DE704030C

DE704030C - Arrangement for cooling completely encapsulated electrical machines operated at a relatively low speed

Info

Publication number: DE704030C
Application number: DE1937S0125608
Authority: DE
Inventors: Ludwig Hartwagner
Original assignee: Sachsenwerk Licht und Kraft AG
Current assignee: VEM Sachsenwerk GmbH
Priority date: 1937-01-09
Filing date: 1937-01-09
Publication date: 1941-03-21

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN Al
21. MÄRZ 1941ISSUE Al
MARCH 21, 1941

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

KLASSE 2Id¹ GRUPPE 57 oiCLASS 2Id ¹ GROUP 57 oi

S 125608 VIII dj2ΐό}S 125608 VIII dj2ΐό}

Ludwig Hartwagner in DresdenLudwig Hartwagner in Dresden

ist als Erfinder genannt worden.has been named as the inventor.

betriebener elektrischer Maschinenoperated electrical machines

Patentiert im Deutschen Reich vom o. Januar 1937 an Patenterteilung bekanntgemacht am 20. Februar 1941Patented in the German Reich from January 1st, 1937 Patent issued February 20, 1941

Bei elektrischen Maschinen ist es bekannt, zur Erzeugung des Innenkühlluftstromes der Maschine einen von einem besonderen Motor angetriebenen Lüfter zu verwenden, der mit höherer Drehzahl als die zu kühlende Maschine umläuft. Der mit höherer Drehzahl als die zu kühlende Maschine umlaufende Lüftermotor bewirkt hierbei eine Erhöhung der Umlaufgeschwindigkeit des Kühlluftstromes und infolgedessen eine ausreichende Kühlung des gesamten Maschinellaggregates.In electrical machines, it is known to generate the flow of internal cooling air Machine to use a fan driven by a special motor that works with higher speed than the machine to be cooled is rotating. The one with a higher speed than that The machine to be cooled revolving fan motor causes an increase in the speed of rotation of the cooling air flow and, as a result, sufficient cooling of the entire machine unit.

Erfindungsgemäß wird zwischen der Welle der zu kühlenden Maschine und der Welle des Lüftermotors eine Kupplung angeordnet, die bei einem Versagen des Lüftermotors die beiden Wellen selbsttätig miteinander kuppelt. Hierdurch wird eine wesentliche Erhöhung der Betriebssicherheit elektrischer Maschinen mit getrennt angetriebenem Lüfter erzielt, indem durch diese Kupplung immer Gewähr dafür gegeben wird, daß der Lüfter mindestens mit der Drehzahl der Welle der zu kühlenden Maschine umläuft und so eine Beschädigung der Maschine infolge ausbleibender Kühlung verhindert. Die Kupplung zwischen der Welle des Lüftermotors und derjenigen der zu kühlenden Maschine kann selbsttätig in der Weise erfolgen, daß der Lüftermotor als Motor mit einem bekannten Verschiebeanker ausgerüstet ist, dessen Welle während seines Betriebes von der Maschinenwelle getrennt ist.According to the invention, between the shaft of the machine to be cooled and the shaft of the fan motor arranged a clutch, which in the event of a failure of the fan motor automatically couples both shafts with each other. This is a substantial increase the operational safety of electrical machines with separately driven fans achieved by this coupling always ensures that the fan is at least running at the speed of the shaft to be cooled The machine rotates and thus prevents damage to the machine due to lack of cooling. The coupling between the shaft of the fan motor and that of the machine to be cooled can automatically done in such a way that the fan motor as a motor with a known sliding armature is equipped, the shaft of which is separated from the machine shaft during its operation is.

In der Zeichnung ist die beispielsweise Verwirklichung des Erfindungsgedankens bei einem bekannten, vollständig gekapselten, in einem Wasserlauf angeordneten Turbinenoder Pumpenaggregat mit einer in das Kapselgehäusc eingebauten elektrischen Maschine gezeigt. Der Generator 1 ist in bekannter Weise durch seinen Gehäusemantel 2 und 40 durch Kappen 3 und 4 vollkommen wasserdicht abgeschlossen. Der Rücken des Ständerblechpakets s liegt in bekannter Weise direkt am Gehäuses an. 6 sind bekannte, über den ■In the drawing, for example, the implementation of the inventive concept is at a known, fully encapsulated turbine or turbine arranged in a watercourse Pump unit shown with an electrical machine built into the capsule housing. The generator 1 is known in Way through its casing 2 and 40 through caps 3 and 4 completely waterproof closed. The back of the stator core s lies directly in a known manner on the housing. 6 are well-known about the ■

Claims

Axial air ducts distributed around the circumference of the laminated core. The interior of the machine, which is formed by the housing 2 and the two end plates 9 and 10 is, is through annular partitions 11, 12 in an inner part 13, which extends over the Winding is enough, and an outer part 14 divided. Both rooms ij and 14 will be in the opposite direction from the previous one Air flows through it. Fan 15 and JO are used to support the flow of air in the direction indicated by arrows. Annular walls 7 and S are used for guidance of the circulating air flow. On the end shield 9 of the generator 1 is known in Way, a special motor 17 is arranged with a fan 1S driven by this. The fan J 8 is operated in a known manner with a speed above the generator speed

ao speed operated. It is thereby achieved in a known manner that one for the discharge The amount of air that is sufficient for the heat loss is circulated and on the cooling surfaces of the capsule housing is passed.

LTm in the event of a failure of the motor 17 To be able to operate generator 1 with part of the load is the shaft of the fan motor 17 can be coupled to the generator shaft 19 set up. This coupling takes place advantageously automatically. For example, the armature of the motor 17 in be It is known to be designed as a sliding anchor that does not work with the generator shaft 19 is coupled. Do not couple until the fan motor fails the two waves with each other. However, the automatic clutch can also be used be done in any suitable manner.

Ρλ τ κ ν τ λ ν s i'K i: c η ε: ⁴ "

i. Arrangement for cooling completely encapsulated, with relatively less Speed of electrical machines operated by a fan driven by a special motor, which the internal cooling air flow generated and rotates at a higher speed than the machine to be cooled, characterized in that between the shaft (19) of the machine to be cooled (1) and the shaft of the fan motor (17) a coupling (20) is arranged. those in the event of a fan motor failure (17) automatically couples the two shafts with one another.

2. Arrangement according to claim 1, characterized in that the fan motor (17) is a sliding armature motor, whose shaft from the machine shaft during its operation (19) is separated.

1 sheet of drawings