SU145651A1 - Device for ventilation of electrical machines - Google Patents

Description

The present invention relates to devices for ventilation of electric machines using a ventilation motor equipped with an impeller.

The proposed device differs from the known ones in that the ventilation motor is mounted on the side of the slip rings and its shaft is located perpendicular to the shaft of the ventilated machine.

This embodiment of the device eliminates the need to lengthen the ventilated machine and provides the possibility of increasing the diameter of the impellers.

FIG. 1 depicts an electric ventilated machine; in fig. 2 is the same; the section along A-A in FIG. one.

In the space under the shaft on the side of the bearing bracket /, where the contact rings of the electric machine (Figs. 1 and 2) are located, a ventilation motor 2 is installed with two shaft ends so that the axis of the ventilation motor 2 is perpendicular to the plane the axis of the electric machine, and both axes may have a common intersection point. At the ends of the shaft of the ventilation electric motor 2, centrifugal impellers 3 and 4 are fixed, suctioning air through both side openings 5 and 6 of the cover 7, closed by grills 7 and 5, and forcing it into the inside of the electric machine. Cooling air exits through hole 9 in cover 10.

With the closed version of the electric machine, such a device is equipped with a heat exchanger with external and internal channels and cooling fins. Cooling air is sucked from the internal channels, injected into the electric machine, flows back into the internal channels on the other side of the heat exchanger and transfers heat to the cooling fins.