JPS5930025B2 - How to install a water turbine generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the installation method of a water turbine generator.

Conventionally, when installing a water turbine generator, the stator is first assembled and installed at a predetermined installation location, and then the rotor is suspended into the hollow part of the stake using a crane.

However, for this type of installation work, the rotor must be completely assembled, which increases the total weight of the rotor assembly and requires the installation of a large crane with a large capacity.

In addition, this type of generator often requires maintenance and inspection work, and in this case as well, the yoke must be lifted by a crane, so the crane installed at the time of installation of the water turbine generator is left in place.

Therefore, this type of crane is always idle equipment, which is economically undesirable.

Furthermore, in order to assemble the rotor assembly in a completed state,
There is a drawback that dust easily enters the gap between the magnetic poles formed on the outer peripheral surface of the rotor during installation work, and it is also difficult to clean and remove this dust.

Therefore, the inventor conducted extensive research into an economical way to install a water turbine generator by omitting the large crane equipment, which is always an expensive idle facility, and by installing the rotor in a removable manner. First assemble the rotor at the installation location,
Next, at the stator installation location on the outer periphery of the rotor, a plurality of multiple jacks, which are constructed by placing a jack on the top of a jack stand in which a plurality of stand units are stacked, are arranged at predetermined intervals, and A stator assembly base is constructed by providing a rest stand with a plurality of stand units stacked to approximately the same level adjacent to each multiple jack, and the supporting surface of the stator assembly base equipped with these multiple jacks is connected to the rotor. The stator assembly, which is divided into multiple parts, is assembled on the support surfaces of these assembly bases, and then the support surfaces of the multiple jacks that support the stator are lowered one after another. As a result, when installing the rotor, a small-capacity crane can be temporarily installed to disassemble and reassemble the rotor, and when installing the stakes, multiple jacks to support the stakes can be used to distribute the load. The inventors have found that it is possible to use a multi-jaw jack that is easy to handle, and it is also possible to facilitate cleaning of the outer peripheral surface of the rotor when the rotor and stake are finally assembled.

Furthermore, by adopting the installation method described above, maintenance and inspection after installation can be accomplished by lifting the stator using the action of multiple jacks, eliminating expensive idle equipment and reducing crane capacity and equipment costs. It turns out that it is possible to achieve this.

Therefore, the general object of the present invention is to reduce the crane capacity and eliminate large idle equipment by making the rotor capable of being disassembled and assembled and by configuring the stator to be moved up and down by multiple jacks. An object of the present invention is to provide a method for installing a water turbine generator that can reduce costs.

In order to achieve the above object, in the present invention, a rotor center is mounted and fixed on a water wheel shaft, a rotor yoke is assembled around the outer periphery of the rotor center, and then a pole is assembled to assemble the rotor. A plurality of multi-jaw jacks are installed at predetermined intervals, and the jacks are placed on the top of a jack stand in which a plurality of stand units are piled up on the outside foundation of the yoke assembled in the same manner. Multiple stand units are installed adjacent to the continuous jack.
Rest stands stacked up to a level constitute a stator assembly base, and after assembling the stator divided into multiple parts on this base, the jacks of the multiple jacks are raised and lowered while adjoining rest stands and jacks are assembled. It is characterized in that the stake stand units are sequentially and alternately removed, the stake assembly base is lowered in stages, and the stake is installed in a predetermined position.

Next, an embodiment of the method for installing a water turbine generator according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of essential parts showing the assembled state of the rotor and stator in the generator portion of a water turbine generator. In the present invention, the rotor 10 is first assembled and installed.

That is, the rotor 10 is composed of a rotor center 12, a rotor yoke 14, and a pole 16. First, the rotor center 12 is mounted and fixed on a water wheel shaft (not shown) using a crane or the like.

Next, the rotor yoke 14 is attached to the outer periphery of the rotor center 12, and the pole 16 is further attached to the outer periphery of the rotor yoke 14.

As described above, in the method of the present invention, the rotor 10 is disassembled and assembled from the center side, so that the capacity of the crane required for assembling the yoke 10 can be significantly reduced compared to the conventional method.

Next, a workbench 18 is temporarily installed on the top of the rotor 10 that has been assembled and installed in this manner.

Further, a plurality of multiple jacks 22 are arranged at a predetermined distance on the outer periphery of the yoke 10, that is, the location where the stator 20 is installed, and the supporting surfaces of these multiple jacks 22 are placed above the position of the workbench 18. Set to .

In this case, rest stands 24 that are movable in correspondence with the support surfaces of the multiple jacks 22 are provided, respectively, to constitute an assembly base for the stator 20 (see FIG. 2).

However, the multiple jack 22 is constructed by placing a jack 25 on the top of a jack stand 23 which is constructed by stacking a plurality of stand units 21 (see FIG. 3a).

On the other hand, the rest stand 24 is
3, a plurality of stand units 21 are stacked and arranged (see FIG. 3a).

In this way, the stator unit, which is divided into a plurality of parts in the circumferential direction, can be assembled on the assembly base formed by the plurality of multiple jacks 22 and the rest stand 24 (see Fig. 2). .

Therefore, in this case, as shown in FIG. 1, the worker stands on the workbench 18 and assembles the stator 20 on the assembly base.

When the assembling work of the stator 20 is completed, the next step is to move the stake 20 downward relative to the already installed rotor 10.

However, according to the method of the present invention, the outer circumferential surface of the rotor and the inner circumferential surface of the stator are placed in an extremely easy-to-work condition, so that the cleaning work can be accomplished easily and quickly.

As is clear from FIG. 3a=f, the lowering operation of the stake 20 is performed by moving the plurality of multiple jacks 22 constituting the assembly base of the stator and each stand unit 21 of the rest stand 24 attached thereto at the same time. This is achieved by sequentially removing them at different timings.

In this case, by raising and lowering the jacks 25 placed on the top of each jack stand 23 at the same timing, each stand unit 21 can be sequentially and smoothly removed, and the stator 20 can be lowered safely. can.

In addition, during the continuous lowering operation of the jack 25, an auxiliary support 26 is appropriately interposed on the rest stand 24 side to prevent the assembly base surface from becoming suddenly unbalanced in the event of a failure of the jack 25, etc. .

By completely lowering the stator 20 and removing all the multiple jacks 22 and rest stands 24, the assembly and installation of the water turbine generator is completed.

According to the method of the present invention, since the rotor is installed with priority,
It is no longer necessary to use a large-capacity crane to lift the already completed rotor as in the past, and the rotor can now be disassembled and assembled using a relatively small-capacity crane.
Moreover, the crane used in this case can be removed immediately after installation.

In addition, the stator is assembled and installed using multiple highly portable multi-jackets, which not only makes the installation convenient for later storage, but also makes the environment around the generator significantly better than before. Not only this, but also the cleaning work of the outer periphery of the rotor and the inner periphery of the stator, especially during the installation of the stator, can be accomplished efficiently.

Furthermore, maintenance and inspection of the generator can be accomplished by sequentially stacking the stator with the multiple jacks and the stand units of the rest stand in the opposite manner to the above, and therefore the work is significantly improved.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts showing the installation state of a water turbine generator implementing the method of the present invention, Fig. 2 is an explanatory plan view showing the assembled state of the stake, and Fig. 3 a = f shows the installation of the stator. It is an explanatory diagram of the operation of the multiple jack and rest stand. 10... Rotor, 12... Rotor center, 14... Rotor yoke, 16...
Pole, 18... Workbench, 20... Stator, 21... Stand unit, 22...
...Multiple jack, 23... Jacket stand, 24... Rest stand, 25...
... Jyatsuki, 26... Auxiliary support.

Claims (1)

[Claims] 1 Place and fix the rotor center on the water wheel shaft, then assemble the rotor yoke around the outer periphery of the rotor center, assemble the poles, and assemble the rotor. A plurality of multi-jaw jacks are arranged at predetermined distances, each consisting of a jack placed on the top of a jack stand in which stand units are stacked, and a plurality of stand units are arranged adjacent to each of the multi-jac jacks. Rest stands stacked to the same level constitute a stator assembly base, and after assembling the stator divided into multiple parts on this base, the jacks of the multiple jacks are raised and lowered while adjoining the rest stands. 1. A method for installing a water turbine generator, characterized in that the stator assembly base is lowered step by step by alternately removing the jack stand unit and the jack stand unit, and the stator is installed in a predetermined position.