with a chemical rubber-metal compound but can It can not be ruled out that leakage will occur through a gap between the outer tube 1 and the lining 6, resulting in a pressure drop between the suction side and the pressure side of the pump.
  • This can be prevented according to the invention by a clamping seal at the front ends of the lining 2. Two embodiments of such a clamping gasket will be described below with reference to the Fig. 3 and 4 be explained.
  • a conical sealing ring 10 is provided, which has a cylindrical portion 11, a conical portion 12 and a sealing bead 13.
  • the conical portion 12 is spaced from the inside of the outer tube 1 and formed so that its distance from the outer tube 1 increases toward the interior of the stator.
  • the sealing ring 10 is connected via a weld 14 to the outer tube 1.
  • the sealing ring 10 may be connected by a press fit with the outer tube 1 instead of a welded joint.
  • a clamping ring 15 is arranged on the sealing ring 10, which has a cylindrical portion 16, a conical portion 17 and a stop 18.
  • the sealing ring 10 is introduced into the outer tube 1, positioned and possibly fixed there before the material (rubber) of the lining 6 is introduced into the outer tube 1.
  • the clamping ring 15 is pressed axially.
  • the wall thickness of the clamping ring 15 is greater in the conical portion 17 than the wall thickness of the conical portion 12 of the sealing ring 10.
  • a simple sealing ring 20 is provided in the embodiment according to Fig. 4 .
  • This sealing ring 20 is suitable for installation after the introduction of the lining 6 in the outer tube 1.
  • the liner 6 made of rubber or similar material is connected to the pipes 1 and 2 via the injection process.
  • the end portion 21 of the lining 6 z. B. shaped as shown at 22 in dashed lines.
  • the sealing ring 20 which is partially conical, is inserted into the outer tube 1.
  • the end region 21 of the lining 6 is compressed by the conical region 24 of the sealing ring 20 and pressed firmly against the outer tube 1.
  • the sealing ring 20 may, as shown at 23, connected by a weld with the outer tube 1 and secured against axial displacement. According to another embodiment of the invention, the Seal 20 also be secured against displacement by a press fit between the sealing ring 20 and the outer tube 1.
  • Fig. 3 and 4 possibilities for sealing are shown. It is understood that these seals can be applied both in such stators, which z. B. have no coiled, but a cylindrical outer tube, as well as for coiled stators according to the Fig. 1 and 2 are suitable.
  • the outer tube 1 may also have openings. It is not mandatory that the outer tube 1 has a closed surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08018529.1A 2003-11-17 2004-11-17 Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip Ceased EP2028372B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/714,812 US7131827B2 (en) 2003-11-17 2003-11-17 Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle
EP04803164A EP1738078B1 (de) 2003-11-17 2004-11-17 Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04803164A Division EP1738078B1 (de) 2003-11-17 2004-11-17 Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip

Publications (3)

Publication Number Publication Date
EP2028372A2 EP2028372A2 (de) 2009-02-25
EP2028372A3 EP2028372A3 (de) 2014-08-27
EP2028372B1 true EP2028372B1 (de) 2015-07-29

Family

ID=34574064

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08018529.1A Ceased EP2028372B1 (de) 2003-11-17 2004-11-17 Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip
EP04803164A Ceased EP1738078B1 (de) 2003-11-17 2004-11-17 Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04803164A Ceased EP1738078B1 (de) 2003-11-17 2004-11-17 Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip

Country Status (6)

Country Link
US (2) US7131827B2 (pt)
EP (2) EP2028372B1 (pt)
BR (1) BRPI0416662B1 (pt)
CA (2) CA2712364C (pt)
DE (1) DE502004009512D1 (pt)
WO (1) WO2005047702A2 (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7407372B2 (en) * 2004-05-14 2008-08-05 Robbins & Myers Energy Systems L.P. Progressing cavity pump or motor
GB2424452B (en) * 2005-03-22 2011-01-19 Schlumberger Holdings Progressive cavity motor with rotor having an elastomer sleeve
DE102008054961A1 (de) * 2008-12-19 2010-07-01 Endress + Hauser Flowtec Ag Durchfluss-Messgerät und Verfahren zur Herstellung eines Messrohrs eines Durchfluss-Messgerätes
JP5364461B2 (ja) * 2009-06-17 2013-12-11 宇明泰化工股▲ふん▼有限公司 ポリテトラフルオロエチレン実撚糸及びその製造方法
US8523545B2 (en) * 2009-12-21 2013-09-03 Baker Hughes Incorporated Stator to housing lock in a progressing cavity pump
GB2481226A (en) * 2010-06-16 2011-12-21 Nat Oilwell Varco Lp Stator for a progressive cavity (PC) pump or motor
CN102725530B (zh) * 2010-08-25 2015-08-19 古河产机系统株式会社 单轴偏心螺杆泵中的定子密封结构
US8672656B2 (en) 2010-12-20 2014-03-18 Robbins & Myers Energy Systems L.P. Progressing cavity pump/motor
GB2499613B (en) 2012-02-22 2017-11-01 Nat Oilwell Varco Lp Stator for progressive cavity pump/motor
DE102012112044B4 (de) * 2012-05-04 2015-10-08 Netzsch Pumpen & Systeme Gmbh Selbstfixierendes Statorgehäuse
CA2939024C (en) 2014-02-12 2019-10-15 Roper Pump Company Hybrid elastomer/metal on metal motor
CN108050058B (zh) * 2017-12-06 2019-06-25 中石化石油机械股份有限公司研究院 采油螺杆泵
US11655815B2 (en) 2019-12-13 2023-05-23 Roper Pump Company, Llc Semi-rigid stator
DE102020004334A1 (de) 2020-07-20 2022-01-20 Wilhelm Kächele GmbH Stator für Exzenterschneckenmaschine
DE102021130260A1 (de) * 2021-11-19 2023-05-25 Wilhelm Kächele GmbH Stator für Exenterschneckenmaschine sowie Herstellungsverfahren für diesen
US12018688B2 (en) 2022-02-14 2024-06-25 Johnson & Johnson Surgical Vision, Inc. Sealing assembly for a progressive cavity pump
WO2023152594A1 (en) * 2022-02-14 2023-08-17 Johnson & Johnson Surgical Vision, Inc. A sealing assembly for a progressive cavity pump

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
US2700936A (en) * 1951-10-05 1955-02-01 Thompson Prod Inc Flexible helix rotor pump
US2862454A (en) * 1954-06-25 1958-12-02 Robbins & Myers Helical gear pumps
FR1414025A (fr) * 1964-09-03 1965-10-15 Loire Atel Forges Perfectionnements aux machines à extruder
US3139035A (en) * 1960-10-24 1964-06-30 Walter J O'connor Cavity pump mechanism
DE1553199C3 (de) * 1966-03-15 1974-03-07 Karl Dipl.-Ing. 7024 Bernhausen Schlecht Nachstellbarer Stator für eine Exzenter-Schraubenpumpe
GB1211987A (en) * 1968-04-29 1970-11-11 Stenberg Flygt Ab A screw pump provided with a radially movable rotor coupling
DE2250263C3 (de) * 1972-10-13 1978-09-28 Gummi-Jaeger Kg Gmbh & Cie, 3000 Hannover Nachstellbarer Stator für Exzenterschneckenpumpen
DE2541779A1 (de) * 1975-09-19 1977-03-31 Allweiler Ag Stator fuer exzenterschneckenpumpen
DE2713468C3 (de) * 1977-03-26 1982-09-02 Allweiler Ag, 7760 Radolfzell Stator für Exzenterschneckenpumpen
JPS61180512A (ja) * 1986-01-21 1986-08-13 日立電線株式会社 直接冷却型電力ケーブル線路の構成方法
US5171139A (en) * 1991-11-26 1992-12-15 Smith International, Inc. Moineau motor with conduits through the stator
DE4403598A1 (de) * 1994-02-07 1995-08-10 Arnold Jaeger Exzenterschneckenpumpe
DE19804260C2 (de) * 1998-02-04 2003-04-10 Artemis Kautschuk Kunststoff Elastomerstator für eine Exzenterschneckenpumpe
DE19827101A1 (de) * 1998-06-18 1999-12-23 Artemis Kautschuk Kunststoff Nach dem Moineau-Prinzip arbeitende Maschine für den Einsatz in Tiefbohrungen
DE19842754C2 (de) 1998-09-18 2001-04-26 Seepex Seeberger Gmbh & Co Exzenterschneckenpumpe
DE29822365U1 (de) * 1998-12-16 1999-04-01 Artemis Kautschuk- Kunststoff-Technik GmbH & Cie, 30559 Hannover Elastomerstator für Exzenterschneckenpumpen
DE29909039U1 (de) * 1999-05-22 1999-09-23 J. Wagner Gmbh, 88048 Friedrichshafen Förderpumpe mit Förderleitung
DE19950257B4 (de) * 1999-10-18 2013-01-17 Wilhelm Kächele GmbH Elastomertechnik Exzenterschneckenpumpe mit vollausgekleidetem Stator
DE20013030U1 (de) * 2000-07-20 2000-12-07 Artemis Kautschuk- und Kunststofftechnik GmbH & Cie, 30559 Hannover Verdrehsicherung für Statoren von Exzenterschneckenpumpen

Also Published As

Publication number Publication date
WO2005047702A2 (de) 2005-05-26
US7131827B2 (en) 2006-11-07
US20050106052A1 (en) 2005-05-19
EP1738078A2 (de) 2007-01-03
EP2028372A2 (de) 2009-02-25
CA2712364A1 (en) 2005-05-17
BRPI0416662B1 (pt) 2017-02-07
CA2473001A1 (en) 2005-05-17
US7329106B2 (en) 2008-02-12
BRPI0416662A (pt) 2007-01-16
CA2473001C (en) 2011-04-19
CA2712364C (en) 2013-08-27
US20070053783A1 (en) 2007-03-08
EP2028372A3 (de) 2014-08-27
WO2005047702A3 (de) 2005-11-24
DE502004009512D1 (de) 2009-07-02
EP1738078B1 (de) 2009-05-20

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