CN210531047U - Oscillating floater wave energy power generation facility with biasing inertia body - Google Patents

Abstract

An oscillating floater wave energy power generation device with a bias inertia body belongs to the field of clean new energy. The power generation device comprises an inertia mechanism and an oscillating floater mechanism, wherein the oscillating floater mechanism comprises a floater and a submerged body, and a double-acting hydraulic cylinder, a hydraulic pipe system and a hydraulic motor generator set are arranged in the submerged body. The inertial mechanism is arranged in the floater, the rotor of the generator is coaxially connected with one shaft of the universal joint through the speed changer and the rotating shaft, and the rotating shaft provided with the offset inertial body is connected with the other shaft of the universal joint. When the floater oscillates in waves, the double-acting hydraulic cylinder supplies hydraulic oil; meanwhile, the inertial mechanism in the floater acts, and the bias inertial body drives the rotating shaft to rotate in a single direction. The power generation device can move in the directions of three degrees of freedom, namely heave, roll and pitch, and can obtain energy, so that the energy conversion efficiency is improved. Meanwhile, due to the fact that the natural oscillation frequency of the heaving and shaking devices is different, the effective frequency spectrum width of the energy conversion of the device can be effectively expanded, and the effective energy obtaining frequency range of the wave energy conversion device is increased.

Description

An oscillating float wave energy power generation device with a biased inertial body

technical field

The utility model relates to an oscillating float wave energy generating device with an offset inertial body, which belongs to the technical field of clean new energy.

Background technique

With the development of my country's economy, the supply of power resources has gradually become the main factor restricting my country's economic development. The traditional thermal power generation technology that uses fossil fuels such as coal and petroleum as the main source of electricity will cause serious environmental pollution and cannot meet the economic and environmental requirements. sustainable development strategy. With the advancement of science and technology, new energy technology has made great progress, and has gradually formed industrialized development, which has become a new way to solve the problem of my country's power resources.

my country's economic center of gravity is mainly concentrated in the eastern coastal areas, and my country has a coastline of more than 18,000 kilometers. Therefore, marine energy resources have received more and more extensive attention. Among them, wave energy has become the most promising direction in many marine energy resources due to its advantages of large resource storage, good stability, and low construction cost, and has received more and more extensive attention.

However, due to the low density of wave energy in my country, the energy conversion efficiency of ocean energy devices is low, which limits its large-scale development and use. Therefore, how to improve the energy conversion efficiency of ocean energy devices under the condition of low wave energy density has become a bottleneck problem in my country's ocean energy research. Traditional ocean energy devices mostly use a single-degree-of-freedom energy acquisition method, that is, wave ocean energy devices only move in a single-degree-of-freedom direction to obtain energy, resulting in a low energy conversion rate.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the prior art, the present utility model proposes an oscillating float wave energy power generation device with a biased inertial body. The three-degree-of-freedom direction of the pitch and pan moves and obtains energy, thereby improving the energy conversion efficiency. At the same time, due to the different natural vibration frequencies of heave and shaking, the effective frequency spectrum width of the device energy conversion can be effectively expanded, and the effective energy acquisition frequency range of the wave energy conversion device can be increased.

The technical scheme adopted by the utility model is: an oscillating float wave energy power generation device with an offset inertial body, the power generating device includes an inertial mechanism and an oscillating float mechanism, and the oscillating float mechanism includes a hemispherical hollow float and a hollow The submersible body is provided with a double-acting hydraulic cylinder, a hydraulic piping system including a pressure accumulator and a circulating oil tank, and a hydraulic motor generator set. The piston rod passes through the guide sleeve fixed on the submersible body; the inertial mechanism is set in the float, the stator of the first generator is fixed on the inner side of the hemispherical plane part of the float wall, and one end of the universal joint is fixed on the hemispherical circle of the float wall On the arc wall, the rotor of the first generator is connected coaxially with a shaft of the universal joint through the rotating shaft, and an offset inertial body is arranged on the rotating shaft close to the universal joint; the end of the piston rod Connected with the other shaft of the universal joint, when the float oscillates in the waves, the piston rod drives the piston to move in the double-acting hydraulic cylinder, and supplies hydraulic oil to the accumulator tank, and the hydraulic oil enters the hydraulic motor to drive the second hydraulic cylinder. At the same time, the inertial mechanism in the float acts, and the biased inertial body drives the shaft to rotate in one direction, and drives the first generator.

The universal joint adopts a ball-joint type universal joint or a cross-shaft hinge type universal joint.

The rotating shaft is provided with a ratchet mechanism, a gear speed increaser and a flywheel speed changer.

The guiding idea of the above technical scheme is: during operation, after the wave acts on the oscillating float, the float moves with the wave heaving, driving the piston rod to move up and down, thereby pushing the double-acting hydraulic cylinder in the submersible body to generate high-pressure oil, and the double-acting hydraulic cylinder The two ends are connected to the hydraulic motor through the hydraulic pipe system to realize the power generation function of vertical movement. At the same time, since the bottom of the float is provided with a universal joint, the float rotates around the universal joint at an appropriate angle under the action of waves. When the float rotates, the bias inertial body in the float drives the rotating shaft to rotate under the action of inertial force, and the rotating shaft is affected by the ratchet mechanism. The one-way rotation is restricted and maintained, and then the generator is driven to rotate at a constant speed through the gear speed increase and flywheel steady speed to realize the power generation function of the float rotation.

The beneficial effects of the utility model are as follows: the oscillating float wave energy generating device with an offset inertial body includes an inertial mechanism and an oscillating float mechanism, and the oscillating float mechanism includes a hemispherical hollow float and a hollow submersible body, and the submersible body is provided with Double acting hydraulic cylinder, hydraulic piping and hydraulic motor generator set. The inertial mechanism is arranged in the float, the rotor of the first generator is coaxially connected with one shaft of the universal joint through the transmission and the rotating shaft, and the rotating shaft with the offset inertial body is connected with the other shaft of the universal joint. When the float oscillates in the waves, the double-acting hydraulic cylinder supplies hydraulic oil; at the same time, the inertial mechanism in the float acts to drive the shaft to rotate in one direction by the biased inertial body. The power generation device makes full use of the oscillating float and the biased inertial body to move in the three-degree-of-freedom directions of heave, roll and pitch and obtain energy, thereby improving the energy conversion efficiency. At the same time, due to the different natural vibration frequencies of heave and shaking, the effective frequency spectrum width of the device energy conversion can be effectively expanded, and the effective energy acquisition frequency range of the wave energy conversion device can be increased.

Description of drawings

FIG. 1 is a structural diagram of an oscillating float wave energy power generation device with a biased inertial body.

Figure 2 is a working state diagram of an oscillating float with a biased inertial body located in a wave valley.

Figure 3 is a working state diagram of an oscillating float with a biased inertial body located at the wave crest.

Figure 4 is a schematic diagram of the hydraulic piping system.

In the figure: 1, float, 1a, float wall, 2, first generator, 2a, shaft, 2b, offset inertial body, 2c, transmission, 3, universal joint, 4, guide sleeve, 5, submersible body, 5a, submerged body wall, 6, double-acting hydraulic cylinder, 6a, piston, 6b, piston rod, 7, first high pressure hose, 7a, second high pressure hose, 8, accumulator tank, 9, hydraulic motor, 10 , second generator, 11, circulating oil tank, 12, free water surface, V1, first oil supply check valve, V2, second oil supply check valve, V3, first oil return check valve, V4, No. Secondary oil return check valve.

Detailed ways

FIG. 1 shows a structural diagram of an oscillating float wave power generation device with a biased inertial body. In the figure, this oscillating float wave energy power generation device with an offset inertial body includes an inertial mechanism and an oscillating float mechanism. The oscillating float mechanism includes a hemispherical hollow float 1 and a hollow submersible body 5. Inside the submersible body 5, there are double The acting hydraulic cylinder 6, the hydraulic piping system including the pressure accumulator 8 and the circulating oil tank 11 and the hydraulic motor generator set, the double acting hydraulic cylinder 6 is fixed on the submerged body wall 5a, and is connected to the piston rod of the piston 6a in the double acting hydraulic cylinder 6 6b passes through the guide sleeve 4 fixed on the submerged body 5 . The inertial mechanism is arranged in the float 1, the stator of the first generator 2 is fixed on the inner side of the hemispherical plane part of the float wall 1a, one end of the universal joint 3 is fixed on the wall of the hemispherical arc part of the float wall 1a, the first generator 2 The rotor is connected coaxially with a shaft of the universal joint 3 through the transmission 2c, the rotating shaft 2a, and an offset inertial body 2b is arranged on the rotating shaft 2a close to the universal joint 3. The end of the piston rod 6b is connected with the other shaft of the universal joint 3. When the float 1 oscillates in the waves, the piston 6a is driven by the piston rod 6b to move in the double-acting hydraulic cylinder 6, to the pressure storage tank 8. Hydraulic oil is supplied, and the hydraulic oil enters the hydraulic motor 9 to drive the second generator 10 ; at the same time, the inertial mechanism in the float 1 acts to drive the shaft 2a to rotate in one direction by the biased inertial body 2b to drive the first generator 2 . Universal joint 3 adopts a ball joint or a cross joint. The rotating shaft 2a is provided with a ratchet mechanism, a transmission 2c with a gear increasing speed and a flywheel stabilizing speed.

Figure 4 shows a schematic diagram of the hydraulic piping system. The solid arrows in the figure represent oil supply, and the hollow arrows represent oil return. The hydraulic piping system includes an accumulator tank 8, a plurality of one-way valves and a circulating oil tank 11. The hydraulic motor generator set includes a hydraulic motor 9 and a second generator 10. The pressure accumulator tank 8 is provided with an oil pressure gauge and a safety valve. The circulating oil tank 11 is provided with a liquid level gauge and a fuel tank cover. The first high-pressure hose 7 is connected to the accumulator tank 8 through the first oil supply check valve V1, and is also connected to the circulating oil tank 11 through the first oil return check valve V3. The second high-pressure hose 7a is connected to the second oil supply check valve in one direction. The valve V2 is connected to the pressure accumulator tank 8, and is also connected to the circulating oil tank 11 through the second oil return check valve V4. The oil outlet pipe of the pressure accumulator tank 8 is connected to the oil inlet of the hydraulic motor 9 that drives the second generator 10 to rotate. The hydraulic motor The oil outlet pipe of 9 is connected to the circulating oil tank 11.

Figure 2 shows a working state diagram of an oscillating float with a biased inertial body located in a wave valley. When the float 1 is in the valley, the piston 6a moves to the bottom end of the double-acting hydraulic cylinder 6. During this movement, the lower chamber of the piston 6a presses oil into the accumulator tank 8, and the upper chamber of the piston 6a absorbs oil from the circulating oil tank 11.

FIG. 3 shows a working state diagram of an oscillating float with a biased inertial body located at a wave crest. When the float 1 is at the crest of the wave, the piston 6a moves to the top of the double-acting hydraulic cylinder 6. During this movement, the upper chamber of the piston 6a presses oil into the accumulator tank 8, and the lower chamber of the piston 6a absorbs oil from the circulating oil tank 11.

Using the above technical solution, it is suggested to improve the power generation efficiency by making the float heave frequency equal to the local wave frequency. The float heave frequency can be obtained by the following formula:

（1）

(1)

Among them, M is the mass of the float, a ₃₃ is the additional mass, ρ is the density of seawater, and A is the water surface area in the float.

The natural vibration frequency in the rotation direction of the float can also be designed to be equal to the wave frequency to improve the power generation efficiency. The natural vibration frequency in the rotation direction can be obtained by the following formula:

（2）

(2)

为浮子水平方向面积矩；

为浮子垂荡方向体积矩。Among them, M is the mass of the float, g is the acceleration of gravity, z _c is the center of rotation of the float (that is, the position of the universal joint), z ₀ is the center of mass of the float, a ₅₅ is the additional mass in the direction of rotation of the float, and I ₁₁ and I ₃₃ are the floats respectively Moments of inertia in the horizontal and heave directions;

is the area moment of the float in the horizontal direction;

is the volume moment in the heave direction of the float.

The parameters of the above formula (1) and formula (2) are actually related, and usually cannot meet the same requirements as the local wave frequency. When designing, it is recommended to first ensure that the heave natural frequency is the same as the local wave frequency, and then adjust the rotation direction natural frequency on this basis.

Compared with the prior art, the utility model can use waves to generate electricity, which breaks through the limitation of single-degree-of-freedom energy acquisition of traditional wave power generation devices in the past, and can acquire energy in three directions of heave, surge and sway, improving energy conversion. efficiency. The calculation method of the natural vibration period of the two is further given, and the natural vibration period can be designed according to the local wave frequency to obtain a better wave power generation effect. When the water depth is relatively shallow, the bottom submersible body of the wave energy device can be placed on the seabed; when the water depth is relatively deep, the bottom submersible body can be connected to mooring systems such as anchor chains to submerge in the sea. The device can be used alone or in an array to achieve better energy harvesting effect. Based on the above reasons, the utility model can be widely promoted in the fields of marine engineering, coastal engineering and clean energy technology.

Claims (3)

1. An oscillating float wave energy power generation device with a biased inertial body, the power generation device comprising an inertial mechanism and an oscillating float mechanism, characterized in that: the oscillating float mechanism comprises a hemispherical hollow float (1) and a hollow The submerged body (5) is provided with a double-acting hydraulic cylinder (6), a hydraulic piping system including a pressure accumulator (8) and a circulating oil tank (11), and a hydraulic motor generator set, and the double-acting hydraulic The cylinder (6) is fixed on the submerged body wall (5a), and the piston rod (6b) connecting the piston (6a) in the double-acting hydraulic cylinder (6) passes through the guide sleeve (4a) fixed on the submerged body (5); The inertial mechanism is arranged in the float (1), the stator of the first generator (2) is fixed on the inner side of the hemispherical plane portion of the float wall (1a), and one end of the universal joint (3) is fixed on the side of the float wall (1a). On the wall of the hemispherical arc part, the rotor of the first generator (2) is connected with the one-axis coaxial line of the universal joint (3) through the transmission (2c) and the rotating shaft (2a), and is close to the universal joint (3). ) is provided with an offset inertial body (2b) on the shaft (2a); The end of the piston rod (6b) is connected with the other shaft of the universal joint (3). When the float (1) oscillates in the waves, the piston rod (6b) drives the piston (6a) in the double direction. The action hydraulic cylinder (6) moves in, and supplies hydraulic oil to the pressure accumulator (8), and the hydraulic oil enters the hydraulic motor (9) to drive the second generator (10); at the same time, the inertial mechanism in the float (1) is actuated by The biased inertial body (2b) drives the shaft (2a) to rotate in one direction, and drives the first generator (2). 2 . The oscillating float wave energy power generation device with a biased inertial body according to claim 1 , wherein the universal joint ( 3 ) adopts a spherical hinge type universal joint or a cross-axis hinge type universal joint. 3 . Festival. 3. An oscillating float wave energy power generation device with a biased inertial body according to claim 1, characterized in that: the rotating shaft (2a) is provided with a ratchet mechanism, a gear speed increaser and a flywheel stable speed transmission ( 2c).

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