EP1282777B1 - Pompe a piston rotatif - Google Patents

Pompe a piston rotatif Download PDF

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Publication number
EP1282777B1
EP1282777B1 EP00941960A EP00941960A EP1282777B1 EP 1282777 B1 EP1282777 B1 EP 1282777B1 EP 00941960 A EP00941960 A EP 00941960A EP 00941960 A EP00941960 A EP 00941960A EP 1282777 B1 EP1282777 B1 EP 1282777B1
Authority
EP
European Patent Office
Prior art keywords
piston
pump
pump according
polymer
recess
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 - Lifetime
Application number
EP00941960A
Other languages
German (de)
English (en)
Other versions
EP1282777A1 (fr
Inventor
Harald Vogelsang
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.)
Hugo Vogelsang Maschinenbau GmbH
Original Assignee
Hugo Vogelsang Maschinenbau 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 Hugo Vogelsang Maschinenbau GmbH filed Critical Hugo Vogelsang Maschinenbau GmbH
Publication of EP1282777A1 publication Critical patent/EP1282777A1/fr
Application granted granted Critical
Publication of EP1282777B1 publication Critical patent/EP1282777B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • 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
    • F04C2230/60—Assembly methods
    • F04C2230/602—Gap; Clearance
    • 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
    • F04C2230/80—Repairing methods

Definitions

  • the invention relates to a pump having one or more rotatable pistons according to the preamble of claim 1 and to a method for compensating for wear-related wear of an outer polymer layer of a pump piston according to the preamble of claim 11.
  • Such a pump is known from the GB-A-1302087 (equals to DE-A-2002518 same applicant).
  • the DE-A-20 02 518 shows an elastomer coating for rotary lobes of pumps, which are used for the promotion of solids loaded suspensions.
  • a coating can yield elastically, provided that solid particles penetrate into the gap between the piston and the wall or into the gap between the rotational pistons spaced as closely as possible from each other. This prevents blocking of the rotational movement by solids.
  • the EP 0 599 333 B1 shows therefore piston parts, which are individually interchangeable, without having to replace the entire piston.
  • the wing tips are designed as push-on sealing strips, which are fastened in a dovetail-shaped guide and can be replaced if necessary.
  • the production cost of such a design is very high.
  • In In
  • In also usually all the piston tips must be replaced at the same time, so that overall the maintenance costs for such replacement is increased, since the number of parts to be replaced compared to a replacement of a piston has grown significantly.
  • the formation of such a dovetail guide manufacturing technology is very expensive.
  • the invention is based on the problem to counteract the wear-related wear of an outer polymer layer of a pump piston with the least possible effort.
  • Such a recess may extend substantially along a contact line of the piston to a wall of the pump chamber, so counteract a radial dilution of the outer polymer layer by introducing a support body, as well as be arranged substantially perpendicular to the axis of rotation, so that the introduction of the support body transverse to the axial course against the wall of the pump chamber sealing piston areas, which are also exposed to wear, expands.
  • the pump 1 according to the embodiment shown in Fig. 1 has a pump chamber 2, in which two identically designed piston 3,4 roll on each other and convey a liquid from an entrance slit 5 to an outlet opening 6.
  • the pistons 3 and 4 are each formed with two lobes, which is not mandatory.
  • the pistons run in the direction of the arrows 7, 8 about the axes of rotation 9, 10 and are held detachably by means of paralleling springs 11, 12 on the shafts 13, 14.
  • the wing tips 3a, 3b and 4a, 4b are guided during the rotation at a close distance to the walls 15,16 of the pump chamber 2 and the respective other piston 3 and 4 respectively.
  • the pistons 3, 4 are encircled by an elastic polymer layer, in particular an elastomer layer, at least around the highly loaded wing tips 3a, 3b or 4a, 4b. This seals the piston 3,4 against each other and against the walls 15,16 of the pump chamber 2 from.
  • Fig. 1 see also Fig.
  • wing tips 3a, 3b, 4a, 4b each have a recess disposed within the elastomer layer 17,18, which extends parallel to the axis of rotation 9 and 10 and for receiving a support body 20 is provided.
  • the recess 19 is complete according to the embodiment disposed within the elastomer layer 17 and 18, respectively.
  • a twisted piston 103 is shown, which is also fixed by means of a feather key 111 on a shaft 113 and about a rotation axis 109 is rotatable.
  • the recesses 119 are thereby spirally introduced into the wing tips 103a, 103b, 103c, which also extend helically with respect to the shaft 113.
  • the introduced support bodies 120 shown here may be bendable or be made with a corresponding curvature.
  • the piston 103 is dreiflüglig. This is again not mandatory.
  • a plurality of pistons 103 can slide on each other.
  • a multi-winged piston (eight-winged) 203 of a cell pump is shown, which is held on a shaft 213 and rotates in the direction 207 about an axis of rotation 209.
  • the piston 203 shows a surface layer which consists entirely of a polymer and the piston 203 substantially completely.
  • recesses 219 are each formed axially parallel, which can serve to receive support bodies 220.
  • Fig. 6. another piston 303 is shown, which generally corresponds to the piston 3 in Fig. 1 substantially, however, has indentations 321 and 322 at the wing tips 303 a and 303 b, thereby a secure hold against lifting of the polymer layer 317 and To ensure an anti-rotation of the polymer layer 317.
  • wing tip 303a At the lower end in Fig. 6 (wing tip 303a) is a recess 319, which is designed as an axially parallel channel, shown before introducing a support body. A flattening of the outer polymer layer 317, due to wear, is visible here.
  • a piston 403 is shown, the recesses 419 are perpendicular to the axis of rotation 409, so that by introducing support members 420, a widening of the upper and lower boundary plane, which is perpendicular to the axis of rotation 409 is effected, which then in place or in Addition to the widening of the wing tips and a widening of the transverse surfaces is possible.
  • FIG. 4 shows the sequence of the method according to the invention for compensating for wear of the outer polymer layer.
  • the polymer layer 17 is also intact in the region of the wing tip 3a and has its full original width.
  • the recess 19 is a the diameter of the channel formed by the recess 19 corresponding support body, for example, a steel pin or a pin made of plastic, introduced.
  • the polymer layer 17 is thinned, a gap is formed between the wall 15 and the outer boundary of the piston 3.
  • the support body 20 is removed and a circumferentially expanded support body 20a is used, which by its larger diameter an expansion the recess 19 and thus also the surrounding polymer layer 17 causes, so that this again closes the resulting gap (Fig. 4c).
  • either an existing support body 20 are exchanged for an enlarged support body 20a, or it is also possible that originally no support body 20 has been vulcanized into the recess 19. Then either an existing hole can be widened by introducing one of these over an excess support body 20a, or it is only then introduced a bore, for example, 2 mm to 3 mm diameter and inserted an oversize support body 20a, for example, 10 mm to 12 mm in the recess , Due to the fact that in this method the pushing out of the diameter smaller dimensioned earlier support body 20 is omitted, such a widening of the polymer layer 17 without removal of the respective piston 3,103,203,303,403 done.
  • Threaded support bodies may be made of different materials and may be curved.
  • the support body need not have the circular cross-sectional shape shown in Fig. 4c, but may also have, for example, an oval, elliptical or other shaped peripheral shape in adaptation to the thinned area. It is also possible to provide a plurality of recesses 19 side by side, whereby the expanded area is increased overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (11)

  1. Pompe (1) comportant un ou plusieurs pistons rotatifs (3; 103; 203; 303; 403), en particulier pour transporter des milieux essentiellement liquides, dans laquelle le piston (3; 103; 203; 303; 403) présente, au moins localement, une couche de surface (17; 117; 217; 317; 417) en un polymère, en particulier en un élastomère, et un corps de support (20; 120; 220; 320; 420), caractérisée en ce qu'au moins un alésage (19; 119; 219; 319; 419) est disposé à l'intérieur de la couche de polymère, dans lequel le corps de support (20; 120; 220; 320; 420) élargissant l'alésage par son plus grand diamètre est introduit sans démontage du piston pour étirer la couche de polymère (17; 117; 217; 317; 417).
  2. Pompe selon la revendication 1, caractérisée en ce que l'évidement (19; 219; 319; 419) est formé par un canal destiné à recevoir un corps de support essentiellement en forme de barre (20; 220; 320; 420).
  3. Pompe selon la revendication 2, caractérisée en ce que le canal est situé dans la région d'une ligne d'appui du piston (3; 103; 203; 303; 403) sur une paroi (15; 16) de la chambre de pompe (2).
  4. Pompe suivant la revendication 2 ou 3, caractérisée en ce que le canal (19; 219; 319) présente une orientation essentiellement parallèle à l'axe.
  5. Pompe selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'évidement (419) s'étend essentiellement perpendiculairement à l'axe de rotation (9) du ou des piston (s) (403) et est situé dans la région de bords de piston (403c; 403d) dirigés perpendiculairement à l'axe (9) .
  6. Pompe selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle comprend un piston (3; 103; 203; 303) à plusieurs lobes et chaque lobe est pourvu d'au moins un évidement (19; 119; 219; 319) dans la région de son appui sur une paroi périphérique (15; 16) de la chambre de pompe (2).
  7. Pompe selon l'une quelconque des revendications précédentes 1 à 6, caractérisée en ce que la pompe (1) comprend deux pistons rotatifs (3; 103; 303; 403), qui glissent l'un sur l'autre.
  8. Pompe selon l'une quelconque des revendications précédentes 1 à 7, caractérisée en ce que la pompe (1) comprend au moins un piston rotatif (203) torsadé sur son tracé axial et l'évidement (219) suit une ligne d'extension radiale maximale de ce piston (203).
  9. Pompe selon l'une quelconque des revendications 1 à 8, caractérisée en ce que l'évidement (19; 119; 219; 319; 419) peut être élargi selon les besoins par l'introduction de corps de support (20; 20a; 120; 220; 320; 420) de différents diamètres.
  10. Pompe selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le corps de support (20; 20a; 120; 220; 320; 420) est formé par une tige métallique.
  11. Procédé pour compenser des usures par érosion d'une couche de polymère extérieure d'un piston de pompe, en particulier d'un piston rotatif d'une pompe transportant du liquide, caractérisé en ce que la couche de polymère est pourvue d'un alésage et un corps de support élargissant l'alésage par son plus grand diamètre est introduit dans ce dernier sans démontage du piston et on provoque ainsi un élargissement de la couche de polymère.
EP00941960A 2000-05-18 2000-05-18 Pompe a piston rotatif Expired - Lifetime EP1282777B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2000/004519 WO2001088377A1 (fr) 2000-05-18 2000-05-18 Pompe a piston rotatif

Publications (2)

Publication Number Publication Date
EP1282777A1 EP1282777A1 (fr) 2003-02-12
EP1282777B1 true EP1282777B1 (fr) 2007-08-15

Family

ID=8163945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00941960A Expired - Lifetime EP1282777B1 (fr) 2000-05-18 2000-05-18 Pompe a piston rotatif

Country Status (6)

Country Link
US (1) US6827565B1 (fr)
EP (1) EP1282777B1 (fr)
JP (1) JP2004527689A (fr)
AT (1) ATE370329T1 (fr)
DE (1) DE50014574D1 (fr)
WO (1) WO2001088377A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010012494U1 (de) * 2010-09-13 2011-12-15 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe und Drehkolben
US9383013B2 (en) 2011-08-03 2016-07-05 Lobepro, Inc. Piston with replaceable and/or adjustable surfaces
DE102013100677B4 (de) * 2013-01-23 2017-03-02 Roediger Vacuum Gmbh Drehkolbenpumpe
CA2901319C (fr) 2013-03-15 2017-09-19 Lobepro, Inc. Piston dote de surfaces remplacables et/ou reglables
DE202014001511U1 (de) 2014-02-20 2015-05-21 Hugo Vogelsang Maschinenbau Gmbh Einbringvorrichtung für Mehrschichtdüngung

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455194A (en) * 1943-11-10 1948-11-30 Rumsey Lillian Gray Rotary flexible vane pump
US2605715A (en) * 1949-02-08 1952-08-05 David O Brant Rotary pump piston
FR1209705A (fr) * 1958-08-30 1960-03-03 Pompe ou compresseur à rotor monovis courbe en matière puissamment élastique
US3078807A (en) * 1958-10-16 1963-02-26 William D Hewit Dual-action displacement pump
US2999466A (en) * 1959-09-23 1961-09-12 Ingersoll Rand Co Pump
DE2002518C3 (de) 1970-01-21 1982-04-01 Fa. Hugo Vogelsang, 4571 Bunnen Güllepumpe
JPS48104107A (fr) * 1972-04-14 1973-12-27
US3999894A (en) * 1973-04-23 1976-12-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compressor assembly
US4270440A (en) * 1979-02-22 1981-06-02 Weatherford/Dmc High pressure piston and seal
DE3324899C2 (de) 1983-07-09 1986-07-17 Maschinenfabriken Bernard Krone Gmbh, 4441 Spelle Maschine zum Ernten von Mais od. dgl. stengelartigem Erntegut
DE8602009U1 (de) * 1986-01-28 1987-07-23 Börger, Alois, 4280 Borken Rotorpumpe, insbesondere zur Förderung von Fremdkörper enthaltenden Flüssigkeiten bzw. flüssigen Dickstoffen
DE3707722A1 (de) * 1987-03-11 1988-09-29 Alois Boerger Rotorpumpe, insbesondere fuer die foerderung von feststoffe enthaltenden fluessigkeiten
US4940402A (en) * 1988-11-08 1990-07-10 Brunswick Corporation High pressure and high lift pump impeller
DE9216170U1 (de) 1992-11-27 1993-01-14 Börger, Alois, 4280 Borken Rotorpumpe, insbesondere für die Förderung von Feststoffe enthaltenden Flüssigkeiten
DE4313457C1 (de) * 1993-04-24 1994-05-11 Alois Boerger Drehkolbenpumpe,insbesondere für die Förderung von Feststoffe enthaltenden Flüssigkeiten
JPH09151875A (ja) * 1995-11-30 1997-06-10 Sanyo Electric Co Ltd 冷媒圧縮機
US5988649A (en) * 1997-05-01 1999-11-23 E. I. Du Pont De Nemours And Company Fractured seal ring

Also Published As

Publication number Publication date
DE50014574D1 (de) 2007-09-27
WO2001088377A8 (fr) 2002-07-25
EP1282777A1 (fr) 2003-02-12
WO2001088377A1 (fr) 2001-11-22
US6827565B1 (en) 2004-12-07
JP2004527689A (ja) 2004-09-09
ATE370329T1 (de) 2007-09-15

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