Vorrichtung zum äußeren Kühlen des elektrischen Antriebsmotors eines Kreiselpumpenaggregates

摘要

The invention relates to a device for the external cooling of the electric drive motor of a centrifugal pump unit. The invention is characterized in that the device (8) has a hermetically sealed hollow body (9) made of a heat-conducting material which at least partly surrounds the motor (3) in its circumference. The wall surfaces of the hollow body (9) on the motor and pump sides of same are in heat-conducting contact with the motor (3) and the centrifugal pump (1). The invention is also characterized in that the hollow body (9) is substantially filled with a fluid (11) which transmits the motor heat and is subjected to a natural circular convection current (22) when the motor is hot.