JP5574408B2 - Fluid power device and fluid power generator - Google Patents

Description

  The present invention relates to a fluid power device and a fluid power generator.

  Conventionally, various technologies relating to a power device that converts flowing water energy of a water channel or a river into rotational energy and a power generation device that generates electric power using the converted rotational energy have been proposed and put into practical use. For example, as a power device that uses flowing water energy such as an irrigation channel, an underwater type (underhanging) water turbine that is rotated by the energy of flowing water hitting the lower part has been used in rural areas for a long time.

  At present, a technique has been proposed in which a small propeller turbine is installed in a relatively shallow river, and the energy of running water in the river is converted into electric energy using the propeller turbine (see Patent Document 1). Furthermore, in recent years, a hydrodynamic power device (see Patent Document 2) that reciprocates a wing member up and down using lift generated by flowing water and converts the reciprocating motion of the wing member into rotational energy has been proposed.

JP 2007-32338 A International Publication No. 2008/123154 Pamphlet

  However, in the above-described conventional water turbine and power generation device, there is still room for improvement in efficiently extracting flowing water energy in a wide area in the depth direction of rivers and irrigation canals as described below.

  Since the epi-type turbine has a structure that receives flowing water only at the lower part of the turbine, for example, in order to effectively use the flowing energy of the irrigation channel having a depth of about 2 m for power generation, the diameter of the turbine needs to be about 10 m. There is a problem that much labor and cost are required to manufacture and install the apparatus.

  The propeller turbine described in Patent Document 1 can be applied to a deep water region by increasing the diameter of the propeller, but requires a great deal of labor and cost for manufacturing and installing the device. In addition, when such a propeller turbine is employed, various drifting objects such as grass and plastic bags existing in the river are likely to adhere to the propeller, and thus work for frequently removing the attached dust is required. Since the hydrodynamic power device described in Patent Document 2 reciprocates up and down a wing member disposed near the water surface, there is still room for improvement in effectively utilizing flowing water energy in a deep water region. there were.

  The present invention has been made in view of such circumstances, and it is possible to efficiently extract flowing water energy in a wide area in the depth direction and the horizontal direction while suppressing labor and cost required for production and installation, and flowing water. It is an object of the present invention to provide a fluid type power unit that is less affected by an object present therein and a fluid type power generation device including the fluid type power unit.

  In order to achieve the above object, a hydrodynamic power device according to the present invention comprises a movable member configured to reciprocate along a fixed shaft extending in a direction substantially perpendicular to a predetermined flow of fluid. The angle of attack with respect to the flow is changed by being rotatably attached to the movable member via a blade rotation shaft extending in a direction substantially perpendicular to the flow and the extending direction of the fixed shaft. And at least one wing member, and an angle of attack for reciprocating the movable member by reversing the force generated in the wing member by changing the angle of attack of the wing member with respect to the flow from positive to negative or from negative to positive The reversing means, a rotating member that rotates about a rotating shaft extending in a predetermined direction, and a power conversion means that converts the reciprocating motion of the movable member into the rotating motion of the rotating member.

  By adopting such a configuration, by changing the angle of attack of the wing member from positive to negative (or from negative to positive), the direction of the force (drag and lift) generated in the wing member is reversed, and the fluid in a predetermined direction A reciprocating motion of the movable member in a direction substantially perpendicular to the flow can be realized. Such reciprocating motion of the movable member can be converted into rotational motion of the rotating member. Here, when the movable member is a long member extending in the reciprocating direction, a large number of wing members can be arranged along the extending direction of the movable member. By extending in the water depth direction (or horizontal direction) and reciprocating, fluid energy in a wide region in the water depth (horizontal) direction can be efficiently extracted. In addition, since a large epi-type water turbine or propeller water turbine is not required, labor and cost required to create and install the device can be suppressed. Furthermore, since the angle of attack of the wing member changes during the reciprocating motion of the movable member, various objects (grass, plastic bags, etc.) drifting in the river are difficult to adhere to the wing member, and are easily removed even when attached. Have advantages.

  In the fluid power unit, a cylindrical member having a predetermined length in the reciprocating direction can be employed as the movable member. In such a case, it is preferable to arrange a plurality of wing members along the length direction of the cylindrical member and to interlock these wing members.

  When such a configuration is adopted, a plurality of wing members arranged along a direction substantially perpendicular to the flow of the fluid in a predetermined direction can be interlocked. Therefore, for example, in a relatively deep river or sea, a large number of wing members can be arranged and interlocked in the direction of the water depth, and the flowing water energy in a wide area from a shallow depth to a deep location can be converted into rotational energy. Can do. Moreover, in relatively wide rivers and vast oceans, a large number of wing members can be arranged and interlocked along the horizontal direction (a direction substantially perpendicular to the river flow and the ocean current). It is also possible to take out the flowing water energy.

  Further, in the fluid power unit, the blade rotation shaft is disposed on or near the blade chord of the blade member, and the distance from the blade rotation shaft to the leading edge of the blade member is determined by the distance from the blade rotation shaft to the blade member. Can be longer than the distance to the trailing edge. In particular, the distance from the blade rotation shaft to the leading edge of the blade member is about 1.3 times the distance from the blade rotation shaft to the trailing edge of the blade member (within a range of 1.2 to 1.5 times). It is preferable to set.

  When this configuration is adopted, the distance from the blade rotation shaft to the blade member leading edge is longer than the distance from the blade rotation shaft to the blade member trailing edge, so that a large amount of fluid is generated in the upstream portion of the blade member. Can receive. Therefore, the angle of attack of the wing member can be made constant during the reciprocating motion of the movable member. In addition, when the movable member reaches both ends of the reciprocating motion, it becomes possible to quickly reverse the angle of attack of the wing member to a predetermined value, and it is possible to generate a large lift and drag on the wing member immediately after the angle of attack is reversed. It becomes possible.

  In the fluid power unit, it is preferable to gradually change the position of the leading edge of the blade member toward the downstream side of the flow from the blade root side to the blade tip side of the blade member (adopting a swept blade). .

  When such a configuration is adopted, since the position of the leading edge of the wing member recedes from the blade root side to the blade tip side of the wing member, various objects drifting in the river are unlikely to collect on the leading edge of the wing member.

  Further, in the fluid type power unit, a cylindrical member fixedly arranged so as to extend in a direction substantially perpendicular to the flow is adopted as a fixed shaft, and the outer periphery of the cylindrical member can be slid through a bearing. The cylindrical member arrange | positioned in can be employ | adopted as a movable member. In such a case, it is preferable to employ blade rotation preventing means for preventing the blade member from rotating around the cylindrical member together with the cylindrical member.

  By adopting such a configuration, the blade member can be prevented from rotating around the cylindrical member (fixed shaft) together with the cylindrical member (movable member) by the force of the fluid, so that the posture of the blade member with respect to the fluid is stabilized. Can be made.

  In the fluid power unit, an angle-of-attack adjusting means for setting an upper limit of the angle of attack of the wing member can be employed. Using such an angle-of-attack adjusting means, the upper limit of the angle of attack of the wing member can be set to 45 degrees, for example.

  When such a configuration is adopted, the upper limit of the angle of attack of the wing member can be adjusted.For example, when applied to a relatively slow flow, the upper limit of the angle of attack is set to a relatively large value so that a large amount of fluid can be supplied to the wing member. By receiving it, it is possible to generate a force with priority on drag. On the other hand, when applied to a relatively fast flow, the upper limit of the angle of attack can be set to be relatively small to generate a force with a higher lift priority. Therefore, it is possible to efficiently extract fluid energy according to the flow situation.

  Further, in the fluid type power unit, immediately before the movable member reaches the position farthest from the center of the reciprocating motion, the angle of attack is obtained by preventing the movement of the leading edge of the wing member and forcibly rotating the wing member. An angle-of-attack reversing means for reversing can be adopted. As such an angle-of-attack reversing means, for example, an elasticity arranged so as to contact the leading edge (or the vicinity of the leading edge) of the wing member immediately before reaching the position farthest from the center of the reciprocating motion of the movable member. A member can be employed. In addition, a fluid supply means configured to supply fluid locally toward the leading edge of the wing member immediately before reaching the position farthest from the center of the reciprocating motion of the movable member is adopted as the angle of attack reversing means. You can also

  Further, in the fluid power device, the wing member can be arranged so as to generate a force in the depth direction of the flowing water of the river or the irrigation channel, and the reciprocating motion of the movable member in the depth direction can be realized. In such a case, a plurality of wing members extending in the vertical direction (horizontal direction) with respect to the reciprocating direction (water depth direction) of the movable member can be provided side by side in the water depth direction. At this time, the aspect ratio (blade length / average chord length) of the wing member is preferably set to 6 or more.

  Further, in the fluid power device, only the wing member can be disposed below the surface of a predetermined river, irrigation channel, tidal current, or ocean current, and the reciprocating motion of the movable member in the horizontal direction can be realized.

  When such a configuration is adopted, the movable member and the fixed shaft are arranged on the water surface, so that the movable member and the fixed shaft not only receive the pressure of flowing water, but also are hardly affected by drifting objects, and the movable member can be stably moved.

  Moreover, the fluid type power generator according to the present invention includes the above-described fluid type power unit and a generator that generates electric power by the rotational motion of the rotating member of the fluid type power unit.

  By adopting such a configuration, it is possible to efficiently extract the flowing water energy in a wide region in the vertical direction (water depth direction) and the horizontal direction (width direction of the river or the canal) and convert it into electric energy.

  In the fluid power generation device, at least a part of the wing member of the fluid power device is disposed inside the flowing water of a predetermined river or irrigation channel, and the movable member, the rotating member, and the power conversion means of the fluid power device are arranged in the river or irrigation channel. Can be placed on the surface of the water.

  When such a configuration is adopted, the fluid power generation device according to the present invention can be used as a hydroelectric power generation device. At this time, most of the members constituting the hydrodynamic power device can be arranged above the water surface of the river or the canal to avoid contact with water, thereby reducing the chance of failure of the device and extending the service life. It becomes possible.

  According to the present invention, it is possible to efficiently extract flowing water energy in a wide area in the depth direction and the horizontal direction while suppressing labor and cost required for production and installation, and it is affected by an object existing in the flowing water. It is possible to provide a fluid type power unit that is less likely to occur and a fluid type power generator including the same.

It is a top view of a hydroelectric generator (fluid power generator) provided with a fluid power unit concerning an embodiment of the present invention. It is a front view of the hydroelectric generator shown in FIG. It is an enlarged front view of the wing | blade member of the hydroelectric generator shown in FIG. It is the figure which looked at the wing | blade member shown in FIG. 3 from IV direction. (A)-(E) are explanatory drawings for demonstrating operation | movement of the hydroelectric power generator shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, an example in which the fluid power generation device according to the present invention is applied to a hydroelectric power generation device installed in a water channel will be described.

  First, the configuration of the hydroelectric generator 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the hydroelectric generator 1 is installed in the irrigation channel F having a predetermined depth, and the energy of the water flowing in the irrigation channel F (the energy of the flowing water W flowing in the direction of the arrow in FIG. 1) is converted into rotational energy. To generate electric power. The hydroelectric generator 1 includes a hydrodynamic power device 2 that converts the energy of the flowing water W into rotational energy of a predetermined rotating member 30, and a generator 3 that generates electric power by the rotational energy of the rotating member 30 of the hydrodynamic power device 2. It is equipped with.

  The fluid type power unit 2 reciprocates along the columnar member 11 disposed so as to extend in a direction substantially perpendicular to the flowing water W (left-right direction in FIGS. 1 to 3: the width direction of the water channel F). The movable member 10 having a predetermined length configured as described above, a plurality of wing members 20 arranged along the length direction of the movable member 10 and attached to the movable member 10, and the vertical direction in FIGS. And a rotating member 30 that rotates about a rotating shaft 31 that extends in the direction of the depth of the running water W). The fluid power device 2 realizes the reciprocating motion of the movable member 10 by changing the angle of attack of the blade member 20 with respect to the flowing water W, and converts this reciprocating motion into the rotational motion of the rotating member 30.

Cylindrical member 11, using fixing means (not shown), which is fixedly arranged above the water surface S _F running water W of canal F 2 to 4, functions as a fixed shaft in the present invention To do. The movable member 10 is a cylindrical member having a predetermined length in a reciprocating direction (left and right direction in FIGS. 1 to 3) and slidably disposed on the outer periphery of the columnar member 11 via a bearing 12. .

Each wing member 20 has an airfoil cross-sectional shape capable of generating a force (lift force and drag force) in a direction substantially perpendicular to the flowing water W of the water channel F. Each wing member 20 in the present embodiment, as shown in FIGS. 2-4, are disposed above the water surface S _F running water W portions canal F to about 40% about of the blade root side, the wing tip about about 60% of the portion is located inside (below the water surface S _F) of the flowing water W of. In the present invention, the angle of attack when the wing member is rotated to one side from a predetermined reference posture is referred to as “positive”, and the angle of attack when the wing member is rotated in the opposite direction is referred to as “negative”. In the present embodiment, the angle of attack when the wing member 20 is rotated in the R ₁ direction of FIG. 1 is referred to as “positive”, and the angle of attack when the wing member 20 is rotated in the R ₂ direction of FIG.

  As shown in FIG. 4, each wing member 20 is provided with a through hole 22 penetrating from one surface to the other surface. Then, in a state in which the movable member 10 is inserted into the through hole 22 of each wing member 20, a direction substantially perpendicular to the flowing direction of the flowing water W and the extending direction of the cylindrical member 11 (the vertical direction in FIGS. Each blade member 20 is rotatably attached to the movable member 10 via a blade rotation shaft 21 extending in the direction of water depth of the flowing water W). Thereby, the angle of attack of each wing member 20 with respect to flowing water W changes. Such a change in the angle of attack of the wing member 20 generates a force in the left-right direction in FIG. 1 to FIG. 3 (the width direction of the water channel F). Do exercise.

  The three wing members 20 are connected by a connecting member 23 as shown in FIG. At this time, the front edge 20a of each wing member 20 is pivotally attached to the connecting member 23 via the hinge member 24, and when one wing member 20 rotates about the wing rotation shaft 21, the remaining The two wing members 20 are also interlocked. For this reason, the angle of attack of all the wing members 20 changes simultaneously. In the present embodiment, casters 25 are attached to both ends of the connecting member 23. These casters 25 are arranged so as to come into contact with an elastic member 15 described later immediately before the movable member 10 reaches a position farthest from the center of the reciprocating motion.

  As shown in FIG. 1, a plurality of stoppers 13 for setting the upper limit of the angle of attack of the wing member 20 are provided on the front (upstream) side surface and the rear (downstream) side surface of the movable member 10. Yes. The stopper 13 functions as an angle-of-attack adjusting means in the present invention. In the present embodiment, the stopper 13 that sets the upper limit of the positive and negative angle of attack of the central wing member 20 to about 45 degrees among the three wing members 20 arranged along the length direction of the movable member 10 is employed. ing. Since the three wing members 20 are connected via the connecting member 23 and the angle of attack of all the wing members 20 is changed at the same time, if the angle of attack of the central wing member 20 is limited, the remaining two The angle of attack of the two wing members 20 is also limited.

  The upper limit of the angle of attack of each wing member 20 can be easily adjusted by changing the shape and structure of the stopper 13. For example, when the running water W is relatively slow, the upper limit of the angle of attack of each wing member 20 is set to be relatively large, and the shape and structure of the stopper 13 are determined so as to generate a force with priority on the drag. On the other hand, when the flowing water W is relatively fast, the upper limit of the angle of attack of each wing member 20 is set to be relatively small, and the shape and structure of the stopper 13 are determined so as to generate a force with a higher priority to lift. Since the stopper 13 is in contact with the surface of the wing member 20, it is preferable that the stopper 13 is made of an elastic material such as rubber.

  In the present embodiment, as shown in FIG. 1, the blade rotation shaft 21 is disposed on the chord of the wing member 20 (or near the chord), and the leading edge of the wing member 20 from the blade rotation shaft 21. The distance A to 20a is set longer than the distance B from the blade rotation shaft 21 to the rear edge 20b of the blade member 20. In this way, a large amount of running water W can be received at the upstream side portion of the wing member 20, and a sufficient force is generated in the wing member 20 immediately after the angle of attack of the wing member 20 is reversed. 10 reciprocating motions can be stabilized. The distance A is preferably set to about 1.3 times the distance B (within a range of 1.2 to 1.5 times).

  In the present embodiment, as shown in FIG. 4, the position of the leading edge 20a of the wing member 20 is gradually changed to the downstream side of the flowing water W from the blade root side to the blade tip side. (As a swept wing). Since the extending direction of the leading edge 20a of the wing member 20 is not perpendicular to the flowing water W in this way, grass, plastic bags, etc. drifting in the irrigation channel F are unlikely to collect on the leading edge 20a of the wing member 20. Become. In the present embodiment, the specific gravity of the wing member 20 is set to approximately 1 in order to facilitate the movement of the wing member 20 in water. As a material of the wing member 20, a metal material such as stainless steel can be used for the outer skin portion, and a lightweight resin material such as foamed polystyrene can be used for the inside.

  It is preferable that the airfoil (cross-sectional shape) of each wing member 20 is symmetrical as shown in FIG. Further, the blade length (length in the vertical direction in FIGS. 2 to 4), chord length, and blade thickness of each blade member 20 are the width of the irrigation channel F, the depth and speed of the flowing water W in the irrigation channel F, and the hydroelectric generator. It can be set as appropriate in consideration of the scale of 1. At this time, it is preferable that the blade length of each blade member 20 is set so that each blade member 20 is arranged over about 70% of the flowing water W of the irrigation channel F in the depth direction. The aspect ratio (blade length / average chord length) of each wing member 20 is preferably set to 6 or more.

  As shown in FIG. 4, a caster 26 that rotates about the blade rotation shaft 21 is attached to a portion near the blade root of each blade member 20. As shown in FIGS. 2 to 4, the outer peripheral surface of the caster 26 extends above the column member 11 in a direction substantially parallel to the column member 11 (the horizontal direction in FIGS. 2 and 3: the width direction of the water channel F). The prism member 14 is fixedly arranged so as to abut one side surface of the prism member 14. The casters 26 and the prismatic members 14 thus provided can prevent the wing members 20 from rotating around the cylindrical member 11 together with the movable member 10 by the force of the flowing water W. The caster 26 and the prism member 14 constitute the blade rotation preventing means in the present invention.

  As shown in FIG. 1, the irrigation channel F is provided with a pair of plate-like elastic members 15 arranged in parallel to each other so as to sandwich the movable member 10 that reciprocates and the wing members 20 from the left and right. Yes. The elastic member 15 is disposed so as to abut on a caster 25 disposed in the vicinity of the front edge 20a of the wing member 20 immediately before the movable member 10 reaches the position farthest from the center of the reciprocating motion. Immediately before the movable member 10 reaches the position farthest from the center of the reciprocating motion, the movement of the leading edge 20a of the wing member 20 is prevented by the elastic member 15 arranged in this way, and each wing member 20 is forced. The angle of attack of each wing member 20 with respect to the flowing water W is reversed (changes from positive to negative or from negative to positive), and the force generated in each wing member 20 is reversed. As a result, the reciprocating motion of the movable member 10 is realized. The elastic member 15 functions as an angle-of-attack inverting means in the present invention.

As shown in FIG. 2, the rotating member 30 is disposed on the side of the irrigation channel F via a support member (not shown), and the vertical direction in FIGS. 2 to 4 (the depth direction of the flowing water W in the irrigation channel F). It can be rotated around a rotating shaft 31 extending to the center. The generator 3 is arranged further to the side of the rotating member 30, and the rotational energy of the rotating member 30 is transmitted to the generator 3 through the power transmission member 4, thereby generating electric power. Yes. In the present embodiment, as shown in FIG. 2, the movable member 10 and the rotating member 30, the generator 3, and the power transmission member 4 that constitute the fluid power device 2 are connected to the water surface S of the flowing water W in the water channel F. It is supposed to be placed above _F.

  The rotary member 30 has one end fixed to the rotary shaft 31 and rotating around the rotary shaft 31, and the other end rotating around the rotary shaft 32. And a disk-shaped member 33 that rotates in the same manner. As shown in FIG. 2, the rotating arms 32 are fixed to both ends of the rotating shaft 31 in a state where two rotating arms are arranged in parallel vertically, and rotate simultaneously around the rotating shaft 31. The rotational force of the rotating member 30 is transmitted to the generator 3 via the power transmission member 4 attached to the disk-shaped member 33. The rotating member 30 is connected to the movable member 10 via a connecting columnar member 40. The rotating member 30 in the present embodiment is a flywheel (flywheel), and when the angle of attack of the wing member 20 becomes zero (the chord direction of the wing member 20 is parallel to the water flow direction), that is, left and right of the wing member 20. When a direction force (a force for reciprocating the movable member 10) does not work, the rotating inertia force is used to smoothly rotate the rotary arm 32.

  The connecting columnar member 40 is a columnar member having a predetermined length that converts the reciprocating motion of the movable member 10 into the rotational motion of the rotating member 30. As shown in FIGS. 1 and 2, one end of the connecting columnar member 40 is rotatably attached to the movable member 10 via a blade rotation shaft 21 of the blade member 20 disposed near one end of the movable member 10. ing. The other end of the connecting columnar member 40 is attached to the other end of the rotating arm 32 via a rotating shaft 41 so as to be rotatable. As shown in FIG. 2, the connecting columnar member 40 is attached to the rotating arm 32 via a rotating shaft 41 in a state where two connecting columns 40 are arranged in parallel in the vertical direction. The reciprocating motion of the movable member 10 is converted into the rotational motion of the rotating member 30 via the connecting columnar member 40. That is, the connecting columnar member 40 functions as power conversion means in the present invention.

  Next, operation | movement of the hydroelectric generator 1 which concerns on this embodiment is demonstrated using FIG. 5 (A)-(E). 5A to 5E, the configuration of some members (stopper 13, rotating arm 32, connecting columnar member 40, etc.) is simplified so that the movement of each member becomes clear. Show.

  In the following description, it is assumed that the hydroelectric generator 1 is operated with the state shown in FIG. In the initial state, the rotary arm 32 of the rotary member 30 is located on the left side of FIG. 5A in a state of being arranged substantially perpendicular to the running water W, and the connecting columnar member 40 is also located with respect to the running water W. Are placed on the rotary arm 32 in a state of being arranged substantially at right angles. In the initial state, the movable member 10 is moved to the left side of FIG. 5A so as to be farthest from the center of the reciprocating motion, and the angle of attack of each wing member 20 attached to the movable member 10 is a little. Is negative.

  Since each wing member 20 is configured to be rotatable about the wing rotation shaft 21, the negative angle of attack of each wing member 20 is increased by running water W against each wing member 20 in the initial state. As shown in FIG. 5B, the angle is set to about 45 degrees by the stopper 13. Since a rightward force (lift force and drag force) acts on each wing member 20 having an increased angle of attack in this way, the movable member 10 starts to move in the right direction as shown in FIG. Then, the movement of the movable member 10 in the right direction is transmitted to the rotary arm 32 via the connecting columnar member 40, whereby the rotary member 30 starts to rotate around the rotary shaft 31.

  Thereafter, as shown in FIG. 5C, when the movable member 10 moves to the vicinity of the right side position that is farthest from the center of the reciprocating motion, the wing member 20 attached near the right end of the movable member 10 is moved. The casters 25 arranged in the vicinity of the front edge 20a abut against the elastic member 15, and the movement of the wing member 20 to the right side of the front edge 20a is prevented. On the other hand, as shown in FIG. 5D, the movable member 10 itself reciprocates so that the connecting columnar member 40 and the rotary arm 32 are in a straight line (the angle θ shown in FIG. 5C is zero). It continues to move to the right side due to its inertial force (right side position farthest from the center). As a result, each wing member 20 is forcibly rotated about the wing rotation shaft 21, and the angle of attack of each wing member 20 with respect to the flowing water W is changed from negative to positive as shown in FIG. The force generated in each wing member 20 changes and the movable member 10 starts to move in the left direction. When the moving direction of the movable member 10 is reversed, the rotating member 30 continues to rotate due to its inertial force. The reversed leftward movement of the movable member 10 is transmitted to the rotary arm 32 via the connecting columnar member 40, and the rotary drive of the rotary member 30 is continued.

  When the movable member 10 that has moved to the left as described above moves to the vicinity of the leftmost position that is farthest from the center of the reciprocating motion as shown in FIG. 5E, the movable member 10 is attached to the vicinity of the left end of the movable member 10. The caster 25 disposed in the vicinity of the front edge 20a of the wing member 20 is in contact with the elastic member 15, and movement of the wing member 20 to the left side of the front edge 20a is prevented. On the other hand, as shown in FIG. 5A, the movable member 10 itself continues to the left side due to its inertial force until the connecting columnar member 40 and the rotary arm 32 overlap (the leftmost position farthest from the center of the reciprocating motion). Move to. As a result, each wing member 20 is forcibly rotated about the wing rotation shaft 21, and the angle of attack of each wing member 20 with respect to the flowing water W changes from positive to negative, and the initial state shown in FIG. It will return to the state.

  The hydroelectric generator 1 realizes the continuous reciprocating motion of the movable member 10 in the left-right direction by sequentially repeating the above operations, and converts the energy of the reciprocating motion of the movable member 10 into the rotational energy of the rotating member 30, Electric power is generated by the generator 3.

  In the fluid power unit 2 according to the embodiment described above, the force (drag and lift) generated in each wing member 20 by changing the angle of attack of each wing member 20 from positive to negative (or from negative to positive). ) Is reversed, and the reciprocating motion of the movable member 10 in the direction substantially perpendicular to the flowing water W can be realized. Such reciprocating motion of the movable member 10 can be converted into rotational motion of the rotating member 30. At this time, since the angle of attack of each wing member 20 changes when the movable member 10 reciprocates, various objects (grass, plastic bags, etc.) drifting in the water are difficult to adhere to each wing member 20 and are attached. It has the advantage of being easily removed.

  Further, in the fluid power device 2 according to the embodiment described above, the distance from the blade rotation shaft 21 to the front edge 20a of the blade member 20 is the distance from the blade rotation shaft 21 to the rear edge 20b of the blade member 20. Since it is longer than the distance, a large amount of running water can be received in the upstream portion of the wing member 20. Therefore, the angle of attack of the wing member 20 can be made constant during the reciprocating motion of the movable member 10. Further, when the movable member 10 reaches both ends of the reciprocating motion, it becomes possible to quickly reverse the angle of attack of the wing member 20 to a predetermined value, and a large lift and drag force are generated on the wing member 20 immediately after the angle of attack is reversed. It becomes possible to make it.

  Further, in the fluid power unit 2 according to the embodiment described above, the position of the leading edge 20a of the blade member 20 gradually changes to the downstream side of the flowing water W as the blade root moves from the blade root side to the blade tip side. Therefore, various objects drifting in water are difficult to collect on the front edge 20a of the wing member 20 because the extending direction of the front edge 20a of the wing member 20 is not perpendicular to the flowing water W. .

  Further, in the fluid type power unit 2 according to the embodiment described above, each blade member 20 is moved together with the movable member 10 together with the movable member 10 by the force of the flowing water W by the blade rotation preventing means (the prismatic member 14 and the caster 26). Rotation to the center can be prevented. Accordingly, the posture of each wing member 10 with respect to the flowing water W can be stabilized.

  In the fluid power unit 2 according to the embodiment described above, the upper limit of the angle of attack of each blade member 20 can be adjusted by the stopper 13. By setting the upper limit of the angle to be relatively large and receiving a large amount of flowing water W by each wing member 20, it is possible to generate a force with a high priority to the drag. On the other hand, when applied to the relatively fast flowing water W, the upper limit of the angle of attack can be set relatively small to generate a force with a high lift priority. Therefore, it is possible to efficiently extract running water energy according to the flow situation.

Moreover, in the hydroelectric generator 1 which concerns on embodiment described above, the flowing water energy in the wide area | region of the depth direction of the flowing water W of the water channel F can be taken out efficiently, and can be converted into electrical energy. In the hydraulic power unit 1 according to this embodiment, is disposed above the water surface S _F running water W of canal F most of the members constituting the fluid type power unit 2 (the movable member 10 and the rotary member 30) Therefore, it is possible to avoid contact with water, thereby reducing the chance of failure of the apparatus and extending the useful life.

  In the above embodiment, each wing member 20 is arranged so as to generate a force in the width direction of the irrigation channel F (left and right direction in FIGS. 1 to 3), and the left and right direction (horizontal direction) of the movable member 10. Although the example which implement | achieved the reciprocating motion in was shown, the arrangement | positioning of each wing member 20 and the direction of the reciprocating motion of the movable member 10 are not restricted to this. For example, each wing member 20 may be arranged so as to generate a force in the depth direction (vertical direction in FIGS. 2 to 4) of the flowing water W of the irrigation channel F, and the reciprocating motion in the depth direction of the movable member 10 may be realized. it can. Moreover, although the example which installed the hydroelectric generator 1 in the water channel F was shown in the above embodiment, the hydroelectric generator 1 can also be installed in a river or the sea.

  Moreover, in the above embodiment, the casters 25 are arranged at the end portions of the connecting members 23 that connect the wing members 20 (near the front edge 20a of the wing members 20 located at both ends), and the elastic members 15 are attached to the casters 25. In the above example, the angle of attack of each wing member 20 is reversed, but the elastic member 15 is directly brought into contact with the front edge 20a of the wing member 20 located at both ends without using the casters 25. Thus, the angle of attack of each wing member 20 can be reversed.

  Moreover, in the above embodiment, although the example which employ | adopted a pair of plate-shaped elastic member 15 arrange | positioned mutually parallel as an angle-of-attack reversing means was shown, the structure and shape of the elastic member 15 are this. It is not limited. Moreover, although the example which employ | adopted the elastic member as an angle-of-attack reversing means was shown in the above embodiment, the same function (It generate | occur | produces in each blade member 20 by reversing the angle of attack of each blade member 20 with respect to the flowing water W. Any configuration may be adopted as long as the configuration achieves the function of reversing the force to achieve the reciprocating motion of the movable member 10). For example, immediately before reaching the position farthest from the center of the reciprocating motion of the movable member 10, fluid supply means configured to supply flowing water locally toward the front edge 20a of each wing member 20 (for example, FIG. A curved plate 16) having a C-shape in a plan view indicated by a broken line in FIG.

  Moreover, although the example which applied this invention to the hydroelectric generator 1 was shown in the above embodiment, the fluid type power unit which concerns on this invention can also be applied to a wind power generator.

1 ... Hydroelectric power generator (fluid power generator)
2 ... Fluid power unit 3 ... Generator 10 ... Movable member 11 ... Cylindrical member (fixed shaft)
12 ... Bearing 13 ... Stopper (attack angle adjusting means)
14 ... prismatic member (wing rotation prevention means)
15. Elastic member (attack angle reversing means)
16 ... curved plate (fluid supply means, angle of attack reversing means)
DESCRIPTION OF SYMBOLS 20 ... Wing member 20a ... Front edge 20b ... Rear edge 21 ... Blade rotation axis 26 ... Caster (blade rotation prevention means)
30 ... Rotating member 31 ... Rotating shaft 40 ... Connecting columnar member (power conversion means)
A: Distance from blade rotation shaft to blade member leading edge B ... Distance from blade rotation shaft to blade member trailing edge _F : Water channel SF: Water surface of running water W: Water flow (fluid)

Claims (12)

A movable member configured to reciprocate along a fixed axis extending in a direction substantially perpendicular to a predetermined flow of fluid;
An angle of attack with respect to the flow is changed by being rotatably attached to the movable member via a blade rotation shaft extending in a direction substantially perpendicular to the flow and the extending direction of the fixed shaft. At least one wing member configured;
Angle-of-attack reversing means for reversing the force generated by the wing member by changing the angle of attack of the wing member with respect to the flow from positive to negative or from negative to positive;
A rotating member that rotates about a rotating shaft extending in a predetermined direction;
Power conversion means for converting the reciprocating motion of the movable member into the rotational motion of the rotating member ,
The blade rotation shaft is disposed on or near the chord of the wing member,
Distance from the blade pivot axis to the front edge of the wing member, ing is set to be longer than the distance from the blade pivot axis to the trailing edge of the wing member,
Fluid power unit. The movable member is a cylindrical member having a predetermined length in a reciprocating direction,
The fluid power unit according to claim 1, wherein a plurality of the wing members are arranged along a length direction of the cylindrical member, and the wing members are interlocked. The distance from the blade rotation axis to the leading edge of the wing member is set to be within a range of 1.2 to 1.5 times the distance from the blade rotation axis to the trailing edge of the wing member. The fluid type power unit according to claim 1 or 2 . With increasing the wing tip from the blade root side of the blade member, the position of the leading edge of the wing member is configured to change gradually in the direction of the flow, in any one of claims 1 3 The fluid power unit as described. The fixed shaft is a cylindrical member fixedly arranged so as to extend in a direction substantially perpendicular to the flow,
The movable member is a cylindrical member that is slidably disposed on the outer periphery of the columnar member via a bearing,
The blade member is formed by wings rotation inhibiting means for inhibiting provided from being rotated around the said cylindrical member with said tubular member, fluid type power device according to any one of claims 1 to 4 . The fluid power unit according to any one of claims 1 to 5 , further comprising an angle-of-attack adjusting unit that sets an upper limit of an angle of attack of the wing member. The fluid power unit according to claim 6 , wherein the angle-of-attack adjusting means sets the upper limit of the angle of attack of the wing member to 45 degrees. A movable member configured to reciprocate along a fixed axis extending in a direction substantially perpendicular to a predetermined flow of fluid;
An angle of attack with respect to the flow is changed by being rotatably attached to the movable member via a blade rotation shaft extending in a direction substantially perpendicular to the flow and the extending direction of the fixed shaft. At least one wing member configured;
Angle-of-attack reversing means for reversing the force generated by the wing member by changing the angle of attack of the wing member with respect to the flow from positive to negative or from negative to positive;
A rotating member that rotates about a rotating shaft extending in a predetermined direction;
Power conversion means for converting the reciprocating motion of the movable member into the rotational motion of the rotating member;
With
The angle-of-attack reversing means prevents the movement of the leading edge of the wing member and forcibly rotates the wing member immediately before the movable member reaches a position farthest from the center of reciprocation. Which reverses the angle of attack,
The angle-of-attack reversing means is configured to supply fluid locally to the leading edge of the wing member immediately before reaching the position farthest from the center of the reciprocating motion of the movable member. Is,
Flow body type power device. The fluid is flowing water of a predetermined river or irrigation channel,
The said wing member is arrange | positioned so that the force in the depth direction of the said flowing water may be generate | occur | produced, The reciprocating motion in the said depth direction of the said movable member is implement | achieved as described in any one of Claim 1 to 8 Fluid power unit. The fluid is flowing water of a predetermined river or irrigation channel,
The blade member is used for realizing the reciprocating movement in the width direction of the movable member is arranged to generate a force in the width direction of the river or canal, to any one of claims 1 to 8 The fluid power unit as described. A fluid power unit according to any one of claims 1 to 10 ,
A generator for generating electric power by rotational movement of the rotating member of the fluid power unit;
A fluid type power generator. At least a part of the wing member of the fluid power unit is disposed inside running water of a predetermined river or irrigation channel,
The fluid power generation device according to claim 11 , wherein the movable member, the rotating member, and the power conversion unit of the fluid power device are disposed above a water surface of the flowing water.

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