Fluid pump system
AssigneeFramo Engineering AS
InventorsJørgen Eide, Aage Hadler-Jacobsen
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Abstract
A fluid pump system comprises an electrical drive unit and a rotary pump comprising a rotatable shaft and a drive element formed from a number of impellers attached to the shaft for causing flow within a process fluid. The electrical drive unit comprises an electrical stator and an electrical rotor attached to the shaft via a coupling, the electrical stator being disposed adjacent to the electrical rotor. The electrical stator is disposed within a first casing and the rotary pump and the electrical rotor are disposed within a second casing. The first casing contains a first fluid and the second casing contains a second fluid.
Claims10
A fluid pump system comprising an electrical drive unit and a rotary pump comprising a rotatable shaft and a drive element attached to the shaft for causing flow within a process fluid;
- the electrical drive unit comprising an electrical stator and an electrical rotor attached to the shaft;
- the electrical stator being disposed within a first casing and the rotary pump and the electrical rotor being disposed within a second casing;
- wherein the first casing contains a first lubricant fluid and the second casing contains a second lubricant fluid sealed from the process fluid and the arrangement being such that the electrical stator is disposed adjacent to the electrical rotor, wherein the fluid pump system comprises a second external fluid cooling circuit comprising an inlet section connected to the second casing and an outlet section connected to the second casing;
- at least one second impeller causing a flow of the second lubricant fluid from within the second casing through the second external cooling circuit.
Dependencies are inferred from the claim text.