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WO2018105429A1 - Acceleration duct - Google Patents

Acceleration duct Download PDF

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Publication number
WO2018105429A1
WO2018105429A1 PCT/JP2017/042464 JP2017042464W WO2018105429A1 WO 2018105429 A1 WO2018105429 A1 WO 2018105429A1 JP 2017042464 W JP2017042464 W JP 2017042464W WO 2018105429 A1 WO2018105429 A1 WO 2018105429A1
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WO
WIPO (PCT)
Prior art keywords
bottom plate
acceleration duct
duct according
cylindrical
side wall
Prior art date
Application number
PCT/JP2017/042464
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木　政彦
Original Assignee
株式会社ベルシオン
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Publication date
Application filed by 株式会社ベルシオン filed Critical 株式会社ベルシオン
Priority to KR1020197019545A priority Critical patent/KR20190110534A/en
Priority to CN201780075579.XA priority patent/CN110337540A/en
Publication of WO2018105429A1 publication Critical patent/WO2018105429A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/10—Submerged units incorporating electric generators or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B7/00—Water wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an acceleration duct that is disposed at a front portion of a rotor in a hydroelectric generator so that a water flow in a water channel can be accelerated and applied to a rotor blade.
  • Patent Document 1 discloses that a duct is disposed at a front portion of a water turbine rotor.
  • a turbine rotor is disposed inside a long duct, and the front end of the duct has a trumpet tubular shape with a large diameter.
  • the present invention provides an acceleration duct in which the width of the front portion of the duct is increased, the water flow is made closer to the side wall, and the water flow is accelerated and sent at the rear portion of the duct.
  • the present invention has taken the following technical means in order to solve the above-mentioned problems.
  • the middle portion of the inner side surface is curved inwardly bulging, and the height of the tip end portion is increased.
  • the acceleration duct according to any one of (1) to (4), wherein the height is set higher than the height of the cylindrical portion.
  • the lid portion is formed in a bowl shape from the front end portion of the side wall to the central portion of the front end of the cylindrical portion.
  • the bottom plate front portion of the cylindrical portion is gradually widened forward, and a side wall is erected on the side end portion thereof.
  • the water flow entering from the front of the wide bottom plate is gradually brought closer by the side wall to reach the cylindrical portion. Even if the water depth is shallow at half the height of the cylindrical part, if the width of the front part of the bottom plate is, for example, twice the width of the cylindrical part, the water flow entering the cylindrical part becomes full, and Since it is pressurized, it is accelerated more than the flow velocity of the water channel.
  • the width of the front end portion of the bottom plate is larger than the width of the cylindrical portion, for example, more than 1.5 times, and thus, for example, 1.5 times the flow rate in the water channel.
  • An amount of water flow can be directed to the tube.
  • one side end of the bottom plate is parallel to the cylindrical part, and the other side projects outwardly toward the tip, so the side part parallel to the cylindrical part is
  • the water flow is disposed close to the side wall of the water channel, the water flow can be gathered from the front end on the other side to collect the water flow in the tubular portion.
  • the roof wall extends from the end part of the side wall to the central part of the end of the tubular part. Since the cover portion is formed in a shape, the water flow passing along the inner surface of the side wall descends inward and downstream along the cover portion and passes to the cylindrical portion.
  • the tip of the water guide plate is brought into close contact with the bottom surface of the water channel by water pressure.
  • the bottom layer flow can be guided into the duct.
  • the side plate is made of an elastic material, when installed in a water channel, it is not easily damaged even if it collides with a side wall or a large falling material collides. . Moreover, since it has elasticity, it adheres to a side wall surface, water leakage does not arise, and the fall of the water pressure concerning a duct can be suppressed.
  • FIG. 7 is a longitudinal sectional side view taken along line VII-VII in FIG. 6. It is a front view in FIG. FIG. 7 is a rear view in FIG. 6.
  • an acceleration duct 1 has a front portion of a bottom plate 3 of a cylindrical portion 2 that extends forward in plan view, and projects rightward in a right view in FIG. Yes.
  • the left side surface when viewed from the right side is linear with the cylindrical portion 2.
  • Side walls 4 and 5 are erected on left and right ends of the bottom plate 3, respectively.
  • the right side wall 4 rises gradually from the front end of the cylindrical portion 2 to the front end of the side wall 4, and its upper surface is a curved surface.
  • the left side wall 5 is substantially the same height as the cylindrical portion 2 and has a straight shape. Thus, the left side wall 5 is brought into contact with the side wall of the water channel and is fixed by a rope or the like.
  • each side wall 4, 5 From the upper surface of each side wall 4, 5, the inwardly hooked lid parts 6, 7 have a constant width and extend from the front end to the front end of the cylindrical part 2, and the side walls 4, 5 and the lid part
  • the boundary with 6 and 7 is an arc curved surface.
  • the left and right support legs 8, 8 are arranged on the front surface of the bottom surface of the bottom plate 3 so that the height can be adjusted.
  • a water guide plate 9 that is inclined downward is disposed at the front end of the bottom plate 3 so that the front portion is in contact with the bottom of the water channel R.
  • the water guide plate 9 is made of an elastic material such as synthetic rubber so that the lower surface of the front end can be in close contact with the bottom of the water channel.
  • FIG. 5 is a side view showing a state where the acceleration duct 1 is used in a water channel.
  • an outward flange 10 is formed on the rear end peripheral surface of the cylindrical portion 2 of the acceleration duct 1.
  • the outward flange 10 is connected to the outward flange 13 of the support ring 12 of the hydroelectric power generation unit 11.
  • a suspension pipe 14 that protrudes from the upper portion of the support ring 12 is suspended from a suspension frame 15 that is installed between both banks of the water channel R.
  • the upper end of the suspension pipe 14 is connected to the generator 16. It is connected to.
  • a bearing housing 17 is fixed to the lower end portion of the suspension tube 14.
  • a rotor 18 is fixed to the tip of the rotor shaft that is horizontally supported by the bearing housing 17.
  • the rotor shaft is connected to the generator 16 via a transmission shaft (not shown) in the suspension pipe 14.
  • the rearward outward flange 13 ⁇ / b> A of the support ring 12 is connected to the frontward outward flange 20 of the drainage duct 19 connected to the rear part.
  • the drainage duct 19 has a larger diameter at the rear port 19A than at the front port 19B.
  • the water flow brought to the center of the bottom plate 3 advances to the cylindrical part 2 while raising the water level, passes through the cylinder part 2 in full, and applies a uniform water pressure to the rotor 18 immediately after it to rotate it. Let Just before the tubular portion 2, excess water overflows and passes over the upper surface of the tubular portion 2.
  • the rear opening 19 ⁇ / b> A is formed larger than the front opening 19 ⁇ / b> B, so that the inside of the support ring 12 in which the rotor 18 is accommodated becomes a bottleneck, and the passage speed of the water flow becomes high.
  • the drain duct 19 has a large rear opening 19A, the rear portion of the drain duct 19 has a negative pressure rather than the water pressure applied to the inside of the support ring 12, and the front water flow becomes a high-speed flow due to the difference in water pressure. And the rotational efficiency of the rotor 18 can be increased.
  • the bottom surface of the irrigation channel R has a slope
  • the acceleration duct 1 has the front portion lifted higher by the support column 8, so that the water flow passing through the inside is subjected to gravity and the flow velocity is faster than the water flow in the water channel R.
  • FIG. 6 is a plan view showing another embodiment of the acceleration duct.
  • the same members as those of the previous example are denoted by the same reference numerals and description thereof is omitted.
  • the acceleration duct 1 is divided into two parts from the center of the width in plan view, and the right and left coupling parts 1 ⁇ / b> C and 1 ⁇ / b> C are joined together by bolts 1 ⁇ / b> D.
  • the left and right side walls 4 and 5 of the acceleration duct 1 are formed symmetrically. Thereby, a large-sized duct can also be easily manufactured with a metal mold. Moreover, since it can be transported to the site and assembled on site, it is excellent in transportation and workability. In addition, lifting is suppressed by fixing a weight to the lower surface of the front part of a baseplate so that attachment or detachment is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The present invention provides an acceleration duct to be disposed on the front of a rotor blade and having a shape in which the front portion of a bottom plate of a cylindrical section located in the rear is extended and formed into a gutter-like shape having a wide tip width to collect and accelerate a small amount of water. A front portion of a bottom plate (3) of a cylindrical section (2) located in the rear of a duct (1) is extended into a flat shape the width of which gradually increases toward the front, and sidewalls (4), (5) are disposed upright on the sides while the top is left open, thereby displacing and raising water coming in from the front before allowing the water to pass into the cylindrical section (2).

Description

加速ダクトAcceleration duct
　本発明は、水力発電機におけるロータの前部に配設され、水路の水流を、加速させて、ロータブレードに当てることができるようにした加速ダクトに関する。 The present invention relates to an acceleration duct that is disposed at a front portion of a rotor in a hydroelectric generator so that a water flow in a water channel can be accelerated and applied to a rotor blade.
　水車ロータの前部にダクトを配設することは、例えば特許文献１に記載されている。 For example, Patent Document 1 discloses that a duct is disposed at a front portion of a water turbine rotor.
特開２０１０－１１２１９４号公報JP 2010-112194 A
　特許文献１に記載の発明は、長いダクトの内部に、水車ロータを配設するものであり、ダクトの前端をラッパ管状に大径としてあるが、前端が大径であっても、通過する水量が大量になる事はなく、また加速されることはない。
　本発明は、ダクトの前部の幅を大とし、側壁で水流を幅寄せして、水流をダクトの後部において加速させて送るようにした、加速ダクトを提供するものである。 In the invention described in Patent Document 1, a turbine rotor is disposed inside a long duct, and the front end of the duct has a trumpet tubular shape with a large diameter. However, even if the front end has a large diameter, the amount of water passing therethrough Will never become large, nor will it be accelerated.
The present invention provides an acceleration duct in which the width of the front portion of the duct is increased, the water flow is made closer to the side wall, and the water flow is accelerated and sent at the rear portion of the duct.
　本発明は、前記課題を解決するために、次のような技術的手段を講じたものである。 The present invention has taken the following technical means in order to solve the above-mentioned problems.
　（１）後部における筒状部の底板前部を延伸し、前方へ次第に広幅となる平坦状とし、その側部に側壁を立設し、かつその上部を解放としてなる加速ダクト。 (1) An accelerating duct in which the front part of the bottom plate of the cylindrical part at the rear part is stretched to have a flattened shape that gradually becomes wider, the side wall is erected on the side part, and the upper part is opened.
　（２）前記、底板の前端部分の幅は、筒状部の幅より大としてある前記（1）に記載の加速ダクト。 (2) The acceleration duct according to (1), wherein the width of the front end portion of the bottom plate is larger than the width of the cylindrical portion.
　（３）前記、底板の側端部の一側は筒状部と平行であり、同じく他側は、先端にかけて外側方向へ突出している前記（1）または（2）に記載の加速ダクト。 (3) The acceleration duct according to (1) or (2), wherein one side of the side end portion of the bottom plate is parallel to the cylindrical portion, and the other side is projected outward toward the tip.
　（４）前記、底板の側端部は、左右対称に形成されている前記（1）または（2）に記載の加速ダクト。 (4) The acceleration duct according to (1) or (2), wherein the side end portions of the bottom plate are formed symmetrically.
　（５）前記、側壁の先端部が、筒状部の外面よりも外側へ突出しているものにおいては、その内側面の中間部を内方へ膨出状に湾曲させ、かつ、先端部の高さが、筒状部の高さよりも高く設定されている前記（1）～（4）のいずれかに記載の加速ダクト。 (5) In the case where the tip end portion of the side wall protrudes outward from the outer surface of the cylindrical portion, the middle portion of the inner side surface is curved inwardly bulging, and the height of the tip end portion is increased. The acceleration duct according to any one of (1) to (4), wherein the height is set higher than the height of the cylindrical portion.
　（６）前記、側壁の先端部上部が、筒状部の高さよりも高いものにおいては、側壁の先端部分から、筒状部先端の中央部へかけて庇状に被蓋部が形成されている前記（1）～（5）のいずれかに記載の加速ダクト。 (6) When the upper end portion of the side wall is higher than the height of the cylindrical portion, the lid portion is formed in a bowl shape from the front end portion of the side wall to the central portion of the front end of the cylindrical portion. The acceleration duct according to any one of (1) to (5).
　（７）前記、底板の先端部には、前下方へ傾斜する弾力性のある導水板が配設されている前記（1）～（6）のいずれかに記載の加速ダクト。 (7) The acceleration duct according to any one of (1) to (6), wherein an elastic water guide plate that is inclined forward and downward is disposed at a front end portion of the bottom plate.
　（８）前記、筒状部の後端部の周面には、他の管体と連結するための外向フランジが形成されている前記（1）～（7）のいずれかに記載の加速ダクト。 (8) The acceleration duct according to any one of (1) to (7), wherein an outward flange for connecting to another tubular body is formed on a peripheral surface of a rear end portion of the cylindrical portion. .
　（９）前記、筒状部とこれに連続する底板部分を、連結可能に左右に分割状としてある前記（1）～（8）のいずれかに記載の加速ダクト。 (9) The acceleration duct according to any one of (1) to (8), wherein the cylindrical portion and a bottom plate portion continuous therewith are divided into left and right parts so as to be connectable.
　（10）前記、側板が弾力性のある材質で形成される前記（１）～（９）のいずれかに記載の加速ダクト。 (10) The acceleration duct according to any one of (1) to (9), wherein the side plate is formed of an elastic material.
　本発明によると、次のような効果が奏せられる。 According to the present invention, the following effects can be obtained.
　前記（1）に記載の発明においては、筒状部の底板前部が、前方へ次第に幅広く平坦状としてあり、その側端部に側壁を立設してあるため、これを水路に配設すると、幅の広い底板の前部から入る水流は、側壁によって次第に幅寄せされて筒状部に到達する。
　仮に水深が筒状部の高さの半分の浅い場合においても、底板の前部の幅が、例えば筒状部の幅の２倍あれば、筒状部に入る水流は満杯の状態となり、かつ加圧されるので、水路の流速よりも加速される。
　筒状部が長い場合には、筒状部の内周面との摩擦抵抗が大となるが、筒状部の長さが短いので、短時間で通過し、ダクトの後部に配設されるロータブレードに均等な水圧を与えることができる。 In the invention described in the above (1), the bottom plate front portion of the cylindrical portion is gradually widened forward, and a side wall is erected on the side end portion thereof. The water flow entering from the front of the wide bottom plate is gradually brought closer by the side wall to reach the cylindrical portion.
Even if the water depth is shallow at half the height of the cylindrical part, if the width of the front part of the bottom plate is, for example, twice the width of the cylindrical part, the water flow entering the cylindrical part becomes full, and Since it is pressurized, it is accelerated more than the flow velocity of the water channel.
When the cylindrical part is long, the frictional resistance with the inner peripheral surface of the cylindrical part becomes large, but the length of the cylindrical part is short, so that it passes in a short time and is arranged at the rear part of the duct. An equal water pressure can be applied to the rotor blade.
　前記（2）に記載の発明においては、底板の前端部分の幅は、筒状部の幅より大きく、例えば１．５倍より大とされているので、水路における流量の、例えば１．５倍量の水流を筒状部に導くことができる。 In the invention described in (2) above, the width of the front end portion of the bottom plate is larger than the width of the cylindrical portion, for example, more than 1.5 times, and thus, for example, 1.5 times the flow rate in the water channel. An amount of water flow can be directed to the tube.
　前記（３）に記載の発明においては、底板の一側端は、筒状部と平行であり、同じく他側は、先端にかけて外側方向へ突出しているので、筒状部と平行な側部を、例えば水路の側壁に近接させて配設すると、他側の前端から水流を幅寄せして、筒状部に水流を集めることができる。 In the invention described in (3) above, one side end of the bottom plate is parallel to the cylindrical part, and the other side projects outwardly toward the tip, so the side part parallel to the cylindrical part is For example, if the water flow is disposed close to the side wall of the water channel, the water flow can be gathered from the front end on the other side to collect the water flow in the tubular portion.
　前記（４）に記載の発明においては、底板の側端部は、左右対称に形成されているので、左右の側壁に沿ってダクト後部の中央部へ水を集合させることができる。 In the invention described in (4), since the side end portions of the bottom plate are formed symmetrically, water can be gathered to the central portion of the rear portion of the duct along the left and right side walls.
　前記（５）に記載の発明においては、側壁の先端部が、筒状部の外面よりも外側へ突出しているものについては、その内側面の中間部を内方へ膨出状に湾曲させ、かつ先端部の高さが筒状部の高さよりも高く設定されているので、側壁の内側面に沿う水流を持ち上げつつ、コアンダ効果によって高速化して筒状部を通過させることができる。 In the invention described in (5) above, when the tip portion of the side wall protrudes outward from the outer surface of the cylindrical portion, the intermediate portion of the inner side surface is curved inwardly bulging, And since the height of the front-end | tip part is set higher than the height of a cylindrical part, speeding up by the Coanda effect can be made to pass through a cylindrical part, raising the water flow along the inner surface of a side wall.
　前記（６）に記載の発明においては、前記側壁の上部先端が、筒状部の高さよりも高いものにおいては、側壁の先端部分から、筒状部先端の中央部へかけて、屋根の庇状に被蓋部が形成されているので、側壁の内側面に沿って、競り上りながら通過する水流は、被蓋部に沿って内方下流に降下し、筒状部へ通過する。 In the invention described in (6) above, when the upper end of the side wall is higher than the height of the tubular part, the roof wall extends from the end part of the side wall to the central part of the end of the tubular part. Since the cover portion is formed in a shape, the water flow passing along the inner surface of the side wall descends inward and downstream along the cover portion and passes to the cylindrical portion.
　前記（７）に記載の発明においては、底板の先端部には、前下方向へ傾斜する軟質の導水板が配設されているので、導水板の先端は、水圧により水路の底面に密接し、かつ、底層流をダクト内に導くことができる。 In the invention described in (7) above, since the soft water guide plate that inclines forward and downward is disposed at the tip of the bottom plate, the tip of the water guide plate is brought into close contact with the bottom surface of the water channel by water pressure. In addition, the bottom layer flow can be guided into the duct.
　前記（8）に記載の発明においては、筒状部の後端部の周面には、外向きフランジが形成されているので、その後部に水力発電ユニットなどを、フランジ結合により連結することができる。 In the invention described in (8), since the outward flange is formed on the peripheral surface of the rear end portion of the cylindrical portion, it is possible to connect a hydroelectric power generation unit or the like to the rear portion by flange coupling. it can.
　前記（９）に記載の発明においては、筒状部と、これに連続する底板部分を、連結可能に左右に分割状としてあるので、大形であっても製造が容易であり、かつ現場で組立てることができるので、搬送、作業性に優れている。 In the invention described in (9), since the cylindrical portion and the bottom plate portion continuous with the cylindrical portion are divided into left and right parts so as to be connectable, even a large size is easy to manufacture, and on site Since it can be assembled, it is excellent in transportation and workability.
　前記（10）に記載の発明においては、側板が弾力性のある材質で形成されているので、水路に設置する時に、側壁に衝突したり、あるいは大な流下物が衝突しても破損しにくい。
　また弾力性があるので、側壁面に密着して水漏れが生じず、ダクトにかかる水圧の低下を抑止することができる。 In the invention described in (10), since the side plate is made of an elastic material, when installed in a water channel, it is not easily damaged even if it collides with a side wall or a large falling material collides. .
Moreover, since it has elasticity, it adheres to a side wall surface, water leakage does not arise, and the fall of the water pressure concerning a duct can be suppressed.
本発明の加速ダクトの一実施形態を示す平面図である。It is a top view which shows one Embodiment of the acceleration duct of this invention. 図１におけるII－II線縦断側面図である。It is the II-II line vertical side view in FIG. 図１における正面図である。It is a front view in FIG. 図１における後面図である。FIG. 2 is a rear view in FIG. 1. 本発明の加速ダクトの使用状態を示す側面図である。It is a side view which shows the use condition of the acceleration duct of this invention. 本発明の加速ダクトの他の実施形態を示す平面図である。It is a top view which shows other embodiment of the acceleration duct of this invention. 図６におけるVII－VII線縦断側面図である。FIG. 7 is a longitudinal sectional side view taken along line VII-VII in FIG. 6. 図６における正面図である。It is a front view in FIG. 図６における後面図である。FIG. 7 is a rear view in FIG. 6.
　本発明の一実施形態を、図面を参照して説明する。
　図１において、加速ダクト１は、筒状部２の底板３前部が、平面視で前方に長く延出し、かつ図１における右側視において、右側外方向へ突出して右側面は大きく湾曲している。 An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, an acceleration duct 1 has a front portion of a bottom plate 3 of a cylindrical portion 2 that extends forward in plan view, and projects rightward in a right view in FIG. Yes.
　図１において、右側視における左側面は、筒状部２と直線状となっている。底板３の左右側端には、それぞれ側壁４、５が立設されている。
　右側の側壁４は、筒状部２の前端から側壁４の前端へかけて、次第に高くなるように立ちあがり、その上面は湾曲面となっている。
　左側の側壁５は、筒状部２の高さと、ほぼ同じ高さとされて直状となっている。これにより、この左側の側壁５を水路の側壁に接して、ロープ等により固定させる。 In FIG. 1, the left side surface when viewed from the right side is linear with the cylindrical portion 2. Side walls 4 and 5 are erected on left and right ends of the bottom plate 3, respectively.
The right side wall 4 rises gradually from the front end of the cylindrical portion 2 to the front end of the side wall 4, and its upper surface is a curved surface.
The left side wall 5 is substantially the same height as the cylindrical portion 2 and has a straight shape. Thus, the left side wall 5 is brought into contact with the side wall of the water channel and is fixed by a rope or the like.
　各側壁４、５の上面から、内向きの庇状の被蓋部６、７が一定の幅で、前端から筒状部２の前端へかけて延設され、側壁４、５と被蓋部６、７との境界は、弧曲面とされている。 From the upper surface of each side wall 4, 5, the inwardly hooked lid parts 6, 7 have a constant width and extend from the front end to the front end of the cylindrical part 2, and the side walls 4, 5 and the lid part The boundary with 6 and 7 is an arc curved surface.
　従って、側壁４、５に沿って競り上った水流は、円滑に被蓋部６、７の下面に沿って下流に通過する。側板４、５の材質を弾力性のある材質とすることによって、水路Ｒにダクト１を配設した時に、側壁に衝突し、あるいは流下物が衝突しても、破損するおそれがない。 Therefore, the water flow that competes along the side walls 4 and 5 smoothly passes downstream along the lower surfaces of the covered portions 6 and 7. By making the material of the side plates 4 and 5 elastic, there is no possibility of damage even if the duct 1 collides with the side wall or the falling material collides when the duct 1 is disposed in the water channel R.
　底板３の下面前部には、高さ調節可能として左右の支脚８，８が配設されている。また底板３の前端には、前部を水路Ｒの底に接するように、下向きに傾斜する導水板９が配設されている。導水板９は、前端下面が水路の底に密接しうるように、合成ゴム等の弾力性のある材質からなっている。 The left and right support legs 8, 8 are arranged on the front surface of the bottom surface of the bottom plate 3 so that the height can be adjusted. A water guide plate 9 that is inclined downward is disposed at the front end of the bottom plate 3 so that the front portion is in contact with the bottom of the water channel R. The water guide plate 9 is made of an elastic material such as synthetic rubber so that the lower surface of the front end can be in close contact with the bottom of the water channel.
　図５は、前記加速ダクト１を、水路において使用する状態を示す側面図である。
図５に示すように、加速ダクト１の筒状部２の後端周面に、外向フランジ１０が形成されている。この外向フランジ１０は、図５に示すように、水力発電ユニット１１の支持環体１２の、外向フランジ１３と連結される。 FIG. 5 is a side view showing a state where the acceleration duct 1 is used in a water channel.
As shown in FIG. 5, an outward flange 10 is formed on the rear end peripheral surface of the cylindrical portion 2 of the acceleration duct 1. As shown in FIG. 5, the outward flange 10 is connected to the outward flange 13 of the support ring 12 of the hydroelectric power generation unit 11.
　水力発電ユニット１１は、支持環体１２の上部に突出させた吊管１４を、水路Ｒの両岸間に架設した吊枠１５に吊設してあり、吊管１４の上端は、発電機１６に連結されている。吊管１４の下端部には軸受筐体１７が固定されている。
　軸受筐体１７に、水平に支持されたロータ軸の先端に、ロータ１８が固定されている。ロータ軸は、吊管１４内の図示しない伝動軸を介して、発電機１６に連結されている。 In the hydroelectric power generation unit 11, a suspension pipe 14 that protrudes from the upper portion of the support ring 12 is suspended from a suspension frame 15 that is installed between both banks of the water channel R. The upper end of the suspension pipe 14 is connected to the generator 16. It is connected to. A bearing housing 17 is fixed to the lower end portion of the suspension tube 14.
A rotor 18 is fixed to the tip of the rotor shaft that is horizontally supported by the bearing housing 17. The rotor shaft is connected to the generator 16 via a transmission shaft (not shown) in the suspension pipe 14.
　図５において、支持環体１２の後部の外向フランジ１３Ａは、後部に連結される排水ダクト１９の、前部の外向フランジ２０と連結される。
　排水ダクト１９は、前口１９Ｂよりも後口１９Ａを大径としてある。これによって、ロータ１８の部分は隘路となり、ロータ１８の回転効率が高められる。 In FIG. 5, the rearward outward flange 13 </ b> A of the support ring 12 is connected to the frontward outward flange 20 of the drainage duct 19 connected to the rear part.
The drainage duct 19 has a larger diameter at the rear port 19A than at the front port 19B. Thereby, the portion of the rotor 18 becomes a bottleneck, and the rotational efficiency of the rotor 18 is enhanced.
　図５において、水路Ｒの水位Ｗが低い場合においても、加速ダクト１の底板３前部に、導水板９から導かれる水流は、図１に示すように、側壁４によって、中央部へ幅寄せさせられる。
　側壁４の内側面は、その中間部分が内方向へ膨出しているので、コアンダ効果によって、側壁４内側面に沿って通過する水の流速が高速化される。 In FIG. 5, even when the water level W of the water channel R is low, the water flow guided from the water guide plate 9 to the front portion of the bottom plate 3 of the acceleration duct 1 is shifted toward the center by the side wall 4 as shown in FIG. Be made.
Since the middle part of the inner side surface of the side wall 4 bulges inward, the flow rate of water passing along the inner side surface of the side wall 4 is increased by the Coanda effect.
　底板３の中央へ寄せられる水流は、水位を上げながら筒状部２へ進み、筒状部２の筒内一杯に満ちて通過し、直後のロータ１８に均一な水圧をかけて、これを回転させる。筒状部２の直前で、余分の水は筒状部２の上面に溢れて通過する。 The water flow brought to the center of the bottom plate 3 advances to the cylindrical part 2 while raising the water level, passes through the cylinder part 2 in full, and applies a uniform water pressure to the rotor 18 immediately after it to rotate it. Let Just before the tubular portion 2, excess water overflows and passes over the upper surface of the tubular portion 2.
　排水ダクト１９は、後口１９Ａが、前口１９Ｂよりも大きく形成されているので、ロータ１８の収まっている支持環体１２の内部は隘路となり、水流の通過速度が高速となる。 In the drainage duct 19, the rear opening 19 </ b> A is formed larger than the front opening 19 </ b> B, so that the inside of the support ring 12 in which the rotor 18 is accommodated becomes a bottleneck, and the passage speed of the water flow becomes high.
　また排水ダクト１９は、後口１９Ａが大きいため、支持環体１２の内部にかかる水圧よりも、排水ダクト１９の後部は負圧となり、前部の水流を、水圧の差によって、高速流となって通過させ、ロータ１８の回転効率を高めることができる。 Further, since the drain duct 19 has a large rear opening 19A, the rear portion of the drain duct 19 has a negative pressure rather than the water pressure applied to the inside of the support ring 12, and the front water flow becomes a high-speed flow due to the difference in water pressure. And the rotational efficiency of the rotor 18 can be increased.
　更に、用水路Ｒの底面は勾配があり、加速ダクト１は、前部を支柱８により高く持上げているので、内部を通過する水流は、重力が後方へかかり、水路Ｒの水流よりも流速が早くなる。 Further, the bottom surface of the irrigation channel R has a slope, and the acceleration duct 1 has the front portion lifted higher by the support column 8, so that the water flow passing through the inside is subjected to gravity and the flow velocity is faster than the water flow in the water channel R. Become.
　図６は、加速ダクトの別の実施例を示す平面図である。前例と同じ部材には同じ符号を付して説明を省略する。
　図６において、加速ダクト１は、平面視で、幅の中央から左右が２っ割となり、左右の結合部１Ｃ、１Ｃを合わせて、ボルト１Ｄにより結合させる。 FIG. 6 is a plan view showing another embodiment of the acceleration duct. The same members as those of the previous example are denoted by the same reference numerals and description thereof is omitted.
In FIG. 6, the acceleration duct 1 is divided into two parts from the center of the width in plan view, and the right and left coupling parts 1 </ b> C and 1 </ b> C are joined together by bolts 1 </ b> D.
　この加速ダクト１の左右の側壁４、５は、左右対称に形成されている。これによって、大形のダクトも、金型で容易に製造することができる。また現場へ搬送して、現場で組立てることができるので、運搬及び作業性に優れている。
　なお、底板の前部の下面に、重錘を着脱可能に固定することによって、浮上がりを抑止する。 The left and right side walls 4 and 5 of the acceleration duct 1 are formed symmetrically. Thereby, a large-sized duct can also be easily manufactured with a metal mold. Moreover, since it can be transported to the site and assembled on site, it is excellent in transportation and workability.
In addition, lifting is suppressed by fixing a weight to the lower surface of the front part of a baseplate so that attachment or detachment is possible.
　水流を多量に集めることができるので、水位の低い水路などにおける水力発電装置に有効に利用することができる。 Since a large amount of water flow can be collected, it can be effectively used for a hydroelectric power generation device in a waterway with a low water level.
１．加速ダクト
２．筒状部
３．底板
４、５．側壁
６、７．被蓋部
８．支脚
９．導水板
１０．外向フランジ
１１．水力発電ユニット
１２．支持環体
１３、１３Ａ．外向フランジ
１４．吊管
１５．吊枠体
１６．発電機
１７．軸支持筐体
１８．ロータ
１９．排出ダクト
１９Ｂ．前口
１９Ａ．後口
２０．外向フランジ
Ｒ．水路
Ｗ‥水面 1. Acceleration duct 2. 2. Cylindrical part Bottom plate 4,5. Side walls 6,7. Covered portion 8. Support legs 9. Water guide plate 10. Outward flange 11. Hydroelectric power generation unit 12. Support ring 13, 13A. Outward flange 14. Hanging tube 15. Hanging frame 16. Generator 17. Shaft support housing 18. Rotor 19. Exhaust duct 19B. Front entrance 19A. Rear mouth 20. Outward flange Waterway W ... water surface

Claims (10)

  1. 　後部における筒状部の底板前部を、前方へ次第に広幅となる平坦状として延伸し、その側端部に側壁を立設し、かつその上部を解放としてなることを特徴とする加速ダクト。 Accelerating duct characterized in that the bottom plate front part of the cylindrical part at the rear part is extended in a flat shape that gradually becomes wider forward, a side wall is erected on the side end part, and the upper part is opened.
  2. 　底板の前端部分の幅は、筒状部の幅より大としてあることを特徴とする請求項１に記載の加速ダクト。 2. The acceleration duct according to claim 1, wherein the width of the front end portion of the bottom plate is larger than the width of the cylindrical portion.
  3. 　底板の側端部の一側は、筒状部と平行であり、同じく他側は、先端にかけて外方向へ突出していることを特徴とする請求項１または２に記載の加速ダクト。 The acceleration duct according to claim 1 or 2, wherein one side end portion of the bottom plate is parallel to the cylindrical portion, and the other side protrudes outward from the tip end.
  4. 　底板の側端部は、左右対称に形成されていることを特徴とする請求項１または２に記載の加速ダクト。 The acceleration duct according to claim 1 or 2, wherein the side edges of the bottom plate are formed symmetrically.
  5. 　側壁の先端部が、筒状部の外面よりも外側へ突出しているものにおいては、その内側面の中間部を内方へ膨出状に湾曲させ、かつ先端部の高さが筒状部の高さよりも高く設定されていることを特徴とする請求項１～４のいずれかに記載の加速ダクト。 In the case where the tip of the side wall protrudes outward from the outer surface of the cylindrical part, the middle part of the inner side is curved so as to bulge inward, and the height of the tip part is the height of the cylindrical part. The acceleration duct according to any one of claims 1 to 4, wherein the acceleration duct is set higher than a height.
  6. 　側壁の先端部上部が、筒状部の高さよりも高いものにおいては、側壁の先端部分から、筒状部先端の中央部へかけて庇状の被蓋部が形成されていることを特徴とする請求項１～５のいずれかに記載の加速ダクト。 Where the top end of the side wall is higher than the height of the cylindrical part, a bowl-shaped lid is formed from the front end part of the side wall to the center part of the front end of the cylindrical part. The acceleration duct according to any one of claims 1 to 5.
  7. 　底板の先端部には、前下方向へ傾斜する弾力性のある導水板が配設されていることを特徴とする請求項１～６のいずれかに記載の加速ダクト。 The acceleration duct according to any one of claims 1 to 6, wherein a resilient water guide plate that is inclined forward and downward is disposed at a tip portion of the bottom plate.
  8. 　筒状部の後端部の周面には、他の管体と結合させるための外向フランジが形成されていることを特徴とする請求項１～７のいずれかに記載の加速ダクト。 The acceleration duct according to any one of claims 1 to 7, wherein an outward flange for coupling with another tubular body is formed on a peripheral surface of a rear end portion of the cylindrical portion.
  9. 　筒状部とこれに連続する底板部分を、連結可能に左右に分割状としてあることを特徴とする請求項１～８のいずれかに記載の加速ダクト。 The acceleration duct according to any one of claims 1 to 8, wherein the cylindrical portion and the bottom plate portion continuing to the cylindrical portion are divided into left and right parts so as to be connectable.
  10. 　側板が弾力性のある材質で形成されることを特徴とする請求項１～９のいずれかに記載の加速ダクト。 The acceleration duct according to any one of claims 1 to 9, wherein the side plate is made of an elastic material.
PCT/JP2017/042464 2016-12-06 2017-11-27 Acceleration duct WO2018105429A1 (en)

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