SU1510048A1 - Electric machine - Google Patents

Abstract

The invention relates to electrical engineering and can be used in asynchronous motors with radial internal ventilation. The purpose of the invention is to increase the cooling efficiency by equalizing the temperature along the length. The refrigerant leaving the fans 13 enters the frontal parts 11 of the stator winding 1 and the axial channels 5 of the packets 4, from where it enters the radial channels 8 and the axial holes made in the additional ventilation packages 6 of the outermost parts 9 of the magnetic circuit. Then, from the radial channels 8, the coolant flow streams enter the radial channels 2 and axial channels 5, and from the axial holes only flow into the axial channels 5. From the axial channels 5, the refrigerant flows into the radial channels 8, then into the radial channels 2 of the stator 1. From the frontal parts 11 and radial channels 2 refrigerant enters the annular space of the heat exchanger 14 and then into the fans 13. 3 sludge.

Description

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The invention relates to electrical engineering and can be used in asynchronous electric motors with radial internal ventilation.

The purpose of the invention is to increase the cooling efficiency by inflating the temperature along the length.

FIG. 1 depicts the proposed electric machine, a longitudinal section; in fig. 2, section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 1. The electric machine contains a stator 1 with radial channels 2, a rotor 3 having main packages 4 of the magnetic circuit with axial channels 5 and additional ventilation packages 6 and 7 located between them, equipped with radial channels 8 in the form of open grooves, which communicate with axial channels 5. In the additional ventilation packages 6 extreme parts 9 of the rotor magnetic core 3, axial holes 10 are made, which alternate with radial channels 8 of these packages and communicate with axial channels 5. Radial channels 8 with 5 main packages 4 of the rotor 3 cores and radial channels 2 of the stator 1 are axial channels. Under the frontal parts 11 of the stator winding 1 axial fans 13 are installed on the shaft 12 of the rotor 3. A tubular heat exchanger 14 is placed along the perimeter of the stator 1 15 rotor magnetic cores 3, the radial channels 8 alternate with each groove 16 for the winding, and in its extreme parts - every two grooves 16 for the winding. The radial channels 8 are located between the slots 16 for the winding, and the holes 10 in the additional ventilation bags 6 are located in the area of their backrest 17. External air is blown through the tubes of the heat exchanger 14 by the fan 18 (the circulation of the outside and internal air is shown by arrows)

The refrigerant leaving the fan 13 enters the frontal parts 11 of the stator winding 1 and the axial channels 5 of the packets 4 located in the edge parts 9 of the roO magnetic core

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torus 3, from where it enters the radial channels 8 and the axial holes 10 of the additional ventilation packages 6, then from the radial channels 8 of the packages 6 the refrigerant flow enters the radial channels 2 of the stator 1 and the axial channels 5 of the packages 4 located in the middle part 15 of the rotor magnetic core 3 , and from the axial holes 10 of the packages 6, the refrigerant flow enters only the axial channels 5 of the packages 4 located in the middle part 15 of the rotor magnetic core 3, from where the refrigerant enters the radial channels 8 of the packages 7, and then the radial channels 2 stator a 1. From the frontal parts 11 and the radial channels 2 of the stator 1, the refrigerant flow enters the annular space of the heat exchanger 14, from where it is directed to the fans 13.

The invention makes it possible to improve the temperature distribution along the length of the electric machine while simultaneously increasing the cross section of the active steel of the rotor core, as a result of which the cooling efficiency and the use of electrical steel are increased.

Claims (1)

Invention Formula An electric machine with radial-axial internal ventilation, containing a stator with radial channels, a rotor, grinding main packages of the magnetic circuit with axial channels and additional ventilation packages located between them with radial channels in the form of grooves open to the periphery, communicating axial channels, - that in order to increase the cooling efficiency - by equalizing the temperature along the length, additional ventilation packages located in the extreme parts of the magnetic core, They are provided with axial channels alternating with radial channels and communicating with axial channels of the main packages. A- / I 17 Phil 2 5-5 sixteen fig.Z