A temperature detection device and detection method for a stator winding of a submersible motor

Abstract

The invention discloses a device and a method for detecting the temperature of a submersible motor stator winding. The device comprises a thermoelectric couple, a heat conducting element and a heat conducting joint, the heat conducting element and the heat conducting joint are insulated from the stator winding, the heat conducting element is embedded into a submersible motor stator core slot and contacts with the stator winding in a heat conducting manner, a portion of the heat conducting element extends out of the stator core slot and is fixedly connected with one end of the heat conducting joint, and the other end of the heat conducting joint is fixedly connected with a thermoelectric couple measuring head and can be split from the thermoelectric couple measuring head. By embedding the heat conducting element fixedly connected with the heat conducting joint into the submersible motor stator core slot, the temperature of the stator winding is detected by measuring the heat conducting joint through the thermoelectric couple. The device is simple in mounting process, detachable, and simple and convenient to maintain and replace. Besides, the device is applicable to detecting the temperature of the winding in the submersible motor stator core slot, can be individually used for a certain phase winding, and can also be simultaneously used for three-phase windings.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a temperature detection device and a detection method for a stator winding of a submersible motor. Background technique [0002] The submersible electric motor is the heart of the entire submersible electric pump system, which drives the submersible centrifugal pump to extract underground crude oil. The submersible motor is a three-phase squirrel-cage asynchronous motor, which works in a special environment thousands of meters underground and has the characteristics of high temperature, high pressure and corrosion. In a complex working environment, in order to ensure the normal operation of the motor, it is most important to master the temperature distribution of the motor. At present, all embedded temperature detectors are used to measure the temperature of stator windings. The embedded temperature detectors can be resistance type or thermocouple type, and resistance type is mor...

AI Technical Summary

Problems solved by technology

(Deleted, the statement is wrong) Due to the limitation of the operation process, the embedded position of the temperature measuring resistance element can only be close to the end of the winding, and the measured temperature is the temperature of the end of the winding or the temperature of the motor oil, which cannot meet the requirements of accurate winding temperature measurement , the highest temperature of the winding cannot be detected, and because the embedded temperature detector is affected by factors such as the embedded position, the length of the temperature measuring element itself, and the embedded process, the measured temperature is often very different from the actual temperature. At present, the stator windings of submersible motors manufactured by most manufacturers use the dipping and pouring process. The embedded temperature detector cannot accurately measure the temperature of the stator windings, and the installation process is complicated. The thermal resistance wire is thin and easy to break, which is inconvenient for maintenance.

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