JP2011094487A - Fluid energy recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid energy recovery device which efficiently recovers fluid energy by reducing reduction in a flow speed of fluid. <P>SOLUTION: This fluid energy recovery device includes a casing 12 having a flow passage 13 penetrating through an outlet side opening part 12b from an inlet side opening part 12a, a pair of rotary blades 10 and 11 having a plurality of blade parts 3 in the flow passage 13, and a recovery part 4 for recovering the rotational energy of the pair of rotary blades 10 and 11. The casing 12 is provided with a fluid guide part 14 in which the longitudinal-sectional area reaching a pair of rotary blade sides 14b from the inlet side opening part side 14a of the flow passage 13, reduces toward the pair of rotary blades 10 and 11 and a pair of fluid conducting plates 15 arranged so as to partition the inside of the fluid guide part 14 in the same direction as the flowing direction of the fluid of the flow passage 13. The interval between the pair of fluid conducting plates 15 is formed wider in an interval H2 up to the pair of rotary blades 10 and 11 from the inlet side opening part 12a than the interval H1 of the inlet side opening part side end 15a and the interval H3 of a pair of rotary blade side ends 15b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fluid energy recovery apparatus capable of efficiently recovering fluid energy by reducing a decrease in fluid flow velocity.

  A conventional fluid energy recovery device has a water passage that penetrates from a water inlet side opening toward a water discharge side opening, and is integrally formed with a casing member that is submerged in water in which a flow is generated, and each rotary shaft. A pair of rotating blades having a plurality of blade portions fixed and disposed in the water channel of the casing member, a generator provided on one end side of the rotating shaft, and a water inlet side opening of the casing member, And a water flow speed increasing portion formed so as to gradually decrease the area of the opening end toward the downstream side (see, for example, Patent Document 1).

JP 2007-177797 A

  The conventional fluid energy recovery device includes a water flow speed increasing portion that gradually decreases the area of the opening end toward the downstream side. There was a problem that energy recovery efficiency was reduced.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a fluid energy recovery device capable of improving the recovery efficiency of fluid energy by reducing the decrease in fluid flow velocity. To do.

The present invention has a flow path that penetrates from the inlet opening to the outlet opening, and a casing that is used by immersing the flow path in a fluid;
A pair of rotor blades having a plurality of blade portions disposed in the flow path of the casing;
A recovery unit provided on the upper side of the pair of rotor blades and recovering the rotational energy of the rotor blades obtained by receiving fluid energy at the blade portion;
In the casing, a fluid guide portion whose longitudinal cross-sectional area from the inlet side opening portion side of the flow path to the pair of rotor blades becomes smaller toward the pair of rotor blades, and
A pair of fluid guide plates arranged to partition the inside of the fluid guide portion in the same direction as the flow direction of the fluid in the flow path,
The distance between the pair of fluid guide plates is formed such that the distance between the inlet opening and the pair of rotor blades is wider than the distance between the inlet side opening end and the pair of rotor blade end.

The fluid energy recovery device of this invention has a flow path that penetrates from the inlet opening to the outlet opening, and a casing that is used by immersing the flow path in the fluid;
A pair of rotor blades having a plurality of blade portions disposed in the flow path of the casing;
A recovery unit provided on the upper side of the pair of rotor blades and recovering the rotational energy of the rotor blades obtained by receiving fluid energy at the blade portion;
In the casing, a fluid guide portion whose longitudinal cross-sectional area from the inlet side opening portion side of the flow path to the pair of rotor blades becomes smaller toward the pair of rotor blades, and
A pair of fluid guide plates arranged to partition the inside of the fluid guide portion in the same direction as the flow direction of the fluid in the flow path,
Since the gap between the pair of fluid guide plates is formed such that the gap between the inlet opening and the pair of rotor blades is wider than the gap between the inlet opening side edge and the pair of rotor blade side edges,
Since the fluid flows between the pair of fluid guide plates and the flow is rectified by the pair of fluid guide plates in the fluid guide portion, it is possible to reduce fluid flow velocity and efficiently recover the fluid energy.

It is a top view which shows the structure of the fluid energy recovery apparatus of Embodiment 1 of this invention. It is the side view and front view which show the structure of the fluid energy recovery apparatus shown in FIG. It is a rear view which shows the structure of the rotary blade of the fluid energy recovery apparatus shown in FIG. It is a figure for demonstrating the flow of the fluid of the fluid energy recovery apparatus shown in FIG. 1, and the conventional fluid energy recovery apparatus.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. 1 is a top view showing the configuration of a fluid energy recovery apparatus according to Embodiment 1 of the present invention, FIG. 2 is a side view and a front view showing the configuration of the fluid energy recovery apparatus shown in FIG. 1, and FIG. FIG. 4 is a diagram for explaining the flow of fluid between the fluid energy recovery device shown in FIG. 1 and the conventional fluid energy recovery device.

  In the figure, there is a flow path 13 penetrating from the entrance side opening 12a to the exit side opening 12b, and the casing 12 is used by immersing the flow path 13 in the fluid, and is disposed in the flow path 13 of the casing 12. A pair of rotor blades 10 and 11 having a plurality of blade portions 3 and the rotational energy of the rotor blades 10 and 11 obtained by receiving fluid energy at the blade portion 3 provided on the upper side of the pair of rotor blades 10 and 11. And a recovery unit 4 for recovering. The casing 12 includes a fluid guide portion 14 having a longitudinal cross-sectional area that decreases from the inlet opening 12a side of the flow path 13 to the pair of rotor blades 10 and 11 toward the pair of rotor blades 10 and 11. A pair of fluid guide plates 15 are formed so as to partition the inside of the fluid guide portion 14 in the same direction as the flow direction of the fluid in the flow path 13.

  The distance between the pair of fluid guide plates 15 is the distance H2 between the inlet opening 12a and the pair of rotor blades 10, 11 from the distance H1 of the inlet opening end 15a and the distance H3 of the pair of rotor blade ends 15b. Is widely streamlined. Further, the fluid guide plate 15 is formed so that the pair of rotor blade side ends 15 b reach between the pair of rotor blades 10 and 11. The fluid guide 14 and the fluid guide plate 15 are formed such that the height h1 of the inlet side openings 14a and 15a is higher than the height h3 of the rotor blades 10 and 11, and the pair of rotor blade ends 14b and 15b. Heights h2 and h3 are formed at the same height as the height h4 of the rotary blades 10 and 11.

  And each rotary blade 10 and 11 is each comprised as follows, as shown in FIG. An upper plate 1 that is formed to be rotatable around a first center point X and is formed of a disk, and a first center point X and a second center point Y that are parallel to the upper plate 1 and parallel to the upper plate body 1. Are arranged so as to be opposed to each other, and are formed so as to be rotatable about the second center point Y. The lower plate 2 has an opening 2a at the center of the disk, and the upper plate 3 has an upper end 3a. Has a plurality of blade portions 3 each having a lower end 3 b fixed to the lower plate 2 at equal intervals in the circumferential direction of the upper plate 1 and the lower plate 2. The blade 3 is formed in a semicircular cross section so that it can easily receive fluid. And each blade | wing part 3 is arrange | positioned so that this semicircular recessed direction may turn into the same direction in the circumferential direction.

  And it is formed so that fluid may flow between the pair of rotor blades 10 and 11. Therefore, the blade portions 3 of the pair of rotor blades 10 and 11 are semicircular in a direction in which the rotor blades 10 are in the direction of arrow B and the rotor blades 11 are in the direction of arrow A, and can receive fluid in each direction. The shape is arranged. However, this shape is not limited to this, and any other shape may be used as long as it can receive a fluid. The fluid energy recovery device can be used according to the strength of the fluid used. It is determined as appropriate.

  In the fluid energy recovery apparatus of the first embodiment configured as described above, the flow path 13 of the casing 12 is immersed in a river or the like. Then, water as a fluid flows through the flow path 13. At this time, water flows into the fluid guiding portion 14 on the inlet side opening 12 a side of the casing 12. The water is formed in a tapered shape in which the fluid guide portion 14 has a longitudinal cross-sectional area from the inlet opening 12a side to the pair of rotor blades 10 and 11 that decreases toward the pair of rotor blades 10 and 11. Therefore, they are collected between the pair of rotor blades 10 and 11 and flow. Further, in the fluid guide portion 14, water flows between the pair of fluid guide plates 15, and the water flows between the pair of rotor blades 10 and 11. As the blade portions 3 of the pair of rotor blades 10 and 11 are rotated by receiving the flow of water, the upper plate 1 and the lower plate 2 are centered on the first and second center points X and Y. Rotate to. The rotational energy of the upper plate 1 is recovered by the recovery unit 4 to generate power. And water is discharged | emitted from the exit side opening part 12b of the casing 12. FIG.

  Under the present circumstances, since the fluid guide plate 15 exists in this invention, it can suppress that the speed | rate of the fluid which passes between a pair of rotary blades 10 and 11 reduces. This will be described with reference to FIG. 4A is a cross-sectional view of a conventional fluid energy recovery device, and FIG. 4B is a cross-sectional view of the fluid energy recovery device of the present invention. The conventional fluid energy recovery device of FIG. 4A does not include the fluid guide plate 15, and the other configuration is the same as that of the fluid energy recovery device of the first embodiment. Omitted.

  In the case of the configuration of the conventional fluid energy recovery apparatus as shown in FIG. 4A, the flow of fluid in the fluid guide 14 is concentrated at the center of the fluid guide 14 as indicated by white arrows. And reaches between the pair of rotor blades 10 and 11. In this way, all the fluid flows are concentrated in the center, so that the fluids collide and reduce the fluid flow velocity and pressure. Thereby, the fluid energy of the rotary blades 10 and 11 is reduced, and the recovery of fluid energy is reduced.

  On the other hand, in the case of the configuration of the fluid energy recovery apparatus of the present invention as shown in FIG. 4B, the flow of the fluid in the fluid guide 14 is on the side wall of the fluid guide 14 as indicated by white arrows. It flows along and reaches between a pair of rotary blades 10 and 11. In addition, the flow of fluid in the pair of fluid guide plates 15 proceeds substantially linearly without depending on the flow of other fluids in the fluid guide 14 as indicated by the black arrows, and the pair of rotor blades. Between 10 and 11. Thus, the distance between the pair of fluid guide plates 15 is from the distance H1 between the inlet opening side end 15a and the distance H3 between the pair of rotor blade end 15b from the inlet opening 12a to the pair of rotor blades 10 and 11. Is widely streamlined, the flow of the white arrow of the fluid guide portion 14 is once shifted to the side wall side of the fluid guide portion 14 and rectified, and finally the pair of rotor blades 10, It flows in between 11. For this reason, it can prevent that the flow velocity and fluid pressure of a fluid reduce compared with the conventional case. Further, the fluid flowing between the pair of fluid guide plates 15 reaches between the pair of rotor blades 10 and 11 with almost no reduction in flow velocity and fluid pressure. As a result, the fluid energy of the rotor blades 10 and 11 can be reduced almost without reduction, and the fluid energy can be recovered almost without reduction.

  Note that the formation position of the gap H2 formed with a wide gap between the pair of fluid guide plates 15 from the entrance opening 12a may be other than the position shown in FIG. 1, for example, after the fluid flows in As long as the position is such that it is moved to the side wall side of the fluid guide portion 14 and rectified and finally flows between the pair of rotor blades 10 and 11, even if it is formed at another position, the above embodiment 1 can be obtained. In general, the formation position from the entrance side opening 12a of the interval H2 in which the interval between the pair of fluid guide plates 15 is wide is formed in the vicinity of the entrance side opening 12a. It is easy to transfer the fluid to the side wall side of the fluid guide part 14, and rectification can be performed reliably and efficiently.

  In the first embodiment, the pair of rotor blade side ends 15b of the pair of fluid guide plates 15 are formed at positions between the pair of rotor blades 10 and 11. However, the present invention is not limited to this. For example, if the fluid flowing out from the pair of rotor blade side ends 15b of the pair of fluid guide plates 15 flows between the pair of rotor blades 10 and 11, it may be formed at another position. The same effects as those of the first embodiment can be obtained.

  According to the fluid energy recovery device of the first embodiment configured as described above, the casing has a flow path that penetrates from the inlet opening to the outlet opening, and is used by immersing the flow path in the fluid. A pair of rotor blades having a plurality of blades disposed in the flow path of the casing, and rotational energy of the rotor blades provided on the upper side of the pair of rotor blades and obtained by receiving fluid energy at the blade portions A casing that includes a fluid guide that has a longitudinal cross-sectional area that decreases from the inlet opening side of the flow path to the pair of rotor blades toward the pair of rotor blades, and a fluid guide portion. A pair of fluid guide plates arranged so as to be partitioned in the same direction as the flow direction of the fluid in the flow path, and the distance between the pair of fluid guide plates is the distance between the inlet side opening side end and the pair of rotor blades From the gap between the edges to the pair of rotor blades The spacing between is formed wider by the velocity of the fluid guide fluid plate, it is possible to minimize the possible deceleration, thereby improving the fluid energy transmission efficiency.

  Further, since the fluid guide plate is formed so that the side ends of the pair of rotor blades reach between the pair of rotor blades, the fluid flow velocity can collide without decelerating to the vicinity of the pair of rotor blades. Therefore, the fluid energy transmission efficiency is further improved.

  In addition, the fluid guide portion and the fluid guide plate are formed such that the height of the inlet opening side end is higher than the height of the pair of rotor blade side ends, and the height of the pair of rotor blade side ends is the same as the height of the pair of rotor blades. Since the flow rate of the fluid can be collected in the rotor blades, the fluid energy transmission efficiency is further improved.

  Further, the rotor blade is configured so that the upper plate formed to be rotatable around the first center point is parallel to the upper plate, and the first center point and the second center point are opposed to each other. And a lower plate formed to be rotatable about a second center point. The blade portion has an upper plate fixed to the upper plate and an upper plate fixed to the lower plate and the lower plate fixed to the lower plate. Since a plurality of plates are formed in the circumferential direction of the plate body, since there is no main shaft between the upper plate body and the lower plate body, there is no obstruction of the fluid flow by the main shaft, and the fluid energy transmission efficiency is further improved.

  In the first embodiment, an example in which a rotor blade having no main shaft is used has been described. However, the present invention is not limited to this example. Can be reduced. Therefore, the shape of the rotor blade can be selected as appropriate according to the flow rate of the fluid.

DESCRIPTION OF SYMBOLS 1 Upper plate body, 2 Lower plate body, 2a Opening part, 3 Blade | blade part, 3a upper end, 3b lower end, 4 Collection | recovery part, 10,11 Rotary blade, 12 Casing, 12a Inlet side opening part,
12b Outlet opening, 13 channel, 14 fluid guide,
14a, 15a Inlet side opening end, 14b, 15b Outlet side opening end, 15 Fluid guide plate, H1, H2, H3 spacing, h1, h2, h3, h4 height, X first center point,
Y Second center point.

Claims (4)

A casing having a flow path penetrating from the entry-side opening to the exit-side opening, and used by immersing the flow path in a fluid;
A pair of rotor blades having a plurality of blade portions disposed in the flow path of the casing;
A recovery unit provided on the upper side of the pair of rotor blades and recovering the rotational energy of the rotor blades obtained by receiving fluid energy at the blade portion;
In the casing, a fluid guide portion having a longitudinal cross-sectional area from the upper entry side opening side of the flow path to the pair of rotor blades decreases toward the pair of rotor blades;
A pair of fluid guide plates arranged to partition the fluid guide portion in the same direction as the direction of fluid flow in the flow path;
The gap between the pair of fluid guide plates is formed such that the gap between the inlet opening and the pair of rotor blades is wider than the gap between the inlet opening side edge and the pair of rotor blade side edges. A fluid energy recovery device. The fluid energy recovery apparatus according to claim 1, wherein the fluid guide plate is formed so that side ends of the pair of rotor blades reach between the pair of rotor blades. The fluid guide portion and the fluid guide plate are formed such that the height of the inlet opening side end is higher than the height of the pair of rotor blade side ends, and the height of the pair of rotor blade side ends is the pair of rotor blades. The fluid energy recovery device according to claim 1, wherein the fluid energy recovery device is formed at a height position similar to the height of the fluid energy. The rotor blade is
An upper plate formed to be rotatable around a first center point;
A lower plate that is arranged in parallel with the upper plate and is arranged so that the first center point and the second center point are opposed to each other, and is rotatable about the second center point; With
2. The blade portion according to claim 1, wherein a plurality of the blade portions are formed in a circumferential direction of the upper plate body and the lower plate body, each having an upper end fixed to the upper plate body and a lower end fixed to the lower plate body. The fluid energy recovery apparatus according to claim 3.

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