JP5044929B2 - Cross-flow turbine runner, manufacturing method thereof, and hydroelectric generator - Google Patents

Description

The present invention relates to a crossflow turbine runner that rotates using hydraulic power, a method for manufacturing the runner, and a hydroelectric generator that generates power by rotating the crossflow turbine runner .

Some hydroelectric generators generate electricity by rotating a crossflow turbine with hydraulic power. In order to improve the wear resistance of a runner that is a rotating body of such a crossflow turbine, there is a technique of spraying a wear-resistant metal (see, for example, Patent Document 1). By the way, the runner of the cross-flow turbine is formed by forming mounting grooves at a pitch in a pair of side plates made of a casting, and attaching blades to the mounting grooves of these side plates.
Japanese Patent Laid-Open No. 5-263747

  As described above, there is a problem in that the manufacturing cost increases when the mounting grooves are formed in the pair of side plates made of casting at this pitch and the blades are attached to the mounting grooves of these side plates.

Accordingly, an object of the present invention is to provide a crossflow turbine runner that can reduce the manufacturing cost, a method for manufacturing the crossflow turbine runner, and a hydroelectric generator that includes the crossflow turbine runner .

In order to achieve the above object, an invention according to claim 1 includes a pair of side plates formed from a sheet material and a plurality of blades formed from the sheet material and supported by the pair of side plates. The pair of side plates includes a plurality of inner mounting holes arranged at equal pitches on the virtual circle and a plurality of outer sides arranged at equal pitches on a virtual circle concentric with the virtual circle and having a large diameter. An attachment hole is formed, and the blade includes an inner insertion portion and an outer insertion portion that are inserted into the inner attachment hole and the outer attachment hole of each of the pair of side plates. together are formed so as to protrude outward from parts, each inserting the inner insert and the outer insert portion of said blade to the inner mounting hole and the outer insertion hole of the side plate When the, characterized in that the outer peripheral end of the end portions of the blades are configured such that the positional relationship to match the outer peripheral edge of the side plate.

The invention according to claim 2 includes the crossflow turbine according to claim 1, and performs power generation using the crossflow turbine.

  The invention according to claim 3 is formed of sheet metal from a sheet material, and is arranged at equal pitch on a virtual circle concentric and large in diameter with respect to the plurality of inner mounting holes arranged at equal pitch on the virtual circle. A pair of side plates formed with a plurality of outer mounting holes, and a metal plate formed from a plate material, and an inner insertion portion and an outer insertion inserted into the inner mounting hole and the outer mounting hole of each of the pair of side plates. A crossflow turbine runner manufacturing method comprising a plurality of blades having a plurality of blades formed on both sides, wherein the pair of side plates are used in common while the inner insert portion and the outer insert portion have different intervals. By attaching, it is possible to manufacture a plurality of types of runners having different blade angles.

According to the first aspect of the present invention, it is formed by supporting a plurality of blades on a pair of side plates. Since the pair of side plates and the plurality of blades are formed by sheet metal, they are processed into a casting. The manufacturing cost can be reduced as compared with the case of applying. Furthermore, an inner insertion portion and an outer insertion portion are formed as axial projections projecting outward at both ends of the blade, and the outer peripheral ends of both ends of the blade are aligned with the outer peripheral edges of the side plates. Since the blade is supported by the pair of side plates by inserting the inner insertion portion into the inner mounting holes of the pair of side plates and inserting the outer insertion portion into the outer mounting holes of the pair of side plates, assembly is easy. In this respect, the manufacturing cost can be further reduced. Further, if the number of blades inserted is different for the same pair of side plates, a plurality of types having different numbers of blades can be easily manufactured. Furthermore, if multiple types of blades with different intervals between the inner insertion portion and the outer insertion portion that can be attached to the outer mounting hole that is closer to the inner mounting hole and the outer mounting hole that are far from each other are prepared, the angles of the blades are different. Multiple types can be easily manufactured.

According to the invention which concerns on Claim 2, it can be comprised suitably as a hydroelectric power generator which produces electric power using the runner for crossflow turbines which has the above effects.

  According to the third aspect of the present invention, the inner insertion portion is inserted into the inner mounting holes of the pair of side plates, and the outer insertion portion is inserted into the outer mounting holes of the pair of side plates, so that the blade becomes the pair of side plates. Although a pair of side plates are used in common, multiple types of runners with different blade angles can be manufactured by attaching blades with different intervals between the inner insert portion and the outer insert portion. A plurality of types of runners having different blade angles can be easily manufactured.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall configuration diagram showing a small-scale hydroelectric generator 11, and this small-scale hydroelectric generator 11 is installed in a water channel 12 having a height difference such as a creek. The small-scale hydroelectric generator 11 is connected to a water intake 13 installed in a water channel 12, a water intake conduit 14 having one end connected to the water intake 13, and the other end of the water intake conduit 14. A sand settling tank 15 that mainly settles and removes sediment from the water taken at the water intake 13, a power generation apparatus conduit pipe 16 connected at one end to the sand settling tank 15, and the other end side of the power generation apparatus conduit pipe 16. A power generation device 17 that generates electricity with the hydropower of water introduced through the power generation device water conduit 16 and a drain pipe 18 that returns water after passing through the power generation device 17 to the water channel 12 are provided. A sand settling tank 15 is installed at a lower position than the water intake 13, and a power generation device 17 is installed at a lower position than the settling tank 15.

  As shown in FIG. 2, the power generation device 17 is rotated by the hydraulic power of the case 21 connected to the power generation device conduit pipe 16 and the water introduced into the case 21 through the power generation device conduit pipe 16. A cross-flow turbine 23 having a runner (runner for a cross-flow turbine) 22, a hydroelectric generator unit 26 having a generator 25 driven by the rotation of the rotating shaft 24 of the runner 22, and the electric power generated by the generator 25 A control unit 29 having a battery 27 for storing and a controller 28 including an inverter is provided.

  This small-scale hydroelectric generator 11 is a small-scale device having a maximum output of 1 kW or less, and can be used as a regular power source in a place where there is no commercial power source. For example, a power source for farms, a mountain hut, and peripheral equipment It is used as a power source for lighting and septic tanks, a power source for wireless relay stations, a mobile power source for construction sites, and a power source for beast harm prevention fences.

  The runner 22 of the present embodiment shown in FIG. 3 includes a pair of disc-shaped side plates 31 shown in FIG. 4 and a plurality (specifically) arranged between the side plates 31 and supported by the side plates 31. 30 blades) shown in FIG. 5.

  The pair of side plates 31 are the same, and as shown in FIG. 4, a shaft insertion hole 34 through which the rotation shaft 24 is inserted is formed at the center position, and a virtual circle centering on this center position is formed. A plurality of, specifically four, mounting holes 35 shown in FIG. The pair of side plates 31 have a plurality of, specifically, 30 inner mounting holes 36 formed at equal pitches on a virtual circle centered on each center, and are concentric and large with respect to the virtual circle. A plurality of, specifically, 30 outer mounting holes 37 are formed at equal pitches on the diameter virtual circle.

  Each of the pair of side plates 31 is formed from a metal plate in the shape described above, but at least the outer diameter and the shaft insertion hole 34 are formed by punching, and the attachment holes 35 are formed. The inner mounting hole 36 and the outer mounting hole 37 are formed by stamping or drilling. A weld nut 39 shown in FIG. 4 is welded to each mounting hole 35 coaxially. A flange portion (not shown) fixed to the rotating shaft 24 shown in FIG. 2 common to the generator 25 is fixed to each weld nut 39 of the pair of side plates 31 with bolts.

The plurality of blades 32 all have the same shape. As shown in FIG. 5, each blade 32 has a rectangular main plate portion 41, and an axial protrusion that protrudes outward along the width direction from both ends in the length direction on both sides of the main plate portion 41 in the width direction. It is formed by pressing a metal plate material into a shape having an (inner insertion portion) 42 and a shaft-like projection portion (outer insertion portion) 43, and then the main plate portion 41 has a width at a plurality of positions in the length direction. By being bent with a press so that a crease is formed along the direction, an arc is formed as a whole. Spacing of the shaft-like projections 42 and the shaft-like protrusion 43 is equal to the distance between the predetermined distance and the inner mounting hole 36 and the outer mounting hole 37 of the side plate 31.

  The pair of side plates 31 and the plurality of blades 32 are assembled into the runner 22 as follows, for example.

First, one of the side plate 31 placed to the weld nut 39 on the upper side, with respect to the side plate 31, the blade 32, as shown in FIG. 6, the side of the outer peripheral end of the widthwise ends of the blade 32 plate 31 A shaft-shaped protrusion 42 as an inner insertion portion on one side in the width direction is inserted into the inner mounting hole 36 while being aligned with the outer peripheral edge of the inner mounting hole 36, and the outer mounting hole 37 spaced apart from the inner mounting hole 36 by the same width direction. A shaft-like projection 43 as an outer insertion portion on the side is inserted. Thus, when all the blades 32 are placed on the side plate 31, all the inner attachment holes 36 and the outer attachment holes 37 of the side plate 31 are filled with the blades 32. At this time, of course, the bending direction of all the blades 32 is set to face the same side in the circumferential direction of the side plate 31. Then, with the other side plate 31 facing down on the weld nut 39 and the phase of the mounting holes 35 aligned with the one side plate 31, the blades are inserted into the inner mounting holes 36 and the outer mounting holes 37. The axial projections 42 and 43 on the opposite side in the width direction of 32 are all inserted and placed on the plurality of blades 32. In this state, the upper shaft projections 42 and 43 of all the blades 32 are fixed to the upper side plate 31 by caulking or welding. Thereafter, the lower side plate 31 is held so as not to be detached from the blade 32, and the lower side plate 31 is turned upside down so that the lower side plate 31 is on the upper side. 42 and 43 are fixed to the side plate 31 on the upper side by welding or caulking.

  Thus, the same number (specifically 30) of blades 32 as the number of inner mounting holes 36 formed in one side plate 31, that is, the number of outer mounting holes 37, are supported by the pair of side plates 31. A runner 22 is formed.

  According to the present embodiment, the pair of side plates 31 is formed by supporting a plurality of blades 32. However, since the pair of side plates 31 and the plurality of blades 32 are formed from a sheet material, The manufacturing cost can be reduced as compared with the case where the casting is processed.

Further, while the outer peripheral ends of both end portions of the blade 32 are made to coincide with the outer peripheral edges of the side plates 31, the shaft-like protrusions 42 as the inner insertion portions are inserted into the inner mounting holes 36 of the pair of side plates 31, Since the blade 32 is supported by the pair of side plates 31 by inserting the shaft-like projections 43 as the outer insertion portions into the outer mounting holes 37 of the side plates 31, the assembly is easy, and in this respect, the manufacturing cost is further increased. Can be reduced.

  Here, as shown in FIG. 7, while using the same pair of side plates 31 as described above, by attaching the same blade 32 to the other one of the inner mounting holes 36 and the other of the outer mounting holes 37, Another type of runner 45 different from the above may be formed in which the number of inner mounting holes 36, that is, half of the number of outer mounting holes 37 (specifically, 15 blades) 32 is supported by a pair of side plates 31. Is possible. Furthermore, although illustration is omitted, by attaching the same blade 32 to every other two of the inner mounting holes 36 and every other of the outer mounting holes 37, the number of inner mounting holes 36, that is, the number of outer mounting holes 37 is one. It is also possible to form a runner in which / 3 (specifically, 10) blades 32 are supported by a pair of side plates 31. That is, by providing the blades 32 at positions that equally divide the number of the inner mounting holes 36 and the number of the outer mounting holes 37, different types of runners 45 with thinned blades 32 can be manufactured.

  As described above, if the number of blades 32 inserted into the same pair of side plates 31 is different, a plurality of types having different numbers of blades 32 can be easily manufactured.

Further, while using the pair of side plates 31 as described above in a common, by attaching the different blades 48 from the above interval of the shaft-like projections 42 and the shaft-like protrusion 43, the runner 49 with different blade 48 having angles It can be manufactured.

That is, with respect to the interval between the shaft-like protrusion 42 and the shaft-like protruding portion 43 of the blade 32 described above, the blade interval between the impact shaft-like raised portion 42 and the shaft-like protrusion 43 are different, for example, as shown in FIG. 8 Further, a blade 48 equal to the distance between the inner mounting hole 36 and the outer mounting hole 37 spaced apart from each other by a longer distance is formed in the same manner as described above, and a plurality of such blades 48 (specifically, 30) are formed. Sheet) By attaching to a pair of side plates 31, a runner 49 having a blade 48 having a different angle from the above can be manufactured. Further, although not shown in the drawing, a blade equal to the distance between the inner mounting hole 36 and the outer mounting hole 37 having a longer distance on the side plate 31 is formed in the same manner as described above, and a plurality of such blades (specifically, Is attached to the pair of side plates 31, so that a runner having a blade with a different angle from the above can be manufactured.

Thus, one more types of spacing is different between the outer mounting hole 37 and farther outer mounting hole 37 and each can be attached to a shaft-shaped protrusions 42 and the shaft-like protrusion 43 closer to the inner mounting hole 36 of the blade 32 , 48, the runners 22, 49 having the blades 32, 48 having different angles can be easily manufactured.

  Even when the angles are varied as described above, the blades 48 can be thinned out by providing the blades 48 at positions where the number of the inner mounting holes 36 and the number of the outer mounting holes 37 are equally divided. Furthermore, the number of inner mounting holes 36 and the number of outer mounting holes 37 can be further increased in order to allow more detailed angle changes of the blades.

1 is a perspective view showing an overall configuration of a small-scale hydroelectric generator to which a runner according to an embodiment of the present invention is applied. It is a perspective view which shows the electric power generating apparatus with which the runner of one Embodiment of this invention was applied. It is a perspective view which shows the runner of one Embodiment of this invention. It is a perspective view which shows the side plate of the runner of one Embodiment of this invention. It is a perspective view which shows the blade of the runner of one Embodiment of this invention. It is a partial side view which shows the runner of one Embodiment of this invention. It is a partial side view which shows the example of a change of the runner of one Embodiment of this invention. It is a partial side view which shows another modification of the runner of one Embodiment of this invention.

Explanation of symbols

22, 45, 46, 49 Runner (cross-flow turbine runner)
31 Side plates 32, 48 Blade 36 Inner mounting hole 37 Outer mounting hole 42 Shaft-shaped protrusion (inner insertion part)
43- axis projection (outside insertion part)

Claims (3)

A pair of side plates formed from sheet metal,
A plurality of blades formed from a sheet material and supported by the pair of side plates;
The pair of side plates include a plurality of inner mounting holes arranged at equal pitch on the virtual circle and a plurality of outer mounting holes arranged at equal pitch on a virtual circle concentric with the virtual circle and having a large diameter. And are formed,
The blade includes an inner insertion portion and an outer insertion portion that are inserted into the inner attachment hole and the outer attachment hole of the pair of side plates, respectively, and project outward from both end portions of the blade as axial protrusions. with are formed Te,
When the inner insertion portion and the outer insertion portion of the blade are respectively inserted into the inner mounting hole and the outer insertion hole of the side plate, the outer peripheral ends of both end portions of the blade are aligned with the outer peripheral edge of the side plate; It is comprised so that it may become . The runner for crossflow water turbines characterized by the above-mentioned . A hydroelectric power generator comprising the crossflow turbine runner according to claim 1, wherein power generation is performed using the crossflow turbine runner. A plurality of inner mounting holes that are formed of a sheet metal from a sheet material and are arranged at an equal pitch on the virtual circle, and a plurality of outer mounting holes that are arranged at an equal pitch on a virtual circle that is concentric with the virtual circle and has a large diameter. A pair of side plates formed with,
A cross-flow turbine for forming a sheet metal from a sheet material, and having a plurality of blades each having an inner insertion portion and an outer insertion portion that are inserted into the inner attachment hole and the outer attachment hole of each of the pair of side plates. A method of manufacturing a runner,
Cross flow characterized in that a plurality of types of runners having different angles of the blades can be manufactured by attaching the blades having different intervals between the inner insertion portion and the outer insertion portion while using the pair of side plates in common. A method for producing a runner for a water turbine.

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