FR2487017A1 - STATOR FOR SINGLE SCREW PUMP - Google Patents

STATOR FOR SINGLE SCREW PUMP Download PDF

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Publication number
FR2487017A1
FR2487017A1 FR8114017A FR8114017A FR2487017A1 FR 2487017 A1 FR2487017 A1 FR 2487017A1 FR 8114017 A FR8114017 A FR 8114017A FR 8114017 A FR8114017 A FR 8114017A FR 2487017 A1 FR2487017 A1 FR 2487017A1
Authority
FR
France
Prior art keywords
stator
pump
sections
metal
sleeve
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
FR8114017A
Other languages
French (fr)
Other versions
FR2487017B1 (en
Inventor
Antal Nador
Lajos Gulyas
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.)
FEMMECHANIKA
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FEMMECHANIKA
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 FEMMECHANIKA filed Critical FEMMECHANIKA
Publication of FR2487017A1 publication Critical patent/FR2487017A1/en
Application granted granted Critical
Publication of FR2487017B1 publication Critical patent/FR2487017B1/en
Expired legal-status Critical Current

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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings

Landscapes

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

Abstract

The invention relates to a stator of a single-worm screw pump and is intended to perfect the stator design known at present. The stator according to the invention has sleeve sections whose outer part is made from a material combined from metal and elastomer and whose strength is distinguished by a certain rigidity, so that it is possible, after introducing the stator composed of sections of corresponding length into a metal sleeve, to generate any counter pressure required. An advantageous embodiment of the stator according to the invention is characterized in that there is arranged, in the cavity of the sleeve section downstream of the threaded section, a differential pump which is controlled by the pressure prevailing in the pressure chamber of the pump and by the use of which the positive pressure required for correction can be generated automatically.

Description

L'invention concerne les pompes à vis simples et elle aThe invention relates to single screw pumps and has

pour but le perfectionnement des stators de telles pompes.  for the purpose of improving the stators of such pumps.

On connaît des pompes à vis dont les stators ou corps sont exécutés sous une forme modulaire, c'est-à-dire sous la forme de tronçons de longueur unitaire ou de douilles dont le  Screw pumps are known of which the stators or bodies are executed in a modular form, that is to say in the form of sections of unit length or sockets whose

profil intérieur en hélice est adapté d'une douille à l'autre.  helical interior profile is adapted from one socket to another.

L'intérieur de toutes les douilles est muni d'un revêtement  The inside of all the sockets has a coating

élastique. Les revêtements s'étendent sur les surfaces fron-  elastic. The coatings extend over the front surfaces

tales des douilles et les recouvrent au moins en partie. Les parties de revêtement dépassant sur les surfaces frontales comportent des profilés d'étanchéité faits dans leur propre  at least partially covering the bushings. The covering parts protruding on the front surfaces have sealing profiles made in their own

matière. Ces douilles sont fixées dans leur position réci-  matter. These sockets are fixed in their recessed position.

proque correcte pour assurer la continuité du profil intérieur  correct process to ensure continuity of the interior profile

en hélice par des pieds de centrage.  in helix by centering feet.

Cette solution a l'avantage qu'à partir des différentes douilles formant des éléments constitutifs modulaires, il est  This solution has the advantage that from the different sockets forming modular components, it is

possible de construire des stators de n'importe quelle lon-  possible to build stators of any length

gueur. L'avantage le plus important qui en découle est qu'on peut assembler entre eux n'importe quel nombre nécessaire de ces éléments, qui sont fabriqués à l'avance et même en grande série, tout en représentant un faible poids, de sorte qu'on peut monter le nombre de chambres délimitées, par le profil en hélice du stator et par le rotor, nécessaire à la pression de refoulement recherchée de la pompe. Mais la solution décrite ci-dessus n'offre pas assez de garanties pour réduire les pertes intersticielles, ainsi que pour compenser l'usure du  cheerfully. The most important advantage which results from this is that any necessary number of these elements can be assembled together, which are produced in advance and even in large series, while representing a low weight, so that 'one can mount the number of chambers delimited by the helical profile of the stator and by the rotor, necessary for the desired discharge pressure of the pump. But the solution described above does not offer enough guarantees to reduce interstitial losses, as well as to compensate for the wear of the

profil hélicoïdal du stator et du rotor.  helical profile of the stator and rotor.

Le but de l'invention est de créer un stator pour pompes à vis simple n'ayant pas les défauts ci-dessus, de manière à  The object of the invention is to create a stator for simple screw pumps not having the above faults, so as to

assurer des possibilités pour réduire les pertes intersti-  provide opportunities to reduce intersti-

cielles et pour compenser l'usure.to compensate for wear.

Ce but est atteint par le fait que la partie extérieure de chaque douille du stator est en élastomère et que le stator est en élastomère et que le stator (donc les douilles) est (sont) disposé(s) dans un tube métallique chaque douille peut  This object is achieved by the fact that the external part of each socket of the stator is made of elastomer and that the stator is made of elastomer and that the stator (therefore the sockets) is (are) placed in a metal tube each socket can

être constituée par une combinaison de métal et d'élastomère.  be made up of a combination of metal and elastomer.

Cette partie extérieure présente une résistance permet-  This external part has a resistance allowing

tant une certaine rigidité, de sorte qu'un stator de longueur adéquate, composé des douilles indiquées, peut être logé dans  both a certain rigidity, so that a stator of adequate length, composed of the sockets indicated, can be housed in

un tube métallique et que n'importe quelle pression de refou-  a metal tube and that any discharge pressure

lement peut être produite.can also be produced.

Suivant une forme d'exécution avantageuse du stator con-  According to an advantageous embodiment of the stator

forme à l'invention, le profil en hélice de chaque douille est suivi, de part et d'autre, par une cavité. A cette cavité est  In accordance with the invention, the helical profile of each bushing is followed, on both sides, by a cavity. At this cavity is

reliée une pompe à piston différentiel commandée par la pres-  connected to a differential piston pump controlled by the

sion régnant dans la chambre de refoulement de la pompe, ce qui permet de créer automatiquement dans cette cavité une surpression nécessaire à l'étanchéité et à la compensation de l'usure. On expliquera l'invention plus en détail à l'aide d'un mode de réalisation donné à titre d'exemple illustratif et représenté sur le dessin annexé. Sur ce dessin: la fig. 1 est la vue en bout d'un tronçon (douille) d'un stator; la fig. 2 est une coupe suivant II-Il de la fig. 1, mais  Zion prevailing in the discharge chamber of the pump, which automatically creates in this cavity an overpressure necessary for sealing and to compensate for wear. The invention will be explained in more detail using an embodiment given by way of illustrative example and shown in the accompanying drawing. In this drawing: fig. 1 is the end view of a section (socket) of a stator; fig. 2 is a section along II-II of FIG. 1, but

après détorsion suivant le profil en hélice.  after untwisting according to the helical profile.

La surface extérieure du tronçon de stator (douille) 1  The outer surface of the stator section (socket) 1

est un cylindre circulaire dans la forme d'exécution repré-  is a circular cylinder in the embodiment shown

sentée, mais elle peut être une forme différente. L'espace intérieur de la douille 1 est défini par un profil hélicoidal  felt, but it can be a different form. The interior space of the socket 1 is defined by a helical profile

2 et est muni d'un revêtement 3 fabriqué en une matière élas-  2 and is provided with a coating 3 made of an elastic material

tique. Le revêtement élastique 3 entoure le profil intérieur avec une épaisseur de paroi régulière, qui est caractéristique pour la taille de la pompe. Le profil hélicoîdal est suivi, de part et d'autre, par une cavité 4,5. Ledit revêtement 3 est conçu de façon que sur les bords du profil hélicoïdal 2 il y  tick. The elastic coating 3 surrounds the interior profile with a regular wall thickness, which is characteristic for the size of the pump. The helical profile is followed, on both sides, by a cavity 4,5. Said covering 3 is designed so that on the edges of the helical profile 2 there are

ait des organes d'assemblage 6 servant à l'étanchéité.  has assembly members 6 used for sealing.

Le stator d'une longueur adéquate et composé des douilles peut être logé dans un tube métallique non représenté; dans les cavités 4,5 qui suivent le profil en hélice on peut faire régner n'importe quelle pression, de sorte que le profil  The stator of an adequate length and composed of the sockets can be housed in a metal tube not shown; in the cavities 4.5 which follow the helical profile, any pressure can be applied, so that the profile

hélicoïdal déformé compense l'usure.  deformed helical compensates for wear.

24870 1 724870 1 7

Claims (3)

REVENDICATIONS 1. Stator pour pompe à vis simple comportant des tronçons de stator creux, adaptés les uns aux autres et possédant un  1. Stator for single screw pump comprising hollow stator sections, adapted to each other and having a profil intérieur hélicoidal, ces tronçons possédant un revê-  helical interior profile, these sections having a coating tement intérieur élastique et des profilés d'étanchéité faits de la même matière que le revêtement, caractérisé par le fait  elastic internal structure and sealing profiles made of the same material as the covering, characterized by the fact que la partie extérieure des tronçons de stator est en élasto-  that the outer part of the stator sections is made of elastic mère et que le stator est disposé dans un tube métallique.  mother and that the stator is placed in a metal tube. 2. Stator selon la revendication 1, caractérisé par le fait que le tronçon de stator est formé par une combinaison de  2. Stator according to claim 1, characterized in that the stator section is formed by a combination of métal et d'élastomère.metal and elastomer. 3. Stator selon la revendication 1 ou 2, caractérisé par le fait que le profil en hélice du tronçon de stator est suivi, de part et d'autre, par une cavité raccordée à une pompe à piston différentiel qui est relié à la chambre de  3. Stator according to claim 1 or 2, characterized in that the helical profile of the stator section is followed, on both sides, by a cavity connected to a differential piston pump which is connected to the refoulement de la pompe.pump discharge.
FR8114017A 1980-07-17 1981-07-17 STATOR FOR SINGLE SCREW PUMP Expired FR2487017B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU801785A HU181561B (en) 1980-07-17 1980-07-17 Stator for single-spindle screw pump

Publications (2)

Publication Number Publication Date
FR2487017A1 true FR2487017A1 (en) 1982-01-22
FR2487017B1 FR2487017B1 (en) 1987-12-24

Family

ID=10956188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8114017A Expired FR2487017B1 (en) 1980-07-17 1981-07-17 STATOR FOR SINGLE SCREW PUMP

Country Status (7)

Country Link
CS (1) CS238373B2 (en)
DD (1) DD202924A5 (en)
DE (1) DE3126988A1 (en)
FR (1) FR2487017B1 (en)
GB (1) GB2081812B (en)
HU (1) HU181561B (en)
IT (1) IT1167465B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633017A1 (en) * 1988-06-16 1989-12-22 Stihl Andreas PUMP FOR VISCOUS LIQUIDS, OIL PUMP IN PARTICULAR
EP0459740A1 (en) * 1990-05-31 1991-12-04 Mono Pumps Limited Helical gear pump and stator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710930A1 (en) * 1987-04-01 1988-10-20 Gd Anker Gmbh & Co Kg Eccentric spiral pump
AT401089B (en) * 1988-09-30 1996-06-25 Gd Anker Gruber Duebel Anker G Eccentric screw pump
US5171138A (en) * 1990-12-20 1992-12-15 Drilex Systems, Inc. Composite stator construction for downhole drilling motors
WO2005042910A2 (en) 2003-10-27 2005-05-12 Dyna-Drill Technologies, Inc. Asymmetric contouring of elastomer liner on lobes in a moineau style power section stator
US7407372B2 (en) * 2004-05-14 2008-08-05 Robbins & Myers Energy Systems L.P. Progressing cavity pump or motor
DE102004038477B3 (en) * 2004-08-07 2005-10-06 Netzsch-Mohnopumpen Gmbh Cavity Pump
US7517202B2 (en) 2005-01-12 2009-04-14 Smith International, Inc. Multiple elastomer layer progressing cavity stators
US9393648B2 (en) 2010-03-30 2016-07-19 Smith International Inc. Undercut stator for a positive displacment motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621605A (en) * 1945-10-12 1952-12-16 Clayton Mark & Company Pump
GB800154A (en) * 1955-09-30 1958-08-20 Ahmad Aziz Improvements in or relating to rotary pumps or motors
GB1150339A (en) * 1966-03-15 1969-04-30 Karl Schlecht Improvements in or relating to Screw Pumps
DE2161116A1 (en) * 1971-12-09 1973-06-14 Moeller Heinrich HOUSING INSERT FOR ECCENTRIC SCREW PUMPS
US3912426A (en) * 1974-01-15 1975-10-14 Smith International Segmented stator for progressive cavity transducer
DE2512792A1 (en) * 1975-03-22 1976-09-30 Gummi Jaeger Kg Gmbh & Cie Cover of eccentric worm pump stator - is of rubber or elastomer and of greater Shore hardness than stator
DE2619751A1 (en) * 1976-05-05 1977-11-17 Mathis Fertigputz Eccentric worm pump stator housing maintained under tension - has adjustable circumference and is covered with pressure transmitting vulcanised material
FR2349729A1 (en) * 1976-04-27 1977-11-25 Tiraspolsky Wladimir Hydraulic machine with helical rotor - has internal and external helices assembled from separately machined longitudinal sections

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653910A1 (en) * 1967-06-09 1971-10-14 Seidl Wilhelm Dipl Ing Device for axially lining up several stators in eccentric screw pumps
DE7146795U (en) * 1971-12-13 1972-03-23 Vibrastop Gummimetallverbindungen Kaechele W ADJUSTABLE STATOR
DE2408186A1 (en) * 1974-02-20 1975-08-21 Lonza Werke Gmbh Eccentric pump with screw rotor and stator - has cavities between stator and housing
DE2817280A1 (en) * 1978-04-20 1979-10-25 Streicher Foerdertech STATOR FOR ECCENTRIC SCREW PUMPS

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621605A (en) * 1945-10-12 1952-12-16 Clayton Mark & Company Pump
GB800154A (en) * 1955-09-30 1958-08-20 Ahmad Aziz Improvements in or relating to rotary pumps or motors
GB1150339A (en) * 1966-03-15 1969-04-30 Karl Schlecht Improvements in or relating to Screw Pumps
DE2161116A1 (en) * 1971-12-09 1973-06-14 Moeller Heinrich HOUSING INSERT FOR ECCENTRIC SCREW PUMPS
US3912426A (en) * 1974-01-15 1975-10-14 Smith International Segmented stator for progressive cavity transducer
DE2512792A1 (en) * 1975-03-22 1976-09-30 Gummi Jaeger Kg Gmbh & Cie Cover of eccentric worm pump stator - is of rubber or elastomer and of greater Shore hardness than stator
FR2349729A1 (en) * 1976-04-27 1977-11-25 Tiraspolsky Wladimir Hydraulic machine with helical rotor - has internal and external helices assembled from separately machined longitudinal sections
DE2619751A1 (en) * 1976-05-05 1977-11-17 Mathis Fertigputz Eccentric worm pump stator housing maintained under tension - has adjustable circumference and is covered with pressure transmitting vulcanised material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633017A1 (en) * 1988-06-16 1989-12-22 Stihl Andreas PUMP FOR VISCOUS LIQUIDS, OIL PUMP IN PARTICULAR
EP0459740A1 (en) * 1990-05-31 1991-12-04 Mono Pumps Limited Helical gear pump and stator
US5145343A (en) * 1990-05-31 1992-09-08 Mono Pumps Limited Helical gear pump and stator with constant rubber wall thickness

Also Published As

Publication number Publication date
DE3126988A1 (en) 1982-02-25
GB2081812B (en) 1984-08-08
CS238373B2 (en) 1985-11-13
FR2487017B1 (en) 1987-12-24
GB2081812A (en) 1982-02-24
DD202924A5 (en) 1983-10-05
DE3126988C2 (en) 1987-06-25
IT8122827A0 (en) 1981-07-09
IT1167465B (en) 1987-05-13
HU181561B (en) 1983-10-28

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