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Cooling arrangement of a pump intended for pumping a liquid

  • US 10,030,670 B2
  • Filed: 12/02/2013
  • Issued: 07/24/2018
  • Est. Priority Date: 12/14/2012
  • Status: Active Grant
First Claim
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1. A pump for pumping liquid, comprising a drive unit and a heat sink connected to said drive unit, where the heat sink is arranged to carry off heat that is generated in said drive unit during operation of the pump, the drive unit comprising:

  • a motor compartment that in the radial direction is delimited by a motor casing and that accommodates an electric motor having a stator,a coupling compartment that is at least partly delimited by a pump top casing and that accommodates a power supply component,an upper partition that is arranged between said motor compartment and said coupling compartment,wherein the motor casing comprises;

    (i) an outer jacket that is connected to and extends between the upper partition and the heat sink in the axial direction,(ii) an inner stator housing that extends between the stator and the heat sink, and(iii) a gas filled gap that separates the outer jacket and the inner stator housing in the radial direction; and

    wherein the heat sink comprises a liquid seal chamber that is separate and isolated from the gas filled gap.

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