JPS63157632A - Water-wheel generator rotor - Google Patents

Abstract

PURPOSE:To make a rim key between a rotor spoke and a rotor rim unnecessary by forming said rotor spoke and rotor rim into an integral body. CONSTITUTION:A water-wheel generator rotor 5 is constituted by the lamination of two thick hollow discs 6 arranged in opposition to each other and a plurality of rotor rim plates 7 formed from thin steel plates. Further, said rotor is provided with a rotor rim 3, of which upper and lower parts, that is, both end sides as viewed from a direction of lamination are held between outer peripheral parts of the two hollow disks 6, and rim stud bolts 4 are made to pass through said two hollow disks 6 and rotor rim 3 and tighten them. In this manner, separate rotor spokes become unnecessary and said rotor can be manufactured easily.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a rotor for a water turbine generator, and in particular to a water turbine that is capable of facilitating production and assembly and reducing production costs. It concerns the rotor of a generator.

(Prior Art) Conventionally, the rotor of this type of water turbine generator, as shown in a partial cross-sectional view in FIG. It is composed of a rotor rim 3 made of a steel plate and laminated with a plurality of rotor rim plates, and the rotor rim 3 is fastened with rim stud bolts 4 to form an integral structure. The rim key 2 is inserted into the rim key 2 to form an integrated structure. Here, the rim key 2 plays the role of transmitting torque from the rotor spokes 1 to the rotor rim 3.

However, the rotor of such a conventional water turbine generator has the following problems. That is, when assembling the rotor, it takes a long time to center the rotor spokes 1 and the rotor rim 3, and to align and drive the rim key 2. There is a problem in that groove machining and the like are extremely expensive.

(Problems to be solved by the invention) As mentioned above, the conventional water turbine 1! The problem with machine rotors was that manufacturing and assembling them was not only difficult and took a long time, but also that the manufacturing costs were extremely high.

The present invention has been made to solve the above-mentioned problems, and its purpose is to omit the rim key, simplify manufacturing and assembly, shorten working time, and reduce manufacturing costs. The purpose of the present invention is to provide a rotor for a water turbine generator with high reliability.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the rotor of the water turbine generator according to the present invention comprises two hollow discs arranged opposite to each other and
, a rotor rim formed by laminating a plurality of rotor rim plates formed from thin steel plates, and having both end sides in the lamination direction sandwiched between the outer peripheries of the two hollow discs,
The rotor rim is characterized by a structure in which the two hollow discs and the rotor rim are fastened together by passing a rim stud bolt through them.

(Function) In the rotor of the water turbine generator described above, since the rotor spokes and rotor rim are integrated, it is possible to omit the rim key that was required between the rotor spokes and the rotor rim. This makes it possible to easily manufacture and assemble the rotor, thereby reducing manufacturing costs.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a partial sectional view showing an example of the structure of a rotor of a water turbine generator II according to the present invention, and the same parts as in FIG. 3 are denoted by the same reference numerals.

In FIG. 1, the rotor 5 of the water turbine generator according to the present embodiment consists of two thick-walled hollow discs 6 disposed opposite each other, and a rotor formed of an IL steel plate as shown in FIG. It is made by laminating multiple rim plates 7.

and a rotor rim 3 which is sandwiched between the outer periphery of the two hollow disks 6 on both end sides in the stacking direction, which are the upper and lower parts in the drawing, and the two hollow disks 6 and the rotor rim 3 are The structure is such that the rim stud bolt 4 is passed through and fastened.

In the rotor of a water turbine generator configured as described above,
Since the rotor rim 3 is fastened and held between the outer peripheries of the two opposing hollow discs 6 via the rim stud bolts 4, the rotor spokes and rotor rim are integrated as in the conventional rotor spokes. Ru. Therefore, independent rotor spokes are no longer necessary, and there are two hollow disks 6, one upper and one lower, so that manufacturing is easy and the manufacturing cost is low.

In addition, for the reasons mentioned above, the rim key that was conventionally required between the rotor spokes and rotor rim is no longer necessary.
The rotor assembly work is cooled and becomes easier.

As described above, the rotor of the water turbine generator according to this embodiment includes two thick-walled hollow discs 6 disposed facing each other,
The rotor rim 3 is formed by laminating a number of rotor rim plates 7 made of thin steel plates, and both ends of the rotor rim plate 7 in the stacking direction are sandwiched between the outer peripheries of the two hollow disk plates 6, and Since the hollow disc 6 and the rotor rim 3 are fastened together by passing the rim stud bolt 4 through them, the rim key that was required between the rotor spokes and the rotor rim is omitted, and the manufacturing process 9 and assembly are simplified. As it is simple, it is possible to shorten the working time and reduce the manufacturing cost.

Note that the present invention is not limited to the embodiments described above, and can be implemented with various modifications without changing the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, a rotor rim plate is formed by layering two hollow discs disposed opposite to each other and a plurality of rotor rim plates formed from thin RLA plates, and a rotor rim whose both ends in the stacking direction are sandwiched between the outer peripheries of the two hollow disks, and the two hollow disks and the rotor rim are fastened together by passing rim stud bolts through the rotor rim. With this configuration, the rim key is omitted, making the manufacturing and assembly process easier, reducing work time, and providing an extremely reliable rotor for a water turbine generator that can reduce manufacturing costs. .

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of the rotor of a water turbine generator according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. FIG. 3 is a partial cross-sectional view showing the rotor. 1... Rotor spoke, 2... Rim key, 3...
・Rotor rim, 4...Rim stud bolt, 5...
- Rotor, 6... hollow disk, 7... rotor rim plate. Applicant's agent Patent attorney Takeshi Suzue Figure 1 Figure 2

Claims (1)

[Claims] Two hollow disks arranged opposite each other and a plurality of rotor rim plates made of thin steel plates are laminated, and both end sides in the lamination direction are on the outer periphery of the two hollow disks. What is claimed is: 1. A rotor for a water turbine generator, comprising: a rotor rim held between the two hollow discs and the rotor rim, the two hollow discs and the rotor rim being fastened together by passing a rim stud bolt through the rotor rim.