SU1365255A1 - Submersible liquid-filled electric motor - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase reliability. The submersible liquid-filled electric motor comprises a rotor 2 with a shaft 3, a stator 1 and a cooler connected to the internal cavity 19 of the electric motor by means of an inlet and an outlet 18 holes. Due to the fact that the electric motor is equipped with a compensator, which includes an elastic diaphragm 15 mounted on the frame and having an internal cavity 17 connected to the cavity 19 of the electric motor, the achievement of the set goal is ensured. 1 yl. (L

Description

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The invention relates to the field of electric machines, in particular, to submersible liquid-filled electric motors for driving pumps, and relates to the cooling of electric machines.

The purpose of the invention is to increase reliability.

The drawing shows the proposed motor, cut.

The electric motor contains a stator 1, a rotor 2 with a shaft 3, in which longitudinal (central) 4 and radial 5 channels are made, an injection device 6, for example, an impeller that circulates the fluid, a seal 7 separating the internal cavity of the electric motor

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ZA 24 of the stator 1, the inlet pipe 25 and the opening 26 of the tube of the refrigerator 9, the pipe 10, the channel 27 in the sleeve 11, the internal cavity 17 of the diaphragm 15, the radial holes 14 and the central hole of the pipe 13, the channel 18 in the sleeve 12, the internal cavity 19 of the electric motor, channels 4 and 5 of the shaft 3.

In the process of operation, under the action of rotation of the rotor 2, the injection device 6 creates pressure, ensuring

the baking circulation of fluid inside the electric motor along the cooling circuit. The direction of movement of the circulating fluid is indicated by arrows. The fluid circulating in a closed circuit is intense

environment, the cap 8 in the longitudinal channel 2o is cooled in the internal cavity 17

4 shaft 3, installed behind the injection device 6, tubular cooler 9, connected by pipe 10 to sleeve 11, which is rigidly connected to sleeve 12 by means of a tube 13 having radial holes 14 connected to the central hole of a tube 13. Sleeves 11 and 12 and the tube 13 forms a frame for the elastic diaphragm 15, which is attached to the sleeves 11 and 12.

The sleeve 12 is installed in the flange 16 fixed to the stator housing 1. The internal cavity 17 of the diaphragm 15 is connected to the internal cavity 19 of the electric motor by means of the radial holes 14 and the central opening of the tube 13 and channel 18 in the sleeve 12 representing the output pipeline.

The elastic walls of the diaphragm 15 are outwardly in contact with the environment between the tubes of the refrigerator 9 to ensure intensive heat exchange of the fluid in the chamber of the diaphragm with the environment and to compensate for temperature variations in the volume and flow rate of the liquid inside the electric motor.

The diaphragm 15 is protected from mechanical damage by the housing 20 with openings 21, which ensure free access of environmental fluid to the outer walls of the diaphragm.

The closed loop cooling of the electric motor includes an injection device 6, the frontal part of the stator winding 22, the air gap 23 in the padiaphragm and in the tubes of the refrigerator 9.

When the pressure of the fluid inside the motor changes relative to the external environment, and also when the pressure of the external environment changes, the elastic walls of the diaphragm 15 deform, compensating for these changes.

The proposed design of an electric motor makes it possible to increase the reliability of an electric motor due to the intensification of its cooling, and while maintaining the value of reliability indicators, using the invention will increase the efficiency, reduce material consumption and labor intensity of production, simplify maintenance and repair of the electric motor.

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Claims (1)

Invention Formula A submersible liquid-filled 45 electric motor containing a stator, a rotor with a shaft having longitudinal and radial channels, a cooler connected to the internal cavity of the electric motor with the help of an inlet gQ and outlet openings with the formation of a closed cooling circuit, To increase reliability, it is equipped with a pressure compensator, containing gj cylindrical diaphragm made of elastic material, mounted on a frame that includes a sleeve in which the outlet of the refrigerator is located, the tube is cooled in the internal cavity 17 the diaphragm and in the tubes of the refrigerator 9. When the pressure of the fluid inside the motor changes relative to the external environment, and also when the pressure of the external environment changes, the elastic walls of the diaphragm 15 deform, compensating for these changes. The proposed design of an electric motor makes it possible to increase the reliability of an electric motor due to the intensification of its cooling, and while maintaining the value of reliability indicators, the use of the invention will increase the efficiency, reduce material consumption and laboriousness of manufacture, simplify maintenance and repair of the electric motor. thirty 35 40 Invention Formula A submersible liquid-filled 45 electric motor containing a stator, a rotor with a shaft having longitudinal and radial channels, a cooler connected to the internal cavity of the electric motor with the help of an inlet gQ and outlet openings with the formation of a closed cooling circuit, To increase reliability, it is equipped with a pressure compensator, containing gj cylindrical diaphragm made of elastic material, mounted on a frame that includes a sleeve in which the outlet of the refrigerator is located, a tube having openings in the cylindrical wall with an additional sleeve, the inner cavity of the diaphragm being connected through the openings of the tube to the inner cavity of the electric motor.