EP1733147A2 - Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle - Google Patents
Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principleInfo
- Publication number
- EP1733147A2 EP1733147A2 EP04803161A EP04803161A EP1733147A2 EP 1733147 A2 EP1733147 A2 EP 1733147A2 EP 04803161 A EP04803161 A EP 04803161A EP 04803161 A EP04803161 A EP 04803161A EP 1733147 A2 EP1733147 A2 EP 1733147A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- inner tube
- outer tube
- stator according
- thread
- 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
Definitions
- the invention relates to a stator for an eccentric screw pump or an eccentric screw motor with a stator, which has an outer tube with a lining made of rubber or a rubber-like material and a cavity shaped in the manner of a two- or multi-start helical thread for receiving a rigid, also shaped in the manner of a helical thread Has rotor, the steep thread of the stator each has a gear more than the steep thread of the rotor.
- the invention has for its object to provide a stator that remains functional even under conditions where the tight bond between the liner and the outer tube z. B. would be destroyed by chemical influences or high temperatures.
- This object is achieved in that an inner tube provided with openings is arranged in the lining.
- the lining's elastomeric material clings to the inner tube by penetrating the openings. This results in a positive connection between the individual parts of the stator, which is far better suited to withstand the loads described above than a chemical rubber-metal connection, for example by means of an adhesion promoter.
- spacer strips are arranged between the outer tube and the inner tube.
- the elastomer material of the lining can not only penetrate the openings in the inner tube. It can also, at least in the area between the spacer strips
- the inner tube Enclose inner tube and has a flat contact to the outer tube in these areas.
- the inner tube can be connected to the outer tube, e.g. B. by welding on the end faces or holes that penetrate the outer tube.
- the spacer strips achieve a particularly firm and secure connection between the parts of the stator without significantly increasing the effort involved in manufacturing the stator and with regard to the components used.
- the stator is usually produced in such a way that the elastomer material that is to form the lining is introduced into the outer tube by spraying, the inner tube already being arranged in the outer tube.
- the spacer strips prevent the inner tube from being pushed towards the outer tube by the spray pressure. They thus ensure that there is sufficient space between the outer tube and inner tube, which the elastomer material fills, which passes through the openings in the interior, thereby creating undercuts which ensure a very good positive connection with the inner tube.
- the spacer strips can be straight, flat profiles which extend in the direction of the longitudinal axis of the stator and practically over most of its length, several spacer strips of this type being arranged distributed over the circumference of the inner tube.
- the spacer strips are annular and enclose the circumference of the inner tube, it being possible for a plurality of such rings to be arranged spaced apart in the longitudinal direction on a stator.
- the spacer bar can be helical. This embodiment has the advantage that a single spacer bar of this type may already be sufficient.
- a similar intimate claw between the Elsto material of the lining and the inner tube can also be achieved by a further embodiment of the invention by the inner tube having perforations is wave-shaped, it being immaterial whether the waveform is chosen in the axial or radial direction of the inner tube ,
- spacer bar / s in cross section is not limited. It can e.g. B. round, square and / or rectangular spacer strips can be used.
- FIG. 2 shows another embodiment of the stator according to the invention in cross section
- FIG. 3 shows a section of the outer and inner tubes of a stator according to FIG. 2 in a perspective view with partially exposed layers
- FIG. 5 shows the perspective illustration of a further embodiment according to the invention with partially exposed layers
- FIG. 6 shows a longitudinal section through the end piece of a stator according to FIG. 2,
- FIG. 7 shows a longitudinal section through the end piece of a stator according to FIG. 2 in a modified version compared to FIG. 6,
- FIG. 8 shows a further embodiment of a stator according to the invention in cross section
- Fig. 9 shows another embodiment of a stator according to the invention in longitudinal section
- FIG. 10 shows a further embodiment of a stator.
- the stator shown in Fig. 1 has an outer tube 1 made of a solid material, for. B. steel, on the inside of which a lining 2 made of rubber or a rubber-like material is arranged.
- the lining 2 has a bore 3, which is shown only roughly in the drawing.
- the bore 3 forms the space for receiving the rotor (not shown) and 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 device used as a motor is.
- the bore 3 extends over the entire length of the stator.
- an inner tube 4 is arranged in the outer tube 1, which has a perforation or a plurality of openings 5 and which is firmly connected to the outer tube 1.
- the openings 5 are filled with the material of the lining 2. This results in a positive connection between the outer tube 1 and the liner 2, which secures the liner 2 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.
- FIGS. 2 and 3 has the same components as the stator according to FIG. 1, but here there are spacers 6 between the outer tube 1 and the inner tube 4 are arranged.
- FIG. 2 shows the cross section of the stator shown in perspective in FIG. 3.
- the number of four spacer strips 4 selected in FIGS. 2 and 3 is exemplary.
- the inner tube 4 can either consist of a tube having openings or be formed from a commercially available perforated plate which is bent cylindrically. To produce a stator according to the invention, the inner tube 4 and the spacer strips 6 m are pushed the outer tube 1. The rubber material of the lining 2 can then be introduced by spraying.
- FIG. 4 and 5 show two possibilities of how the spacer strips 6 ', 6 "' can be arranged between the outer tube 1 and the inner tube 4. While in FIG. 4, a spacer strip 6 'surrounds the inner tube 4 in a helical shape 5 a ring formed from the spacer bar 6 'around the inner tube 4. It goes without saying that a plurality of rings 6 "" can be arranged distributed around the inner tube 4 (not shown here). It is also not mandatory, only to use a spacer strip 6 'which surrounds the inner tube 4. Two or more spacer strips can also be attached according to the invention.
- connection can be made by welding at the front 8, which
- connection can be made by spot welds 9, which are provided at various locations in bores distributed across the circumference and the length of the stator and which penetrate the outer tube 1 and the spacer bar 6 (FIG. 7).
- the outer tube 1 and the inner tube 4 can be connected to one another by an interference fit.
- connection techniques mentioned here can also be used if only one inner tube is used, that is to say without the spacer strips 6, 6 'or 6' ', as shown in FIG. 1.
- the inner tube 4 has elevations 7 which extend outwards, that is to say in the direction of the outer tube 1. These elevations then ensure the desired spacing from the outer tube 1, so that the spacer bar / spacer bars 6 can be omitted.
- the elastomer material of the lining 2 can then also enclose the inner tube.
- the spacer strip (s) can also be dispensed with, for example, if the inner tube is designed in a wave shape.
- FIG. 8 shows such a special embodiment.
- the wave form of the inner tube 4 continues in the circumferential direction
- FIG. 9 shows a stator in which the inner tube 4 is deformed in a wave shape in the axial direction.
- the inner tube is enclosed by the elastomer compound.
- the waveform could also continue helically around the longitudinal axis of the stator (not shown here).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/725,967 US7316548B2 (en) | 2003-11-17 | 2003-11-17 | Stator for an eccentric screw pump or an eccentric worm motor operating on the Moineau principle |
PCT/EP2004/013029 WO2005047701A2 (en) | 2003-11-17 | 2004-11-17 | Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1733147A2 true EP1733147A2 (en) | 2006-12-20 |
EP1733147B1 EP1733147B1 (en) | 2016-12-28 |
Family
ID=34574704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04803161.1A Ceased EP1733147B1 (en) | 2003-11-17 | 2004-11-17 | Stator for an eccentric spiral pump or an eccentric worm motor according to the moineau principle |
Country Status (5)
Country | Link |
---|---|
US (1) | US7316548B2 (en) |
EP (1) | EP1733147B1 (en) |
BR (1) | BRPI0416634A (en) |
CA (1) | CA2473282C (en) |
WO (1) | WO2005047701A2 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005308210A (en) * | 2004-03-26 | 2005-11-04 | Hitachi Metals Ltd | Flexible pipe |
US7407372B2 (en) | 2004-05-14 | 2008-08-05 | Robbins & Myers Energy Systems L.P. | Progressing cavity pump or motor |
US7739792B2 (en) * | 2006-07-31 | 2010-06-22 | Schlumberger Technology Corporation | Method of forming controlled thickness resilient material lined stator |
US9163629B2 (en) | 2006-07-31 | 2015-10-20 | Schlumberger Technology Corporation | Controlled thickness resilient material lined stator and method of forming |
CA2976959C (en) | 2009-08-21 | 2019-12-17 | Titeflex Corporation | Energy dissipative tubes, sealing devices, and methods of fabricating and installing the same |
GB2481226A (en) * | 2010-06-16 | 2011-12-21 | Nat Oilwell Varco Lp | Stator for a progressive cavity (PC) pump or motor |
US9309767B2 (en) | 2010-08-16 | 2016-04-12 | National Oilwell Varco, L.P. | Reinforced stators and fabrication methods |
US8944789B2 (en) | 2010-12-10 | 2015-02-03 | National Oilwell Varco, L.P. | Enhanced elastomeric stator insert via reinforcing agent distribution and orientation |
GB2551304B (en) | 2012-02-22 | 2018-02-28 | Nat Oilwell Varco Lp | Stator for progressive cavity pump/motor |
DE102012112044B4 (en) * | 2012-05-04 | 2015-10-08 | Netzsch Pumpen & Systeme Gmbh | Self-fixing stator housing |
DE102012012076A1 (en) | 2012-06-13 | 2013-12-19 | Arnold Jäger Holding GmbH | Stator of cavity pump used in food industry, has perforated plate pipe arranged between outer side of stator main portion and inner side of rotor space and made of rubber to surround sides of stator main portion |
RU2516094C2 (en) * | 2012-08-06 | 2014-05-20 | Открытое акционерное общество Научно-производственное объединение "Искра" | Helical rotor pump |
WO2014138068A1 (en) * | 2013-03-05 | 2014-09-12 | Schlumberger Canada Limited | Method and apparatus to manufacture a progressive cavity motor or pump |
US9541225B2 (en) | 2013-05-09 | 2017-01-10 | Titeflex Corporation | Bushings, sealing devices, tubing, and methods of installing tubing |
AU2015219099B2 (en) | 2014-02-18 | 2018-08-02 | Reme Technologies, Llc | Graphene enhanced elastomeric stator |
JP2017506308A (en) | 2014-02-18 | 2017-03-02 | バート ローターズ ユーケー リミテッドVert Rotors Uk Limited | Positive displacement rotary machine |
CN106685152B (en) * | 2015-11-10 | 2019-03-12 | 耐驰(兰州)泵业有限公司 | Manufacture for eccentrie helical totorpump can hydraulic adjustment stator method |
RU2646664C1 (en) * | 2017-06-22 | 2018-03-06 | Михаил Валерьевич Шардаков | Stainer of screw hydraulic, device and method of its inner eye casing manufacture |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2250263C3 (en) | 1972-10-13 | 1978-09-28 | Gummi-Jaeger Kg Gmbh & Cie, 3000 Hannover | Adjustable stator for eccentric screw pumps |
DE2541779A1 (en) * | 1975-09-19 | 1977-03-31 | Allweiler Ag | Stator with prefabricated lining for eccentric screw pump - preventing internal stress due to shrinkage of resilient material |
US4313717A (en) * | 1979-10-04 | 1982-02-02 | Kopecky Eugene F | Adjustable pressure extrusion pump |
DE3119568A1 (en) * | 1981-05-16 | 1982-12-02 | Big Dutchman (International) AG, 8090 Wezep | Eccentric worm screw pump |
DE3322095A1 (en) * | 1983-06-20 | 1984-12-20 | Gummi-Jäger KG GmbH & Cie, 3000 Hannover | Stator for excentric worm screw pumps |
JPS61180512A (en) * | 1986-01-21 | 1986-08-13 | 日立電線株式会社 | Construction of directly cooled type power cable line |
US5171138A (en) * | 1990-12-20 | 1992-12-15 | Drilex Systems, Inc. | Composite stator construction for downhole drilling motors |
DE4134853C1 (en) * | 1991-05-22 | 1992-11-12 | Netzsch-Mohnopumpen Gmbh, 8264 Waldkraiburg, De | |
US5171139A (en) * | 1991-11-26 | 1992-12-15 | Smith International, Inc. | Moineau motor with conduits through the stator |
DE4403598A1 (en) * | 1994-02-07 | 1995-08-10 | Arnold Jaeger | Eccentric screw pump for supplying mortar |
DE19801020A1 (en) * | 1998-01-14 | 1999-07-22 | Artemis Kautschuk Kunststoff | Elastomer stator for an eccentric worm pump |
DE19842754C2 (en) | 1998-09-18 | 2001-04-26 | Seepex Seeberger Gmbh & Co | Eccentric screw pump |
-
2003
- 2003-11-17 US US10/725,967 patent/US7316548B2/en not_active Expired - Fee Related
-
2004
- 2004-07-08 CA CA2473282A patent/CA2473282C/en not_active Expired - Fee Related
- 2004-11-17 BR BRPI0416634-5A patent/BRPI0416634A/en not_active Application Discontinuation
- 2004-11-17 WO PCT/EP2004/013029 patent/WO2005047701A2/en active Application Filing
- 2004-11-17 EP EP04803161.1A patent/EP1733147B1/en not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO2005047701A2 * |
Also Published As
Publication number | Publication date |
---|---|
CA2473282A1 (en) | 2005-05-17 |
US20050106004A1 (en) | 2005-05-19 |
CA2473282C (en) | 2010-04-13 |
BRPI0416634A (en) | 2007-01-16 |
US7316548B2 (en) | 2008-01-08 |
WO2005047701A3 (en) | 2005-07-07 |
WO2005047701A2 (en) | 2005-05-26 |
EP1733147B1 (en) | 2016-12-28 |
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