JPS627395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to vertical shaft type hydraulic mechanical equipment, and particularly to vertical shaft type hydraulic mechanical equipment that facilitates disassembly and assembly operations.

In general, hydroelectric power generation equipment as vertical shaft type hydraulic mechanical equipment is configured such that a generator is disposed in the upper part and a water turbine is provided in the lower part.

As shown in FIG. 1, conventional hydroelectric power generation equipment is comprised of a lower water turbine device 1 and a generator 2 placed on the upper part of this water turbine device 1. In the water turbine device 1, an impeller 4 attached to a vertical shaft 3 is connected to a spiral spiral casing (hereinafter simply referred to as a casing) 5 disposed on the outer circumference of the impeller 4, and stay vanes 6 fixed to upper and lower stay rings. The vertical shaft 3 is rotated while water is guided through a guide vane 7 and discharged through a draft pipe 8 below the impeller 4. Further, the generator 2 is supported by a stator pedestal 9 and a lower end bracket 10 on the upper part of the water turbine device 1, and is connected to the vertical shaft 3 to generate electricity.

However, in the hydroelectric power generation equipment with the above conventional structure,
For its installation, after completing the installation of the lower water turbine 1, the upper generator 2 must be assembled, and the main parts of the water turbine 1, such as the impeller 4 and guide vanes 7, must be disassembled. For inspection and repair, the generator 2 must be disassembled, and the parts of the water turbine device 1 must be disassembled in order so that the impeller 4, guide vanes 7, etc. can be taken out. For this reason, when installing the hydroelectric power generation equipment, the assembly of the generator 2 cannot proceed until after the assembly of the water turbine device 1 is completed, and there is a problem that the installation period is extended for a long time. In addition, when disassembling, inspecting and repairing the main parts, it is necessary to disassemble other parts than those targeted for repair, and even after the repair, reassembly is required, resulting in a very long period of time, during which time there is a power outage. There are problems in that it takes a long time, reduces the amount of power generated, is uneconomical, and requires a large number of workers. In particular, in large hydroelectric power generation facilities, when inspecting and repairing the water turbine device 1, workers can enter inside the machine and perform visual inspection and repair work, but in small and medium-sized power generation facilities, workers cannot enter inside the machine. It is necessary to disassemble the water turbine itself.
Furthermore, since the work involves disassembling parts other than the item to be repaired, there is a drawback that a large number of consumables such as seal parts between parts must be prepared.

These circumstances are the same in vertical shaft type pump equipment having a structure substantially similar to that of hydroelectric power generation equipment.

The purpose of the present invention is to focus on the above-mentioned conventional problems,
Vertical shaft hydraulic mechanical equipment, in which a hydraulic machine consisting of an impeller, casing, etc. is placed below operating equipment such as a generator, can be easily installed, disassembled and assembled, and improves machining work efficiency. The purpose is to provide vertical shaft type hydraulic mechanical equipment that can be improved.

In the present invention, the spiral casing is divided horizontally, the lower part of the stay vane is integrally fixed to the lower stay ring which is integrally fixed to the lower casing, and the upper stay vane is integrally fixed to the upper casing. The upper casing is removable from the ring, and the upper casing is removable from the lower casing together with the operating equipment, making it easy to disassemble and assemble the equipment, and the casing is divided at a position on the same plane as the lower surface of the upper stay ring.
This is designed to improve machining efficiency.

Hereinafter, a case in which the vertical shaft type hydraulic mechanical equipment according to the present invention is applied to hydroelectric power generation equipment will be described in detail with reference to the drawings from FIG. 2 onwards. Note that the same members as those in the conventional example (FIG. 1) described above are designated by the same numbers and the description thereof will be omitted.

Figure 2 shows an example of a vertical shaft type hydraulic mechanical equipment in which a spiral casing is divided horizontally. A casing 11 for guiding water from the circumferential direction to the impeller 4 is disposed on the outer circumference of the impeller 4 of the device 1, and further, the impeller 4 is introduced from an opening formed in the inner circumferential surface of the casing 11.
A stay vane 6 and a guide vane 7 are provided in the flow path portion leading to the inlet portion. The casing 11 has a substantially circular tubular cross section and is composed of an upper casing 12 and a lower casing 13 that are divided diametrically and horizontally. Flanges 14 and 15 are provided on the outer peripheries of the joint surfaces of the upper and lower casings 12 and 13, respectively, and by tightening them together with bolts, they are integrally coupled and can be separated into upper and lower parts. Further, the stay vane 6 provided in the flow path from the casing 11 to the impeller 4 has its upper and lower ends supported by an upper stay ring 16 and a lower stay ring 17, and the outer peripheral end of the upper stay ring 16 is integrated with the upper casing 12. is fixed, and
The outer peripheral end of the lower stay ring 17 is integrally fixed to the lower casing 13. Further, each of the upper and lower stay rings 16, 17 is further supported at its inner peripheral end side by an upper cover 18 and a lower cover 19, respectively.

As described above, the stay vanes 6 are attached to the upper and lower stay rings 16 and 17, and the stay vanes are fixed and erected to the lower stay ring 17 by welding or the like, and the upper ends of the stay vanes 6 are attached to the upper stay ring 16. On the other hand, bolted connections or, if the working pressure is low, free connections are possible. The guide vane 7 arranged on the impeller 4 side of the stay vane 6 is attached to a lower cover 19 interposed between the lower stay ring 17 and the shroud ring of the impeller 4.

On the other hand, the generator 2 mounted on the water turbine 1 is connected to an upper stay ring 16 and an upper cover 18 via a stator pedestal 9 and a lower end bracket 10.

In the vertical shaft hydraulic machine configured as described above, when inspecting the inside of the water turbine or converting the impeller 4, the connecting bolts of the flanges 14 and 15 of the casing 11 are removed, and the upper stay ring 16 and stay vane 6 are removed. By releasing the connection (which is not necessary in the case of a simple free connection), the water turbine device 1 can be separated vertically. If you lift generator 2 there,
The upper casing 12, upper stay ring 16, upper cover 18, impeller 4, etc. are lifted together with the generator 2, and the inside of the water turbine device 1 is exposed without disassembling the generator 2. In this case, since the stay vane 6 is not attached to the upper stay ring 16, the disconnected generator 2
The upper stay ring 16 is placed on the support block 20 on the side.
It can be placed with the surfaces in contact (see Figure 3).

By making the water turbine device 1 disassembleable in this way, the main parts inside the water turbine device 1 can be replaced, repaired and inspected extremely easily without disassembling the generator 2 at all, and the lower casing 13 and the lower It is now possible to inspect and repair the fixed side including the stay ring 17 etc. (Fig. 4) and the divided generator 2 side separately, thereby shortening the repair period. It is also possible to shorten the power outage period. Furthermore, since the generator 2 is not disassembled at all during assembly, there is no need to center the water turbine device 1 and the generator 2 again, resulting in high reliability after assembly.

5 to 7 show an embodiment of the present invention that not only facilitates disassembly and assembly, but also improves machining efficiency. In this embodiment, the dividing surface of the casing 11 is aligned with the inner surface of the upper stay ring 16, and the flanges 14 and 15 of the casing 11 are provided on the same plane extending from the connecting surface with the upper casing 12.

In such an embodiment, in particular, the upper stay ring 1
Since the machining surfaces of 6 and the flange 14 of the upper casing 12 are on the same plane, work efficiency during machining is good.

Although the above embodiment has been described with respect to a hydroelectric power generation facility, it is of course applicable to a vertical shaft type pump device having a similar structure.

As described above, according to the present invention, when performing inspection and repair work on hydraulic machines located below operating equipment such as generators, it is possible to disassemble only the necessary parts without disassembling the upper equipment. It is extremely easy to disassemble and assemble, and can improve work efficiency in machining.

[Brief explanation of the drawing]

Figure 1 is a partial longitudinal sectional view of a conventional hydroelectric power generation facility.
Figure 2 is a partial cross-sectional view showing an example of vertical shaft type hydraulic mechanical equipment with a divided spiral casing, Figure 3 is a partial vertical cross-sectional view of the generator side water turbine device of the equipment shown in Figure 2, and Figure 4 is FIG. 5 is a partial longitudinal sectional view of the fixed side water turbine device, FIG. 5 is a partial longitudinal sectional view of the vertical shaft type hydraulic mechanical equipment according to the embodiment of the present invention, and FIG. 6 is a partial longitudinal sectional view of the generator side water turbine device disassembled. , FIG. 7 is a partial vertical sectional view of the fixed side water turbine device. 1... Water turbine device, 2... Generator, 3... Vertical shaft, 4... Impeller, 5, 11... Casing, 6... Stay vane, 12... Upper casing, 13... Lower casing, 14, 15... Flange, 16... Upper stay Ring, 17...lower stay ring.

Claims (1)

[Claims] 1. An impeller attached to the vertical shaft, a spiral casing placed around the impeller,
A hydraulic machine includes upper and lower stay rings fixed to the spiral center side of the spiral casing, a stay vane installed between the upper and lower stay rings, and a guide vane arranged between the stay vane and the impeller. In addition, in vertical shaft type hydraulic mechanical equipment which is connected to the vertical shaft and has an operating device such as a generator installed on the top of the hydraulic machine, the spiral casing is divided horizontally, and upper and lower parts are removably connected to each other. The upper casing is removable from the lower casing together with the operating device, and each of the upper and lower stay rings is integrally fixed to the upper and lower casings, and the lower part of the stay vane is fixed to the upper and lower casings. A vertical shaft type, characterized in that the spiral casing is integrally fixed to the lower stay ring, the upper part is detachable from the upper stay ring, and the dividing position of the spiral casing is on the same plane as the lower surface of the upper stay ring. Hydraulic mechanical equipment.