JPH11341731A - Salient pole type rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a salient pole type rotor which can always apply an appropriate pressure to a rotor winding and can be easily assembled and disassembled. As a first means, a magnetic pole having a rotor winding (2) wound around a plurality of salient pole type magnetic cores (1) is arranged in a circumferential direction of a yoke (3). Set up. The rotor winding (2) has an upper insulating plate (4), a lower insulating plate (5), and an interlayer insulating (12). In a salient pole type rotor (16) having a rotor winding (2) wound around the magnetic pole core (1), the salient pole type rotor (16) engages over a lower insulating plate (5) of an adjacent rotor winding. Leaf spring with stupid hole (6a) in the center
(6), a bolt (7) inserted into the stupid hole (6a), a nut (8) abutting on the lower surface of the leaf spring (6) and engaging with the bolt (7); (3) is provided with a screw hole (7a) into which the tip of the bolt (7) is screwed. The second means is the first
The difference from the above method is that the fool hole (6a) of the leaf spring (6) is changed to a screw hole (6b), and it is engaged with the bolt (7) to eliminate the nut (8). The hole (7a) is made a stupid hole (7b), and the tip of the bolt (7) is inserted and supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a salient-pole type rotating electric machine, and more particularly to a salient-pole type rotor which applies a necessary preload to a rotor winding and compensates for withering of an insulator.

[0002]

2. Description of the Related Art In general, in a salient-pole type rotor, if the operation is performed for a long period of time, the insulator between the layers of the rotor winding and the insulating plates above and below the rotor winding are so-called dead due to aging (aging of the insulator). (Shrinkage), and the rotor winding shrinks, resulting in a mechanically and electrically unfavorable state. Therefore, in order to prevent this, the rotor winding is pressed with a predetermined force in anticipation of the contraction amount of the insulator.

FIGS. 4 to 6 show various conventional examples for preventing the withering.

In FIG. 4, a rotor winding (2) is mounted on a magnetic pole core (1), and the magnetic pole core (1) is further engaged with an engaging groove such as a dovetail groove or a convex groove of a yoke (3). It is attached to (13). At this time, high-quality insulating paper is used to insulate the rotor winding (2), and when manufacturing the rotor winding, it is formed by pressing with more force than the rotor winding (2) is applied during operation. From, was attached to the magnetic pole core.

In the example shown in FIG. 5, a groove is formed on the outer peripheral surface of the yoke (3) over the entire axial direction at a position facing the lower insulating plate (5).
(9), a plurality of blocks (not shown) divided into a plurality in the axial direction are buried in the grooves (9), a recess is formed at the boundary of each block, and a helical spring (10 ) Was stored, and the helical spring (10) pushed up the rotor winding (2).

In the example of FIG. 6, the lower insulating plate of the rotor winding (2) is used.
An iron flange (11) that is arranged on the yoke (3) side of (5) around the base of the magnetic pole core (1) and fixed to the magnetic pole core (1) by welding
And housed in the groove (9) of this iron flange (11)
(5) A helical spring (10) is provided to press the rotor, and the helical spring (10) pushes up the rotor winding (2).

[0007]

In the above conventional structure,
In the example shown in FIG. 4, when the rotor winding is manufactured, the rotor winding (2) is pressed and formed with a force greater than the force applied to the rotor winding (2) during operation, so that the forming is troublesome.

In the example shown in FIG. 5, the helical spring (10) is attached when the magnetic pole is attached to the yoke (3), so that the lower insulating plate (5) of the rotor winding (2) and the yoke are attached. The helical spring (10) must be fitted in the narrow space between (3) and
It took time to install the helical spring (10), which also increased the rotor assembly cost. Further, when disassembling, the helical spring (10) must be removed and the magnetic poles must be removed, which takes time.

In the example shown in FIG. 6, it is time-consuming to weld an iron flange (11) for fixing the helical spring (10) with the helical spring (10) inserted. Flange (1
At the time of welding of 1), the iron flange with the helical spring (10) inserted
Special equipment to hold down (11) was required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a salient pole which can always apply an appropriate pressure to a rotor winding and can be easily assembled and disassembled. It is to provide a shape rotor.

[0011]

In order to solve the above problems, the present invention is as follows.

According to the first aspect of the present invention, a leaf spring which engages over the lower insulating plate of the adjacent rotor windings and has a stupid hole in the center, a bolt inserted into the stupid hole, and a lower surface of the leaf spring. A nut that contacts and engages with the bolt, and a screw hole into which the tip of the bolt is screwed is provided in the yoke.

According to a second aspect of the present invention, in the salient pole type rotor provided with the rotor winding wound around the magnetic pole core, the salient pole type rotor engages over the lower insulating plate of the adjacent rotor winding and has a screw hole in the center. And a bolt engaging the screw hole and a stupid hole for inserting and supporting the tip of the bolt in the yoke.

[0014]

(Embodiment 1) Hereinafter, an embodiment of the first invention (corresponding to claim 1) will be described with reference to FIG. 1 and FIG. FIG. 1 is a schematic cross-sectional view of a rotating electric machine having a salient-pole rotor of the present invention viewed from an axial direction. FIG. 2 is a detailed cross-sectional view of a main part of the salient-pole rotor of FIG. In these figures, a salient pole type rotor (16) is disposed inside a stator (15). Although FIG. 1 shows four poles for simplicity,
FIG. 2 shows a case where the number of magnetic poles is large.

As shown in FIGS. 1 and 2, a magnetic pole having a rotor winding (2) wound around a plurality of salient pole type magnetic cores (1) is connected to a circumferential direction of a yoke (3). To be installed in Rotor winding (2)
Has an upper insulating plate (4), a lower insulating plate (5), and an interlayer insulating (12). In a salient pole type rotor (16) having a rotor winding (2) wound around the magnetic pole core (1), the salient pole type rotor (16) engages over a lower insulating plate (5) of an adjacent rotor winding. A leaf spring (6) having a stupid hole (6a) in the center, and a bolt (7) inserted into the stupid hole (6a)
, A nut (8) that abuts against the lower surface of the leaf spring (6) and engages with the bolt (7), and the bolt (7) is attached to the yoke (3).
And a screw hole (7a) into which the tip of the screw is screwed.

Next, an assembling method will be described. Yoke (3)
A bolt (7) provided with a leaf spring (6) is inserted deeper than a predetermined position, and the magnetic pole is attached to the yoke (3).
(7) Loosen and move the lower insulating plate (5) to a predetermined position to press.

With the first embodiment, the leaf spring (6) can apply a preload corresponding to the withering amount of the upper insulating plate (4), the lower insulating plate (5), and the interlayer insulating (12) in advance. As a result, an appropriate pressure can always be applied to the rotor winding (2), and a salient pole type rotor that can be easily assembled and disassembled can be provided.

(Embodiment 2) Next, an embodiment of the second invention (corresponding to claim 2) will be described with reference to FIGS. FIG. 1 is as described in the first embodiment, and FIG. 3 is a detailed sectional view of a main part of the salient-pole rotor of FIG.

The difference between FIG. 3 and FIG. 2 is that the stud hole (6a) of the leaf spring (6) is changed to a screw hole (6b) so that the nut (8) to be engaged with the bolt (7) is eliminated and the yoke is changed. (3) Screw holes (7a) into stupid holes (7
b) and the tip of the bolt (7) was inserted and supported.

Next, an assembling method will be described. Yoke (3)
With the head under the boring hole (7b) for bolt insertion
By inserting a bolt (7) with (6) and tightening the bolt (7), the leaf spring (6) rises and the lower insulating plate (5)
To push up the rotor winding (2).

According to the second embodiment, the same operation as in the first embodiment can be obtained, so that an appropriate pressure can always be applied to the rotor winding (2), and the rotor winding (2) can be easily assembled and disassembled. And a salient pole type rotor capable of being provided.

[0022]

As described above, according to the present invention,
A leaf spring can always apply an appropriate pressure to the rotor winding (2) in accordance with the withering amount of the upper insulating plate, lower insulating plate and interlayer insulation, and can be easily assembled and disassembled. A salient rotor can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a rotating electric machine having a salient pole type rotor according to the present invention as viewed from an axial direction.

FIG. 2 is a detailed cross-sectional view of a main part of the salient-pole rotor viewed from the axial direction, showing the first embodiment of the present invention;

FIG. 3 is a detailed sectional view of a main part of the salient pole type rotor viewed from the axial direction, showing the second embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing a first conventional salient-pole rotor.

FIG. 5 is an essential part cross-sectional view showing a second conventional salient pole type rotor.

FIG. 6 is a sectional view of a main part showing a third conventional salient pole type rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Magnetic pole core 2 ... Rotor winding 3 ... Yoke 4 ... Upper insulating plate 5 ... Lower insulating plate 6 ... Leaf spring 6a ... Fool hole 6b ... Screw hole 7 ... Bolt 7a ... Screw hole 7b ... Fool hole 8 ... Nut 9 ... groove 10 ... helical spring 11 ... iron flange 12 ... interlayer insulation 13 ... engagement groove 15 ... stator 16 ... salient pole type rotor

Claims (2)

[Claims] In a salient pole type rotor having a plurality of salient pole type magnetic cores arranged in a circumferential direction of a yoke and having a rotor winding wound on the magnetic pole irons, adjacent rotors are provided. A leaf spring engaging over the lower insulating plate of the child winding and having a stupid hole in the center, a bolt inserted into the stupid hole, a nut abutting on the lower surface of the leaf spring and engaging with the bolt, A salient pole type rotor having a yoke and a screw hole into which a tip of the bolt is screwed. 2. A salient pole type rotor having a plurality of salient pole type magnetic cores arranged in a circumferential direction of a yoke and having a rotor winding wound on the magnetic pole irons. A leaf spring engaging over the lower insulating plate of the slave winding and having a screw hole in the center, a bolt engaging with the screw hole, and a stupid hole for inserting and supporting the tip of the bolt in the yoke. Salient pole rotor.