EP0634236A1 - Procédé de fabrication de rotors pour pompes à vis excentrique - Google Patents

Procédé de fabrication de rotors pour pompes à vis excentrique Download PDF

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Publication number
EP0634236A1
EP0634236A1 EP94110718A EP94110718A EP0634236A1 EP 0634236 A1 EP0634236 A1 EP 0634236A1 EP 94110718 A EP94110718 A EP 94110718A EP 94110718 A EP94110718 A EP 94110718A EP 0634236 A1 EP0634236 A1 EP 0634236A1
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EP
European Patent Office
Prior art keywords
strand
rod
tool
rotor
rotors
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.)
Withdrawn
Application number
EP94110718A
Other languages
German (de)
English (en)
Inventor
Jürgen Kosak
ARNOLD JäGER
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.)
Artemis Kautschuk und Kunststoff Technik GmbH
Original Assignee
Artemis Kautschuk und Kunststoff Technik 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 Artemis Kautschuk und Kunststoff Technik GmbH filed Critical Artemis Kautschuk und Kunststoff Technik GmbH
Publication of EP0634236A1 publication Critical patent/EP0634236A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/12—Bending tubes using mandrels or the like by pushing over a curved mandrel; by pushing through a curved die
    • B21D9/125—Bending tubes using mandrels or the like by pushing over a curved mandrel; by pushing through a curved die by pushing through a curved die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • 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
    • 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
    • F04C2230/20—Manufacture essentially without removing material
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors

Definitions

  • the invention relates to a method for producing rotors of eccentric screw pumps in which the rigid rotor is arranged in a stator lined on the inside with an elastomer, the stator and the cavity of the stator receiving it being designed in the manner of a steep thread, but the rotor is or multiple gears and the stator two or more gears are designed in such a way that the number of gears of the stator is always one gear greater than the rotor.
  • the external shape of the rotor and the cavity of the stator receiving it must be dimensioned precisely, but also have to be precisely shaped in themselves.
  • the rotor made of steel or the like is manufactured by milling and whirling.
  • rotors for progressing cavity pumps can only be used a greater effort, which is especially true for longer rotors.
  • the invention is based on the object of producing the rotors mentioned at the outset in such a way that milling or whirling operations are unnecessary and accordingly longer stators can also be manufactured at a lower cost with less material.
  • a strand or a rod with a cross section at least substantially corresponding to the rotor is permanently deformed by twisting and / or converting it into a helical shape, thus imparting the shape to it in the manner of a steep thread.
  • an easy-to-manufacture strand preferably in the form of a straight rod, which has the same cross-section over its entire length; this strand or rod is now possibly twisted at elevated temperature (torsion twist), in order to manufacture a steep-thread body from the strand or rod, whereby, however, an operation can possibly follow, in which the already twisted rod can be brought to an exact cross-section.
  • a particular advantage of this method is that it is possible to start from strands or rods of greater length that are deformed over the entire length in the sense of the invention.
  • the longer strands or rods treated in this way can then be used as correspondingly long rotors, but can also be divided into any number of smaller sections and thus into a correspondingly large number of shorter rotors.
  • end fittings of the rotors so manufactured - e.g. the coupling elements - can be manufactured on their own in order to retrofit them e.g. to be connected by welding to the rod or the actual rotor body.
  • the associated stator according to FIGS. 4 and 5 consists of a jacket 3 made of steel, which encloses a lining 4 made of an elastomer, which in turn is firmly connected to the jacket 3.
  • the lining 4 delimits the pump cavity 5 for receiving the rotor according to FIG. 3.
  • a straight rod 10 is assumed on the basis of the invention, which has an essentially elliptical, full cross-section, which obtains its accuracy and strength by pulling a correspondingly prepared straight rod.
  • This rod 10 is rotated on suitable devices, if necessary at elevated temperature, e.g. by clamping its two ends, in the sense of the two opposite rotating arrows 11, 12.
  • Longer rods 10 are used, e.g. Rods 10 with a length of 2 - 3 m, from which the required lengths for a rotor can then be separated, if required.
  • the twisted rods 10 can still be calibrated if particularly high demands are placed on the accuracy. If the individual lengths are available for the associated stator, they are provided with the couplings 2, which can be brought about by a welded connection.
  • the invention not only enables the production of comparatively long rotors, but rather - as described - it can be assumed that there is a long rod 10 which then serves as the basis for a large number of rotors.
  • a tool 14 In the manufacture of single-turn rotors, a tool 14 is used with a rigid, active section 15 running in the manner of a helix, which has a holder at the rear end, which e.g. can be fastened in a lathe in order to be able to bring about a rotation of the tool about the longitudinal axis 17 in the direction of the arrow 18. Accordingly, the tool has practically the shape of a coil spring with a clear, central passage cross section with a diameter D.
  • the rotor to be manufactured for the stator according to FIG. 7 is designated 19; it has a round cross section and has a helical shape with the formation of a steep thread 1.
  • the associated pump cavity 5 is designed accordingly, but has two courses. This space for receiving the funding is shown cross-hatched. In this pump, the pump cavity 5 is designed in the manner of a double-start helix thread 1;
  • the cross section of the pump cavity 5 and the cross section of the rotor 19 can be seen from FIG. 8, as is customary with single-start eccentric screw pumps.
  • a strand made of metal with the diameter R is used, which is connected at its front end 20 to the free, not clamped end 21 of the tool 14, e.g. is releasably connected by a clamp.
  • the tool 14 is now rotated about its longitudinal axis 17 in the direction of the arrow 18, the strand being continuously introduced obliquely in the direction of the arrow 22 into the windings of the tool, with deformation of the strand to form the steep thread 1.
  • With the rotary movement of the Tool 14 moves the feed point of the strand into tool 14 in the direction of arrow 23 in the direction of the holder or clamping point for tool 14.
  • a sufficiently large length of the steep thread is produced in this way, for example with a length L, the strand is separated. Since this has the shape of a helical line, the section of the strand can be unscrewed or unscrewed from the tool 14 by rotation in the opposite direction of the arrow 18.
  • the strand thus given can already be used as a rotor 19 if it or the like at the drive end 19 'with the coupling parts. is provided by welding.
  • the diameter D or through-section of the tool 14, viewed in the direction of its longitudinal axis, is smaller than the diameter R of the rotor 19 in order to be able to achieve permanent deformation of the strand in the desired sense.
  • the strand in order to permanently deform a strand to produce a rotor 19, the strand is also to a certain extent in a non-rotating tool can be wrapped, in each case in the free spaces between the turns of the tool.
  • Other, similar deformation options can also be used, but in all cases using a rod or a strand that is still straight or straight.
  • the tool 14 has a right-hand thread, which inevitably leads to a rotor 19 with a right-hand thread.
  • the invention does not exclude that after the manufacture of the rotors or the manufacturing cores, operations are still carried out on them. It is advantageous on the basis of the invention to bring about permanent deformations at the ends of the rotors or cores if reductions or increases in the pressures between the rotor or the steep thread 1 on the one hand and the lining 4 on the other hand are expedient for the operation of the pump.
  • the rotor, but also the core can be machined in order to influence the dimensions of the lining 4 during its molding.
  • the widening of the rotors or cores can be done here by upsetting, but also by widening, in that bores are provided at the ends of the rotors or cores for driving in cones.
  • Reductions in diameter can be brought about by pressing in dies or the like. This subsequent processing is usually carried out over a length of about 4 to 8 cm, and in such a way that the rotors or cores widen conically towards their free ends or conically decrease in diameter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP94110718A 1993-07-15 1994-07-10 Procédé de fabrication de rotors pour pompes à vis excentrique Withdrawn EP0634236A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4323759 1993-07-15
DE19934323759 DE4323759A1 (de) 1993-07-15 1993-07-15 Verfahren zur Herstellung von Rotoren für Exzenterschneckenpumpen

Publications (1)

Publication Number Publication Date
EP0634236A1 true EP0634236A1 (fr) 1995-01-18

Family

ID=6492912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110718A Withdrawn EP0634236A1 (fr) 1993-07-15 1994-07-10 Procédé de fabrication de rotors pour pompes à vis excentrique

Country Status (2)

Country Link
EP (1) EP0634236A1 (fr)
DE (1) DE4323759A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4168C1 (ro) * 2010-08-09 2012-12-31 Филипп ЧОБАН Dispozitiv şi procedeu de profilare a arborilor elicoidali
WO2020016386A3 (fr) * 2018-07-18 2020-03-26 Vogelsang Gmbh & Co. Kg Rotor pour une pompe à cavité progressive et son procédé de fabrication
CN113894171A (zh) * 2021-10-13 2022-01-07 北京科技大学 螺旋杆三辊驱动挤压成形装置及工艺
US12129851B2 (en) 2021-11-30 2024-10-29 Vogelsang Gmbh & Co Kg Eccentric screw pump with working engagement and idle engagement and method for controlling the eccentric screw pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19633984A1 (de) * 1996-08-22 1998-02-26 Wilhelm Kaechele Gmbh Kautschu Exzenterschneckenpumpe mit nicht spangebend hergestelltem Rotor
DE19830962B4 (de) * 1998-07-10 2005-07-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Biegen stangenartiger Werkstücke

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2174814A (en) * 1937-03-31 1939-10-03 Ackerman Blaesser Fezzey Inc Method of forming helical gears
US2505623A (en) * 1948-07-15 1950-04-25 Tube Turns Inc Apparatus for manufacture of helical coils of tubing
US2522499A (en) * 1945-04-28 1950-09-19 Berglund Jonas Olov Method of manufacturing twisted drills and other tools
DE3311214A1 (de) * 1981-12-16 1984-10-04 Sigma Koncern, Olmütz/Olomouc Formwerkzeug zur herstellung von drallteilen aus rohrrohlingen
FR2585594A1 (fr) * 1983-03-14 1987-02-06 Sigma Koncern Dispositif de faconnage, notamment de corps helicoidaux
EP0344570A2 (fr) * 1988-05-30 1989-12-06 SIEKMANN FITTINGS GMBH & CO. KG Procédé et dispositif de fabrication d'un tube en forme d'hélice
EP0353553A2 (fr) * 1988-07-30 1990-02-07 Gummi-Jäger Kg Gmbh & Cie Procédé de fabrication de stators pour pompes à vis excentrique
WO1994004295A1 (fr) * 1992-08-25 1994-03-03 Forges De Courcelles-Centre S.A. Procede de realisation de pieces a pas helicoidal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59438C (de) * A. VOGT in Berlin, Köpenickerstr. 25 a Vorrichtung zur Herstellung einer Verbindung zwischen den Stockwerken von Gebäuden
DE1575617A1 (de) * 1966-07-28 1972-03-02 Rau Swf Autozubehoer Gewindeschnecke
FR2366828A1 (fr) * 1976-10-05 1978-05-05 Micro Mega Sa Bourre-pate dentaire pour l'introduction de pates d'obturation dans les canaux dentaires en cours de traitement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2174814A (en) * 1937-03-31 1939-10-03 Ackerman Blaesser Fezzey Inc Method of forming helical gears
US2522499A (en) * 1945-04-28 1950-09-19 Berglund Jonas Olov Method of manufacturing twisted drills and other tools
US2505623A (en) * 1948-07-15 1950-04-25 Tube Turns Inc Apparatus for manufacture of helical coils of tubing
DE3311214A1 (de) * 1981-12-16 1984-10-04 Sigma Koncern, Olmütz/Olomouc Formwerkzeug zur herstellung von drallteilen aus rohrrohlingen
FR2585594A1 (fr) * 1983-03-14 1987-02-06 Sigma Koncern Dispositif de faconnage, notamment de corps helicoidaux
EP0344570A2 (fr) * 1988-05-30 1989-12-06 SIEKMANN FITTINGS GMBH & CO. KG Procédé et dispositif de fabrication d'un tube en forme d'hélice
EP0353553A2 (fr) * 1988-07-30 1990-02-07 Gummi-Jäger Kg Gmbh & Cie Procédé de fabrication de stators pour pompes à vis excentrique
WO1994004295A1 (fr) * 1992-08-25 1994-03-03 Forges De Courcelles-Centre S.A. Procede de realisation de pieces a pas helicoidal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD4168C1 (ro) * 2010-08-09 2012-12-31 Филипп ЧОБАН Dispozitiv şi procedeu de profilare a arborilor elicoidali
WO2020016386A3 (fr) * 2018-07-18 2020-03-26 Vogelsang Gmbh & Co. Kg Rotor pour une pompe à cavité progressive et son procédé de fabrication
CN112423924A (zh) * 2018-07-18 2021-02-26 福格申有限责任两合公司 用于偏心螺杆泵的转子及其制造方法
JP2021529678A (ja) * 2018-07-18 2021-11-04 フォーゲルザンク・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コムパニー・コマンディットゲゼルシャフトＶｏｇｅｌｓａｎｇ ＧｍｂＨ ＆ Ｃｏ． ＫＧ 偏心ネジポンプ用ロータ及びその製造方法
AU2019304057B2 (en) * 2018-07-18 2022-08-11 Vogelsang Gmbh & Co. Kg Rotor for an eccentric screw pump and method for the manufacture thereof
CN112423924B (zh) * 2018-07-18 2023-10-31 福格申有限责任两合公司 用于偏心螺杆泵的转子及其制造方法
US11841016B2 (en) 2018-07-18 2023-12-12 Vogelsang Gmbh & Co Kg Rotor for an eccentric screw pump and method for the manufacture thereof
CN113894171A (zh) * 2021-10-13 2022-01-07 北京科技大学 螺旋杆三辊驱动挤压成形装置及工艺
US12129851B2 (en) 2021-11-30 2024-10-29 Vogelsang Gmbh & Co Kg Eccentric screw pump with working engagement and idle engagement and method for controlling the eccentric screw pump

Also Published As

Publication number Publication date
DE4323759A1 (de) 1995-01-19

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