Power generation mechanism, wave generator and wave power generation system

Abstract

The present invention relates to the technical field of ocean energy power generation, and in particular to a power generation mechanism, a wave generator and a wave power generation system. The power generation mechanism includes: at least two power generation units arranged according to a preset arrangement rule, each power generation unit includes: a primary part, having a hollow groove; a secondary part, arranged in the hollow groove, and an air gap is formed between the secondary part and the primary part. The present invention arranges a plurality of power generation units in the power generation mechanism, and the structure of a single power generation unit is simpler and easier to maintain. Without changing the original capacity of the power generation mechanism, the capacity of a single power generation unit is greatly reduced. At the same time, the power generation units in the power generation mechanism can be arbitrarily increased or decreased according to the capacity requirements, and the arrangement form of the plurality of power generation units can also be flexibly changed according to the structural requirements of the power generation mechanism, so that the structure of the power generation mechanism can be more diversified, which effectively solves the problem of poor structural flexibility of the linear generator in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean energy power generation, and in particular to a power generation mechanism, a wave generator and a wave power generation system. Background Art

[0002] Wave energy power generation devices can be divided into non-direct drive and direct drive types. The non-direct drive type mainly utilizes the combination of hydraulic transmission and hydraulic motor, oscillating air chamber and steam turbine, etc. to first convert wave energy into mechanical energy or seawater potential energy, and then convert it into rotational kinetic energy to drive the rotating generator to generate electricity; the direct drive type uses a linear motor to directly drive the linear generator through wave energy to generate electricity. There is no intermediate energy conversion device or transmission device. It has the advantages of simple structure, small size, high energy conversion efficiency, and easy maintenance.

[0003] At present, the existing linear generators used for wave energy power generation are mainly cylindrical, and the waves drive the secondary to move relative to the primary to generate electricity. The linear generator with this structure has a high space utilization rate, but because the primary and secondary are both integral cylindrical structures, the structure is relatively fixed and the weight of a single machine is large, making it difficult to effectively cope with different scenarios. It is also difficult to maintain when an internal failure occurs. Therefore, the existing linear generators still have the problem of poor structural flexibility. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor structural flexibility of the linear generator in the prior art, thereby providing a power generation mechanism, a wave generator and a wave power generation system.

[0005] In order to solve the above problems, the present invention provides a power generation mechanism, which includes: at least two power generation units arranged according to a preset arrangement rule, each power generation unit includes: a primary part, having a hollow groove; a secondary part, arranged in the hollow groove, an air gap is formed between the secondary part and the primary part, and one of the primary part and the secondary part moves back and forth relative to the other to generate electricity.

[0006] Optionally, the primary part includes a plurality of primary modules, and the plurality of primary modules are arranged side by side and along a moving direction of the primary part or the secondary part.

[0007] Optionally, each primary module includes a primary core and a plurality of primary windings, the primary core is a C-shaped structure, the plurality of primary windings are wound around the primary core, and the secondary part is inserted into an opening of the primary core.

[0008] Optionally, there are two primary windings, which are respectively wound around the teeth of the primary core; or, there is one primary winding, which is wound around the yoke of the primary core.

[0009] Optionally, the power generation mechanism further includes a secondary support frame and a primary support frame, at least one secondary part is fixed on the secondary support frame, and at least one primary part is fixed on the primary support frame.

[0010] Optionally, at least two power generation units are arranged along a circumferential direction, or at least two power generation units are arranged along a direction perpendicular to the moving direction of the primary part or the secondary part.

[0011] Optionally, at least two power generation units are arranged along the moving direction of the primary part or the secondary part.

[0012] The present invention also provides a wave generator, comprising an oscillating float and a shell. The wave generator also comprises the above-mentioned power generation mechanism, and the power generation mechanism is arranged inside the shell.

[0013] Optionally, each power generation unit in the power generation mechanism is connected to the energy storage part through an inverter to form an energy storage circuit, and at least two power generation units and the energy storage part form at least two independent energy storage circuits.

[0014] The present invention also provides a wave power generation system, which comprises: the above-mentioned wave generator.

[0015] The present invention has the following advantages:

[0016] 1. Multiple power generation units are arranged in the power generation mechanism. Compared with the original integrated generator structure, the structure of a single power generation unit is simpler and easier to maintain. Without changing the original capacity of the power generation mechanism, the capacity of a single power generation unit is greatly reduced. At the same time, the power generation units in the power generation mechanism can be increased or decreased arbitrarily according to the capacity requirements, and the arrangement of multiple power generation units can also be flexibly changed according to the structural requirements of the power generation mechanism, so that the structure of the power generation mechanism can be more diversified, which effectively solves the problem of poor structural flexibility of the linear generator in the prior art.

[0017] 2. At least two power generation units are arranged in a circumferential direction, or at least two power generation units are arranged in a direction perpendicular to the moving direction of the primary part or the secondary part. The arrangement of the power generation units is flexible and can effectively meet the different structural requirements of the power generation mechanism.

[0018] 3. Each power generation unit is equipped with a current sensor and a voltage sensor, and a switch device. When a motor fails, the current sensor and voltage sensor detect a sudden change in the current or voltage of the motor, and the switch device is used to cut off the faulty power generation unit alone without affecting the overall operation of other power generation units and the wave generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a power generation unit of a power generation mechanism according to a first embodiment of the present invention is shown;

[0021] Figure 2 Shows Figure 1 A schematic diagram of a structure of a power generation unit of a power generation mechanism having two primary windings;

[0022] Figure 3 Shows Figure 1 A schematic diagram of the structure of a power generation unit of a power generation mechanism having a primary winding;

[0023] Figure 4 Shows Figure 1 A schematic diagram of the magnetic field line distribution of the power generation unit of the power generation mechanism;

[0024] Figure 5 Shows Figure 1 A schematic structural diagram of a primary core of a power generation unit of a power generation mechanism;

[0025] Figure 6 Shows Figure 1 A schematic diagram of a 60-degree phase separation structure of a power generation unit of a power generation mechanism;

[0026] Figure 7 Shows Figure 1 A schematic diagram of a 120-degree phase separation structure of a power generation unit of a power generation mechanism;

[0027] Figure 8 Shows Figure 1 A schematic diagram of a bilateral arrangement of power generation units of a power generation mechanism;

[0028] Fig. 9 Shows Figure 1 A schematic diagram of a first four-side arrangement of power generation units of a power generation mechanism;

[0029] Fig.10 Shows Figure 1 A schematic diagram of a second four-side arrangement of power generation units of a power generation mechanism;

[0030] Fig.11 Shows Figure 1 A schematic diagram of a hexagonal arrangement of power generation units of a power generation mechanism;

[0031] Fig.12 Shows Figure 1 A schematic diagram of an eight-sided arrangement of power generation units of a power generation mechanism;

[0032] Fig.13 Shows Figure 1 A schematic diagram of a parallel arrangement of power generation units of a power generation mechanism;

[0033] Fig.14 Shows Figure 1 A schematic diagram of an arrangement in which the secondary part of the power generation unit of the power generation mechanism is located on the outside;

[0034] Fig.15 A schematic structural diagram of a wave generator according to a first embodiment of the present invention is shown;

[0035] Fig.16 A schematic structural diagram of a wave generator according to a second embodiment of the present invention is shown.

[0036] Description of reference numerals:

[0037] 10. Oscillating float; 11. Rope; 20. Shell; 31. Secondary part; 32. Primary core; 33. Primary winding; 34. Magnetic lines; 41. Secondary support frame; 42. Primary support frame; 43. Linear guide rail; 44. Spring; 45. Limit block. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Embodiment 1

[0043] like Figures 1 to 14 As shown, the power generation mechanism of this embodiment includes: at least two power generation units arranged according to a preset arrangement rule, each power generation unit includes: a primary part and a secondary part 31, the primary part has a hollow groove; the secondary part 31 is arranged in the hollow groove, and an air gap is formed between the secondary part 31 and the primary part, and one of the primary part and the secondary part 31 moves back and forth relative to the other to generate electricity.

[0044] The power generation mechanism of this embodiment is applied, and multiple power generation units are arranged in the power generation mechanism. Compared with the original integrated generator structure, the structure of a single power generation unit is simpler and easier to maintain. Without changing the original capacity of the power generation mechanism, the capacity of a single power generation unit is greatly reduced. At the same time, the power generation units in the power generation mechanism can be increased or decreased arbitrarily according to capacity requirements, and the arrangement of multiple power generation units can also be flexibly changed according to the structural requirements of the power generation mechanism, so that the structure of the power generation mechanism can be more diversified, which effectively solves the problem of poor structural flexibility of linear generators in the prior art.

[0045] Specifically, this embodiment proposes a modular transverse flux linear power generation mechanism. The air gap formed between the secondary part 31 and the primary part is completed when the secondary part 31 and the primary part are installed. Therefore, in order to ensure the quality and reliability of the air gap, it is necessary to ensure that the secondary part 31 and the primary part have sufficient installation accuracy during installation.

[0046] In this embodiment, the primary part includes a plurality of primary modules, and the plurality of primary modules are arranged side by side and along the moving direction of the primary part or the secondary part 31. The plurality of primary modules and the secondary part 31 together form a topological structure of a generator, which has a simple and reliable structure and is easy to process and manufacture.

[0047] Specifically, there is no limitation on the number of primary modules and secondary parts 31 in a single primary part. One primary module may correspond to one secondary part 31, or multiple primary modules may correspond to multiple secondary parts 31. The specific correspondence method can be selected according to the primary and secondary correspondence method in the existing linear motor.

[0048] Preferably, the secondary part 31 is a permanent magnet. The secondary part 31 may be a single permanent magnet or may be composed of a plurality of permanent magnets arranged in an array.

[0049] In this embodiment, each primary module includes a primary core 32 and a plurality of primary windings 33. The primary core 32 is a C-shaped structure. The plurality of primary windings 33 are wound around the primary core 32. The secondary part 31 is inserted into the opening of the primary core 32. The magnetization direction of the secondary part 31 is perpendicular to the inner surface of the C-shaped primary core 32 and is arranged in an NS manner. When the secondary part 31 and the primary core 32 move relative to each other, an induced potential is generated in the primary winding 33 to realize the power generation function. The overall structure of the power generation unit is simple and easy to manufacture and process.

[0050] Specifically, Figure 4 The schematic diagram of the distribution of magnetic lines of force 34 of the primary module shown in the figure shows that the magnetic flux path in the C-shaped primary core 32 is secondary part 31-air gap-primary core 32-air gap-secondary part 31. The magnetic leakage in the whole path is small, so the secondary part 31 does not need to be provided with a back iron structure, thereby reducing the complexity of the overall structure of the power generation unit, and at the same time, it can also effectively reduce the weight of the power generation mechanism, so that the power generation mechanism has the advantages of light weight and magnetic concentration; the primary core 32 is preferably made of laminated silicon steel sheets, which can effectively reduce the eddy current loss of the primary core 32; the specific material of the primary winding 33 can be made of copper winding, aluminum winding and other materials. It can be understood that as an alternative embodiment, the primary core 32 can also be made of other conventional core manufacturing materials.

[0051] Furthermore, when the power generation unit adopts a three-phase winding, the phase can be divided according to the 60-degree phase band of AZBXCY, and the six primary modules correspond to the two secondary parts 31. The specific setting method is as follows: Figure 6 As shown; according to the 120-degree phase of ABC, 6 primary modules correspond to 4 permanent magnets. The specific setting method is as follows Figure 7 As shown; at the same time, in order to increase the fault tolerance of the power generation unit, the number of pole pairs of the primary module and the secondary part 31 must be kept consistent, and the pole moments of the primary module and the secondary part 31 can adopt unequal pole moments, which can reduce the harmonics of the power generation unit; in addition, multi-phase windings, such as six-phase, twelve-phase, etc., can also be used to further increase the fault tolerance of the power generation unit; the primary module adopts a modular structure, which is simple and easy to maintain. At the same time, the number of motor poles can be freely increased or decreased, and the primary / secondary pole pitch of the motor can be adjusted, which can be suitable for wave generators with different capacity requirements.

[0052] In this embodiment, there are two primary windings 33, which are respectively wound on the teeth of the primary core 32, that is, on two opposite sides of the primary core 32, or there is one primary winding 33, which is wound on the yoke of the primary core 32, that is, on the side of the primary core 32 opposite to the secondary part 31. The primary winding 33 can be one or two, and can be changed according to the demand for power generation capacity, so that the power generation capacity of a single power generation unit can be flexibly adjusted.

[0053] In this embodiment, the power generation mechanism further includes a secondary support frame 41 and a primary support frame 42, at least one secondary part 31 is fixed on the secondary support frame 41, and at least one primary part is fixed on the primary support frame 42. By moving one of the secondary support frame 41 or the primary support frame 42 and keeping the other stationary, the secondary part 31 and the primary part in the power generation unit can move relative to each other, thereby generating electricity. It can be understood that as an alternative embodiment, the secondary support frame 41 and the primary support frame 42 can also move relative to each other at the same time.

[0054] Specifically, there is no limitation on the specific structures of the secondary support frame 41 and the primary support frame 42, and they can be changed accordingly according to the arrangement of the power generation units in the power generation mechanism.

[0055] In this embodiment, at least two power generation units are arranged in a circumferential direction, or at least two power generation units are arranged in a direction perpendicular to the moving direction of the primary part or the secondary part 31. The arrangement of the power generation units is flexible and can effectively meet the different structural requirements of the power generation mechanism.

[0056] Specifically, Figure 8 As shown in FIG. 1 , it is a schematic diagram of a bilateral arrangement of power generation units, in which the secondary parts 31 of the two power generation units are fixed on a secondary support frame 41, and the primary parts at both ends are fixed by different primary support frames 42 respectively; Fig. 9 and Fig.10 As shown in FIG. 1 , it is a schematic diagram of the arrangement of the four sides of the power generation unit. The secondary parts 31 of the four power generation units are fixed on a secondary support frame 41, and the primary parts located at the peripheral ends are fixed by different primary support frames 42. The setting angle between two adjacent power generation units can be selected according to the needs; Fig.11 As shown, it is a schematic diagram of a six-sided arrangement of power generation units, and the secondary parts 31 of the six power generation units are fixed on a secondary support frame 41; Fig.12 As shown, it is a schematic diagram of an eight-sided arrangement of power generation units, and the secondary parts 31 of the eight power generation units are fixed on a secondary support frame 41; Fig.13 As shown, it is a schematic diagram of a unilateral parallel arrangement of power generation units, and the secondary parts 31 of several power generation units are fixed on a secondary support frame 41; Fig.14 As shown, it is a schematic diagram of the arrangement of the secondary parts 31 of several power generation units located on the outside, the secondary part 31 of each power generation unit is fixed by the corresponding secondary support frame 41, and the primary parts of multiple power generation units are fixed by a primary support frame 42. It can be understood that as an alternative embodiment, the power generation units can also be arranged in a more side manner, and multiple power generation units can uniformly fix the secondary parts 31, or uniformly fix the primary parts, or multiple power generation units can be fixed independently. It can be understood that as an alternative embodiment, the power generation units can also be arranged in an odd number of sides, such as three sides, five sides, etc.

[0057] In this embodiment, at least two power generation units are arranged along the moving direction of the primary part or the secondary part 31. Figures 8 to 14 As shown in the figure, a plurality of power generation units are arranged circumferentially, and a plurality of power generation units may also be arranged along the extension direction of the secondary support frame 41 and the primary support frame 42.

[0058] Specifically, each power generation unit may have a longer primary part and a shorter secondary part 31, or a longer secondary part 31 and a shorter primary part. It should be noted that the length here refers to the overall length of the primary part and the secondary part 31 along their moving direction.

[0059] like Fig.15 As shown, the present invention further provides a wave generator, comprising an oscillating float 10 and a shell 20 . The wave generator further comprises the above-mentioned power generation mechanism, which is arranged inside the shell 20 .

[0060] Specifically, the wave generator also includes a rope 11, a linear slide 43, a spring 44 and a limit block 45. The oscillating float 10 is fixedly connected to the primary support frame 42 of each power generation unit through the rope 11 passing through the shell 20; the primary support frame 42 of each power generation unit is slidably matched with the linear slide 43 arranged inside the shell 20, and the upper end and the lower end of the linear slide 43 are respectively fixedly connected to the top wall and the bottom wall of the shell 20 to guide the movement of the primary support frame 42; the primary support frame 42 of the power generation unit closest to the bottom of the shell 20 is fixedly connected to the bottom wall of the shell 20 through the spring 44, so that the primary support frame 42 can be reset; a limit block 45 is also provided on the telescopic path of the spring 44 to prevent the primary support frame 42 from exceeding the preset moving range when moving. It should be noted that the arrangement of the linear guide rail 43, the spring 44 and the limit block 45 is not unique and can be changed or optimized according to actual conditions; the oscillating float 10 can also be fixedly connected to the secondary support frame 41 through the rope 11 to drive the secondary part 31 to reciprocate up and down.

[0061] In this embodiment, each power generation unit in the power generation mechanism is connected to the energy storage unit through an inverter to form an energy storage circuit, and at least two power generation units and the energy storage unit form at least two independent energy storage circuits. When the power generation mechanism operates normally, the inverter can realize energy conversion, and the multiple power generation units do not affect each other. If one or several power generation units fail, the entire power generation mechanism can still operate normally and can be uniformly inspected and maintained in the subsequent maintenance stage. It can be understood that as an alternative implementation method, multiple power generation units can also be connected to the energy storage unit through an inverter to form an energy storage circuit, and the number of power generation units in an energy storage circuit can be selected according to demand.

[0062] Specifically, each power generation unit is equipped with a current sensor and a voltage sensor, and a switch device. When a motor fails, the current sensor and the voltage sensor detect a sudden change in the current or voltage of the motor, and the switch device is used to cut off the faulty power generation unit alone without affecting the overall operation of other power generation units and the wave generator. It should be noted that when the power generation unit is disconnected, the voltage suddenly changes and the current is zero, and when the power generation unit is short-circuited, the current increases.

[0063] The present invention also provides a wave power generation system, which comprises: the above-mentioned wave generator.

[0064] Embodiment 2

[0065] like Fig.16 As shown, the difference between the wave generator of the second embodiment and the first embodiment is whether different oscillating floats 10 are used to drive the corresponding power generation unit to generate electricity. The wave generator of this embodiment is provided with multiple oscillating floats 10, each oscillating float 10 is fixedly connected to its corresponding primary support frame 42, and drives the primary part to move up and down with the waves. It should be noted that the oscillating float 10 can also be fixedly connected to the secondary support frame 41 through a rope 11 to drive the secondary part 31 to reciprocate up and down.

[0066] The following is an explanation of the usage of the wave generator of this embodiment:

[0067] Under the action of incident waves, the oscillating float 10 moves with the waves and converts wave energy into kinetic energy of the oscillating float 10. The oscillating float 10 oscillates up and down, and the kinetic energy is transmitted through the rope 11 to drive the primary support frame 42 to move up and down, thereby causing the primary part in the power generation unit to reciprocate up and down, converting the kinetic energy into electrical energy, and then storing the electrical energy in the battery or sending it to the power grid through the power electronic converter.

[0068] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0069] 1. Multiple power generation units are arranged in the power generation mechanism. Compared with the original integral generator structure, the structure of a single power generation unit is simpler and easier to maintain. Without changing the original capacity of the power generation mechanism, the capacity of a single power generation unit is greatly reduced. At the same time, the power generation units in the power generation mechanism can be increased or decreased arbitrarily according to the capacity requirements, and the arrangement of multiple power generation units can also be flexibly changed according to the structural requirements of the power generation mechanism, so that the structure of the power generation mechanism can be more diversified.

[0070] 2. The magnetic flux path in the C-shaped primary core 32 is secondary part 31-air gap-primary core 32-air gap-secondary part 31. The magnetic leakage in the entire path is small, so the secondary part 31 does not need to be provided with a back iron structure, thereby reducing the complexity of the overall structure of the power generation unit, and can also effectively reduce the weight of the power generation mechanism.

[0071] 3. The primary module adopts a modular structure, which is simple and easy to maintain. At the same time, it can freely increase or decrease the number of motor poles and adjust the primary / secondary pole pitch of the motor. It can be suitable for wave generators with different capacity requirements.

[0072] 4. At least two power generation units and the energy storage unit form at least two independent energy storage circuits. When the power generation mechanism operates normally, the multiple power generation units do not affect each other. If one or several power generation units fail, the entire power generation mechanism can still operate normally until the subsequent maintenance stage.

[0073] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A wave generator, comprising an oscillating float (10) and a housing (20), characterized in that: It also includes a power generation mechanism arranged inside the housing (20), the power generation mechanism comprising: at least two power generation units arranged according to a preset arrangement rule, each of the power generation units comprising: A primary part, having a hollow slot, the primary part comprising a plurality of primary modules, the plurality of primary modules being arranged side by side and arranged along the moving direction of the primary part, each of the primary modules comprising a primary core (32) and a plurality of primary windings (33), the primary core (32) being a C-shaped structure, the plurality of primary windings (33) being wound on the primary core (32), the number of the primary windings (33) being two, the two primary windings (33) being respectively wound on the teeth of the primary core (32), or the number of the primary winding (33) being one, the one primary winding (33) being wound on the yoke of the primary core (32); A secondary part (31) is arranged in the hollow slot and penetrates the opening of the primary core (32), an air gap is formed between the secondary part (31) and the primary part, and the primary part reciprocates relative to the secondary part (31) to generate electricity; A secondary support frame (41) and a primary support frame (42), wherein at least one secondary part (31) is fixed on the secondary support frame (41), and at least one primary part is fixed on the primary support frame (42); There are multiple oscillating floating bodies (10), and each oscillating floating body (10) is fixedly connected to its corresponding primary support frame (42), so that different oscillating floating bodies (10) drive the corresponding power generation unit to generate electricity; Wherein, at least two of the power generation units are arranged along the circumferential direction, and each power generation unit is installed with a current sensor and a voltage sensor, and a switching device.

2. The wave generator according to claim 1, characterized in that: At least two of the power generation units are arranged along a moving direction of the primary part.

3. The wave generator according to claim 1, characterized in that: Each of the power generation units in the power generation mechanism is connected to the energy storage part through an inverter to form an energy storage circuit, and at least two of the power generation units and the energy storage part form at least two independent energy storage circuits.

4. A wave power generation system, characterized in that: include: The wave generator according to any one of claims 1 to 3.

Images