Electric motor having a coaxially arranged pump

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 29/04 (2006.01) F16F 15/30 (2006.01)

Patent

CA 2612965

The invention relates to an electric motor (1) having a coaxially arranged pump (6) for a coolant circuit, in particular in a system with temperature transfer or heat transfer. Within housing parts (7, 10) which are configured as a hermetically sealed pressure enclosure, a shaft assembly (5) transmits a torque from the electric motor (1) to at least one impeller (8) which is arranged in the pump housing (7), and a flywheel (12) is arranged between the electric motor (1) and the pump housing (7). All the rotating parts are arranged within a hermetically sealed motor/pump assembly, and the motor/pump assembly is filled with fluid. Here, the flywheel (12) comprises a flywheel body (13) having a multiplicity of cavities (16, 17) and having heavy- metal inserts (16, 17) which are arranged in the cavities. A heavy metal having a density of greater than 11.0 (kg/dm3) forms the heavy-metal inserts or is arranged therein, and the flywheel body (13) is composed of a high-strength material.

L'invention concerne un moteur électrique (1) doté d'une pompe (6) coaxiale, destiné à un circuit de refroidissement, notamment d'une installation pourvue d'un transfert de température et/ou d'un transfert de chaleur. A l'intérieur d'éléments boîtier (7, 10) réalisés sous la forme d'enveloppes sous pression d'étanchéité hermétique, une ligne d'arbres (5) transmet un couple du moteur électrique (1) à au moins un rotor (8) monté dans le boîtier de pompe (7). Un volant d'inertie (12) est monté entre le moteur électrique (1) et le boîtier de pompe (7). Toutes les parties rotatives sont montées dans un ensemble moteur-pompe d'étanchéité hermétique et l'ensemble moteur-pompe est rempli de liquide. Le volant d'inertie (12) est constitué d'un corps volant d'inertie (13) doté de plusieurs cavités (16, 17) et d'inserts de métal lourd (16, 17) logés dans les cavités. Un métal lourd d'une densité supérieure à 11,0 (kg/dm<SUP>3</SUP>) forme les inserts de métal lourd ou bien est logé dedans et le corps volant d'inertie (13) est constitué d'un matériau à haute rigidité

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