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US 6,305,692 B1Granted
Seal device
AssigneeITT Manufacturing Enterprises, Inc.
InventorUlf Arbeus
Life of this patent
Estimating the term…
Abstract
A seal device for a submersible machine, such as a pump or a mixer, the seal device being designed as an easily replaceable unit having two mechanical face seals parted by a room for a barrier liquid in which a pump impeller is located. The impeller circulates the barrier liquid passing the liquid along the seals and through cooling channels in the driving unit of the machine.
Claims3
A seal device in the form of an easily exchangeable unit for a rotary driving shaft between an electric motor and a hydraulic unit, the seal device comprising:
- two mechanical face seals with an intermediate room for a barrier liquid that also serves as a cooling medium for an associated electric motor;
- and
- a pump for circulating the barrier liquid, the pump being a half axial or axial type, the pump including:
- an impeller of a half axial or axial type having a plurality of vanes, the impeller to be attached on the driving shaft;
- a first group of stationary guide vanes located upstream of the impeller;
- and
- a second group of stationary guide vanes located downstream of the impeller.
4 more elements
Dependencies are inferred from the claim text.