Pump and drive unit with drive cooling by means of the pumped liquid

摘要

The pump has a housing (1-19) that is double-shelled or channeled in the region of a drive (20) for carrying pump liquid to carry heat from the drive and bearings away from the drive interior space (3). The pump liquid is sucked by the pump (40) and flows through the housing, without intermediate storage. A circuit is provided for carrying the pump liquid out of the pump unit. The circuit includes a tank which is external to the pump unit.