EP0209099B1 - Stator pour pompe à vis - Google Patents

Stator pour pompe à vis Download PDF

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Publication number
EP0209099B1
EP0209099B1 EP86109623A EP86109623A EP0209099B1 EP 0209099 B1 EP0209099 B1 EP 0209099B1 EP 86109623 A EP86109623 A EP 86109623A EP 86109623 A EP86109623 A EP 86109623A EP 0209099 B1 EP0209099 B1 EP 0209099B1
Authority
EP
European Patent Office
Prior art keywords
lining
stator
axis
thickness
sections
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
Application number
EP86109623A
Other languages
German (de)
English (en)
Other versions
EP0209099A1 (fr
Inventor
Eugen Unterstrasser
Johann Kreidl
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 AT86109623T priority Critical patent/ATE39731T1/de
Publication of EP0209099A1 publication Critical patent/EP0209099A1/fr
Application granted granted Critical
Publication of EP0209099B1 publication Critical patent/EP0209099B1/fr
Expired 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

Definitions

  • the rigid tubular jacket is circular-cylindrical inside and out, and accordingly the outer surface of the lining is circular-cylindrical.
  • the inner surface of the lining is double-threaded and has an essentially oval cross-section with two sections close to the axis and two semicircular arches which connect the sections near the axis to one another.
  • the two sections close to the axis are slightly convex, that is to say they are curved towards the central longitudinal axis of the stator; this is intended to achieve a better seal between the stator and a rotor, which has a circular cross section and is coiled in a catchy manner.
  • the particularly thick zones of the elastic lining which form the sections near the axis, are more deformable at the pressure of a conveying medium occurring during operation and are less able to dissipate heat loss to the tubular jacket than the thin zones of the lining .
  • the thickness maxima are therefore no longer in the central region of each of the sections near the axis in which the sliding speed of the rotor has a maximum, but rather the thickness maxima of the lining are laid on the edges of the near-axis sections or even in the initial areas of the adjacent concave arches, with the result that the lining in the middle of each of its near-axis sections has a thickness which is less than the maximum thickness.
  • the result of this is that the rotor can roll over the bulge that has built up in front of it more easily at the entry into one of the concave arches of the inner surface than in known stators of the generic type, thereby protecting the lining.
  • a single-start rotor 34 of circular cross section with radial preload is inserted into the lining 20.
  • the rotor 34 rotates in the direction of the arrow; its greatest sliding speed vg occurs at point VII.
  • This sliding speed vg is composed of the translation of the rotor 34 at the speed v t and the rotation of the rotor about its own axis.
  • the lining 20 has a double-helical inner surface 22, 28 which as such corresponds to that shown in FIG. 1.
  • this inner surface 22, 28 is not twisted with respect to the inner surface of the jacket 10, which is also coiled with two threads, and is not geometrically similar.
  • the inner surface of the jacket 10, against which the outer surface of the lining 20 rests without gaps, has two opposing convex regions 12 of approximately sinusoidal shape and two concave arches 18 which are approximately semicircular, but are somewhat flattened in the region of the main axis 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (5)

1. Stator pour pompe à vis avec une enveloppe rigide (10) tubulaire, dont la surface intérieure (12, 18) constitue un filetage multiple, et un revêtement élastique (20), qui repose sur l'enveloppe (10) sur toute la longueur axiale, est symétrique par rapport à l'axe longitudinal médian (A) du stator et présente une surface intérieure (22, 28) qui constitue aussi un filetage multiple se compose en coupe d'un nombre de sections (22) proches de l'axe égal au nombre de filets du filetage ainsi que d'un nombre égal d'arcs concaves (28), qui se raccordent par des congés fixes (II, IV, VI, VIII) sur les sections (22) proches de l'axe, tandis que le revêtement (20) sur les arcs concaves (28) présente une épaisseur respective minimale (30),
caractérisé en ce que l'épaisseur du revêtement (20), respectivement dans la direction dans laquelle se combinent les mouvements de rotation et de translation du rotor (34) qui s'y insère, augmente de façon continue au moins à partir du milieu de la section (22) proche de l'axe jusqu'à un maximum d'épaisseur (32) au congé dans l'arc concave (28), et diminue de façon continue jusqu'au minimum d'épaisseur (30) dans la zone de l'arc concave (28).
2. Stator selon la revendication 1, caractérisé en ce que la surface intérieure (12, 18) de l'enveloppe (10) et la surface intérieure (22, 28) du revêtement (20) sont géométriquement semblables l'une à l'autre, mais sont décalées angulairement de 5 à 15° l'une par rapport à l'autre autour de l'axe longitudinal médian (A).
3. Stator selon la revendication 2, caractérisé en ce que la surface intérieure (12, 18) de l'enveloppe (10) et la surface intérieure (22, 28) du revêtement (20) sont décalées angulairement de 8 à 12° l'une par rapport à l'autre.
4. Stator selon la revendication 1, caractérisé en ce que l'épaisseur du revêtement (20) présente un minimum (30) au milieu (I, V) de ses arcs concaves (28) respectivement, et un minimum additionnel (36) au milieu (III, VII) de chaque section (22) proche de l'axe.
5. Stator selon la revendication 4, caractérisé en ce que l'épaisseur du revêtement (20) sur les minima additionnels (36) n'est pas plus forte que sur les minima (30) au milieu (I, V) des arcs concaves (28).
EP86109623A 1985-07-17 1986-07-14 Stator pour pompe à vis Expired EP0209099B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109623T ATE39731T1 (de) 1985-07-17 1986-07-14 Stator fuer exzenterschneckenpumpen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3525529A DE3525529C1 (de) 1985-07-17 1985-07-17 Stator fuer Exzenterschneckenpumpen
DE3525529 1985-07-17

Publications (2)

Publication Number Publication Date
EP0209099A1 EP0209099A1 (fr) 1987-01-21
EP0209099B1 true EP0209099B1 (fr) 1989-01-04

Family

ID=6276006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109623A Expired EP0209099B1 (fr) 1985-07-17 1986-07-14 Stator pour pompe à vis

Country Status (6)

Country Link
US (1) US4863359A (fr)
EP (1) EP0209099B1 (fr)
JP (1) JPH071035B2 (fr)
AT (1) ATE39731T1 (fr)
BR (1) BR8603356A (fr)
DE (2) DE3525529C1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120204A (en) * 1989-02-01 1992-06-09 Mono Pumps Limited Helical gear pump with progressive interference between rotor and stator
GB2244517B (en) * 1990-05-31 1994-05-04 Mono Pumps Ltd Helical gear pump and stator
DE4237966A1 (de) * 1992-11-11 1994-05-26 Arnold Jaeger Exzenterschneckenpumpe
US5832604A (en) * 1995-09-08 1998-11-10 Hydro-Drill, Inc. Method of manufacturing segmented stators for helical gear pumps and motors
DE19950258A1 (de) * 1999-10-18 2001-04-26 Wilhelm Kaechele Gmbh Elastome Stator mit stabilen Stirnring
US6604921B1 (en) 2002-01-24 2003-08-12 Schlumberger Technology Corporation Optimized liner thickness for positive displacement drilling motors
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
US8888474B2 (en) 2011-09-08 2014-11-18 Baker Hughes Incorporated Downhole motors and pumps with asymmetric lobes
US11815092B2 (en) * 2021-01-19 2023-11-14 Musashi Engineering, Inc. Fluid transfer device, coating device comprising same, and coating method
JP7138383B1 (ja) * 2022-01-18 2022-09-16 兵神装備株式会社 一軸偏心ねじポンプ
JP7138382B1 (ja) * 2022-01-18 2022-09-16 兵神装備株式会社 一軸偏心ねじポンプ
JP7199128B1 (ja) * 2022-01-18 2023-01-05 兵神装備株式会社 一軸偏心ねじポンプ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084631A (en) * 1962-01-17 1963-04-09 Robbins & Myers Helical gear pump with stator compression
US3499389A (en) * 1967-04-19 1970-03-10 Seeberger Kg Worm pump
DE1653897A1 (de) * 1967-04-19 1971-07-01 Seeberger Kg Maschinen Und Ger Schneckenpumpe
DE1653899A1 (de) * 1967-08-12 1971-09-30 Seeberger Kg Maschinen Und Ger Schneckenpumpe
DE2017620C3 (de) * 1970-04-13 1981-07-16 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Exzenterschneckenpumpe
DE2408186A1 (de) * 1974-02-20 1975-08-21 Lonza Werke Gmbh Exzenterschneckenpumpe
FR2343906A1 (fr) * 1976-03-09 1977-10-07 Mecanique Metallurgie Ste Gle Perfectionnements aux stators de pompes a vis
DE2817280A1 (de) * 1978-04-20 1979-10-25 Streicher Foerdertech Stator fuer exzenterschneckenpumpen
JPS6017954B2 (ja) * 1981-04-23 1985-05-08 兵神装備株式会社 一軸偏心ねじポンプ
DE3147663A1 (de) * 1981-12-02 1983-06-09 Gummi-Jäger KG GmbH & Cie, 3000 Hannover Stator fuer schneckenpumpen
US4676725A (en) * 1985-12-27 1987-06-30 Hughes Tool Company Moineau type gear mechanism with resilient sleeve

Also Published As

Publication number Publication date
EP0209099A1 (fr) 1987-01-21
BR8603356A (pt) 1987-02-24
DE3525529C1 (de) 1986-08-07
JPS6220684A (ja) 1987-01-29
DE3661645D1 (en) 1989-02-09
ATE39731T1 (de) 1989-01-15
JPH071035B2 (ja) 1995-01-11
US4863359A (en) 1989-09-05

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