EP2249037A2 - Procédé de fabrication d'un segment de stator de pompe à vis excentrique à stator segmenté - Google Patents

Procédé de fabrication d'un segment de stator de pompe à vis excentrique à stator segmenté Download PDF

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Publication number
EP2249037A2
EP2249037A2 EP10004334A EP10004334A EP2249037A2 EP 2249037 A2 EP2249037 A2 EP 2249037A2 EP 10004334 A EP10004334 A EP 10004334A EP 10004334 A EP10004334 A EP 10004334A EP 2249037 A2 EP2249037 A2 EP 2249037A2
Authority
EP
European Patent Office
Prior art keywords
stator
segment
cutting means
helical
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.)
Withdrawn
Application number
EP10004334A
Other languages
German (de)
English (en)
Inventor
Sebastian Jäger
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 EP2249037A2 publication Critical patent/EP2249037A2/fr
Withdrawn legal-status Critical Current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
    • F04C2/08—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
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • 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
    • F04C2240/00—Components
    • F04C2240/70—Use of multiplicity of similar components; Modular construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type

Definitions

  • the invention relates to a method for producing a stator segment for a segmented stator of an eccentric screw pump or an eccentric screw motor, a stator segment and a stator.
  • Eccentric screw pumps and eccentric screw motors which operate according to the Moineau principle are known in principle.
  • Such pumps and motors usually comprise a stator and a rotor arranged in the interior of the stator.
  • the stator comprises a stator tube made of a relatively hard material and an elastomeric lining connected to the inner surface of the stator tube.
  • the lining is shaped in the manner of a multi-start, helical, steep thread and forms a cavity in which the rigid rotor, which is likewise shaped in the manner of a helical coarse thread, is accommodated, the rotor having one less gear than the stator.
  • a stator for an eccentric screw pump or an eccentric screw motor which operate according to the Moineau principle discloses the US 7396220 B2 ,
  • the stator comprises a plurality of stator segments arranged axially one behind the other.
  • Each stator segment has a helical segment inner surface, wherein in the assembled state the individual segment inner surfaces of the stator segments complement one another to form a helical stator inner surface.
  • the stator additionally comprises a lining made of an elastomer, which comprises the stator inner surface which is composed of the individual helical segment inner surfaces Layer thickness covered.
  • the stator segments are connected in a material-locking manner to an outer tube surrounding the stator segments.
  • stator segments The alignment of the stator segments with each other is ensured by pins which engage positively to prevent rotation of adjacent stator segments each in two adjacent stator segments.
  • An alternative to fixing the individual stator segments provides that one or more grooves extending in the axial direction are formed in an outer tube surrounding the stator segments, in which the stator segments engage with projections in a form-fitting manner.
  • a movement of the stator segments in the axial direction is secured by a front and rear screw.
  • the individual stator segments are produced by a casting process.
  • the material used is aluminum.
  • a stator segment preferably has an axial extent of 150 to 600 mm.
  • a disadvantage of the production of a stator segment by a casting method is that a new casting mold is necessary for each stator segment with a changed segment inner surface.
  • the object of the present invention is to propose a variable method for producing a stator segment for a segmented stator of an eccentric screw pump or an eccentric screw motor, as well as a stator segment and a stator.
  • a stator segment which is in an initial state is machined by means of a material-removing linear cutting means for producing a helical segment inner surface.
  • the removal of the material by the cutting means can be done, for example, exciting, abrasive or evaporating.
  • a linear cutting means is preferably a jet, for example, a water jet, a laser beam or a plasma jet, or a wire, for example, a fuse wire or a spark erosion wire used.
  • helical preferably also includes surfaces approximating a helical shape.
  • the alignment and the method of the cutting means is provided in an advantageous development such that the cutting means enters at a first outer edge of the helical segment inner surface to be produced and exits a second outer edge of the helical segment inner surface to be produced, the course of the cutting means of the helical segment inner surface to be produced, which is enclosed by the first outer edge and the second outer edge follows.
  • the cutting means in this way along two closed lines, the first Outer edge and the second outer edge, proceed and thereby, if necessary, rotated and pivoted. A discontinuation of the cutting means is not necessary.
  • stator segments produced in this way can be joined together to form a stator.
  • the stator can be designed, for example, as a stator of an eccentric screw pump or an eccentric screw motor, which operate according to the Moineau principle.
  • the helical inner surface of the stator composed of the individual segment inner surfaces of the stator segments is preferably covered with a lining of an elastomer, for example a rubber having a substantially uniform layer thickness.
  • FIG. 1 1 shows an embodiment of a stator segment 1 according to the invention for a segmented stator of an eccentric screw pump or an eccentric screw motor.
  • the stator segment 1 is disc-shaped. It comprises a planar first base 6 oriented perpendicularly to a central axis 10 and a planar second aligned parallel to the first base 6 Base surface 7. Between the base surfaces 6, 7 there is a cylindrical lateral surface 8. The axial extent of the stator segment 1 is at most 100 mm.
  • the stator segment 1 is made of metal, in this case made of aluminum. Alternatively, the stator segment 1, for example, also made of ceramic or a crosslinked or thermoplastic polymer.
  • the stator segment 1 has a helical segment inner surface 2 surrounding the axis 10.
  • the helical segment inner surface 2 is bounded by a first closed outer edge 3 and a second closed outer edge 4.
  • the first outer edge 3 is inner edge of the first base 6, the second outer edge 4 inner edge of the second base 7.
  • the segment inner surface 2 is formed such that it can be assembled from the first outer edge 3 to the second outer edge 4 extending straight line 5.
  • a plurality of such lines 5 is shown by way of example.
  • the helical segment inner surface 2 approximates an ideal helix shape.
  • the deviation from the ideal shape due to the approach of straight lines extending from the first outer edge 3 to the second outer edge 4 depends in particular on the axial extent of the stator segment 1. By reducing the axial extent, the approach to the ideal helix shape can be improved.
  • a stator segment which is in an initial state is processed by means of a material-removing beam for generating the helical segment inner surface 2.
  • the stator segment which is not shown in the starting state, is a disk-shaped solid material having a flat first base surface and a second plane plane-parallel to the first base surface Base surface, as well as between the first base surface and the second base surface lying cylindrical lateral surface 8.
  • the axial extent of the stator located in the initial state segment corresponds to the axial extent of the machined stator segment.
  • stator in the initial state instead of a solid material, for example, have a hole or a hole.
  • a segment inner piece with an inner piece outer surface complementary to the helical segment inner surface 2 is cut out of the stator segment in the initial state.
  • the segment inner piece (not shown) is removed from the processed stator segment 1, for example by unscrewing or alternative measures known per se.
  • the beam is aligned and moved such that the beam penetrates into the material on the first outer edge 3 of the helical segment inner surface 2 to be produced and leaves the material on the second outer edge 4 bounding the helical segment inner surface 2, the beam path of the generating helical segment inner surface 2 follows.
  • the in the Fig. 1 In principle, it is possible in this way, exclusively by moving the beam along the first outer edge 3 and the second outer edge 4, the helical segment inner surface 2 form, which is preferred according to the invention.
  • the jet does not have to be discontinued in this case. Furthermore, the mass of the material to be removed for cutting out the inner segment piece is minimized.
  • a beam for removing the material as punctiform as possible water jet is used, to which an abrasive is added.
  • Alternative blasting methods are also possible, for example a laser beam method or plasma cutting method.
  • several beams can be used in parallel.
  • the control of such a jet is carried out as follows:
  • the aim is to produce a segment inner surface 2 which can be described by a helical screwing of a cross section corresponding to a hypocycloid or preferably an epihypocycloid.
  • the beam is moved along the hypocycloid-shaped cross-sectional contour over the outer edge 3.
  • a different beam direction vector can be assigned to each point on the segment inner surface 2 to be generated, and in this way the ideal helical shape can be approximated.
  • the beam is preferably linearly moved both along two mutually linearly independent axes which lie in a plane oriented perpendicular to the axis 10 and rotated or pivoted about two axes of rotation perpendicular to one another in this plane.
  • the control is preferably carried out automatically and computer-assisted.
  • a linearly tensioned wire for example a spark erosion wire or a fusible wire
  • the machining of the stator segment 1 for producing the segment inner surface 2 by means of spark erosion is suitable, for example, in the case of a stator segment 1 made of metal, by means of melting, for example, in the case of a stator segment 1 made of plastic.
  • the Fig. 2 shows a longitudinal section through a portion of an embodiment of a segmented stator 20 according to the invention.
  • the stator 20 comprises a plurality of stator segments 21 a, 21 b, which are arranged along the axis 10 axially one behind the other to form a helical stator inner surface 23.
  • a single stator segment 21 a, 21 b is basically like that in Fig. 1 illustrated stator segment 1 is formed.
  • the segment inner surface 2 varies from stator segment to stator segment in order to complement the helical stator inner surface 23.
  • the stator 20 comprises an outer tube 24.
  • the stator 21 a, 21 b are disposed within the outer tube 24 and relative to a movement in the axial direction and against the execution of a rotary motion relative secured to adjacent stator segments, for example by material or positive connection.
  • Such measures are known per se. In this regard, the disclosure of the US 7396220 B2 directed.
  • a fixation of the stator 21 a, 21 b by compression of the outer tube 24 is possible.
  • the outer tube 24 is radially compressed until a sufficient fixation of the stator 21 a, 21 b is given.
  • the stator 20 additionally comprises a lining 25 made of an elastomer, here a rubber, which is supported by the individual stator segments 21 a, 21 b formed helical Statorinnen Chemistry 23 is applied.
  • the liner 25 has a substantially uniform thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP10004334A 2009-05-05 2010-04-23 Procédé de fabrication d'un segment de stator de pompe à vis excentrique à stator segmenté Withdrawn EP2249037A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/435,838 US20100284842A1 (en) 2009-05-05 2009-05-05 Method of producing a stator segment for a segmented stator of an eccentric screw pump

Publications (1)

Publication Number Publication Date
EP2249037A2 true EP2249037A2 (fr) 2010-11-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10004334A Withdrawn EP2249037A2 (fr) 2009-05-05 2010-04-23 Procédé de fabrication d'un segment de stator de pompe à vis excentrique à stator segmenté

Country Status (3)

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US (1) US20100284842A1 (fr)
EP (1) EP2249037A2 (fr)
CA (1) CA2703059A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016100894U1 (de) 2016-02-19 2016-03-02 Artemis Kautschuk- Und Kunststoff-Technik Gmbh Stator und/oder Rotor einer Exzenterschneckenpumpe oder eines Exzenterschneckenmotors

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102139440B (zh) * 2011-04-13 2013-01-23 时敬龙 稠油热采用全金属螺杆泵定子的加工方法
US8967985B2 (en) * 2012-11-13 2015-03-03 Roper Pump Company Metal disk stacked stator with circular rigid support rings
US9133841B2 (en) * 2013-04-11 2015-09-15 Cameron International Corporation Progressing cavity stator with metal plates having apertures with englarged ends
US9995085B2 (en) * 2013-09-19 2018-06-12 Balthazar L. Perez Downhole motor stator and method of manufacture
US9850897B2 (en) 2013-12-30 2017-12-26 Cameron International Corporation Progressing cavity stator with gas breakout port
EP3382203B1 (fr) * 2017-03-30 2024-05-15 Roper Pump Company LLC Pompe à cavité progressive avec gaine de chauffage intégrée
CN109538112B (zh) * 2019-01-04 2023-09-08 中国地质大学（北京） 一种套装拼接式全金属螺杆定子加工方法
CN109915044B (zh) * 2019-03-22 2023-11-21 中国地质大学（北京） 一种装配式螺杆钻具金属定子轴向加工装配工艺
US20240247655A1 (en) * 2023-01-20 2024-07-25 Roper Pump Company Llc Modular stator for progressive cavity devices

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7396220B2 (en) 2005-02-11 2008-07-08 Dyna-Drill Technologies, Inc. Progressing cavity stator including at least one cast longitudinal section

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5832604A (en) * 1995-09-08 1998-11-10 Hydro-Drill, Inc. Method of manufacturing segmented stators for helical gear pumps and motors
US7150101B2 (en) * 2003-12-15 2006-12-19 General Electric Company Apparatus for fabricating components
US7941906B2 (en) * 2007-12-31 2011-05-17 Schlumberger Technology Corporation Progressive cavity apparatus with transducer and methods of forming and use
US20090320285A1 (en) * 2008-06-30 2009-12-31 Tahany Ibrahim El-Wardany Edm machining and method to manufacture a curved rotor blade retention slot

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7396220B2 (en) 2005-02-11 2008-07-08 Dyna-Drill Technologies, Inc. Progressing cavity stator including at least one cast longitudinal section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016100894U1 (de) 2016-02-19 2016-03-02 Artemis Kautschuk- Und Kunststoff-Technik Gmbh Stator und/oder Rotor einer Exzenterschneckenpumpe oder eines Exzenterschneckenmotors

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US20100284842A1 (en) 2010-11-11
CA2703059A1 (fr) 2010-11-05

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