Amphibious pump

Abstract

An amphibious pump is provided including a wet type motor with coolant and an absorbing mechanism of the expansion of the coolant inside the motor chamber, dividing it into two chambers, at least one expansion joint between an internal chamber of the motor, hermetically closed, and an equalization inner chambers and a means to equalize the internal pressure for the pumped fluid. The electric motor is immersed m a cooling liquid, usually oil, in a chamber, and, the other camera is filled with the aqueous solution, which communicates with the outside through the equalizer assembly, which can, for example, comprise a rubber mask with micro holes, which allows the exchange of water between the outer chamber and the chamber of the motor.

Description

TECHNICAL FIELD[0001]The present disclosure refers to a fluids pump which can work submerged or not, being generally known in the state of art as amphibious, equipped with art wet type electric motor filled with coolant typically an oil, which allows pumping fluids of high and low temperature and which operates at high pumping pressures. It has the application equipment in various areas, such as sanitation, mining, steelmaking, ethanol plants, industrial processes and others.BACKGROUND OF RELATED ART[0002]The state of art particularly refers to the submerged pumps with dry-type electric motors. In this type of pump the motor is protected by a mechanical seal system, which turns out to be a limiting factor in the pressure level that the pump can operate, as in the case of high pressures external to the motor housing runs the risk of breaking this mechanical seal, causing damage to the windings and motor bearings.[0003]In relation to the dry type pumps belonging to the state of techno...

AI Technical Summary

Benefits of technology

[0012]But these pumps are limited to working with low temperature fluids and only with low voltage motors, in Brazil up to 1000 volts. In applications where the fluid to be pumped has a higher temperature and/or associated only with the supply of medium voltage (above 1000 volts up to 5000 volts) to drive the pump, the fluid to be used in the camera of the motor consists of a coolant which bears, no icing, low temperatures, and no boiling, high temperatures, normally oil. Such a need is known in the state of technology, because In

Problems solved by technology

In this type of pump the motor is protected by a mechanical seal system, which turns out to be a limiting factor in the pressure level that the pump can operate, as in the case of high pressures external to the motor housing runs the risk of breaking this mechanical seal, causing damage to the windings and motor bearings.

However, despite the totally dry submersible motor pump be capable of working under higher pressure conditions, it has its performance limited.

In addition, the totally dry submersible motor pump proposed by the PI8900494-9 presents an extremely complex assembly, with a considerable amount of components, which makes its cost of manufacturing and assembling high.

But these pumps are limited to working with low temperature fluids and only with low voltage motors, in Brazil up to 1000 volts.

Such a need is known in the state of technology, because In motors like this there i

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