Pump unit with cooling jacket for electric motor
First Claim
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1. A pump unit, comprising:
- a rotary pump for producing a stream of fluid to be conveyed by the pump unit;
an electric motor having a rotor drivingly connected to the rotary pump and being sealed against ingress of said fluid;
a cooling jacket circumferentially surrounding the electric motor for receiving fluid diverted from said fluid stream as cooling fluid;
a frequency converter for controlling the speed of the electric motor and being connected to an exterior portion of the cooling jacket in heat conducting relationship therewith; and
a common motor housing receiving the frequency converter and the electric motor.
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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.
45 Citations
10 Claims
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1. A pump unit, comprising:
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a rotary pump for producing a stream of fluid to be conveyed by the pump unit; an electric motor having a rotor drivingly connected to the rotary pump and being sealed against ingress of said fluid; a cooling jacket circumferentially surrounding the electric motor for receiving fluid diverted from said fluid stream as cooling fluid; a frequency converter for controlling the speed of the electric motor and being connected to an exterior portion of the cooling jacket in heat conducting relationship therewith; and a common motor housing receiving the frequency converter and the electric motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification