EP1738078A2 - Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip - Google Patents
Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzipInfo
- Publication number
- EP1738078A2 EP1738078A2 EP04803164A EP04803164A EP1738078A2 EP 1738078 A2 EP1738078 A2 EP 1738078A2 EP 04803164 A EP04803164 A EP 04803164A EP 04803164 A EP04803164 A EP 04803164A EP 1738078 A2 EP1738078 A2 EP 1738078A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- lining
- outer tube
- sealing ring
- stator according
- 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
Links
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, which has an outer tube with a lining made of rubber or a gu mi-like material and a cavity shaped in the manner of a two- or multi-start helical thread for receiving a rigid rotor, also shaped in the manner of a helical thread , wherein the stator has one gear more than the steep thread of the rotor.
- the mode of operation of eccentric screw pumps and motors is also referred to as the Moineau principle.
- a stator of the type mentioned is known, in which the lining is firmly adhered to the outer tube, ie 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 matched to the shape of the cavity enclosed by the lining in such a way that the wall thickness of the lining, that is to say the Distance between the cavity and the outer tube is the same or almost the same throughout.
- the invention has for its object to provide a stator that remains functional even under conditions under which the tight bond between the lining and the outer tube z. B. could be destroyed by chemical influences or high temperatures.
- the tubes having openings thus effect the connection between the outer tube and the lining.
- the tubes having the openings are preferably made of metal.
- the stator has two inner tubes, which are pushed into one another and have distinctly different hole diameters. This has the advantage that there are cavities that result in undercuts filled with rubber. This effectively prevents radial displacement of the lining under load.
- the inner tube of the tubes with two openings is naturally enclosed by it more than the inner tube, which is closer to the outer tube.
- the latter tube acts as a spacer and has the task of ensuring a minimum distance between the inner tube, which has openings, and the outer tube.
- the lining can completely or almost completely enclose the inner tube.
- the lining also has contact with the outer tube, namely through the openings which the middle tube has.
- the rubber coating ie the introduction of the elastomer lining into the outer tube
- the rubber coating can be carried out without a bond-friendly pretreatment of the metal surfaces, for example by using an adhesion promoter.
- the rubber coating can also be carried out using a chemical bonding system, e.g. B. an adhesion promoter. If the chemical bond between rubber and metal is destroyed chemically, by exposure to heat and / or by mechanical action, the mechanical clawing continues to ensure the function of the stator. Further details of the invention are explained with reference to the drawing, in which exemplary embodiments of the invention are shown.
- FIG. 1 is a perspective view of an embodiment of the invention with partially exposed layers (without lining)
- FIG. 2 shows a cross section through the stator according to FIG. 1
- Fig. 3 shows a longitudinal section through the end piece of a further embodiment of the stator according to the invention according to claim 2 and
- FIG. 4 shows a longitudinal section through the end piece of a further embodiment of the stator according to the invention according to claim 2
- the stator shown in Fig. 1 has an outer tube 1 made of a solid material, for. B. steel, on the inside of which the inner tubes 2 and 3 are located.
- the inner tube 2 closest to the outer tube 1 has openings 4.
- the inner tube 3 is located in the inner tube 2.
- the lining 6 of the outer tube is not shown in FIG. 1.
- the openings 4 of the inner tube 2 and the openings 5 of the inner tube 3 are of different sizes in an advantageous embodiment of the invention, in particular the openings 4 are larger.
- the elastomer material of the lining can enclose the inner tube 3 through the openings 5, so that there is particularly good adhesion between the lining 6 and the inner tube 3 and to the outer tube 1.
- the inner tube 3 is almost embedded in the elastomer mass 6.
- FIG. 2 shows a cross section of a stator as shown in FIG. 1.
- the inner tubes 2 and 3 which have the openings 4 and 5, are located in the outer tube 1.
- the lining 6 in the outer tube 1 is also shown.
- the lining 6 encloses the bore 7, which is shown only roughly here.
- the bore 7 forms the space for receiving the conveyed material (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 device used as a motor.
- the bore 7 extends over the entire length of the stator. It is wound in two or more threads in a helical shape and serves to accommodate a rotor, not shown here.
- the forces occurring when the pump is used are absorbed by the lining 6 and passed on to the outer tube 1, via which the pump is supported. A firm connection between outer tube 1 and lining 2 must therefore be ensured. According to the invention, this takes place through the inner tubes 2 and 3.
- the inner tubes 2 and 3 are arranged in the outer tube 1 and have perforations or a plurality of openings 4 and 5, respectively.
- the openings 4 and 5 are filled with 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 2 is secured both against displacement in the longitudinal direction and against rotation about its axis.
- a connection between the outer tube and the lining produced by vulcanization or gluing can be omitted. However, it is not imperative for the invention that gluing or vulcanization is dispensed with.
- the bore 7 is wound helically.
- the outer tube 1 is shaped such that it runs parallel or almost parallel to the outer contours of the cavity 7. This achieves the same, at least almost the same wall thickness of the lining 6, which has proven to be advantageous in certain applications compared to stators with cylindrical outer tubes.
- the inner tubes 2 and 3 can be formed by commercially available perforated sheets which are bent cylindrically. To produce a stator according to the invention, the inner tubes 2 and 3 are inserted into the outer tube 1 and all tubes 1, 2 and 3 m are brought into the desired helical shape. However, it is also possible to first deform the pipes 1, 2 and 3 separately from one another in order to then join them together, for example by turning the inner pipes 2 and 3 m to the outer pipe 1. The rubber material of the lining 2 can then be introduced by spraying.
- the inner tube 2 also from a hose made of elastomer material or the like. , especially rubber.
- This hose not shown, is pushed over the inner tube 3.
- the inner tube 3 and the hose are then placed in the outer tube 1.
- the hose can also have openings into which the elastomer material of the lining 6 can flow.
- a conical sealing ring 10 is provided on the end face of the lining 2, which has a cylindrical section 11, a conical section 12 and a sealing bead 13.
- the conical section 12 is spaced from the inside of the outer tube 1 and is designed such that its distance from the outer tube 1 to the inside of the stator increases.
- the sealing ring 10 is connected to the outer tube 1 via a weld seam 14.
- the sealing ring 10 can also be connected to the outer tube 1 by a press fit instead of by a welded connection.
- a clamping ring 15 is arranged on the sealing ring 10, which has a cylindrical section 16, a conical section 17 and a stop 18.
- the sealing ring is introduced 10 m into the outer tube 1, positioned and, if necessary, fastened there before the material (rubber) of the lining is introduced 2 m into the outer tube 1.
- a conical annular gap 19 between the conical section 12 of the sealing ring 10 and the outer tube 1 is filled with rubber.
- the rubber shrinks when cooling, both from the outer tube 1 and from the sealing ring 10.
- the clamping ring 15 is pressed axially.
- the wall thickness of the clamping ring 15 in the conical section 17 is greater than the wall thickness of the conical section 12 of the sealing ring 10. This ensures that the conical section 17 of the clamping ring 15 presses the conical section 12 of the sealing ring 10 outwards.
- the sealing bead 13 of the sealing ring 10 prevents the rubber from slipping out of the annular gap 19 under operating conditions.
- a simple sealing ring 20 is provided on the end face of the lining. This sealing ring 20 is suitable for installation after inserting the lining 2 m the outer tube.
- the lining 2 is first made of rubber or a similar material over the Injection process connected to pipes 1 and 4.
- the end region 21 of the lining 2 is z. B. shaped as shown in dashed lines at 22.
- the sealing ring 20 which is partially conical, is inserted into the outer tube 1 after the lining 2 has been vulcanized.
- the end region 21 of the lining 2 is compressed by the conical region 24 of the sealing ring 20 and pressed firmly against the outer tube 1.
- the sealing ring 20 can, as shown at 23, be connected to the outer tube 1 by a weld seam and thus be secured against axial displacement. According to another embodiment of the invention, the sealing ring 20 can also be secured against displacement by an interference fit between the sealing ring 20 and the outer tube 20.
- the outer tube 1 can also have openings. It is not essential that the outer tube 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)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08018529.1A EP2028372B1 (de) | 2003-11-17 | 2004-11-17 | Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip |
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 |
PCT/EP2004/013037 WO2005047702A2 (de) | 2003-11-17 | 2004-11-17 | Stator für eine exzenterschneckenpumpe oder einen exzenterschneckenmotor nach dem moineau-prinzip |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08018529.1A Division EP2028372B1 (de) | 2003-11-17 | 2004-11-17 | Stator für eine Exzenterschneckenpumpe oder einen Exzenterschenkenmotor nach dem Moineau-Prinzip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1738078A2 true EP1738078A2 (de) | 2007-01-03 |
EP1738078B1 EP1738078B1 (de) | 2009-05-20 |
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 Before (1)
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 |
Country Status (6)
Country | Link |
---|---|
US (2) | US7131827B2 (de) |
EP (2) | EP2028372B1 (de) |
BR (1) | BRPI0416662B1 (de) |
CA (2) | CA2712364C (de) |
DE (1) | DE502004009512D1 (de) |
WO (1) | WO2005047702A2 (de) |
Families Citing this family (17)
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 |
KR101837782B1 (ko) * | 2010-08-25 | 2018-03-12 | 후루카와 산키 시스테무즈 가부시키가이샤 | 일축 편심 나사 펌프에 있어서의 스테이터 씨일 구조 |
US8672656B2 (en) | 2010-12-20 | 2014-03-18 | Robbins & Myers Energy Systems L.P. | Progressing cavity pump/motor |
GB2551304B (en) | 2012-02-22 | 2018-02-28 | Nat Oilwell Varco Lp | Stator for progressive cavity pump/motor |
DE102012112044B4 (de) * | 2012-05-04 | 2015-10-08 | Netzsch Pumpen & Systeme Gmbh | Selbstfixierendes Statorgehäuse |
WO2015123288A2 (en) | 2014-02-12 | 2015-08-20 | 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 |
WO2023152594A1 (en) * | 2022-02-14 | 2023-08-17 | Johnson & Johnson Surgical Vision, Inc. | A sealing assembly for a progressive cavity pump |
US12018688B2 (en) | 2022-02-14 | 2024-06-25 | Johnson & Johnson Surgical Vision, Inc. | Sealing assembly for a progressive cavity pump |
Family Cites Families (19)
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 |
-
2003
- 2003-11-17 US US10/714,812 patent/US7131827B2/en not_active Expired - Lifetime
-
2004
- 2004-07-06 CA CA2712364A patent/CA2712364C/en not_active Expired - Fee Related
- 2004-07-06 CA CA2473001A patent/CA2473001C/en not_active Expired - Fee Related
- 2004-11-17 EP EP08018529.1A patent/EP2028372B1/de not_active Ceased
- 2004-11-17 BR BRPI0416662A patent/BRPI0416662B1/pt not_active IP Right Cessation
- 2004-11-17 DE DE502004009512T patent/DE502004009512D1/de active Active
- 2004-11-17 EP EP04803164A patent/EP1738078B1/de not_active Ceased
- 2004-11-17 WO PCT/EP2004/013037 patent/WO2005047702A2/de active Application Filing
-
2006
- 2006-11-07 US US11/593,740 patent/US7329106B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005047702A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005047702A3 (de) | 2005-11-24 |
CA2712364A1 (en) | 2005-05-17 |
WO2005047702A2 (de) | 2005-05-26 |
EP1738078B1 (de) | 2009-05-20 |
EP2028372A3 (de) | 2014-08-27 |
BRPI0416662B1 (pt) | 2017-02-07 |
US7131827B2 (en) | 2006-11-07 |
CA2473001C (en) | 2011-04-19 |
DE502004009512D1 (de) | 2009-07-02 |
EP2028372A2 (de) | 2009-02-25 |
US20070053783A1 (en) | 2007-03-08 |
CA2473001A1 (en) | 2005-05-17 |
BRPI0416662A (pt) | 2007-01-16 |
US7329106B2 (en) | 2008-02-12 |
US20050106052A1 (en) | 2005-05-19 |
EP2028372B1 (de) | 2015-07-29 |
CA2712364C (en) | 2013-08-27 |
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