Dry-pit submersible pump and liquid transfer method

Details Dry-pit submersible pump and liquid transfer method Dry-pit submersible pump and liquid transfer method

F - Mech Eng,Light,Heat,Weapons

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F04B 49/00 (2006.01) F04B 47/06 (2006.01) F04B 49/02 (2006.01) F04B 53/08 (2006.01) F04D 13/08 (2006.01) F04D 25/08 (2006.01) F04D 29/24 (2006.01) F04D 29/26 (2006.01) F04D 29/58 (2006.01) H02K 5/124 (2006.01) H02K 5/132 (2006.01) H02K 9/00 (2006.01) H02K 9/14 (2006.01) H02K 9/19 (2006.01)

Patent

CA 2248849

A dry-pit submersible pump using a totally enclosed fan-cooled (TEFC) electric motor to power the pump. A release mechanism prevents the fan from creating excessive drag when submerged in water. The fan cools the motor when the water level is below the motor, and the surrounding water combines with the fan to cool the motor when the water level rises to at least partially surround the motor. When the fan is at least partially submerged, the release mechanism substantially prevents the fan from imposing a load on the motor due to the surrounding water. The release mechanism can take the form of a shear key, a torque-release clutch or flexible fan blades.

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