Liquid-cooled electromotor

H - Electricity – 02 – K

Patent

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Details

H02K 9/19 (2006.01) F04B 17/03 (2006.01) F04B 53/08 (2006.01) F04C 15/00 (2006.01) H02K 5/20 (2006.01) H02K 5/173 (2006.01) H02K 7/14 (2006.01)

Patent

CA 2425051

A liquid-cooled electric motor with a motor shaft, with two bearing plates which are mounted on the end faces of the motor housing and which carry on each side at least one bearing, the motor shaft being mounted rotatably in the bearings, and with at least one rotating hydraulic pump, the drive shaft of which is connected to the motor shaft by way of a coupling and which is driven by the electric motor. The casing of the motor housing receives a cooling liquid, has an at least partially hollow design and forms a casing cavity. At least one connecting duct for the supply of cooling liquid from the casing cavity to the bearings for cooling and lubrication of the bearings is provided in each of the bearing plates and in that said flanged-on hydraulic pump is sealed off in a liquid-tight manner with respect to the bearing plate interiors.

Les mécanismes d'entraînement hydrauliques nécessitent des groupes moto-pompes compacts et performants. Pour ce faire, un moteur électrique et au moins une pompe sont, dans la mesure du possible, intégrés dans un même appareil. Cela présente cependant l'inconvénient que l'on ne peut intégrer au moteur qu'un seul type spécifique de pompe. Le moteur électrique selon l'invention permet de raccorder facilement différents types de pompes au moteur électrique sans pour autant renoncer aux avantages des groupes classiques, notamment au refroidissement et à la lubrification par liquide inhérents au moteur électrique. En effet, l'enveloppe du carter de moteur est, au moins partiellement, creuse pour recevoir un liquide de refroidissement et au moins un canal de raccordement, prévu dans les extrémités palier, est destiné à l'alimentation en liquide de refroidissement de la cavité de l'enveloppe jusqu'aux paliers.

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