WO2002035686A1 - Moteur electrique a regime eleve - Google Patents

Moteur electrique a regime eleve Download PDF

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Publication number
WO2002035686A1
WO2002035686A1 PCT/IB2001/001977 IB0101977W WO0235686A1 WO 2002035686 A1 WO2002035686 A1 WO 2002035686A1 IB 0101977 W IB0101977 W IB 0101977W WO 0235686 A1 WO0235686 A1 WO 0235686A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
machine according
radial
blading
guide ring
Prior art date
Application number
PCT/IB2001/001977
Other languages
German (de)
English (en)
Inventor
Ralf Jakoby
Original Assignee
Alstom (Switzerland) Ltd.
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 Alstom (Switzerland) Ltd. filed Critical Alstom (Switzerland) Ltd.
Priority to AU2002210807A priority Critical patent/AU2002210807A1/en
Publication of WO2002035686A1 publication Critical patent/WO2002035686A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • the present invention relates to the field of high-speed electrical machines. It relates to a high-speed electrical machine according to the preamble of claim 1.
  • motors for driving pipeline compressors which are integrated in the natural gas pipeline and through which the pumped medium (methane) flows under a pressure between 40 and 70 bar. In this case, cooling of the rotor interior may not be necessary.
  • the entry into the rotor is usually very simple.
  • the air is either directed through axial, cylindrical inlet openings into the inside of the rotor or the flow is pre-twisted through radial, straight struts to reduce the imprinted losses. This type of air flow generates high entry losses at very high peripheral speeds.
  • the object is achieved by the entirety of the features of claim 1.
  • the essence of the invention is to allow the front supply of the cooling medium to take place via at least one gas guide ring integrated in the rotor, which comprises guide and acceleration means acting in the radial direction.
  • the cooling medium is guided outwards with approximate acceleration to the circumferential speed of the rotor and can then enter the axial cooling channels with little loss.
  • the pressure in the cooling medium is increased by the control and acceleration means, so that the rotor, with a suitable design, self-ventilates or even generates an excess pressure that can be used in subsequent components.
  • the guide and acceleration means acting in the radial direction comprise radial blading.
  • a gas guide ring which acts in a similar way to the compressor impeller of a turbocharger, already brings about a significant reduction in losses and a noticeable increase in pressure with a comparatively simple construction.
  • a further improvement can be achieved if an additional axial blading is arranged in the flow direction before the radial blading.
  • the structure of the gas guide ring can be simplified if, according to another preferred embodiment of the invention, the guide and acceleration means acting in the radial direction comprise radial struts or split radial struts.
  • the machine is constructed in such a way that the rotor active part is held together on the end face by press plates and has short-circuit disks which are arranged outside the press plates, it is particularly advantageous if the gas guide ring is arranged between one of the press plates and the corresponding short-circuit disk, and if an existing one additional axial blading is arranged between the corresponding short-circuiting disc and the rotor shaft.
  • Fig. 1 shows a first preferred in a schematic longitudinal section
  • FIG. 2 shows a perspective view of one end face of the rotor according to FIG. 1 with the radial blading of the gas guide ring, which is shown without a cover disk;
  • FIG. 3 shows a representation, comparable to FIG. 2, of a rotor with a gas guide ring arranged between the press plate and the external short-circuit disk with separate axial and radial blading;
  • FIG. 4 the rotor according to FIG. 3 with the short-circuit disc omitted;
  • FIG. 5a-e in schematic longitudinal section different configurations of the gas guide ring according to the invention (partial figures 5 (b) to 5 (e)) compared to a rotor without a guide device (partial figure 5 (a)); and
  • FIG. 6 shows the calculated pressure generation for the 5 shown in FIG. 5
  • FIG. 1 shows an example of an asymmetrically cooled and axially flowed rotor 10 of a high-speed electrical machine in a schematic longitudinal section.
  • the rotor 10 comprises a rotor shaft 11 on which a rotor active part 12 is arranged.
  • the rotor active part 12 is held together from both ends by screwed pressure plates 13, 14, on the inside of which a short-circuiting disk 15, 16 is arranged.
  • a plurality of axial cooling channels 17, 18 run through the rotor active part 12 between the rotor shaft and the outer circumference of the rotor active part in the axial direction.
  • the cooling air (or more generally: the gaseous cooling medium) enters on the left side through an inlet opening 21 into a gas guide ring 25 which is designed as an impeller provided with radial blading 20, integrated in the rotor and delimited on the outside by a cover disk 19.
  • a gas guide ring 25 which is designed as an impeller provided with radial blading 20, integrated in the rotor and delimited on the outside by a cover disk 19.
  • the gas guide ring 25 operates on the one hand in accelerating the flow medium (cooling medium) to the circumferential speed of the rotor 10 as uniformly as possible, so that the relative speed of the fluid and the rotor is thereby reduced.
  • the pressure losses that occur are generally proportional to the square of this speed difference and are minimized in this way.
  • Another very important property of the gas guide ring 25 is the increase in the pressure in the flow medium, so that the rotor 10, with a suitable design, self-ventilates or even generates an excess pressure which can be used in subsequent components.
  • the structural design of the gas guide ring 25 from FIG. 1 is comparable to the compressor impeller of a turbocharger; however, in contrast to this, there is no direct outflow from the blading into a stationary component, but the fluid flows into the axial cooling channels 17, 18 in the rotor 10.
  • FIG. 2 shows a possible design (purely radial shape) of the gas guide ring 25.
  • the cover plate 19 for encapsulating the impeller has been omitted.
  • the diagonal version (not shown), in which an axial inflow and a radial outflow are realized within a single blading.
  • a purely axial row of blades 22 followed by a purely radial row of blades 20 can be a sensible solution (FIGS. 3, 4). This is particularly the case with machines with an external short-circuiting disk 15 '(FIG. 3).
  • the area below the short-circuit disk (the short-circuit ring) 15 ' can be used for the axial blading 22 and the annular space between the short-circuit disk 15' and the press plate for the radial blading 20.
  • a gas guide ring 25 with purely radial blading 20 (FIG. 5 (d); with two different blade angles), and
  • a gas guide ring 25 with axial and radial blading 22 or 20 (FIG. 5 (e); each with two different blade angles).
  • the results of the study apply to a speed of 12,000 rpm and an outer rotor diameter of 460 mm and are summarized in a bar chart in FIG. 6.
  • the static pressure difference between an annular inlet plenum and the outlet cross section at the end of the rotor cooling channels (17, 18 in FIG. 1) is shown for the configurations examined for a constant cooling air mass flow.
  • the bars (A) and (C) relate to a configuration according to FIG. 5 (e) with two different ones Blade angles
  • the bars (B) and (D) relate to a configuration according to FIG. 5 (d) with two different blade angles
  • the bar (E) relates to the configuration according to FIG. 5 (a) without guide device
  • the Bars (F) and (G) refer to the configurations according to FIGS. 5 (c) and 5 (b) with radial divided or undivided struts 24 and 23, respectively.
  • the static pressure in the outlet cross section is slightly higher (variants with straight struts; bars (F) and (G)) or significantly higher (bars (B) and (D) with radial blading and bars (A) and ( C) with radial and axial blading) than in the inlet cross-section outside the rotor.
  • the best bladed configuration (A) creates a six-fold excess pressure compared to the straight and split strut impeller (F).
  • the rotor 10 can be designed as a self-ventilating component with a suitable design of the gas guide ring 25 and is even able to generate an excess pressure. This can bring about considerable advantages for the overall system, since a possibly existing external fan can be dimensioned much smaller or can sometimes be omitted if the rotor 10 contributes to the pressure build-up.

Abstract

L'invention concerne un moteur électrique à régime élevé, notamment sous forme de moteur asynchrone, qui comprend un rotor (10) monté rotatif au moyen d'un arbre rotorique (11), ledit rotor étant muni d'une partie active rotorique (12) et étant refroidi par l'intermédiaire de canaux de refroidissement (17, 18) axiaux montés entre l'arbre rotorique (11) et la périphérie extérieure de la partie active rotorique (12). Un milieu de refroidissement gazeux, notamment de l'air de refroidissement est acheminé jusqu'auxdits canaux de refroidissement, depuis au moins une face frontale du rotor (10). Dans ce type de moteur, on obtient un meilleur refroidissement du fait que l'alimentation frontale en milieu de refroidissement s'effectue par l'intermédiaire d'au moins une bague de guidage du gaz (25) intégrée dans le rotor (10), qui comprend des éléments de guidage et d'accélération agissant dans le sens radial.
PCT/IB2001/001977 2000-10-23 2001-10-23 Moteur electrique a regime eleve WO2002035686A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002210807A AU2002210807A1 (en) 2000-10-23 2001-10-23 High-speed electric machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000152426 DE10052426A1 (de) 2000-10-23 2000-10-23 Schnelllaufende elektrische Maschine
DE10052426.5 2000-10-23

Publications (1)

Publication Number Publication Date
WO2002035686A1 true WO2002035686A1 (fr) 2002-05-02

Family

ID=7660701

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/001977 WO2002035686A1 (fr) 2000-10-23 2001-10-23 Moteur electrique a regime eleve

Country Status (3)

Country Link
AU (1) AU2002210807A1 (fr)
DE (1) DE10052426A1 (fr)
WO (1) WO2002035686A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410380A (en) * 2000-11-30 2005-07-27 Richard Julius Gozdawa Air-cooled electric generator or motor, eg of gas turbomachinery
CN103178633A (zh) * 2013-04-19 2013-06-26 昆山聚贝机械设计有限公司 珠磨机转子外体冷却结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062540A1 (de) 2007-12-20 2009-06-25 Sycotec Gmbh & Co. Kg Elektromotor beziehungsweise Generator
DE102019119048A1 (de) * 2019-07-15 2021-01-21 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Erzeugen einer Fluidströmung in einem Elektromotor sowie Einhausung zum Leiten dieser Strömung zu einer Wärmequelle des Elektromotors
FR3126566A1 (fr) * 2021-08-25 2023-03-03 Alstom Transport Technologies Moteur électrique refroidi par air

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH98624A (de) * 1922-01-07 1923-04-02 Oerlikon Maschf Gebläse.
DE2401588A1 (de) * 1973-01-22 1974-08-01 Hitachi Ltd Belueftungseinrichtung fuer eine umlaufende elektrische maschine
JPS51110605A (ja) * 1975-03-24 1976-09-30 Hitachi Ltd Arumikyasutokaitenshi
EP0575763A1 (fr) * 1992-06-20 1993-12-29 Robert Bosch Gmbh Roue pour un ventilateur radial
US6091168A (en) * 1998-12-22 2000-07-18 Hamilton Sundstrand Corporation Rotor for a dynamoelectric machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8102695A1 (es) * 1979-06-18 1981-02-16 Gen Electric Mejoras en maquinas dinamoelectricas bipolares teniendo vi- bracion reducida
US5144175A (en) * 1991-05-15 1992-09-01 Siemens Energy & Automation, Inc. Cooling fan for electric motors
DE19653839A1 (de) * 1996-12-21 1998-06-25 Asea Brown Boveri Rotor eines Turbogenerators mit direkter Gaskühlung
US5811899A (en) * 1997-01-28 1998-09-22 General Signal Corporation Small electric motor with airflow guide structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH98624A (de) * 1922-01-07 1923-04-02 Oerlikon Maschf Gebläse.
DE2401588A1 (de) * 1973-01-22 1974-08-01 Hitachi Ltd Belueftungseinrichtung fuer eine umlaufende elektrische maschine
JPS51110605A (ja) * 1975-03-24 1976-09-30 Hitachi Ltd Arumikyasutokaitenshi
EP0575763A1 (fr) * 1992-06-20 1993-12-29 Robert Bosch Gmbh Roue pour un ventilateur radial
US6091168A (en) * 1998-12-22 2000-07-18 Hamilton Sundstrand Corporation Rotor for a dynamoelectric machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410380A (en) * 2000-11-30 2005-07-27 Richard Julius Gozdawa Air-cooled electric generator or motor, eg of gas turbomachinery
GB2410380B (en) * 2000-11-30 2005-08-31 Richard Julius Gozdawa Rotor for electric generator or motor
CN103178633A (zh) * 2013-04-19 2013-06-26 昆山聚贝机械设计有限公司 珠磨机转子外体冷却结构

Also Published As

Publication number Publication date
AU2002210807A1 (en) 2002-05-06
DE10052426A1 (de) 2002-05-02

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