Double-floating-body type wave power generation device based on linear motors

Abstract

The utility model relates to a wave power generation device, in particular to a double-floating-body type wave power generation device based on a linear motor, which comprises a first floating body, a second floating body, a linear motor rotor and a linear motor stator, when the first floating body floats up and down relative to the second floating body under the action of wave energy, the first floating body drives the linear motor rotor to move in the axial direction of the linear motor stator to generate power while moving in the axial direction of the extension part. By means of the linear motor, wave energy can be directly converted into electric energy, a complex mechanical transmission structure is not needed, and therefore energy loss is reduced, and energy conversion efficiency is improved. The first floating body is provided with a first through hole, the second floating body comprises an extension part, and the first floating body and the second floating body are movably connected, so that the whole device can keep good stability in waves, device shaking caused by wave changes is reduced, and stability and reliability of energy conversion are guaranteed.

Description

Technical Field

[0001] The utility model relates to a wave power generation device, in particular to a double-floating body wave energy power generation device based on a linear motor. Background Art

[0002] With the increasing global demand for renewable energy, wave energy has attracted significant attention as a key form of marine energy. However, traditional wave energy conversion devices are often limited by wave direction, frequency, and amplitude, and struggle to maintain stability in complex marine environments. To address this challenge, twin-floating wave energy generators have emerged.

[0003] The core structure of a twin-floating wave energy generator consists of two independent floats connected by a mechanical structure. When waves pass by, the two floats move relative to each other. This relative motion is converted into mechanical energy through a specific transmission mechanism, which in turn drives a generator to generate electricity.

[0004] Compared to traditional wave energy conversion devices, twin-float wave energy generators offer significant advantages. First, the twin-float design allows for more efficient capture of wave energy, maintaining high energy conversion efficiency regardless of wave direction, frequency, and amplitude. Second, the twin-float structure enhances the device's stability, enabling stable operation even in complex marine environments.

[0005] Furthermore, the dual-floating wave energy generator boasts excellent environmental adaptability. Because the main body of the device floats on the sea surface, it can move naturally with the waves, eliminating the need for fixed positions. This allows for greater flexibility in layout and installation, allowing it to adapt to varying marine environments and seabed topography.

[0006] However, the existing double-floating wave energy power generation device has a relatively complex intermediate transmission link and consumes a lot of energy. Utility Model Content

[0007] (1) Purpose of the utility model

[0008] The purpose of the utility model is to provide a double-floating wave energy power generation device based on a linear motor with a simple structure and low energy consumption.

[0009] (2) Technical solution

[0010] In order to solve the above problems, the utility model provides a double-floating wave energy power generation device based on a linear motor, the double-floating wave energy power generation device comprising: a first floating body, a second floating body, a linear motor mover and a linear motor stator;

[0011] The first floating body is provided with a first through hole, and the second floating body includes an extension portion, the extension portion passes through the first through hole and is rollingly connected to the first floating body;

[0012] The linear motor mover is fixedly connected to the first floating body;

[0013] The linear motor stator is arranged inside the extension portion;

[0014] The linear motor stator is coaxially sleeved on the outer periphery of the linear motor mover;

[0015] When the first floating body moves relative to the second floating body, the linear motor mover moves relative to the linear electronic stator to generate electrical energy.

[0016] In another aspect of the present invention, preferably, the power generation device further comprises a first connecting member;

[0017] The first floating body and the fixed end of the linear motor mover are fixedly connected via the first connecting member;

[0018] The fixed end of the linear motor mover is arranged outside the first floating body;

[0019] The fixed end of the linear motor mover is closer to the upper surface of the first floating body;

[0020] The fixed end of the linear motor mover is fixed at a position with a first distance from the upper surface of the first floating body through the first connecting member;

[0021] The first spacing is the axial distance that the first floating body floats up and down relative to the second floating body.

[0022] In another aspect of the present invention, preferably, the first connecting member includes a horizontal rod and a vertical rod;

[0023] The fixed end of the linear motor mover is fixedly connected to the cross bar;

[0024] The vertical rod is fixedly connected to the horizontal rod;

[0025] The vertical rod fixes the cross bar at a position with a second distance from the upper surface of the first floating body;

[0026] The fixed end of the linear motor mover is fixed to a position with a first distance therebetween from the upper surface of the first floating body through the cross bar.

[0027] In another aspect of the present invention, preferably,

[0028] The vertical rods include at least two;

[0029] One end of the vertical rod is connected to the upper surface of the first floating body, and the other end of the vertical rod is connected to the cross rod;

[0030] At least two vertical rods are symmetrically arranged on both sides of the first through hole;

[0031] A second through hole is provided on the upper surface of the extension portion;

[0032] The linear motor mover passes through the second through hole and is coaxially sleeved with the linear motor stator.

[0033] In another aspect of the present invention, preferably, a dynamic sealing component is provided between the second through hole and the linear motor mover, and the dynamic sealing component prevents liquid from entering the extension portion while ensuring the axial movement of the linear motor mover relative to the linear motor stator.

[0034] In another aspect of the present invention, preferably, the power generation device further includes a second connecting member.

[0035] The second connecting member is disposed between the extension portion and an opposite surface of the first floating body;

[0036] The extension portion is movably connected to the first floating body via the second connecting member;

[0037] When the first float moves axially along the extension portion, it is guided by the second connecting member.

[0038] In another aspect of the present invention, preferably,

[0039] The second connecting member includes a rolling portion and a guiding portion;

[0040] The guide portion is provided on the outer wall of the extension portion, and the guiding direction of the guide portion is parallel to the moving direction of the linear motor mover;

[0041] The rolling portion is fixedly connected to the side wall of the first through hole;

[0042] When the first floating body moves axially along the extension portion, the position of the rolling portion relative to the first floating body remains unchanged, and the first floating body drives the rolling portion to move along the guide direction in cooperation with the guide portion.

[0043] In another aspect of the present invention, preferably, the rolling portion is configured as a roller, and the guide portion is configured as a roller groove;

[0044] The shaft of the roller is fixedly connected to the side wall of the first through hole;

[0045] The roller groove is provided on the outer wall of the extension portion;

[0046] The roller is adapted to the roller groove;

[0047] When the first floating body moves axially along the extension portion, the position of the roller relative to the first floating body remains unchanged, and the first floating body drives the roller to roll in the roller groove along the guide direction.

[0048] In another aspect of the present invention, preferably, the power generation device further includes a linear bearing, which is arranged inside the extension portion, and the movable end of the linear motor mover passes through the linear bearing, and the linear bearing guides the linear motor mover to move along its own axial direction.

[0049] In another aspect of the present invention, preferably, the power generation device further includes a brake component, the brake component is arranged inside the extension portion, the linear motor mover passes through the brake component, and the brake component stops the first floating body by holding the linear motor mover.

[0050] (3) Beneficial effects

[0051] The above technical solution of the utility model has the following beneficial technical effects:

[0052] The utility model, through the design of a linear motor, can directly convert wave energy into electrical energy without going through a complex mechanical transmission structure, thereby reducing energy loss and improving energy conversion efficiency. The first float has a first through hole, and the second float includes an extension. The two are movably connected, so that the entire device can maintain good stability in the waves, reduce the shaking of the device caused by wave changes, and ensure the stability and reliability of energy conversion. Because the first float moves axially along the extension of the second float, the device can adapt to waves of different directions, frequencies and amplitudes. Even in complex marine environments, the device can work effectively, which improves its scope of application and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the utility model;

[0054] Figure 2 is a cross-sectional view of a first floating body, an extension portion, and a second connecting member according to an embodiment of the present invention;

[0055] Figure 3 1 is a cross-sectional view of a linear bearing and a brake component according to an embodiment of the present invention;

[0056] Reference numerals:

[0057] 1: The first floating body, 1-1: The first through hole,

[0058] 2: Second floating body, 2-1: Extension, 2-2: Second through hole,

[0059] 3: Linear motor mover,

[0060] 4: Linear motor stator,

[0061] 5: first connecting member, 5-1: horizontal bar, 5-2: vertical bar,

[0062] 6: Second connecting member, 6-1: Rolling portion, 6-2: Guide portion, 6-3: Roller, 6-4: Roller groove,

[0063] 7: Linear bearings,

[0064] 8: Braking components;

[0065] 9. Dynamic sealing components. DETAILED DESCRIPTION

[0066] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0067] The accompanying drawings illustrate schematic diagrams of layer structures according to embodiments of the present invention. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely illustrative and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions based on actual needs.

[0068] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0070] 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.

[0071] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.

[0072] Example 1

[0073] A double-floating wave energy power generation device based on a linear motor. Figure 1 Shows a cross-sectional view of the overall structure of an embodiment of the utility model; Figure 2 FIG1 shows a cross-sectional view of a first floating body, an extension portion, and a second connecting member according to an embodiment of the present invention; ... Figure 1 and Figure 2 As shown,

[0074] It includes: a first floating body 1, a second floating body 2, a linear motor mover 3 and a linear motor stator 4;

[0075] The first floating body 1 is provided with a first through hole 1-1; the first floating body 1 is a closed structure with a cavity inside. The specific shape of the first floating body 1 is not limited here, and can be a regular shape such as a cylinder, a rectangle, or an irregular shape such as a water drop. In this embodiment, the first floating body 1 is a cylinder, and the first through hole 1-1 is provided at the center of the first floating body 1 on the upper and lower surfaces. The first through hole 1-1 runs through the upper and lower surfaces of the first floating body 1;

[0076] The second floating body 2 includes an extension portion 2-1. The second floating body 2 includes a disc portion and the extension portion 2-1. The extension portion 2-1 is arranged on one end surface of the disc portion and is perpendicular to the end surface of the disc portion. The disc portion is opposite to the lower surface of the first floating body 1.

[0077] The extension portion 2-1 passes through the first through hole and is connected to the first floating body 1 in a rolling manner; the movable connection here means that the two can maintain relative motion;

[0078] The linear motor mover 3 is fixedly connected to the first float 1. The specific method of fixing the linear motor mover 3 to the first float 1 is not limited here. In this embodiment, it is achieved through the first connecting member 5. The first float 1 and the fixed end of the linear motor mover 3 are fixedly connected through the first connecting member 5. The first connecting member 5 sets the fixed end of the linear motor mover 3 outside the first float 1 and keeps the fixed end of the linear motor mover 3 close to the upper surface of the first float 1. The fixed end of the linear motor mover 3 is fixed to a position with a first spacing from the upper surface of the first float 1 by the first connecting member 5. The first spacing is the axial distance between the first float 1 and the upper surface of the second float 2. The first connecting member 5 not only provides a fixed connection between the linear motor mover 3 and the first float 1, but also plays a role in positioning and supporting. It ensures that the fixed end of the linear motor mover 3 always has a first spacing from the upper surface of the first float 1 during the floating process. The first spacing is the maximum distance that the first float 1 floats up and down relative to the second float 2. In actual use, the relative movement between the two will be smaller than the first spacing. The first spacing is designed according to actual application requirements to ensure that the linear motor mover 3 can work normally within this distance range.

[0079] Furthermore, in this embodiment, the first connecting member 5 includes a horizontal bar 5-1 and a vertical bar 5-2; the fixed end of the linear motor mover 3 is fixedly connected to the horizontal bar 5-1; the vertical bar 5-2 is fixedly connected to the horizontal bar 5-1; the vertical bar 5-2 fixes the horizontal bar 5-1 at a position with a second distance from the upper surface of the first float 1; the fixed end of the linear motor mover 3 is fixed to a position with a first distance from the upper surface of the first float 1 through the horizontal bar 5-1. The horizontal bar 5-1 here can be kept parallel to or at an angle to the upper surface of the first floating body 1, and the vertical bar 5-2 can be kept perpendicular to or at an angle to the upper surface of the first floating body 1. In this embodiment, the horizontal bar 5-1 is kept parallel to the upper surface of the first floating body 1, and the vertical bar 5-2 is kept perpendicular to the upper surface of the first floating body 1. Under the action of wave energy, when the first floating body 1 moves downward, the extension 2-1 will pass through the first through hole 1-1, and the horizontal bar 5-1 is kept parallel to the upper surface of the first floating body 1, and the vertical bar 5-2 is kept perpendicular to the upper surface of the first floating body 1, which can avoid the collision of the vertical bar 5-2 and the horizontal bar 5-1 with the extension 2-1.

[0080] Furthermore, the vertical rods 5-2 include at least two rods; one end of the vertical rod 5-2 is connected to the upper surface of the first floating body 1, and the other end of the vertical rod 5-2 is connected to the cross rod 5-1; at least two vertical rods are symmetrically arranged on both sides of the first through hole; the two sides here refer to the left and right sides of the upper end surface of the first through hole, forming a frame-shaped structure across the first through hole 1-1;

[0081] The linear motor stator 4 is arranged inside the extension part 2-1 and is coaxially sleeved on the outer periphery of the linear motor mover 3. A second through hole 2-2 is provided on the upper surface of the extension part 2-1. The linear motor mover 3 passes through the second through hole 2-2 and is coaxially sleeved with the linear motor stator 4.

[0082] When the first floating body 1 moves relative to the second floating body 2, the linear motor mover 3 moves relative to the linear electronic stator 4 to generate electrical energy, and the second floating body 2 is pulled and kept stationary. When the first floating body 1 floats up and down relative to the second floating body 2 under the action of wave energy, the first floating body 1 moves axially along the extension part 2-1 while driving the linear motor mover 3 to move axially along the linear motor stator 4 to generate electricity.

[0083] Those skilled in the art will appreciate that the first connecting member 5 may also be other structures, such as a tripod structure having three support rods extending from the upper surface of the first floating body 1 and connected to or supporting the fixed end of the linear motor mover 3 at the top. A cantilever structure extending from one side of the first floating body 1, with its end connected to the fixed end of the linear motor mover 3, etc.

[0084] This embodiment, through the design of a linear motor, can directly convert wave energy into electrical energy without going through a complex mechanical transmission structure, thereby reducing energy loss and improving energy conversion efficiency. The first float has a first through hole, and the second float includes an extension. The two are movably connected, so that the entire device can maintain good stability in the waves, reduce the shaking of the device caused by wave changes, and ensure the stability and reliability of energy conversion. Because the first float moves axially along the extension of the second float, the device can adapt to waves of different directions, frequencies and amplitudes. Even in complex marine environments, the device can work effectively, which improves its scope of application and practicality.

[0085] In one embodiment of the present invention, a dynamic sealing member 9 is further provided between the second through hole 2-2 and the linear motor mover 3. The dynamic sealing member 9 prevents liquid from entering the interior of the extension portion (2-1) while ensuring axial movement of the linear motor mover 3 relative to the linear motor stator 4. The dynamic sealing member 9 can be a series of sealing rings respectively fixed to the edges of the second through hole 2-2, or a soft packing seal, such as a packing woven from relatively soft linear materials such as packing, which fills the gap between the linear motor mover 3 and the second through hole 2-2.

[0086] In one embodiment of the present invention, the power generation device further includes a second connecting member 6 disposed between opposing surfaces of the extension portion 2-1 and the first floating body 1. The extension portion 2-1 and the first floating body 1 are movably connected via the second connecting member 6. When the first floating body 1 moves axially along the extension portion 2-1, it is guided by the second connecting member 6 to prevent relative rotation between the extension portion 2-1 and the first floating body 1. Specifically, the second connecting member 6 includes a rolling portion 6-1 and a guide portion 6-2. The guide portion 6-2 is disposed on the outer wall of the extension portion 2-1, and its guiding direction is parallel to the direction of movement of the linear motor rotor 3. The rolling portion 6-1 is fixedly connected to the side wall of the first through-hole. When the first floating body 1 moves axially along the extension portion 2-1, the position of the rolling portion 6-1 relative to the first floating body 1 remains unchanged. The first floating body 1 drives the rolling portion 6-1 to move along the guiding direction in cooperation with the guide portion 6-2. The provision of the second connecting member 6 ensures a more stable and efficient connection between the extension portion 2-1 and the first floating body 1. In marine environments, the complexity and variability of waves can cause unnecessary rotational movement between the floating bodies, which not only affects power generation efficiency but can also damage the equipment. The coordination between the rolling portion 6-1 and the guide portion 6-2 ensures that the first floating body 1 can only move axially in the direction guided by the guide portion 6-2, thus ensuring the stability and reliability of the power generation device. Furthermore, the rolling portion 6-1 is configured as a roller 6-3, and the guide portion 6-2 is configured as a roller groove 6-4; the roller groove 6-4 can be fixed to the outer wall of the extension portion 2-1 by welding, or can be a groove directly opened on the outer wall of the extension portion 2-1; the axis of the roller 6-3 is fixedly connected to the side wall of the first through hole; the roller groove 6-4 is provided on the outer side wall of the extension portion 2-1; the roller 6-3 is adapted to the roller groove 6-4, not only in position but also in size; when the first float 1 moves axially along the extension portion 2-1, the position of the roller 6-3 relative to the first float 1 remains unchanged, and the first float 1 drives the roller 6-3 to roll along the guide direction in the roller groove 6-4. The specific number of rollers 6-3 and roller grooves 6-4 is not limited here, such as Figure 1 and Figure 2 As shown, two roller grooves 6-4 are symmetrically arranged on the outer wall of the extension part 2-1, each roller groove 6-4 corresponds to two rollers 6-3, and the extension part 2-1 can be composed of multiple cylinders connected by flanges. The extension part 2-1 is debugged during the installation process and the overall diameter is the same. Driven by the first float of the roller 6-3, the movement range will not exceed the axial size of the roller groove 6-4.

[0087] Those skilled in the art will appreciate that the second connecting member 6 may also be a gear rack or gear chain structure. The gear is provided on the side wall of the first through hole, and the rack or chain is provided on the outer side wall of the extension portion 2-1 for guidance.

[0088] In one embodiment of the present invention, the power generation device further includes a linear bearing 7 disposed within the extension portion 2-1. The movable end of the linear motor mover 3 extends through the linear bearing 7, and the linear bearing 7 guides the linear motor mover 3 in its own axial motion. The linear bearing 7 primarily guides the linear motor mover 3 in its own axial motion, thereby reducing displacement and shaking of the mover during motion and ensuring that the linear motor mover can smoothly and accurately reciprocate under the action of wave energy.

[0089] In one embodiment of the present invention, the power generation device further includes a brake member 8 disposed within the extension portion 2-1. The linear motor mover 3 extends through the brake member 8. The brake member 8 brakes the first floating body 1 by gripping the linear motor mover 3. The brake member 8 can be controlled by an internal hydraulic system. In an emergency or when power generation needs to be stopped, the brake member 8 can quickly and effectively stop the first floating body 1, preventing damage to the equipment or other safety hazards.

[0090] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

[0091] While the above description does not provide detailed technical details regarding patterning and etching of each layer, those skilled in the art will appreciate that various conventional methods can be used to form layers, regions, and the like in desired shapes. Furthermore, those skilled in the art may devise methods that differ from those described above to achieve the same structure.

[0092] The present invention has been described above with reference to its embodiments. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Those skilled in the art may make various substitutions and modifications without departing from the scope of the present invention, and such substitutions and modifications are intended to fall within the scope of the present invention.

[0093] Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.

[0094] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A double-floating wave energy power generation device based on a linear motor, characterized in that: The double-floating wave energy power generation device comprises: a first floating body (1), a second floating body (2), a linear motor mover (3) and a linear motor stator (4); The first floating body (1) is provided with a first through hole (1-1), and the second floating body (2) includes an extension portion (2-1), wherein the extension portion (2-1) passes through the first through hole (1-1) and is rollingly connected to the first floating body (1); The linear motor mover (3) is fixedly connected to the first floating body (1), the linear motor stator (4) is arranged inside the extension part (2-1), and the linear motor stator (4) is coaxially sleeved on the linear motor mover (3); When the first floating body (1) moves relative to the second floating body (2), the linear motor mover (3) moves relative to the linear electronic stator (4) to generate electrical energy.

2. The power generation device according to claim 1, characterized in that: The power generation device further comprises a first connecting member (5); The first floating body (1) and the fixed end of the linear motor mover (3) are fixedly connected via the first connecting member (5); The fixed end of the linear motor mover (3) is arranged outside the first floating body (1); The fixed end of the linear motor mover (3) is relatively close to the upper surface of the first floating body (1); The fixed end of the linear motor mover (3) is fixed at a position with a first distance from the upper surface of the first floating body (1) through the first connecting member (5); The first spacing is the axial distance between the first floating body (1) and the second floating body (2).

3. The power generation device according to claim 2, characterized in that: The first connecting member (5) comprises a horizontal rod (5-1) and a vertical rod (5-2); The fixed end of the linear motor mover (3) is fixedly connected to the crossbar (5-1); The vertical rod (5-2) is fixedly connected to the horizontal rod (5-1); The vertical rod (5-2) fixes the horizontal rod (5-1) at a position with a second distance from the upper surface of the first floating body (1); The fixed end of the linear motor mover (3) is fixed to a position with a first distance between it and the upper surface of the first floating body (1) via the crossbar (5-1).

4. The power generation device according to claim 3, characterized in that: The vertical rods (5-2) include at least two; One end of the vertical rod (5-2) is connected to the upper surface of the first floating body (1), and the other end of the vertical rod (5-2) is connected to the horizontal rod (5-1); At least two vertical rods are symmetrically arranged on both sides of the first through hole (1-1); A second through hole (2-1) is provided on the upper surface of the extension portion (2-1); The linear motor mover (3) passes through the second through hole and is coaxially sleeved with the linear motor stator (4).

5. The power generation device according to claim 4, characterized in that: A dynamic sealing component (9) is provided between the second through hole (2-1) and the linear motor mover (3), and the dynamic sealing component (9) prevents liquid from entering the interior of the extension portion (2-1) while ensuring the axial movement of the linear motor mover (3) relative to the linear motor stator (4).

6. The power generation device according to claim 1, characterized in that: The power generation device further comprises a second connecting member (6), The second connecting member (6) is arranged between the extending portion (2-1) and the opposite surface of the first floating body (1); The extension portion (2-1) is movably connected to the first floating body (1) via the second connecting member (6); When the first floating body (1) moves axially along the extension portion (2-1), it is guided by the second connecting member (6).

7. The power generation device according to claim 6, characterized in that: The second connecting member (6) comprises a rolling portion (6-1) and a guiding portion (6-2); The guide portion (6-2) is arranged on the outer wall of the extension portion (2-1), and the guiding direction of the guide portion (6-2) is parallel to the moving direction of the linear motor mover (3); The rolling portion (6-1) is fixedly connected to the side wall of the first through hole (1-1); When the first floating body (1) moves axially along the extension portion (2-1), the position of the rolling portion (6-1) relative to the first floating body (1) remains unchanged, and the first floating body (1) drives the rolling portion (6-1) to move along the guide direction in cooperation with the guide portion (6-2).

8. The power generation device according to claim 1, characterized in that: The rolling portion (6-1) is configured as a roller (6-3), and the guiding portion (6-2) is configured as a roller groove (6-4); The shaft of the roller (6-3) is fixedly connected to the side wall of the first through hole (1-1); The roller groove (6-4) is provided on the outer wall of the extension portion (2-1); The roller (6-3) is adapted to the roller groove (6-4); When the first floating body (1) moves axially along the extension portion (2-1), the position of the roller (6-3) relative to the first floating body (1) remains unchanged, and the first floating body (1) drives the roller (6-3) to roll along the guide direction in the roller groove (6-4).

9. The power generation device according to claim 1, characterized in that: The power generation device further comprises a linear bearing (7), wherein the linear bearing (7) is arranged inside the extension portion (2-1), the movable end of the linear motor mover (3) passes through the linear bearing (7), and the linear bearing (7) guides the linear motor mover (3) to move along its own axial direction.

10. The power generation device according to claim 1, characterized in that: The power generation device also includes a brake component (8), which is arranged inside the extension part (2-1), and the linear motor mover (3) passes through the brake component (8). The brake component (8) stops the first floating body (1) by holding the linear motor mover (3).

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