JPS642525Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a salient pole rotor for a rotating electrical machine such as a synchronous machine.

[Conventional technology]

Hereinafter, a salient pole rotor of a rotating electrical machine such as a synchronous machine will be explained as an example.

A salient pole rotor of a conventional synchronous machine is shown in FIGS. 1 and 2 as a vertical sectional view and a partial plan sectional view. The figure shows the case of a vertical shaft type, where 1 is a rotating shaft, 2 is a rotor spider, and 3 is a rim that is firmly fixed to the rotor spider and forms a yoke for the rotor. Reference numeral 4 denotes a plurality of radial ventilation ducts provided on this rim, and ventilation intervals are formed by a plurality of duct pieces 5 and a spacing ring 6. 7 is a tightening bolt for the rim 3, and 8 is a nut. Reference numeral 10 denotes a plurality of salient pole-shaped magnetic pole cores made of laminated thin steel plates, which are tightened with tightening bolts.
is fixed to the outer periphery of the 11 is a field coil fitted in the magnetic pole core 10, 9 is a magnetic pole and the magnetic pole core 10
and a field coil 11. 12 is a fan attached to the rim 3.

Next, 13 is a fixed frame, 14 is a stator core fixedly supported by this stator frame, and a radial ventilation duct 15 is provided. 16 is a stator coil, and 17 is an end enclosure. 18 is a rotor, 1~
12, and 19 is a stator, which is made up of 13 to 17. 20 is an air gap formed between the rotor 18 and the stator 19.

In addition, in the case of so-called internal cooling in which cooling air is also sent between the magnetic pole core 10 and the field coil 11, the configuration is as shown in a partial plan sectional view and longitudinal sectional view in FIGS. 3 and 4. Ta. In the figure, 21 is a top washer made of an insulating material, and 30 is a top washer provided at a portion of the rim 3 located between adjacent field coils 11 in order to reduce ventilation resistance when cooling air flows out from the ventilation duct 4. A concave portion extending in the axial direction, 40 an inter-pole ventilation passage formed between adjacent magnetic poles 9, 50 an intra-pole ventilation passage provided between the magnetic pole iron core 10 and the field coil 11, 60 a magnetic pole 9 This is a discharge passage provided at a portion of the head which contacts the top washer 21, and communicates with the intra-magnetic pole ventilation passage 50 to allow the cooling air flowing through the intra-magnetic pole ventilation passage 50 to be discharged between the magnetic poles 9.

In the conventional device described above, when the rotor 18 rotates, the cooling air introduced by the fan 12 cools the end of the field coil 11 and passes through the end of the stator coil 16 as shown by the arrow. Further, the cooling air that has entered the inner diameter side of the rotor spider 2 passes through the ventilation duct 4 and flows into the inter-pole ventilation path 40, and flows between adjacent field coils 11 as shown by the arrow to cool them. In the case of internal cooling, the cooling air also flows through the intra-pole ventilation passage 50 between the pole iron core 10 and the field coil 11 to cool it. Cooling air passing through the intra-magnetic pole ventilation passage 40 between the field coils 11, the intra-magnetic pole ventilation passage 50 between the magnetic pole iron core 10 and the field coil 11, and the exhaust passage 60 is blown out into the air gap 20 by the fan action of the salient poles. death,
After passing through this, it passes through the ventilation duct 15 of the stator 19,
The stator coil 16 and stator core 14 are cooled.

[The problem that the idea attempts to solve]

In the conventional device as described above, the cooling air that has been flowing through the ventilation duct 4 flows through the inter-pole ventilation passage 40 and the intra-pole ventilation passage 50, but there are very few circulation passages on the intra-pole ventilation passage 50 side, and there is no flow passage between the magnetic poles. There are many ventilation passages on the 40 side, and only the cooling air passing near the field coil 11 contributes to the cooling of the field coil 11. Although the ventilation structure is designed with sufficient consideration given to the flow rate of cooling air, First, there was a drawback that the cooling efficiency of the field coil 11 was not necessarily sufficient.

This invention was made in consideration of the above-mentioned shortcomings of the conventional technology, and its object is to provide a salient-pole rotor for a rotating electric machine which can increase the cooling efficiency of the field coil by disposing a partition member extending in the axial direction between the magnetic poles, restricting the amount of cooling air flowing through the inter-pole ventilation passage, and introducing a large amount of this restricted cooling air into the internal magnetic pole ventilation passage.

[Means for solving the problem] The salient pole rotor of the rotating electrical machine in this invention is
In a salient pole rotor of a rotating electrical machine, which has a rim having a ventilation duct in the radial direction and a salient pole magnetic pole attached to the outer periphery of the rim, the rotor is provided between a magnetic pole iron core and a field coil constituting the magnetic pole. ventilation duct,
a drainage channel that communicates with the ventilation passage on the magnetic pole head side and allows cooling air flowing through the ventilation passage to flow out between the magnetic poles; and a drainage passage that communicates with the ventilation passage and faces the bottom of the field coil. A recessed portion communicating with the ventilation duct and extending in the axial direction, and a partition member disposed between the magnetic poles and extending in the axial direction to form a ventilation passage parallel to the field coil. be.

[Effect]

The partition member of the salient pole rotor of the rotary electric machine in this invention limits the amount of cooling air flowing through the inter-pole ventilation passage, and introduces the restricted cooling air into the intra-pole ventilation passage.

〔Example〕

An embodiment of this invention will be described below with reference to FIG. In the figure, 3 is the rim, 9 is the magnetic pole, 1
0 is a magnetic pole core, 11 is a field coil, 21 is a top washer, 31 is a concave portion extending in the axial direction, 50 is a ventilation passage in the magnetic pole between the magnetic pole iron core 10 and the field coil 11, 60 is a discharge passage, 22 is arranged between the magnetic poles 9, that is, between the field coils 11, and the field coils 11
This is a partition member that forms a ventilation path 40 between the two.

The following operation will be explained. When the rotor 18 rotates, the cooling air introduced by the fan 12 cools the end of the field coil 11 and further passes through the end of the stator coil 16 to cool it. Furthermore, the cooling air that has entered the inner diameter side of the rotor spider 2 passes through the ventilation duct 4, flows through the ventilation path 40 formed by the partition member 22 disposed between the adjacent field coils 11, and then flows from the outside. The field coil 11 is cooled. Furthermore, cooling air also flows through the ventilation path 50 between the magnetic pole iron core 10 and the field coil 11 to cool the field coil 11 from the inside, and flows out between the magnetic poles 9 through the exhaust path 60. The cooling air passing through the ventilation passage 70 between the field coil and the partition member 22, the ventilation passage 50 between the magnetic pole iron core 10 and the field coil 11, and the exhaust passage 60 is affected by the fan action of the salient poles and flows into the air gap 20. The air is ejected, passes through the ventilation duct 15 of the stator 19, and cools the stator coil 16 and stator core 14. In this way, since the flow rate limiting member 22 that limits the flow rate of the cooling air on the inter-pole ventilation path 70 side is disposed between the field coils 11, it is possible to move the cooling air from the ventilation duct 4 to the inter-pole ventilation path 40 as in the conventional case. In this invention, the amount of cooling air flowing through the inter-pole ventilation path 70 of this invention can be significantly restricted by the flow restricting member 22 compared to the amount of cooling air flowing through the conventional inter-pole ventilation path 40. Then, the restricted cooling air is transferred to the magnetic pole internal ventilation passage 50 and the exhaust passage 6.
0, and the amount of cooling air flowing through the magnetic pole internal ventilation passage 50 side can be significantly increased. Therefore, the cooling efficiency of the field coil 11 can be increased.

Further, as shown in FIG. 6, the partition member 22 of this invention may be provided in a structure having both recesses 30 and 31 extending in the axial direction.

[Effect of idea]

As explained above, this invention is a salient pole of a rotating electrical machine that can increase the cooling efficiency of the field coil by arranging a partition member between the magnetic poles 9 and the field coil to form a ventilation passage. shape rotor can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 are a vertical sectional view and a partial plan sectional view showing a salient pole rotor of a conventional rotating electrical machine;
4 and 4 are plan sectional views and longitudinal sectional views of a part of a salient pole rotor of another conventional rotating electrical machine, and FIG. 5 is a salient pole rotor of a rotating electrical machine according to an embodiment of the invention. FIG. 6 is a partial plan sectional view showing a salient pole rotor of a rotating electric machine according to another embodiment of the invention. In the figure, 3 is a rim, 9 is a magnetic pole, 10 is a magnetic pole core, 11 is a field coil, 50 is a ventilation passage within a magnetic pole,
60 is a discharge path, 22 is a partition member, and 70 is an inter-magnetic pole ventilation path. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a salient pole rotor of a rotating electrical machine, which has a rim having a ventilation duct in the radial direction and a salient pole magnetic pole attached to the outer periphery of the rim, the rotor is provided between a magnetic pole iron core and a field coil constituting the magnetic pole. a ventilation passage that communicates with the ventilation passage on the magnetic pole head side and allows cooling air flowing through the ventilation passage to flow out between the magnetic poles; a discharge passage that communicates with the ventilation passage and faces the bottom of the field coil. a recess that communicates with the ventilation duct and extends in the axial direction in a portion of the rim that faces the rim; and a partition member that is disposed between the magnetic poles, extends in the axial direction, and forms a ventilation passage that is parallel to the field coil. A salient pole rotor for a rotating electric machine, characterized in that it has the following features: