SU1410195A1 - Electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to improve the cooling and expansion of the field of application. The electrical machine contains bearing shields with windows 4, a rotor with channels 7 and a winding holder 9, in the hub 11 of which windows 12 are located. Due to the fact that radial vanes are located on either side of each window in the hub, one row is bent to the rotor the other p d - to bearing shields, ensures that the goal is achieved. 6 Il. WITH

Description

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The invention relates to electrical engineering, in particular to electrical machines with a long ventilation system.

The aim of the invention is to improve the cooling and the expansion of the field of use,

FIG. 1 shows an electric machine with a phase rotor, a longitudinal section; in fig. 2 the same, with a short-circuited rotor, a longitudinal section in FIG. 3 shows the wrapper holder in longitudinal section in FIG. 4 shows section A-A in FIG. 3; FIG. 5 is a view B in FIG. 3j in FIG. 6 is a sectional view BB in FIG. five.

The stator core 1 is housed in the housing 2, to which the bearing shields 3 with the windows 4 are axially mounted.

The rotor core 5 is placed on the shaft 6, and axial channels 7 are located in the core 5 of the rotor. Core 5 contains winding 8, Frontal winding parts 8 are matched with winding holders 9. Winding holders 9 with heat removal part 10 adjoin winding parts 8 of winding 8 and contain hubs 11, between which windows 12 are made. On hubs 11 on both sides of windows 12 there are ventilating blades 13 and 14. Blades 13 are facing from hub 11 to the core 5 of the rotor, and blades 14 to bearing bearing 3. Winding holders 9 are fixed on the shaft 6 so that the windows 12 are Lined against axial channels 7.

The machine works as follows

When the machine is in operation, air (indicated by arrows) coming through the windows in the bearing, comes under the ventilation blades placed on the hubs of the windings. Since the external blades are inclined, they capture: they thaw the air and force it to the rotor core. The inner blades, bent to the opposite side, discharge air in the space between the core of the winding holder and are simultaneously guides for the air entering the axial channel. On the opposite side of the axial channel of the rotor, the air heated from the core seizes the inner blades of the winding holder and directs it to the openings between the hubs. Further, the external winding paddles throw air to the windows of the bearing shield. At this time, the winding holder removes part of the heat from the frontal parts of the rotor winding and, due to the high thermal conductivity of the material, removes heat through the body to the cooled part — the hubs and blades.

Thus, ceteris paribus, the purged air is used more efficiently, since the cooling effect of the mass depends on the speed of air passing through the axial channels. The removal of heat from the frontal parts of the rotor winding has a directional effect, since the cooler part of the machine is in the area of the blown air. The stator winding in this case is less susceptible to heat from the rotor, and thus the heat balance of the machine is in conditions favorable to the machine. Presented in FIG. 3 One of the possible variants of construction. The coil is made by stamping and drawing on a press from a sheet material. FIG. Figure 4 shows one of the options for placing the blades on the winding holder studio, and FIG. 5 - placement of windows on a winding holder with technological operations for obtaining windows and ventilation blades.

Claims (1)

Invention Formula An electric machine with axial air cooling, comprising a housing with a stator, bearing shields with windows for air inlet and outlet, a rotor. with a winding and axial channels, a rotor winding holder with windows in the hub located opposite the rotor axial channels, characterized in that radial blades bent in opposite directions are located on both sides of each window to improve cooling and expansion of the field of application , with one row of blades bent to the rotor, and the other to the bearing shields. one lz GPTtt..tttTT  m ///////////////// rig.2 Fig.Z A-A Figm Vidb X 5 Thebes