EP0448941B1 - Stator pour une pompe excentrique à vis - Google Patents

Stator pour une pompe excentrique à vis Download PDF

Info

Publication number
EP0448941B1
EP0448941B1 EP91101831A EP91101831A EP0448941B1 EP 0448941 B1 EP0448941 B1 EP 0448941B1 EP 91101831 A EP91101831 A EP 91101831A EP 91101831 A EP91101831 A EP 91101831A EP 0448941 B1 EP0448941 B1 EP 0448941B1
Authority
EP
European Patent Office
Prior art keywords
stator
thread
sleeve
profile
rubber
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.)
Expired - Lifetime
Application number
EP91101831A
Other languages
German (de)
English (en)
Other versions
EP0448941A2 (fr
EP0448941A3 (en
Inventor
Heinz Gruber
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.)
GD-ANKER GRUBER-DUEBEL-ANKER GMBH
Original Assignee
Gd-Anker Gruber-Duebel-Anker 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 Gd-Anker Gruber-Duebel-Anker GmbH filed Critical Gd-Anker Gruber-Duebel-Anker GmbH
Publication of EP0448941A2 publication Critical patent/EP0448941A2/fr
Publication of EP0448941A3 publication Critical patent/EP0448941A3/de
Application granted granted Critical
Publication of EP0448941B1 publication Critical patent/EP0448941B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 stators for eccentric screw pumps according to the preamble of claim 1.
  • Eccentric screw pumps are known in manifold forms and serve to convey, for example, solid-liquid mixtures such as mortar, sludge or the like. They consist of a stator, which on the inside carries a thread-like profile made of a rubber-elastic material, in which a rotor made of steel, which also has a thread-like profile on the outside, rotates eccentrically. Between the threaded profiles of the stator and rotor, mutually sealed conveying spaces for the medium to be conveyed are formed, which are moved during the rotation of the rotor in the conveying direction during this movement not their volume, but their shape and location are constantly changing.
  • the pressures or delivery heights achievable on the outlet side depend essentially on the quality of the seal between the named delivery rooms and thus, inter alia, on the rigidity or dimensional stability of the rubber profile of the stator.
  • the latter is usually set via a certain preload, ie diameter difference between the rotor and the stator.
  • a comparatively soft rubber material in the stator profile is considered to be more wear-resistant than a relatively harder one - the former, however, requires much higher preloads to achieve the same initial pressures, so that after rubber is considered an incompressible material, comparatively strong deformations of the stator profile would result.
  • Stators for eccentric screw pumps usually consist of a cylindrical metallic jacket into which an insert made of a rubber material is introduced by means of a spraying process which, on the inside, for example, has the shape of a two-start thread profile intended for cooperation with the rotor.
  • the expected shrinkage in rubber materials depends on the respective wall thickness of the profile, so that with a view to achieving low manufacturing tolerances, special additional measures are required in order to maintain the stated tolerances despite the locally different wall thicknesses that can be traced back to the thread profile mentioned.
  • DE-PS 33 04 751 proposes continuously reducing the effective internal dimensions of the stator from its suction side to its pressure side, so that at a - seen in the axial direction - the same radial dimensions on the pressure side, the greatest preload is available. In this way, a reduction in the drive torque can be achieved.
  • the wall thickness-dependent FR-1 592 149 proposes an eccentric screw pump, the stator of which is characterized by a metallic jacket which is either deformed overall in the manner of a thread or at least has a thread-like profile on the inside, so that it is part of the rubber-elastic insert profile same wall thicknesses - seen over the entire length of the stator - are adjustable.
  • the shrinkage of the rubber material which can be traced back to the uniform wall thickness, considerably simplifies the manufacturing process.
  • stator length is designed to result in the aforementioned thin, uniform layer thicknesses of the rubber material, whereas the remaining remaining part of the stator is designed in the conventional sense.
  • a conventional insert part is thus arranged, which does not interact with a thread-like profile of the jacket, so that the jacket in this section is smooth-walled cylindrical.
  • the stator according to the invention is characterized by a significant saving in the relatively expensive rubber material.
  • the construction according to the invention also makes a contribution to waste disposal.
  • the small layer thicknesses of the rubber insert result in correspondingly small deformation paths, which, in conjunction with the corresponding design of the casing, results in a strong stiffening of a rubber profile even with comparatively small deformation paths, so that there is a correspondingly high resistance to pressure-side stresses.
  • FIG. 1 denotes the steel jacket of a stator, the contour of which is deformed, for example, in the manner of a two-start high-helix thread.
  • the thread profile can be created in any way.
  • the jacket 1 carries on its inside an insert part 2 made of a rubber-elastic material, which is in a preferably non-detachable connection to the inside surface of the jacket, for example vulcanized to the latter.
  • the insert 2 is dimensioned such that the entire inner surface of the jacket 1 is covered with a uniform layer thickness 3.
  • the result on the inside of the jacket 1 is a contour consisting of the rubber-elastic material in the manner of a two-start thread, which can be used as a pump stator.
  • the layer thickness 3 should be at least 5 mm with an acceptable wear of 2 mm. This comparatively small layer thickness is associated with the profiled design of the jacket 1 a number of advantageous effects.
  • the output pressure that can be achieved with eccentric screw pumps and thus their front height depends crucially on the quality of the sealing of the delivery spaces for the respective medium that form between the thread profiles of the rotor and stator.
  • This seal is usually produced by a certain pre-tension between the rotor made of steel and the rubber-elastic material of the stator windings and results in a certain deformation of the stator profile in the area of the seals of the mentioned delivery spaces. The purpose of this deformation is to increase the resistance to deformation due to the stresses that occur on the pressure side.
  • Fig. 2 shows a stator with a smooth cylindrical jacket 4, which in turn consists of steel and serves to receive an insert 5 made of a rubber-elastic material.
  • At 6 is a system of turns Designated from steel wires, which are adapted to the shape of the turns of the insert 5, thus for example form the shape of a two-start high-helix thread and which are welded to the jacket 4 at one or both ends, as indicated at points 7.
  • the turns 6 are completely embedded in the rubber-elastic material, in such a way that, based on the inside of the jacket 5, there are largely uniform layer thicknesses 8 of the rubber material.
  • the windings 6 consist of steel wires of circular cross section.
  • the cross-sectional shape of the steel wires can of course also be adapted to the cross-sectional shape of the individual threads of the thread profile in order to further even out the layer thickness of the rubber. It can be seen that due to the complete embedding of the turns 20 in the rubber-elastic material, corrosion problems are avoided.
  • the insert 5 is in the rest of the jacket in preferably non-detachable connection and is vulcanized, for example.
  • the advantages resulting from the uniform or approximately uniform layer thickness of the rubber material correspond to those of the exemplary embodiment according to FIG. 1, so that reference is made to the statements made there.
  • Fig. 3 shows a further embodiment of a pump stator, consisting of a smooth cylindrical jacket 4 and an insert part 9 consisting of a rubber-elastic material, which can be divided into two sections, namely a first section, with a system of windings 10 consisting of steel wire is provided and a second section that shows no windings or other reinforcements that are functionally comparable with these.
  • the ends of the turns 10 are in turn welded to the jacket 4, as indicated at points 11.
  • the connection of the insert part 9 to the jacket 4 is again carried out in the same manner as in the exemplary embodiments described above and, like in FIG. 2, the aim is to achieve a layer thickness of the rubber material that is as uniform as possible by introducing the windings 10 in this section of the stator.
  • the pre-tension is lower due to the greater layer thicknesses there and thus greater deformability of the rubber material, which is not problematic, however, since there are only slight pressure differences in this area between the individual delivery rooms and the quality of the sealing of the delivery rooms mentioned in this section only is of minor importance. Since the high compressive strength is thus restricted to the area of the stator, in which it is important with regard to the required sealing and thus the achievable delivery head, this is also the case in the operation of the Eccentric screw pump torque significantly reduced compared to such an embodiment, in which a uniform preload is set over the entire length.
  • the section of the pump stator which is equipped with steel wire reinforcements or windings in the sense of the invention can, based on the length of the entire stator, make up a portion of approximately 50%.
  • non-tensionable stators are used, so that their practical handling is very simple, in particular on the construction site.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (3)

  1. Stator pour une pompe excentrique à vis qui comprend une enveloppe métallique (1) et une pièce d'insertion (2) disposée à l'intérieur à base de matériau élastique comme le caoutchouc avec un profil de type filetage, caractérisé en ce qu'une partie côté refoulement de l'enveloppe (1) a du côté intérieur également un profil de type filetage ou est déformée globalement à la façon d'un filetage et dans cette partie de l'enveloppe (1) la pièce d'insertion (2 ) est formée par un revêtement présentant une épaisseur (3) uniforme et en ce qu'une partie côté admission de l'enveloppe (1) est conçue à l'intérieur de façon cylindrique et lisse.
  2. Stator selon la revendication 1, caractérisé en ce que la partie lisse et cylindrique représente 50 % de la longueur du stator.
  3. Stator pour une pompe excentrique à vis selon la revendication 1, caractérisé en ce que l'enveloppe (4) est conçue de façon cylindrique et lisse, en ce que la pièce d'insertion (9) est pourvue dans une partie côté refoulement d'un système de spires (10) métalliques et entièrement intégrées dans le matériau élastique comme le caoutchouc en fonction d'une épaisseur de couche régulière, dont la forme de section est adaptée à la forme de section des différents pas du profil de filetage, et en ce que le système de spires (10) est en liaison au moins partiellement avec la face interne de l'enveloppe (4).
EP91101831A 1990-03-01 1991-02-09 Stator pour une pompe excentrique à vis Expired - Lifetime EP0448941B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4006339 1990-03-01
DE4006339A DE4006339C2 (de) 1990-03-01 1990-03-01 Stator für eine Exzenterschneckenpumpe

Publications (3)

Publication Number Publication Date
EP0448941A2 EP0448941A2 (fr) 1991-10-02
EP0448941A3 EP0448941A3 (en) 1992-06-24
EP0448941B1 true EP0448941B1 (fr) 1996-05-15

Family

ID=6401145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101831A Expired - Lifetime EP0448941B1 (fr) 1990-03-01 1991-02-09 Stator pour une pompe excentrique à vis

Country Status (5)

Country Link
US (1) US5145342A (fr)
EP (1) EP0448941B1 (fr)
JP (1) JP2950629B2 (fr)
AT (1) ATE138160T1 (fr)
DE (2) DE4006339C2 (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611397A (en) * 1994-02-14 1997-03-18 Wood; Steven M. Reverse Moineau motor and centrifugal pump assembly for producing fluids from a well
US6183226B1 (en) 1986-04-24 2001-02-06 Steven M. Wood Progressive cavity motors using composite materials
GB2244517B (en) * 1990-05-31 1994-05-04 Mono Pumps Ltd Helical gear pump and stator
HU207569B (en) * 1990-12-20 1993-04-28 Drilex Syst Inc Hydraulis engine
DE4111166C2 (de) * 1991-04-06 1999-03-18 Gummi Jaeger Kg Gmbh & Cie Exzenterschneckenpumpe
US5759019A (en) * 1994-02-14 1998-06-02 Steven M. Wood Progressive cavity pumps using composite materials
US6102681A (en) * 1997-10-15 2000-08-15 Aps Technology Stator especially adapted for use in a helicoidal pump/motor
DE19754818A1 (de) * 1997-12-10 1999-06-17 Artemis Kautschuk Kunststoff Verfahren zur Herstellung von Elastomerstatoren für Exzenterschneckenpumpen
AU1928599A (en) * 1997-12-18 1999-07-05 Baker Hughes Incorporated Methods of making stators for moineau pumps
DE19821867A1 (de) * 1998-05-15 1999-11-18 Artemis Kautschuk Kunststoff Nach dem Moineau-Prinzip arbeitende Maschine, insbesondere Bohrmotor für Tiefbohrungen
US6309195B1 (en) 1998-06-05 2001-10-30 Halliburton Energy Services, Inc. Internally profiled stator tube
WO2005042910A2 (fr) * 2003-10-27 2005-05-12 Dyna-Drill Technologies, Inc. Contour asymetrique d'une chemise elastomere sur des aretes dans un stator a section de puissance type moineau
DE102004038477B3 (de) * 2004-08-07 2005-10-06 Netzsch-Mohnopumpen Gmbh Exzenterschneckenpumpe
US7214042B2 (en) * 2004-09-23 2007-05-08 Moyno, Inc. Progressing cavity pump with dual material stator
US7517202B2 (en) * 2005-01-12 2009-04-14 Smith International, Inc. Multiple elastomer layer progressing cavity stators
US7396220B2 (en) * 2005-02-11 2008-07-08 Dyna-Drill Technologies, Inc. Progressing cavity stator including at least one cast longitudinal section
CN100507274C (zh) * 2006-11-03 2009-07-01 江苏大学 电动机螺杆泵
WO2008091262A1 (fr) 2007-01-24 2008-07-31 Halliburton Energy Services, Inc. Tube stator électroformé pour appareil à cavité progressive
US7878774B2 (en) * 2007-06-05 2011-02-01 Smith International, Inc. Moineau stator including a skeletal reinforcement
US7950914B2 (en) * 2007-06-05 2011-05-31 Smith International, Inc. Braze or solder reinforced Moineau stator
US8182252B2 (en) * 2007-10-30 2012-05-22 Moyno, Inc. Progressing cavity pump with split stator
US8215014B2 (en) * 2007-10-31 2012-07-10 Moyno, Inc. Method for making a stator
US20110058930A1 (en) * 2009-09-04 2011-03-10 Robbins & Myers Energy Systems L.P. Motor/pump with spiral wound stator tube
US9393648B2 (en) 2010-03-30 2016-07-19 Smith International Inc. Undercut stator for a positive displacment motor
EP2683906A4 (fr) * 2011-03-08 2015-07-29 Services Petroliers Schlumberger Section de palier/d'engrenage destinée à un rotor/stator à modulation pdm
CN103216449A (zh) * 2012-01-18 2013-07-24 熊荣华 线性轨迹、封闭截面的管腔流体动力技术
US10527037B2 (en) 2016-04-18 2020-01-07 Baker Hughes, A Ge Company, Llc Mud motor stators and pumps and method of making
US11815092B2 (en) * 2021-01-19 2023-11-14 Musashi Engineering, Inc. Fluid transfer device, coating device comprising same, and coating method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527673A (en) * 1947-02-28 1950-10-31 Robbins & Myers Internal helical gear pump
US3139035A (en) * 1960-10-24 1964-06-30 Walter J O'connor Cavity pump mechanism
US3084631A (en) * 1962-01-17 1963-04-09 Robbins & Myers Helical gear pump with stator compression
DE1553199C3 (de) * 1966-03-15 1974-03-07 Karl Dipl.-Ing. 7024 Bernhausen Schlecht Nachstellbarer Stator für eine Exzenter-Schraubenpumpe
US3499389A (en) * 1967-04-19 1970-03-10 Seeberger Kg Worm pump
NL6815412A (fr) * 1967-11-02 1969-05-06
DE1703602A1 (de) * 1968-06-15 1972-04-20 Seeberger Kg Maschinen & Gerae Schneckenpumpe
DE2713468C3 (de) * 1977-03-26 1982-09-02 Allweiler Ag, 7760 Radolfzell Stator für Exzenterschneckenpumpen
DE3304751C2 (de) * 1983-02-11 1985-08-01 Kunststofftechnik Obernkirchen GmbH & Co KG, 3063 Obernkirchen Exzenterschneckenpumpe

Also Published As

Publication number Publication date
EP0448941A2 (fr) 1991-10-02
EP0448941A3 (en) 1992-06-24
DE59107796D1 (de) 1996-06-20
US5145342A (en) 1992-09-08
JP2950629B2 (ja) 1999-09-20
ATE138160T1 (de) 1996-06-15
DE4006339C1 (en) 1991-08-01
JPH0742679A (ja) 1995-02-10
DE4006339C2 (de) 1994-08-04

Similar Documents

Publication Publication Date Title
EP0448941B1 (fr) Stator pour une pompe excentrique à vis
DE2720130C3 (de) Meißeldirektantrieb für Tiefbohrwerkzeuge
DE2315747C3 (de) Gleitringdichtung
DE3152126C2 (de) Anordnung einer Zylinderlaufbüchse
DE10338632B4 (de) Exzenterschneckenpumpe mit erosionsfestem Rotor
DE102005028818B3 (de) Stator für eine Exzenterschneckenpumpe und Verfahren zu seiner Herstellung
EP1222396B1 (fr) Stator avec anneau frontal rigide
DE3037763A1 (de) Metallrand-oeldichtung
EP1129292B1 (fr) Vis pour une pompe a vis excentrique ou pour un moteur de forage souterrain
EP0209099B1 (fr) Stator pour pompe à vis
DE2714963B2 (de) Elastisches Rohrverbindungsstück
DE102004038477B3 (de) Exzenterschneckenpumpe
DE4111166C2 (de) Exzenterschneckenpumpe
EP0457126B1 (fr) Collecteur pour moteur ou générateur électrique
DE19638321C2 (de) Gleitringdichtung mit Stützring
DE1428244B2 (de) Schraubenverdichter mit einem Schraubenrippenrotor und einem Schraubennutenrotor
DE4312123C2 (de) Stator für Exzenterschneckenpumpen
DE4115894A1 (de) Fluegelzellenpumpe
DE3322095A1 (de) Stator fuer exzenterschneckenpumpen
EP0391182A2 (fr) Pompe à vide
EP1496257B1 (fr) Pompe à rotors à vis
DE102015218679A1 (de) Schraubenspindelpumpe
DE2161116C3 (de) Gehäuseeinsatz für Exzenterschnekkenpumpen
DE1181550B (de) Drehkolbenpumpe
DE3229446A1 (de) Pumpenstator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE FR GB LI

17P Request for examination filed

Effective date: 19911206

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE FR GB LI

17Q First examination report despatched

Effective date: 19930924

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GD-ANKER GRUBER-DUEBEL-ANKER GMBH

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB LI

REF Corresponds to:

Ref document number: 138160

Country of ref document: AT

Date of ref document: 19960615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: A. BRAUN, BRAUN, HERITIER, ESCHMANN AG PATENTANWAE

REF Corresponds to:

Ref document number: 59107796

Country of ref document: DE

Date of ref document: 19960620

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960730

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970205

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19970214

Year of fee payment: 7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980209

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20041129

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050224

Year of fee payment: 15

Ref country code: AT

Payment date: 20050224

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228