Pump unit with cooling jacket for electric motor

Details Pump unit with cooling jacket for electric motor Pump unit with cooling jacket for electric motor

1992-06-26

1994-07-26

Bertsch, Richard A.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

4174238, F04B 1700

Patent

active

053323696

ABSTRACT:
A pump unit especially for heat producing and heat distributing plant has an electric motor having a rotor which is sealed against the fluid conveyed by the pump unit. The electric motor which is cooled by the conveyed fluid drives a rotary pump for controlling the speed of the unit. Part of the stream of the conveyed fluid which is diverted for cooling the electric motor and the frequency converter, flows through a cooling jacket which receives the motor. The frequency converter is attached to the outside of the cooling jacket in heat conducting relationship therewith and the frequency converter and the motor are received in a common housing.

REFERENCES:
patent: 2784672 (1957-03-01), Wallace
patent: 4213745 (1980-07-01), Roberts
patent: 4465437 (1984-08-01), Jensen et al.
patent: 4726746 (1988-02-01), Takada et al.
patent: 4834624 (1989-05-01), Jensen et al.
patent: 4854829 (1989-08-01), Stanzani et al.
patent: 4998865 (1991-03-01), Nakanishi et al.

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