JP2011125193A - Rotor for vertical shaft dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a compressive force generated due to shrink-fit by imparting flexibility to a tabular vertical rib arranged in the radial direction of a rotor spoke. <P>SOLUTION: A rotor for a vertical shaft dynamo-electric machine is constituted of the rotor spoke 2 formed of a plurality of tabular ribs 2<SB>-5</SB>and 2<SB>-6</SB>, fixed to a rotating shaft arranged at an upright position and extended in the radial direction and disc-like reinforcing materials 2<SB>-3</SB>, 2<SB>-4</SB>, or the like, connecting the side faces of the tabular vertical ribs; an annular rotor rim 3 shrink-fit on the outer periphery of the rotor spoke 2; and a plurality of rotor magnetic poles 4 mounted on the outer periphery of the rotor rim 3. In the rotor for the vertical shaft dynamo-electric machine, the tabular rib configuring the rotor spoke 2 is divided into plural in the redial direction, and parts among the divided vertical ribs 2<SB>-5</SB>and 2<SB>-6</SB>are jointed by members 2<SB>-7</SB>having an elastic coefficient that are smaller than that of the vertical rib. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotor of a vertical shaft type rotary electric machine, and more particularly to a rotor of a vertical shaft type rotary electric machine in which a rotor spoke fixed to a rotary shaft and a rotor rim are coupled by shrink fitting.

  In general, as shown in FIG. 11, a rotor of a vertical shaft type rotating electrical machine such as a water turbine generator includes a rotary shaft 1 arranged in an upright position and a rotor spoke fixed to the rotary shaft 1 and extending in the radial direction. 2, an annularly configured rotor rim 3 attached to the outer periphery of the rotor spoke 2, and a plurality of salient pole-shaped rotor magnetic poles 4 attached to the outer periphery of the rotor rim 3. It is configured.

Here, the rotor spoke 2 includes a plurality of plate-like standing bones 2-1 that are fixed at equal intervals in the circumferential direction of the rotating shaft 1 and fixed in the radial direction by welding or the like, and the plurality of standing ribs _2-1. respectively mounted on the outer diameter side end face of a bone 2 _-1, rod-like member dug keyway and 2 ₂ (hereinafter, referred to as key bar), the outer diameter side end face from the upper surface and the lower surface of the rotary shaft 1 of Tatsukotsu 2 _-1 and a disc 2 _-3 and disc 2 _-4 as a fixed reinforcement by welding on the portion over.

  The functions of the rotor spoke 2 are vertical support for the weight of the rotor rim 3 and the rotor magnetic pole 4, radial support and rotation for centrifugal force during operation, magnetic attraction force from a stator (not shown), and the like. The torque is transmitted from the water wheel shaft directly connected to the lower portion of the shaft 1 to the rotor rim 3.

Since the rotor rim 3 swells outward due to the centrifugal force as the rotational speed increases, a gap proportional to the square of the rotational speed is generated at the joint between the rotor spoke 2 and the rotor rim 3.
Since the gap formed in the coupling portion may induce vibration or the like during operation, the outer diameter of the rotor spoke 2 is previously rotated at a constant rotation from the inner diameter of the rotor rim 3 in order to prevent the generation of this gap. There is a method in which the rotor rim 3 is increased by an amount corresponding to the enlarged portion of the inner diameter of the rotor rim 3 in the number, and the rotor rim 3 is assembled by shrink fitting to the rotor spoke 2. In this assembling method, a large compressive force is generated in the radial direction on the connecting portion between the rotor spoke 2 and the rotor rim 3 when the rotor is stationary. The rotor of the prior art is manufactured so that the rotor spoke has a strength capable of withstanding the compressive force generated in the radial direction (see, for example, Patent Document 1).

JP-A-2005-253162

  In the case of the above-described method for increasing the strength of the rotor spoke, the compressive force generated on the rotor spoke side by shrink fitting depends on the rigidity ratio between the rotor spoke and the rotor rim. Increased rigidity. As a result, the compressive force generated in the radial direction between the rotor spokes and the rotor rim is further increased, and there is a drawback that the design and production of the rotor spokes and the rotor rim are difficult.

  In view of the above-described drawbacks, the present invention provides a rotating electrical machine capable of reducing the compressive force generated by shrink-fitting by providing flexibility to the plate-like standing portion arranged in the radial direction of the rotor spoke. The object is to provide a rotor.

  In order to achieve the above-mentioned object, the invention according to claim 1 is directed to a plurality of plate-like standing bones that are fixed to a rotating shaft arranged at a standing position and extend in the radial direction. Rotor spokes formed by a disk-shaped reinforcement connecting the side surfaces and a key bar attached to the outer diameter side end surface of the standing bone, and an annular rotation shrink-fitted on the key bar provided on the outer periphery of the rotor spoke In a rotor of a vertical shaft type rotating electrical machine composed of a rotor rim and a plurality of salient pole-shaped rotor magnetic poles attached to the outer periphery of the rotor rim by a dovetail, a plate-like shape constituting the rotor spoke The standing bones are divided into a plurality of radial directions, and the divided standing bones are joined by a member having a smaller elastic coefficient than the standing bones.

  According to the present invention, since the rigidity in the radial direction can be reduced without impairing the function of the rotor spoke, the vertical shaft rotation can reduce the compressive force generated between the rotor spoke and the rotor rim by shrink fitting. An electric rotor can be provided.

1 is a side cross-sectional view of a rotor of a vertical shaft type rotating electrical machine according to Embodiment 1 of the present invention. The arrow top view of the rotor of the vertical axis | shaft rotary electric machine of FIG. The principal part top view of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 2 of this invention. The principal part top view of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 3 of this invention. The principal part top view of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 4 of this invention. It is a principal part top view of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 5 of this invention, (a) is the example which applied the absorption member of the curved shape to one side, (b) is S-shaped. The figure which shows the example which applied the absorption member of the curved shape, respectively. The principal part side part sectional drawing of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 6 of this invention. The principal part side part sectional drawing of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 7 of this invention. The principal part side part sectional drawing of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 8 of this invention. The principal part side part sectional drawing of the rotor of the vertical shaft type rotary electric machine which concerns on Embodiment 9 of this invention. Side surface sectional drawing of the rotor of the vertical shaft type rotary electric machine of a prior art.

  Embodiments of a rotor of a vertical shaft type rotating electrical machine according to the present invention will be described below with reference to the drawings. Throughout the drawings, the same or corresponding parts are denoted by the same reference numerals or related reference numerals, and redundant descriptions are omitted as appropriate.

[Embodiment 1]
FIG. 1 is a side cross-sectional view of a rotor of a vertical shaft type rotating electrical machine according to the first embodiment, and FIG. 2 is a plan view of FIG. 1 viewed from an arrow direction.

  1 and 2, the rotor of the vertical shaft type rotating electrical machine according to the first embodiment is configured so that the rotary shaft 1 disposed at the standing position and the rotary shaft 1 are fixed to the rotary shaft 1 and extend radially or radially. The formed rotor spoke 2, the rotor rim 3 having an annular shape attached to the outer periphery of the rotor spoke 2 by shrink fitting, and the salient pole shape further attached to the outer periphery of the rotor rim 3 11 is the same as FIG. 11 of the conventional example in that it is composed of a plurality of rotor magnetic poles 4 and the rotor spoke 2 is composed of erections, key bars and reinforcing disks. The first embodiment is different from the conventional example in the rotor spoke 2.

That is, the rotor spokes 2 of the present embodiment 1, the Tatsukotsu 2 _-1 at an intermediate position in the radial direction a plurality of (two in the figure) the first divided into Tatsukotsu 2 _-5 and second and Tatsukotsu 2 _-6, and configured to be coupled by welding Tatsukotsu _2-6 of the first Tatsukotsu 2 _-5 and the second through the plate-shaped elastic member 2 _-7 is an intermediate joining member point is not less different greatly, are further circle for reinforcement differs from plate 2 _-3 and disc 2 _-4 welded to the upper and lower surfaces of only the outer diameter near the second Tatsukotsu _2-6 Is a point. Since other configurations are almost the same as those of the conventional example, description thereof is omitted.

The degree Incidentally, the first Tatsukotsu 2 _-5 and second Tatsukotsu _2-6 is made with a standard carbon steel, the elastic member 2 _-7 contrast does not impair the function of the rotor spokes 2 And is made of a material having a smaller elastic modulus than that of carbon steel, for example, an aluminum material. As a result, the first Tatsukotsu 2 _-5, and the second Tatsukotsu _2-6 and elastic members 2 _-7, the dissimilar metal welding.

Next, the operation of the first embodiment will be described.
Compressive force acting on Rimuki 5 moiety is a binding portion by the shrink fitting the rotor spokes 2 and the rotor rim 3 is transmitted to the elastic member 2 _-7 via the second Tatsukotsu _2-6 . Elastic members _2-7 as described above, since the elastic coefficient than the first Tatsukotsu 2 _-5 and second Tatsukotsu _2-6 is small, by elastic members 2 _-7 contracts, the first standing bone 2 _-5, second Tatsukotsu _2-6, the rigidity in the radial direction of the elastic member 2 _-7 rotor spokes 2 consisting decreases, it is possible to reduce the compressive force.

  As described above, according to the first embodiment, since the radial rigidity can be reduced without impairing the function of the rotor spoke 2, it is generated between the rotor spoke 2 and the rotor rim 3 by shrink fitting. A rotor of a vertical shaft type rotating electrical machine capable of reducing the compression force can be provided.

[Embodiment 2]
FIG. 3 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the second embodiment.
In the first embodiment shown in FIGS. 1 and 2 described above, the elastic member _2-7 is employed as the intermediate joining member, the elastic member _2-7 and the first Tatsukotsu 2 _-5 dissimilar _metals, a second Tatsukotsu 2 Although the _-6 bound by welding, the present embodiment 2, as shown in Figure 3, the first Tatsukotsu 2 _-5 and the prepared two sheets of plate-shaped elastic member 2 _-7 instead welding sandwiching an end portion of the second Tatsukotsu _2-6, the sandwiched portion of the bolt 6 _-1, is obtained so as to integrally bond at _6-2.

Thus after the first Tatsukotsu 2 _-5 and second Tatsukotsu _2-6 and material can be easily combined with different elastic members 2 _-7, it is possible to achieve the same effect as Embodiment 1 it can.

[Embodiment 3]
FIG. 4 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the third embodiment.
Embodiment 3, as shown in Figure 4, with intervening cylindrical member 7 made of carbon steel as an intermediate bonding member between the first Tatsukotsu 2 _-5 and second Tatsukotsu _2-6, between the first Tatsukotsu 2 _-5 and the cylindrical member 7, in which the cylindrical member 7 and between second Tatsukotsu 2 _-6 bonded by welding. The material of the cylindrical member 7 in this case, the first Tatsukotsu 2 _-5, may not be the same material as the second Tatsukotsu _2-6.

According to the third embodiment, the compression force by shrink fitting, by the cylindrical member 11 is deformed into an oval, the first Tatsukotsu 2 _-5, second Tatsukotsu _2-6, from the cylindrical member 7 Thus, the rigidity of the rotor spoke 2 in the radial direction is reduced, and the compression force can be reduced.

[Embodiment 4]
FIG. 5 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the fourth embodiment.
The fourth embodiment is an embodiment in which a part of the third embodiment is changed, and two cylindrical members _7-1 and _{7-2 that} are equivalent to the cylindrical member 7 that is the intermediate joint member shown in FIG. Is provided.

In the fourth embodiment, since the deformation amount of each of the cylindrical members _7-1 and _7-2 is smaller than that in the third embodiment described above, the adjustment range of the rigidity in the radial direction can be increased.

The sizes of the cylindrical members _7-1 and _7-2 may not be the same, and the number of cylindrical members may be three or more. Furthermore, it may be configured to position the third Tatsukotsu between the cylindrical member 7 _-1 and 7 _-2.

[Embodiment 5]
FIG. 6 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the fifth embodiment. FIG. 6A shows an example in which the absorbing member 8 having a curved shape is applied only to one side surface, and FIG. It is a figure which shows the example which applied the absorption member 9 of the shape curved in S shape, respectively.

The fifth embodiment, as shown in Figure 6 (a), (b) , as an intermediate bonding member between the first Tatsukotsu 2 _-5 and second Tatsukotsu 2 _-6, manufactured in carbon steel It is one of the absorbing member curved only on the side surface side 8 or by interposing an absorbing member 9 having a shape curved in an S-shape, the first Tatsukotsu 2 _-5 and absorbing member 8 (or 9) between, absorbing member 8 (or 9) and between the second Tatsukotsu _2-6 joined by welding, and to be able to absorb the radial movement of the rotor spokes 2 in absorber 8 or the absorbing member 9 Is.

During the operation of the rotor, when the rotor rim is expanded by centrifugal force, the absorbent member 8 having a shape curved only on one side surface (FIG. 6A) or the absorbent member 9 having a curved shape in an S shape. by (FIG. 6 (b)) is deformed, the first Tatsukotsu 2 _-5, second Tatsukotsu 2 _-6, absorbing member 8 (or absorbing member 9) consisting of radial direction of the rotor spokes 2 The rigidity is reduced, and the compression force can be reduced.

Incidentally, FIG. 6 (a), (b) the first Tatsukotsu 2 _-5, the three parties of the second Tatsukotsu _2-6 and absorbing member 8 (or 9) as a separate body, welded between each in was to bind, the fifth embodiment is not limited thereto, the first Tatsukotsu 2 _-5, second Tatsukotsu _2-6 and absorbing member 8 (or 9) from the beginning You may make it form with an integral material. Thus, when forming with an integral material, a number of parts can be reduced.

[Embodiment 6]
FIG. 7 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the sixth embodiment.
Embodiment 6 includes a rotary shaft 1 and the upper end 7 _-61 inner diameter side end portion of the second Tatsukotsu _2-6 and the lower end 7 _-62 were respectively protruded to the upper and lower as shown in FIG. 7 A gap G is provided between the upper end portion 7 _-61 , the lower end portion 7 _-62 and the rotating shaft 1.

For construction of the present embodiment 6, the cross-sectional area of the second Tatsukotsu _2-6 is reduced, since the section modulus is not significantly change, the ability to support the weight of the rotor rim 3 and the rotor poles, etc. 4 It is possible to reduce the radial rigidity without loss.

[Embodiment 7]
FIG. 8 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the seventh embodiment.
Embodiment 7, a second Tatsukotsu 2 _-6 inner diameter side end portion serving as a connecting portion between the rotary shaft 1 as shown in Figure 8, the intermediate portion 2 _-63 of the outer diameter side end portion upper and inflating the bottom, and is obtained by so providing the long hole H in the rotation axis direction having a height equal to the length of the Tatsukotsu _2-6 therein.

In the case of the seventh embodiment, the upper end portion 7 _-61 and the lower end portion 7 _{-62 that} are the coupling portions with the rotary shaft 1 do not protrude in the axial direction of the rotary shaft 1 as in the sixth embodiment described above. The axial length of the central body 1 can be made shorter than in the case of.

[Embodiment 8]
FIG. 9 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the eighth embodiment.
In the case of Embodiments 1 to 7 described above, the rotor spoke 2 on the outer peripheral side after assembly due to the weight of the rotor rim 3 and the rotor magnetic pole 4 is reduced by the amount of rigidity of the rotor spoke in the radial direction compared to the conventional structure. Axial displacement increases.

Therefore, in the eighth embodiment, the erected bone or intermediate joint is an angle that corrects the amount of displacement of the outer periphery of the rotor spoke after assembly to the lower portion in the rotational axis direction due to the weight of the rotor rim and the rotor magnetic pole. in order to incline in advance axially upper member with respect to the horizontal cross section of the rotary shaft, an intermediate coupling member arranged between the first Tatsukotsu 2 _-5 and second Tatsukotsu _2-6 wherein The upper surface length L1 in the radial direction of the telescopic body _{2-7, the} cylindrical member 7 or the absorbing member 8 (9) is shorter than the lower surface length L2 by a predetermined dimension (L1 <L2), and the rotation is performed in a state before assembly. is obtained by the attachment inclined upward by a predetermined angle θ relative to a horizontal cross section of the rotating shaft and the second Tatsukotsu 2 _-6 which is a component of a child spokes 2. After assembly, the angle θ of the rotor spoke 2 becomes zero or close to zero.

  In addition, when this embodiment is applied to FIG. 7 or FIG. 8, it can implement | achieve if the attachment angle of the standing bone 2-6 with respect to the rotating shaft 1 inclines in the axial direction upper part only (theta).

[Embodiment 9]
FIG. 10 is a plan view of the main part of the rotor of the vertical shaft type rotating electric machine according to the ninth embodiment.
In the tenth embodiment, as shown in FIG. 10, the first standing bone 2 ₋₅ and the second standing bone 2 ₋₆ are connected by a link 9.

According to the present embodiment 10, the compressive force of the inner diameter direction by shrink fitting, can be absorbed by the second Tatsukotsu _2-6 is lifted.

1 ... rotary shaft, 2 ... rotor spokes, 2 _-2 ... key bar, 2 _-3 ... reinforcing disc 2 _-4 ... reinforcing disc 2 _-5 ... first Tatsukotsu, _2-6 ... second 2 Tatsukotsu, _2-7 ... elastics, 3 ... rotor rim, 4 ... rotor poles, 5 ... Rimuki, _{6-1, 6-2} ... bolt, 7,7 _-1, 7 _-2 ... cylindrical member , 8, 9 ... Absorbing member, 10 ... Link.

Claims (10)

A plurality of plate-like standing bones that are fixed to a rotating shaft arranged in a standing position and extend in the radial direction, a disk-shaped reinforcing material that connects the side surfaces of the plate-like standing bones, and the outer diameter side of the standing bone A rotor spoke formed by a key bar attached to an end face, an annular rotor rim shrink-fitted on a key bar provided on the outer periphery of the rotor spoke, and a salient pole attached to the outer periphery of the rotor rim In a rotor of a vertical shaft type rotating electric machine constituted by a plurality of rotor magnetic poles,
The plate-like erected bone constituting the rotor spoke is divided into a plurality of pieces in the radial direction, and the divided vertebrae are joined together by an intermediate joining member that reduces the rigidity of the rotor spoke in the radial direction. A rotor of a vertical shaft type rotating electrical machine characterized by   The rotor of a vertical shaft type rotating electrical machine according to claim 1, wherein the intermediate joint member is formed of a member having an elastic coefficient smaller than that of the standing bone.   The rotor of the vertical shaft type rotating electrical machine according to claim 2, wherein the intermediate joint member is formed by connecting the divided vertebrae with bolts.   The rotor of a vertical shaft type rotating electrical machine according to claim 1, wherein said vertebrae are joined together by a cylindrical member as an intermediate joining member for joining said divided vertebrae.   The rotor of a vertical shaft type rotating electrical machine according to claim 4, wherein two or more cylindrical members are arranged and joined in a radial direction.   The rotor of a vertical shaft type rotating electrical machine according to claim 1, wherein the intermediate joint member is a member capable of absorbing a compressive force in a radial direction of the standing bone. A plurality of plate-like standing bones that are fixed to a rotating shaft arranged in a standing position and extend in the radial direction, a disk-shaped reinforcing material that connects the side surfaces of the plate-like standing bones, and the outer diameter side of the standing bone A rotor spoke formed by a key bar attached to an end face, an annular rotor rim shrink-fitted on a key bar on the outer periphery of the rotor spoke, and a plurality of salient poles attached to the outer periphery of the rotor rim In a rotor of a vertical shaft type rotating electric machine composed of a single rotor magnetic pole,
A rotor of a vertical shaft type rotating electrical machine, wherein a space portion is provided at a joint portion between the vertical shaft and a rotating shaft, leaving an upper end portion and a lower end portion. A plurality of plate-like standing bones that are fixed to a rotating shaft arranged in a standing position and extend in the radial direction, a disk-shaped reinforcing material that connects the side surfaces of the plate-like standing bones, and the outer diameter side of the standing bone A rotor spoke formed by a key bar attached to an end face, an annular rotor rim shrink-fitted on a key bar on the outer periphery of the rotor spoke, and a plurality of salient poles attached to the outer periphery of the rotor rim In a rotor of a vertical shaft type rotating electric machine composed of a single rotor magnetic pole,
A rotor of a vertical shaft type rotating electrical machine, characterized in that a long hole in the rotational axis direction is provided in a radial intermediate portion of the standing bone.   A horizontal cross section of the rotating shaft of the rotating shaft is set at an angle that corrects the amount of displacement of the outer periphery of the rotor spoke after assembly to the lower portion in the rotating shaft direction due to the weight of the rotor rim and the rotor magnetic pole. The rotor of the vertical shaft type rotating electrical machine according to any one of claims 1 to 8, wherein the rotor is inclined in advance in the axial direction with respect to the vertical axis.   The rotor of the vertical shaft type rotating electrical machine according to claim 1, wherein the intermediate joint member is a link mechanism that joins the divided vertebrae.

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