JP2020153346A - Water turbine blade fitting structure of hydraulic generating apparatus and hydraulic generating apparatus - Google Patents

Water turbine blade fitting structure of hydraulic generating apparatus and hydraulic generating apparatus Download PDF

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JP2020153346A
JP2020153346A JP2019054824A JP2019054824A JP2020153346A JP 2020153346 A JP2020153346 A JP 2020153346A JP 2019054824 A JP2019054824 A JP 2019054824A JP 2019054824 A JP2019054824 A JP 2019054824A JP 2020153346 A JP2020153346 A JP 2020153346A
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hub
water
water turbine
turbine
hydroelectric power
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知美 後藤
Tomomi Goto
知美 後藤
近藤　博光
Hiromitsu Kondo
博光 近藤
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NTN Corp
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NTN Toyo Bearing Co Ltd
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Priority to JP2019054824A priority Critical patent/JP2020153346A/en
Priority to PCT/JP2019/032318 priority patent/WO2020040098A1/en
Priority to CN201980054974.9A priority patent/CN112639282B/en
Priority to KR1020217005806A priority patent/KR20210044798A/en
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    • 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
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    • Y02E10/00—Energy generation through renewable energy sources
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Abstract

To provide a water turbine blade fitting structure capable of preventing deterioration of strength caused by creep deformation or fretting wear of a hub of water turbine blades when the water turbine blades made of a fiber-reinforced plastic material receive variable load from flowing water.SOLUTION: A hydraulic generating apparatus includes water turbine blades 1 made of a fiber-reinforced plastic material and an electric generator that generates power by receiving rotation of the water turbine blades. A water turbine shaft 20 is inserted into a through-hole 50 of the water turbine blades 1. A pair of flange members 51 and 52 are disposed on both side faces of a hub 10 of the water turbine blades 1. The hub 10 and the flange member 51 and 52 are fastened together by a bolt 53. The flange members 51 and 52 are fitted to the water turbine shaft 20. The pair of flange members 51 and 52 have the same thickness of the bolt 53 in the length direction, and the same area of contact with the hub 10.SELECTED DRAWING: Figure 3

Description

この発明は、繊維強化プラスチック材からなる水車翼を備え、水路に設置されて水の力で発電する水力発電装置の水車翼取付け構造、および水力発電装置に関する。 The present invention relates to a water turbine wing mounting structure of a hydroelectric power generator which is provided with a water turbine wing made of a fiber reinforced plastic material and is installed in a water channel to generate electricity by the power of water, and a hydroelectric power generation device.

水力発電装置は、水のエネルギーを回転エネルギーに変換する水車翼と、回転エネルギーを電気エネルギーに変換する発電機とを備える。他に、必要に応じて、水車翼の回転を増速して発電機に伝達する増速機、発電機を制御する制御装置等が設けられる。 A hydroelectric power generator includes a turbine blade that converts water energy into rotational energy and a generator that converts rotational energy into electrical energy. In addition, if necessary, a speed increaser that accelerates the rotation of the turbine blades and transmits the rotation to the generator, a control device that controls the generator, and the like are provided.

小出力の水力発電装置の水車翼を繊維強化プラスチック材とし、増速機の入力軸となる水車軸に取り付ける場合、従来、図１０に示す水車翼取付け構造が採用されていた。この水車翼取付け構造は、まず、一対のフランジ部材５１，５２で水車翼１のハブ１０の両側面を挟み込み、これら一対のフランジ部材５１，５２とハブ１０とをボルト５３で締め付けて固定する。そして、この水車翼１と一対のフランジ部材５１，５２とからなるアッセンブリを、フランジ部材５１，５２の部分で水車軸２０に軸方向に移動不能かつ回転不能に取り付ける。水車翼１が水の力を受けて回転すると、その回転トルクが摩擦力によりフランジ部材５１，５２に伝達されて、水車軸２０が回転する。 When the turbine blade of a low-power hydroelectric power generator is made of a fiber-reinforced plastic material and attached to the turbine shaft which is the input shaft of the speed increaser, the turbine blade attachment structure shown in FIG. 10 has been conventionally adopted. In this water turbine blade mounting structure, first, both side surfaces of the hub 10 of the water turbine blade 1 are sandwiched between a pair of flange members 51 and 52, and the pair of flange members 51 and 52 and the hub 10 are fastened and fixed with bolts 53. Then, an assembly composed of the turbine blade 1 and the pair of flange members 51 and 52 is attached to the turbine shaft 20 at the flange members 51 and 52 so as not to be movable and non-rotatable in the axial direction. When the turbine blade 1 rotates under the force of water, the rotational torque is transmitted to the flange members 51 and 52 by frictional force, and the turbine shaft 20 rotates.

特許文献１は垂直軸型水力発電装置に関し、垂直回転軸と３枚のブレードとをボルトおよびナットを用いて締結固定することが記載されている。 Patent Document 1 describes a vertical axis type hydroelectric power generation device in which a vertical rotating shaft and three blades are fastened and fixed using bolts and nuts.

特開２０１７−８９２７号公報JP-A-2017-8927

水路に設置される水力発電装置では、水車翼が流水から様々な変動荷重を受ける。例えば、流水の流速変化による変動荷重を受ける。また、水車翼が、回転軸心が水流方向と平行なプロペラ水車である場合、水路の水位低下により水車翼の上部が水面より上に出た状態となると、水車翼の回転に伴って、水車翼の放射状に延びる羽根が水に没している状態と水から出ている状態とを繰り返すことにより、大きな交番荷重を受ける。 In hydroelectric power generators installed in waterways, the turbine blades receive various variable loads from running water. For example, it receives a fluctuating load due to a change in the flow velocity of running water. Further, when the turbine blade is a propeller turbine whose rotation axis is parallel to the water flow direction, when the upper part of the turbine blade comes out above the water surface due to a decrease in the water level of the water channel, the turbine blade is rotated. A large alternating load is received by repeating the state in which the radial blades of the wing are submerged in water and the state in which they are out of water.

なお、水路の水位低下は、降水量が少ない場合や、灌漑のために水路の水が使用される場合に起きる。また、梅雨時期、台風等で集中豪雨が予想される場合に、水路からの溢水を避けるために、水路の流量を制限することもある。 The water level of the canal drops when the amount of precipitation is low or when the water in the canal is used for irrigation. In addition, when torrential rain is expected due to the rainy season, typhoons, etc., the flow rate of the canal may be restricted in order to avoid flooding from the canal.

図１０に示すように、水車翼１が変動荷重Ｆ１を受けると、羽根が荷重方向に撓み、その撓みが羽根の根元部からハブ１０に伝わる。すると、両側をフランジ部材５１，５２に挟まれたハブ１０が、両フランジ部材５１，５２から圧縮力Ｆ２を継続的に受ける。これにより、ハブ１０がクリープ変形して軸方向幅が狭くなり、水車翼１とフランジ部材５１，５２とを締結しているボルト５３が緩み、その締付力が低下する。 As shown in FIG. 10, when the turbine blade 1 receives the fluctuating load F1, the blades bend in the load direction, and the bending is transmitted from the root portion of the blades to the hub 10. Then, the hub 10 sandwiched between the flange members 51 and 52 on both sides continuously receives the compressive force F2 from both the flange members 51 and 52. As a result, the hub 10 is creep-deformed and the axial width is narrowed, the bolt 53 that fastens the turbine blade 1 and the flange members 51 and 52 is loosened, and the tightening force thereof is reduced.

また、交番荷重により、ハブ１０とフランジ部材５１，５２との間に隙間ができたり、その隙間が閉じたりすることで、ハブ１０におけるフランジ部材５１，５２との接触面にフレッティング摩耗等を起こすことがある。繊維強化プラスチック材の樹脂材、例えばビニルエステル樹脂は、不飽和ポリエステル樹脂と比較して、耐水性に優れ、水との接触でも強度劣化し難い。一方、繊維強化プラスチック材の繊維材は、水との接触により強度劣化に繋がる。水車翼の外皮は樹脂材であるため、水と接触しても強度低下が促進されないが、ハブ１０にフレッティング摩耗等が発生すると、その部分から水車翼の繊維材が水と接触し、水車翼１の強度低下に繋がる。 Further, due to the alternating load, a gap is created between the hub 10 and the flange members 51 and 52, and the gap is closed, so that fretting wear and the like are caused on the contact surface of the hub 10 with the flange members 51 and 52. May wake up. A resin material of a fiber reinforced plastic material, for example, a vinyl ester resin, has excellent water resistance as compared with an unsaturated polyester resin, and its strength is less likely to deteriorate even when in contact with water. On the other hand, the fiber material of the fiber reinforced plastic material leads to the deterioration of strength due to the contact with water. Since the outer skin of the water turbine blade is a resin material, the decrease in strength is not promoted even if it comes into contact with water. However, when fretting wear or the like occurs on the hub 10, the fiber material of the water turbine blade comes into contact with water from that portion, and the water turbine. This leads to a decrease in the strength of the wing 1.

水車翼１を金属材にすれば、上記ハブ１０のクリープ変形を防止することができる。しかし、繊維強化プラスチック材を用いた場合と同等の強度を金属材で確保しようとすると、水車翼１の重量が大きくなる。そのため、水車軸２０を支持するギヤの剛性を高める必要があり、コスト高となる。 If the water turbine blade 1 is made of a metal material, creep deformation of the hub 10 can be prevented. However, if it is attempted to secure the same strength as the case where the fiber reinforced plastic material is used with the metal material, the weight of the water turbine blade 1 becomes large. Therefore, it is necessary to increase the rigidity of the gear that supports the water axle 20, which increases the cost.

また、水車翼１を比較的軽量なアルミ材とすることも考えられる。しかし、水車軸２０や増速機には主に鋼材が使用されているため、水車翼１がアルミ材であると、異種金属であるアルミ材と鋼材とが水に浸かることとなり、電食が発生する可能性がある。このため、アルミ材の適用は難しい。 It is also conceivable that the turbine blade 1 is made of a relatively lightweight aluminum material. However, since steel is mainly used for the water axle 20 and the speed increaser, if the water turbine blade 1 is made of aluminum, the dissimilar metals aluminum and steel will be immersed in water, resulting in electrolytic corrosion. It can occur. Therefore, it is difficult to apply aluminum material.

この発明の目的は、繊維強化プラスチック材で作られた水車翼が流水からの変動荷重を受けることにより、水車翼のハブがクリープ変形やフレッティング摩耗して起きる強度低下を防止することができる水力発電装置の水車翼取付け構造、および水力発電装置を提供することである。 An object of the present invention is a hydraulic force capable of preventing a decrease in strength caused by creep deformation or fretting wear of a hub of a turbine blade due to a variable load from running water of a turbine blade made of a fiber reinforced plastic material. It is to provide a turbine blade mounting structure of a power generation device and a hydroelectric power generation device.

この発明の水力発電装置の水車翼取付け構造は、繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置における、前記水車翼を水車軸に対して一体回転するように取り付ける水車翼取付け構造であって、
前記水車翼は中心部に中実のハブを有し、このハブに設けられた貫通孔に前記水車軸が挿通され、
前記ハブの両側面に一対のフランジ部材が配置され、前記ハブおよび前記一対のフランジ部材に設けられたボルト孔にわたってボルトが挿通され、このボルトにより前記ハブと前記一対のフランジ部材とが締結され、
前記一対のフランジ部材が前記水車軸に取り付けられ、
前記一対のフランジ部材は、前記ボルトの長さ方向の厚さが互いに同じで、かつ前記ハブとの接触面積が互いに同じである。
この場合、ハブが両側のフランジ部材から受ける圧縮力の大きさをほぼ同じにすることができるため、ハブと各フランジ部材との間に均等な摩擦力が作用し、バランスが良い。 The water turbine wing mounting structure of the hydroelectric power generation device of the present invention is a hydroelectric power generation device including a water turbine wing made of a fiber-reinforced plastic material and a generator that generates power by receiving rotation of the water turbine wing. It is a water turbine wing mounting structure that mounts so that it rotates integrally with the axle.
The turbine blade has a solid hub in the center, and the turbine shaft is inserted through a through hole provided in the hub.
A pair of flange members are arranged on both side surfaces of the hub, bolts are inserted through the bolt holes provided in the hub and the pair of flange members, and the hub and the pair of flange members are fastened by the bolts.
The pair of flange members are attached to the water axle and
The pair of flange members have the same thickness of the bolts in the length direction and the same contact area with the hub.
In this case, since the magnitude of the compressive force received by the hub from the flange members on both sides can be made substantially the same, an equal frictional force acts between the hub and each flange member, and the balance is good.

この発明において、前記フランジ部材における前記ハブとの接触面の縁に面取り部が設けられているのが好ましい。
上記面取り部が設けられていると、エッジロードが軽減され、フレッティング摩耗の発生を防止することができる。 In the present invention, it is preferable that a chamfered portion is provided on the edge of the contact surface of the flange member with the hub.
When the chamfered portion is provided, the edge load is reduced and the occurrence of fretting wear can be prevented.

また、前記ハブの前記ボルト孔の内周面と前記ボルトの外周面との間に、前記ハブの軸方向幅よりも長さが短く、前記ボルトの締付けにより両端が前記一対のフランジ部材に当接する締付力保持部材が介在していると良い。 Further, the length between the inner peripheral surface of the bolt hole of the hub and the outer peripheral surface of the bolt is shorter than the axial width of the hub, and both ends hit the pair of flange members by tightening the bolt. It is preferable that a tightening force holding member in contact is interposed.

この構成によると、ハブと一対のフランジ部材とを締結するボルトを締め付けると、ハブが弾性変形してその軸方向幅が狭くなることにより、締付力保持部材の両端が一対のフランジ部材に当接する。この状態では、水車翼が変動荷重を受けて一対のフランジ部材から水車翼の中心部に対して圧縮力が作用した場合、その圧縮力を締付力保持部材が受けてハブには大きな圧縮力がかからないため、ハブがクリープ変形することが防止される。このように、ハブのクリープ変形を防止することで、ボルトの緩みを防いで、ハブとフランジ部材の締付力の低下を回避することができる。 According to this configuration, when the bolt that fastens the hub and the pair of flange members is tightened, the hub is elastically deformed and its axial width is narrowed, so that both ends of the tightening force holding member hit the pair of flange members. Get in touch. In this state, when the turbine blade receives a fluctuating load and a compressive force acts on the center of the turbine blade from a pair of flange members, the tightening force holding member receives the compressive force and a large compressive force is applied to the hub. Since it does not apply, the hub is prevented from creeping and deforming. By preventing the creep deformation of the hub in this way, it is possible to prevent the bolts from loosening and to avoid a decrease in the tightening force between the hub and the flange member.

また、ハブとフランジ部材の締付力が確保されているため、水車翼に交番荷重が作用しても、ハブとフランジ部材との間に隙間ができたり、その隙間が閉じたりすることがなく、ハブにおけるフランジ部材との接触面にフレッティング摩耗が起きない。そのため、水車翼の繊維強化プラスチック材の内部への水の浸透が抑制され、繊維強化プラスチック材の材料劣化による水車翼の強度低下を防止することができる。 In addition, since the tightening force between the hub and the flange member is secured, even if an alternating load is applied to the turbine blades, there is no gap between the hub and the flange member, and the gap does not close. , Fretting wear does not occur on the contact surface of the hub with the flange member. Therefore, the permeation of water into the fiber-reinforced plastic material of the water turbine blade is suppressed, and the strength of the water turbine blade can be prevented from being lowered due to the deterioration of the material of the fiber-reinforced plastic material.

この発明の水力発電装置の水車翼取付け構造は、前記水車翼が複数の羽根を有するプロペラ水車である場合に適する。特に、前記プロペラ水車である水車翼が、回転軸心が水流方向と平行である場合に適する。いずれの場合も、水車翼が大きな変動荷重を受けるため、この発明の水車翼取付け構造を採用することによる効果が大きい。 The turbine blade mounting structure of the hydroelectric power generation device of the present invention is suitable when the turbine blade is a propeller turbine having a plurality of blades. In particular, the turbine blade, which is the propeller turbine, is suitable when the center of rotation is parallel to the water flow direction. In either case, since the turbine blades receive a large fluctuating load, the effect of adopting the turbine blade mounting structure of the present invention is great.

この発明の水力発電装置は、繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置であって、請求項１ないし請求項５のいずれか１項に記載の水車翼取付け構造によって、前記水車翼が水車軸に対して一体回転するように取り付けられている。
この構成の水力発電装置によると、繊維強化プラスチック材で作られた水車翼が流水からの変動荷重を受けることにより、水車翼のハブがクリープ変形やフレッティング摩耗して起きる強度低下を防止することができて、水力発電装置の耐久性に優れ、保守の為に運転休止する時間が短縮でき、稼働率が向上する。 The hydroelectric power generation device of the present invention is a hydroelectric power generation device including a water turbine wing made of a fiber-reinforced plastic material and a generator that generates power in response to the rotation of the water turbine wing, according to claims 1 to 5. According to the water turbine blade mounting structure according to any one of the items, the water turbine blade is mounted so as to rotate integrally with the water turbine shaft.
According to the hydroelectric power generator with this configuration, the turbine blades made of fiber reinforced plastic material receive a fluctuating load from running water, which prevents the hub of the turbine blades from creep deformation and fretting wear, resulting in a decrease in strength. The durability of the hydroelectric power generation device is excellent, the time to suspend operation for maintenance can be shortened, and the operating rate is improved.

この発明の水力発電装置の水車翼取付け構造は、繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置における、前記水車翼を水車軸に対して一体回転するように取り付ける水車翼取付け構造であって、前記水車翼は中心部に中実のハブを有し、このハブに設けられた貫通孔に前記水車軸が挿通され、前記ハブの両側面に一対のフランジ部材が配置され、前記ハブおよび前記一対のフランジ部材に設けられたボルト孔にわたってボルトが挿通され、このボルトにより前記ハブと前記一対のフランジ部材とが締結され、前記一対のフランジ部材が前記水車軸に取り付けられ、前記一対のフランジ部材は、前記ボルトの長さ方向の厚さが互いに同じで、かつ前記ハブとの接触面積が互いに同じであるため、水車翼が流水からの変動荷重を受けることにより、水車翼のハブがクリープ変形やフレッティング摩耗して起きる強度低下を防止することができる。 The water turbine wing mounting structure of the hydroelectric power generation device of the present invention is in a hydroelectric power generation device including a water turbine wing made of a fiber-reinforced plastic material and a generator that generates power by receiving rotation of the water turbine wing. It is a turbine blade mounting structure that is mounted so as to rotate integrally with the axle. The turbine blade has a solid hub in the center, and the turbine shaft is inserted through a through hole provided in the hub. A pair of flange members are arranged on both side surfaces of the hub, bolts are inserted through the hub and bolt holes provided in the pair of flange members, and the hub and the pair of flange members are fastened by the bolts. Since the pair of flange members are attached to the turbine shaft, and the pair of flange members have the same thickness of the bolts in the length direction and the same contact area with the hub, the turbine blades have the same thickness. By receiving a fluctuating load from running water, it is possible to prevent a decrease in strength caused by creep deformation or fletting wear of the hub of the turbine blade.

この発明の水力発電装置は、繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置であって、この発明の車翼取付け構造によって、前記水車翼が水車軸に対して一体回転するように取り付けられているため、繊維強化プラスチック材で作られた水車翼が流水からの変動荷重を受けることにより、水車翼のハブがクリープ変形やフレッティング摩耗して起きる強度低下を防止することができて、水力発電装置の耐久性に優れ、保守の為に運転休止する時間が短縮でき、稼働率が向上する。 The hydroelectric power generator of the present invention is a hydroelectric power generator including a water turbine wing made of a fiber-reinforced plastic material and a generator that generates power by receiving the rotation of the water turbine wing, and is based on the wheel wing mounting structure of the present invention. Since the turbine wing is attached so as to rotate integrally with the turbine shaft, the hub of the turbine wing is creep-deformed due to the variable load from running water of the turbine wing made of fiber-reinforced plastic material. It is possible to prevent a decrease in strength caused by fretting wear, excellent durability of the hydroelectric power generator, shortening the time for suspension of operation for maintenance, and improving the operating rate.

この発明の第１の実施形態に係る水車翼取付け構造が適用された水力発電装置の正面図である。It is a front view of the hydroelectric power generation apparatus to which the water turbine blade mounting structure which concerns on 1st Embodiment of this invention is applied. 同水力発電装置の側面図である。It is a side view of the hydroelectric power generation device. 図２の主要部を示す側面図であり、一部を断面で表している。It is a side view which shows the main part of FIG. 2, and a part is shown in the cross section. 図３の部分拡大図である。It is a partially enlarged view of FIG. （Ａ）は図４のVIIＡ部拡大図、（Ｂ）は図４のVIIＢ部拡大図である。(A) is an enlarged view of the VIA part of FIG. 4, and (B) is an enlarged view of the VVII part of FIG. この発明の第２の実施形態に係る水車翼取付け構造を示す断面図である。It is sectional drawing which shows the water turbine blade mounting structure which concerns on 2nd Embodiment of this invention. 水車翼のハブと締付力保持部材の断面図である。It is sectional drawing of the hub of a water turbine blade and a tightening force holding member. この発明の第３の実施形態に係る水車翼取付け構造を示す断面図である。It is sectional drawing which shows the water turbine blade mounting structure which concerns on 3rd Embodiment of this invention. この発明の第４の実施形態に係る水車翼取付け構造を示す断面図である。It is sectional drawing which shows the water turbine blade mounting structure which concerns on 4th Embodiment of this invention. 従来の水車翼取付け構造を示す断面図である。It is sectional drawing which shows the conventional water turbine blade mounting structure.

［第１の実施形態］
＜水力発電装置＞
図１、図２は第１の実施形態に係る水車翼取付け構造が適用された水力発電装置の正面図および側面図である。この水力発電装置は、水路に設置されて水の力で発電を行うものであり、水車翼１、増速機２、発電機３、および支持装置４を備える。他に、発電機３を制御する制御装置（図示せず）等が設けられる。 [First Embodiment]
<Hydroelectric power generator>
1 and 2 are a front view and a side view of a hydroelectric power generation device to which the water turbine blade mounting structure according to the first embodiment is applied. This hydroelectric power generation device is installed in a water channel to generate power by the power of water, and includes a water turbine blade 1, a speed increaser 2, a generator 3, and a support device 4. In addition, a control device (not shown) for controlling the generator 3 and the like are provided.

水車翼１は、中心部に位置するハブ１０の外周から複数（例えば５つ）の羽根１１が放射状に延びるプロペラ水車であって、回転軸心Ｏが水路の水流の方向Ａと平行になるように設けられる。各羽根１１の先端部は、上流側に向けて傾斜している。ハブ１０と羽根１１とは一体に形成されている。上流側となるハブ１０の前面には、スピナ１２が取り付けられている。これらハブ１０、羽根１１、およびスピナ１２は、繊維強化プラスチック材で作られている。 The turbine blade 1 is a propeller turbine in which a plurality of (for example, five) blades 11 extend radially from the outer periphery of the hub 10 located at the center, so that the rotation axis O is parallel to the direction A of the water flow in the channel. It is provided in. The tip of each blade 11 is inclined toward the upstream side. The hub 10 and the blade 11 are integrally formed. A spinner 12 is attached to the front surface of the hub 10 on the upstream side. These hubs 10, blades 11, and spinners 12 are made of fiber reinforced plastic material.

増速機２は、水車翼１の回転を増速するものである。増速機２の入力軸となる水車軸２０が増速機２から上流側に突出しており、この水車軸２０に水車翼１が一体回転するように固定される。 The speed increaser 2 accelerates the rotation of the turbine blade 1. The water wheel shaft 20 serving as the input shaft of the speed increaser 2 projects upstream from the speed increaser 2, and the water wheel blade 1 is fixed to the water wheel shaft 20 so as to rotate integrally with the water wheel shaft 20.

図３に示すように、増速機２の増速機構２１は、互いに噛み合う一対の傘歯車２２，２３からなる。入力側の傘歯車２２は水車軸２０に取り付けられ、出力側の傘歯車２３は鉛直方向に延びる回転伝達軸２４に取り付けられている。回転伝達軸２４は、増速機２１で増速された回転力を発電機３に伝達する軸であり、支柱２５の内部に設けられている。図２に示すように、支柱２５は、上端が支持装置４に固定され、下端に増速機２が支持されている。 As shown in FIG. 3, the speed increasing mechanism 21 of the speed increasing machine 2 includes a pair of bevel gears 22 and 23 that mesh with each other. The bevel gear 22 on the input side is attached to the water wheel shaft 20, and the bevel gear 23 on the output side is attached to the rotation transmission shaft 24 extending in the vertical direction. The rotation transmission shaft 24 is a shaft that transmits the rotational force accelerated by the speed increaser 21 to the generator 3, and is provided inside the support column 25. As shown in FIG. 2, the upper end of the support column 25 is fixed to the support device 4, and the speed increaser 2 is supported at the lower end.

図２において、発電機３は下方に延びる発電機軸３０を有し、この発電機軸３０が回転連結具３１を介して前記回転伝達軸２４と連結されている。これにより、水車翼１の回転が増速機２により増速して発電機３に伝達されて、発電機３が発電する。発電機３は、例えば３相交流発電機である。 In FIG. 2, the generator 3 has a generator shaft 30 extending downward, and the generator shaft 30 is connected to the rotation transmission shaft 24 via a rotation connector 31. As a result, the rotation of the turbine blade 1 is accelerated by the speed increaser 2 and transmitted to the generator 3, and the generator 3 generates electricity. The generator 3 is, for example, a three-phase alternating current generator.

図１、図２に示すように、支持装置４は、水路の両側の側壁５の間に架け渡して設けられた２本の梁４０と、これら梁４０の上に載置された架台４１と、この架台４１に設置された２本の発電機スタンド４２と、これら２本の発電機スタンド４２の上部を繋ぐように設けられたベース板４３とを有する。発電機３は、架台４１とベース板４３との間に配置され、ベース板４３に固定される。 As shown in FIGS. 1 and 2, the support device 4 includes two beams 40 provided so as to be bridged between the side walls 5 on both sides of the water channel, and a stand 41 mounted on the beams 40. It has two generator stands 42 installed on the gantry 41 and a base plate 43 provided so as to connect the upper portions of these two generator stands 42. The generator 3 is arranged between the gantry 41 and the base plate 43, and is fixed to the base plate 43.

＜水車翼取付け構造＞
前記水車軸２０への前記水車翼１の取付け構造について説明する。
図３に示すように、水車軸２０は、増速機２よりも上流側（図３の左側）に突出した大径部２０ａと、この大径部２０ａの先端から上流側に延びる小径部２０ｂとを有し、小径部２０ｂの基端を除く外周面に雄ねじ２０ｃが形成されている。 <Water turbine wing mounting structure>
The attachment structure of the water turbine blade 1 to the water turbine shaft 20 will be described.
As shown in FIG. 3, the water axle 20 has a large diameter portion 20a protruding upstream (left side in FIG. 3) from the speed increaser 2 and a small diameter portion 20b extending upstream from the tip of the large diameter portion 20a. A male screw 20c is formed on the outer peripheral surface of the small diameter portion 20b excluding the base end.

水車翼１は、ハブ１０の上流側および下流側の両側面に、一対の環状のフランジ部材５１，５２がボルト５３により締付け固定されている。ハブ１０は、中央部に貫通孔５０を有する筒状で、中実に成形されている。
上流側のフランジ部材５１は、ハブ１０の貫通孔５０よりも内径が小さく、水車軸２０の小径部２０ｂに嵌合可能である。下流側のフランジ部材５２は、内周面が水車軸２０の大径部２０ａに嵌合可能で、かつ外周面がハブ１０の貫通孔５０に嵌合可能な筒状部５４を有する。 In the turbine blade 1, a pair of annular flange members 51 and 52 are tightened and fixed by bolts 53 on both upstream and downstream sides of the hub 10. The hub 10 has a tubular shape having a through hole 50 in the central portion, and is solidly molded.
The flange member 51 on the upstream side has an inner diameter smaller than that of the through hole 50 of the hub 10, and can be fitted into the small diameter portion 20b of the water axle 20. The flange member 52 on the downstream side has a tubular portion 54 whose inner peripheral surface can be fitted into the large diameter portion 20a of the water axle 20 and whose outer peripheral surface can be fitted into the through hole 50 of the hub 10.

図４に示すように、前記ボルト５３は、水車翼１のハブ１０および一対のフランジ部材５１，５２に軸方向にそれぞれ設けられたボルト孔１０ａ，５１ａ，５２ａにわたって挿通される。この実施形態の場合、下流側のフランジ部材５２のボルト孔５２ａがねじ孔となっており、上流側からボルト孔５１ａ，１０ａに挿入したボルト５３のねじ部５３ａをねじ孔であるボルト孔５２ａに螺合させることで、水車翼１と一対のフランジ部材５１，５２とが締結される。別の例として、下流側のフランジ部材５２のボルト孔５２ａねじ孔ではなく、ボルト孔５２ａを貫通させたボルト５３のねじ部５３ａにナット（図示せず）を螺着することで、水車翼１と一対のフランジ部材５１，５２とを締結してもよい。 As shown in FIG. 4, the bolt 53 is inserted through the bolt holes 10a, 51a, 52a provided in the hub 10 and the pair of flange members 51, 52 of the water turbine blade 1 in the axial direction, respectively. In the case of this embodiment, the bolt hole 52a of the flange member 52 on the downstream side is a screw hole, and the screw portion 53a of the bolt 53 inserted into the bolt holes 51a and 10a from the upstream side is made into the bolt hole 52a which is a screw hole. By screwing, the water wheel blade 1 and the pair of flange members 51 and 52 are fastened. As another example, the water turbine blade 1 is formed by screwing a nut (not shown) into the threaded portion 53a of the bolt 53 that penetrates the bolt hole 52a instead of the bolt hole 52a screw hole of the flange member 52 on the downstream side. And the pair of flange members 51 and 52 may be fastened to each other.

この水車翼取付け構造は、水車翼１のハブ１０に締結される一対のフランジ部材５１，５２が、前記ボルト５３の長さ方向の厚さ、つまり水車翼１の軸方向の厚さが互いに同じで、かつハブ１０との接触面積が互いに同じとされている。前記両フランジ部材５１，５２は、下流側のフランジ部材５２に設けられた筒状部５４よりも外径側の部分の全体が均一な厚さの平板状とされている。図示の例では、上流側のフランジ部材５１は、外径側端から内径側端の全体に渡って均一な厚さとされている。ただし、図５（Ａ），（Ｂ）に示すように、各フランジ部材５１，５２におけるハブ１０との接触面の縁に、断面円弧状の面取り部６１，６２が設けられている。面取り部６１，６２は、他の断面形状であってもよい。例えば、２次曲線等の曲線形状であってもよい。場合によっては、直線状に切り欠いた形状であってもよい。 In this turbine blade mounting structure, the pair of flange members 51, 52 fastened to the hub 10 of the turbine blade 1 have the same thickness in the length direction of the bolt 53, that is, the thickness in the axial direction of the turbine blade 1. And the contact area with the hub 10 is the same as each other. Both flange members 51 and 52 have a flat plate shape having a uniform thickness as a whole of a portion on the outer diameter side of the tubular portion 54 provided on the flange member 52 on the downstream side. In the illustrated example, the flange member 51 on the upstream side has a uniform thickness from the outer diameter side end to the entire inner diameter side end. However, as shown in FIGS. 5A and 5B, chamfered portions 61 and 62 having an arcuate cross section are provided on the edges of the contact surfaces of the flange members 51 and 52 with the hub 10. The chamfered portions 61 and 62 may have other cross-sectional shapes. For example, it may have a curved shape such as a quadratic curve. In some cases, the shape may be a linear cutout.

水車軸２０への水車翼１の取付方法について説明する。
まず、図４のようにハブ１０のボルト孔１０ａにハブ１０の両側面にフランジ部材５１，５２をボルト５３により締結してアッセンブリとする。このアッセンブリを、図３に示すように、ハブ１０の貫通孔５０に水車軸２０を挿通した状態で、水車軸２０に取り付ける。 A method of attaching the water turbine blade 1 to the water turbine shaft 20 will be described.
First, as shown in FIG. 4, flange members 51 and 52 are fastened to the bolt holes 10a of the hub 10 on both side surfaces of the hub 10 with bolts 53 to form an assembly. As shown in FIG. 3, this assembly is attached to the water axle 20 with the water axle 20 inserted through the through hole 50 of the hub 10.

具体的には、上流側のフランジ部材５１を水車軸２０の小径部２０ｂの基端に嵌合させ、かつ下流側のフランジ部材５２の筒状部５４を水車軸２０の大径部２０ａに嵌合させる。そして、上流側のフランジ部材５１を大径部２０ａと小径部２０ｂとの段面２０ｄに当接させ、小径部２０ｂの雄ねじ２０ｃに螺着したナット５６により、上流側のフランジ部材５１を水車軸２０に対し軸方向に移動不能に取り付ける。また、水車軸２０の大径部２０ａおよび下流側のフランジ部材５２の筒状部５４に設けられたキー溝にキー５７を係合させることで、下流側のフランジ部材５２を水車軸２０に回転不能に取り付ける。 Specifically, the flange member 51 on the upstream side is fitted to the base end of the small diameter portion 20b of the water axle 20, and the tubular portion 54 of the flange member 52 on the downstream side is fitted to the large diameter portion 20a of the water axle 20. Match. Then, the flange member 51 on the upstream side is brought into contact with the stepped surface 20d of the large diameter portion 20a and the small diameter portion 20b, and the flange member 51 on the upstream side is brought into contact with the male screw 20c of the small diameter portion 20b by the nut 56. It is attached so that it cannot move in the axial direction with respect to 20. Further, by engaging the key 57 with the key groove provided in the large diameter portion 20a of the water axle 20 and the tubular portion 54 of the flange member 52 on the downstream side, the flange member 52 on the downstream side is rotated to the water axle 20. Install impossible.

＜水車翼取付け構造の作用＞
このように、一対のフランジ部材５１，５２の軸方向厚さが互いに同じで、かつハブ１０との接触面積が互いに同じであると、ハブ１０が両側のフランジ部材５１，５２から受ける圧縮力の大きさをほぼ同じにすることができ、そのためハブ１０と各フランジ部材５１，５２との間に均等な摩擦力が作用し、バランスが良い。結果、変動荷重に対しても、フランジ部材５１，５２の片側が過大な圧縮力を受けることが無く、そのためクリープ変形し難い。また、フランジ部材５１，５２におけるハブ１０との接触面の縁に面取り部６１，６２が設けられていると、エッジロードが軽減され、フレッティング摩耗の発生を防止することができる。 <Action of turbine wing mounting structure>
As described above, when the pair of flange members 51 and 52 have the same axial thickness and the contact area with the hub 10 are the same, the compressive force received by the hub 10 from the flange members 51 and 52 on both sides is applied. The sizes can be made substantially the same, so that an even frictional force acts between the hub 10 and the flange members 51 and 52, resulting in a good balance. As a result, even with a fluctuating load, one side of the flange members 51 and 52 is not subjected to an excessive compressive force, and therefore creep deformation is difficult. Further, when the chamfered portions 61 and 62 are provided on the edge of the contact surface of the flange members 51 and 52 with the hub 10, the edge load can be reduced and the occurrence of fretting wear can be prevented.

［第２の実施形態］
図６は水車翼取付け構造の第２の実施形態を示す。ハブ１０のボルト孔１０ａはフランジ部材５１，５２のボルト孔５１ａ，５２ａよりも内径が大きく、ハブ１０のボルト孔１０ａの内周面とボルト５３の外周面との間に締付力保持部材５５が介在している。締付力保持部材５５は、水車翼１の繊維強化プラスチック材よりも硬度が高く、かつ水中で錆び難い材料、例えばステンレス（ＳＵＳ３０４）等の金属材からなる。この実施形態の締付力保持部材５５は、ボルト孔１０ａの内周に嵌合する円筒状である。 [Second Embodiment]
FIG. 6 shows a second embodiment of the turbine blade mounting structure. The bolt hole 10a of the hub 10 has a larger inner diameter than the bolt holes 51a and 52a of the flange members 51 and 52, and the tightening force holding member 55 is between the inner peripheral surface of the bolt hole 10a of the hub 10 and the outer peripheral surface of the bolt 53. Is intervening. The tightening force holding member 55 is made of a material having a higher hardness than the fiber-reinforced plastic material of the water turbine blade 1 and less likely to rust in water, for example, a metal material such as stainless steel (SUS304). The tightening force holding member 55 of this embodiment has a cylindrical shape that fits into the inner circumference of the bolt hole 10a.

図７に示すように、締付力保持部材５５の長さはハブ１０の軸方向幅よりも若干短くしてある。詳しくは、以下のように締付力保持部材５５の長さが定められている。すなわち、締付力保持部材５５の長さをl、ハブ１０の軸方向幅をＬとした場合、
ｌ＝Ｌ−ｄｌ・・・（式１）
の関係が成り立つ。ここで、ｄｌは、ハブ１０の弾性変形上限の変位量である。なお、図７ではｄｌの寸法を誇張して表示しているが、実際のｄｌの寸法は視認が困難な程度に微小である。 As shown in FIG. 7, the length of the tightening force holding member 55 is slightly shorter than the axial width of the hub 10. Specifically, the length of the tightening force holding member 55 is defined as follows. That is, when the length of the tightening force holding member 55 is l and the axial width of the hub 10 is L,
l = L-dl ... (Equation 1)
The relationship holds. Here, dl is the displacement amount of the upper limit of elastic deformation of the hub 10. Although the dl size is exaggerated in FIG. 7, the actual dl size is so small that it is difficult to visually recognize it.

締付力保持部材５５は、ハブ１０のボルト孔１０ａの内周面に単に嵌合させただけでもよいが、接着剤により固定してもよい。締付力保持部材５５を接着剤により固定する場合、図７のように、ボルト孔１０ａの中央部に締付力保持部材５５が位置するように固定するとよい。 The tightening force holding member 55 may be simply fitted to the inner peripheral surface of the bolt hole 10a of the hub 10, or may be fixed by an adhesive. When the tightening force holding member 55 is fixed with an adhesive, it is preferable to fix the tightening force holding member 55 so that the tightening force holding member 55 is located at the center of the bolt hole 10a as shown in FIG.

ハブ１０と一対のフランジ部材５１，５２とを締結するボルト５３を締め付けると、ハブ１０が弾性変形してその軸方向幅が狭くなることにより、締付力保持部材５５の両端が一対のフランジ部材５１，５２に当接する。この状態では、水車翼１が変動荷重を受けて一対のフランジ部材５１，５２から水車翼１の中心部に対して圧縮力が作用した場合、その圧縮力を締付力保持部材５５が受けてハブ１０には大きな圧縮力がかからないため、ハブ１０のクリープ変形が抑制される。このように、ハブ１０のクリープ変形を抑制することで、ボルト５３の緩みを防いで、ハブ１０とフランジ部材５１，５２の締付力の低下を回避することができる。 When the bolt 53 that fastens the hub 10 and the pair of flange members 51 and 52 is tightened, the hub 10 is elastically deformed and its axial width is narrowed, so that both ends of the tightening force holding member 55 are paired flange members. It abuts on 51 and 52. In this state, when the turbine blade 1 receives a fluctuating load and a compressive force acts from the pair of flange members 51 and 52 on the central portion of the turbine blade 1, the tightening force holding member 55 receives the compressive force. Since a large compressive force is not applied to the hub 10, creep deformation of the hub 10 is suppressed. By suppressing the creep deformation of the hub 10 in this way, it is possible to prevent the bolt 53 from loosening and to avoid a decrease in the tightening force between the hub 10 and the flange members 51 and 52.

締付力保持部材５５の長さｌを、式１を満たす長さとした場合、ボルト５３を締め付けた状態で、ハブ１０が弾性変形の上限まで変形する。このため、ボルト５３の締付けが強固となり、ボルト５３がより一層緩み難くなる。 When the length l of the tightening force holding member 55 is a length satisfying Equation 1, the hub 10 is deformed to the upper limit of elastic deformation while the bolt 53 is tightened. Therefore, the tightening of the bolt 53 becomes strong, and the bolt 53 becomes more difficult to loosen.

なお、締付力保持部材５５は、式１の寸法関係とすることでボルト５３の締付力を強化できる形状、寸法であればよく、必ずしも円筒状でなくてもよい。例えば、断面形状がＵ字形や溝形の部材であってもよい。 The tightening force holding member 55 may have a shape and size that can strengthen the tightening force of the bolt 53 by the dimensional relationship of the formula 1, and does not necessarily have to be cylindrical. For example, the member may have a U-shaped cross section or a groove shape.

また、ハブ１０とフランジ部材５１，５２の締付力が確保されているため、水車翼１に交番荷重が作用しても、ハブ１０とフランジ部材５１，５２との間に隙間ができたり、その隙間が閉じたりすることがなく、ハブ１０におけるフランジ部材５１，５２との接触面にフレッティング摩耗が起きない。そのため、水車翼１の繊維強化プラスチック材の内部への水の浸透が抑制され、水車翼１の材料劣化による強度低下を防止することができる。 Further, since the tightening force between the hub 10 and the flange members 51 and 52 is secured, even if an alternating load acts on the turbine blade 1, a gap may be formed between the hub 10 and the flange members 51 and 52. The gap is not closed, and fretting wear does not occur on the contact surfaces of the hub 10 with the flange members 51 and 52. Therefore, the permeation of water into the fiber-reinforced plastic material of the water turbine blade 1 is suppressed, and the strength reduction due to the material deterioration of the water turbine blade 1 can be prevented.

締付力保持部材５５がハブ１０のボルト孔１０ａの内周面に接着剤により固定されていると、締付力保持部材５５がボルト孔１０ａの中で動くことによるボルト孔１０ａの内周面の損傷を抑制される。それにより、ボルト孔１０ａの内周面からの繊維強化プラスチック材の内部への水の浸透も抑制される。
締付力保持部材５５を接着剤により固定する場合、図７に示すように、ボルト孔１０ａの中央部に締付力保持部材５５を固定すると、ボルト５３の締付けによるハブ１０の弾性変形が軸方向の両側で均等に行われるので好ましい。 When the tightening force holding member 55 is fixed to the inner peripheral surface of the bolt hole 10a of the hub 10 with an adhesive, the tightening force holding member 55 moves in the bolt hole 10a to cause the inner peripheral surface of the bolt hole 10a. Damage is suppressed. As a result, the permeation of water from the inner peripheral surface of the bolt hole 10a into the inside of the fiber reinforced plastic material is also suppressed.
When the tightening force holding member 55 is fixed with an adhesive, as shown in FIG. 7, when the tightening force holding member 55 is fixed to the central portion of the bolt hole 10a, the elastic deformation of the hub 10 due to the tightening of the bolt 53 is the axis. It is preferable because it is performed evenly on both sides of the direction.

上記のように水車翼１の繊維強化プラスチック材への水の浸透が抑制されるため、耐水性の高い高価な繊維強化プラスチック材を使用しなくて済む。また、締付力保持部材５５が円筒状であるため、締付力保持部材５５自体の加工が容易であるだけでなく、ボルト孔１０ａの加工も容易である。このため、低コストで水車翼１の強度低下防止を実現できる。 Since the permeation of water into the fiber-reinforced plastic material of the water turbine blade 1 is suppressed as described above, it is not necessary to use an expensive fiber-reinforced plastic material having high water resistance. Further, since the tightening force holding member 55 has a cylindrical shape, not only the tightening force holding member 55 itself can be easily machined, but also the bolt hole 10a can be easily machined. Therefore, it is possible to prevent the strength of the turbine blade 1 from being lowered at low cost.

また、ハブ１０のボルト孔１０ａの内周面とボルト５３の外周面との間に締付力保持部材５５を介在させたことにより、ボルト５３がボルト孔１０ａの内周面に接触しなくなる。そのため、水車翼１が水から受けるスラスト方向の変動荷重が発生しても、ボルト孔１０ａの内周面表層部の摩耗を防止できる。その結果、水車翼１の材料である繊維強化プラスチック材の内部への水の浸透が抑制され、水車翼１の材料劣化による強度低下を防止することができる。 Further, by interposing the tightening force holding member 55 between the inner peripheral surface of the bolt hole 10a of the hub 10 and the outer peripheral surface of the bolt 53, the bolt 53 does not come into contact with the inner peripheral surface of the bolt hole 10a. Therefore, even if a variable load in the thrust direction that the turbine blade 1 receives from water is generated, it is possible to prevent wear of the inner peripheral surface surface layer portion of the bolt hole 10a. As a result, the permeation of water into the fiber-reinforced plastic material which is the material of the water turbine blade 1 is suppressed, and the strength decrease due to the material deterioration of the water turbine blade 1 can be prevented.

［第３の実施形態］
第１の実施形態（図４）および第２の実施形態（図６）では、ボルト５３のねじ部５３ａがハブ１０のボルト孔１０ａと軸方向に重なっていないが、図８に示す第３の実施形態のように、ボルト５３のねじ部５３ａの一部がハブ１０のボルト孔１０ａと軸方向に重なっていてもよい。この場合、ねじ孔であるボルト孔５２ａの軸方向全域にボルト５３のねじ部５３ａが螺合するため、大きな締結力が得られる。 [Third Embodiment]
In the first embodiment (FIG. 4) and the second embodiment (FIG. 6), the threaded portion 53a of the bolt 53 does not vertically overlap the bolt hole 10a of the hub 10, but the third embodiment shown in FIG. As in the embodiment, a part of the screw portion 53a of the bolt 53 may overlap with the bolt hole 10a of the hub 10 in the axial direction. In this case, since the screw portion 53a of the bolt 53 is screwed over the entire axial direction of the bolt hole 52a which is the screw hole, a large fastening force can be obtained.

［第４の実施形態］
しかし、図８のようにボルト５３のねじ部５３ａの一部がハブ１０のボルト孔１０ａと軸方向に重なっていると、ねじ部５３ａが締付力保持部材５５と接触して締付力保持部材５５が摩耗する懸念がある。このような締付力保持部材５５の摩耗を防止するために、図９のように構成するとよい。図９に示す第４の実施形態は、下流側のフランジ部材５２の軸方向内側面に、ボルト孔５２ａの外周に拡がる断面円形の凹部５８が設けられ、この凹部５８に締付力保持部材５５の上流側端が嵌まり込んでいる。ボルト５３のねじ部５３ａは、ねじ孔であるボルト孔５２ａに螺合している。ねじ部５３ａの基端位置は、凹部５８またはボルト孔５２ａの軸方向範囲内にある。つまり、ボルト５３のねじ部５３ａは、水車翼１よりも軸方向の外側に位置している。これにより、ボルト５３のねじ部５３の一部が締付力保持部材５５と接触することがなく、締付力保持部材５５の摩耗が軽減される。 [Fourth Embodiment]
However, when a part of the screw portion 53a of the bolt 53 overlaps the bolt hole 10a of the hub 10 in the axial direction as shown in FIG. 8, the screw portion 53a comes into contact with the tightening force holding member 55 to hold the tightening force. There is a concern that the member 55 may be worn. In order to prevent such wear of the tightening force holding member 55, it is preferable to configure as shown in FIG. In the fourth embodiment shown in FIG. 9, a recess 58 having a circular cross section extending to the outer periphery of the bolt hole 52a is provided on the inner side surface of the flange member 52 on the downstream side in the axial direction, and the tightening force holding member 55 is provided in the recess 58. The upstream end of is fitted. The threaded portion 53a of the bolt 53 is screwed into the bolt hole 52a, which is a screw hole. The base end position of the threaded portion 53a is within the axial range of the recess 58 or the bolt hole 52a. That is, the screw portion 53a of the bolt 53 is located outside the water turbine blade 1 in the axial direction. As a result, a part of the screw portion 53 of the bolt 53 does not come into contact with the tightening force holding member 55, and the wear of the tightening force holding member 55 is reduced.

第２ないし第４の各実施形態において、特に説明した事項の他は、第１の実施形態と同様である。
上記各実施形態は、ハブ１０の両フランジ５１，５２の軸方向の厚さをそれぞれ均等としたが、両フランジ５１，５２は、軸方向に対向する部分の厚さが互いに同じであれば、必ずしも均等な厚さでなくてもよい。
上記各実施形態は、水車翼１がプロペラ水車であり、かつその回転軸心Ｏが水流方向と平行である水力発電装置に適用された水車翼取付け構造を示すが、この発明は、水車翼１の回転軸心Ｏが水流方向と平行でない場合にも適用できる。また、水車翼１がプロペラ水車でない水力発電装置にも適用できる。 In each of the second to fourth embodiments, except for the matters described in particular, the same as in the first embodiment.
In each of the above embodiments, the thicknesses of the flanges 51 and 52 of the hub 10 in the axial direction are equal to each other, but if the thicknesses of the portions of the flanges 51 and 52 facing each other in the axial direction are the same, the thicknesses of the flanges 51 and 52 are equal. It does not necessarily have to be a uniform thickness.
Each of the above embodiments shows a turbine blade mounting structure applied to a hydroelectric power generation device in which the turbine blade 1 is a propeller turbine and its rotation axis O is parallel to the water flow direction. However, the present invention shows the turbine blade 1 It can also be applied when the rotation axis O of is not parallel to the water flow direction. Further, it can be applied to a hydroelectric power generation device in which the turbine blade 1 is not a propeller turbine.

以上、実施例に基づいて本発明を実施するための形態を説明したが、ここで開示した実施の形態はすべての点で例示であって制限的なものではない。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 Although the embodiments for carrying out the present invention have been described above based on the examples, the embodiments disclosed here are examples in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

１…水車翼
３…発電機
１０…ハブ
１０ａ，５１ａ，５２ａ…ボルト孔
１１…羽根
２０…水車軸
５０…貫通孔
５１，５２…フランジ部材
５３…ボルト
５５…締付力保持部材
６１，６２…面取り部
Ｏ…回転軸心 1 ... Water wheel blade 3 ... Generator 10 ... Hub 10a, 51a, 52a ... Bolt hole 11 ... Blade 20 ... Water wheel shaft 50 ... Through hole 51, 52 ... Flange member 53 ... Bolt 55 ... Tightening force holding member 61, 62 ... Chamfering part O ... Rotation axis

Claims (6)

繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置における、前記水車翼を水車軸に対して一体回転するように取り付ける水車翼取付け構造であって、
前記水車翼は中心部に中実のハブを有し、このハブに設けられた貫通孔に前記水車軸が挿通され、
前記ハブの両側面に一対のフランジ部材が配置され、前記ハブおよび前記一対のフランジ部材に設けられたボルト孔にわたってボルトが挿通され、このボルトにより前記ハブと前記一対のフランジ部材とが締結され、
前記一対のフランジ部材が前記水車軸に取り付けられ、
前記一対のフランジ部材は、前記ボルトの長さ方向の厚さが互いに同じで、かつ前記ハブとの接触面積が互いに同じである水力発電装置の水車翼取付け構造。 In a hydroelectric power generator equipped with a turbine wing made of a fiber-reinforced plastic material and a generator that generates electricity in response to the rotation of the turbine wing, the turbine wing is attached so as to rotate integrally with the turbine shaft. It's a structure
The turbine blade has a solid hub in the center, and the turbine shaft is inserted through a through hole provided in the hub.
A pair of flange members are arranged on both side surfaces of the hub, bolts are inserted through the bolt holes provided in the hub and the pair of flange members, and the hub and the pair of flange members are fastened by the bolts.
The pair of flange members are attached to the water axle and
The pair of flange members have a water wheel blade mounting structure of a hydroelectric power generator having the same thickness of the bolts in the length direction and the same contact area with the hub. 請求項１に記載の水力発電装置の水車翼取付け構造において、前記フランジ部材における前記ハブとの接触面の縁に面取り部が設けられている水力発電装置の水車翼取付け構造。 The water turbine blade mounting structure of the hydroelectric power generation device according to claim 1, wherein a chamfered portion is provided on the edge of the contact surface of the flange member with the hub. 請求項１に記載の水力発電装置の水車翼取付け構造において、前記ハブの前記ボルト孔の内周面と前記ボルトの外周面との間に、前記ハブの軸方向幅よりも長さが短く、前記ボルトの締付けにより両端が前記一対のフランジ部材に当接する締付力保持部材が介在することを特徴とする水力発電装置の水車翼取付け構造。 In the water turbine blade mounting structure of the hydroelectric power generation device according to claim 1, the length between the inner peripheral surface of the bolt hole of the hub and the outer peripheral surface of the bolt is shorter than the axial width of the hub. A water turbine blade mounting structure of a hydroelectric power generation device, characterized in that a tightening force holding member whose both ends abut against the pair of flange members is interposed by tightening the bolt. 請求項１ないし請求項３のいずれか１項に記載の水力発電装置の水車翼取付け構造において、前記水車翼は、複数の羽根を有するプロペラ水車である水力発電装置の水車翼取付け構造。 In the water turbine blade mounting structure of the hydroelectric power generation device according to any one of claims 1 to 3, the water wheel blade is a water wheel blade mounting structure of a hydroelectric power generation device which is a propeller water turbine having a plurality of blades. 請求項４に記載の水力発電装置の水車翼取付け構造において、前記プロペラ水車である水車翼は、回転軸心が水流方向と平行である水力発電装置の水車翼取付け構造。 In the water turbine blade mounting structure of the hydroelectric power generation device according to claim 4, the water turbine wing, which is the propeller water wheel, has a water wheel wing mounting structure of the hydroelectric power generation device whose rotation axis is parallel to the water flow direction. 繊維強化プラスチック材からなる水車翼と、この水車翼の回転を受けて発電を行う発電機とを備えた水力発電装置であって、請求項１ないし請求項５のいずれか１項に記載の水車翼取付け構造によって、前記水車翼が水車軸に対して一体回転するように取り付けられた水力発電装置。 The water turbine according to any one of claims 1 to 5, which is a hydroelectric power generator including a water turbine wing made of a fiber-reinforced plastic material and a generator that generates electricity by receiving the rotation of the water turbine wing. A hydroelectric power generator mounted so that the turbine blades rotate integrally with the turbine shaft by a blade mounting structure.
JP2019054824A 2018-08-20 2019-03-22 Water turbine blade fitting structure of hydraulic generating apparatus and hydraulic generating apparatus Pending JP2020153346A (en)

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JP2019054824A JP2020153346A (en) 2019-03-22 2019-03-22 Water turbine blade fitting structure of hydraulic generating apparatus and hydraulic generating apparatus
PCT/JP2019/032318 WO2020040098A1 (en) 2018-08-20 2019-08-19 Water turbine mounting structure for hydroelectric power generation device, and hydroelectric power generation device
CN201980054974.9A CN112639282B (en) 2018-08-20 2019-08-19 Hydroelectric generation device's turbine wing mounting structure and hydroelectric generation device
KR1020217005806A KR20210044798A (en) 2018-08-20 2019-08-19 Water Turbine Mounting Structure and Hydroelectric Power Plant of Hydroelectric Power Plant

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WO2012130978A1 (en) * 2011-03-30 2012-10-04 Gurit (Uk) Ltd Water-turbine blade and an elongate spar therefor
JP2016176413A (en) * 2015-03-20 2016-10-06 株式会社ベルシオン Propeller rotor
US20170122335A1 (en) * 2014-06-24 2017-05-04 Tlt-Turbo Gmbh Impeller for axial fans
US20170241396A1 (en) * 2016-02-18 2017-08-24 Andritz Hydro Gmbh Pelton runner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0555119U (en) * 1991-12-27 1993-07-23 コパル電子株式会社 Light deflector
US20090092495A1 (en) * 2007-10-05 2009-04-09 Benoit Des Roches Axial flow hydraulic turbine with fixed blades bolted-on
WO2012130978A1 (en) * 2011-03-30 2012-10-04 Gurit (Uk) Ltd Water-turbine blade and an elongate spar therefor
US20170122335A1 (en) * 2014-06-24 2017-05-04 Tlt-Turbo Gmbh Impeller for axial fans
JP2016176413A (en) * 2015-03-20 2016-10-06 株式会社ベルシオン Propeller rotor
US20170241396A1 (en) * 2016-02-18 2017-08-24 Andritz Hydro Gmbh Pelton runner

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