A method and device for cooling a subsea motor

Abstract

The invention relates to a cooling method and device for a deep-sea high-power motor, which is characterized in that it includes a heat exchanger composed of a motor shell and a heat-exchange tube. The seawater in the heat exchange tube exchanges heat with the fluid medium (oil or water) in the motor casing to take away the heat, and the fluid medium in the casing cools the motor; the seawater in the heat exchange tube is flowing; The motor is coaxial and is realized by a pump submerged in seawater; the device for realizing the method includes: a motor casing, a heat exchange tube, a pump chamber installed on the front cover of the motor, an output shaft connected to the output end through a key, and installed on the pump The impeller in the room is installed on the front end cover of the pump chamber, and it is characterized in that: the motor casing is a double-layer casing, one end of the heat exchange tube communicates with seawater through the opening on the casing, and the other end passes through the opening on the casing through the connecting pipe 1. The front end cover of the pump chamber communicates with the inlet of the impeller; the outlet of the pump chamber directly communicates with sea water, and the impeller is directly mounted on the motor shaft through a key. The invention has the advantages of simple structure, high heat exchange efficiency and high reliability, and can make full use of existing motors for transformation. Therefore, it can effectively solve the cooling problem of deep-sea high-power motors and meet the requirements of long life and thermal stability.

Description

technical field [0001] The invention relates to a cooling method for a subsea motor, in particular to a cooling method and device suitable for deep-water high-power motors. Background technique [0002] With the continuous development of my country's marine economy and the continuous improvement of marine exploration and development capabilities, especially deep-sea mining and deep-sea oil exploration and development, the demand for high-power motors that can work in a 3000m deep-sea environment is becoming more and more obvious. However, the deep-sea working environment puts forward higher requirements on the long life and thermal stability of high-power subsea motors. The internal heat exchange of the motor directly affects the life and performance of the motor. The traditional air cooling and the use of cooling medium circulation to take away the heat of the casing are limited in the seabed, and the cooling of high-power motors by seawater natural convection is far from ...

AI Technical Summary

Problems solved by technology

The traditional air cooling and the use of cooling medium circulation to take away the heat of the casing are limited in the seabed, and the cooling of high-power motors by seawater natural convection is far from being able to meet the requirements of motor development for winding temperature rise design. A new cooling method is needed to solve the cooling problem of deep-sea high-power electric motors

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