JPS5891304A - Reciprocating flow air turbine device - Google Patents

Abstract

PURPOSE:To efficiently obtain stable energy from an axial reciprocating flow by constituting a rotor blade so that its zero lifting surface is rotatable at a predetermined angle with respect to the rotary shaft. CONSTITUTION:A rotor blade 33 is disposed between the rotary shaft 31 and a ring-shaped member 32. The shaft portion of the rotor blade 33 is formed with a plurality of projections 42 at the peripheral edge portion of a columnar base shaft 41. The projections 42 are engaged with recessed parts 43 formed on the inner peripheral surface of a ring-shaped member 32. The base shaft 41 is rotatable at a predetermined angle within the recessed part 43, and a rubber material 44 is fitted in both sides of the projection 42. The shaft part 35 of the rotor blade 33 is pivotally connected to the rotary shaft 31. At a rear position in the rotating direction of the rotor blade 33, a stopper member 45 is provided on the inner peripheral surface of the ring-shaped member 32. By the above arrangement, the rotor blade 33 rotates at a predetermined angle with respect to the axial reciprocating flow.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention seeks to efficiently obtain power from the reciprocating energy of airflow, and particularly relates to an improvement in an air turbine device that extracts energy from the wave motion of seawater.

As is well known, waves generated on the sea surface are guided into an air chamber,
This change in wave motion within the air chamber generates a reciprocating airflow, which can drive an air turbine and extract energy.

The rotary transducer disclosed in Japanese Unexamined Patent Publication No. 53-92060, that is, the so-called Quells turbine, does not require a valve mechanism for air rectification and always rotates in a constant direction with respect to the reciprocating air flow. As a result, it is attracting a lot of attention.

Figures 1(a) and 1(b) show the Quells turbine.
11 is a rotating shaft, and 12 is an irregularly shaped rotor blade. This rotor blade 12 is installed so that its zero-lift surface is perpendicular to the rotational axis J1. 1 is always rotated in a fixed direction.

By the way, the above Kuels turbine has rotor blades 12
Since the rotating propulsive force of the fist is small, the starting force is particularly weak, and the torque during rotation is small.Also, as shown in Fig. 2, there are two regions of low speed rotation SL and high speed rotation SII for the same wind speed. The output torque is also unstable with respect to the rotational speed, as shown by A in FIG. Therefore, when this turbine is connected to, for example, a generator, it is difficult to obtain sufficiently stable power.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide large rotor blades so that their zero-lift surfaces can rotate at a predetermined angle with respect to the rotation axis, thereby increasing the starting torque and reducing the rotor's axis. It is an object of the present invention to provide a reciprocating air turbine device that can smoothly rotate in a fixed direction regardless of the direction of airflow and can efficiently obtain stable energy.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, 31 is a rotating shaft, and 32 is a ring-shaped member (hereinafter referred to as rotary rim) arranged concentrically with this rotating shaft JJ.
A plurality of rotor blades S3 are installed between the two with a predetermined distance between them.The rotor blades 33 are, for example, symmetrical and have a shaft provided inside the front rut in the 1L rotation direction (direction of arrow C in the figure). This shaft portion 34e8B is pivotally connected to the rotary shaft 3 and the rotary rim 32, respectively.
Since they have the same configuration, only the shaft portion S4 will be explained using FIG. 4. FIG. 4 shows the part marked with a circle in FIG. 3. In FIG. 4, the shaft portion S4 has a plurality of protrusions 4 spaced apart from each other by a predetermined distance on the periphery of the cylindrical base shaft 41.
2, and this shaft portion S4 is provided with a recess 4S provided on the inner peripheral surface of the rotor rim 32 and having a similar shape to the shaft portion 34.
is engaged with. The concave portion 43 has a protrusion 41e) which is widened around the base shaft 41, and the base shaft 41' can be rotated by a predetermined angle. In addition, an elastic member 4, for example, a cylindrical rubber member 4 is provided on both sides of each protrusion 42 within the accommodation portion of the protrusion 41.
4 are fitted respectively.

In this state, the rotor blade 5SFi poumum material 44 is moved so that its zero lift surface (indicated by a dotted line) is aligned with the rotation axis 3J.
is biased in a direction perpendicular to the axis of the Further, the rotor rim J2 located at the rear of the rotor blade 33 in the rotational direction
A strike member 45 is provided on the inner peripheral surface of the blade SSO at a predetermined distance from both sides of the blade SSO. l
When wind pressure is applied in the direction along the axis of the rotor blade IIIK rotating wheel a1, the rotor blade 3
3 is rotated in the direction of arrow E in the figure against the biasing force of the member 44. The stop angle member 45 regulates the rotational position of the rotor blade 33, and is designed to prevent the rotational angle of the rotor grade JJ from exceeding about 15° in each direction.

According to the above configuration, the following effects can be obtained. The turbine of the present invention is also rotated in the C direction as shown in FIG. 3 by the airflow in either direction in the axial direction of the rotary shaft 31 based on the same principle as the Wells turbine. However, with this configuration, the rotational propulsive force of the turbine can be increased compared to the conventional one. In other words, the fifth wJ (a) corresponds to the conventional Wells turbine, and the zero of the rotor blade 12 The arrows indicate the pressure distribution when air tltv is flowing in a direction perpendicular to the lift surface. Also, arrows in the same color indicate the pressure distribution when the air flow V is flowing through the rotor blade 33 of the present invention. As is clear from this figure, the zero lift surface of the rotor blade 33 tilts at a predetermined angle according to the air flow V as shown in (b), but it is always the same with respect to the air flow V as shown in (a). Depending on the angle, the forward rotational force F1 is larger than the backward rotational force F3. Therefore, since the rotational propulsive force F that drives the turbine is much larger in (b) than in (a), it is possible to drive the turbine efficiently for the same airflow.

In addition, since the rotor blade 3S has a large rotational propulsive force,
The starting torque is greater than that of conventional Wells turbines,
However, the output torque is shown in Figure 6 depending on the rotation speed.
As shown in B, it has the advantage that it does not change suddenly. In this configuration, the rotor, rim sa#'i port, and blade 33 are held, and during one normal rotation, the flywheel's 1IllI movement is maintained. It is also effective in obtaining a stable rotational speed.Furthermore, the turbine of this configuration converts wave energy into air energy, making it suitable for wave power generation devices that use this air energy to drive generators. If suitable, it is possible to convert wave energy into efficient towing power and electric power. Note that the present invention is not limited to the above embodiments. That is, although the cross-sectional shape of the rotor blade s3 is a symmetrical airfoil shape, the cross-sectional shape is not limited to this, and may be an asymmetric airfoil shape depending on conditions such as wind speed.

Further, in the above embodiment, if the four-taper blade 33 is a fixed rotor blade, it is possible to increase the connection strength between the rotating shaft 31 and the rotor rim 32.

In addition, although the rotor blade JJti blade is configured to be pivoted by the shaft portions 34 provided at both ends, the present invention is not limited to this.
For example, the rotor blade may be provided with a shaft whose both ends are fixed to the rotation shaft 31 and the rotor rim 12, respectively, and the rotor blade may be provided around the shaft so as to be rotatable by a predetermined angle. With such a configuration, the connection strength between the rotating shaft 3J and the rotary rim 32 can be increased as described above.

Furthermore, although the elastic member 44 is used as the elastic member in the above embodiment, the elastic member is not limited to this; However, for example, a sponge or the like may be disposed on the surface of the stopper member 45 facing the rotor blade, and the rotor blade may be directly urged by this sponge.

Further, although the stopper member 45 is disposed on the inner circumferential surface of the rotary rim 32, the stopper member 45 is not limited thereto, and may be disposed on the rotating shaft S1 or a partner of the rotating shaft 31 and the rotary rim 32.

Further, by providing guide vanes in front and behind the turbine of the present invention to exclusively direct the airflow to the rotor blades, it is possible to further increase the rotational efficiency of the turbine.

It goes without saying that other variations can be made without departing from the gist of the invention.

As described in detail above, according to the present invention, the starting torque is large, the rotor rotates smoothly in a fixed direction regardless of the direction of the air fiK in any direction, and stable energy can be obtained efficiently. A reciprocating air turbine device can be provided.

[Brief explanation of drawings]

Figure 1 shows a conventional Wells turbine.
) is a front view, FIG. 2 is a diagram shown to explain the characteristics of the Wells turbine, and FIG. 3 is a front view showing an embodiment of the reciprocating air turbine device according to the present invention. , FIG. 4 is a perspective view showing the main part of FIG. 3 as a turtle, and FIG. , No. 6511
is a diagram showing the relationship between the output torque and the rotational speed of the turbine of the present invention. 31.° Rotation shaft, 32. Rotor rim, 33. Rotor blade, J4. 35. Shaft part, 4J...base axis, 42...°
Protrusion, 43... recess, 44... 9 member, 45...
・Stopper part O Applicant's agent Patent attorney Takehiko Suzue 1! lI! (a) (b) Fig. 2 JL Itm/S - 1f! t, v

Claims (1)

[Claims] A rotating shaft, a ring-shaped member disposed concentrically with the rotating shaft, and a plurality of ring-shaped members disposed at predetermined intervals between the ring-shaped member and the rotating shaft, and the rotating shaft and the ring member are arranged on the front edge side in the rotational direction. The nine airfoil-shaped member is pivotally mounted and the zero lift surface is rotatable by a predetermined angle with respect to any air fiK in the direction of the rotation axis.
9. A reciprocating flow air turbine apparatus comprising: - a-ta blade; and an elastic member that always biases the zero-lift surface of the a-ta blade in a direction perpendicular to a rotating shaft.