EP0153221B1 - Herstellungsverfahren eines geschlossenen Flügelrades - Google Patents

Herstellungsverfahren eines geschlossenen Flügelrades Download PDF

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Publication number
EP0153221B1
EP0153221B1 EP85400203A EP85400203A EP0153221B1 EP 0153221 B1 EP0153221 B1 EP 0153221B1 EP 85400203 A EP85400203 A EP 85400203A EP 85400203 A EP85400203 A EP 85400203A EP 0153221 B1 EP0153221 B1 EP 0153221B1
Authority
EP
European Patent Office
Prior art keywords
disc
blades
discs
wheel
flange
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
EP85400203A
Other languages
English (en)
French (fr)
Other versions
EP0153221A1 (de
Inventor
Georges Dousse
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Priority to AT85400203T priority Critical patent/ATE37589T1/de
Publication of EP0153221A1 publication Critical patent/EP0153221A1/de
Application granted granted Critical
Publication of EP0153221B1 publication Critical patent/EP0153221B1/de
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
    • 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 present invention relates to the production of a closed centrifugal or centripetal impeller. It applies in particular to the wheels of pumps or other centrifugal or centripetal machines in which the radial flow path of the fluid is closed.
  • the invention relates to an impeller in accordance with the preamble of claim 1.
  • Centrifugal compressors consist of a shaft carrying one or more wheels intended to compress the gas which passes through the compressor.
  • the wheels have a hub disc for mounting on the shaft and vanes attached to the disc which create a flow channel for the gas.
  • the gas sucked in at the level of the shaft, rises along the disc, driven in rotation by the blades, up to the outside diameter of the disc, having received kinetic energy from the wheel.
  • the transformation at the exit of the wheel from kinetic energy into pressure energy corresponds to compression.
  • the usual method of manufacturing these wheels can consist of milling the blades in the hub, and attaching the flange by welding to the side face of the blades.
  • the blades can also be machined in the flange, the latter then being attached by welding to the hub. They can also be made in two parts, one of the parts being machined in the hub and the other in the flange, the flange and the hub then being made integral with one another by welding. In all these embodiments, it is the weld which is used to secure the various elements of the wheel.
  • document US-A-1 919970 describes the production of a closed paddle wheel in which a disc, provided with blades, forming a hub, is assembled with two discs provided with blades and forming flanges, by means of a series of screws.
  • the invention overcomes the drawbacks of the above-mentioned methods of making wheels. It aims at a simple, rapid process, making it possible to obtain very good quality wheels capable of withstanding even difficult operating conditions.
  • the invention also relates to a wheel obtained by means of this method.
  • only one of the two discs is provided with vanes by providing studs on them and provision is made for housings corresponding to these studs in the thickness of the other disc.
  • punctual housings are provided and an angular setting is carried out before shrinking in order to allow the pins to be compared with the corresponding housings.
  • vanes are provided on each of the two discs, by providing pins on the vanes located on one of the discs and corresponding housings on the vanes located on the other disc and l 'an angular setting is carried out before shrinking in order to allow each blade to be compared with a corresponding blade of the other disc.
  • only one of the two discs is provided with vanes and these vanes are produced with a flange at their end situated at the periphery of the disc, and the second disc is produced. with a diameter such that the second disc can be kept clamped between said flanges.
  • said flanges are interconnected so as to form a rim in which the second disc can be held tight.
  • one of the two discs is provided with vanes and the second disc is produced with peripheral flanges extended by a rim such that the first disc and the vanes can be held tight respectively between the rim and the edges and an angular setting is carried out before shrinking in order to allow each blade to be compared with a corresponding edge of the second disc.
  • the invention also relates to a closed paddle wheel produced by means of any one of the abovementioned variants of the method according to the invention.
  • the wheel consists of two discs, a disc 1 forming a hub and a second disc 2 also called a flange.
  • the two discs 1 and 2 are each provided with a central bore, the and 2 ', to allow the mounting of the wheel on a shaft not shown of the machine on which the wheel is intended to be used.
  • Blades 3 are intended to create a flow channel for the gas which, drawn in at the level of the shaft, that is to say bores, rises along the disks 1 and 2, driven in rotation by the blades 3, to the outside diameter of the discs 1 and 2 having received kinetic energy from the wheel.
  • the discs 1 and 2 produce with the blades 3 channels which are each isolated from the neighboring channels.
  • two discs are first prepared, a hub 1 and a flange 2, as shown in Figures 1b, 2b, 3b and 4b. These discs are prepared by providing them with blades 3.
  • the hub 1 which carries the blades 3.
  • the hub 1 and the blades 3 have been machined from the same block of metal; we could also weld the blades 3 on the hub 1, but as we explained above, welding has certain drawbacks that we are specifically trying to avoid.
  • the hub 1 bearing blades 3 and the flange 2 are produced in such a way that they can be made integral with one another in order to constitute a closed wheel, by hooping.
  • each of the two discs 1 and 2 is provided with means capable of cooperating with corresponding means of the other disc.
  • the blades 3 carried by the hub 1 are provided with pins 4 corresponding to housings 5 machined in the thickness of the flange 2.
  • the machining of the pins 4 and of the housings 5 can be practiced circumferentially, by turning, which ensures good precision and allows a low production cost to be obtained.
  • the housings 5 can also be punctual, that is to say produced by braking only at the level of the vanes 3: this ensures continuity of the flange 2 and of the flow of gas thereon.
  • the flange 2 is previously heated to a temperature allowing its expansion but not modifying its structure, then the flange 2 is placed on the hub 1 by fitting the pins 4 into the housings 5.
  • the hub 1 and the flange 2 are made integral with one another.
  • the housings 5 and the pins 4 are provided so as to be able to fit together when the flange 2 is heated and to be under stress when the flange 2 is cooled; this constraint must be able to be supported by the metals constituting the hub 1 and the flange 2 both at rest and in operation.
  • housings 5 are punctual, it is necessary to provide an angular setting when positioning the flange 2 on the disc 1, so that the housings 5 can fit into the studs 4 located on the blades 3. This angular setting does not is not necessary if the housings 5 are made circumferentially.
  • the wheel produced in FIGS. 2a and 2b comprises a hub 1 provided with blades 3 in which the blades 3 are produced with a flange 6 at their end situated at the periphery of the hub 1.
  • the flange 2 is produced with a diameter D such that it can be kept clamped between said flanges 6.
  • the hub 1 is heated, the flange 2 is placed between the flanges 6 and the tightening occurs during cooling of the hub 1.
  • the wheel shown in Figures 3a and 3b is similar to that shown in Figures 2a and 2b except that the flanges 6 of the blades 3 are interconnected so as to form a rim 7 in which the flange 2 can be held tight.
  • the tightening of the flange 2 is thus carried out over the entire circumference of the flange instead of being exerted only at the level of the blades 3 as in the mode of FIG. 2.
  • the closed wheel is produced, it is closed not only by the flange 2 but also by the rim 7 which in fact makes an extension of the flange 2.
  • the wheel is closed only up to the diameter D.
  • the wheel shown in Figures 3a and 3b can therefore be used for compression stages more efficient than those for which one uses for example a wheel as shown in Figures 2a and 2b.
  • the flange 2 has peripheral flanges 8 extended by a rim 9 such that the hub 1 and the blades 3 carried by the hub 1 can be kept tight respectively between the rim 9 and the flanges 8.
  • This wheel is quite similar to the wheel shown in FIGS. 3a and 3b except that in this case, the flanges and the rim are carried by the flange 2 in order to enclose the hub 1 at instead of being carried by the hub 1 in order to enclose the flange 2.
  • the flanges 8 are of course located only at the level of the blades 3 while the rim 9 constitutes a circumference without discontinuity.
  • flanges 8 in fact constitute extensions of the blades 3 over the largest diameters of the wheel, such a wheel can have the same applications as the wheel described in the example of FIGS. 3a and 3b.
  • An angular setting is also necessary in order to allow the correspondence between the flanges 8 and the blades 3.
  • the wheels produced by the process according to the present invention give very satisfactory results. They are not likely to deteriorate during operation, even if they are subjected to vibrations when the pressure is high.
  • the minimum tightening of 2 ° which must exist between the hub and the flange of a centrifugal wheel produced in accordance with Figures 3a and 3b, with an outside diameter of 520 mm and intended to rotate at 13,115 rpm ( conventional range for a centrifugal compressor) is very easily achieved by the method according to the invention.
  • One or the other of the variants of the method according to the invention can be chosen, according to the constraints that the wheel must support: the mode of FIG. 1 is for example very resistant to vibrations and can be used for high pressures. .
  • the process for producing the wheels according to the invention is simple and rapid: only heating between 200 and 300 ° C. of the flange or of the hub is necessary; a stress relieving treatment is avoided.
  • the assembly of the wheel does not require the presence of personnel as qualified as for a welded wheel and its assembly is very fast. The time taken to produce the wheels is therefore short and the cost price is not very high.
  • machining of the means provided on each of the discs to cooperate with corresponding means of the other disc in order to allow hooping is carried out in a simple manner: for example to produce the lugs and the housings of the wheel mode shown in the figure 1, digital control is used: the same strip is used to produce on the one hand the tenons 4 of the blades 3 and the housings formed in the flange 2. It is of course necessary to provide for the housings 5 slightly offset with respect to the tenons 4, for the purpose of tightening.
  • the production method according to the invention as well as the wheels obtained by this process can be used for all pumps or other centrifugal or centripetal machines in which the radial flow path of the fluid is closed, without limitation.
  • the blades 3 are integral with the hub 1 before shrinking but the blades 3 can also be integral with the flange 1 or be made in two parts, one integral with the hub 1 and the other integral with the flange 2, without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (7)

1. Verfahren zur Herstellung eines geschlossenen Flügelrades, wonach eine erste Scheibe (1) erstellt wird, die eine Nabe bildet, und eine zweite Scheibe (2) bzw. ein Flansch, indem die Scheiben mit Flügeln (3) versehen werden und die beiden mit Flügeln (3) versehenen Scheiben (1 und 2) aneinander befestigt werden und wobei auf einer der Scheiben (1 und 2) vorspringende Elemente - (4, 6, 7, 8, 9) vorgesehen werden, die mit entsprechenden Elementen (2, 5) auf der anderen Scheibe zusammenwirken, die geeignet sind, diese vorspringenden Elemente (4, 6, 7, 8, 9) unter Klemmung aufzunehmen und wobei die Scheiben (1 und 2) derart zusammengesetzt werden, daß ein Eingreifen der vorspringenden Elemente einer Scheibe (4, 6, 7, 8, 9) mit den Elementen (2, 5) der anderen Scheibe erreicht wird, dadurch gekennzeichnet, daß die Klemmung durch eine Frettage erhalten wird, die durch vorhergehendes Aufheizen einer der beiden Scheiben (1 oder 2) erreicht wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Flügel (3) einer der beiden Scheiben mit Zapfen (4) versehen werden und diesen Zapfen (4) entsprechende Lager (5) in der Dicke der anderen Schicht vorgesehen sind.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Lager (5) punktuell vorgesehen sind und dadurch, daß vor der Frettage eine winkelmäßige Justierung erfolgt. um die Zapfen (4) gegenüber den entsprechenden Lagern (5) auszurichten.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß jede der beiden Scheiben (1 und 2) mit Flügeln (3) versehen werden, indem Zapfen (4) auf den Flügeln (3) vorgesehen werden, die auf einer der Scheiben (1 oder 2) angeordnet sind und indem entsprechende Lager auf den Flügeln (3) vorgesehen werden, die auf der anderen Scheibe (1 oder 2) vorgesehen sind, und dadurch, daß eine Winkeljustierung vor der Frettage erfolgt, um das Gegenüberstellen jedes Flügels (3) mit dem entsprechenden Flügel auf der anderen Scheibe (3) zu ermöglichen.
5. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß nur eine der beiden Scheiben mit Flügeln versehen wird und dadurch, daß diese Flügel mit einem Rand (6) an ihrem Ende versehen werden, das an der Peripherie der Scheibe gelegen ist und dadurch, daß die zweite Schicht mit einem Durchmesser (D) hergestellt wird, der so gewählt ist, daß die zweite Scheibe zwischen den Rändern (6) eingeklemmt gehaltert werden kann.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Ränder (6) so untereinander verbunden sind, daß diese eine Felge (7) bilden, in der die zweite Scheibe geklemmt gehaltert werden kann.
7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß nur eine der beiden Scheiben mit Flügeln (3) versehen wird und dadurch, daß die zweite Scheibe mit Umfangsrändern (8) versehen ist, die durch eine Felge (9) verlängert sind, derart, daß die erste Scheibe und die Bügel (3) jeweils zwischen der Felge (9) und den Rändern (8) geklemmt gehaltert werden können und dadurch, daß eine Winkeljustierung vor der Frettage erfolgt, um das Gegenüberstellen eines jeden Flügels (3) mit dem entsprechenden Rand (8) der zweiten Scheibe zu ermöglichen.
EP85400203A 1984-02-10 1985-02-07 Herstellungsverfahren eines geschlossenen Flügelrades Expired EP0153221B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400203T ATE37589T1 (de) 1984-02-10 1985-02-07 Herstellungsverfahren eines geschlossenen fluegelrades.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8402047A FR2559544B1 (fr) 1984-02-10 1984-02-10 Procede de realisation d'une roue a aubes fermee et roue obtenue au moyen de ce procede
FR8402047 1984-02-10

Publications (2)

Publication Number Publication Date
EP0153221A1 EP0153221A1 (de) 1985-08-28
EP0153221B1 true EP0153221B1 (de) 1988-09-28

Family

ID=9300932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400203A Expired EP0153221B1 (de) 1984-02-10 1985-02-07 Herstellungsverfahren eines geschlossenen Flügelrades

Country Status (4)

Country Link
EP (1) EP0153221B1 (de)
AT (1) ATE37589T1 (de)
DE (1) DE3565301D1 (de)
FR (1) FR2559544B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2533605C2 (ru) * 2013-03-12 2014-11-20 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" Центробежное рабочее колесо

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113831A1 (de) * 1991-04-27 1992-10-29 Klein Schanzlin & Becker Ag Geteiltes laufrad
DE59208865D1 (de) * 1992-12-08 1997-10-09 Asea Brown Boveri Stabilierungseinrichtung zur Kennfelderweiterung eines Verdichters
US5328332A (en) * 1993-05-25 1994-07-12 Chiang Swea T Wheel fan of range hood
US5588803A (en) * 1995-12-01 1996-12-31 General Motors Corporation Centrifugal impeller with simplified manufacture
DE19746850A1 (de) 1997-10-23 1999-04-29 Wilo Gmbh Laufrad aus Blech
US6523995B2 (en) * 2001-03-23 2003-02-25 Chemineer, Inc. In-tank mixing system and associated radial impeller
CN101526088A (zh) * 2008-03-03 2009-09-09 普拉德研究及开发股份有限公司 离心泵用的叶轮
RU2568358C1 (ru) * 2014-05-22 2015-11-20 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" Центробежное рабочее колесо
GB2574221A (en) * 2018-05-30 2019-12-04 Cnc Subcon Services Ltd Impeller and method of manufacture
RU190999U1 (ru) * 2019-04-24 2019-07-18 Акционерное общество (АО) "Научно-исследовательский институт "Лопастных машин" ("НИИ ЛМ") Рабочее колесо центробежного насоса
DE102019206548A1 (de) * 2019-05-07 2020-11-12 Mahle International Gmbh Fluidpumpe
RU2731465C1 (ru) * 2019-11-07 2020-09-03 Акционерное общество "Гидрогаз" (АО "Гидрогаз") Рабочее колесо центробежного насоса (варианты)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919970A (en) * 1933-02-07 1933-07-25 Gen Electric Impeller
FR2312671A1 (fr) * 1975-05-30 1976-12-24 Creusot Loire Procede de realisation de roue a aubes centrifuge et roue obtenue par ce procede

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2533605C2 (ru) * 2013-03-12 2014-11-20 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" имени С.П. Королева" Центробежное рабочее колесо

Also Published As

Publication number Publication date
FR2559544B1 (fr) 1988-07-08
DE3565301D1 (en) 1988-11-03
EP0153221A1 (de) 1985-08-28
ATE37589T1 (de) 1988-10-15
FR2559544A1 (fr) 1985-08-16

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