DE512648C - Protective shield for electrical machines with openings for the passage of cooling air in the radial direction - Google Patents
Protective shield for electrical machines with openings for the passage of cooling air in the radial directionInfo
- Publication number
- DE512648C DE512648C DES95024D DES0095024D DE512648C DE 512648 C DE512648 C DE 512648C DE S95024 D DES95024 D DE S95024D DE S0095024 D DES0095024 D DE S0095024D DE 512648 C DE512648 C DE 512648C
- Authority
- DE
- Germany
- Prior art keywords
- cooling air
- protective shield
- passage
- openings
- radial direction
- 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
Links
- 238000001816 cooling Methods 0.000 title claims description 14
- 230000001681 protective effect Effects 0.000 title claims description 14
- 238000004804 winding Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 210000004712 air sac Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Description
Um die Stirnverbindungen der Wicklungen elektrischer Maschinen oder die Verbindungsfahnen zwischen der Wicklung und dem Kommutator von Kommutatormaschinen oder auch den Kommutator selbst gegen Berührung und vor Beschädigung zu schützen, versieht man die elektrische Maschine mit Schutzschilden. Diese Schutzschilde haben nun den Nachteil, daß sie die Kühlung der Maschine wesentlichAround the end connections of the windings of electrical machines or the connection lugs between the winding and the commutator of commutator machines or the commutator itself against contact and To protect against damage, the electrical machine is provided with protective shields. These protective shields now have the disadvantage that they significantly cool the machine
ίο verschlechtern, da sie den Widerstand des Kühlluftstromes erhöhen und vielleicht auch Luftsäcke bilden. Außerdem werden in diesen Schutzschilden unter Umständen starke Wirbelströme induziert. Um den Nachteil der Verschlechterung der Kühlwirkung zu vermindern, hat man diese Schutzschilde mit Öffnungen versehen. Die Anordnung ist etwa derart, daß der aus Gußeisen bestehende Schutzschild mit in der Umfangsrichtung der Maschine nebeneinanderliegenden ziemlich breiten Schlitzen versehen ist.ίο worsen the resistance of the cooling air flow increase and maybe also form air sacs. In addition, these protective shields may induce strong eddy currents. To the disadvantage of deterioration To reduce the cooling effect, these protective shields have been provided with openings. The arrangement is approximately such that the protective shield made of cast iron with in the Circumferential direction of the machine provided adjacent rather wide slots is.
Die vorliegende Erfindung betrifft eine Konstruktion derartiger Schutzschilde an elektrischen Maschinen, die für das Hindurchtreten des Kühlluftstromes einen besonders geringen Widerstand besitzt und in der auch das Auftreten von Wirbelströmen wirksam unterdrückt ist. Erfindungsgemäß besteht der Schutzschild aus mehreren in Richtung der Maschinenachse nebeneinander angeordneten scheibenförmigen Ringen, zwischen denen Abstände für das Hindurchtreten der Kühlluft gelassen sind. Die Kühlluft durchströmt den Schutzschild in radialer Richtung. Der Widerstand der einzelnen Ringe ist für das Hindurchströmen der Kühlluft besonders gering, da die etwa aus Blechscheiben bestehenden Ringe quer zur Strömungsrichtung der Luft praktisch keine Ausdehnung besitzen.The present invention relates to a construction of such protective shields on electrical Machines that have a particularly low flow of cooling air to pass through Has resistance and also effectively suppresses the occurrence of eddy currents is. According to the invention, the protective shield consists of several in the direction of the machine axis disc-shaped rings arranged next to one another, between which there are spaces for passage the cooling air are left. The cooling air flows through the protective shield in a radial direction. The resistance of each Rings is particularly small for the cooling air to flow through, as it is made of sheet metal disks existing rings have practically no expansion across the direction of flow of the air.
Die Zeichnung veranschaulicht ein Ausführungsbeispiel der Erfindung, wobei die Ver- *o bindungsfahnen 3 zwischen dem Kommutator 2 und der zugehörigen Wicklung an einer Kommutatormaschine ι von einem Schutzschild umgeben sind. Dieser Schutzschild besteht aus mehreren nebeneinander mit Zwischenraum angeordneten Blechringen 4. Für die Distanzierung und für die Befestigung dieser BlecLringe dienen Bolzen 5, die aber mit Rücksicht auf ihre geringe Anzahl eine wesentliche Vermehrung des Widerstandes für das Hindurch treten der Kühlluft nicht herbeiführen. Die Kommutatorfahnen kann man in axialer Richtung zusätzlich vergrößern und sie zur Überleitung der auf der Kommutatorfläche erzeugten Verlustwärme an die Kühlluft benutzen. Es ist aber dabei erforderlich, daß zwischen den Kommutatorfahnen ein kräftiger Kühlluftstrom hindurchtritt. Der Schutzschild gemäß der Erfindung ermöglicht die Ausbildung eines besonders kräftigen Kühlluftstromes zwischen den Kommutatorfahnen,· da sein Widerstand für die Kühlluft besonders gering ist.The drawing illustrates an embodiment of the invention, where the * o binding lugs 3 between the commutator 2 and the associated winding on a commutator machine ι are surrounded by a protective shield. This protective shield exists of several sheet metal rings arranged side by side with a gap 4. For spacing and bolts 5 are used to fasten these sheet metal rings, but with consideration for their small number significantly increases the resistance to the passage of the Do not induce cooling air. The commutator lugs can also be used in the axial direction enlarge it and use it to transfer the heat loss generated on the commutator surface to use the cooling air. But it is necessary that between the commutator lugs a strong flow of cooling air passes through it. The protective shield according to the invention enables the formation of a special strong cooling air flow between the commutator vanes, because its resistance for the cooling air is particularly low.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES95024D DE512648C (en) | Protective shield for electrical machines with openings for the passage of cooling air in the radial direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES95024D DE512648C (en) | Protective shield for electrical machines with openings for the passage of cooling air in the radial direction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE512648C true DE512648C (en) | 1930-11-15 |
Family
ID=7519092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES95024D Expired DE512648C (en) | Protective shield for electrical machines with openings for the passage of cooling air in the radial direction |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE512648C (en) |
-
0
- DE DES95024D patent/DE512648C/en not_active Expired
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