FIELD: electrical engineering.
SUBSTANCE: invention relates to, in particular, to designs of electric machines with external winding of finned case and can be used, for example, in asynchronous engines of general purpose. Electric machine comprises bearing shield, shaft with end face axial hole at depth of fan mounting and holes in radial direction through fan sleeve and wall of hollow part of shaft of electric machine between disc and bearing shield, jacket closing fan and part of housing of electrical machine. In the cylindrical part of the casing an annular bulge is made facing the rotation axis of the electric machine. Annular bulge is located opposite gap between bearing shield and fan disc. It is made in the form of part of arc of circle and arc radius of circle is within 0.1 to 0.5 of height of cooling rib of housing of electric machine.
EFFECT: technical result is increased intensity of electric machine cooling.
4 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
SU1170555A2 |
| ELECTRICAL MACHINE | 2000 |
|
RU2173018C1 |
