JPH06213132A - Vertical shaft hydraulic machine - Google Patents

Abstract

(57) [Abstract] [Purpose] Vertical shaft generator 13 driven by the vertical shaft turbine 1.
In the vertical type hydroelectric generator having the above, the upper cover 4 of the casing 6 of the water turbine can be taken out of the pit as it is without being disassembled in the narrow hydraulic pit 2. [Structure] The inner diameter of the minimum inner diameter portion of the upper part of the hydraulic pit 2 is made larger than the diameter of the upper cover 4 so that the upper cover 4 can be directly carried out of the hydraulic pit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic machine such as a hydraulic turbine generator, and more particularly to a vertical shaft type hydraulic machine such as a vertical shaft turbine generator.

[0002]

2. Description of the Related Art FIG. 6 is a vertical sectional view of a conventional vertical shaft hydroelectric generator. In this figure, a water turbine 1 is installed in a hydraulic pit 2 provided on a plant floor surface F, and has a casing 6 composed of a volute chamber 3 connected to an iron pipe (not shown) for introducing power water, an upper cover 4 and a lower cover 5. Have. In the casing 6, an annular speed ring 7 is arranged along the inner circumference of the spiral chamber 3, a guide vane 8 is arranged on the inner circumference of the speed ring 7 concentrically with the speed ring 7, for adjusting flow rate. A water turbine guide bearing arranged in a space surrounded by the guide vanes 8 and concentric with the speed ring 7, a rotatable runner 9, and a water turbine shaft 10 of the runner 9 rotatably supported at the center of the upper cover 4. 11 and the like are provided. The power water introduced from the spiral chamber 3 into the casing 6 and driving the runner 9 is discharged from the suction pipe 12 provided at the center of the lower cover 5.

Further, the generator 13 is installed in the generator pit 14 provided on the plant floor F like the hydraulic pit 2, and has a rotor 15 and a stator 1 concentrically surrounding the rotor 15.
6, a generator lower shaft 17 located in the center of the lower surface of the rotor 15 and directly connected to the water turbine shaft 10, a generator upper shaft 19 located in the center of the upper surface of the rotor 15 and supported by an upper guide bearing 18, and the like. The lower generator shaft 17 is supported by a lower guide bearing 20. Further, the load of the rotor 15 and the water thrust acting on the runner 9 are supported by the thrust bearing 21. In the figure, 22 is a guide vane operating mechanism, 23 is an electric fan, 24 is a brake device, 25 is a lower bearing bracket, and 26 is a water sealing device for sealing water around the water wheel shaft 10.

In the conventional turbine generator described above, the thrust acting on the rotating parts of the turbine 1, the generator 13, etc. is supported by the lower bearing bracket 25. When disassembling the turbine generator, usually follow the order below.
That is, the rotor 15 of the generator 13 is hung to lift the water turbine 1
Secure a space for carrying out the constituent members. Next, the guide vane operating mechanism 22, the upper cover 4, the guide vanes 8 and the like of the water turbine 1 are sequentially disassembled, and the stator 16 of the generator 13 is disassembled.
It will be carried out above the building through the inside of.

[0005]

In the conventional hydroelectric power generator having the above-mentioned structure, a large one in the component part of the water turbine 1, for example, the upper cover 4 and the like is left inside the stator 16 as it is,
It cannot pass through the upper part of the hydraulic pit 2 and must be once divided into a plurality of parts of a size that can be carried out in a narrow space inside the hydraulic pit 2 with a lot of trouble. In order to perform the above-mentioned division work in a narrow space, a lot of labor and time are required for removal and setup change. The present invention has been made based on the above circumstances, and provides a vertical hydraulic machine that is easy to disassemble and reassemble.

[0006]

A vertical shaft type hydraulic machine of the present invention comprises a casing having a spiral chamber for introducing power water from an iron pipe, an upper cover and a lower cover, a speed ring housed in the casing, A vertical axis hydraulic machine having a runner and a guide vane for adjusting power water to the runner, and having a rotating electric machine disposed above the runner and having a rotor connected to the runner, wherein a rotor load of the rotating electric machine is provided. And a water thrust load acting on the runner is supported by a thrust bearing provided on the upper cover of the casing, and the inner diameter of the minimum inner diameter portion of the hydraulic pit below the rotating electric machine is passed through the upper cover as it is. It is characterized by the size to be obtained.

[0007]

In the vertical shaft type hydraulic machine of the present invention having the above-mentioned structure, since the inner diameter of the minimum inner diameter portion at the upper part of the hydraulic pit is set to a size that allows the upper cover of the turbine casing to pass therethrough as it is, It is not necessary to assemble the upper cover in the narrow space of the hydraulic pit, and the disassembling does not require the disassembly of the upper cover in the narrow space.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 in which the same parts as those in FIG.
Is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a hydraulic pit 2 and a generator pit 14 accommodating the embodiment.
FIG. 3 is a vertical cross-sectional view in the first stage of assembly of the water turbine 1 shown in FIG. In FIG. 2, the minimum inner diameter of the hydraulic pit 2 is such that the upper cover 4 of the casing 6 can be passed through as it is.

As shown in FIG. 3, in the first stage of assembling the water turbine 1, the one in which the water turbine shaft 10 and the rotor 9 are fastened from the plant floor surface F side is placed in the hydraulic power pit 2 shown in FIG. It is hung down and temporarily placed on the lower cover 5 of the casing 6 previously installed in the hydraulic pit 2. Next, the guide vane 8 is carried into the hydraulic pit 2 and installed at a predetermined position on the lower cover 5. Further, the integrally assembled upper cover 4 is carried into the hydraulic power pit 2.

Next, as shown in FIG. 4, the water turbine guide bearing 13 and the water sealing device 26 are connected and assembled with the upper cover 4, and the guide vane operating mechanism 22 is connected and assembled with the guide vane 8 and the upper cover 4. Next, the stator 16 of the generator
Is carried into the generator pit 14, and is installed on the pillar 14a standing on the bottom surface of the generator pit 14. Next, the generator lower shaft 17 and the water turbine shaft 10 are connected.

Next, as shown in FIG. 5, a thrust bearing 24 for supporting the weight of the rotating portion is arranged on the generator lower shaft 17,
The thrust bearing 24 is supported by a conical support base 4a provided concentrically in the center of the upper cover 4 of the casing 6. Further, the lower guide bearing 20 is arranged on the generator lower shaft 17, and the rotor 15 of the generator 13 and the generator upper shaft 19 are connected to each other and engaged with the stator 16 of the generator 13 in this state. The rotor 15 and the generator lower shaft 17 are connected.

Finally, as shown in FIG. 1, the generator upper shaft 1
9 upper guide bearings 18 are assembled, the brake device 24 is arranged below the rotor 15, the plant floor surface F is installed, and the entire assembly is completed. Adjustment of gaps, installation of various pipes, etc. To do. It is obvious that the reverse operation of the above-mentioned assembly may be performed in order to disassemble the vertical axis type turbine generator.

In the vertical type turbine generator of the above embodiment, the inner diameter of the smallest inner diameter portion at the upper part of the hydraulic pit 2 is
Since it has a size that allows the upper cover 4 of the casing 6 of the water turbine to pass through as it is, the hydraulic pit 2 is required for assembly.
It is not necessary to assemble the upper cover 4 in the narrow space, and when disassembling the upper cover 4 in the narrow space,
Does not require disassembly. Therefore, not only can the time and labor required for assembly and disassembly be greatly reduced,
The reliability of the device itself can also be improved. Further, as a result of the time required for disassembling and reassembling being greatly reduced, the operating rate and operation efficiency of the power plant can be improved. The present invention can be applied to vertical shaft type hydraulic machines in general, and is not limited to the above embodiments. For example, like a hydraulic machine used in a pumped storage power plant, the turbine may be a turbine / pump that functions as a pump by reverse rotation, and the generator may be a generator / motor that also serves as an electric motor. Further, when it is simply used as a pump, the water turbine may be a dedicated pump and the generator may be a dedicated electric motor. Also, if the stator of the rotating electric machine is of a divided structure and the stator can be divided and moved laterally when the hydraulic machine is disassembled, the stator is not carried out of the generator pit, The top cover of the casing can be taken out of the pit.

[0014]

As is apparent from the above, in the vertical type hydraulic machine of the present invention, it is possible to remarkably save labor in disassembling and assembling the hydraulic machine by a simple means of slightly changing the size of the hydraulic pit. Therefore, the operation efficiency of the hydropower plant can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a hydraulic pit and a generator pit that house the embodiment.

FIG. 3 is a vertical sectional view in the first stage of assembling the water turbine according to the embodiment.

FIG. 4 is a vertical cross-sectional view in the first stage of the generator assembly of the above embodiment.

FIG. 5 is a vertical cross-sectional view in the second stage of the power generator assembly of the embodiment.

FIG. 6 is a vertical cross-sectional view of a conventional vertical shaft turbine generator.

[Explanation of symbols]

 1 ... Turbine 2 ... Turbine Pit 3 ... Vortex Chamber 4 ... Top Cover 5 ... Bottom Cover 6 ... Casing 7 ... Speed Ring 8 ... Guide Vane 9 ... Runner 10 ... Water Turbine Axis 11 ... Water Turbine Guide Bearing 12 ... Suction Pipe 13 ... Power Generation Machine 14 ... Generator pit 15 ... Rotor 16 ... Stator 17 ... Generator lower shaft 18 ... Upper guide bearing 19 ... Generator upper shaft 20 ... Lower guide bearing 21 ... Thrust bearing 22 ... Guide vane operating mechanism 23 ... Electric fan 24 ... Braking device 25 ... Lower bearing bracket 26 ... Water sealing device

Claims (2)

[Claims] 1. A vortex chamber for introducing power water from an iron pipe, a casing having an upper cover and a lower cover, a speed ring accommodated in the casing, a runner, and a guide vane for adjusting the power water to the runner. And a vertical shaft type hydraulic machine having a rotating electric machine arranged above the runner and having a rotor connected to the runner, the rotor load of the rotating electric machine and the water thrust load acting on the runner are A vertical shaft type hydraulic machine characterized by being supported by a thrust bearing provided on the upper cover, and having a size such that an inner diameter of a minimum inner diameter portion of a hydraulic pit below the rotary electric machine can pass through the upper cover as it is. . 2. The vertical hydraulic machine according to claim 1, wherein the stator of the rotary electric machine has a split structure, and each split piece can be moved laterally when split.