JP7178658B2 - Open cross-flow turbine generator - Google Patents

Description

TECHNICAL FIELD The present invention relates to an open cross-flow turbine power generator that has high operational reliability and facilitates installation work, maintenance and inspection work, and the like.

In open waterways such as small rivers and agricultural water, water turbine generators are sometimes installed using drop structures. Turbines known as open cross-flow turbines are particularly suitable. This is because, as is well known, an open cross-flow turbine can be operated while allowing a portion of the water flow to overflow onto the runners, thereby smoothly discharging garbage, foreign matter, and the like to the downstream side. However, "open" here means "open type" without a water turbine casing.

The conventional open cross-flow turbine power generation equipment has a base frame installed downstream of the drop structure across the waterway, and a gate-shaped mounting frame installed via channel-shaped vertical members on the left and right of the base frame. , the runner of the open cross-flow turbine is assembled to the lower part of the gantry frame, and the generator is installed on the horizontal member of the upper part of the gantry frame (Patent Document 1). The runner and the generator are connected via a power transmission mechanism including a gearbox for direction change, and the power transmission mechanism is assembled to one of the strut members of the stand frame.

If the width of the water channel is large and the length of the runner in the axial direction is long, a power transmission mechanism is incorporated in each of the left and right strut members of the stand frame, and both ends of the runner shaft are connected to each power transmission mechanism. A configuration has also been proposed in which the output shafts of both power transmission mechanisms are connected to a common generator on a transverse member (Non-Patent Document 1). By dividing the power transmission mechanism into two systems, left and right, it is possible to reduce the size of components of the power transmission mechanism such as the gearbox.

JP 2014-125906 A

Website of Turboblade Co., Ltd. located in Oita City, Oita Prefecture, https://www.turboblade.jp/koredeki_s_water_03.html

According to such prior art, the entire power transmission mechanism including the gear box as well as the runner and generator are integrally mounted on the frame. Therefore, there is a problem that installation work, maintenance and inspection work, etc. tend to be complicated. In the latter prior art, since the output shafts of the two power transmission mechanisms connected to both ends of the runner are connected to a common generator, failure of the gearbox due to twisting of the runner in the axial direction, etc. There is a problem that it is likely to cause breakage, etc., and that the reliability of the entire operation is often impaired.

SUMMARY OF THE INVENTION In view of the problems of the prior art, an object of the present invention is to assemble a pair of left and right runners to a lower member of a gantry frame via a support stand, and to provide two independent power transmission systems from each runner to each generator. To provide an open cross-flow water turbine power generator that has high operational reliability and facilitates installation work, maintenance and inspection work, etc., by providing a mechanism.

In order to achieve this object, the configuration of the invention of claim 1 comprises a base frame in which left and right channel-shaped vertical members facing each other are erected on both ends of horizontal members, and left and right support members are horizontally arranged through the vertical members. Standing frames erected on both ends of the lower member on the member, a pair of runners arranged in a straight line and loaded on the lower member via individual support stands, and a pair of power generators mounted on the upper end of each support member Each runner and generator are individually connected via a power transmission mechanism incorporated in each strut member, and a cover is provided between each runner to commonly cover the bearings of each runner, and the cover is formed in an arc shape having substantially the same diameter as each runner.

In addition, an inclined plate that raises the water level may be installed on the upstream side of the runner. A water-conducting material may be attached to the water-conducting material, and an auxiliary material that curves along the outer circumference of the runner may be attached to the water-conducting material so that the height of each runner can be adjusted.

According to the fifth aspect of the invention, there are provided a base frame in which left and right channel-shaped vertical members opposed to each other are erected on both ends of a horizontal member, and left and right strut members are mounted on both ends of a lower member on the horizontal member via the vertical members. It comprises a standing frame, a pair of runners linearly arranged and loaded on the lower member via individual support stands, and a pair of generators mounted on the upper end of each support member, Each runner and generator are individually connected via a power transmission mechanism incorporated in each strut member, and an inclined plate that raises the water level is installed on the upstream side of the runner. A water guide material that curves along the outer circumference and guides the overflowing water onto the runner and flows down is attached, and the auxiliary material that curves along the outer circumference of the runner is attached to the water guide material so that the height of each runner can be adjusted. The gist of this is to attach

Further, instead of providing two pairs of runners, support stands, generators, and power transmission mechanisms, one pair each can be provided.

According to the construction of this invention, the pair of runners mounted on the lower member of the gantry frame are individually connected to the generators at the upper end of each strut member via power transmission mechanisms incorporated in each strut member. Therefore, there is no possibility that excessive force due to torsion of the runner or the like will be applied to each component of the power transmission mechanism from the runner to the generator, and it is possible to easily realize high operational reliability as a whole. can. In addition, each runner can be individually carried in and out of the mounting frame together with the support stand. Since it can be carried in and out individually, there is no need to use an excessively large crane facility, and maintenance work including installation work and maintenance and inspection work can be facilitated and simplified.

However, each support stand and each strut member shall be detachably fixed to the lower member, for example, by screwing. shall be connected via separable joints. In addition, the foundation frame shall be installed so as to position the runner on the mounting frame at an appropriate position on the downstream side of the drop structure of the open channel. By removing only one of the pair of runners, one-side operation using only the other runner and generator is also possible. However, at this time, the water on the side of the removed runner may be discharged downstream in the same manner as when the runner exists.

The cover provided between the runners is located in the center of the water channel and protects the bearing on one side of each adjacent runner from the water flow. The amount of water equivalent to that for the runner can be overflowed, and garbage, foreign matter, etc. from the upstream can be smoothly discharged to the downstream side.

The sloping plate on the upstream side of the runner raises the water level on the upstream side of the drop structure, causing the water overflowing the sloping plate to efficiently flow down onto the runner and overflow. In addition, the water conducting material at the tip of the inclined plate can further raise the water level on the upstream side and guide the overflowing water to an appropriate position on the runner to flow down. By adjusting the water level overflowing the runner, the height of the runner can be adjusted as appropriate depending on the amount of water in the water channel, and the position of the water flowing down onto the runner can be finely adjusted more easily.

If only one set each of the runner, the support stand, the generator, and the power transmission mechanism is provided, the usability of the water turbine generator can be further improved when the width of the water channel is small. However, the generator and the power transmission mechanism in this case need only be incorporated into one of the support members of the stand frame.

Central longitudinal section of overall configuration View corresponding to X arrow in FIG. Basic frame configuration explanatory diagram Configuration explanatory diagram of the support stand Explanatory drawing of cover structure View equivalent to Y arrow in FIG. Cross-sectional view equivalent to the ZZ line arrow in FIG. Configuration explanatory drawing of water conducting material and auxiliary material Loading/unloading operation diagram (1) Loading/unloading operation diagram (2)

Embodiments of the invention will be described below with reference to the drawings.

The open cross-flow water turbine power generator is composed mainly of a base frame 10, a mounting frame 20, a pair of runners 31, 31, and a pair of generators 32, 32 (Figs. 1 and 2). installed downstream. However, each runner 31 is a horizontal shaft type open cross-flow turbine installed in an open channel W.

The base frame 10 is constructed by erecting left and right channel-shaped vertical members 12, 12 at both ends of a rectangular tube-shaped horizontal member 11 (FIGS. 1 and 3). 3(A) to (C) are respectively a front view, a plan view and a side view of the base frame 10, and FIGS. 3(D) and (E) are respectively XX of FIG. They are an end view corresponding to the line arrow view and a cross-sectional view corresponding to the line YY.

A horizontal member 11 of the base frame 10 is installed across the water channel W on the water tap W2 on the downstream side of the drop structure W1. The left and right vertical members 12, 12 are embedded in wall surfaces W3 on both banks of the water channel W, respectively, and are opposed to each other with the water channel W interposed therebetween. In FIG. 3, the hatched portion indicates the portion of the wall surface W3 of the water channel W that contacts the concrete.

The gantry frame 20 is constructed by erecting left and right strut members 22, 22 on both ends of a rectangular tube-shaped lower member 21 (FIGS. 1 and 2). However, in FIG. 2, the left and right vertical members 12, 12 and the strut members 22, 22 are shown as a central longitudinal sectional view and an outline view, respectively. The same applies to the left and right portions of the transverse member 11 and the lower member 21 with respect to the breaking line K. As shown in FIG. The lower member 21 is installed on the horizontal member 11 of the base frame 10, and the left and right strut members 22, 22 are erected via the left and right vertical members 12, 12, respectively. A pair of inward and outward lifting tongues 22a, 22a, 22b, and 22b are attached to the upper end of each strut member 22, respectively.

A pair of left and right runners 31 , 31 are mounted in a straight line on the lower member 21 of the gantry frame 20 via individual support stands 33 . That is, the shaft 31a of each runner 31 is rotatably supported via bearings 31b, 31b at the upper ends of the left and right legs 33a, 33a of the support stand 33. As shown in FIG. Each support stand 33 has legs 33a, 33a on both ends of a base plate 33b (FIG. 4). rib plates 33c, 33c, and 33d are provided. A support plate 33e for the bearing 31b is fixed to the upper end of each leg 33a, and shelf plates 33f, 33f protruding to the left and right of the support plate 33e are attached to the upper end of one of the legs 33a. installed in a low position. However, FIGS. 4A to 4C are a front view, a plan view, and a side view of the support stand 33 without the shelf plates 33f and 33f, respectively.

One end of the shaft 31a of each runner 31 on the support member 22 side is connected to a gear box 41 inside the support member 22 via a flange joint 31c (FIG. 2). The gearbox 41 is a direction-changing gearbox that incorporates a miter gear or a bevel gear. 32 is connected to the downward shaft end. In addition, the gear box 41, the rotating shaft 42, and the gear box 43 form a power transmission mechanism 40 incorporated in the strut member 22, and the power generator 32 is mounted at the upper end of the strut member 22 to support the gear box 43. It is mounted downward on the upper surface of 32a (FIGS. 1 and 2). However, the speed-increasing gearbox 43 may be provided as required, and may be omitted.

Between the runners 31, 31, a cover 34 is provided to commonly cover the bearings 31b, 31b on one side of the runners 31 adjacent to each other. The cover 34 is constructed by attaching a bottom plate 34b to the lower end of a half-moon-shaped body portion 34a with an open bottom (FIG. 5). One end of the body portion 34a is closed together with the bottom plate 34b, and the other end is obliquely cut to form an opening 34c. 5A to 5C are a front view, a bottom view, and a side view of the opening 34c side of the cover 34, respectively.

The cover 34 is fixed via spacers 34d, 34d on respective shelf plates 33f, 33f of the adjacent legs 33a, 33a of the left and right support stands 33, 33 (FIGS. 1 and 2). However, FIG. 1 shows only the bearing 31b on the leg 33a of one support stand 33 and the spacer 34d, and the illustration of the spacers 34d and 34d is omitted in FIG. The cover 34 has an opening 34c directed toward the downstream side of the water channel W, and the upper portion of the main body 34a is curved in an arc substantially coaxial with the runners 31 and having the same diameter.

A water guide member 50 is disposed above the drop W1 of the waterway W to appropriately guide water from the upstream side of the waterway W to the runners 31, 31 (FIGS. 1 and 6).

The water guide member 50 includes an inclined plate 51 projecting obliquely upward from the upper end of the drop structure W1 toward the runners 31, 31, and obliquely symmetrical projections toward the downstream side of the water channel W at the left and right ends of the inclined plate 51. vertical guide plates 52, 52 and parallel plates 53, 53 extending above the runners 31, 31 in parallel with the channel W from the tips of the guide plates 52, 52 on the downstream side ( 1 and 7). The inclined plate 51 and the guide plates 52, 52 are fixed to the bottom surface W4 and wall surfaces W3, W3 of the water channel W on the upstream side of the drop structure W1 via horizontal mounting portions 51a and vertical mounting portions 52a, 52a, respectively. ing. In addition, the lower end of each parallel plate 53 is notched in an arc shape along the outer circumference of the runner 31, and appropriate A number of reinforcing ribs 51b, 52b, 53a are provided.

A horizontally elongated water conducting member 54 is attached to the upper surface of the tip portion of the inclined plate 51 , and horizontally elongated auxiliary members 55 , 55 are attached to the water guiding member 54 . The water guide material 54 is common to the runners 31, 31, and the auxiliary materials 55, 55 individually correspond to the runners 31, respectively. Further, the water guide material 54 and each auxiliary material 55 are curved in the short side direction along the outer circumference of the runner 31 (FIGS. 1, 8A and 8B). 8A and 8B are an exploded front view and an exploded side view of the water conducting material 54 and auxiliary materials 55, 55, respectively, and FIG. ) and (E) are plan views showing the assembly forms of auxiliary materials 55, 55 for the water conducting material 54, respectively.

The water guide member 54 is formed by integrally forming a body plate 54a having a plurality of ribs 54b, 54b, . (Fig. 8(A) to (C)). A plurality of bolt holes for fixing nuts 54d are formed on the lower surface side of the body plate 54a in double rows in the direction of the short side. 55a, 55a . . . are formed in double rows in the direction of the short side. Therefore, each auxiliary member 55 can be screwed to the water guide member 54 so that the height can be adjusted by selecting an appropriate bolt hole 55a and screwing a bolt into the nut 54d on the main body plate 54a side. (FIGS. 8(D) and (E)).

However, FIG. 8(D) shows a form in which the auxiliary materials 55, 55 are set at the lowest level with respect to the water conducting material 54, and FIG. 8(E) shows a form in which they are set at the highest level. 1, 6, and 7, the water conducting material 54 and the auxiliary materials 55, 55 are illustrated according to the form of FIG. 8(D).

Each auxiliary member 55 is formed with a slit 55b extending in the direction of the short side in order to accommodate the rib 54b of the water conducting member 54 (FIG. 8A). Cutouts 55c, 55c are formed on the opposite short sides to accommodate 54b. Also, the water guide member 54 can be screwed to the tip of the inclined plate 51 using the bolt holes 54e, 54e of the mounting plate 54c (FIGS. 1 and 8(C)).

The runners 31, 31 rotate when water from the upstream side of the water channel W flows down over the inclined plate 51, the water guide member 54, and the auxiliary members 55, 55. As shown in FIG. Therefore, each runner 31 can rotate the generator 32 through the gearbox 41, the rotary shaft 42, and the gearbox 43 of the power transmission mechanism 40 on the corresponding side to generate power individually.

On the other hand, each runner 31 disconnects the flange joint 31c between the corresponding gear box 41 (Fig. 9), and the suspension wire S1, the suspension member S2, the suspension wire S3, and the suspension wire S1 from the hook F of the crane equipment such as a crane vehicle. By suspending both ends of the shaft 31a through S3, the shaft 31a can be carried out from the lower member 21 of the gantry frame 20 while being integrated with the support stand 33, and can be carried into the lower member 21 from the outside. Each strut member 22 of the gantry frame 20 separates the flange joint 31c between the built-in gear box 41 and the corresponding runner 31 (Fig. 10), and the suspension wire S1 from the hook F of the crane equipment is used for lifting. By hanging on the tongues 22a, 22a, 22b, and 22b of the base frame 10, the lower member of the gantry frame 20 via the vertical member 12 of the base frame 10 remains integrated with the built-in power transmission mechanism 40 and the generator 32. 21 can be loaded and unloaded.

Each support stand 33 and each strut member 22 are detachably screwed to the lower member 21, respectively. Also, in FIG. 10, only one set of tongues 22a, 22b is illustrated.

In the above description, the runners 31, 31 have the same length in the direction of the axis 31a, and the generators 32, 32 have the same capacity. The corresponding generators 32, 32 may have different capacities. In addition, one set of runners 31, support stands 33, generators 32, and power transmission mechanisms 40 may be provided on the mounting frame 20. At this time, the generators 32 and the power transmission mechanisms 40 It may be mounted on the strut member 22 and housed.

This invention can reduce the size of the crane equipment required for maintenance work while maintaining the characteristics of an open cross-flow turbine that there are few troubles caused by garbage and foreign matter from the upstream side, so access is not good. It can be easily handled even at a site, etc., and can be widely and suitably applied as a water turbine power generation facility installed in any open channel.

DESCRIPTION OF SYMBOLS 10... Foundation frame 11... Horizontal member 12... Vertical member 20... Mount frame 21... Lower member 22... Support member 31... Runner 31b... Bearing 32... Generator 33... Support stand 34... Cover 40... Power transmission mechanism 51... Tilting plate 54... Water conducting material 55... Auxiliary material

Patent applicant Hokuryo Denko Co., Ltd.
ARCS Co., Ltd.

Claims (6)

A foundation frame in which left and right channel-shaped vertical members opposed to each other are erected on both ends of a horizontal member, and a mount frame in which left and right strut members are erected on both ends of a lower member on the horizontal member via the vertical members. , a pair of runners linearly arranged and mounted on the lower member via individual support stands, and a pair of generators mounted on the upper end of each of the support members, The machine is individually connected via a power transmission mechanism incorporated in each of the strut members, a cover is provided between the runners to cover the bearings of the runners in common, and the upper part of the cover covers the runners. An open cross-flow water turbine power generator characterized in that it is formed in an arc shape having substantially the same diameter as . 2. The open crossflow water turbine power generator according to claim 1 , wherein an inclined plate for raising the water level is installed on the upstream side of said runner. 3. The open cross flow according to claim 2 , wherein a leading end portion of said inclined plate is provided with a water guiding material that curves along the outer circumference of said runner and guides overflowing water onto said runner to flow down. Water turbine generator. 4. The open crossflow water turbine power generator according to claim 3 , wherein auxiliary members curved along the outer periphery of said runners are attached to said water conducting members so that the height of each runner can be adjusted. A foundation frame in which left and right channel-shaped vertical members opposed to each other are erected on both ends of a horizontal member, and a mount frame in which left and right strut members are erected on both ends of a lower member on the horizontal member via the vertical members. , a pair of runners linearly arranged and mounted on the lower member via individual support stands, and a pair of generators mounted on the upper end of each of the support members, The machines are individually connected via a power transmission mechanism incorporated in each of the strut members, and an inclined plate that raises the water level is installed on the upstream side of the runner. A water guiding material that curves along the outer circumference and guides overflowing water onto the runners and flows down is attached to the water guiding material, and an auxiliary material that curves along the outer circumference of the runner is attached to the water guiding material for each runner. An open crossflow water turbine power generator, characterized in that it is attached so that the height can be adjusted. 6. The open crossflow water turbine power generator according to claim 5 , wherein each of said runner, support stand, generator, and power transmission mechanism is provided in one set instead of two sets.

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