Multi-degree-of-freedom direct-drive wave energy power generation device

Abstract

The application discloses a kind of multi-degree-of-freedom direct-drive wave energy power generation device, comprising: at least one first motor secondary or second motor secondary loaded with permanent magnet, at least one first motor primary or second motor primary loaded with coil, motor primary and motor secondary are matched together by circular guide rail and slider, relative motion is carried out in vertical direction.The multi-degree-of-freedom direct-drive wave energy power generation device provided by the application has the advantages of simple structure, safety and reliability, environmental protection, high efficiency, flexible use, etc., can adapt to different wave shapes, realize the relative motion of various combinations of double floating bodies, especially the left and right floating bodies fixed together realize rotation, vertical degree of freedom, or two degrees of freedom motion simultaneously, drive motor to carry out energy collection, and further improve energy conversion efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field, and particularly relates to a multi-degree-of-freedom direct-drive wave energy power generation device BACKGROUND

[0002] Global economic development inevitably drives the increasing demand for energy, and most of the energy consumption comes from traditional fossil energy, and these energy is limited, non-renewable, environmental pollution, geological destruction, greenhouse effect and other problems. In order to realize low-carbon emission reduction and sustainable economic development, the development and utilization of renewable new energy is listed as an important position in scientific research in the world. These renewable clean energy mainly includes wind energy, solar energy and wave energy. As a form of ocean energy, wave energy has higher energy density (0.4-0.6 kW / m 2 ) compared with solar energy (0.1-0.2 kW / m 2 ) and wind energy (0.4-0.6 kW / m 2 ). China has long coastline, large ocean area, and abundant wave resources. The development and utilization of wave energy have good prospects and economic benefits.

[0003] Wave collection technology attracts more and more researchers. From wave energy conversion to electric energy, usually 3-stage conversion is needed: the first stage is a wave body that absorbs wave kinetic energy; the second stage is an intermediate conversion device that can convert the unstable energy collected by the first stage into stable energy such as hydraulic energy and water storage potential energy; the third stage is a traditional power generation device that converts the energy provided by the second stage into electric energy. In this multi-stage energy collection, the intermediate energy loss is large, the overall efficiency is low, and the more conversion stages, the more fault points, and the equipment maintenance cost is high.

[0004] In order to improve the efficiency and reduce the cost of such multi-stage power generation equipment, direct-drive power generation is welcomed, but it is still in the initial application stage, and many problems need to be solved urgently. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a multi-degree-of-freedom direct-drive wave energy power generation device, which moves the floating body through the action of wave energy, and drives the linear motor to generate electricity. It has the characteristics of simple structure, safety and reliability, high efficiency, etc., and especially can convert energy in multiple degrees of freedom, and has strong adaptability to different wave shapes.

[0006] In order to solve the above technical problems, the application provides a multi-degree-of-freedom direct-drive wave energy power generation device, which comprises: at least one first motor secondary 7 or second motor secondary 13 loaded with a permanent magnet, at least one first motor primary 6 or second motor primary 15 loaded with a coil, and the motor primary and the motor secondary are matched together through a circular guide rail and a sliding block, and the double floating bodies drive the motor to perform a variety of combined relative motions, wherein one of the floating bodies is a left floating body 5 and a right floating body 16 which are fixed together, and the other relative floating body is an intermediate floating body 9.

[0007] The first motor primary 6 and the second motor primary 15 have a protruding cylinder in the front-rear direction, the cylinder is matched with a groove of the first transverse plate 4 and the second transverse plate 14, the left floating body 5 and the right floating body 16 are fixed together through the first transverse plate 4 and the second transverse plate 14, and the left floating body 5 and the right floating body 16 are centered on the central shaft 11 and move with waves, so that the left floating body 5 and the right floating body 16 which are fixed together realize relative motion in the rotational degree-of-freedom direction under the action of waves, or realize relative motion in the vertical degree-of-freedom direction up and down with waves, or realize relative motion in the rotational and vertical degrees-of-freedom directions at the same time with waves.

[0008] The first motor secondary 7 or the second motor secondary 13 is fixed to the left and right sides of the intermediate floating body 9 respectively, the central groove 9-1 of the intermediate floating body is matched with the hole of the first transverse plate 4 and the second transverse plate 14 through the central shaft 11, the intermediate floating body 9 is connected with the cylindrical submerged floating body 2 through the shaft 3, the cylindrical submerged floating body 2 is fixed together with the underwater damping disc 1, the central groove 9-1 of the intermediate floating body 9 is provided with a central shaft stop end cover 10, the first motor primary 6 and the second motor primary 15 of the motor coil are provided with an electric energy processing and energy storage device, and the electric energy is transmitted to an external network through a cable.

[0009] The intermediate floating body 9 stands in water and has two motion forms of small amplitude motion and basic static state, and the left and right floating bodies 5 and 16 which are fixed together with the motor primary perform relative motion in the combined degree-of-freedom relative to the intermediate floating body 9.

[0010] Preferably, after the central shaft 11 is matched with the central groove 9-1 of the intermediate floating body 9, the central shaft 11 can generate motion in the rotational, vertical and rotational and vertical degrees-of-freedom directions, and after the central shaft 11 is matched with the hole of the first transverse plate 4 and the second transverse plate 14, the central shaft 11 can generate motion in the rotational degree-of-freedom.

[0011] Preferably, the intermediate floating body 9, the first motor secondary 7, the second motor secondary 13, the shaft 3, the cylindrical submerged floating body 2 and the damping disc 1 are fixed together and hardly move with waves and stand in water.

[0012] Preferably, the left floating body 5, the right floating body 16, the first transverse plate 4, the second transverse plate 14, the intermediate floating body 9, the cylindrical submerged floating body 2 and the damping disc 1 are provided with a lightening cavity.

[0013] Preferably, the first motor secondary 7 and the second motor secondary 13 adopt Halbach permanent magnet arrays.

[0014] Preferably, the total length of the left float 5, the right float 16, the first transverse plate 4 and the second transverse plate 14 is greater than 1 / 4 of the wavelength of the wave.

[0015] Preferably, the first motor primary 6 and the second motor primary 15, the first motor secondary 7 or the second motor secondary 13 are respectively matched with the double first slider guide rail 8 and the second slider guide rail 12 to realize the relative movement of the primary to the secondary in the vertical direction.

[0016] The multi-degree-of-freedom direct-drive wave energy power generation device has the advantages of simple structure, safety and reliability, environmental protection, high efficiency, flexible use, etc., can adapt to different wave shapes, realize various combined relative movements of the double floats, especially the left and right floats connected together realize rotation, vertical freedom degree, or two freedom degrees at the same time, drive the motor to collect energy, and further improve the energy conversion efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present application.

[0018] Figure 2 It is a structural schematic diagram of the transverse plate in the present application.

[0019] Figure 3 It is a structural schematic diagram of the intermediate float in the present application.

[0020] 1, damping disc; 2, cylindrical submerged float; 3, shaft; 4, first transverse plate; 5, left float; 6, first motor primary; 7, first motor secondary; 8, first slider guide rail; 9, intermediate float; 10, stop end cover; 11, center shaft; 12, second slider guide rail; 13, second motor secondary; 14, second transverse plate; 15, second motor primary; 16, right float; 4-1, mounting hole; 4-2, weight reduction cavity; 4-3, groove; 4-4, center hole; 9-1, center groove; 9-2, weight reduction cavity; 9-3, mounting hole. DETAILED DESCRIPTION

[0021] As shown in Figure 1 , Figure 2 and Figure 3 , a multi-degree-of-freedom direct-drive wave energy power generation device comprises at least one first motor secondary 7 or second motor secondary 13 loaded with permanent magnets, at least one first motor primary 6 or second motor primary 15 loaded with coils, the motor primary and the motor secondary are matched together through a circular guide rail and a slider, and the double floats drive the motor to perform various combined relative movements.

[0022] The left floating body 5, the right floating body 16, the first horizontal plate 4 and the second horizontal plate 14 are fixedly connected together, the first motor primary 6 and the second motor primary 15 are matched with the slots of the first horizontal plate 4 and the second horizontal plate 14 through the convex shafts arranged thereon and can slide in the slots, and the left and right floating bodies drive the first motor primary 6 and the second motor primary 15 to move relatively with the wave movement; the damping disc 1, the cylindrical submerged floating body 2, the intermediate floating body 9 and the first motor secondary 7 and the second motor secondary 13 fixedly connected together with the intermediate floating body 9 almost do not move with the wave movement; the slot 4-3 of the horizontal plate hole 4 of the wave movement part and the central slot 9-1 of the static part are matched through the central shaft 11, and the movement part can realize the relative movement in the vertical direction, the relative rotation or the relative movement with two degrees of freedom of vertical rotation simultaneously with respect to the static part.

[0023] The cylindrical submerged floating body 2 is in the shape of a long cylinder and vertically stands in the wave, and almost does not move in the vertical direction under the damping action of the damping disc 1; the lower part of the damping disc 1 can be arranged to be hingedly fixed to the seabed, and the top end of the intermediate floating body 9 has a stop end cover 10 to prevent the equipment from being damaged by the excessively large wave.

[0024] The intermediate floating body 9 is provided with a weight-reducing cavity 9-2, the first horizontal plate 4 is provided with a weight-reducing cavity 4-2, the second horizontal plate 14, the left floating body 5, the right floating body 16, the cylindrical submerged floating body 2 and the damping disc 1 are all provided with weight-reducing cavities, so as to ensure the structural strength and reliability and reduce the overall weight of the equipment and improve the buoyancy of the equipment in the wave; the first motor primary 6 and the second motor primary 15 are provided with cavities, the cavities are provided with electric energy processing and storage devices, and the electric energy can be transmitted to the external network through the cable; all the cavities are sealed by sealing glue and coated with sealing glue.

[0025] At least one side of the two sides of the intermediate floating body 9 is provided with a motor to participate in power generation, and it is better to adopt double-sided motors; the first motor primary 6 and the second motor primary 15 are matched with the first motor secondary 7 and the second motor secondary 13 through double sliding block guide rails, so as to realize the stable and equal air gap relative movement of the secondary with respect to the primary. The first motor primary 6 and the second motor primary 15 can also be arranged on the two sides of the intermediate floating body and adopt the form of the movement side adopting a permanent magnet array. The permanent magnet array of the first motor secondary 7 and the second motor secondary 13 adopts a Halbach permanent magnet array, so as to enhance the single-side magnetic field and improve the air gap magnetic flux.

[0026] The height of the central slot 9-1 of the intermediate floating body 9 is related to the wave height of the wave power generation equipment input site; the slot length of the slots 4-3 on both sides of the central hole of the first horizontal plate 4 is related to the angle of the relative rotation of the equipment during power generation, and the slots of the second horizontal plate 14 are the same; the slots of the first horizontal plate 4 and the second horizontal plate 14 can also adopt a through slot form. There are sealing rubber pads between the fixedly connected parts and the sealing glue is coated.

[0027] The detailed description of the present application is as follows:

[0028] During operation, the waves act on the left floating body 5 and the right floating body 16, drive the floating bodies to move, and the left and right floating bodies drive the first motor primary 6 and the second motor primary 15 to move relative to the motor secondaries 8 and 13 of the middle floating body 9 through the slots of the first transverse plate 4 and the second transverse plate 14, the magnetic flux of each coil 6 and 15 in the primary changes, an electromotive force is induced in the coil, and the electric energy processing and energy storage device is connected, and then transmitted to the power grid.

[0029] The relative motion during operation here is the combined relative motion of the double floating body, the left floating body 5 and the right floating body 16 fixed together have four forms, and the middle floating body 9 has two motion forms, and the two are combined to move relatively. The four forms of the left floating body 5 and the right floating body 16 fixed together are: the first is that the transverse plates 4 and 14 of the left floating body 5 and the right floating body 16 are perpendicular to the secondary planes of the motor permanent magnet arrays 8 and 13, and the vertical direction relative motion perpendicular to the plane formed by the two transverse plates 4 and 14 is performed; the second is that the transverse plates 4 and 14 of the left and right floating bodies have a fixed intersection angle with the first motor secondary 7 and the second motor secondary 13 plane, and the vertical direction relative motion is performed under the condition of the fixed intersection angle; the third is that the first transverse plate 4 and the second transverse plate 14 of the left and right floating bodies have an intersection angle with the secondary plane of the first motor secondary 7 and the second motor secondary 13, but the intersection angle changes with the motion, which belongs to pure rotation relative motion; the fourth is that the left and right floating bodies 5 and 16 have a rotating motion with an angle change while moving in the vertical direction. For the four forms of relative motion of the left floating body 5 and the right floating body 16 fixed together, the device of the present application can convert the wave mechanical energy into electric energy. Among them, the first and the second have a common point, so they are classified as one, that is, the relative motion of the left and right floating bodies in the vertical direction, which is one degree of freedom, and the others are one degree of freedom. The middle floating body 9 stands in the water and has two running forms, the first is small amplitude motion in the vertical direction, and the second is a basically static form. Under the drive of the waves, the double floating bodies move relatively to drive the motor to generate electricity.

Claims

1. A multi-degree-of-freedom direct-drive wave energy generation device, characterized in that, include: At least one first motor secondary (7) or second motor secondary (13) loaded with permanent magnets, at least one first motor primary (6) or second motor primary (15) loaded with coils, the motor primary and motor secondary are connected to the slider via a circular guide rail, the dual float drive motor performs various combinations of relative motion, one of the floats is a left float (5) and a right float (16) fixed together, and the other relative float is a middle float (9). The primary of the first motor (6) and the primary of the second motor (15) each have a protruding cylinder in the front and rear directions. The cylinders are fitted with the grooves of the first horizontal plate (4) and the second horizontal plate (14). The left float (5) and the right float (16) are fixed together through the first horizontal plate (4) and the second horizontal plate (14). With the central axis (11) as the center, they move with the waves. After the central axis (11) is fitted with the holes of the first horizontal plate (4) and the second horizontal plate (14), it can generate motion in the rotational degree of freedom. The fixed left float (5) and the right float (16) realize relative motion in the rotational degree of freedom direction with the action of the waves with the central axis (11) as the center, or realize relative motion in the vertical degree of freedom direction with the up and down movement of the waves, or realize relative motion in both the rotational and vertical degrees of freedom directions simultaneously with the waves. The first motor secondary (7) or the second motor secondary (13) is fixedly connected to the left and right sides of the intermediate float (9). The central groove (9-1) of the intermediate float is engaged with the holes of the first horizontal plate (4) and the second horizontal plate (14) through the central shaft (11). The intermediate float (9) is connected to the cylindrical submerged float (2) through the shaft (3). The cylindrical submerged float (2) is fixedly connected to the underwater damping disk (1). A central shaft stop end cap (10) is provided above the central groove (9-1) of the intermediate float (9). The first motor primary (6) and the second motor primary (15) of the electromechanical coil are equipped with power processing and energy storage devices, and power is transmitted to the external network through the cable. After the central shaft (11) is engaged with the central groove (9-1) of the intermediate float (9), it can generate motion in the degrees of freedom of rotation, vertical, and rotation in the vertical direction. The primary (6) of the first motor and the primary (15) of the second motor, the secondary (7) of the first motor or the secondary (13) of the second motor are respectively adapted by double first slider guide rail (8) and second slider guide rail (12), and the primary and the secondary move relative to each other with a stable gap in the vertical direction. The intermediate float (9) stands in the water and has two motion forms: small-amplitude motion or basically stationary motion. The left float (5) and right float (16), which are fixed together with the primary motor, have a relative motion form with combined degrees of freedom relative to the intermediate float (9).

2. The multi-degree-of-freedom direct-drive wave energy generation device as described in claim 1, characterized in that, The intermediate float (9), the first motor secondary (7), the second motor secondary (13), the shaft (3), the cylindrical submerged float (2) and the damping disc (1) are fixed together and stand in the water.

3. The multi-degree-of-freedom direct-drive wave energy generation device as described in claim 1, characterized in that, The left float (5), right float (16), first horizontal plate (4), second horizontal plate (14), middle float (9), cylindrical submerged float (2) and damping disc (1) are provided with weight reduction cavities.

4. The multi-degree-of-freedom direct-drive wave energy generation device as described in claim 1, characterized in that, The first motor secondary (7) and the second motor secondary (13) adopt Halbach permanent magnet array.

5. The multi-degree-of-freedom direct-drive wave energy generation device as described in claim 1, characterized in that, The total length of the left float (5), right float (16), first horizontal plate (4), and second horizontal plate (14) fixed together is set to be greater than 1 / 4 of the wave wavelength.

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