Pressure automatic adjusting device for dive motor

Abstract

The invention provides an automatic pressure regulating device for a submersible motor, which is characterized in that the device comprises a pressure regulating chamber connected with the end portion of the submersible motor and communicated with the inner cavity thereof, water diversion holes are equipped between the pressure regulating chamber and the inner cavity of the submersible motor, overflow holes are equipped at the wall of the pressure regulating chamber, and cooling medium water or oil is filled in the pressure regulating chamber. Compared with the existing submersible motor protecting device, the invention has the following advantages: (1) simple structure, large pressure regulation volume, high strength, and good safety and reliability; (2) capability of directly replacing the rubber diaphragm pressure regulating device without changing the outline dimension and internal structure of the motor and on the premise of keeping the pressure regulation volume, and convenient application; and (3) that the device can be divided into three types: upper joint type, lower joint type and upper and lower joint type according to the joint mode with the submersible motor and a water pump, and has convenient processing method. When the pressure in the inner cavity of the submersible motor exceeds certain value, the buffer action through the expansion of the medium in the chamber equalizes pressure, so that the bearing and the coil in the inner cavity of the submersible motor are soaked in the cooling medium all the time, thereby improving the service life of the motor. The invention is particularly suitable for underground thermal water operation in harsh working environment.

Description

technical field [0001] The invention relates to an automatic pressure adjustment device for a wet submersible motor, especially suitable for a series of hot water submersible motors, and belongs to the technical field of protective mechanical accessories for submersible motors. Background technique [0002] The wet submersible motor is filled with water or oil in the inner cavity of the submersible motor. The heat emitted by the bearing and the coil is transferred to the body through water or oil and then to the medium outside the body to achieve the purpose of heat dissipation. The water or oil itself heats up and expands as it transfers heat. In the original wet submersible motor, a pressure regulating membrane is added at the lower part to offset part of the expansion. When the load of the wet submersible motor is large and the temperature of the underground hot water is high, the problems that are likely to occur are: 1. The water or oil in the inner cavity expands and ...

AI Technical Summary

Problems solved by technology

When the load of the wet submersible motor is large and the temperature of the underground hot water is high, the problems that are likely to occur are: 1. The water or oil in the inner cavity expands and expands to a large volume. At this time, the pressure regulating membrane may be broken. 2. As the temperature rises, the overflow of water or oil will cause water shortage in the inner cavity of the motor; 3. The aging of the pressure regulating film at high temperature is also relatively fast, which will affect the life of the submersible motor

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