EP2018478A1 - Enveloppe de stator pour des pompes à vis sans fin excentriques - Google Patents

Enveloppe de stator pour des pompes à vis sans fin excentriques

Info

Publication number
EP2018478A1
EP2018478A1 EP07722396A EP07722396A EP2018478A1 EP 2018478 A1 EP2018478 A1 EP 2018478A1 EP 07722396 A EP07722396 A EP 07722396A EP 07722396 A EP07722396 A EP 07722396A EP 2018478 A1 EP2018478 A1 EP 2018478A1
Authority
EP
European Patent Office
Prior art keywords
stator
statormantel
jacket
grooves
lining
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
EP07722396A
Other languages
German (de)
English (en)
Other versions
EP2018478B1 (fr
Inventor
Mikael Tekneyan
Helmuth Weber
Johann Kreidl
Hisham Kamal
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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 Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Priority to SI200730945T priority Critical patent/SI2018478T1/sl
Priority to PL07722396T priority patent/PL2018478T3/pl
Publication of EP2018478A1 publication Critical patent/EP2018478A1/fr
Application granted granted Critical
Publication of EP2018478B1 publication Critical patent/EP2018478B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/20—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with dissimilar tooth forms
    • 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
    • F04C2230/70—Disassembly methods

Definitions

  • the invention relates to a stator of an eccentric screw pump which consists of a stator casing and an elastic lining which is arranged movably in the stator casing.
  • stator From DE 198 21 065 Al, this is a stator, the stator jacket and lining are designed helically. Both parts are screwed together, which should prevent twisting during pump operation. It is also apparent from this document that stator combinations in which the stator jacket has on its inside projecting strips which engage in grooves on the surface of the lining, prevent twisting of both components.
  • FIG. 4 of DE 1553126 A1 shows a polygonal lining which is surrounded by a stator jacket which is likewise polygonal.
  • the lining is not vulcanized in this example, you need for their removal from the pump casing, however, a puller.
  • DE 29 07 392 A1 discloses a design for improving the adhesive effect of the lining with the stator jacket.
  • the basically round inner surface of the stator shell has a plurality of groove-shaped recesses into which the elastic material of the lining is vulcanized. An axial mobility of the lining is thus not given.
  • the object of the invention is therefore to make the stator jacket so that the adhesion of the lining is counteracted.
  • stator lining Depending on the pressure conditions, products and materials used in an eccentric screw pump, stresses on the lining are created. Naturally, these loads may sooner or later lead to the replacement or correction of the lining.
  • the axial mobility of the stator lining in the stator jacket may be necessary for optimum adjustment of the stator dimensions.
  • a replacement of the lining or a position compensation is difficult, since the stator lining applies very strongly to the inner surface of the stator shell.
  • the resulting or induced attraction and suction forces require high opposing forces to remove the liner from the stator jacket and to keep it movable relative to him.
  • the required counterforces are virtually eliminated by reducing the adhesive forces, for which purpose grooves are made in the surface of the inside of the stator jacket.
  • the stator lining retains its axial mobility even during pump operation.
  • the grooves on the inner surface of the stator shell are parallel to its longitudinal axis. With this or with the spiral arrangement of the grooves, the adhesive effect is canceled evenly.
  • the cross section of the grooves is adapted to differently elastic material for the stator lining.
  • the removal process can be done better with the use of highly elastic material and grooves with V-shape better than with angular or dovetail-shaped grooves.
  • This groove shape is again better suited for low-elastic material, since the penetration depth can be kept small here. It has been found that depth and width ratios in the range of 1: 1 to 2: 1 are very well suited to prevent the stator during the pump operation from twisting and on the other hand to support the separation process positive. If the lining does not detach itself from the stator jacket, only the bare stator could be inserted between a closure plate and a pressure medium reservoir. The subsequent introduction of the pressure medium (gas, liquid) into the grooves would initiate and accelerate the detachment process.
  • Another embodiment of the invention relates to the polygonal cross-sectional shape of the stator jacket and the liner.
  • a balance must be made between the force generated in the area of the grooves and the area of the edges between the polygonal lateral surfaces to prevent undesirable wear of the lining avoid.
  • the Polygonf ⁇ rmige design of the stator jacket serves as an optimal fixation of the stator lining. From an edge number of 8 edges up a uniform load distribution takes place.
  • stator lining differently in the sections it may be advantageous according to another embodiment of the invention, if at least every other polygon surface has grooves or if at least one groove is introduced into the polygon surfaces. Differently, the different pressure ranges of the stator can be designed. Thus, e.g. in the. Range of higher delivery or back pressure values increases the number of grooves or increases their width or depth.
  • the stator jacket can have a continuous slot over the entire length, which has a slight widening possible.
  • the slot is covered and reduced during operation of the pump by a sealing strip.
  • the stator shell is in the operating state under a bias that dissolves when removing the sealing strip and thus widens the diameter of the stator shell.
  • the length dimension of the lining after production is greater than in the installed state of the lining in the ready-to-use eccentric screw pump.
  • the closure strip has a line system with which a fluid can be pressed between the stator jacket and the lining.
  • FIG. 1 shows a stator jacket 10 with a smooth cylindrical surface as usual in the prior art.
  • the inner surface of the stator shell is polygonal. Twelve surfaces 12, which are flat both in their length and in their width, are arranged next to one another around the inner circumference of the stator jacket. Two surfaces are always bounded by an intermediate edge 14 or are connected by an edge 14 with each other.
  • each surface 12 has three grooves 16. The grooves run parallel to one another along the longitudinal axis of the stator shell 10. The spacing of the grooves 16 relative to each other is the same on each and every surface 12, 12 ', 12 ", 12'" and so on.
  • a longitudinal slot 36 whose width depends inter alia on the diameter and the elasticity of the lining 18, divides the stator jacket on one side.
  • a closure strip 20 engages with these two ends 22, 24 a positive connection and thus ensures that the stator jacket does not expand during pump operation. So that the desired non-stick properties remain the same over the entire inner circumference, what the incorporated grooves 16 provide, the strip can also be provided with a groove. So that the planar course of the inner surfaces 12, 12 ', 12 "is maintained, the ends 22, 24 are curved outwardly, whereby the closure strip forms a positive connection in the outer region and integrated into the surface course inside.
  • FIG. 2 shows the stator casing without sealing strip with the longitudinal slot 36 open.
  • the stator shell 10 of FIG. 3 is designed polygonförrnig on its inside and outside.
  • the inner surfaces 12 and outer surfaces 30 are arranged congruently. All inner surfaces 12 each have three grooves 16 at equal distances from each other. If you choose the strength of the sealing strip less than that of the stator jacket so the closure strip simultaneously fulfills the function of a backup against overpressure.
  • a lining 18 of the stator shell 10 is shown in FIG. 4.
  • a cavity 32 extends with a multi-start thread in which the rotor of the pump rotates.
  • the outer surface of the lining is polygonal shaped and has for this purpose a plurality of mutually parallel outer surfaces 34.
  • the length of the liner in the disassembled state is always greater than that of the stator jacket.
  • the stator lining is axially compressed during installation in the stator shell or in the eccentric screw and receives the required nominal dimensions for the pump cavity.
  • the outer diameter of the stator lining has undersized in the removed state.
EP07722396A 2006-05-11 2007-05-10 Enveloppe de stator pour des pompes à vis sans fin excentriques Not-in-force EP2018478B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200730945T SI2018478T1 (sl) 2006-05-11 2007-05-10 Plaĺ äś statorja za ekscentriäśne polĺ˝ne äśrpalke
PL07722396T PL2018478T3 (pl) 2006-05-11 2007-05-10 Płaszcz stojana dla mimośrodowych pomp ślimakowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006021897A DE102006021897B4 (de) 2006-05-11 2006-05-11 Statormantel für Exzenterschneckenpumpen
PCT/DE2007/000845 WO2007131476A1 (fr) 2006-05-11 2007-05-10 Enveloppe de stator pour des pompes à vis sans fin excentriques

Publications (2)

Publication Number Publication Date
EP2018478A1 true EP2018478A1 (fr) 2009-01-28
EP2018478B1 EP2018478B1 (fr) 2012-04-04

Family

ID=38445698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722396A Not-in-force EP2018478B1 (fr) 2006-05-11 2007-05-10 Enveloppe de stator pour des pompes à vis sans fin excentriques

Country Status (21)

Country Link
US (1) US8033802B2 (fr)
EP (1) EP2018478B1 (fr)
JP (1) JP4886028B2 (fr)
KR (1) KR101161915B1 (fr)
CN (1) CN101443556B (fr)
AT (1) ATE552422T1 (fr)
AU (1) AU2007250390B2 (fr)
BR (1) BRPI0712528B1 (fr)
CA (1) CA2651133A1 (fr)
DE (1) DE102006021897B4 (fr)
DK (1) DK2018478T3 (fr)
ES (1) ES2385258T3 (fr)
MX (1) MX2008014335A (fr)
MY (1) MY149088A (fr)
NZ (1) NZ573585A (fr)
PL (1) PL2018478T3 (fr)
PT (1) PT2018478E (fr)
RU (1) RU2398134C1 (fr)
SI (1) SI2018478T1 (fr)
WO (1) WO2007131476A1 (fr)
ZA (1) ZA200809578B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9051780B2 (en) * 2007-01-09 2015-06-09 Schlumberger Technology Corporation Progressive cavity hydraulic machine
GB2497225B (en) 2010-08-16 2017-10-11 Nat Oilwell Varco Lp Reinforced stators and fabrication methods
RU2468306C2 (ru) * 2010-11-03 2012-11-27 Валерий Никитич Гринавцев Разогреватель турбулентный
US8672656B2 (en) * 2010-12-20 2014-03-18 Robbins & Myers Energy Systems L.P. Progressing cavity pump/motor
JP5821058B2 (ja) * 2010-12-27 2015-11-24 兵神装備株式会社 一軸偏心ねじポンプ
US8905733B2 (en) * 2011-04-07 2014-12-09 Robbins & Myers Energy Systems L.P. Progressing cavity pump/motor
GB2499613B (en) * 2012-02-22 2017-11-01 Nat Oilwell Varco Lp Stator for progressive cavity pump/motor
DE102012112044B4 (de) * 2012-05-04 2015-10-08 Netzsch Pumpen & Systeme Gmbh Selbstfixierendes Statorgehäuse
DE102012008761B4 (de) * 2012-05-05 2016-01-21 Netzsch Pumpen & Systeme Gmbh Geteilter Statormantel
DE202013004219U1 (de) 2013-05-06 2013-05-17 SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG Stator für eine Förderpumpe
CN106685152B (zh) * 2015-11-10 2019-03-12 耐驰（兰州）泵业有限公司 制造用于偏心螺杆泵的可液压调整的定子的方法
DE102017126002B3 (de) 2017-11-07 2019-02-14 Seepex Gmbh Exzenterschneckenpumpe
CN108788642A (zh) * 2018-06-21 2018-11-13 苏州利德精工制造有限公司 真空泵定子加工方法
CA3112348A1 (fr) 2018-09-11 2020-03-19 Rotoliptic Technologies Incorporated Machines rotatives trochoidales helicoides et trochoidales decalees
US11815094B2 (en) 2020-03-10 2023-11-14 Rotoliptic Technologies Incorporated Fixed-eccentricity helical trochoidal rotary machines
CA3115512C (fr) * 2020-04-21 2023-08-22 Roper Pump Company Stator a interieur modulaire
US11802558B2 (en) 2020-12-30 2023-10-31 Rotoliptic Technologies Incorporated Axial load in helical trochoidal rotary machines
CN114810579B (zh) * 2022-04-24 2024-02-27 上海申贝泵业制造有限公司 一种单螺杆泵

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Also Published As

Publication number Publication date
SI2018478T1 (sl) 2012-08-31
AU2007250390B2 (en) 2012-05-24
RU2008148604A (ru) 2010-06-20
KR101161915B1 (ko) 2012-07-03
CN101443556B (zh) 2011-08-03
MX2008014335A (es) 2008-11-27
ES2385258T3 (es) 2012-07-20
DK2018478T3 (da) 2012-07-16
WO2007131476A1 (fr) 2007-11-22
NZ573585A (en) 2011-03-31
ATE552422T1 (de) 2012-04-15
DE102006021897B4 (de) 2009-11-19
PL2018478T3 (pl) 2012-09-28
RU2398134C1 (ru) 2010-08-27
JP2009536703A (ja) 2009-10-15
ZA200809578B (en) 2009-09-30
JP4886028B2 (ja) 2012-02-29
CN101443556A (zh) 2009-05-27
PT2018478E (pt) 2012-07-04
KR20090011022A (ko) 2009-01-30
EP2018478B1 (fr) 2012-04-04
US8033802B2 (en) 2011-10-11
US20090074599A1 (en) 2009-03-19
MY149088A (en) 2013-07-15
CA2651133A1 (fr) 2007-11-22
BRPI0712528B1 (pt) 2019-06-25
DE102006021897A1 (de) 2007-11-15
AU2007250390A1 (en) 2007-11-22
BRPI0712528A2 (pt) 2012-09-04

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