JP2586921Y2 - Cooling structure of salient pole type rotor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a salient pole type alternator, and more particularly to a cooling structure for a salient pole type rotor.

[0002]

2. Description of the Related Art Generally, a winding method of a field winding of a rotating field type synchronous generator employs a method in which a coil bobbin is provided on a magnetic pole core or a magnetic pole iron core is insulated and wound. However, in such a method, both the heat generation of the field winding itself due to the excitation current and the temperature rise of the magnetic pole core act, so that the entire rotor is heated to a temperature higher than the limit temperature of the field winding. In order to prevent this heating, various cooling structures have been proposed to prevent the temperature rise.

[0003] For example, Japanese Utility Model Laid-Open No. 63-81643 has been proposed. In this invention, as shown in FIGS. 6 and 7 , a guide plate 22 having both ends bent is applied to both end surfaces of a magnetic pole core 21 to wind a field winding 23, so that the side surface of the magnetic pole core 21 is A cooling air passage 24 is formed in the gap between the plate 22 and the plate 22 to prevent the field winding and the magnetic pole core from being heated. Moreover, conceived to be described in the real No. 1 over 166447 Patent Publication No. 8 and the field core 32 as shown in FIG. 9
An outer peripheral ring 37 is disposed at both ends of the field winding 33 wound around the supporter 36 so as to prevent the supporter 36 from slipping out of the supporter 36 due to the rotation of the rotor. There is also a system in which a spacer 36A is inserted into the support 36 to form a cooling air passage. Further, in Japanese Patent Application No. 4-74101 "Salient-pole rotor with winding guide insulating member" previously proposed by the applicant, the outermost end faces of the magnetic pole iron core are disposed near the shaft from the magnetic pole head of each magnetic pole. , Two winding guide insulating members having a U-shaped cross section parallel to each other are attached to each other and mounted.

[0004]

However, in the method of forming the cooling air passage using the guide plate 22 and the spacer 36A as described above, several air passages are formed between the windings to improve the cooling efficiency. Excellent to improve, but guide plate
There is a problem in the fixing method such as the need for the ring 37 for fixing the spacer 22 and the spacer 36A. For this reason, it is necessary to compensate the strength stability by bundling the winding bundle with a thread or a tape. In addition, the previously proposed winding guide insulating member includes four members each having a U-shaped cross section on one end surface of each magnetic pole.
A total of 32 pieces were required, and the cooling effect was insufficient at each magnetic pole corner.

In view of the above, the present invention is designed to form a plurality of cooling air passages with a small number of parts using a simple member and to improve the mechanical strength, thereby solving the above problem. It is an object of the present invention to provide a cooling structure for a salient pole type rotor with a line guide member.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a salient pole type rotor having a plurality of salient poles, and to provide a through-hole in the vicinity of a shaft hole of the pole iron core. Is established,
A large number of the magnetic pole cores are laminated, and coil support bars corresponding to the respective through holes of the magnetic pole core are provided on the magnetic poles at both ends of the magnetic pole.
As allowed to protrude from the side surface of the core, through fixed to each through-hole, and the guide protrusion of the coil support bars in this straddle the magnetic poles adjacent the winding guide insulating member L-shaped cross-section, both ends Press it on the side end face of the magnetic pole iron
At least one field winding receiver is disposed at a longitudinally intermediate portion of the corners of the two magnetic poles, and a field winding is wound from outside the magnetic pole core and the winding guide insulating member ,
The winding guide is provided between a side end face of a magnetic pole core and the field winding.
A gap is formed by interposing a
Air flow in the gap between the inner surface of the
Shaft, on the other hand, formed by the field winding receiver
Air outside the field winding wound around each magnetic pole by the gap in the direction
The flow can be achieved.

[0007]

The cooling structure of the salient pole type rotor according to the present invention has the above-described structure. Therefore, the magnetic pole cores are laminated, and the winding guide insulating members penetrate through the coil support bars protruding on both outer sides.
The salient-pole rotor is formed by winding the field winding with this interposed therebetween. When the salient-pole rotor rotates, the negative pressure is generated by the fan action of the winding guide insulating member and the field winding bundle. Occurs, and the cooling air passage formed between the end face of the magnetic pole core and the field winding bundle is ventilated in the radial direction, and the axial side surface of the field winding bundle in the longitudinal direction has a plurality of fields provided in the middle part. It is exposed over almost the entire length only by being supported by the magnetic winding receiver and has good heat dissipation, so that the field winding and the magnetic pole core are efficiently cooled. Also, since the winding guide insulating member penetrates and is fixed to the coil support bar, it is easy to assemble, does not require a special member, and is resistant to centrifugal force due to the rotation of the salient pole type rotor. High mechanical strength.

[0008]

FIG. 1 is a perspective view of a salient pole type rotor according to the present invention, FIG. 2 is a perspective view showing a state in which a winding guide insulating member is attached to the salient pole type rotor, and FIG. FIG. 4 is a perspective view showing a partial cross section and a ventilation passage for cooling, FIG. 4 is a plan view of a winding guide insulating member according to the present invention, and FIG.
Plan view showing a clamped state of the members of the connecting wire, 6 conventional guide plates perspective view showing, 7 a guide plate partial plan view of a salient-pole rotor equipped with 6, 8 of conventional FIG. 9 is a partial cross-sectional view of FIG. 8 showing a salient pole type rotor with a support and a ring attached thereto.

An embodiment according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, a salient pole type rotor 1 of a rotating field type synchronous generator has a rotor core 2 which is a magnetic pole core formed by stacking a large number of steel plates into blocks. The rotor core 2 has a shaft hole 3 at the center thereof.
It is integrally formed with four magnetic pole portions 5 radially protruding at equal intervals from the periphery of the shaft hole 3. Also, as shown in FIG. 2, through holes 7 provided near both side edges of the outer periphery of the head of each magnetic pole portion 5 and near the shaft hole 3 and near the corners of both magnetic pole portions.
The coil support bars 7, 8 , and 9 are fitted into and inserted into a, 8a , respectively , and are protruded from both outer surfaces of both ends of the laminated rotor core 2.

The through holes 10a, 10b and 10c of an L-shaped winding guide insulator 10, which is a winding guide member shown in FIG. 4, are fitted into the projecting portions of the coil supporting bars 7, 8, and 9. . Winding guide insulator 10 is held together in the rotor core 2 and the coil support bars 7,8 and the shaft hole 3 near the coil support bars 9 of each pole adjacent phase boundary on the outer peripheral surface
Since the magnetic winding 13 is wound , the winding guide insulator is firmly
10 is supported. At both ends of the coil support bars 7, 8 and the coil support bar 9, winding guide insulators 10 are provided.
Are through holes 10a, 1 provided at both ends of the L-shape.
0b and 10c are inserted. Winding guide insulator 1
The corner portion 10d of the coil winding portion 0 has an arc shape, and a groove is formed in the rotor core 2 so that the first layer of the rotor core 2 is aligned and wound. The sides are also made symmetrically. The L-shaped winding guide insulator 10 is integrally molded with a material excellent in insulation resistance, heat resistance and aging. The shape straddling between the two adjacent magnetic pole portions 5 is the same between any magnetic poles,
Since it is one kind of member, it is very convenient in handling.

Further, as shown in FIGS. 2 and 3, the corner portions between the magnetic pole portions 5 around the shaft hole 3 of the winding guide insulator 10 are provided with crossover clamp grooves 7b and 8b. Have been. Then, the second ventilation path 16 is provided in the longitudinal direction of the corner portion.
Has been resected. The winding guide insulator 10 is connected to each through hole 1
0a, 10b and 10c are simply referred to as coil support bars 7, 8, 9
No special mounting tools are required, and no auxiliary parts are required.

Further, as shown in FIGS. 1 and 2, the support on the axial side surface of the field winding 13 is supported by a coil receiver 12 which is a field winding receiver . The rotor core 2 is fitted to both longitudinal ends and an intermediate portion. The field winding 13 is wound around the magnetic pole portion 5 with the winding guide insulator 10 and the coil receiver 12 serving as guides, and has a structure in which the surface of the field winding 13 is exposed. Therefore, as shown in FIG.
And the inner surface of the field winding 13 via the winding guide insulator 10
A first ventilation path 15 is formed between the end face of the rotor core 2 and the salient pole type rotor 1 rotates in the direction of arrow F1 while the salient pole type rotor 1 is rotating.
The air breeze blows through. Each magnetic pole of the salient-pole rotor 1 is an opening of the winding guide insulator 10 during rotation.
Air that has entered from the second air passage 16 results in air wind blowing through the arrow F2 in the longitudinal direction and release <br/> ERROR 3 by centrifugal force from the gap between the coil receiver 12. Also,
Since the second ventilation passage 16 is also formed on the surface portion of the field winding 13 in the longitudinal direction on the shaft hole side, the winding guide insulator 10 and the winding guide insulator 10 are formed.
The heat dissipation is good due to the turbulent flow during rotation due to the fan action of the bundle of field windings 13 and the rotor core 2 and the field winding 13 are extremely effectively cooled.

Next, a description will be given of the crossover processing of each magnetic pole and the workability of the winding. FIG. 5 shows crossover clamp grooves 8b ', 7
b, 8b, the N1 · S1 pole and N2
This is an example in which a pole and an S2 pole are paired, and the beginning and end of the field winding 13 are denoted by A and B, respectively. Winding guide insulators 10 are provided at both ends of the magnetic pole portion 5 of the rotor core 2.
Are inserted into the coil support bars 7, 8, 9. Then, the coil receiver 12 is also mounted. First, the winding start A of the field winding 13 is clamped by the clamp groove 8b ', and then wound around the magnetic pole (N1) in the direction of the arrow shown in the figure. When a predetermined number of turns are wound around the magnetic pole (N1), it is fixed by the clamp groove 7b on the opposite side, and the crossover 18 guides the field winding 13 to the next magnetic pole (S1).
Can be clamped only by fitting into the clamp groove 7b. In this clamp groove 7b, no special tool is required and the coating of the winding is not damaged.

Moving to the magnetic pole (S1), the magnetic pole is wound with the winding direction reversed from that of the magnetic pole N1. Clamp groove 8b
, And fitted into the clamp groove on the opposite side to complete the winding of the magnetic pole S1. While clamping in each clamp groove in the same procedure as above, cross over the other magnetic poles N2 and S2,
It is completed at the end B of the volume. The final end of this field winding is connected to a rotary rectifier (not shown) of the rotor. The work of clamping the crossover of the field winding is performed by connecting the crossover with the clamp groove 8.
This is an extremely simple operation of simply fitting in b ', 7b, 8b. Therefore, each of the clamp grooves 8b 'to 8b
The wire can be easily and stably processed while being clamped at the same time. As is generally done in the past, when the winding of the one-pole field winding is completed, when the next magnetic pole is transferred to the next one, There is no need to cut the crossover part, nor to perform soldering work for the crossover part and thin manual work such as binding with a thread or tape.

In the above-described embodiment, a four-pole salient-pole rotor is used as the salient-pole rotor. However, the present invention is not limited to this. For example, a two-pole salient-pole rotor, a six-pole salient-pole rotor, etc. Needless to say, a salient pole type rotor having the above number of poles may be used.

[0016]

As described above, according to the cooling structure of the present invention, the through-hole of the winding guide insulating member is inserted and mounted on the coil support bar protruding from both end surfaces of the magnetic pole core, and the magnetic pole core end surface is mounted. And a first winding formed between the first winding and the inner surface of the field winding bundle .
Angle of both poles in the longitudinal direction of the air passage and field winding bundle
Since the second ventilation path is formed in the portion via the field winding receiver, the field winding and the magnetic pole core can be cooled very effectively. Further, since the L-shaped winding guide insulating members are each guided and fixed by three coil supporting bars, the assembling work is easy, and mechanical properties such as centrifugal force due to rotation of the salient pole type rotor are provided. Strength can also be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a salient pole type rotor according to the present invention.

FIG. 2 is a perspective view showing a state in which a winding guide insulating member is attached to the salient pole type rotor.

FIG. 3 is a perspective view showing a partial cross section of a field winding and a ventilation passage for cooling.

FIG. 4 is a plan view of a winding guide insulating member according to the present invention.

FIG. 5 is a plan view showing a clamped state of a crossover of the winding guide insulating member according to the present invention.

FIG. 6 is a perspective view showing a conventional guide plate.

FIG. 7 is a partial plan view of a salient pole type rotor equipped with the guide plate of FIG. 6;

FIG. 8 is a partial plan view of a salient pole type rotor with a conventional support and ring attached.

FIG. 9 is a partial sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Salient pole type rotor 2 Rotor iron core 3 Shaft hole 5 Magnetic pole part 7, 8, 9 Coil support bar 7b, 8b, clamp groove 10 Winding guide insulator 12 Coil receiver 13 Field winding 15 First ventilation path 16 Second ventilation path 18 Crossover F1 Cooling air of the first ventilation path F2 Cooling air of the second ventilation path

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-169348 (JP, A) JP-A-3-239138 (JP, A) JP-A-64-34851 (JP, U) 8610 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 3/00-3/52 H02K 19/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A through-hole is provided at both ends of a head of a magnetic pole core constituting a salient-pole rotor having a plurality of salient poles and near a shaft hole of the magnetic pole core. the coil support bars that correspond to the respective through holes of the magnetic pole cores stacked both
As allowed to protrude from the side end face of the pole core end side, through fixed to each through-hole, and the guide protrusion of the coil support bars in this the magnetic poles adjacent the winding guide insulating member L-shaped cross-section Straddles and presses against the side end faces of the magnetic pole cores at both ends
At least one field winding receiver is disposed at the longitudinally intermediate portion of the corners of the two magnetic poles, and the field winding is wound from outside the magnetic pole core and the winding guide insulating member. Turn now to the windings between the field winding and the side end face of the magnetic pole cores
A gap is formed by interposing a guide insulating member,
Air flow through the gap between the inner surface of the winding and the side end surface of the pole iron
On the other hand, formed by the field winding receiver
Outside the field winding wound around each magnetic pole by the axial gap
A cooling structure for a salient-pole rotor characterized by generating an air flow .