JPS5857082A - Two-way pneumatic axial-flow turbine in wind tunnel - Google Patents

Abstract

PURPOSE:To obtain the rotational torque of a constant direction in either direction of air-flows by providing wing-shaped blades such as NACA or the like tangentially in the same rotational direction on circumferential orbits round a shaft. CONSTITUTION:A shaft 3 supported to be rotatable in a wind tunnel 3 is equipped with a plurality of radial arms 4, 4'... and 5, 5'... at equal angles round the said shaft 3, while a plurality of wing-shaped blades 6, 6'... such as NACA or the like are respectively provided on these arms tangentially in the same rotational direction on circumferential orbits round the shaft 3. In this construction, since blades 6, 6'... on both sides of the shaft 3 is directed symmetrically against the direction of the air-flow running in the wind tunnel 2, a turbine main body 1 can obtain the rotational torque of a constant direction in either direction of air-flows.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bidirectional aerodynamic axial turbine in a wind barrel, which converts bidirectional air flow passing through the wind barrel into unidirectional rotational force in a wave power generator or the like. Conventionally, the turbines used in wave power generators, etc. were multi-blade screw type with the rotating shaft parallel to the air flow, so the turbines used in wave power generators, etc. Only one direction of flow could be used for conversion into rotational force.

Figure tII11 shows a single-valve mechanism type wave power generator using the above-mentioned turbine.
A turbine connected to a generator (Q) is installed on top of a turbine (Q), and a valve (e) is installed in a wind barrel ('b) located in front of the turbine (d). When an upward air flow occurs due to the rise of (a), the valve (e) closes, and this air flow directly rotates the turbine (d) f.
On the other hand, when the air flow becomes downward as the sea level (a) falls, the valve (e) opens to introduce outside air into the wind barrel (b) to prevent the turbine (d) from reversing. Therefore, the above-mentioned wave power generator has the disadvantage that only the air flow when the sea level (a) rises can be converted into rotation of the turbine (d), and the conversion efficiency of wave energy is very poor.

Figure 2 shows a wave power generator with a four-valve mechanism that allows the turbine (d) to rotate even when the sea level is falling. It is divided into two flow paths by If a downward air flow occurs as the sea level (a) falls, the valve (g) (:1
) closes and valves (f) and (h) open 7f. In both cases, the air flows in the same direction to the turbine (d), requiring a complicated valve mechanism and the air flow path being bent, resulting in large resistance. It had the disadvantage of low efficiency.

In other words, the above-mentioned drawbacks of wave power generators are due to the fact that the turbine only rotates when air flows in one direction, so it is necessary to develop a turbine that can generate rotational force in the same direction even when air flows in both directions. It was wanted.

In view of these drawbacks, the present invention provides a nine-turbine turbine in which airfoil-shaped blades such as NACA are mounted tangentially and in the same direction with respect to the rotational direction on a circumferential orbit centered on the rotation axis. An embodiment of the present invention will be described below with reference to the drawings. (11 is a turbine main body, and a rotating shaft (3 ) is rotatably supported, and a plurality of arms (4) (4)'・fist・, (5)( 5)'... are installed respectively.

The cross-sectional shapes of the arms (4), (4)'..., (5), (5)', etc. are preferably rectangular hexagonal, inertia-circular, airfoil-shaped, etc., so that air resistance during rotation is small.

(6) (6)'... is formed into a streamlined cross-section with the tip thicker than the rear end.The upper and lower arms (4) are made of nine NAOA4 airfoil-shaped blades. '..., (5)(
5)'... The arms (4) are arranged tangentially on a circumferential orbit centered on the rotating shaft (3) and in the same direction with respect to the rotational direction, and the arms (4) (4)'...・,(5)
(5) Aggregate (7) fixed to the inner surface of '... (yY-
The vertical end portion is fitted and supported by the fist (8) (8)'. In addition, blade (6) (6)'...11
The length of the fourth string is set to be shorter as it is closer to the rotation axis (3) due to the aerodynamic characteristics during rotation.

Also, the arm (4) that supports the blade <6) (6)'...
The number of (4)'..., (5) (5)'... can be set arbitrarily according to the desired rotational torque, and the arrangement in the case of 2 to 6 pieces is shown in Figure 1I/IJ5 ( Figures 6 (a) to (h) are as shown in a) to (e).
2), in this case blade (6) (6
)'... are adjusted according to the inner surface shape of each wind cylinder (2).

Figure 7 shows the central part of the blade (6) (6)'... bent outward;
1), a centripetal force is applied to the rotation shaft (3), and the thrust load can be reduced.

Figure 8 also shows two turbine bodies (1) (
1)' are arranged in series to make effective use of aerodynamic force. (9) (9)'... are rectifying plates arranged parallel to the air flow between the turbine bodies (1) and (1)'.

In short, the present invention provides a rotating shaft (3) that is rotatably supported in a wind barrel (2), and a plurality of arms (4) (4)'... extending radially around the rotating shaft (3). , (5')
(5) Attach the arms (4) (4) at equal angles.
'..., (5) (5)'... rotation axis (3)
A plurality of airfoil-shaped blades (6) (6Y...) such as NACA were installed on a circumferential orbit centered on the wind body (2 ) The turbine body (1) has left and right grades (6) (6) centered around the rotation axis (3) in the direction of air flow inside the turbine body (1).
Since the directions of '... are symmetrical, there is a difference in resistance to the air flow, and this is the same condition for air flow in both directions, so the turbine body (1) Even with the flow, rotational torque can always be applied in the same direction. Therefore, if the in-wind barrel bidirectional aerodynamic axis turbine according to the present invention is used in a wave power generator that utilizes the air flow generated by the vertical movement of the sea surface, the air flow as shown in FIGS. When the sea level rises, there is no need for complicated valve mechanisms that increase resistance.
It is possible to convert the air flows in both directions that occur during descent into rotational force in the same direction, and it is possible to greatly improve the conversion efficiency. Its practical effects are enormous, as it can be used in a wide variety of minute meters as an attachment that converts flow into rotational force.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention.
Figure 3 is a cross-sectional view of a conventional wave power generator, Figure 3 is a perspective view of a bidirectional aerodynamic shaft turbine in a wind barrel according to the present invention, Figure 4 is a perspective view of the turbine body, and Figure 5 is a perspective view of the arm and other parts. FIG. 6 is a new view showing another embodiment of the wind body, FIG. 7 is a sectional view showing another embodiment of the blade, and FIG.
The figure is a plan view showing another embodiment in which two turbine bodies are provided. (1) Turbine body (2) Wind barrel (3) Rotating shaft (4)
(4)'...(5) (5)'...arm, (6)
(6)'...Grade or higher Applicant Mori Shige Bunkan l- / 2nd cause 2/ @4 Figure 4. Figure 5 (c) (d) (e) Figure 6

Claims (1)

[Claims] A plurality of arms extending radially around the rotation shaft are attached at equal angles to a rotation shaft rotatably supported in the wind barrel, and a plurality of arms are attached on a circumferential orbit around the rotation axis in the arms. A bidirectional aerodynamic shaft turbine in a wind barrel, characterized in that airfoil-shaped blades such as NACA are attached tangentially and facing in the same direction with respect to the rotational direction.