EP0511518B1 - Rouet partitionné - Google Patents

Rouet partitionné Download PDF

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Publication number
EP0511518B1
EP0511518B1 EP92105851A EP92105851A EP0511518B1 EP 0511518 B1 EP0511518 B1 EP 0511518B1 EP 92105851 A EP92105851 A EP 92105851A EP 92105851 A EP92105851 A EP 92105851A EP 0511518 B1 EP0511518 B1 EP 0511518B1
Authority
EP
European Patent Office
Prior art keywords
impeller
vane
parts
blade
dividing
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
EP92105851A
Other languages
German (de)
English (en)
Other versions
EP0511518A1 (fr
Inventor
Karlheinz Becker
Peter Milla
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of EP0511518A1 publication Critical patent/EP0511518A1/fr
Application granted granted Critical
Publication of EP0511518B1 publication Critical patent/EP0511518B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly

Definitions

  • the invention relates to an impeller according to the preamble of the main claim.
  • DE-PS 550 461 describes the problem of how the inlet edges of the blades can be finished in the case of impellers of small turbomachines.
  • the impeller is divided and the blades are formed as an integral part of the impeller cover disk on the suction or pressure side.
  • the blade channels are closed by a cover plate part in the outlet area of the impeller.
  • the remaining cover plate part is part of the other impeller part.
  • the transmission of forces then takes place through a corresponding approach in the connection area between the suction or pressure side cover plate part.
  • the impeller parts cannot be completely machined due to their design.
  • a split impeller is also known from GB-A 537 727.
  • the individual blades arranged between the cover disks can be wholly or partly part of a cover disk.
  • the cover plate parts are held together by rivets or screws provided in the area of the blades. This measure limits the Range of possible blade shapes considerably and requires unnecessarily large blade thicknesses.
  • the invention has for its object to develop a cutting, pressing or casting technically manufactured impeller in a closed and divided design. This object is achieved according to the features of the main claim.
  • at least two blades are divided in length.
  • the impeller parts to be connected are fitted by means of a form-fitting plug connection. (The impeller parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.
  • An embodiment of the invention provides for this that the part plane dividing the blades has no straight line.
  • An arcuate, S-shaped, Z-shaped, meandering or similarly shaped course of the partial plane of the blades is advantageous. This has the advantage that not only is the two parts centered with respect to one another, but that, due to the part plane profile, an anti-rotation device is also generated. For assembly, it is sufficient to simply plug the parts into one another. Elaborate centering, dowel pins and connecting elements, as were previously required in multi-stage turbomachines, are completely eliminated. When assembling such a turbomachine, the centering and positioning of the individual impeller parts can only be placed in the connection area of the divided blades.
  • the problem has arisen when machining an impeller in its entry area. If the distance between the blades is very small, the blade channels can only be produced with narrow, thin end mills and are therefore only time-consuming and risky.
  • the partial plane can be placed in the case of small channel cross sections so that the distance between the beginning or end of the blade and the partial plane of the blade is chosen to be large and a milling cutter with a large diameter for cheap manufacture easily passed between the blade parts of the respective impeller part and so the blade contour can be worked out.
  • the entire centering of the parts of the impeller to be connected takes place via the parting plane in the area of the blades composed of parts. This also ensures that the components are prevented from rotating with one another. For the assembly and manufacture of such a turbomachine, this means a serious simplification, since it is thus only necessary to simply plug the individual components into one another. In addition, it can thus be adapted to different performance ranges in a simplicity that can no longer be surpassed. By changing the blade width, the impeller can be adapted to the desired performance data during manufacture. This is possible in machining by simple program changes.
  • the blade parts having a blade start are part of the one impeller part, and the supplementary blade parts having the corresponding blade ends are part of the other impeller part.
  • Each impeller part has two wall surfaces from the blade channel, which stand on one another and enclose an angle between them.
  • the blade channels delimited by blades are formed for a pumped medium.
  • the blades are, as it were, divided in their blade length, the separation point running transversely to the blade length.
  • the invention generally offers this advantage through the blade division.
  • the form-fitting plug connection is attached to at least two blades. The remaining blades can alternately be part of the impeller parts or cover disks and rest sealingly against them.
  • the example of an impeller of a turbomachine shown in FIG. 1 belongs to a multi-stage centrifugal pump for large delivery capacities.
  • One impeller part (1) consists of the retainer (2) and the pressure-side cover plate (3).
  • the blade parts (5) provided with blade ends (4) are an integral part of the pressure-side cover plate (3), and can be worked out from the solid.
  • the holder (2) shown here is also an integral part of the pressure-side cover plate (3), it is easily possible to design the holder (2) as a separate component.
  • the other impeller part (6) consists of the suction-side cover plate (7) with the fixedly connected blade parts (7) having the blade tips (8).
  • the separation planes (A, B and C) are drawn in between the two impeller parts (1, 6) with double line width.
  • the parting planes (A and B) correspond to the wall surface course of the cover disks (3, 7) delimiting the blade channels.
  • the parting plane (C) divides the blade length.
  • the course of the blade division can be seen from FIG. 2, which corresponds to a section along the section line drawn in FIG. 1.
  • the parting plane (C) divides the blades into two parts and runs in the axial direction. If necessary, any other course of the parting plane (C) is also possible. In this exemplary embodiment, it has an S-shaped course which both centers the parts to be joined together and at the same time secures them against rotation. This form-fitting connection can also have any other suitable course which ensures the same function.
  • the blade channels (10) of the impeller are formed between the blade parts (5, 9) which are arranged next to one another over the circumference.
  • blade parts on the impeller part which carries them, after which a blade part (9) with blade start (8) is alternately followed by a blade part (5) with blade end (4). This depends on the individual case and the shape of the blade channels (10). If an assignment of the parts to be joined together in a certain position is required, this can be brought about by a different design of the parting plane or a special arrangement of blade parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Recrystallisation Techniques (AREA)

Claims (4)

  1. Roue en version fermée et divisée pour turbo machines à un ou plusieurs étages, dans laquelle sont placées entre le disque de recouvrement (1, 6) côté aspiration et côté pression des aubes (5, 9) servant au guidage de l'écoulement, dans laquelle les aubes sont divisées dans le sens de leur longueur, dans laquelle une pièce de roue (1) est munie d'un disque de recouvrement (3) limitant les canaux de l'aube (10) et de pièces d'aubes (5) et une autre pièce de roue (6) est munie d'un disque de recouvrement (7) opposé, limitant les canaux des aubes (10) ainsi que de pièces d'aubes (9) complémentaires, dans laquelle sont prévus entre les pièces de roues (1, 6) à relier entre elles au moins trois plans partiels (A, B, C), dont deux plans partiels (A, B) sont placés dans la surface des parois des plans des disques de recouvrement qui limitent les canaux des aubes (10), lesquels plans présentant un écart entre eux et étant reliés entre eux par le troisième plan partiel (C) placé en direction de l'axe médian et divisant les aubes, caractérisée en ce que les pièces de roue (1, 6) sont reliées entre elles par un enfichage, à forme adéquate, bloquant la rotation et situé dans la zone de la division de l'aube.
  2. Roue selon la revendication 1 caractérisée en ce que le plan partiel (C) qui divise les aubes n'est pas rectiligne.
  3. Roue selon la revendication 1 ou 2 caractérisée en ce qu'une pièce de roue (6) est munie de pièces d'aubes (9) munies de d'entrées d'aubes (8) et que l'autre pièce de roue (1) fonctionnant avec elle est munie de pièces d'aubes (5) équipées d'extrêmités d'aubes (4) complémentaires.
  4. Roue selon une des revendications 1 à 3 caractérisée en ce qu'une pièce de roue est équipée de pièces de roues (9, 5) présentant des entrées de roue (8) et des extrêmités de roues (4) placées en alternance et que l'autre pièce de roue travaillant avec elle est munie de pièces d'aubes (9, 5) présentant des extrêmités d'aubes (4) et des entrées d'aubes (8) complémentaires et placées en alternance.
EP92105851A 1991-04-27 1992-04-04 Rouet partitionné Expired - Lifetime EP0511518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4113831A DE4113831A1 (de) 1991-04-27 1991-04-27 Geteiltes laufrad
DE4113831 1991-04-27

Publications (2)

Publication Number Publication Date
EP0511518A1 EP0511518A1 (fr) 1992-11-04
EP0511518B1 true EP0511518B1 (fr) 1995-09-06

Family

ID=6430508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105851A Expired - Lifetime EP0511518B1 (fr) 1991-04-27 1992-04-04 Rouet partitionné

Country Status (3)

Country Link
EP (1) EP0511518B1 (fr)
AT (1) ATE127572T1 (fr)
DE (2) DE4113831A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013432A1 (de) 2008-03-10 2009-09-17 Man Turbo Ag Deckscheibe für ein geschlossenes Laufrad
RU2459980C1 (ru) * 2011-03-23 2012-08-27 Закрытое акционерное общество "Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров им. В.Б. Шнеппа" Способ изготовления рабочих колес центробежных копрессоров

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE550461C (de) * 1932-05-11 Aeg Mehrteiliges Laufrad fuer Kreiselpumpen oder -geblaese
US1849557A (en) * 1929-06-12 1932-03-15 M T Davidson Company Centrifugal pump
GB537727A (en) * 1940-04-03 1941-07-03 Coventry Climax Eng Ltd Improvements in centrifugal pumps
DE858284C (de) * 1943-02-27 1952-12-04 Maschf Augsburg Nuernberg Ag Abgedecktes Laufrad fuer Kreiselradmaschinen
DD95761A1 (fr) * 1972-03-16 1973-02-12
SU885627A1 (ru) * 1978-01-03 1981-11-30 Предприятие П/Я М-5095 Рабочее колесо грунтового насоса
SU1059221A1 (ru) * 1982-05-25 1983-12-07 Предприятие П/Я А-3513 Рабочее колесо осерадиальной турбомашины
FR2559544B1 (fr) * 1984-02-10 1988-07-08 Creusot Loire Procede de realisation d'une roue a aubes fermee et roue obtenue au moyen de ce procede

Also Published As

Publication number Publication date
EP0511518A1 (fr) 1992-11-04
ATE127572T1 (de) 1995-09-15
DE4113831A1 (de) 1992-10-29
DE59203520D1 (de) 1995-10-12

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