JPS60190677A - Submersible dalius turbine generator - Google Patents

Abstract

PURPOSE:To enable large capacity generation by installing a turbine generator on the bottom of sea thereby avoiding influence of wave produced through the ebb and flow of the tide while causing no hindrance against sailing of small vessel. CONSTITUTION:A base 1 is secured horizontally through civil work onto the bottom of sea. Then three or four posts 2 are planted on said base 1. Said posts 2 will support a water-tight bearing 3. Said bearing 3 will support a rotary shaft 9. A Dalius turbine 20 is arranged at the upper section of said shaft 9. The lower section of said shaft 9 is coupled through a speed increasing gear 11 to a water-tight generator 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a submerged Grius type water turbine power generation device, and more specifically, a three-winged Grius type water turbine generator that is capable of self-starting a generator fixed to the bottom of a ditch (where there is a tidal current). This invention relates to a submerged Grius type water turbine power generation device that converts the kinetic energy of the tidal current into electrical energy by rotating the water wheel.

In tidal current power generation, which converts the kinetic energy of tidal currents into electrical energy, it is possible to respond to changes in the direction of tidal currents, which is a characteristic of tidal currents, and to effectively recover energy. It is preferable to use a Grius type water turbine which has a constant direction and is relatively efficient.

A tidal current power generation device using a Griuss-type turbine is equipped with a float frame above a float that floats on the water surface or is semi-submerged below the water surface, and a generator is installed on top of the float frame, which rotates the generator. A configuration in which a Grius type water turbine is attached to a rotating shaft that is connected to a shaft, extends below the frame, and is submerged in water is known. However, in the case of a float type like this, if it is installed in a place with a large tidal difference, the float will move up and down, making it easy for accidents to occur with anchors and other mooring devices. If it is close to , it is susceptible to the effects of waves and has disadvantages such as being unable to generate large amounts of power.

This invention is aimed at eliminating the above-mentioned drawbacks, and is characterized by being vertically supported by a watertight bearing supported and fixed on a base fixed to the seabed with a plurality of support members. One end of the rotating shaft is fixed to the base and the cross section is connected to the rotating shaft of the generator, and the cross section is formed between a pair of purchase frames installed horizontally with a fixed interval at the other end of the rotating shaft. The present invention provides a submerged Grius type water turbine power generation device characterized by having a plurality of arcuate blades having an n-shaped cross section oriented in the same direction and mounted vertically.

Hereinafter, this invention will be described in detail with reference to a practical example shown in the drawings.

Figure 1 shows the configuration of the submerged Grius type water turbine generator of the present invention, in which 1 is a base installed horizontally by civil engineering work on the seabed a, and on this base there are three or four A bearing 3 is attached with the support (-L material 2), and the double thrust bearing 4 of this bearing, the self-aligning roller bearing 5, the oil seal 6 attached to the bearing 3, and the shaft sealing member 8 attached to the upper part of the bearing 3. Oil seal 1 installed on
The lower end of the rotating shaft 9, which is vertically and watertightly supported by is connected to an intermediate shaft 14 via a shaft joint 13, and a pair of disc-shaped blade mounting frames 1 are attached to the upper and lower ends of this intermediate shaft.
5.16 is installed horizontally, and as shown in Fig. 2, three circular arcs P917 with a cross-sectional configuration to be described later are attached between the frames at the same radius ( γ) are mounted on the plane with the cross sections facing the same direction. In this way, by using three arcuate blades, fluctuations in rotational force are more stable than in the case of one or two blades.

Arc j! The frame 17 has a box-shaped cross section as shown in FIGS. 3(a) and 3(b), and has two support shafts 17A.
5.16, and the arcuate blade 17 is a metal plate 19 smoothly attached to the outside of the plurality of concave brackets 18 attached to the support shaft.

The Darrieus type water turbine section 20, which is composed of the intermediate shafts IA and H mounting frames 15 and 16 and the circular arc $917, is an important part that recovers the energy held by the fluid, and the conditions of the installation location such as flow m1 water depth etc. Therefore, the shape of the oka is the circular arc type mentioned above, which has a smaller output coefficient than the linear type.
/υHowever, υ: liquid flow velocity, γ: radius of the water wheel, ω: angular velocity of the water wheel) is 0.25-0.33 vn'/
It is efficient in the range of s.

The submerged Darius type water TF1 photoelectric device of the present invention is constructed as described above, and the water flow is indicated by the arrow B as shown in FIG.
At this time, the water wheel section 20 rotates in the direction of arrow C by self-starting according to a well-known theory.

Here, the wind turbine shaft output P of the Grius-type wind turbine in the air is expressed by the following relational expression: P = 1 y' 2ρAυSμ. In this previous equation, ρ: Air density △: Wind passage surface (4 υ 2 ffl Speed μ: Efficiency Q. Therefore, the output of Fugetsu ■ is proportional to the air density, passing area, and efficiency, and is the cube of the wind speed. It is clear that there is a proportionality, and in a type of Grius-type water turbine that is made to rotate underwater,
The density of water is about 1000 times that of air, so
According to the above equation, even if the passing area and efficiency are the same, in order to obtain the same output P, it is sufficient for the water speed to be about 1/10 of the wind speed. In addition, in this Grius-type wind turbine, the normal wind speed is 4~em,,'s, whereas the water speed of natural ocean currents and river currents is 0.6~LOm/s, so 1. To obtain the same output as a wind turbine, the area through which water passes should be approximately 1/3 to 1/4,
Compared to the case of a wind turbine, a smaller one is sufficient, and therefore the foundation work of the base 1 installed on the seabed or under water can be easily done.

In general, in Grius-type wind turbines, the number of rotations is high, so in order to reduce the centrifugal force, the wind turbine is shaped like a belt, and the radius of the blade attachment position is increased at the center of the rotation axis, and the radius is decreased at both ends of the rotation axis. However, when used as a water turbine, the rotation speed of the intermediate shaft 14 is small, so it is sufficient to attach the circular arc 1'l17 parallel to the intermediate shaft 14, and the circular arc blade 11 By increasing the area of , the area through which water passes can be increased.

Now, the efficiency of the troboskinin-type Grius type wind turbine is 35
．． 596, and if we apply that efficiency directly to the water turbine, the efficiency will be 41.4%, and the unit passage surface (
The water turbine output per unit i is 0,207k when the water speed is 1m/s.
w/vl. Therefore, if the installation radius of the arc blades 11 of the water turbine 20 from the intermediate shaft 14 is γ-5 m, and the height H of the arc blades 17 is 5 m, the rated water speed Ill/S is 1.
A water turbine output of 0kw can be obtained. When installing, fix the base 1 at an optimal position where the water speed changes depending on the water depth, and at a position where the depth from the water surface does not impede the navigation of the ship, and use a waterproof cable with high pressure resistance to output the output from the source Ir1t110. It is used by transmitting it to the ground via.

As mentioned above, is this invention based on a base fixed to the seabed? ! One end of the rotating shaft, which is vertically supported by a water-tight H1-shaped bearing supported and fixed with several struts, is connected to the rotating shaft of the generator fixed to the base, and the other end of the rotating shaft is connected to a certain Since multiple arcuate blades with airfoil-shaped cross sections facing the same direction were installed vertically between a pair of purchased frames that were installed horizontally with an interval between them, it was possible to create a float-type tidal current source. Compared to the li installation, the upper part of the water turbine is 4 to 40 m above sea level at high tide.
Maximum tidal difference is 31N by installing at a position 5m below.
Even if the system is installed on the seabed, it will not be exposed to the effects of waves, will not impede passage of small ships, and because it is installed on the seabed, it will be able to generate electricity while suspending people.

[Brief explanation of the drawing]

Each of the figures shows an embodiment of the present invention; Fig. 1 is a side view of a water turbine generator, Fig. 2 is a cross-sectional view of the water turbine taken along line A-A in Fig. 1, and Fig. 3 (field Top view of arc wing,
FIG. 3(b) is a side view showing the frame structure of the arcuate wing. 1... Base, 2... Support material, 3... Bearing, 9...
... Rotating shaft, 10... Starting/Normal machine, 11... Speed increaser, 1
4... Intermediate shaft, 15, 16... Seki mounting frame, 1
7... Arc blade, 20... Darius type water wheel section. Figure 2 Figure 3 (Ku) Figure 3 (-e)

Claims (1)

[Scope of Claims] ) Fixed to a square bottom, l [A rotating shaft with one end of a rotating shaft vertically supported by a watertight bearing supported and fixed on the base with a plurality of support members fixed to the base? l1l
A plurality of circular arches with airfoil-shaped cross sections oriented in the same direction are connected vertically between a pair of mounting frames connected to the rotation axis of fi, and installed horizontally at a fixed interval on the other end of the rotation axis. A submerged Grius type water turbine power generation device characterized by being installed in a.