JP5550753B1 - Turbine for wave power generation and its assembling method and operating method - Google Patents

Abstract

[PROBLEMS] To simplify a turbine structure and a flow structure of an air flow to reduce manufacturing and installation costs, to improve maintenance and safety, and to improve turbine operation efficiency.
In a wave power generation turbine 25 for driving a generator of a wave power generation device 10, an air chamber 18 and an outside air are provided on the top of a cylindrical floating body and formed on a vibrating water column in the floating body. And a hollow disk-shaped intermediate partition assembly 40 stored in the turbine casing 35, a nozzle ring assembly 43 as a stationary blade installed on the outer peripheral side of the intermediate partition assembly 40, and the nozzle ring An air flow from the outside air and an air flow from the air chamber 18 are disposed on the outer peripheral portion of the impeller 27 and the nozzle ring assembly 43 which are installed facing the inner peripheral side of the assembly and are driven to rotate by the blown air flow. And an air flow control mechanism 39 for selectively switching the air flow, and the air flow introduced into the outer peripheral portion of the partition assembly 40 is guided as an inward flow in one direction through the nozzle ring assembly and the impeller. .
[Selection] Figure 5

Description

  The present invention relates to wave power generation technology for generating power using wave energy, and in particular, a wave power generation turbine that extracts wave energy as electric energy in cooperation with a power generation device by a wave energy conversion system. And an assembly method and an operation method thereof.

  In Japan, an oceanic country surrounded by the sea, wave energy is abundant in the sea, but it has not been used. Since wave energy is easy to obtain, research on various types of wave power generation using wave energy has been conducted in Japan and ocean countries. In fact, in the research of wave power generation at sea, safety measures are large, cost is high, and the landscape is damaged, wave power generation has not reached the diffusion stage and has not been put into practical use.

  Ocean power generation is clean energy friendly to the global environment and greatly contributes to the prevention of global warming. I think that if production costs can be reduced to a point close to the economics of conventional power generation methods such as thermal power, hydropower, wind power, and nuclear power, it will be a promising energy source in the future, and it can be used in earnest. .

A known wave energy type conversion system that takes out wave energy (wave) energy as electric energy is:
a) Overtopping pumping system (Tapered Channel System)
b) Oscillating Water Column System
c) Moving Body Type
It is classified into three.

  The current mainstream of these three methods is the oscillating water column method (hereinafter referred to as the OWC method) as schematically shown in FIG. In the oscillating water column type wave power generation device 1, a generator 4 driven by an air turbine 3 is installed on a cylindrical floating body 2 moored in seawater (underwater). The floating body 2 is maintained in a floating state in the vertical direction by a ballast (weight) (not shown) in water (underwater), and air is placed on the top side of the floating body 2 due to the buoyancy of the floating body 2 and the gravity of the generator 4 and the ballast. A chamber 5 is formed. In the air chamber 5, an air flow is generated between the inside and the outside of the air chamber 5 by the elevation of the sea (water) surface generated by the reciprocating motion of the water column (vibrating water column) in the floating body 2. The air turbine 3 is driven by this air flow.

  The generator 4 is rotationally driven by the driving of the air turbine 3, and wave energy accompanying the raising and lowering of the oscillating water column 6 is converted from the generator 4 into electric energy and taken out to the outside.

  Conventionally, in the air turbine 3 used for the OWC system, there are a “wave power generator” described in Patent Documents 1 and 2 and a “turbine for wave power generation” described in Patent Document 3.

  The wave power generation device described in Patent Document 1 uses a Wells turbine as a wave power generation turbine to simplify the structure by always keeping the rotation direction of the generator constant.

  In addition, the wave power generator described in Patent Document 2 uses a impulse type turbine having a constant rotation direction for an air turbine, and combines a floating nozzle that can move in the turbine rotation axis direction and a certain distance to simplify the structure and improve performance. It is intended to improve.

  Furthermore, in the turbine for wave power generation described in Patent Document 3, a hollow disk-shaped floating chest is provided in a turbine casing of an air turbine so as to be movable up and down between an ascending position and a descending position. A nozzle ring assembly as a stationary blade is provided on the outer peripheral side, and a radial type impeller as a moving blade is provided facing the inner peripheral side.

Japanese Patent Laid-Open No. 11-201014 JP 2008-95569 A JP 2011-74854 A

  The wave power generation device described in Patent Document 1 employs a wells turbine, and when trying to improve low starting torque characteristics and low efficiency characteristics with this wells turbine, it is necessary to install variable pitch guide vanes, and the mounting structure is There was a problem of increasing complexity and cost.

  The wave power generation device described in Patent Document 2 is a radial flow in which the airflow flowing into the impeller is not reversed, but there is a delay in the movement start time of the floating nozzle, which is an important component, and becomes a bottleneck in improving efficiency. ing.

  The wave power generation device described in Patent Document 2 is provided with a dedicated stationary blade that functions when the sea level rises and a stationary blade that functions when the sea level descends in a floating nozzle, which is an important component. When one of the two is acting to guide the air flow to the impeller, the other is located in a path for discharging the air after the impeller has been turned, so that it is an obstacle to exhaust. For this reason, the flow of the air flow is not smooth, the flow passage resistance of the exhaust passage is large, and it is difficult to improve the turbine drive efficiency, which is a problem in improving the power generation efficiency.

  Since the turbine for wave power generation described in Patent Document 3 is a structure in which a nozzle ring assembly of a stationary blade and a radial-type impeller of a moving blade are housed and assembled in a floating chest constituting an air stationary blade mechanism, Since there is difficulty in assembly, and because the floating chest as a lifting member that moves up and down in the turbine casing as a whole is housed in a hollow box-shaped floating chest, there is a problem that impact noise is generated, and the lifting member Troubles are likely to occur, and if trouble occurs, the turbine drive efficiency may be reduced for maintenance.

  The present invention has been made in consideration of the above-mentioned circumstances, and simplified the turbine structure and the air flow channel structure to reduce manufacturing and installation costs, and is excellent in maintainability and safety, and improved in turbine driving efficiency. An object of the present invention is to provide a turbine for wave power generation.

In order to solve the above-described problems, a wave power generation turbine according to the present invention is provided at the top of a cylindrical floating body in a wave power generation turbine that drives a generator of a wave power generation apparatus. an air chamber and the outside air is formed on the oscillating water column in the body communicates, a turbine casing assembled divisible, and the assembly to the turbine casing is fixed to upper and lower dividable hollow disk-like partition assembly A nozzle ring assembly as a stationary blade installed on the outer peripheral side of the inner partition assembly, and a turbine shaft that is installed facing the inner peripheral side of the nozzle ring assembly and is driven to rotate by the blown air flow and the impeller as blade rotating together, the vertically movable floating shutter installed on the outer peripheral side of the nozzle ring assembly, the air flow from the air flow and the air chamber from the ambient air An air flow control mechanism that selectively switches in and flows in, and the air flow that flows into the outer peripheral portion of the partition assembly is guided as an inward flow in one direction through the nozzle ring assembly and the impeller. It is characterized by this.

Further, in order to solve the above-described problems, a method for assembling a wave power turbine according to the present invention accommodates a lower cover disk in a lower body casing , and a lower partition disk on an inner peripheral wall of the lower body casing. A torus-shaped nozzle ring assembly is provided on the fitted lower partition disk, and an impeller assembly and a floating shutter are installed on the inner peripheral side and the outer peripheral side of the nozzle ring assembly, respectively. Cover the shutter, the nozzle ring assembly and the impeller assembly from above, cover the upper partition disk, place the upper cover disk on the upper partition disk, and place the upper partition disk on the inner peripheral wall of the upper casing of the main body. Fitting, both flange parts of the main body lower casing and main body upper casing Coupled together, an assembly wherein the assembling the turbine casing.

  Furthermore, in order to solve the above-mentioned problems, a method for assembling a wave power generation turbine according to the present invention is for wave power generation assembled on the ground by the wave power generation turbine assembly method according to claim 6. The turbine is transported by ship to a floating body installation place on the sea, the wave power turbine is detachably installed on the top of the floating body installed on the sea, and a generator is installed on the wave power turbine. It is an assembly method.

Furthermore, in order to solve the above-described problem, the wave power generation turbine operating method according to the present invention includes a wave power generation turbine installed at the top of a floating body on the sea, and flows into and out of the air chamber in the floating body. In the operation method of the turbine for wave power generation in which the sea level is raised and lowered by seawater and the vibrating water column moves up and down, the air flow in the air chamber is caused to rise by the rising of the vibrating water column accompanying the rise in the sea level, and the upper cover circle and the upper cover circle. The plate is pushed up to close the bottom outlet of the partition assembly assembled and fixed in the turbine casing , and the top outlet is opened, while the floating shutter of the air flow control mechanism is pushed up to The lower inlet of the assembly is opened, the upper inlet is closed, and the air flow in the atmosphere is controlled by the air flow control by the descending of the oscillating water column accompanying the sea level descent. The floating shutter is lowered to open the upper inlet of the partition assembly and close the lower inlet, while the upper cover disc and the lower cover disc are lowered to lower the partition assembly. The top outlet is closed, the bottom outlet is opened, and the air flow that flows into the inflow chamber from the lower inlet when the sea level rises, and the air flows into the inflow chamber from the upper inlet when the sea level falls The air flow is guided as an inward flow in one direction from the nozzle ring assembly as a stationary blade to an outflow chamber through an impeller as a moving blade, and rotates the turbine shaft.

  According to the present invention, the turbine structure and the air flow channel structure can be simplified and reduced in weight, can be configured in a compact cassette type, can reduce the production and installation costs, and can disassemble the wave power generation turbine. Can be assembled to improve maintainability.

  Also, when the sea level rises or falls, the air flow in the atmosphere flows into and out of the air chamber in the floating body, but the air flow passing through the nozzle ring assembly and impeller installed in the partition assembly is one-way inward flow. Rotating the impeller stably, the turbine shaft can be driven continuously and stably at a 100% operation rate 24/7, improving turbine operating efficiency and rotating the impeller. The direction can be designed uniformly and the degree of freedom in design is improved and simplified.

  Furthermore, since the turbine casing and the partition assembly are assembled in a separable manner, the assembly and disassembly of the partition assembly, the nozzle ring assembly as a stationary blade, and the impeller as a moving blade in the turbine casing are facilitated. Since it is simplified, manufacturing and installation costs can be reduced, and maintainability is improved.

  In addition, the air flow control mechanism can switch the air flow only by moving the floating shutter up and down in the inflow chamber of the partition assembly, and the floating shutter is stable without impact sound due to the action of the air flow. Can be moved up and down.

The figure which shows the simple principle of the wave power generation device of the conventional vibration water column system. The simple block diagram which shows the principle of the wave power generator provided with the turbine for wave power generation. Schematic explaining the change by the depth of the seawater (water) accompanying a wave motion. BRIEF DESCRIPTION OF THE DRAWINGS The embodiment of the turbine for wave power generation concerning the present invention is shown, and the simple lineblock diagram of the wave power generator provided with the turbine for wave power generation. BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment of the turbine for wave power generation which concerns on this invention is shown, and a longitudinal cross-sectional view when releasing the air in an air chamber in air | atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment of the turbine for wave power generation which concerns on this invention is shown, and the longitudinal cross-sectional view when flowing the air in air | atmosphere into an air chamber. FIG. 7 is a cross-sectional plan view taken along line VII-VII in FIG. 6. The perspective view which shows the radial flow type impeller with which the turbine for wave power generation of FIG. 5 and FIG. 6 is equipped. The longitudinal cross-sectional view when 2nd Embodiment of the turbine for wave power generation which concerns on this invention is shown, and the air in an air chamber is discharge | released in air | atmosphere. The 2nd Embodiment of the turbine for wave power generation concerning the present invention is shown, and the longitudinal section when air in the atmosphere is made to flow into the air chamber.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a wave power turbine according to the present invention will be described with reference to the accompanying drawings.

[Principle of wave power generation]
Before describing the embodiment of the turbine for wave power generation according to the present invention, the principle of wave power generation will be described.

  FIG. 2 is a schematic configuration diagram showing the power generation principle of the wave power generation apparatus 10 including the wave power generation turbine according to the present invention.

  As shown in FIG. 2, the wave power generation device 10 includes a floating body 11 that can be moored on the sea (water), and a generator 12 that serves as a power generation means disposed on the floating body 11. The floating body 11 is made of, for example, resin and has a long and narrow cylindrical shape, and is disposed in seawater. A buoyancy adjusting chamber 13 for obtaining buoyancy F is provided in the middle of the floating body 11, and the lower end portion of the floating body 11 is opened downward so that seawater can freely enter and exit. A ballast 14 as a weight for adjusting the gravity G of the floating body 11 is provided at the lowermost part of the floating body 11, and the ballast 14 stably holds the floating body 11 in a substantially vertical state. The ballast 14 is formed in an annular shape or an outer peripheral flange shape in order to efficiently suppress the vertical movement (elevation) of the floating body 11, while a sleeve-like protrusion 15 is suspended from the outer peripheral portion of the ballast 14.

  The upper end of the buoyancy adjusting chamber 13 of the floating body 11 is partitioned by a partition plate 16, and a plurality of openings 17 are formed on the side of the upper portion of the partitioned partition plate 16, and seawater enters and exits through the openings 17. The vibration water column 20 is configured. A portion above the water (sea) surface of the vibrating water column 20 in the floating body 11 constitutes an air chamber (air chamber) 18.

  The sea surface that partitions the air chamber 18 moves up and down with a required phase difference due to the amplitude of surrounding waves, and moves up and down the vibrating water column 20 in the floating body 11 at a predetermined cycle. In this way, the oscillating water column 20 is formed in the upper part of the floating body 11. The oscillating water column 20 in the floating body 11 is moved up and down at a predetermined period, for example, 7 seconds to 8 seconds. The lower part of the floating body 11, that is, the water column below the buoyancy adjusting chamber 13 does not move up and down, and forms a fixed water column 21.

  On the other hand, an air turbine 25 constituting a wave power generation turbine is disposed on the top of the floating body 11. The turbine shaft 26 of the air turbine 25 is connected to the rotating shaft of the generator 12 directly or via a coupling.

  In this wave power generation device 10, the floating body 11 is in the sea (water) so that the top of the floating body 11 protrudes upward from the sea surface by leaving a predetermined space in the air chamber 18 due to the balance between the buoyancy F and the gravity G. Installed. Also, when the water surface moves up and down as the waves move up and down, in the deep part of the water, as shown in FIG. 3, the water is almost stationary without being affected by the surface waves.

  In the deep part of the water, an annular or outer peripheral flange-shaped ballast 14 and an outer peripheral sleeve-like protrusion 15 are provided so that the resistance of the water in which the floating body 11 is moved up and down by the difference between the buoyancy F and the gravity G is increased.

  On the contrary, in the vicinity of the surface of the sea, as shown in FIG. 2, seawater enters and exits through the opening 17 into the floating body 11 by waves that move up and down. At this time, on the upper side of the floating body 11, it is formed in a cylindrical shape without unevenness so that the vertical force accompanying the elevation of seawater is minimized.

  When the wavelength is smaller than the depth of the water (seawater), each point on the water (sea) surface has a circular motion with a radius equal to the wave amplitude in the vertical plane, as shown in FIG. It is known that each point of water below the surface of the water also moves circularly, but its radius suddenly decreases as it enters from the surface of the water, and it is known that it hardly moves at a depth of about half a wavelength or more. For example, the amplitude of seawater near Japan is about 1.6 m, generally 1.8 m to 2.0 m on the Pacific side, and the amplitude on the Japan Sea side is smaller than that on the Pacific side.

  In the wave power generation device 10 shown in FIG. 2, the vertical movement of the floating body 11 due to the vertical force is substantially suppressed along with the vertical movement of the wave, and the floating body 11 tries to maintain the initially installed posture due to inertia. .

  Further, the seawater entering the upper space (air chamber) 18 of the floating body 11 has a sufficient opening area so that the fluid resistance in and out can be ignored. For this reason, the sea surface of the air chamber 18 fluctuates in the vertical direction as the waves move up and down, and the air turbine between the air chamber 18 and the outside air in the atmosphere relative to the floating body 11 accompanies the fluctuation. The air is exchanged through 25.

  That is, the surface of the floating body 11, that is, the surface of the oscillating water column 20 moves up and down due to the inflow and outflow of seawater, and the air in the air chamber 18 enters and exits outside (in the atmosphere) through the air turbine 25.

  The lower end of the floating body 11 is opened downward, and seawater can freely enter and exit the floating body 11. A ballast 14 for adjusting the gravity G of the floating body 11 is provided at the bottom of the floating body 11, and the ballast 14 can hold the floating body 11 in a substantially vertical state in the sea (underwater). The ballast 14 is formed in an annular shape or an outer peripheral flange shape in order to suppress the raising / lowering (up-and-down movement) of the floating body 11, and receives the assistance of the sleeve-like protrusion 15 as necessary.

  On the other hand, the top of the floating body 11 of the wave power generation apparatus 10 protrudes upward from the sea surface, and the top of the floating body 11 protruding above the sea surface is provided with an air turbine 25 constituting a turbine for wave power generation and the air turbine 25. A generator 12 is provided as power generation means that is rotationally driven. The electric power obtained by the power generation action of the generator 12 is taken out through a power cable (not shown).

  In this wave power generation device 10, the floating body 11 is installed in the sea so as to leave a predetermined space in the air chamber (air chamber) 18 by balancing the buoyancy F and the gravity G. Further, the ballast 14 is provided at the lower end of the floating body 11 so that the floating body 11 is stably kept stationary even when the water surface moves up and down with the vertical movement of the wave. The ballast 14 is preferably formed in an annular (ring or torus) shape or an outer peripheral flange shape.

  When the sea level of the air chamber 18 rises as the waves rise, the air in the air chamber 18 of the wave power generator 10 flows out from the upper end opening of the floating body 11. Further, when the sea level of the air chamber 18 descends as the waves descend, the air chamber 18 becomes negative pressure from the upper end opening of the floating body 11 and the outside air flows in. In the wave power generation device 10, the air turbine 25 is driven by the flow of air into and out of the air chamber 18, and the generator 12 is driven to rotate to generate power.

  On the other hand, in the air turbine 25, when air flows out from the air chamber 18 into the outside air, or when air (outside air) flows into the air chamber 18, the rotor blades 27 that are rotating blades are in any case. As will be described later, the rotation (turbine) is driven in an inward flow in the same direction. In the air turbine 25, the moving blades 27 are rotationally driven in the same direction by the air flow flowing into and out of the air chamber 18 as the waves move up and down.

  The rotational driving force of the air turbine 25 is transmitted to the generator 12 via the turbine shaft 26 to drive the generator 12 to rotate. Power generation is started by the rotational drive of the generator 12, and necessary electric power is extracted outside.

  This wave power generation device 10 can drive a wave power generation turbine to perform a power generation action in any case of wave up-and-down movement, and efficiently converts wave energy into electric energy 24/7. Can be converted to

[First Embodiment]
A wave power generator according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 4 is a block diagram schematically showing a wave power generation turbine provided in the wave power generation apparatus according to the present invention. The same components as those of the wave power generation device 10 shown in FIG. This wave power generation turbine constitutes a radial air turbine 25. The wave power generation device 10 including the air turbine 25 includes an elongated cylindrical floating body 11 formed of a resin material such as plastic or a steel material such as stainless steel.

  The floating body 11 is provided on the sea (water) so that it can be moored on land or a hull by a mooring cable, a wire, or a link member 30. The floating body 11 may be formed of a cylindrical housing fixed to the quay. When the casing is fixed, the fixed water column 21 and the ballast 14 are not necessary.

  The floating body 11 can be assembled by detachably connecting the cylindrical blocks 31, and the axial length can be adjusted by assembling a required number of cylindrical blocks 31 into a cylindrical shape. The floating body 11 has a diameter D of several tens of centimeters to several meters, preferably about 1 mφ, and an axial length L of several tens of meters, for example, about 20 m.

  A buoyancy adjustment chamber 13 for adjusting the buoyancy F is provided in the middle of the floating body 11, and the upper end portion of the buoyancy adjustment chamber 13 is partitioned by a bottomed cylindrical block or a partition plate 16.

  An air chamber 18 is formed on the upper part of the partitioned partition plate 16, while a plurality of openings 17 are formed in the circumferential direction on the side wall of the floating body 11, and seawater enters and leaves the floating body 11 through the openings 17. The oscillating water column 20 in which the sea surface (water surface) moves up and down is constituted.

  A wave power generator 10 is installed on the top of the floating body 11. The wave power generation device 10 is provided with a generator 12 as power generation means and a radial air turbine 25 constituting a turbine for wave power generation. The air turbine 25 is detachably installed on the top of the floating body 11 and fixed. A moving blade 27 fixed to the turbine shaft 26 is provided in the air turbine 25, and the rotation of the turbine shaft 26 is transmitted to the generator 12.

  The air turbine 25 detachably installed on the top of the floating body 11 is configured in a cassette type as shown in FIGS. The air turbine 25 has a turbine casing 35 installed on the top of the floating body 11. The turbine casing 35 is configured in a vertically divided structure from a cylindrical main body upper casing 36 with a top plate (lid) and a bottomed cylindrical main body lower casing 37. The main body upper casing 36 and the main body lower casing 37 are combined to constitute a turbine casing 35. The turbine casing 35 forms a chamber 38 inside the casing.

  In the turbine casing 35, as shown in FIGS. 5 and 6, an overall partition assembly 40 having a substantially hollow disk box shape as a whole is installed so as to be split into two vertically. The middle partition assembly 40 is configured by assembling an upper partition disk 41 and a lower partition disk 42 in the turbine casing 35 with a space therebetween, and a nozzle ring assembly 43 that constitutes a stationary blade is disposed on the outer peripheral side. The radial impeller 27 constituting the moving blade is disposed on the inner peripheral side, and is configured concentrically. The turbine casing 35 and the partition assembly 40 are integrally formed of a plastic material such as reinforced plastic or fiber reinforced resin, a fiber reinforced metal material, or a fiber reinforced composite material.

  In the upper partition disk 41, a cylindrical upper sleeve portion 41a that fits into the inner peripheral wall of the main body upper casing 36 is integrally provided on the outer peripheral side, and a boss-shaped cylindrical sleeve portion 41b is integrally provided in the central portion. Further, the lower partition disk 42 is integrally provided with a cylindrical lower sleeve portion 42a fitted to the inner peripheral wall of the main body lower casing 37 on the outer peripheral side and a boss-shaped cylindrical sleeve portion 42b at the central portion. The boss-shaped cylindrical sleeve portions 41 b and 42 b may be configured separately from the upper partition disk 41 and the lower partition disk 42.

  Further, in the hollow disk box-shaped middle partition assembly 40, the inlets 45 and 46 are provided along the circumferential direction at the outer peripheral portions of the upper partition disk 41 and the lower partition disk 42, respectively. A plurality of inflow ports 45 and 46 are formed along the circumferential direction of the upper partition disk 41 and the lower partition disk 42, respectively. The inlets 45 and 46 of the upper partition disk 41 and the lower partition disk 42 are selectively covered with a shuttering plate 47 as a floating shutter that can be moved up and down. The shutter ring plate 47 has a ring shape or a washer shape, and has a shutter function by floating up and down between the upper inlet 45 and the lower inlet 46, and either one of the inlets 45, 46 is provided. It is selectively blocked. The shuttering plate 47 is formed of a thin resin material and selectively switches the inflow direction of the air flow.

  In the partition assembly 40, an inflow chamber 51 is formed between the upper and lower inlets 45 and 46. The air flow control mechanism 39 is configured by the cooperation of the inlet 45 of the upper partition disk 41 and the inlet 46 of the lower partition disk 42 and the shuttering plate 47 as a floating shutter, which constitute the middle partition assembly 40.

  Further, the intermediate partition assembly 40 has a ring-shaped storage recess formed on the radially inner peripheral sides of the upper and lower inlets 45 and 46, respectively, and a nozzle ring constituting a stationary blade in the opposing storage recess The assembly 43 is stored and fixed.

  The nozzle ring assembly 43 is assembled integrally by arranging a large number of nozzle blades 50 in a row in the circumferential direction between a pair of nozzle ring upper plate 48 and nozzle ring lower plate 49. A large number of nozzle blades 50 are arranged at an equal pitch along the circumferential direction, as shown in FIG. Each nozzle blade 50 is counterclockwise at a required angle with respect to the radial direction from the nozzle inlet of the inflow (intake) chamber 51 on the outer peripheral side through the nozzle blade 50 to the nozzle outlet on the inner peripheral side in plan view. It arrange | positions so that it may face inward.

  Specifically, the nozzle ring assembly 43 constituting the stationary blade is swung counterclockwise inward in a plan view of FIG. 7 from the nozzle inlet side on the outer peripheral side toward the nozzle outlet side on the inner peripheral side. It is arranged such that a directional spiral air flow is produced.

  Further, facing the inner peripheral side of the nozzle ring assembly 43, a radial flow impeller 27 constituting a moving blade is rotatably provided. As shown in FIGS. 5 and 6, the impeller 27 is provided with a boss portion 64 as a rotor hub that is rotatably integrated with the turbine shaft 26 of the generator, and is housed in the partition assembly 40. The turbine shaft 26 is provided in the vertical direction at the center portion of the turbine casing 35, and is rotatably supported by the upper cylindrical sleeve portion 41b and the lower cylindrical sleeve portion 42b via a bearing 53, and an impeller assembly 68 is provided. Composed.

  In the radial flow type impeller 27, a torus-shaped or donut-shaped hollow portion is formed between the upper support disk 61 and the lower support disk 62 as an outflow chamber 54 on the inner peripheral side of the moving blade. Outflow ports 55 and 56 are respectively provided at the upper and lower portions of the outflow chamber 54. Opposite the upper and lower outlets 55 and 56, a top outlet 57 and a bottom outlet 58 are formed in the upper partition disk 41 and the lower partition disk 42 of the middle partition assembly 40, respectively. The top outlet 57 is selectively covered from above with an upper cover disk (disk) 59, while the bottom outlet 58 is selectively covered from below with a lower cover disk (disk) 60. The upper cover disk 59 and the lower cover disk 60 are guided by the cylindrical sleeve portions 41b and 42b in the turbine casing 35, and ascend and descend, and as shown in FIG. 60 closes the bottom outlet 58, the upper cover disc 59 moves up by the action of the air flow, and the upper outlet 55 and the top outlet 57 are opened. When the air flows in from the atmosphere, the upper cover disk 59 descends due to its own weight action and the wind pressure of the air flow, covers and closes the top outlet 57, and the lower cover disk 60 acts as a lower outlet 56 and The bottom outlet 58 is opened.

  Further, the impeller 27 as a moving blade is formed in a disk shape or a torus shape as a whole, and is provided to be rotatable around the turbine shaft 26. A large number of rotary blades 63 of the impeller 27 are arranged between the upper support disk 61 and the lower support disk 62, and are arranged on the inner peripheral side facing each nozzle blade 50 of the nozzle ring assembly 43 constituting the stationary blade. The The rotary blades 63 are arranged at equal pitches in the circumferential direction along the outer periphery of the impeller 27 so that the radially inner side faces the inner side in the clockwise direction with respect to the radial direction by a required angle in a plan view shown in FIG. Established. In addition, the impeller 27 is provided so that the air flow generates a swirling flow in the counterclockwise direction A in the plan view of FIG. 7.

  The radiant flow impeller 27 as a moving blade constitutes a hollow disk-like turbine rotor as a whole, and a rotary blade 63 facing the nozzle blade 50 is provided in the circumferential direction on the outer periphery of the disk-like turbine rotor. They are arranged at a pitch.

  As shown in FIG. 8, the impeller 27 has an upper support disk 61 and a lower support disk 62 integrally fixed to a central boss portion 64, and is both supported (both sides) by the upper support disk 61 and the lower support disk 62. Supported. The impeller 27 is configured in a rotor double-side support structure and is supported so as to be stably rotatable around the turbine shaft 26.

  On the other hand, a plurality of top openings 65 are formed at the top of the turbine casing 35 with a large opening area. A plurality of bottom openings 66 are formed at the bottom of the turbine casing 35 with a large opening area. Air in the atmosphere passes through the top opening 65 and the bottom opening 66 and flows into and out of the air chamber 18 in the floating body 11 shown in FIG. When the air turbine 25 causes the air in the air chamber 18 to flow into and out of the atmosphere, the air flow always flows in one direction from the outer stationary blade side to the inner moving blade side in the partition assembly 40 ( Inward flow). The turbine shaft 26 is rotationally driven by the rotation of the radial impeller 27, which is a moving blade, and the generator 12 is activated to rotate.

(Assembly of turbine for wave power generation)
Next, assembly of the wave power generation turbine 25 in the wave power generation device will be described.

  In the wave power generation turbine 25 of the wave power generation apparatus 10, the floating body 11 is installed on the sea via a mooring cable, but the assembly of the air turbine 25, which is a wave power generation turbine, is performed on the ground.

  When the air turbine 25 is assembled, a turbine casing 35, a partition assembly 40, a nozzle ring assembly 43 that is a stationary blade, a radial impeller 27 that is a moving blade, and the like are prepared.

  First, the main body lower casing 36 of the turbine casing 35 is installed on the ground. Then, the lower cover disc 60 is housed in the main body lower casing 37 and the lower partition disk 42 is inserted into the main body lower casing 37 from above. The lower partition disk 42 is fitted in the main body lower casing 37 and installed.

  Next, the nozzle ring assembly 43 that constitutes a stationary blade is accommodated in the lower casing disc 42 that is housed in the main body lower casing 37, and the radial impeller 27 that constitutes the moving blade is located on the inner circumference side. Install in each. A shutter ring plate 47 that is a ring-shaped floating shutter of the air flow control mechanism 39 is installed on the outer peripheral side of the nozzle ring assembly 43. The nozzle ring assembly 43 assembled in advance is set on the storage recess in the circumferential direction of the lower partition disk 42. The impeller 27 is also assembled with the turbine shaft 26 and the bearings 53, 53 in advance, and the impeller assembly 68 is set inside the nozzle ring assembly 43 and incorporated.

  The upper partition disk 41 is provided so as to cover the shutter ring plate 47, the nozzle ring assembly 43, and the radiant flow impeller 27 that are floating shutters installed on the lower partition disk 42 from above. Further, an upper cover disk 59 is installed on the upper partition disk 41 so as to cover the top outlet 57 of the upper partition disk 41, and the main body upper casing 36 is installed from above so as to store the upper partition disk 41. The turbine casing 35 is configured by fitting. The fitted turbine casing 35 is assembled by fastening the outer peripheral flange portions of the main body upper casing 36 and the main body lower casing 37 with fastening means (not shown) such as bolts and nuts, and the air turbine 25 is assembled. It is constructed integrally.

  In the assembled air turbine 25, an impeller 27 accommodated in a turbine casing 35 is supported so as to be rotatable around a turbine shaft 26. The air turbine 25 is installed such that the outer diameter of the impeller 27 is about several tens of cmφ to 1 mφ and the weight is about 40 kg to several tens kg, for example, about 50 kg. The air turbine 25 is a cassette type and is detachably installed on the top of the floating body 11.

  As indicated by arrows in FIG. 5, when the air flow flows into the turbine casing 35 from the air chamber 18 in the floating body 11 due to the rising of the oscillating water column 20 due to the sea level rise, the lower cover disk 60 is Due to the action, the bottom outlet 58 of the partition assembly 40 is closed, and the upper cover disk 59 is guided and pushed up by the cylindrical sleeve portion 41b against the gravitational action by the action of the air flow. The top outlet 57 of the partition assembly 40 is opened.

  Further, as shown in FIG. 6, when the oscillating water column 20 descends due to the sea level descent and the air flow from the outside air flows into the turbine casing 35, the upper cover disc 59 descends due to its own weight and air flow. Then, the top outlet 57 of the partition assembly 40 is closed. At this time, the lower cover disc 60 is similarly lowered to open the bottom outlet 58 of the partition assembly 40. The shutter ring plate 47, which is a floating shutter of the air flow control mechanism 39, descends along the inner peripheral wall of the turbine casing 35 by the action and weight of the air flowing in from the inflow port 45, and opens the upper inflow port 45. The inlet 46 of the lower partition disk 42 is covered, and the lower inlet 46 is closed.

  Therefore, in the air turbine 25, when the air flow flows out from the air chamber 18 (see FIG. 4) into the atmosphere as shown in FIG. The outlet 58 is closed. Therefore, the air flow in the air chamber 18 flows from the inflow chamber 51 through the nozzle ring assembly 43 and the rotary blade (impeller) 50 to the inner peripheral side as an inward flow in one direction, and the upper outlet 55 flows out into the atmosphere through the top outlet 57 and the upper opening 65 of the partition assembly 40.

  Further, when an air flow flowing into the air chamber 18 is generated as shown in FIG. 6, the top outlet 57 of the partition assembly 40 is closed and the bottom outlet 58 is opened. Further, the shuttering plate 47 opens the inlet 45 of the upper partition disk 41 and closes the inlet 46 of the lower partition disk 42. In this case, the outside air that rotationally drives the impeller 27 through the bottom outlet 58 of the partition assembly 40 mainly flows into the air chamber 18 through the outlets 56 and 58 and the bottom opening 66. .

  As shown in FIG. 5, the wave power generation apparatus 10 is used when the air in the air chamber 18 flows out into the atmosphere, and when the outside air flows into the air chamber 18 as shown in FIG. 6. Regardless of the direction of the air reciprocating flow (outflow / inflow) along the turbine shaft 26 direction, the airflow becomes a unidirectional inward flow from the stationary blade to the moving blade side in one direction, and the air turbine 25 It always rotates stably in a certain direction and is driven by a turbine.

  In this way, the turbine for wave power generation assembled on the ground includes a turbine casing 35 which is a main component, a partition assembly 40, a nozzle ring assembly 43 which is a stationary blade, an impeller 27 which is a moving blade, and The floating shutter 47 and the upper and lower cover disks 59 and 60 of the air flow control mechanism 39 can be made of a resin material such as plastic, for example, ABS resin, nylon resin, or polypropylene resin. In this case, the impeller 27 that is a moving blade may be formed of a light metal material such as titanium.

  For this reason, even if the turbine 25 for wave power generation has a diameter of the impeller 27 of about several tens of cm to 1 m, the overall weight can be reduced to several tens kg, for example, 60 kg or less, and the turbine for wave power generation. Since 25 is a cassette type and has a lightweight structure, it can be transported on a floating body 11 installed on the sea by a ship and can be easily attached to the floating body 11 in a detachable manner.

  Therefore, the wave power generation turbine 25 can be detachably installed on the floating body 11 with a cassette-type lightweight structure. Moreover, since the wave power generation turbine 25 has a light-weight structure, it can be easily transported, and maintenance can be easily and stably disassembled and repaired on the ground.

  Even if the wave power generation turbine 25 is installed on the floating body 11, it can be easily detached from the floating body 11. Therefore, the wave power generation turbine 25 can be composed of main components and an inexpensive resin material. Maintenance once a year or two years can be performed easily and easily.

(Operation of turbine for wave power generation)
Next, the operation of the wave power generation turbine provided in the wave power generation device 10 will be described.

  The wave power generation device 10 is used for wave power generation by converting wave energy (wave) energy based on vertical motion of sea waves into electric energy and functions as a wave energy conversion system. The wave power generation device 10 is detachably installed on a portion of the floating body 11 that floats on the sea.

  The wave power generation device 10 includes an air turbine 25 as a wave power generation turbine installed on the top of the floating body 11. The air turbine 25 is rotationally driven by an air flow generated by the entry and exit of air in an air chamber 18 formed in the upper part of the floating body 11, and the generator 12 is driven through the turbine shaft 26 to be used for power generation. Yes.

  This air turbine 25 uses the reciprocating flow of air generated between the inside and the outside (in the atmosphere) of the air chamber 18 by the vertical movement of the oscillating water column 20 (see FIG. 4) generated by the elevation of the sea surface. The air turbine 25 is rotationally driven by the air flow. That is, the air turbine 25 is rotationally driven using the air flow generated by the vertical movement of the oscillating water column 20.

  In FIG. 4, when seawater flows into the air chamber 18 in the floating body 11 through the opening 17 due to rising sea waves, the sea level (water surface) of the vibrating water column 20 in the air chamber 18 rises. As shown in FIG. 5, the lower cover disk 60 is pushed up by the action of the air flow generated by the sea level rise of the oscillating water column 20, and closes the bottom outlet 58 of the partition assembly 40, with a slight delay. The shuttering plate 47 of the air flow control mechanism 39 is also raised, and the shuttering plate 47, which is a floating shutter, is set at the raised position as shown in FIG. In this ascending position, the shuttering plate 47 is set so as to guide the air flow due to the sea level rise from the lower inlet 46 to the nozzle ring assembly 43, and from the inflow chamber 51 on the outer peripheral side, the nozzle ring assembly 43 which is a stationary blade. , And is guided as an inward flow (swirl flow) in one direction by the radial flow impeller 27 on the inner peripheral side which is a moving blade, and the impeller 27 is driven to rotate.

  Each nozzle port of the nozzle ring assembly 43 has a required air flow toward the outer periphery of the radial flow impeller 27 constituting the rotor blade, radially inward, specifically in a counterclockwise direction with respect to the radial direction. Blow out at an angle. By this blowing, the impeller 27 is rotated in the direction of arrow A (counterclockwise) in FIG. 7 to drive the turbine shaft 26 to rotate.

  The generator 12 is driven by the rotational drive of the turbine shaft 26 to be used for power generation. The electric power obtained by the power generation by the generator 12 is taken out through a cable (not shown).

  Further, the air flow that rotationally drives the impeller 27 as the moving blade subsequently passes through the top outlet 57 and the top opening 65 of the partition assembly 40 from the outlet 55 at the top of the impeller 27 as shown in FIG. After that, it is released into the atmosphere.

  When the upward movement of the oscillating water column 20 formed in the floating body 11 is stopped, the upper cover disk 59 slides downward so as to close the opening 57 of the partition assembly 40 by its own weight. When the outside air flows into the air chamber 18 (in a negative pressure state) via the air turbine 25, this downward stroke is facilitated by a pressing action by the action of the air flow and the negative pressure, as shown in FIG. In addition, the shuttering plate 47 of the air flow control mechanism 39 is smoothly guided and set to the lowered position, and the air flow from the outside air is guided to the inflow chamber 51 through the inflow port 45.

  When the sea surface of the oscillating water column 20 is further lowered in the state where the air flow is guided to the inflow chamber 51, the air chamber 18 becomes negative pressure, and the outside air passes through the case casing champ 38 from the top opening 65 of the turbine casing 37. The air is blown out from the top inlet 45 of the middle partition assembly 40 through the inflow chamber 51 and the stationary blade to the impeller 27 constituting the moving blade.

  The outside air (air flow) blown out to the impeller 27 is directed counterclockwise with respect to the radially inward direction as shown in FIG. 7, so that the impeller 27 of the moving blade is counterclockwise. To rotate the generator 12 through the turbine shaft 26.

  The outside air that rotationally drives the impeller 27 then passes from the impeller 27 shown in FIG. 6 through the outflow chamber 54 and flows into the air chamber 18 from the lower outlets 56 and 58 through the bottom opening 66 of the turbine casing 35. I'm damned.

  That is, the impeller 27, which is the moving blade of the air turbine 25, is used both when the air flow flows out from the air chamber 18 of the floating body 11 into the atmosphere and when the outside air flows into the air chamber 18 through the air turbine 25. 7, the impeller 27 is always rotated as an inward flow swirling in one direction indicated by the same arrow A. That is, the moving blade can always be driven to rotate in the direction of arrow A regardless of the elevation of the sea level.

  In this way, the air flow in the air chamber 18 of the floating body 11 is repeatedly flown in and out throughout the year due to the vertical movement of the wave, and the oscillating water column 20 is moved up and down with the amplitude of the wave and the required phase difference. . Even if the air flow flows in and out, the impeller 27 of the air turbine 25 is always driven to rotate in the same direction, so that the impeller 27 can be driven efficiently and efficiently.

  Furthermore, the wave power generation turbine 25 for driving the generator 12 of the wave power generation apparatus 10 is provided at the top of the cylindrical floating body 11. The turbine 25 for wave power generation is housed in the turbine casing 35 for communicating the air chamber 18 formed on the oscillating water column 20 in the floating body 11 with the outside air in the atmosphere, and is in a torus shape as a stationary blade. And an axial flow type impeller 27 driven to rotate by an air flow blown from the nozzle. The impeller 27 is provided integrally with the turbine shaft 26 and functions as a moving blade.

  A nozzle ring assembly 43 as a stationary blade is housed and fixed in the turbine casing 35. With respect to the nozzle ring assembly 43, the air flow control mechanism 39 is provided with only a shutter ring plate 47, which is a floating shutter, so as to be movable up and down in the turbine casing 35. The shuttering plate 47 of the air flow control mechanism 39 is provided on the inner peripheral wall of the turbine casing 35 between a rising position that covers the upper inlet 45 from below and a lower position that covers the lower inlet 46 from above in the turbine casing 35. It is guided and provided so that it can be raised and lowered.

  In the partition assembly 40, a shutter ring plate 47 of an air flow control mechanism 39 having a thin and lightweight ring structure is provided in the inflow chamber 51 in a horizontal direction so that an upper inlet 45 and a lower inlet 46 are selectively provided. Cover and partition. When the wave rises, the shuttering plate 47, which is a floating shutter, is pushed up by the air flow flowing in from the lower inlet 46 to cover and close the upper inlet 45. When the wave descends, the shuttering plate 47 having a thin and light structure descends due to the air flow from the atmosphere flowing in from the upper inlet 45 and its own weight, and covers and closes the lower inlet 46. In any case, the air flow control mechanism 39 is configured such that the partition assembly 40 is fixed in the turbine casing 35 only by moving the shutter ring plate 47, which is a floating shutter, up and down in the inflow chamber 51 of the partition assembly 40. Stored. The air flow control mechanism 39 selectively switches the inflow direction of the air flow, whether the air flow flows into the inflow chamber 51 of the partition assembly 40 from the upper inlet 45 or the lower inlet 46. ing.

  Further, since the partition assembly 40 has a static configuration fixed in the turbine casing 35, a dynamic mechanism that rises due to an air flow flowing out from the air chamber 18 or descends due to an air flow flowing into the air chamber is provided. not exist.

  Two cover disks 59 and 60 are provided on the top side and the bottom side of the partition assembly 40 so as to selectively cover the top and bottom outlets 57 and 58. The cover disks 59 and 60 are moved up and down prior to the movement of the shuttering plate 47 by their own weight and air flow, and the top outlet 57 or the lower outlet 58 that is the inner peripheral side opening of the partition assembly 40 is selected. Closed. The partition assembly 40 is housed and fixed in the turbine casing 35, and an unstable lifting operation is unnecessary.

  In this air turbine 25, when the shuttering plate 47 moves up and down and reaches the raised position, the bottom outlet 58 of the partition assembly 40 is blocked by the lower cover disk 60 that rises due to the air flow from the air chamber 18. (See FIG. 5). When the shuttering plate 47 is lowered and assumes the lowered position, the top outlet 57 of the partition assembly 40 is closed by the upper cover disk 59 that is lowered by the air flow from the outside (see FIG. 6). .

  Further, the wave power generation apparatus 10 uses the air turbine 25 including the fixed partition assembly 40 even when the air flow direction is reversed. Since the partition assembly 40 has a static configuration and does not need to be lifted and lowered, the degree of freedom of design is greatly increased, and highly efficient and efficient power generation is possible.

  Further, in the water column vibration type wave power generation apparatus 10 shown in FIG. 4, one or a plurality of wave power generation turbines 25 are mounted on each floating body 11 appropriately arranged or arranged, and each turbine casing 35 is mounted. The upper and lower inlets 45, 46 may be sequentially opened and closed by a floating shutter of the air flow control mechanism 39.

  In this case, the opening and closing control of the upper and lower inlets 45 and 46 is automatically performed sequentially according to the pressure fluctuation of the air chamber 18 of each floating body 11, and the turbine drive of the wave power generation turbine 25 is performed. The operation may be performed in a high efficiency region.

  In the wave power generation turbine 25 shown in the first embodiment of FIGS. 4 to 8, a floating shutter of the air flow control mechanism 39 is accommodated in a turbine casing 35 so as to be movable up and down by a required lifting stroke. The air flow control mechanism 39 is installed in the intermediate partition assembly 40 housed in the turbine casing 35 and fixedly installed so that the shuttering plate 47 can be raised and lowered in a floating state. A single nozzle ring assembly 43 serving as a stationary blade and a radiant flow type impeller 27 serving as a moving blade are accommodated in a partition assembly 40 having a static configuration.

  Conventionally, a floating chest that moves up and down individually includes a stationary blade that functions when the sea level rises and a stationary blade that functions when the sea surface descends. However, the wave power turbine 25 shown in FIGS. The number of nozzle ring assemblies 43 corresponding to the stationary blades may be one in the partition assembly 40 of the configuration, and the partition assembly 40 is fixedly installed in the turbine casing 35. May be the floating shutter 47 of the air flow control mechanism 39, which can reduce the weight and greatly simplify the turbine structure.

  The shuttering plate 47 of the air flow control mechanism 39 opens and closes in conjunction with the upper cover disc 59 and the lower cover disc 60 that cover the top outlet 57 and the bottom outlet 58 of the partition assembly 40 so as to be freely opened and closed. Operated. In this sense, the upper cover disk 59 and the lower cover disk 60 also constitute a part of the air flow control mechanism 39. The top outlet 57 of the partition assembly 40 is covered with an upper cover disk 59 that can be opened and closed automatically from above by the action of air flow and its own weight, and the bottom outlet 58 also has the action of air flow and its own weight. Is covered with a lower cover disk 60 that is automatically opened and closed from below by the action of.

  Therefore, as shown in FIG. 5, the wave power generation turbine 25 is configured such that when the sea level rises and the air in the air chamber 18 flows out, the shuttering of the air flow control mechanism 39 is performed by the air flow pressing action. Prior to the rise of the plate 47, the lower cover disc 60 is pushed up to close the bottom outlet (bottom opening) 58 of the partition assembly 40. Due to this blockage, the air flow control mechanism 39 is subjected to a large push-up action by the air flow, and the shuttering plate 47 rises smoothly and smoothly to the raised position. At this time, the upper cover disk 59 rises away from the top outlet (top opening) 57 of the partition assembly 40 by the air flow push-up action, and opens the top outlet 57 largely.

  Therefore, when the airflow flows out of the air chamber 18, the wave power generation turbine 25 moves inwardly through the partition assembly 40 and passes through the nozzle ring assembly 43 serving as a stationary blade. The radiant flow type impeller 27 as a blade is driven to rotate. After the impeller 27 is driven to rotate, the air flow passes smoothly from the outflow chamber 54 through the upper outlet 55 and the top outlet 57 of the partition assembly 40 to the atmosphere from the top opening 65 of the turbine casing 35 into the atmosphere. To be leaked. Since this air flow flows out into the atmosphere from the top opening 65 of the turbine casing 35, the flow path structure of the air turbine 25 is simplified.

  Moreover, when an air flow flows in into the air chamber 18, it is comprised as shown in FIG. In the air turbine 25, when the air in the atmosphere falls and the air in the atmosphere flows into the air chamber 18, an air flow acts on the upper cover disk 59 from above as shown in FIG. Due to the synergistic action, the upper cover disk 59 smoothly descends and automatically closes the top opening 57 of the partition assembly 40.

  Due to this blockage, the shuttering plate 47 which is a floating shutter of the air flow control mechanism 39 is smoothly and forcibly lowered by its own weight and air flow, and reaches the lowered position. At this time, the lower cover disk 60 drops away from the bottom opening 58 of the partition assembly 40 by the air flow pressing action and the falling action due to its own weight, and opens the bottom opening (outlet) 58.

  Therefore, the air flow passing through the air turbine 25 flows as an inward flow in the partition assembly 40 and is blown out from the nozzle ring assembly 43 serving as a stationary blade to rotationally drive the radial impeller 27 serving as a moving blade. Let This air flow is guided from the outflow chamber 54 to the air chamber 18 from the lower outlet 56 shown in FIG. 6 through the bottom outlet 58 of the partition assembly 40 and the bottom opening 66 of the turbine casing 35. When the sea level is lowered, the flow path structure of the air turbine 25 is remarkably simplified as in the case where the sea level is raised, and air in the atmosphere is smoothly and smoothly transferred to the air chamber 18 without receiving a large flow path resistance. Can flow into and out.

[Effect of the first embodiment]
In the turbine 25 for wave power generation shown in the first embodiment, a single nozzle ring assembly 43 can share a stationary blade that functions when the sea level rises and a stationary blade that functions when the sea level descends. Moreover, the nozzle ring assembly 43 is fixed together with the partition assembly 40 in the turbine casing 35 and does not need to be provided on the side of the air flow control mechanism 39 that moves up and down. Since the fixed nozzle ring assembly 43 is independent of the shutter ring plate 47 which is a floating shutter of the air flow control mechanism 39, the structure of the air flow control mechanism 39 is simplified and the weight is reduced.

  The shutter ring plate 47, which is a floating shutter of the air flow control mechanism 39, can be installed separately from the nozzle ring assembly 43, which is a stationary vane, and the weight of the air flow control mechanism 39 can be reduced. The air flow switching followability at the time of sea level rise and fall is quick and good. Further, since the nozzle ring assembly 43 constituting the stationary blade is installed in the fixed partition assembly 40, it becomes a static configuration and can improve the mechanical and physical strength of the stationary blade, and is mechanically durable. This improves the turbine operating efficiency.

  Further, the wave power generation turbine 25 can eliminate the stationary blades on the exhaust chamber side of the air flow exhausted from the radial flow impeller 27, thereby simplifying the turbine structure. In addition, the top opening 57 and the bottom opening 58 on the inner peripheral side of the inner partition assembly 40 are respectively provided with lightweight upper cover disk 59 and lower cover disk 60 that automatically open and close by their own weight and airflow action, The air flow discharged to the 27 exhaust chambers 54 can also be discharged from the top outlet 57 and the bottom outlet 58 of the partition assembly 40.

  Therefore, the wave power turbine can be reduced in weight by simplifying the flow path structure and turbine structure of the air flow, and can be constructed in a compact cassette type, thereby reducing manufacturing and installation costs. In addition, the turbine for wave power generation is composed of resin materials such as plastics to reduce the weight of the turbine, assembles it so that it can be disassembled, and makes it easy to install on the top of the floating body. Turbine operating efficiency can be improved.

[Second Embodiment]
9 and 10 illustrate a second embodiment of the wave power turbine according to the present invention.

  In the description of the wave power generation turbine shown in this embodiment, the same components as those shown in the first embodiment are denoted by the same reference numerals, and redundant description is omitted or simplified.

  The wave power generation turbine (air turbine) 25A shown in the second embodiment is the same as the wave type power generation turbine shown in the first embodiment in the configuration of the radial flow impeller 70 housed in the turbine casing 35. Unlike the turbine 25, other configurations are not substantially different. The air turbine 25A of the second embodiment is suitable for a wave having a relatively small amplitude, for example, an amplitude of about 2 m to 1.6 m or less.

  In the air turbine 25 </ b> A shown in FIGS. 9 and 10, an intermediate partition assembly 40 is stored and installed in a turbine casing 35 so as to be divided into two vertically. The intermediate partition assembly 40 is formed in a hollow disk shape as a whole and can be divided into two parts, and is fitted and fixed to the inner peripheral walls of the main body upper casing 36 and the main body lower casing 37 of the turbine casing 35 on the outermost peripheral side. The upper sleeve portion 41a and the lower sleeve portion 42a are integrally provided.

  The upper sleeve portion 41 a is integrally formed on the outer peripheral side of the upper partition disk 41 of the middle partition assembly 40, while a boss-like cylindrical sleeve portion 41 b is integrally provided at the center of the upper partition disk 41. The lower sleeve portion 42 a is integrally formed on the outer peripheral side of the lower partition disk 42 of the middle partition assembly 40, and a boss-shaped cylindrical sleeve portion 42 b is integrally provided at the center of the lower partition disk 42. . One cylindrical sleeve portion 41b rises from the center portion of the upper partition disk 41, while the cylindrical sleeve portion 42b of the lower partition disc falls from the center portion of the lower partition disk 42, and both cylindrical sleeve portions 41b and 42b are The turbine casing 35 is fitted into and fixed to the central openings formed in the upper and lower portions.

  Further, the middle partition assembly 40 is provided with a plurality of upper and lower inlets 45, 46 along the circumferential direction on the outer peripheral side of the upper partition disk 41 and the outer peripheral side of the lower partition disk 42. An inflow chamber 51 is formed between 45 and 46. The middle partition assembly 40 is provided with a nozzle ring assembly 43 constituting a stationary blade on the inner peripheral side of the inflow chamber 51. Further, on the inner peripheral side of the nozzle ring assembly 43, a radiant flow type impeller 70 constituting a moving blade is provided so as to be rotatable. The configuration of the nozzle ring assembly 43 is the same as that of the wave power generation turbine (air turbine) 25 shown in the first embodiment.

  The radiant flow impeller 70 that is a moving blade is configured to have a support structure that supports the rotary blade 73 on the blade tip side. The impeller 70 includes a boss portion 71 as a rotor hub provided integrally with the turbine shaft 26, a single disk-like support disk 72 provided integrally at the axial center of the boss portion 71, and a support disk. And a plurality of rotary blades 73 provided in the circumferential direction on both upper and lower sides of the outer peripheral side of 72. The support disk 72 is a central support rotor that is integrally provided at the center in the width direction of the boss 71 that is a rotor hub, and a large number of rotary blades 73 are arranged in the circumferential direction at a required pitch interval on the outer periphery of the support disk 73. Is done. Each rotary blade 73 is provided facing the inner peripheral side of the nozzle blade 50 of the nozzle ring assembly 43 as a stationary blade.

  In the radiant flow type impeller 70, an outflow chamber 75 is formed on the inner peripheral side of the rotary blade 73, and a support disk 72 having a plurality of openings 76 is disposed in the outflow chamber 75. The impeller 70 is integrally formed with the bearings 53 and 53 and the turbine shaft 26 by the fastening by the fastening means 67.

  The top outlet 57 and the bottom outlet 58 formed above and below the outflow chamber 75 formed on the inner peripheral side of the radial flow impeller 70 are the upper partition disk 41 and the lower partition disk of the intermediate partition assembly 40. 42 respectively.

  The upper cover disk 59 that selectively covers the top outlet 57 of the middle partition assembly 40 from above is guided by the cylindrical sleeve portion 41b of the upper partition disk 41 while the bottom outlet of the middle partition assembly 40 is guided. The lower cover disk 60 that selectively covers 58 from below is guided by the cylindrical sleeve portion 42 b of the lower partition disk 42 to be raised and lowered.

  A top opening 65 communicating with the atmosphere is provided at the top of the turbine casing 35, and a bottom opening 66 communicating with the air chamber 18 (see FIG. 4) of the floating body 11 is provided at the bottom of the turbine casing 35.

  Since the assembly of the wave power generation turbine is substantially the same as the wave power generation turbine configured in the first embodiment, the description thereof is omitted. The operation of the wave power generation turbine provided in the wave power generation apparatus 10A will be described.

  The wave power generation device 10 </ b> A includes an air turbine 25 </ b> A as a wave power generation turbine installed on the top of the floating body 11. The air turbine 25A is rotationally driven by an air flow entering and exiting the air chamber 18 above the floating body 11, and the generator 12 is driven via the turbine shaft 26 for power generation.

  The wave power generation turbine 25A acts as shown in FIG. 9 due to the rise in the sea level. Due to the air flow from the air chamber 18 of the floating body 11, the lower cover disk 60 is moved upward to cover and close the bottom opening 58 of the partition assembly 40 from below. Subsequently, the shuttering plate 47 which is a floating shutter of the air flow control mechanism 39 is moved upward, and the shuttering plate 47 is lifted by opening the inlet 46 of the lower partition disk 42, and the inlet of the upper partition disk 41. 41 is covered from below and closed.

  As a result, the air flow from the air chamber 18 flows into the inflow chamber 51 of the partition assembly 40 from the lower inlet 46, and then passes through the nozzle ring assembly 43, which is a stationary blade, to become a moving blade. The rotary blade 73 of the impeller 70 is rotationally driven by being guided by the radiant flow impeller 70 and turning inward. In the impeller 70, the rotary blade 73 is rotated counterclockwise in substantially the same manner as shown in FIG.

  The air flow that has rotated the impeller 70 is then guided to the outflow chamber 75, outflowed from the outflow chamber 75 into the chamber 38, and an upper cover disk 59 that covers the top outlet 57 of the partition assembly 40. When pushed up, the top outlet 57 is opened.

  Thus, the air flow as the swirling inward flow guided to the outflow chamber 75 by rotationally driving the inner peripheral airflow type impeller 70 as the moving blade from the outer peripheral nozzle ring assembly 43 as the stationary blade. Is discharged from the outlet champ 75 through the top outlet 57 of the partition assembly 40 and the chamber 38 into the atmosphere from the top opening 65 of the turbine casing 35.

  On the other hand, the turbine shaft 26 is rotationally driven by the rotation of the radial impeller 70. The rotational drive of the turbine shaft 26 is transmitted to the generator 12, and the generator 12 is driven to generate power.

  In addition, the wave power generation turbine 25A acts as shown in FIG. At this time, a negative pressure acts on the air chamber 18 in the floating body 11 due to the sea level descent, while an atmospheric pressure acts on the partition assembly 40 of the turbine casing 35 from above. The upper cover disk 59 in the turbine casing 35 is guided and lowered by the cylindrical sleeve portion 41b of the upper partition disk 41 by the action of atmospheric pressure and its own weight, and covers the top outlet 57 of the middle partition assembly 40 from above. Block it. At this time, the shuttering plate 47, which is a floating shutter of the air flow control mechanism 39, is lowered along the inner peripheral wall of the turbine casing 35 by the action of atmospheric pressure and its own weight, and the upper inlet 45 of the partition assembly 40 is made to flow. While opening, the lower inlet 46 is covered and closed from above.

  On the other hand, the lower cover disc 60 covering the bottom outlet 58 of the partition assembly 40 is lowered from the bottom outlet 58 and opened by its own weight and air flow.

  Thus, air flowing from the top opening 65 of the turbine casing 35 through the upper inlet 45 of the partition assembly 40 into the inlet champ 51 continues to the nozzle ring assembly which is a stationary blade. 43 is guided as an inward flow swirling to the inner circumferential side radial flow impeller 70 which is a moving blade, and the impeller 70 is driven to rotate.

  The rotationally driven air flow of the impeller 70 is then partially passed from the outflow chamber 75 through the opening 76 of the support disk 72 and the rest directly from the bottom outlet 58 of the partition assembly 40 to the bottom opening 66 of the turbine casing 35. After that, it flows into the air chamber 18 of the floating body 11.

  On the other hand, the turbine shaft 26 is rotationally driven by the rotation of the radiant flow impeller 70 to drive the generator 12 for power generation.

[Effects of Second Embodiment]
The wave power generation turbine 25A in the wave power generation device 10A is configured such that when the sea surface rises or falls and an air flow enters and leaves the air chamber 18 of the floating body 11, the stationary vanes on the outer peripheral side in the partition assembly 40. To the inner peripheral side of the rotor blade, the inward flow swirls in one direction. For this reason, the flow of the air flow in the rotor in the radial flow impeller 25A of the turbine for wave power generation is always an inward flow in one direction, and the degree of freedom in designing the blades of the stationary blade and the moving blade can be improved.

  The nozzle ring assembly 43 that is a stationary blade and the radial flow impeller 70 that is a moving blade are provided in a partition assembly 40 that is fixed in the turbine casing 35. The impeller 70 can be provided with high positional accuracy, and stable blade performance can be exhibited.

  Further, the air flow control mechanism 39 provided in the partition assembly 40 can be moved up and down by being guided by the inner peripheral wall of the turbine casing 35 by a shutter ring plate 47 of a thin and lightweight floating shutter type. The flow direction can be switched smoothly and without generating an impact sound.

  Further, the turbine casing 35, the partition assembly 40, the nozzle ring assembly 43 as a stationary blade, and the radial impeller 25A as necessary can be integrally formed by resin molding such as plastics by injection molding or the like. And weight reduction, and the effect of preventing corrosion by seawater.

10, 10A Wave power generator 11 Floating body 12 Generator (power generation means)
13 Buoyancy adjustment chamber 14 Ballast (weight)
15 Protrusion 16 Middle partition plate 17 Opening 18 Air chamber (air chamber)
20 Vibrating water column 21 Fixed water column 25, 25A Air turbine (turbine for wave power generation, radiant flow type air turbine)
26 Turbine shaft 27 Rotor blade (rotary blade, radial flow impeller)
30 Link member (mooring cable, wire)
31 Tubular block 32 Support member 35 Turbine casing 36 Main body upper casing 37 Main body lower casing 38 Chamber 39 Air flow control mechanism 40 Middle partition assembly 41 Upper partition disk 41a Upper sleeve part 41b Tubular sleeve part 42 Lower partition disk 42a Lower sleeve Part 42b Tubular sleeve part 43 Nozzle ring assembly (static blade)
45, 46 Inlet 47 Shuttering plate (floating shutter)
48 Nozzle ring upper plate 49 Nozzle ring lower plate 50 Nozzle blade 51 Inflow chamber 53 Bearing 54 Outflow chamber 55, 56 Outflow port 57 Top outflow port 58 Bottom outflow port 59 Upper cover disk 60 Lower cover disk 61 Upper support disk 62 Lower Support disk 63 Rotary blade 64 Boss (rotor hub)
65 Top opening 66 Bottom opening 67 Tightening means 68 Impeller assembly 70 Rotor blade (radiant flow type impeller)
71 Boss (rotor hub)
72 Support disk 73 Rotary blade 75 Outflow chamber 76 Opening

Claims (9)

In the turbine for wave power generation that drives the generator of the wave power generator,
A turbine casing that is provided at the top of a cylindrical floating body, communicates an air chamber formed on a vibrating water column in the floating body and outside air, and is assembled in a separable manner;
A hollow disk-shaped partition assembly that can be divided into upper and lower parts and is assembled and fixed in the turbine casing;
A nozzle ring assembly as a stationary blade installed on the outer peripheral side of the partition assembly, and
An impeller as a moving blade integrally rotating with a turbine shaft that is installed facing the inner peripheral side of the nozzle ring assembly and is rotationally driven by the blown air flow;
A floating shutter that can be moved up and down is installed on the outer peripheral side of the nozzle ring assembly, and includes an air flow control mechanism that selectively switches between an air flow from outside air and an air flow from the air chamber,
The wave power generation turbine according to claim 1, wherein an air flow flowing into an outer peripheral portion of the partition assembly is guided as an inward flow in one direction through the nozzle ring assembly and the impeller. The middle partition assembly is provided with an upper partition disk and a lower partition disk at an interval on the inner peripheral wall of the turbine casing.
Between the upper partition disk and the lower partition disk , the torus-shaped nozzle ring assembly as a stationary blade is disposed on the outer peripheral side , and the impeller as a moving blade is disposed on the inner peripheral side , respectively.
The nozzle ring assembly is housed and fixed in opposed ring-shaped housing recesses inside the partition assembly, while the impeller is rotatably supported and housed on the turbine shaft,
2. The partition assembly according to claim 1, wherein a torus-like inflow chamber is formed on an outer peripheral side of the nozzle ring assembly, and a torus-like outflow chamber is formed on an inner peripheral side of a rotary blade of the impeller. Turbine for wave power generation. The impeller includes a boss portion as a turbine hub that inserts and supports the turbine shaft,
One or a plurality of upper and lower support disks integrally provided in the boss portion;
The wave power generation turbine according to claim 1 or 2, comprising a rotary blade row arranged in a circumferential direction on an outer peripheral side of the support disk. The inner partition assembly is connected to the air chamber through the inlet of the lower partition disk, while the inflow chamber is communicated to the atmosphere through the inlet of the upper partition disk,
The air flow control mechanism between the upper partition disk inlet and the inlet of the lower partition disk, comprises a ring-shaped floating shutter for floating vertically movably said inlet chamber,
The air flow control mechanism is configured such that the inlet of the upper partition disk and the inlet of the lower partition disk and the floating shutter cooperate with each other, and the inlet of the upper partition disk and the The turbine for wave power generation according to claim 2, wherein the inlet of the lower partition disk is selectively covered . In the middle partition assembly, the outflow chamber communicates with the atmosphere through the outlet of the upper partition disk, and communicates with the air chamber through the outlet of the lower partition disk,
The wave according to claim 2, wherein an upper cover disk that covers the outlet of the upper partition disk from above is provided so as to be movable up and down, and a lower cover disk that covers the outlet of the lower partition disk is provided so as to be movable up and down. Turbine for power generation. A lower cover disk is accommodated in the lower casing of the main body, and the lower partition disk is fitted to the inner peripheral wall of the lower casing of the main body .
A torus-shaped nozzle ring assembly is provided on the fitted lower partition disk, and an impeller assembly and a floating shutter are installed on the inner peripheral side and the outer peripheral side of the nozzle ring assembly, respectively.
Cover the floating shutter, the nozzle ring assembly and the impeller assembly from above with an upper partition disk,
An upper cover disk is placed on the upper partition disk, and the upper partition disk is fitted to the inner peripheral wall of the main body upper casing,
A method of assembling a turbine for wave power generation, comprising assembling a turbine casing by combining both flange portions of the main body lower casing and the main body upper casing together. The impeller assembly includes bearings on both sides of a boss portion as a rotor hub of the impeller,
The wave power generator according to claim 6, wherein the impeller and the turbine shaft are integrally assembled by inserting a turbine shaft into a boss hole of the boss portion including the bearing and fastening the turbine shaft with fastening means. Turbine assembly method. The turbine for wave power generation assembled on the ground by the method for assembling the turbine for wave power generation according to claim 6 is transported by ship to a floating body installation place on the sea,
The wave power turbine is detachably installed on the top of a floating body installed at sea,
A method for assembling a wave power generation turbine, comprising: installing a generator on the wave power generation turbine. Install a wave power turbine at the top of the floating body at sea,
In the operation method of the turbine for wave power generation in which the sea surface is moved up and down by seawater flowing into and out of the air chamber in the floating body, and the vibrating water column moves up and down,
As the oscillating water column rises as the sea level rises, the air flow in the air chamber pushes up the lower cover disk and the upper cover disk, and opens the bottom outlet of the partition assembly assembled and fixed in the turbine casing. Closing and opening the top outlet, while pushing up the floating shutter of the air flow control mechanism to open the lower inlet of the partition assembly and close the upper inlet;
Due to the descending of the oscillating water column accompanying the sea level descent, the air flow in the atmosphere lowers the floating shutter of the air flow control mechanism to open the upper inlet of the partition assembly and the lower inlet While closing, the upper cover disk and lower cover disk are lowered to close the top outlet of the partition assembly and open its bottom outlet,
An air flow that flows into the inflow chamber from the lower inlet when the sea level rises, and an air flow that flows into the inflow chamber from the upper inlet when the sea level descends from the nozzle ring assembly as a stationary blade to the moving blade. A wave power generation turbine operating method, characterized in that the turbine shaft is rotated by being guided as an inward flow in one direction to an outflow chamber via an impeller as described above.

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