WO2014048466A1 - Elektrische maschine mit verbessertem schleifring, insbesondere für kompressoren und mühlen - Google Patents
Elektrische maschine mit verbessertem schleifring, insbesondere für kompressoren und mühlen Download PDFInfo
- Publication number
- WO2014048466A1 WO2014048466A1 PCT/EP2012/068979 EP2012068979W WO2014048466A1 WO 2014048466 A1 WO2014048466 A1 WO 2014048466A1 EP 2012068979 W EP2012068979 W EP 2012068979W WO 2014048466 A1 WO2014048466 A1 WO 2014048466A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slip ring
- electrical
- rotor
- diameter
- electric machine
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 description 9
- 230000002411 adverse Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101150107341 RERE gene Proteins 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/24—Driving mechanisms
-
- 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
- H02K5/14—Means for supporting or protecting brushes or brush holders
Definitions
- the invention relates to an electric machine having a stator, a rotatably mounted rotor arranged in the stator and having electrical windings
- slip ring and a cylindrical member having a cylinder diameter, wherein the slip ring is electrically connected to the electrical windings and having a slip ring diameter, and wherein the rotor is arranged radially outwardly on the lateral surface of the cylindrical member. Furthermore, the invention relates to a compressor or a mill with such an electric machine.
- the rotor consists in these solutions of the actual driven shaft and the electrically active rotor parts.
- the electrical excitation of such machines via
- slip rings with a large diameter.
- the slip ring is usually located in or near the axial region of the rotor and the stator to make the slip ring line between pole winding and slip ring as short as possible.
- Such an electrical machine used in a tube mill for example, from DE 35 27 293 AI be ⁇ known.
- the electric machine has a stator and a rotor therein, which is arranged on a tubular drum of the tube mill and has rotor windings on ⁇ .
- the rotor windings can be supplied with electrical power by means of slip rings mounted radially on the outside of the drum.
- the invention has for its object to improve known electrical ⁇ cal machine with slip rings. This object is achieved by an electric machine of the type mentioned ⁇ one fact that the slip ring diameter is smaller than the cylinder diameter. Furthermore, this object is achieved by a compressor or a mill with such an electric machine.
- slip ring diameter is smaller than the cylinder diameter
- production of such a slip ring is comparatively simple and inexpensive.
- ⁇ re in large and powerful electric machines which are used in compressors or mills, especially tube mills, the slip ring thus does not need to be performed segmented, but can be designed as a single component.
- Such powerful Ma ⁇ machines for example, have an electric power of several megawatts, in particular more than 10 MW.
- Slip ring with a relatively small diameter which in particular is not segmented, high demands on the dimensional accuracy, especially in relation to round and axial run, relatively easy to meet, so that the production costs are very low.
- the inventive concept Compared to the conventional electrical machines, in which the slip ring diameter is at least equal to the cylinder diameter, the inventive
- Slip ring transmit the same electrical excitation power, but a lower material use leads to a significant reduction in component costs.
- slip ring to a corresponding component of the electrical machine "threaded" in a single operation and mounted on the member who ⁇ .
- segmented slip rings corresponds
- Any necessary rework, such as the grinding or Abtra ⁇ conditions of material of the slip ring to ensure a sufficiently precise concentricity of the slip ring can thus be omitted com ⁇ plett.
- the stator and the rotor are arranged in the same axial region of the electric machine.
- the slip ring diameter may be arranged, for example, in a different axial region than the rotor and the stator.
- the stator and the rotor are surrounded by a protective housing, this results in an advantage that the be ⁇ forced axial space for such a protective housing can be redu sheet ⁇ so that the machine design is simplified and to provide greater freedom of design.
- the cylindrical member may be a drum of the mill out ⁇ leads.
- the material to be ground can be ground in the drum, which has the diameter of the cylinder.
- the rotor together with its electrical windings is arranged radially on the outside of the lateral surface of the drum and the slip ring is arranged on a rotating part of the electric machine with a smaller diameter.
- the slip ring can be designed such that meh ⁇ rere electrical phases are transferable, for example, da ⁇ by that the slip ring has a plurality of electrical busbars that are electrically isolated from each other to the elekt ⁇ cal windings.
- the cylindrical element tapers to one of its axial En ⁇ the, wherein the cylindrical member at this axial end is mounted, and wherein the slip ring is arranged in the axial region of the bearing or the taper of the cylindrical element.
- the tapered cylindrical member is mounted at this axial end, wherein still another or more further bearings may be provided elsewhere.
- the arrangement of the slip ring in the axial region of the bearing or the taper has the advantage that the electrical machine see neither more space in the radial direction requires more space in the axial direction, because such a taper is typically due to the purpose of the electric machine and not by improving the slip ring.
- a slip ring with a particularly small diameter can thus be used, so that the
- Cost savings for example, due to the reduced Ma ⁇ terialaufwandes compared to larger, especially seg ⁇ mented slip rings, are particularly large. A desired dimensional accuracy can be achieved particularly easily by a slip ring with such a small diameter.
- the taper of the cylin ⁇ derförmigen element may be configured as inputs or outlet opening for the material to be ground, which usually has the smallest diameter of all rotatable parts.
- the provision of the slip ring in the region of the smallest diameter of the cylindrical element leads to the fact that the axial length of the mill increases, can also be seen ⁇ before, to arrange the slip ring on the taper of the cylindrical element such that the slip ring Has the smallest possible slip ring diameter and at the same time the axial length of the mill is not increased.
- the cylindrical element has an axial region with a constant diameter which is equal to the cylinder diameter, and has a further axial region towards the abovementioned axial end, in FIG which reduces the diameter and which thus represents the taper.
- the cylindrical element in the axial direction has only ei ⁇ nen single diameter which is equal to the cylinder diameter, and the taper is designed as a separate component, which is ver ⁇ connected with the cylindrical element and itself the cylindrical element in axial extension at its above-mentioned axial end connects.
- such a taper can be embodied as a flange, in particular a fastening flange.
- the electric machine has at least one brush which contacts the slip ring and by means of which the elekt ⁇ cal windings of the rotor via the electrical connection with electrical power can be supplied, wherein the slip ring and the at least one brush at least partially are enclosed by a first housing.
- the slip ring and the at least one brush can be reliably protected from adverse environmental influences, whereby the life of the slip ring and the at least one brush can be extended. This is especially in mills of great advantage, since there dust and rock fragments could damage a ⁇ penetrate and these in the electrical machine.
- the first housing may, for example element a first Dichtele-, for example in the form of a first sealing ring, have ⁇ , which at least for small pieces of rock, in particular for dust and spray ⁇ water, closes off the transition between rotary parts and stationary parts of the electrical machine. Furthermore, it can be provided that the electrical connection of the slip ring with the electrical windings is passed through the first housing and is electrically isolated from the first housing.
- ⁇ when the cylindrical member has a taper and the slip ring is disposed on the same axial end of the cylindrical member as the taper, the electrical ⁇ specific compound can be attached radially outside of the taper, wherein the electrical connection is electrically isolated from the taper.
- the stator and the rotor are at least partially enclosed by a second housing, wherein the electrical connection is electrically isolated from the second housing into the second housing, wherein the electrical connection is isolated from the second housing.
- the second housing can in turn have a second sealing element, for example in the form of a second sealing ring, which seals the transition between rotatable parts and stationary parts of the electric machine, at least for smaller rocks, in particular for dust and spray water.
- a second sealing element for example in the form of a second sealing ring, which seals the transition between rotatable parts and stationary parts of the electric machine, at least for smaller rocks, in particular for dust and spray water.
- the cylindrical element is at least partially hollow cylindrical in shape and has at least at one of its axial ends an opening.
- the hollow cylindrical part of the cylindrical element may for example be the drum of a mill, wherein the opening may be provided for the supply and removal of the ground material.
- FIG. 1 shows an electrical machine of a tube mill according to the prior art.
- the electric machine has a Sta ⁇ gate 1, in which coaxial with the stator 1, a rotor 2 is arranged with electrical windings 3, wherein the rotor 2 is arranged radially on the outside of a cylindrical element 5 of the mill.
- the electrical windings 3 of the rotor 2 are connected by means of an electrical connection 11 with a
- Slip ring 4 is connected, wherein the slip ring 4 is electrically isolated from the cylindrical element 5 and thereby rotatably connected to the radial outer surface thereof.
- the cylindrical member 5 has a cylinder diameter ⁇ 6 and the slip ring 4 a slip ring diameter 7, wherein the slip ring diameter 7 is greater than the cylinder diameter. 6
- the rotor 2 can be supplied with electrical power via brushes 10, which are in electrical contact with the slip ring 4.
- the slip ring 4 is often made segmented.
- FIG. 2 shows a first embodiment of the invention shown SEN electrical machine.
- the electric machine has an NEN stator 1 and a concentric to the stator 1 and disposed within the stator 1 rotor 2, wherein the rotor 2 is arranged radially outwardly on a cylindrical element 5, which has a cylinder diameter 6.
- the stator 2 has electrical windings 3, which are connected by means of egg ⁇ ner electrical connection 11 with a slip ring 4, wherein the slip ring 4 has a slip ring diameter 7, which is smaller than the cylinder diameter 6.
- a brush 10 is provided, which is in contact with the slip ring 4, so that the electrical windings 3 of the rotor 2 electrical power through the brush 10, the slip ring 4 and the electrical connection 11 can be supplied.
- Figure 3 shows a second embodiment of the invention shown SEN electrical machine.
- the same reference symbols designate the same objects as in FIG.
- the cylindrical element 5 has a taper 9 at its illustrated axial end.
- a first housing 12 is arranged, in which the
- Slip ring 4 is housed, whose slip ring diameter 7 is significantly smaller than the cylinder diameter 6.
- the slip ring 4 is shown as having bus bars for three electrical phases.
- the first housing 12 also in the first housing 12 are three brushes 10, which are in contact with the respective bus bar of the slip ring 4.
- the first housing 12 surrounds the slip ring 4 and the brushes 10 at least partially, with a first sealing element 15, for example in the form of a sealing ring or a plurality of sealing rings, being provided between rotatable and stationary parts of the first housing 12.
- a first sealing element 15 for example in the form of a sealing ring or a plurality of sealing rings
- the rotor 2 and the stator 1 are arranged in a second housing 13 which at least partially closes the two ⁇ . It is between rotating and stationary parts a second sealing element 16 is provided, which in turn may be designed as a sealing ring or a plurality of sealing rings. In this case, the second housing 13 protects the electrical Wicklun ⁇ gen 3, the rotor 2 and the stator 1 from adverse environmental influences.
- the electrical connection 11 is passed through the first housing 12, the electrical connection 11 being electrically insulated from the first housing 12.
- the electrical Ver ⁇ bond 11 is then guided to the rotor 2 and is secured to the radially outer side of the taper 9 by means of a support member 17, wherein the electrical connection 11 is electrically isolated from the taper 9.
- the cylindrical element 5 is supported by a bearing 8 at that axial end, where the taper 9 is also arranged.
- the cylindrical element 5 as a hollow ⁇ cylinder and the taper 9 are designed as a rotationally symmetrical hollow body, so that the cylindrical element 5 has an opening 14 in the axial direction.
- the mill base can be switched on and / or out through the opening 14 of the ⁇ .
- the invention relates to an electric machine with a stator, a rotatably mounted rotor arranged in the stator, which has electrical windings, a slip ring, and a cylindrical element which has a cylinder diameter, wherein the
- Slip ring is electrically connected to the electrical windings and has a slip ring diameter, and wherein the rotor is arranged radially outward on the lateral surface of the cylindrical element. Furthermore, the invention relates to a compressor or a mill with such a ⁇ electric machine. In order to improve known electrical machines with slip rings, it is proposed that the slip ring diameter is smaller than the cylinder diameter.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012391128A AU2012391128B2 (en) | 2012-09-26 | 2012-09-26 | Electric machine comprising an improved slip ring, particularly for compressors and mills |
DE112012006939.0T DE112012006939A5 (de) | 2012-09-26 | 2012-09-26 | Elektrische Maschine mit verbessertem Schleifring, insbesondere für Kompressoren und Mühlen |
PCT/EP2012/068979 WO2014048466A1 (de) | 2012-09-26 | 2012-09-26 | Elektrische maschine mit verbessertem schleifring, insbesondere für kompressoren und mühlen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2012/068979 WO2014048466A1 (de) | 2012-09-26 | 2012-09-26 | Elektrische maschine mit verbessertem schleifring, insbesondere für kompressoren und mühlen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014048466A1 true WO2014048466A1 (de) | 2014-04-03 |
Family
ID=47046559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/068979 WO2014048466A1 (de) | 2012-09-26 | 2012-09-26 | Elektrische maschine mit verbessertem schleifring, insbesondere für kompressoren und mühlen |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2012391128B2 (de) |
DE (1) | DE112012006939A5 (de) |
WO (1) | WO2014048466A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023222230A1 (en) * | 2022-05-19 | 2023-11-23 | Abb Schweiz Ag | Modular sealing system and an electric motor with such a modular sealing system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1224933A (en) * | 1916-06-17 | 1917-05-08 | Walter G Swart | Rotary mill. |
DE3527293A1 (de) | 1985-07-30 | 1987-02-05 | Siemens Ag | Anordnung zur beruehrungslosen gewichtsmessung an rohrmuehlen |
DE19641834A1 (de) * | 1996-10-10 | 1998-04-23 | Siemens Ag | Vorrichtung zum Tragen und zum elektrischen Kontaktieren von Schleifbürsten, insbesondere für Turbogeneratoren |
-
2012
- 2012-09-26 WO PCT/EP2012/068979 patent/WO2014048466A1/de active Application Filing
- 2012-09-26 AU AU2012391128A patent/AU2012391128B2/en active Active
- 2012-09-26 DE DE112012006939.0T patent/DE112012006939A5/de active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1224933A (en) * | 1916-06-17 | 1917-05-08 | Walter G Swart | Rotary mill. |
DE3527293A1 (de) | 1985-07-30 | 1987-02-05 | Siemens Ag | Anordnung zur beruehrungslosen gewichtsmessung an rohrmuehlen |
DE19641834A1 (de) * | 1996-10-10 | 1998-04-23 | Siemens Ag | Vorrichtung zum Tragen und zum elektrischen Kontaktieren von Schleifbürsten, insbesondere für Turbogeneratoren |
Non-Patent Citations (1)
Title |
---|
EUGEN WIEDEMANN, WALTER KALTENBERGER: "Konstruktion elektrischer Maschinen", 1967, SPRINGER VERLAG, Berlin/Heidelberg/New York, XP002700294 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023222230A1 (en) * | 2022-05-19 | 2023-11-23 | Abb Schweiz Ag | Modular sealing system and an electric motor with such a modular sealing system |
Also Published As
Publication number | Publication date |
---|---|
DE112012006939A5 (de) | 2015-06-11 |
AU2012391128A1 (en) | 2015-03-26 |
AU2012391128B2 (en) | 2017-04-06 |
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