CN86104768A - ocean wave energy receiver - Google Patents

Abstract

The ocean wave energy receiver is characterized by arc-shaped blades receiving power, so that the arc-shaped blades of 120°-180° are installed on a vertical shaft to form a vertical turbine arranged longitudinally. This machine can receive power from any direction in the ocean. The impact force of the wave kinetic energy, in the large flow of rivers, the machine can receive the kinetic energy of the flow simply by using this machine, so that the machine can drive the generator to convert the kinetic energy into electrical energy.

Description

Ocean wave energy receiver

The liberation of energy represents a liberation of productivity. The research on the development and utilization of new energy is a powerful lever for promoting the development of social productivity.

The ocean contains infinite energy, and only one energy source of wave energy can be used by human beings inexhaustibly.

The formation of sea waves is a seawater disturbance phenomenon caused by the gravity of earth rotation and the influence of natural wind power of atmospheric physical change above the ocean.

The motion law of sea waves is the superposition and synthesis of the periodic thrust of sine waves and the motion force of particle free-fall bodies, wherein the thrust moves forwards transversely on the longitudinal plane of sea water, and the motion force of the particle free-fall bodies is performed on the sine cycle of the waves. The motion force of sea waves is not expressed in the aspect of the sine waves of the sea level independently, and the transverse propelling force is carried out along with the sine waves on the longitudinal surface of the sea water, and the amplitude of the sine waves is reduced along with the depth of the sea water.

The size of sea wave has a certain relation with the depth of sea water, and has a direct relation with the size of natural wind power over the sea, the disturbance of the earth gravity to the sea water is a constant, and the change of the depth of the sea water and the natural wind power is two variables of the size of the formed sea wave.

When the depth of the sea water is fixed, the size of the sea wave is determined by the size of the wind power, and when the size of the wind power is fixed, the size of the sea wave is determined by the depth of the sea water. Because the amplitude of the sine wave is increased or decreased along with the depth of the sea water in the longitudinal direction, the amplitude disappears when the depth of the sea water is fixed, and the influence of the sea water depth on the wind power is directly related to the small wave of the shallow sea and the large wave of the deep sea.

The wave motion is not a flow, it also has a return force, which is seen on the coast-wave and subsequent dampening. The wave motion is a combination of impact force and restoring force under certain conditions, and the phenomenon cannot be seen in the deep ocean, and only continuous surge of one wave after another is seen.

The direction of motion of sea waves is sometimes also irregular, which is caused by the influence of the direction of the wind.

For physical characteristics of sea waves, it is a brief mention that how to recognize the kinetic energy of sea waves and take corresponding measures to receive the kinetic energy for utilization is the key.

The energy is the conversion situation of the energy, and the energy exists in the motion, which is the basic rule of natural motion, the amount of the kinetic energy in the ocean is almost the same, which cannot be estimated in fact, the power of the megawave tautahea and the tsunami in the ocean is the embodiment of the kinetic energy acting force of the ocean waves, and the large amount of the kinetic energy is infinite.

The structural principle of the wave energy receiver is designed according to the motion characteristics of sea waves as follows:

wave motion is a fluid motion which has a direction, but is not always regular, and not only needs to move the fluid, but also needs to receive the motion force with irregular direction, which is the main characteristic of designing a wave receiver, and the rotation principle of the arc blade type impeller is just suitable for the characteristic:

the arc blade is characterized in that: the blades are in a semi-circular arc shape, from the mechanical point of view, the arc-shaped blades are rotated, the resistance of the back arc is received by taking the resistance of a streamline friction front arc as an area, so that the difference between the front arc and the back arc is greatly formed. The arc-blade water turbine is suitable for the flow of fluid and the direction irregular motion of the fluid under different conditions, rotates under the action of impact force, and converts wave impact kinetic energy into mechanical kinetic energy, so that the first step process is completed, and the rotating water turbine drives a generator to generate electricity, so that the conversion process of the second step of wave energy is completed, which is the basic principle of wave kinetic energy receiving and converting.

Starting from the general theoretical concept, an example is provided to look at the magnitude of the fluctuating energy receiver power to show the benefit concept thereof.

Example (c): if the height of ocean wave is 3 m, the receiving surface of the arc-shaped wave kinetic energy receiver is 1 m wide and 10 m high, and the mass of seawater is 1000m³Kilogram, impact velocity according to wave velocity equation: c = $\sqrt{\mathrm{gh}}$ Meter, second, power W: the power equation: w = MA

: g is the acceleration of the free falling body, h is the wave height, M is the mass of the water, A is the receiving area;

substituting the equation for the wave velocity.

1000 kg x 1 m x 10 m in book $\sqrt{\mathrm{9\; ·8\; \times \; 3}}$ 55.000 kg/m/s and 102 kg/m/s for 1 kw

Reduced power: 55, 000 kg/m/s/102 kg/m/s 538 kw. In this way, a small wave energy receiver, in the case of a normal wave, has considerable receiving power: the wave energy receiver can give full play to the due benefits of the wave energy receiver when the wave height reaches 7-9 meters and the wave speed reaches 8-10 meters in the deep sea area of the ocean.

[ Structure and mounting of arc-vane type wave energy receiver ]

The mechanical design structure of the arc blade type wave energy receiver is not complex, the main structure is formed by longitudinally arranging a steel shaft and arc blades with the radian of 120-180 degrees and assembling the arc blades into a water turbine, the arc blades are made of steel plates with certain strength, and the arc blades of the water turbine can be assembled into 4 longitudinal rows, 6 longitudinal rows or more.

A base frame:

the base frame is a positioning facility for installing the water turbine, 4 fixed upright posts extending to the seabed are used, a steel cross is used for fixing the bottoms of the 4 upright posts, a bearing is installed at the center of the cross to position the bottom end of a rotating shaft of the water turbine, the top end of the base frame is fixedly connected with the 4 upright posts by the steel cross, a positioning bearing of the rotating shaft of the water turbine is installed at the center of the cross, the water turbine is installed at the middle position, and a platform is paved on the cross at the top by a steel plate.

A generator:

the generator is mounted at the top end of the rotating shaft of the platform water turbine higher than the water surface, the power of the generator is selected to be equal to that of the water turbine, the design of the generator is not needed to be repeated, and the existing water turbine generator is various and can be selected at will.

Mathematical formula for designing wave energy receiver

The formula I is as follows: wave velocity equation c =

. Referring to university physics water waves: in the formula

C-wave velocity meter/second

g-acceleration of free fall of 9.8 m/s²

height of h-wave

According to the equation, the wave height is known, and the wave velocity can be obtained

The formula II is as follows: power equation W = MA

In the formula

W-power, kilowatt or horsepower

M-mass of sea water or water, kg/cubic meter

Wave speed meter/second

1 kilowatt is 102 kilograms/meter/second and 1.36 horsepower,

1 horsepower 75 kg/m/s 0.736 kw.

Calculating the value according to the formula as a theoretical power value, wherein the efficiency of the water turbine is about 0.70-0.85, and the efficiency of the generator is about 0.88-0.90:

the formula III is as follows: formula of rotation speed: h ═ C)/(2 pi R) · t where:

n-rpm

c-wave velocity m/s

2 pi R-circumference equation, circumference of water turbine

t-time 60 sec/min

The value calculated by this formula is the theoretical value, and the obtained value is rpm.

Formula four, arc length formula: l ═ (n pi R)/180 formula:

length of L-arc length

Degree of n-arc

Radius of R-arc with reference to plane geometry

Knowing the radius and radian of the arc, the arc length can be found, and this formula is used to find the arc length of a cambered vane type blade.

Formula five, torque formula: md ═ (71620N)/(N) cm kg, where:

Md-Torque, cm kilogram

71620-factor

N-horsepower

n-revolutions per minute

Equation six, the shaft that is subject to bending and torsional loads, the necessary diameter equation:

< math > < mi d =3</mi > < msqrt > < mfrac > < mrow > < mi Md > < mi >0.2L permit </mi > </mrow > </mfrac > </mrrt > </math >

Refer to the book "Gear carrying Capacity". 24 West German AK Tomasis. In the formula:

d-diameter of load shaft

Md-Torque, cm kilogram

L-maximum allowable torsional stress kg/cm²The material of the shaft is selected.

The diameter of the shaft can also be expressed by < math > < mi d = A3 </mi > < msqrt > < mfrac > < mrow > < mi N </mi > </mrow > < mi N </mi > </mrow > </mfrac > </msqrt > < mi (millimeter) </mi > </math >

d-axis diameter A-axis material and allowable stress relation value

N-power, kilowatt

n-speed/min

See 448 pages in Yi Shu of rural Small hydropower stations, Zhejiang people publishing houses.

And the sixth formula is a diameter formula of the load output power shaft, and the formula is used for calculating the diameter calculation of the output power shaft of the wave energy receiver.

Formula seven, volume calculation formula of round platform cylinder:

V＝ (πh)/3 （r²+r² ₁+rr₁) In the formula:

v-volume r₁Upper head radius of circular table column

Pi-circumference ratio r-lower radius of circular column

h-height of truncated cone

The formula calculates the volume of the rotating shaft of the wave energy machine according to the arc blade profile: the received power of the water turbine is the composition of the area integral from the bottom blade to the top blade, and the torsional stress represented on the length section of the rotating shaft is different. Specifically, the lower force is small, the upper torsion force is large, and the total power is integrated on the section of the output shaft, so that the rotating shaft is designed to be a circular truncated cone cylinder instead of a cylinder, and the volume weight of the rotating shaft can be reduced.

Use of wave energy receivers:

the invention is mainly used for receiving ocean wave energy, and can receive the flow kinetic energy of large-flow rivers, such as Yangtze river, yellow river, Jinsha river, Dazhuan river, Yalu Tibet river and other sections with large flow velocity.

The river flow of China is particularly large, the investment is high when large hydropower stations are built, the construction is also limited by conditions such as terrain, manpower, material resources and the like, the investment is low by using the machine, the flow receiving function along the river is dispersed and independent, and the satisfactory effect can be achieved.

The invention belongs to the technical field of new energy technology development.

Incidentally, the construction of the ocean wave energy power station should be used together with the arc blade type vertical wind energy receiver which is the same principle of the invention applied by the inventor, so that the base frame of the same facility is provided with the wave energy receiver at the bottom to receive wave energy and the wind energy receiver at the top to receive wind energy over the ocean, and the number of the waves and ocean wind on the ocean can be two, and the low-cost ocean wind energy is lower. As well as its value of acceptance. The value of the wind power generation system is determined by simply calculating, 6-grade wind is normal ocean wind almost all day long, the average wind speed is 12.3 m/s, the wind power generation system with the height of 50 m and the diameter of 2 m is set to receive power, and the wind mass is 1.29 kg/m³。

Substituting the power equation: w ═ MAC

1.29 kg × 50 × 2 × 12.3 m/s 1586 kg/m/s

1586 kg/m/s/102 kg/m/s 15 kw

The patent office of the detailed description of the arc blade type vertical wind-driven functional receiver has the materials applied for, and the application numbers are as follows: 86103378, the machine is designed for receiving ocean wind and desert wasteland wind.

Claims (3)

1. The continuous operation main body mechanism is a water turbine which takes arc blades as main characteristics, a plurality of longitudinally arranged semi-arc blades are arranged on a vertical shaft of a steel cylinder to form a vertical turbine, and the continuous operation main body mechanism is characterized in that:

A. the radian of the blade is in a semi-arc shape between 120 degrees and 180 degrees.

B. The semi-arc blades and the vertical shaft are longitudinally arranged and fixedly connected to form an arc impeller.

C. The two ends of the vertical shaft of the cylinder are positioned and supported by bearings and are rotating shafts.

D. According to the requirement of C, the positioning support bearings are arranged on the positioning supports at the top and bottom ends of the vertical shaft of the impeller, and the water turbine is arranged between the two supports.

E. The top and bottom ends of the rotary turbine are provided with positioning brackets, and when a steel part cross-shaped frame positioning method is adopted, a rotary vertical shaft bearing is arranged at the central position of the cross-shaped frame.

F. According to the requirement of E, four ends of the cross are positioned and fixedly connected with a vertical column which extends to the seabed and is fixed, and the vertical column is supported in a suspending way.

2. According to the design device of claim 1, the impact force of the wave kinetic energy impacts on the semi-arc blades, and the impeller rotates directionally.

3. According to the claims 1 and 2, the generator is fixedly connected with the vertical shaft of the rotary turbine on the top cross-shaped positioning frame, so that the electricity can be generated, and the whole wave energy receiving process is completed.

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