WO2008034682A1 - Dispositif pour refroidir une machine électrique refroidie par liquide avec une protection anticorrosive par galvanisation à température élevée - Google Patents

Dispositif pour refroidir une machine électrique refroidie par liquide avec une protection anticorrosive par galvanisation à température élevée Download PDF

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Publication number
WO2008034682A1
WO2008034682A1 PCT/EP2007/058700 EP2007058700W WO2008034682A1 WO 2008034682 A1 WO2008034682 A1 WO 2008034682A1 EP 2007058700 W EP2007058700 W EP 2007058700W WO 2008034682 A1 WO2008034682 A1 WO 2008034682A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
arrangement
cooling system
liquid
electric machine
Prior art date
Application number
PCT/EP2007/058700
Other languages
German (de)
English (en)
Other versions
WO2008034682A8 (fr
Inventor
Christian Markert
Markus Oestreich
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2008034682A1 publication Critical patent/WO2008034682A1/fr
Publication of WO2008034682A8 publication Critical patent/WO2008034682A8/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/24—Protection against failure of cooling arrangements, e.g. due to loss of cooling medium or due to interruption of the circulation of cooling medium

Definitions

  • the invention relates to an arrangement for cooling a liquid-cooled electric machine with a cooling system, wherein the cooling system has a cooling base body and a cooling jacket body and wherein a cooling structure is arranged between the cooling base body and the cooling jacket body.
  • Cooling systems are used to protect components from thermal overload by dissipating the excess heat.
  • the cooling system includes, for example, a liquid ⁇ cooling, wherein the heat-dissipating coolant is, for example, water.
  • the resulting heat is absorbed by the cooling medium ⁇ and discharged for example via a saucetau ⁇ shear or heat exchanger or radiator, for example to the ambient air.
  • the cooling device can also have, for example, a pump for a pump-controlled forced circulation cooling.
  • Cooling systems for liquid-cooled electrical machines are made, for example, of iron or steel.
  • water as a coolant
  • the cooling system is exposed to corrosion, whereby damage to the destruction of the component, ie the cooling system, takes place.
  • the corrosion product which is made of iron or steel together with water and oxygen, is called rust.
  • a component for example, as long as possible the cooling system, it is necessary for reasons of host ⁇ -effectiveness and environmental protection in terms of ⁇ to gangs of natural resources, protect the component by coating against corrosion and rust.
  • Previous cooling systems or heat sinks of electric motors for example, by a cooling medium, such as acted upon, wherein the cooling medium corresponding inhibi ⁇ tors, ie corrosion-inhibiting substances are added.
  • Oxygen corrosion in closed cooling systems is limited by the successive consumption of oxygen.
  • the disadvantage here is that such inhibitors forharidesyste ⁇ me, which are operated for example with well or seawater, are not suitable for environmental reasons.
  • Object of the present invention is to provide a cooling system for a liquid-cooled electric machine legizustel ⁇ len having sufficient corrosion protection, and wherein the anticorrosive is as simple as possible to manufacture.
  • the arrangement for cooling a liquid-cooled electric machine includes a cooling system, wherein the cooling system has a cooling base body and a cooling jacket body. Between cooling body and cooling jacket body, a cooling structure is arranged.
  • the cooling structure has a corrosion-resistant surface layer.
  • the cooling system for a rotary machine of the cooling base body is formed for example as a cylindrical hollow body, wherein on the outer surface of the hollow cylinder, the cooling structure is arranged. On or on the cooling structure of the cooling jacket body is arranged.
  • the cooling system is arranged on the stator of the electrical machine, ie the cooling system encloses the stator of the electrical machine. see machine, the electric machine is preferably designed as an internal rotor machine.
  • the cooling system is thus designed as a surface cooling, wherein the stator is flowed around by the coolant.
  • the entire cooling system is also hollow cylindrical sobil ⁇ det.
  • the cooling system which is designed as a cooling jacket system, is applied as a whole by shrinking onto the stator.
  • the cooling jacket system is heated, causing it to expand and, with appropriate expansion, pushed onto the stator. After cooling, the cooling system is firmly attached to the stator.
  • the cooling structure preferably has a helical groove or the cooling structure itself is designed as a helical groove.
  • Spiral groove is helically or radially encircling around the outer surface of the cooling base body, which is formed at ⁇ play, for example, as a hollow cylinder on the cooling body, where ⁇ in the helical groove in the direction of the cooling jacket body is open.
  • Cooling base body and cooling structure can be formed in one or two parts. With a one-piece design of the cooling base body and the cooling structure, the helical groove can be produced, for example, by mechanical processing, for example by turning or milling. The cooling spiral groove could also be produced by forming the cooling base body. In the case of a two-part design, a helical groove can be formed, for example, by a circumferential web which is welded to the cooling main body. In the interstices of the individual web sections, a groove inevitably arises.
  • the radially latestbil ⁇ an end in the circumferential direction of the heat sink bodyde mindfullnut can also be designed such that the helical groove extends in the axial direction (with respect to the rotary shaft of the electric machine).
  • the cooling coil could, for example, be arranged meandering around the cooling base body. Also, the cooling coil may have different slopes and / or different axial distances. Is beispielswei ⁇ se a high cooling demand, the axial distance between the individual Wendelnutabêten is formed small, that the individual groove portions are located axially close to each other.
  • the corrosion-resistant surface ⁇ layer is formed as a zinc layer by means of high-temperature galvanizing (HTV).
  • HTV high-temperature galvanizing
  • High Temperature Galvanizing is a special form of hot dip galvanizing.
  • hot-dip galvanizing is meant the over ⁇ pull of steel parts with a massive, metallic zinc plating by immersing the pretreated steel parts in egg ne melt of liquid zinc.
  • the galvanizing itself takes place in a zinc bath whose operating temperature is between 440 0 C and 460 0 C. Since the melting temperature of zinc at 419 ° C, this value is generally suffi ⁇ accordingly.
  • hot-dip galvanizing The durability distinguishes the hot-dip galvanizing from other corrosion protection methods. Even under extreme conditions, hot-dip galvanizing protects the steel for decades. The reason for the longevity of a hot-dip galvanizing is the inseparable connection that zinc and steel undergo.
  • a metallurgical reaction takes place in which steel and zinc form common iron-zinc alloy layers, over which, as a rule, a pure zinc coating is laid.
  • the layer thickness is usually between 50 .mu.m and 150 .mu.m.
  • the alloy makes this corrosion protection unrivaled hard, abrasion-resistant and resistant and therefore withstands even heavy mechanical loads effortlessly.
  • High-temperature galvanizing offers decisive advantages over conventional galvanizing. It is a dip-galvanizing process in which the special properties of the alloy phases zinc (Zn) and iron (Fe) at temperatures of 530 0 C to 620 0 C are exploited. By the high temperatures changes the structure of the alloy layers. It comes to a homogeneous layer growth. The resulting surface is characterized by a high micro-hardness. Further, a particularly thin and uniform alloy layer is provided ⁇ guaranteed by the high temperatures.
  • the cooling system has a hard to access internal cooling structure with complex geometry. According to the specification of the coolant, namely water, results in a high corrosive stress for the cooling system.
  • the cooling system is preferably a mechanically closed and thus liquid-tight welded construction made of steel, in particular St52, with a complex and difficult to access, ie internal, cooling structure.
  • the cooling system is initially manufactured with cooling body, cooling structure and cooling jacket body. Subsequently, the entire cooling system is immersed in a high-temperature zinc bath. Since the cooling system, in particular the cooling jacket body, has an inlet and a drain for the coolant, this inlet and outlet can simultaneously serve as inlet and outlet for the liquid zinc.
  • the liquid zinc which has a very low viscosity ⁇ passes through the inlet into the cooling structure, a, coated, the cooling structure and then passes out through the outlet from the cooling system.
  • the cooling system may also consist of two parts, wherein the cooling system, for example by an axial section (in loading train to the rotary shaft of the electric motor) in two parts ge ⁇ is divided.
  • the advantage is that a coating of the cooling structure in the zinc bath is easier, since the cooling coil ⁇ nut is more easily accessible for the coating material.
  • a disadvantage is that the parts must be assembled later at a cooling ⁇ system, for example by welding, thereby galvanizing but may be damaged.
  • the advantage of the HTV lies in the short process time and the low cost of the process.
  • the principal advantage of galvanizing is the so-called self-healing process of the surface layer. Any damage (defects) of the surface layer would close itself within certain limits due to the potential differences (zinc less noble than steel).
  • the coolant is water, as in ⁇ example cold city water or filtered well, lake or river fresh water.
  • the coolant can also be any other coolant.
  • the cooling system for flow systems is appro ⁇ net.
  • Flow systems are characterized by the fact that not only pure or distilled water but also well, lake or river water can be used as the coolant, ie water, which usually contains dirt particles.
  • the coolant is directed through an inlet into the cooling system ⁇ into it, then flows through thede Listelnut and absorbs the heat loss of the electric machine and then exits from a drain from themésys ⁇ tem.
  • the cooling water releases the heat via a bathtau ⁇ shear or radiator to the ambient air.
  • the now cooled water again passes through the cooling system, for example, a pump provides for water circulation.
  • the arrangement for cooling the liquid-cooled electric motor may also have a plurality of separate cooling systems, for example when the electric motor has a large axial length.
  • the plurality of cooling systems are then arranged side by side in axial length and connected to each other, wherein the cooling systems can be connected in parallel and / or in series ⁇ Kings.
  • the cooling system is simultaneously formed as a housing for the electric machine.
  • a housing protects the electric machine before Regeneinflüs ⁇ sen, such as dirt.
  • the cooling system encloses the stator of the electric machine, wherein the electric machine is preferably designed as an internal rotor machine.
  • the cooling system is now formed in its axial extent, that it is designed to be longer than the stator and also, if present, winding heads of the stator over ⁇ covers. Thus, the winding heads are simultaneously protected and cooled by the cooling system.
  • An additional housing ⁇ component is therefore not necessary, which material is ⁇ saves and the production costs are reduced.
  • the electric machine is preferably designed as a rotary permanent-magnet synchronous motor or servo-synchronous motor, wherein the synchronous motor can be designed as an internal rotor or external rotor machine.
  • the cooling system of the water-cooled electric machine is designed to be an operation of the electric machine or the electric motor can be operated in a flow-through system with protection against corrosion.
  • FIG. 1 shows a perspective view of an inventive ⁇ Shen arrangement for cooling an electric machine
  • FIG. 2 shows a sectional view of the arrangement according to FIG. 1; 3 shows a first embodiment of a cooling coil ⁇ nut; and
  • FIG. 4 shows a second embodiment of améwen ⁇ delnut.
  • the cooling system 1 shows a perspective view of a cooling system 1 for cooling an electric machine, not shown.
  • the cooling system 1 has the cooling base body 2 and the cooling jacket body 4. Between cooling base body 2 and cooling jacket body 4, a cooling structure 3 is arranged, which is surface-coated corrosion-resistant.
  • the cooling system 1 is provided for a rotary machine, not shown.
  • the cooling base body 2 is formed as a cylindrical hollow body, wherein on the outer surface 2 a of the hollow cylindrical cooling base 2, the cooling structure 3 is arranged. On or on the cooling structure 3, the cooling jacket body 4 is arranged.
  • the cooling system 1 is arranged on a stator (not shown) of an electric machine (not shown), ie the cooling system 1 encloses the stator of the electric machine.
  • the complete cooling system 1 is also formed as a hollow cylinder.
  • the cooling structure 3 is formed asdetorylnut 3a.
  • the helical groove 3a is arranged on the cooling base body 2 in a helical or radially encircling manner around the outer surface 2a of the cooling base body 2, the helical groove 3a being open in the direction of the cooling jacket body 4.
  • Cooling body 2 and cooling structure 3 are formed in one piece.
  • the cooling structure 3 is made by me ⁇ chanical processing, for example by turning or frae ⁇ sen.
  • the cooling structure 3 or the cooling coil 3a has a corrosion-resistant zinc layer, which is formed by means of high-temperature galvanizing (HTV).
  • the cooling system 1, in particular the cooling jacket body 4, also has an inlet 5a and a drain 5b for a coolant.
  • the inlet 5a can also serve as the outlet 5b and the outlet 5b as the inlet 5a.
  • inlet and outlet 5a, 5b can simultaneously serve as inlet and outlet for the high-temperature galvanizing, ie for the liquid zinc.
  • the liquid zinc which has a very low viscosity ⁇ occurs, for example, through the inlet 5a in the cooling spiral groove 3a, a coated them, then comes out through the outlet 5b of the cooling system. 1
  • FIG. 2 shows a sectional view of the arrangement according to FIG. 1.
  • the representation according to FIG. 2 shows an axial section through the cooling system 1 parallel to a not shown
  • FIG. 2 shows that cooling base body 2 and cooling structure 3, which is designed as a cooling spiral groove 3 a, are formed in one piece.
  • the cooling jacket body which is designed, for example, as a simple sheet metal, is arranged on ⁇ and thus closes off the cooling system 1 to the outside.
  • the cooling system 1 is shrunk onto the indicated stator 6 of an electric motor, not shown.
  • the electric drive is designed for example as a permanent-magnet synchronous motor or servo-synchronous motor.
  • FIG 3 and FIG 4 show exemplary embodiments of a cooling ⁇ structure 3.
  • FIG 3 shows a radially encirclingdechtlnut 3a, as shown in FIG.
  • the radially in the circumferential direction of the heat sink body 2 formed cooling coil ⁇ groove 3a shown in FIG 3 can also be designed such that the helical groove 3a extending in the axial direction with respect to the adequacy pointed rotating shaft 7 of an electrical machine not shown in detail (FIG 4) ,
  • the cooling coil 3a according to FIG. 4 is arranged in a meander shape around the cooling base body 2.
  • FIG. 3 and FIG. 4 show an indicated rotary shaft 7 of an electric motor and also indicated inlet and outlet 5a, 5b for the coolant.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne un procédé de fabrication de fibres polymères, en particulier de nano et méso fibres, selon le procédé de filage électrique. Selon ce procédé, on procède au filage électrique d'une dispersion colloïdale d'au moins un polymère sensiblement non soluble dans l'eau et d'au moins un agent tensioactif non ionique, contenant le cas échéant par ailleurs également au moins un polymère soluble dans l'eau dans un milieu aqueux. La présente invention concerne en outre des fibres pouvant être obtenues grâce à ce procédé.
PCT/EP2007/058700 2006-09-22 2007-08-22 Dispositif pour refroidir une machine électrique refroidie par liquide avec une protection anticorrosive par galvanisation à température élevée WO2008034682A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006044785A DE102006044785A1 (de) 2006-09-22 2006-09-22 Anordnung zur Kühlung einer flüssigkeitsgekühlten elektrischen Maschine mit Korrosionsschutz durch Hochtemperaturverzinken
DE102006044785.9 2006-09-22

Publications (2)

Publication Number Publication Date
WO2008034682A1 true WO2008034682A1 (fr) 2008-03-27
WO2008034682A8 WO2008034682A8 (fr) 2008-05-22

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WO (1) WO2008034682A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109605712A (zh) * 2018-12-28 2019-04-12 南京越升挤出机械有限公司 一种聚合物发泡加工用挤出机的冷却筒体
US11780000B2 (en) 2020-04-29 2023-10-10 Deere & Company Method of forming parallel spiral channels in housing to be formed by casting or molding process

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DE102012213070A1 (de) * 2012-07-25 2014-01-30 Siemens Aktiengesellschaft Kühlmantel mit einem Dichtmittel
DE102012219120A1 (de) 2012-10-19 2014-04-24 Robert Bosch Gmbh Dünnwandiges Gehäuse mit Kühlfluid lenkenden Kraftübertragungselementen
DE102012022873A1 (de) * 2012-11-22 2014-05-22 Compact Dynamics Gmbh Verfahren zum Verlöten von Ständer und Kühler und Ständer mit Lotverbindung zum Ständerträger
DE102012023050A1 (de) * 2012-11-26 2014-05-28 Volkswagen Aktiengesellschaft Elektrische Maschine und Verfahren zur Herstellung einer elektrischen Maschine
DE102013209614A1 (de) * 2013-05-23 2014-11-27 Pfeiffer Vacuum Gmbh Verfahren zur Herstellung eines strukturierten Bauteils
DE102013226851A1 (de) * 2013-12-20 2015-06-25 Siemens Aktiengesellschaft Rotatorische dynamoelektrische Maschine mit einem Kühlsystem
DE102014208986A1 (de) * 2014-05-13 2015-11-19 Volkswagen Aktiengesellschaft Ein von einem Kühlmittel durchströmbarer Kühlmantel sowie eine mit einem solchen Kühlmantel ausgestattete Kraft- oder Arbeitsmaschine
DE102014223875A1 (de) * 2014-11-24 2016-05-25 Robert Bosch Gmbh Gehäuse geeignet für die Aufnahme einer Antriebseinheit eines Elektromotors
DE102015221115A1 (de) 2015-10-28 2017-05-04 Volkswagen Aktiengesellschaft Kühlgehäuse für eine elektrische Maschine und Herstellungsverfahren für ein solches
DE102015226023A1 (de) 2015-12-18 2017-06-22 Siemens Aktiengesellschaft Flüssigkeitsgekühlte, elektrische Antriebskomponente, Antriebsstrang, Fahrzeug und Verfahren
DE102016222260A1 (de) 2016-11-14 2018-03-08 Continental Automotive Gmbh Elektrische Maschine
DE102018117774B4 (de) * 2018-07-23 2020-09-03 Hiwin Mikrosystem Corp. Kühlstruktur einer drehenden elektrischen Maschine
DE102022207424A1 (de) 2022-07-20 2024-01-25 Vitesco Technologies Germany Gmbh Gehäuse mit Gehäusekühlung, elektrische Maschine, Verfahren zur Kühlung der elektrischen Maschine und Kraftfahrzeug

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US4831701A (en) * 1985-02-12 1989-05-23 Sanden Corporation Method of making a corrosion resistant aluminum heat exchanger using a particulate flux
DE4101011A1 (de) * 1991-01-15 1992-07-16 Metaleurop Gmbh Verfahren zur hochtemperaturverzinkung
JPH08298750A (ja) * 1995-04-24 1996-11-12 Ebara Corp 水冷ジャケットを具備するモータ
EP0822641A2 (fr) * 1996-07-30 1998-02-04 Ebara Corporation Moteur à manchon d'entrefer
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Publication number Priority date Publication date Assignee Title
CN109605712A (zh) * 2018-12-28 2019-04-12 南京越升挤出机械有限公司 一种聚合物发泡加工用挤出机的冷却筒体
US11780000B2 (en) 2020-04-29 2023-10-10 Deere & Company Method of forming parallel spiral channels in housing to be formed by casting or molding process

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DE102006044785A1 (de) 2008-04-03
WO2008034682A8 (fr) 2008-05-22

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