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EP2844872A1 - Dispositif servant à produire, améliorer et stabiliser le vide dans le carter d'une masse d'inertie - Google Patents

Dispositif servant à produire, améliorer et stabiliser le vide dans le carter d'une masse d'inertie

Info

Publication number
EP2844872A1
EP2844872A1 EP12716234.5A EP12716234A EP2844872A1 EP 2844872 A1 EP2844872 A1 EP 2844872A1 EP 12716234 A EP12716234 A EP 12716234A EP 2844872 A1 EP2844872 A1 EP 2844872A1
Authority
EP
European Patent Office
Prior art keywords
cold surface
vacuum
flywheel
cold
housing
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Withdrawn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
EP12716234.5A
Other languages
German (de)
English (en)
Inventor
Walter WOLFGANG
Günther SIKLER
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.)
Bilfinger Noell GmbH
Original Assignee
Babcock Noell 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 Babcock Noell GmbH filed Critical Babcock Noell GmbH
Publication of EP2844872A1 publication Critical patent/EP2844872A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
    • F04B37/08—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means by condensing or freezing, e.g. cryogenic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/55—Flywheel systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
    • F16C32/0438—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part with a superconducting body, e.g. a body made of high temperature superconducting material such as YBaCuO

Definitions

  • the invention relates to a device for producing, improving and stabilizing the vacuum in the housing of a flywheel according to the features of the preamble of the first claim.
  • the device and its arrangement are used to manufacture, improve and
  • the invention is suitable for all systems which have a component which requires high cooling to a temperature which is below the temperature at which the portions of the ambient air begin to freeze out.
  • These components may be, for example, superconducting elements such as bearings or power supply.
  • Components are either so-called cryocooler or reservoirs with liquefied gas as a source of cold, the components usually via a line cooling, or so-called heat pipes are connected, or can be introduced directly into the liquefied gas.
  • a cold trap for the production, improvement and stabilization of a vacuum.
  • a vacuum is created by using a common type vacuum pump. This can either remain connected for the entire operating period, or it is disconnected from the system after the vacuum has been created and maintained.
  • CONFIRMATION COPY was attached to the housing, cooled to a low temperature. As a result, the air in the system is sucked into this area and freezes there on the walls, as in
  • DE19632123A 1 or DE10331201A 1 is described and shown. This creates a vacuum. Since only the motor moves in the cryocooler, so the vibration can be reduced. These devices can be purchased as standard products.
  • the aim of the invention is therefore to develop a device in which a negative pressure or vacuum is generated, improved and stabilized in the housing of a high-speed machine passively using a machine own cold source, without a higher technical or economic effort and their own pump power in a fault does not depend on the rotational speed of the rotor.
  • This object is achieved by a device according to the features of the first
  • the subclaims reflect advantageous embodiments of the invention.
  • the invention is a cold trap which uses the same effect as creating so-called cryopumps to create, improve and stabilize a vacuum.
  • a cooled surface in the machine housing is arranged, which is cooled to temperatures below which first portions of the air make a phase transition.
  • parts such as gas particles of the residual gas in the container freeze on this surface.
  • This effect supports the pressure decrease of the residual gas, which already results from the sole cooling of the gas.
  • the further immobilization of these gas components further reduces the pressure in the overall system.
  • immobilization or freezing is Here, the deposition of gas components on the cold surface meant either as a solid or as a liquid drop.
  • the cold surface can basically be arranged at any appropriate point in the vacuum.
  • an arrangement of the cold surface over a part or over the entire circumference of the flywheel can take place.
  • flywheel takes place. It is particularly advantageous if the width of the cold surface is twice the width of the flywheel.
  • Another advantageous arrangement of the cold surface provides for arranging these close to the HTS bearing elements. For example, the cold surface directly at the HTS bearing elements.
  • Cool mount the HTS bearing elements be arranged. It is advantageous to arrange a plurality of cold surfaces on the cooling enclosure of the HTS bearing elements. This arrangement can take place around the HTS bearing element in the region of the magnetic bearing / rotor unit on both sides of the flywheel and at both ends of the shaft of the flywheel.
  • Equally advantageous is an arrangement of the cold surface in a generator with superconducting power supply, wherein the cold surface is then advantageously carried out at the cooling inclusion of the superconducting element at the cold source, which may be in the region of the superconducting power supply and the cryocooler.
  • the cold surface on its back with an insulation.
  • suitable materials can be selected.
  • the cold surface is arranged wholly or partially relative to the peripheral surface of the flywheel, it is advantageous to choose the length of the cold surface so that incident and precipitating gas particles, which are accelerated by the flywheel, reach the cold surface. It can be assumed that the gas particles advantageously leave within an angular range between 120 and 150 degrees from the surface of the flywheel in the direction of the surface of the flywheel.
  • the temperature of the cold surface is in an interval of about 100 Kelvin to the operating temperature of the superconducting element.
  • the area in which superconductivity is detected is below about 120 Kelvin (150 degrees minus).
  • the temperature at which superconductors are operated is usually at most 80 Kelvin (200 degrees minus). This can usually by the for
  • the size is ultimately determined by the available temperature and the pump power to be generated.
  • a cooling can be done by its own source of cold as the connection to the cryocooler or a chamber for liquid nitrogen. It is advantageous to thermally bond the device either to an already cooled component, such as an HTS bearing, or directly to its cold source.
  • the connection of the cold surface to a cold source can take place via a means which either resorts to a conductive heat transport, such as e.g. a copper strip, or on a convective heat transport, as he is, for example, so-called.
  • Heat pipes underlying.
  • the use of the thermoacoustic effect is also possible.
  • the advantageous position of the cooled surface is in the plane of the flywheel.
  • the area is slightly higher than the height of the flywheel interpreted to account for the scattering of the gas particles or particles parallel to the axis of rotation.
  • the height is determined by the distance of the cold surface to the outer wall of the flywheel. In general, the height of the cold surface should be about 1, 25 to 3 times the height of the flywheel.
  • This surface does not have to be formed as a ring, but can also be interrupted, a ring segment and arranged only in a few places in this plane.
  • the surface may also be C-shaped, with the opening facing the flywheel.
  • Other embodiments include artificially enlarging the cooled surface by roughening it, incorporating grooves, or other patterns.
  • Another embodiment would be the introduction of vertical or horizontal cylinder, also to increase the surface.
  • the invention has the advantage that it is a passive system that requires no further control from the outside.
  • the device can utilize existing resources in the system and, in the event of an unwanted intrusion of external gases, provides some security as it can delay a sudden loss of vacuum. Thus, measures to protect the system can be initiated. It also provides a cheaper alternative to devices that need to be permanently attached to the system.
  • Figure 1 Schematic representation of a flywheel storage with superconducting
  • Figure 2 Schematic representation of a generator with superconducting
  • Figure 3 Schematic representation of the flywheel accumulator with cold surface, wherein the
  • HTS bearings are cooled with liquid nitrogen and the cold surface and the
  • Chambers are connected with liquid nitrogen.
  • Figure 4 flywheel storage in a schematic representation, wherein the cold surface is arranged around the flywheel.
  • Figure 5 Section A-A of Fig. 4 in an enlarged view.
  • the figure shows the motor / generator 10, the shaft 6 towards the motor / generator stator unit 17, which is arranged opposite to the shaft 6, the motor / generator rotor unit.
  • the temperature of the cold surface 9 is by the connection of the cold surface 9 to the
  • Cooling enclosure 12 of the HTS bearing element 5 generated. It lies in the present case between at most 80 and 100 degrees Kelvin below zero, wherein the cooling energy generated by the cryocooler 3 and the cooling connection 2 is transmitted to the HTS bearing element 5.
  • the cold surface 9 arranged in an advantageous position relative to the flywheel mass 7 precipitating gas particles freeze in the cold surface as a solid or as a liquid drop, with the result that a decrease in pressure occurs in the vacuum container 1 and thus the vacuum or the vacuum in the vacuum container 1 is improved.
  • FIG. 2 shows the schematic representation of a generator to which the invention in an analogous manner as applicable to a flywheel storage.
  • the generator is with a superconducting power supply 16 and a cold surface 9 equipped with an insulation 8, wherein the cold surface 9 is a cooling connection 15 to the cold source or the cooling connection of the superconducting element.
  • the cooling source from which the cooling connection 2 is supplied with cold, represents the cryocooler 3.
  • the cooling connection 2 cools the superconducting power supply 16 to the motor / generator
  • the cold surface 9 is arranged with its insulation 8 on its rear side off-axis to the flywheel 7.
  • FIG. 3 shows a schematic representation of a flywheel storage with a
  • flywheel 7 wherein the HTS bearing is cooled with liquid nitrogen 19 and the cold surface 9 is connected to the chamber 18 with liquid nitrogen 19.
  • the structure of this flywheel accumulator in the vacuum container 1, in which the vacuum 4 is located, is similar to the structure shown in FIG. However, instead of the cryocooler 3 for cooling the HTS bearing element 5, a chamber 18 for liquid nitrogen 19 is arranged, which has an insulation 20 for suspension 13 of the HTS bearing, wherein the cold surface 9 is disposed on both sides of the chamber 18 for the nitrogen 19 and is cooled by this. At the flywheel 7 side facing away from the cold surface 9, their insulation 8 is arranged. In order for a heat radiation of the cold surface 9 is avoided, so that it can work more effectively.
  • the cold surfaces 9 are arranged on both sides in the longitudinal direction of the flywheel 7, with the result that a higher vacuum can occur or the vacuum can be stabilized with higher intensity.
  • FIG. 4 shows a further advantageous embodiment of the invention, wherein the figure shows a schematic representation of a flywheel storage, consisting of the
  • FIG. 5 shows the detail AA of FIG. 4, in which it becomes clear how incident and precipitating gas particles 22, 23 are reflected by the flywheel 7 on the cold surface 9, wherein the reflection is in an angle range ⁇ 24 in a range between 110 and 160 degrees takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un dispositif servant à produire, améliorer et stabiliser un vide (4) dans le carter de machines tournant à grande vitesse, constitué de la masse d'inertie (7) dans le carter comprenant le vide (4), l'arbre (6), la masse d'inertie (7) et le palier supraconducteur de l'arbre (6). Une surface froide (9) qui fait geler les particules de gaz (23) se déposant est disposée dans une position avantageuse par rapport à la masse d'inertie (7). L'avantage de l'invention est qu'il s'agit d'un système passif qui ne nécessite aucun réglage de l'extérieur. Le dispositif peut utiliser des ressources déjà existantes et, en cas de pénétration intempestive de gaz extérieurs, il dispose d'un certain système de sécurité capable de retarder une perte brutale du vide. Il permet donc de mettre en place des mesures de protection du système. En outre, il offre une alternative plus économique aux dispositifs qui doivent être montés en permanence sur le système.
EP12716234.5A 2012-04-03 2012-04-03 Dispositif servant à produire, améliorer et stabiliser le vide dans le carter d'une masse d'inertie Withdrawn EP2844872A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/001469 WO2013149625A1 (fr) 2012-04-03 2012-04-03 Dispositif servant à produire, améliorer et stabiliser le vide dans le carter d'une masse d'inertie

Publications (1)

Publication Number Publication Date
EP2844872A1 true EP2844872A1 (fr) 2015-03-11

Family

ID=45999765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716234.5A Withdrawn EP2844872A1 (fr) 2012-04-03 2012-04-03 Dispositif servant à produire, améliorer et stabiliser le vide dans le carter d'une masse d'inertie

Country Status (2)

Country Link
EP (1) EP2844872A1 (fr)
WO (1) WO2013149625A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015172A1 (de) 2014-10-10 2016-04-14 Messer Group Gmbh Vorrichtung zum Verbessern des Vakuums im Gehäuse einer Maschine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2426353A1 (fr) * 1978-05-17 1979-12-14 Sp K Bjur Machine electrique a refroidissement cryogenique perfectionnee
US5462402A (en) 1994-02-22 1995-10-31 Rosen Motors, L.P. Flywheel energy storage system with integral molecular pump
DE19608099C1 (de) * 1996-03-02 1997-02-27 Karlsruhe Forschzent Schwungrad-Energiespeicher
DE19632123A1 (de) 1996-08-09 1998-02-12 Leybold Vakuum Gmbh Kryopumpe
DE19709674C1 (de) * 1997-03-11 1998-02-12 Karlsruhe Forschzent Schwungrad-Energiespeicher
DE19714549C2 (de) 1997-04-09 1999-02-04 Wtz Motoren & Maschforsch Gmbh Vakuumgehäuse für ein Schwungrad für hohe Drehzahlen
US6442949B1 (en) * 2001-07-12 2002-09-03 General Electric Company Cryongenic cooling refrigeration system and method having open-loop short term cooling for a superconducting machine
JP2003219581A (ja) * 2002-01-24 2003-07-31 Railway Technical Res Inst 超電導フライホイ−ル電力貯蔵装置
DE10331201A1 (de) 2003-07-10 2005-01-27 Leybold Vakuum Gmbh Kryopumpe
JP4937687B2 (ja) * 2006-09-27 2012-05-23 公益財団法人鉄道総合技術研究所 電力貯蔵用超電導フライホイール装置
JP5275957B2 (ja) * 2009-11-02 2013-08-28 公益財団法人鉄道総合技術研究所 超電導磁気軸受付きフライホイール蓄電装置
JP5669059B2 (ja) * 2010-05-11 2015-02-12 学校法人加計学園 超伝導モーター又は超伝導発電機

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2013149625A1 *

Also Published As

Publication number Publication date
WO2013149625A8 (fr) 2013-11-21
WO2013149625A1 (fr) 2013-10-10

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