SU1171908A1 - Electric machine - Google Patents

Abstract

1. ELECTRICAL MACHINE, comprising a housing, stator and rotor cores, each of which is divided in the middle part by a radial channel, a stator winding with frontal parts and radial partitions adjacent to them on the outer side, cylindrical partitions placed above the stator core with the formation of axial channels between the skirts 17 5 15 8 7 / J camps and the stator core, fans installed under the frontal parts of the stator winding and mounted on the rotor, the core of which has axial ventilation tubes In order to increase cooling efficiency by equalizing the temperature along the electric maschine, additional radial channels are made in the stator and rotor cores, and on the axial channels of the stator core from the middle radial channel and axial channels of the rotor core from fans installed additional radial partitions closing them. 2. The machine according to claim 1, characterized in that in the space between the stator cores and the cylindrical partitions are located the air ducts connected to the middle radial channel. // 1Л I, 12 13 10 i Fee-y. /

Description

The invention relates to electrical engineering and relates to the improvement of the cooling of electrical machines.

The aim of the invention is to increase the cooling efficiency by equalizing the temperature along the length of the electric machine.

FIG. 1 shows an electric machine, a longitudinal section; in fig. 2-4 are embodiments of an electric machine.

The electric machine consists of a housing, bearing SHITS 2, heat exchanger 3, fans 4, central radial channel 5, stator cores b divided by radial channels 7 into separate packages 8, stator windings 9, rotor cores 10 separated by channels 11 into separate packages 12 The axial channels of the rotor 13 are closed from the side of the fans 4 by additional radial partitions 14. The cylindrical partitions 15 are installed above the cores of the stators 6 with the formation of axial channels 16 closed from the center radial channel ceiling elements 5 additional radial partitions 17. In the region of the coil ends of the stator windings 9 are radial partitions 18. FIG. 2 shows the option of installing additional cylindrical partitions 19 in axial channels 16 above the cores of the stators 6 between the surface of the core and the cylindrical partition 15 adjacent to the radial partitions 17 and the section of the axial channels 16 along the electric machine into two parts. At that, axial channels 20 formed between two cylindrical partitions 15 and 19 are open from the side of the central radial channel 5, and axial channels 21 between the additional cylindrical partition 19 and the core are closed.

FIG. 3 shows a variant of the installation of pipes 22 in axial channels between the cores of the stators 6 and the cylindrical partition 15 adjacent to the radial partitions 17 with the formation of open channels 23 through said pipes from the central radial channel 5.

FIG. 4 shows the installation of pockets 24 adjacent to the cylindrical partitions 15 and radial partitions 17, forming open channels 25 from the side of the central radial channel 5.

When the refrigerant moves (shown by arrows in Fig. 1), the refrigerant exits the heat exchanger 3, passes through the central radial channel 5, enters the axial channels of the rotor 13, which is divided into a number of flows and passes through the radial channels 11 and 7, falls into the axial channels 16, and then, connected to the common flow, passes through the lattice of either parts of the stator winding 9 and enters the input of the fans 4. From the fans, the refrigerant flows through the channels between the bearing shield 2 and the radial partition 18 into the heat exchanger 3, further qi CL is repeated.

Thus, the separation of the cores of the stator 6 and the rotor 10 by the radial channels 7 and 11 into separate packages 8 and 12, the execution of the axial channels of the rotor 13 from the fans 4 and the axial channels 16 from the central radial channel 5 to reduce the maximum heating stator winding by supplying a significant part of the cooled air into the central radial channel, to ensure the alignment of the temperature field along the length of the electric machine and to increase the cooling efficiency of the active parts of the stator and p torus. Figures 2-4 show design variants in which the refrigerant, the outlet from the heat exchanger 3, is divided into several streams: one part of the refrigerant enters the central radial channel 5 and further as described, and the second part of the refrigerant flows respectively into the axial channels 20 , 23 and 25, open from the side of the central radial channel 5, exit from these axial channels, enter the grill of the frontal parts of the stator winding 9 and, cooling it, flow to the fans 4.

The invention allows to reduce the maximum heating of the stator winding and equalize the temperature field along the length of the electric machine.

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Claims (2)

1. ELECTRICAL MACHINE, comprising a housing, stator and rotor cores, each of which is separated in the middle by a radial channel, a stator winding with frontal parts and radial partitions adjacent to them from the outside, cylindrical partitions placed above the stator core with the formation of axial channels between re FIG. 1 by stator towns and core, fans installed under the frontal parts of the stator winding and mounted on the rotor, the core of which has axial ventilation channels, characterized in that, in order to increase cooling efficiency by equalizing the temperature along the length of the electric machine, the stator and rotor cores are made additional radial channels, and on the axial channels of the stator core from the side of the middle radial channel and on the axial channels of the rotor core from the fans side anovleny closing of additional radial partitions. 2. Machine by π. 1, characterized in that g in the space between the stator cores and the cylindrical partitions are air ducts connected to the middle radial channel. SU. „L 171908>