EP2994640A1 - Stator de pompe d'alimentation - Google Patents

Stator de pompe d'alimentation

Info

Publication number
EP2994640A1
EP2994640A1 EP14716317.4A EP14716317A EP2994640A1 EP 2994640 A1 EP2994640 A1 EP 2994640A1 EP 14716317 A EP14716317 A EP 14716317A EP 2994640 A1 EP2994640 A1 EP 2994640A1
Authority
EP
European Patent Office
Prior art keywords
stator
stator body
rotor
helical
thread insert
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
Application number
EP14716317.4A
Other languages
German (de)
English (en)
Other versions
EP2994640B1 (fr
Inventor
Korbinian EISNER
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.)
SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
Original Assignee
SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
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 SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG filed Critical SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
Publication of EP2994640A1 publication Critical patent/EP2994640A1/fr
Application granted granted Critical
Publication of EP2994640B1 publication Critical patent/EP2994640B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines 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
    • F01C1/101—Moineau-type
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/10—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/107—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/1075—Rotary-piston pumps specially adapted for elastic fluids 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 material, e.g. Moineau type
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced

Definitions

  • the present invention relates to a stator for a feed pump, in particular for a progressing cavity pump, wherein the stator has a stator body which has a receiving opening formed for receiving a rotor.
  • the stator disclosed in this document comprises a stator body made of a shell in the form of a smooth-cylindrical tube made of steel and a lining made of rubber or a rubber-like plastic.
  • the jacket of the stator body encloses the lining or the lining adheres firmly to an inner wall of the jacket of the stator body.
  • An inside of the lining defines an axially continuous cavity.
  • the document DE 10 2006 021 897 A1 discloses a stator jacket with an elastic lining, the stator jacket having longitudinal grooves on the inside. The ends of the stator jacket enter into a positive connection with a sealing strip to secure the stator jacket against expansion during pumping.
  • stator for an eccentric screw pump the stator body of which is formed from a hollow-cylindrical casing of metal and an elastomer core, which is connected by vulcanization to an inner circumferential surface of the hollow cylindrical casing.
  • Stators are also known from the prior art which have a helical stator body.
  • a stator is disclosed for example in the document DE 198 04 259 AI.
  • the stator according to this document essentially consists of a rigid shell made of steel and a liner of rubber or a rubber-like plastic enclosed by the shell.
  • the liner is firmly adhered to the jacket, ie it rests against the inside of the jacket.
  • the liner has a continuous cavity for receiving a rotor.
  • the jacket has inside and outside on the contour and shape of the cavity and is therefore also coiled.
  • the preparation of the stators known from the prior art usually follows the scheme disclosed in DE 10 2010 000 923 A1.
  • the jacket of the stator body with the required dimensions is first cut to length from a metal tube or a steel tube. Subsequently, the jacket of the stator body is chemically and / or mechanically coarse and then finely cleaned of dirt and roughened to increase the adhesion between the shell and the lining of rubber or a rubber-like plastic. Further, the sheath must be pretreated (chemically) at the joint with the rubber so that a compound can be made with the rubber.
  • a preheated, helical core is inserted to produce the helical or helical opening. Thereafter, the ends of the shell are closed with lids, and injected a rubber mixture. A connection between the shell and the rubber lining for the formation of the stator body takes place by vulcanization of the rubber lining.
  • stator for a feed pump of the type described in which the stator is formed as an at least partially reinforced with a thread insert elastomer body.
  • stator body in the form of an at least partially reinforced with a thread insert elastomer body can be completely dispensed with a metal tube or on a solid and non-detachable connection with a metal tube in the manufacture of the stator for a feed pump.
  • the costs necessary for obtaining and processing the metal tube and its pretreatment, as well as the time required in this connection can be saved in the production of the stator or the stator body, ie the production costs can be reduced to a considerable extent with the stator according to the invention
  • the stator body according to the invention can be completely recycled, because there are no indissoluble connections with metal parts received as is common in the prior art.
  • stator according to the invention in use of a feed pump, such as e.g. an eccentric screw pump, higher torques can be absorbed by the stator body formed from a reinforced with a thread insert reinforced elastomer body, as is the case with the stators known from the prior art.
  • the helical rotor extending through the opening in the stator comes into contact with the elastomer core of the stator. Since the prior art rubber liner is vulcanized to the metal pipe, the joint between the rubber liner and the metal pipe is a weak point of the stators known in the art. With too high a torque applied to the rubber liner, in the prior art The technique of tearing the rubber lining at the junction with the metal tube from this.
  • stator according to the invention there is no junction between the rubber and a metal pipe, as the stator body is formed wholly and exclusively of an elastomeric body, in which at least one thread ⁇ insert is partially embedded.
  • the stator body of the stator according to the invention can move in the radial and also axial direction, since there is no connection to a metal tube.
  • the stator body may be helical or helical.
  • the receiving opening in the stator body may helically extend therethrough along the longitudinal axis of the stator body.
  • two or more separate delivery chambers are formed by the interaction of the rotor with the stator or by the eccentric rotational movement of the rotor in the stator, which allow a continuous delivery of the conveyed.
  • the thread insert can preferably extend in the longitudinal direction through the stator body. As already mentioned, the thread insert can be embedded in the elastomer body or enclosed by the elastomer body.
  • the thread insert can extend according to an embodiment of the invention in the form of a winding about the longitudinal axis of the stator in the elastomer body.
  • the winding of the thread insert may preferably consist of several layers.
  • the individual layers of the winding can be wound crosswise.
  • a thread insert are generally different thread windings and fabric windings conceivable.
  • single-layer or multi-layer fabric layers, fabric tapes or the like can be used.
  • the production of the stator can be further simplified and accelerated because they can be wound quickly and easily on the production of a first elastomer layer during manufacture.
  • supporting elements can be provided on the stator body on its outer circumferential surface distributed over its longitudinal extent.
  • the support elements may be formed and arranged on the elastomer body in such a way that they buckle or buckle and a
  • the stator may have at least one tie rod which is connected to the end pieces at the axial ends of the stator body.
  • the at least one tie rod is used to prevent rotation of the stator body
  • Stator body arranged so that the stator body during operation of the pump is not rotated by the rotation of the rotor or not rotated with the rotor.
  • tie rods are provided on stators or feed pumps, as in such pumps by the media to be conveyed, which can often be viscous, eccentric screw pumps, highly viscous or abrasive, during the conveying process, a relatively high pressure on the axial end surfaces of the stator or the Stator body is exercised so that the tie rods prevent deformation on the stator or on the stator subsequent components.
  • the support elements provided on the outer peripheral surface of the stator body can be supported on the at least one tie rod and thus prevent twisting and buckling or buckling of the stator body during operation of a delivery pump.
  • the support Elements may be formed in the form of projections on the outer peripheral surface of the stator body and protrude in the direction of the tie rods.
  • the support elements attach themselves to the tie rods for support with a contact section formed on them.
  • the tie rods can cooperate with the support elements and their contact sections for preventing rotation of the stator body and hold the stator in such a predetermined position.
  • the support elements can therefore serve as anti-rotation. Due to the anti-rotation device achieved by the support elements, the prestressing force of the tie rods can be reduced or the pretensioning force can be reduced to the axial sealing force required in the application. Since the tie rods also have to produce no or only a smaller axial biasing force due to the thread insert of the stator body, the stator can be tuned to certain pumps and certain applications on the positioning and dimensioning of the tie rods and / or the support elements, which among other things, the performance of such Pumps can be increased.
  • the end pieces of the stator can preferably be designed such that the axial ends of the stator body formed in the form of an elastomer body reinforced with a thread insert are clamped by means of the end pieces.
  • the stator body has a mounting portion and a receiving portion comprising the receiving opening, wherein the mounting portion radially surrounds the receiving portion at least in sections.
  • This type of stator is preferably used in pumps or feed pumps, which have a rigidly mounted rotor.
  • the eccentric movement for generating the pumping chambers must be generated in such pumps via the stator, because the helical rotor is indeed rotatable, but not deflected in the radial direction to produce an eccentric movement.
  • the eccentric movement necessary for pumping operation is achieved in such a pump by the receiving portion of the stator body, which is deflected during operation by the rotating, helical rotor and can thus perform an eccentric movement.
  • the deflectable receiving portion two delivery chambers between the rotor and the receiving portion or between their corresponding helical contours are formed ren to promote the medium to be conveyed through the stator.
  • the holding portion and the receiving portion may be connected to one another via an angled portion extending to the longitudinal axis.
  • the holding portion and the receiving portion may extend in the direction of the longitudinal axis.
  • a first end of the stator body can be clamped via end pieces of the stator.
  • the second end of the stator body may lie radially inwardly of the first end.
  • the two ends of the stator body can lie here, for example, in a plane extending substantially perpendicular to the longitudinal axis.
  • the receiving portion may be provided according to this embodiment with a helical contour.
  • the present invention further relates to a feed pump with a stator according to the type described above.
  • the present invention also relates to an eccentric screw pump having a stator as described above.
  • Fig. 1 is a perspective view of a stator according to a first embodiment of the invention
  • FIG. 2 is a front view of the stator of FIG. 1; FIG.
  • Fig. 3 is a side view of the stator according to Figures 1 and 2;
  • Fig. 4 is a sectional view taken along section line II-II of Fig. 2;
  • Fig. 5 is a sectional view taken along section line III-III of FIG. 3;
  • Fig. 6 is a detailed view of the portion V of Fig. 5; and
  • Fig. 7 is a sectional view of a stator according to a second embodiment of the invention.
  • FIG. 1 is a perspective view of a stator for a feed pump, indicated generally at 10.
  • the stator 10 has end pieces 12 and 14, which are connected to each other via tie rods 16 (three tie rods shown in FIG. 1). Between the end pieces 12 and 14 extends the stator body 18, which is in the form of an at least partially with a thread insert (not shown) reinforced elastomer body 20 is formed.
  • the end pieces 12 and 14 are formed in several parts as shown in FIG. 1, which will be discussed in more detail below.
  • an opening 22 can be seen, through which an end portion 24 of a rotor 26 extends.
  • the rotor 26 With the end portion 24, the rotor 26 with a drive means (not shown), which may for example consist of a motor and a propeller shaft, be connected.
  • the rotor 26 performs in operation with a feed pump perform an eccentric and rotational movement.
  • a propeller shaft for connecting a motor to the rotor 26 may, for example, have two kadan joints.
  • the connection between the motor and rotor 26 can be made via a flexible bending rod.
  • FIG. 1 also shows support elements 28 on the elastomer body 20 or stator body 18, which are arranged distributed on the outer circumferential surface 30 of the stator body 18 around and in the direction of the longitudinal axis L.
  • the rotor body 18 is helical or helical in shape, wherein the support elements 28 are provided on the outer periphery of the helix or helical shape.
  • the support elements 28 are based on the tie rods 16 or lie against the tie rods 16 at.
  • the support elements 28 have for this purpose a concave contact portion 32. Due to the installation of the support elements 28 on the tie rods 16, a bulging or buckling of the stator body 18 due to the medium to be conveyed is produced during operation of a delivery pump provided with the stator 10 exerted pressure prevented. In other words, the pressure exerted by the medium to be conveyed on the elastomer body 20 of the stator body 18 is transmitted via the support elements 28 to the tie rods 16 with deformation of the support elements 28.
  • the end pieces 12 and 14 are formed in several parts and have tail portions 12a, 12b and 14a, 14b.
  • the end piece parts 12a and 12b are, as shown in Fig. 1, connected via fastening means in the form of screws 34 with each other. The same applies to the end piece parts 14a, 14b, which is hinted at in Fig. 1.
  • FIG. 2 shows a front view of the stator 10.
  • FIG. 2 shows the end piece parts 12a and 12b of the end piece 12 as well as the end piece parts 14a and 14b of the end piece 14 which, like the end piece parts 12a and 12b, are connected to one another via screws 34.
  • FIG. 2 shows the helix shape or helical shape of the stator body 18, the support elements 28 being arranged distributed over the radius of the helix shape of the stator body 18 in the longitudinal direction.
  • the support elements 28 are each supported on the extending between the end pieces 12 and 14 tie rods 16.
  • FIG. 3 shows a side view of the stator 10.
  • FIG. 3 shows the end piece 14 or the pot-shaped end piece part 14b and the opening 22 formed therein.
  • the rotor 26 is received in a receiving opening 36 or in a recess 36 in the stator body 18.
  • the entrance of the aperture 36 in the stator body 18 and elastomeric body 20, respectively, extends longitudinally transversely of the longitudinal axis to assist in the eccentric movement of the rotor 26.
  • FIG. 4 shows a sectional view along the section line II-II from FIG. 2.
  • the end piece 12 and the end piece part 12b are the screws 34 which connect the end piece parts 12a and 12b ( Figure 2) and the rotor 26 which extends through the opening 36.
  • the support elements 28 attach themselves to the tie rods 16 via their abutment sections 32.
  • the thread insert 38 can be seen for the first time, which is embedded in the elastomer body 20 of the stator body 18 in order to reinforce the elastomer body 20.
  • FIG. 5 shows a sectional view along the section line III-III from FIG. 3.
  • stator body 18 The axial ends of the stator body 18 are respectively clamped by the tail portions 12a and 12b and 14a and 14b, respectively, to fix the stator body 18 to the end pieces 12 and 14 and to hold the stator body 18 together with the tie rods 16.
  • recesses 12c and 14c are provided in the end piece parts 12b and 14b, in which the axial ends of the stator body 18 are received. Via the screws 34, the axial ends of the stator body 18 are clamped between the respective end piece parts 12a, 12b and 14a, 14b.
  • the opening 36 or the recess 36 extends in the direction of the longitudinal axis L of the stator body 18 therethrough.
  • the recess 36 is also provided in its interior with a helical or helical contour.
  • the rotor 26 extends through the recess 36.
  • the rotor 26 is likewise formed helically or helically.
  • Elastomer body 20 of the stator body 18 cooperate to promote the medium to be conveyed, since by the helical shape of the stator body 18 and the rotor 26th Delivery chambers are formed, which allow a continuous and pulsation-free conveyance of the conveyed by the pump.
  • the rotor 26 can touch or deflect certain sections of the stator body 18 to form one or more delivery chamber (s) due to its spiral shape or its eccentric drive.
  • stator body 18 Since with such pumps often viscous, highly viscous and abrasive medium, such as oil, fats and sludge-like effluents are promoted, a relatively high pressure is exerted on the stator body 18 during operation of a feed pump or an eccentric pump. This pressure can be transmitted to the tie rods 16 with deformation of the support elements 28, whereby buckling or buckling and also rotation of the stator body 18 due to the pressure of the medium to be conveyed is prevented. The medium to be conveyed enters the stator body 18 at the end piece 14 (FIG.
  • the rotor 26 has an opening 40 for attachment to a propeller shaft or the like.
  • FIG. 6 shows a detailed view of the detail V from FIG. 5.
  • Elastomer body 20 of the stator 18 is included.
  • stator body 18 In the manufacture of the stator body 18, unlike the prior art, no connection must be made between the elastomer and a metal pipe.
  • the thread insert 38 In the stator body 18 according to the invention, the thread insert 38 is embedded in an elastomer body 20 and the elastomer is then vulcanized, whereby a connection between the elastomer and the thread insert is produced.
  • the stator 110 has end pieces 112 and 114.
  • an opening 142 is formed, through which the medium to be conveyed enters the stator 110.
  • a receiving opening 122 is further formed, which receives the end portion 124 of the rotor 126 and in which the end portion 124 of the rotor 126 is mounted.
  • the rotor 126 is rotatably supported in the receiving opening 122, but can not perform any eccentric movement due to the rigid mounting in the opening 122.
  • the end portion 124 of the rotor 126 is tubular, whereas the portion of the rotor 126 received in the opening 136 of the stator body 118 and the elastomer body 120, respectively, is helical.
  • the stator body 118 comprises a holding portion 146 which radially surrounds the receiving portion 144.
  • the receiving portion 144 and the holding portion 146 are connected to each other via a connecting portion 148.
  • the connecting portion 148 extends at an angle to the longitudinal axis L, whereas the receiving portion 144 and the support portion 146 extend in the direction of the longitudinal axis L.
  • the connecting portion forms part of the receiving opening 136 of the elastomeric body 120.
  • a first end 150 of the elastomeric body 120 is clamped between the tail portions 112a and 112b of the end piece 112.
  • the second end 152 of the elastomeric body 120 is provided radially inward of the first end 150 and is not in communication with the tail portions 112a, 112b.
  • the second end 152 and the receiving portion 144 are movable.
  • the receiving portion 144 is forced in operation by the rotating rotor 126 an eccentric movement, which is necessary for the pumping operation.
  • the elastomeric body 120 includes the suture liner 138 that extends completely through the elastomeric body 120 and is also clamped in the tailpiece portions 112a and 112b.
  • the stator 110 includes a tubular portion 154 that extends between the end pieces 114 and 112.
  • the support portion 146 of the elastomeric body 120 abuts the tubular portion 154.
  • Elastomer body 120 radially inwardly and passes into the receiving opening 136, or connects the support portion 146 with the provided with a helical or helical contour receiving portion 144.
  • the receiving portion 144 receives the rotor 126 at least in sections.
  • the stator 110 according to this embodiment is particularly designed for pumps in which the rotor 126 is rigidly arranged and performs only a rotational movement about the longitudinal axis L.
  • the rotor 126 can not perform an eccentric movement.
  • the eccentric movement necessary for pumping operation is achieved in such a pump by the receiving portion 144 of the stator body 118, which is deflected during operation by the rotating, helical rotor 126 and can thus perform an eccentric movement.
  • the eccentric movement of the deflectable receiving portion 144 is also possible due to the movable end 152 which is not attached to the stator 110 and the end piece 112, respectively.
  • the deflectable receiving portion 144 two delivery chambers between the rotor 126 and the receiving portion 144 or between the corresponding helical contours are formed to promote the medium to be conveyed through the stator 110.
  • the eccentric movement necessary for the pumping operation is achieved in such pumps by the rotational movement of the rotor 126 and the deflection of the receiving portion 144 of the elastomeric body 120 relative to the longitudinal axis L.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention concerne un stator (10) d'une pompe d'alimentation, en particulier d'une pompe à vis excentrique. Le stator comporte un corps de stator (18) pourvu d'une ouverture de logement (36) réalisée pour loger un rotor (24). Par ailleurs, le corps de stator (18) est réalisé sous la forme d'un corps élastomère (20) renforcé au moins sur certaines parties d'une garniture de fils (38).
EP14716317.4A 2013-05-06 2014-04-09 Stator de pompe d'alimentation Not-in-force EP2994640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013004219U DE202013004219U1 (de) 2013-05-06 2013-05-06 Stator für eine Förderpumpe
PCT/EP2014/057149 WO2014180621A1 (fr) 2013-05-06 2014-04-09 Stator de pompe d'alimentation

Publications (2)

Publication Number Publication Date
EP2994640A1 true EP2994640A1 (fr) 2016-03-16
EP2994640B1 EP2994640B1 (fr) 2018-03-14

Family

ID=48652899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14716317.4A Not-in-force EP2994640B1 (fr) 2013-05-06 2014-04-09 Stator de pompe d'alimentation

Country Status (5)

Country Link
US (1) US10113426B2 (fr)
EP (1) EP2994640B1 (fr)
CN (1) CN105358833B (fr)
DE (2) DE202013004219U1 (fr)
WO (1) WO2014180621A1 (fr)

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ITTO20130129U1 (it) * 2013-08-12 2013-11-11 Stan Engineering Corp S R L Pompa volumetrica a cavità progressive perfezionata.
CN104405631B (zh) * 2014-09-30 2016-06-01 余雷 一种能够深层取水的泵头
EP3473856B1 (fr) * 2017-10-20 2020-12-30 Circor Pumps North America, Llc. Dispositif de démontage pour pompes à cavité progressive
US11268385B2 (en) * 2019-10-07 2022-03-08 Nov Canada Ulc Hybrid core progressive cavity pump
EP3825552A1 (fr) * 2019-11-22 2021-05-26 Grundfos Holding A/S Pompe à vis excentrique
DE102020004334A1 (de) 2020-07-20 2022-01-20 Wilhelm Kächele GmbH Stator für Exzenterschneckenmaschine
US11813580B2 (en) 2020-09-02 2023-11-14 Nov Canada Ulc Static mixer suitable for additive manufacturing
DE102021130260A1 (de) 2021-11-19 2023-05-25 Wilhelm Kächele GmbH Stator für Exenterschneckenmaschine sowie Herstellungsverfahren für diesen

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Also Published As

Publication number Publication date
CN105358833B (zh) 2018-04-03
US10113426B2 (en) 2018-10-30
DE112014002291A5 (de) 2016-02-18
US20160084085A1 (en) 2016-03-24
DE202013004219U1 (de) 2013-05-17
WO2014180621A1 (fr) 2014-11-13
CN105358833A (zh) 2016-02-24
EP2994640B1 (fr) 2018-03-14

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