SU389599A1 - - Google Patents

Description

ELECTRIC MACHINE WITH GAS COOLING

one

In a known gas machine with gas cooling, containing a core equipped with radial channels, dividing its packages, axial channels made in the grooves, spacer elements installed along the radial channels along the entire circumference of the core with an interval in the groove division, and partitions placed across the radial channels and serving to direct the cooling agent from the radial channels c. axial, uneven cooling of the winding and the core is observed.

In order to increase the intensity of cooling, the proposed electrical equipment is rigidly connected to the spacer elements and installed oppositely within each pair of adjacent spacer elements, the partitions of two adjacent radial channels being 180 ° offset from each other, besides, in the area of each spacer element located in the slot area, the hole is made.

FIG. Figures 1 and 2 show longitudinal sections of two versions of gas-cooled rotor designs; on phage. Figures 3 and 4 show cross sections of the rotor of two design variants.

A shaft consisting of separate packages J, between which radial ventilation channels 4 are provided, is mounted on the shaft 1, which has on the outer surface axial ventilation grooves 2. The winding 5 is laid in the grooves of the core, and an axial ventilation channel is provided at the bottom of each groove b, co-optically with radial channels 4. Each of the spacer elements 7 installed in the radial channels 4, on the one hand, has a smooth surface, and on the other hand is provided with a partition 8, designed for smooth rotation, cooling gas in its axial channel 6. Moreover Recess portion on the spacer element is located in the slot area at the level of the grooves, an aperture 9 for the cooling gas flow (in FIG. 1 and FIG. 3, its direction is indicated by dotted arrows). Spacer elements 7 with partitions 8 placed in the zone of entry of the cooling gas into the axial channels form, during rotation of the rotor in each radial ventilation duct, 4 alternating zones 10 of relatively high pressure and // zones of relatively low pressure. Moreover, each zone 10 with respect to high pressure, located in one radial channel 4, is connected with zone // relative to H: I31c pressure, located in the adjacent radial channel 4, through the axial slot channel 6.

A constructive feature of the second version of the rotor (Figs. 2 and 4), unlike the first (Figs. 1 and 3), is that several axial ventilation channels are arranged in each slot of the core, located around the perimeter of the groove, for example, in the bottom and in the walls of the groove, and partitions 8, designed to turn the cooling gas from the radial ducts 4 into the axial slot grooves 6, are placed closely below the lower edges of the slotted wedges 12, with no holes 9.

When the rotor rotates, the spacer elements 7, which serve as ventilation blades, drive cooling gas in the radial channels 4, and the cooling gas flows circulate not only in the radial direction, but also through the axial groove channels from the high pressure channels 10. 11 relatively low pressure. Thus, direct heat exchange takes place between the cooling gas and the most thermally stressed low winding conductor in the active core of the core. In the first variant, through the opening 9, there is a partial flow of the cooling gas circulating in the radial direction from the zone of relatively low pressure, which provides a more uniform cooling of the heat exchanger 5.

Subject invention

Claims (2)

1. An electric gas-cooled machine containing a core, provided with radial channels, separating packages, axial channels made in grooves, ra-support elements installed along the radio channels throughout the circumference of the core with an interval in the slot division, and partitions placed across the radial channels and serving to direct the cooling agent from the radial channels to the axial, characterized in that, in order to increase the cooling intensity, these (the partitions are rigidly connected to spacers and the limits of each pair of adjacent gap elements are set opposite, and the perovorodki two adjacent radial channels are offset relative to each other by 180 °. 2. The machine according to claim 1, characterized in that a hole is made in the area of each spacer element located in the groove zone.