SU1381655A1 - Hydraulic-turbine generator rotor - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase 1 reliability. The rotor of the generator consists of a rim 1 with poles 2 and a winding, forming a radial channel. The upper turns of the windings 7 are insulated with washers 5 and 6. In the BepxHirx zone of turns there are transverse channels 8 connected to the radial channel 9. Thanks to the transverse channels located in the insulating washer, this goal is achieved. 2 hp f-ly, 5 ill.

Description

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The invention relates to electrical engineering, in particular to out-of-pole rotors of large vertical electric machines.

The aim of the invention is to increase reliability.

FIG. 1 shows a rotor, a partial cross section {in FIG. 2-4 are examples of channels in an insulating washer, axonometric projection; in fig. 5 is a section A-A in FIG. four.

The rotor consists of a rim 1, on the outer diameter of which a pole 2 is fixed, consisting of a core 3 and excitation winding 4. The excitation winding 4 is insulated from the core 3 by means of the upper insulating washer 5, and from the rim, the lower insulating washer 6.

In coils 7 of the winding 4 transverse channels 8 are provided.

Radial channels 9 are provided for supplying cooling air to the channels 8 between the exciting winding 4 and the core 3 of the poles, into which the cooling air flows from the side of the rim 1 through its ventilation channels.

To prevent accumulation of dust and dirt in the upper part 10 of channel 9 and eliminate inter-turn closures, the upper insulating washer 5 is equipped with a system of open suction channels 11 on the upper plane 12 of the washer, since the execution of the channels on this plane contributes to additional cooling of the surface 12 of the pole tip 13.

The shape of the channels 11 can be made rectangular 14, trapezoidal 15, as well as with rounding elements 16 and 17 on the inner side of the channel, facing the gap between the core 3 and the winding 4 for better cooling of the outside air and ejection of foreign particles.

The cooling air enters from the side of the rim 1 to the vertical channels 9, and then to the channels 8 of the turn 7 of the winding 4, and the machine is cooled intensively. Since in the upper part 10 of channel 9 there are accumulative cards

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mana zones, in which foreign particles (dust, dirt, etc.) are gradually being deposited in the circulating cooling air and which can lead to the formation of bridges, short circuits to the ground and inter-turn closures, Dirt from part 10 by flowing air and for additional cooling of surfaces 12 of a pole tip 13 on the upper plane 12 of the washer 5 a system of open suction channels 11 is made. The same system of channels 11 can also be performed on the plane of the washer adjacent to the upper turn.

The technical and economic efficiency of the invention is to increase the reliability of the rotor by eliminating the formation of dirt bridges leading to ground and inter-turn closures and to increasing the cooling intensity of the pole piece.

Claims (3)

1. A rotor of a hydrogenerator containing a rim, poles fixed on it with pole tips and a winding, the turns of which are arranged with a gap relative to the core of the pole with the formation of a radial channel connected to transverse channels in the zone of the upper turns of the winding, insulated from the tips, insulating washers, different in order to increase reliability, said transverse channels are located in an insulating washer. 2. A rotor according to Claim 1, which is different from the fact that the said transverse channels are made with a bias towards the gap between the cores and the winding. 3. Rotor on PP. 1 and 2, o t and the fact that the said transverse channels have a trapezoidal shape in the longitudinal section with a rounding of the edges facing the gap between the core and the winding. / b 2 Fig.Z B Fi8 A a i f /