SU675539A1 - Electric machine rotor - Google Patents

Description

(54) ELECTRIC MACHINE ROTOR

The aim of the invention is to improve technical logic and simplify the design.

This is achieved by the fact that the well-known rotor is equipped with a material made of a high 1st PSTPG) 3 (Nd-CTT); For example, from ALYuYaI, and located by a shaft and a picket of the Shnitoprovod VVZ / Loki, on the periphery of which {the mentioned axial channels with heat pipes placed in them.

Fig. 1 shows a rotor of an electric machine of a high-MO of a DC motor, longitudinal section; in fig. 2 - t-ozke, section A-A in FIG. 1 and ya fng. 3 shows a section BB in FIG. one.

On the shaft 1 of the engine, the sleeve 2 is reinforced from a material with a high heat blower, for example aluminum. The periphery of the heat pipe is placed on the periphery of the heat pipe 3. The ends of the heat pipe located outside the magnetic core are exhausted with fins 4 and are cooled with external air using an independent drive fan 5. Heat pipes placed; in the axial channels of the sleeve, can be besfitilnymi.

When the rotor of an electric machine grows with a sufficient frequency, the liquid coolant placed in Tpy6jf is pressed by centrifugal forces to the peripheral sides of the heat pipes. Thermal note from the rotor package through a sleeve made of a material with high thermal conductivity Enters the peripheral sides of heat pipes and evaporates the evaporation of the coolant here. The steam is transported to the condenser sections of the fins of the heat pipes, and it condenses here, giving off heat to the walls, which are provided with lower ribs. From the outer surfaces of the ribs, the heat generated by the air flow generated by the fan with independent drive is dispersed into the surrounding space.

At very low frequencies of rotation p in the thermodynamic state, the heat-transfer fluid is concentrated in the lower parts of the heat pipes. The path of heat to the place of evaporation of the coolant in the upper part of the rotor is somewhat enhanced. However, calculations show that the non-uniformity of cooling of the rotor, caused by the point location of the heat removal areas and different distances from the package to this section of the mercury with high heat conductivity does not exceed the color.

When the rotary axis is located vertically, very small adhesives are rotating, the Spiral springs of the capacitor spruce down the inner walls down to the evaporator, and they work like stationary two-phase thermophones. At high speeds in a vertical axis machine, the coolant

located in the peripheral parts of the pipe, as in the horizontal axis of rotation.

If there are several wicks in the pipes

Heat dissipation in the evaporation section at low rotational speeds, since capillary forces distribute the heat-transfer fluid around the entire circumference of the evaporation section. However, the presence of wick in the condenser section impairs the heat transfer during condensation by increasing the thickness of the condensate layer at the inner walls. As calculations and experiments show, with moderate heat loads, which take place in

electric machines, the total heat transfer of heat pipes is not limited by the intensity of heat transfer in the pipe, but by the intensity of heat removal from the outer surface of the radiator. Therefore, the use of machines in the proposed

The design of wick heat pipes does not guarantee any kind of permissiveness in relation to the intensity of cooling as compared to besfittilny pipes.

Heat pipes are placed in a sleeve made of high thermal conductive material during; casting bushings. This provides the best thermal contact between the pipes and the sleeve. For electric pipes with heat pipes in the rotor grooves, the need for an electric pipe from the winding does not allow the valve to provide the same thermal contact as pipes that are poured into the sleeve. The same O1 applies to the pipes placed iM in the axial channels in the rotor package,

When pipes are arranged in a sleeve made of a material with a high thermal conductivity, the non-uniformity of heat removal is evened out by the sleeve material, so the pipes in the sleeve can be made bifitless, which greatly simplifies their

manufacturing.

The diameter of the tubes in the sleeve can be done in 3-5 pia3 larger than the diameter of the tubes placed in the grooves of the rotor and in the axial channels of the package. This greatly simplifies the technology of their manufacture and installation in the rotor.

Compared to a shaft - a heat pipe, separate heat pipes placed in a sleeve are easier to flush, anneal in vacuum, and hermetic, since their weight is ten times less than the weight of the shaft - a heat pipe. In engines with deep regulation of the shaft rotation frequency - the heat pipe must be made with a wick on the inner walls,

3 pipes in the sleeve can be made without a wick. The consumption of compatible (and obygno, scarce) materials on pipes in a sleeve is ten times less than on a shaft - a heat pipe. Shkonets, heat transfer surface of individual heat