Lever-type mechanical rectifying sea wave energy capturing device

Abstract

This invention discloses a lever-type mechanical rectification wave energy capture device, comprising: a power extraction device, a lever support frame, a lever assembly, and a buoy assembly; one end of the lever assembly is connected to the buoy assembly, and the other end is connected to the power extraction device; the lever assembly uses the roller of the lever support frame as a fulcrum to transmit the motion of the buoy assembly in a direction perpendicular to the sea surface to the power extraction device; the power extraction device rectifies the reciprocating linear mechanical motion into unidirectional rotational motion, realizing the rotational power generation of the generator in the power extraction device. This invention has a compact structure and ingenious design, and can be used to capture the mechanical energy of ocean waves and convert mechanical energy into electrical energy, reducing manufacturing and maintenance costs.

Description

Technical Field

[0001] This invention relates to a lever-type mechanical rectifier wave energy capture device, belonging to the field of mechanical equipment. Background Technology

[0002] While the development of science and technology has brought benefits to human society, it has also caused significant damage to the ecological environment upon which we depend for survival. Developing and utilizing renewable and clean wave energy can alleviate problems such as resource shortages and environmental pollution. Based on global wind and wave models verified and calibrated using satellite altimeter data and buoy data from the world wave database, the estimated global wave energy output is 32,000 TWh per year. Wave energy has minimal environmental impact during development and exists in the form of mechanical energy. Therefore, to reduce carbon emissions and improve the global ecological environment, developing conversion technologies for wave energy—a stable, safe, and pollution-free clean energy source—has significant research implications for social and scientific development.

[0003] The main types of wave energy capture devices include oscillating water column type, overtopping type, attenuation type, and point absorption type. Oscillating water column type and overtopping type technologies are mature and have been widely used around the world. Compared with traditional oscillating water column type wave energy capture devices, point absorption type wave energy capture devices are smaller, simpler in structure, and easier to control. More and more scholars are focusing their attention on point absorption type wave energy capture devices.

[0004] Existing point-absorption wave energy capture methods mostly use hydraulic or pneumatic transmission. Hydraulic or pneumatic cylinders convert the captured linear reciprocating motion into unidirectional rotational motion through a rectified loop. However, the rectified loop requires numerous one-way valves and pipes, resulting in a complex, bulky structure prone to leakage. Therefore, to alleviate the limitations of experimental conditions and application scenarios for wave energy capture devices, a wave energy capture device using a ball screw and one-way clutch for mechanical rectification was designed. Furthermore, a lever support amplifies the input force, avoiding the challenge of a completely sealed power extraction device operating underwater. This design is significant for the application of subsequent power generation maximization control methods in practical wave energy power generation. Summary of the Invention

[0005] The present invention provides a lever-type mechanical rectifier wave energy capture device for capturing the mechanical energy of waves and converting the mechanical energy into electrical energy.

[0006] The technical solution of the present invention is: a lever-type mechanical rectification wave energy capture device, comprising: a power extraction device 1, a lever support frame 2, a lever assembly 3, and a buoy assembly 4; one end of the lever assembly 3 is connected to the buoy assembly 4, and the other end of the lever assembly 3 is connected to the power extraction device 1; the lever assembly 3 uses the roller 209 of the lever support frame 2 as a fulcrum to transmit the motion of the buoy assembly 4 in a direction perpendicular to the sea surface to the power extraction device 1; the reciprocating linear motion is mechanically rectified into unidirectional rotational motion by the power extraction device 1, thereby realizing the rotational power generation of the generator 118 in the power extraction device 1.

[0007] The power extraction device 1 includes a gear assembly 110, a lead screw assembly 120, a linear bearing 105, and a connecting shaft extension shaft 107. One end of the lead screw connecting shaft 129 in the lead screw assembly 120 passes through the linear bearing 105 and is connected to one end of the lever assembly 3 via the connecting shaft extension shaft 107. The output shafts of the left-hand ball screw 123 and the right-hand ball screw 125 in the lead screw assembly 120 are concentrically fixed with the corresponding one-way clutches 116 in the gear assembly 110. Through the cooperation of the gear assembly 110 and the lead screw assembly 120, the reciprocating linear motion is rectified into unidirectional rotational motion, thereby realizing the rotational power generation of the generator 118 in the gear assembly 110.

[0008] The gear assembly 110 includes a first bearing housing 111, a motor-position gear support shaft 112, a lead screw-position gear support shaft 113, a motor-position gear 114, a lead screw-position gear 115, a one-way clutch 116, and a generator 118. One motor-position gear support shaft 112 and two lead screw-position gear support shafts 113 are respectively connected to a first bearing housing 111. One motor-position gear 114 and two lead screw-position gears 115 are respectively fixed to the upper end of the platforms of the motor-position gear support shaft 112 and the lead screw-position gear support shaft 113. The two lead screw-position gears 115 mesh with the motor-position gear 114, and there is a gap between the two lead screw-position gears 115. The one-way clutch 116 is fixed inside the gear inner holes of the two lead screw-position gears 115, and the rotating shaft of the generator 118 is concentrically fixed with the gear inner hole of the motor-position gear 114.

[0009] The lead screw assembly 120 includes a second bearing housing 121, a third bearing housing 122, a left-hand ball screw 123, a left-hand ball nut 124, a right-hand ball screw 125, a right-hand ball nut 126, an upper fastening plate 127 for the nut, a lower fastening plate 128 for the nut, a lead screw connecting shaft 129, and a connecting shaft limiting ring 130. The left-hand ball screw 123 and the right-hand ball screw 125 are parallel to each other. The positioning shafts at both ends of the left-hand ball screw 123 and the right-hand ball screw 125 are concentrically fixed to the bearings of the second bearing housing 121 and the third bearing housing 122, respectively. The output ends of the left-hand ball screw 123 and the right-hand ball screw 125... The gear assembly 110 is concentrically fixed with the corresponding one-way clutch 116; the left-hand ball nut 124 is installed on the threaded shaft of the left-hand ball screw 123, and the right-hand ball nut 126 is installed on the threaded shaft of the right-hand ball screw 125; the upper end fastening plate 127 and the lower end fastening plate 128 of the nut are fixed on the upper end face and the lower end face of the left-hand ball nut 124 and the right-hand ball nut 126, respectively; the screw connecting shaft 129 passes through the upper end fastening plate 127 and the lower end fastening plate 128 of the nut and is fixed by the connecting shaft limiting ring 130, and the screw connecting shaft 129 is concentrically engaged with the middle hole of the upper end fastening plate 127 and the lower end fastening plate 128 of the nut.

[0010] The lever support frame 2 includes a support frame body, a profile bearing 206, a roller 209, and a roller limiting ring 210; wherein, the two ends of the roller 209 are fixed to the profile bearing 206 on both sides of the upper end of the support frame body by the roller limiting ring 210, and the lever assembly 3 is installed on the roller 209.

[0011] The lever assembly 3 includes a lever shaft 301, a lever limiting ring 302, a double-hole shaft support 303, a cross shaft support 304, and a slider hinge assembly 310. The two lever shafts 301 are arranged in parallel, and their relative positions are fixed by the double-hole shaft supports 303 at both ends. The lever limiting ring 302 is fixed at both ends of the lever shaft 301, and both ends of the lever shaft 301 cooperate with the slider hinge assembly 310. The slider hinge assembly 310 at both ends slides along the axial direction of the lever shaft 301 within the range between the lever limiting ring 302 and the double-hole shaft support 303. The lever shaft 301 is fixed on the roller 209 by two cross shaft supports 304.

[0012] The slider hinge assembly 310 includes a box-type unit slider 311, a slider connector 312, a hinge 313, and a threaded shaft 314; two sliders 311 are fixed parallel to each other on the upper end of the slider connector 312 and there is a gap between the two sliders 311; the fixed end of the hinge 313 is connected to the lower end of the slider connector 312, and the rotation axis of the hinge 313 is perpendicular to the central axis of the two sliders 311; the threaded shaft 314 is connected to the movable end of the hinge 313.

[0013] The buoy assembly 4 includes a main buoy 401, a secondary buoy 402, a buoy shaft 404, a counterweight 405, a buoy shaft limiting ring 406, and a buoy rigid coupling 407. The inner hole of the main buoy 401 is coaxially fitted with the buoy shaft 404, and the upper and lower ends of the main buoy 401 are fixed by the first set of buoy shaft limiting rings 406. The inner hole of the secondary buoy 402 is coaxially fitted with the buoy shaft 404 below the main buoy 401, and the upper and lower ends of the secondary buoy 401 are fixed by the second set of buoy shaft limiting rings 406. The counterweight 405 is fixedly connected to the lower end of the buoy shaft 404 by the third set of buoy shaft limiting rings 406. The buoy rigid coupling 407 is concentrically fitted with the buoy shaft 404 and fixed at the upper end of the buoy shaft 404. The buoy shaft 404 is fixed to the slider hinge assembly 310 in the lever assembly 3 through the buoy rigid coupling 407.

[0014] The mass of the buoy assembly after counterweighting meets the following requirements:

[0015]

[0016] In the formula, m f The mass of the buoy assembly after counterweighting is given, with a magnification ratio of u > 1, where g represents the unit of gravity, and F... f This indicates the input force of buoy assembly 4;

[0017] Establish the relationship between the buoyancy of the main buoy and the auxiliary buoy in the buoy assembly:

[0018]

[0019] In the formula, F m The buoyancy of the main buoy, F a This refers to the buoyancy of the secondary buoy.

[0020] The beneficial effects of this invention are: This invention has a compact structure and ingenious design, enabling it to capture the mechanical energy of ocean waves and convert it into electrical energy, thus reducing manufacturing and maintenance costs. Specifically, this invention mainly consists of four parts: a power extraction device, a lever support frame, a lever assembly, and a buoy assembly. First, the power extraction device uses two sets of ball screws with different rotation directions and a one-way clutch to convert the linear reciprocating motion of the ocean waves into the unidirectional rotational motion of the generator, avoiding reverse rotation of the generator. The gear assembly is designed with three gears meshing in pairs on the same plane, making the power extraction device compact; the gears act as inertia containers, storing inertial forces to reduce dead zones and vibrations, etc., non-smooth dynamics. Furthermore, the outer shell of the power extraction device mainly adopts a stainless steel welded frame design, with a hollow structure on both sides in the middle of the shell for easy installation and disassembly. Second, the lever support frame mainly adopts a frame structure built of aluminum alloy profiles, with corner fittings connecting most of the aluminum alloy profiles, facilitating the disassembly and assembly of the entire experimental platform. Third, this application designs a slider hinge assembly, using a slider and a movable hinge... This allows the power extraction device and buoy assembly to move horizontally along the lever axis and in the pitch direction around the hinge, ensuring that the positions of the power extraction device and buoy assembly on the horizontal plane do not change with the movement of the lever axis. Fourth, this application designs a buoy assembly. By setting a counterweight, the buoy assembly has sufficient gravity to sink. By setting an auxiliary buoy that is always submerged underwater, the weight of the counterweight set to drive the power extraction device is compensated, so that the buoy assembly has sufficient buoyancy to float upward, allowing the main buoy to reciprocate in a direction perpendicular to the sea level with the fluctuation of the waves. Attached Figure Description

[0021] Figure 1 This is an assembly diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the power extraction device of the present invention;

[0023] Figure 3 This is a partial schematic diagram of the power extraction device of the present invention. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of gear meshing in the gear assembly of the present invention;

[0025] Figure 5 This is a schematic diagram of the gear assembly support of the present invention;

[0026] Figure 6 This is a schematic diagram of the gear assembly of the present invention;

[0027] Figure 7 This is a partial schematic diagram of the power extraction device of the present invention. Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the lead screw assembly of the present invention;

[0029] Figure 9 This is a schematic diagram of the lever support frame of the present invention;

[0030] Figure 10 This is a partial schematic diagram of the lever support frame of the present invention. Figure 1 ;

[0031] Figure 11 This is a partial schematic diagram of the lever support frame of the present invention. Figure 2 ;

[0032] Figure 12 This is a schematic diagram of the lever assembly of the present invention;

[0033] Figure 13 This is a schematic diagram of the slider hinge assembly of the present invention;

[0034] Figure 14 This is a schematic diagram illustrating the function of the connecting shaft extension shaft of the present invention;

[0035] Figure 15 This is a schematic diagram of the buoy assembly of the present invention;

[0036] The labels in the diagram are as follows: 1-Power extraction device, 2-Lever support frame, 3-Lever assembly, 4-Buoy assembly, 101-Support frame, 102-Bottom support seat, 103-Middle support body, 104-Top support cover, 105-Linear bearing, 106-Lead screw rigid coupling, 107-Connecting shaft extension shaft, 110-Gear assembly, 111-First bearing seat, 112-Motor position gear support shaft, 113-Lead screw position gear support shaft, 114-Motor position gear, 115-Lead screw position gear, 116-One-way clutch, 117-Generator bracket, 118-Generator, 120-Lead screw assembly, 121-Second bearing seat, 122-Third bearing seat, 123-Left-hand ball screw, 124-Left-hand ball nut, 125-Right-hand ball screw, 126-Right-hand ball nut, 127-Upper end fastening plate, 1 28-Lower end fastening plate of nut, 129-Screw connecting shaft, 130-Connecting shaft limiting ring, 201-Vertical beam of support frame, 202-Bottom support beam, 203-45-degree reinforcing beam of support frame, 204-Lower crossbeam of support frame, 205-Middle crossbeam of support frame, 206-Profile bearing with seat, 207-Right angle bracket of support frame, 208-135-degree angle bracket, 209-Roller, 210-Roller limiting ring, 301- Lever shaft, 302-Lever limiting ring, 303-Double hole shaft support, 304-Cross shaft support, 310-Slider hinge assembly, 311-Box-type unit slider, 312-Slider connector, 313-Hinge, 314-Threaded shaft, 401-Main buoy, 402-Secondary buoy, 403-Shim, 404-Buoy shaft, 405-Counterweight, 406-Buoy shaft limiting ring, 407-Buoy rigid coupling. Detailed Implementation

[0037] The invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of the invention is not limited to the description.

[0038] Example 1: As Figure 1-15 As shown, a lever-type mechanical rectification wave energy capture device includes: a power extraction device 1, a lever support frame 2, a lever assembly 3, and a buoy assembly 4. One end of the lever assembly 3 is connected to the buoy assembly 4, and the other end is connected to the power extraction device 1. The lever assembly 3 uses the roller 209 of the lever support frame 2 as a fulcrum to transmit the motion of the buoy assembly 4 in a direction perpendicular to the sea surface to the power extraction device 1. The power extraction device 1 mechanically rectifyes the reciprocating linear motion into unidirectional rotational motion, thereby realizing the rotational power generation of the generator 118 in the power extraction device 1. The design of the lever assembly in this invention facilitates the adjustment of the force transmission magnitude from outside the device, while also avoiding the need for sealing the device, greatly reducing manufacturing and maintenance costs.

[0039] Furthermore, such as Figure 2As shown, the power extraction device 1 includes a gear assembly 110, a lead screw assembly 120, a linear bearing 105, and a connecting shaft extension shaft 107. One end of the lead screw connecting shaft 129 in the lead screw assembly 120 passes through the linear bearing 105 and is connected to one end of the lever assembly 3 via the connecting shaft extension shaft 107. The output shafts of the left-hand ball screw 123 and the right-hand ball screw 125 in the lead screw assembly 120 are concentrically fixed with the corresponding one-way clutches 116 in the gear assembly 110. Through the cooperation of the gear assembly 110 and the lead screw assembly 120, the reciprocating linear motion is rectified into unidirectional rotary motion, thereby realizing the rotary power generation of the generator 118 in the gear assembly 110.

[0040] Furthermore, such as Figure 3-6 As shown, the gear assembly 110 includes a rhomboid first bearing seat 111, a motor-position gear support shaft 112, a lead screw-position gear support shaft 113, a motor-position gear 114, a lead screw-position gear 115, a one-way clutch 116, a generator bracket 117, and a generator 118. Three rhomboid first bearing seats 111 are fixed at corresponding positions on the upper end of the bottom support seat 102, and each rhomboid first bearing seat 111 is connected to one motor-position gear support shaft 112 and two lead screw-position gear support shafts 113, respectively. One motor-position gear 114 and two lead screw-position gears 115 are respectively fixed to the motor-position gear support shaft 112 and the lead screw. On the upper end of the support shaft 113, two lead screw gears 115 mesh with the motor gear 114 respectively, with a gap between them to allow simultaneous rotation. A one-way clutch 116 is fixed inside the gear bore of the two lead screw gears 115, with its upper end face coplanar with the upper end face of the lead screw gear 115. A generator bracket 117 is fixed inside the middle support body 103, and the generator body 118 is fixed on the generator bracket 117. The shaft of the generator 118 is concentrically fixed with the gear bore of the motor gear 114.

[0041] Furthermore, such as Figure 7-8As shown, the lead screw assembly 120 includes a second bearing seat 121, a third bearing seat 122, a left-hand ball screw 123, a left-hand ball nut 124, a right-hand ball screw 125, a right-hand ball nut 126, an upper fastening plate 127 for the nut, a lower fastening plate 128 for the nut, a lead screw connecting shaft 129, and a connecting shaft limiting ring 130; the two second bearing seats 121 and the two third bearing seats 122 are symmetrically fixed on the inner side of the central support body 103 opposite to the generator bracket 117, and the two second shafts... The bearings of bearing seat 121 and the two third bearing seats 122 are concentrically engaged with the inner holes of the two lead screw gears 115 on the bottom support seat 102; the left-hand ball screw 123 and the right-hand ball screw 125 are symmetrically arranged within the middle support body 103, and are parallel to each other, perpendicular to the upper end face of the bottom support seat 102; the positioning shafts at both ends of the left-hand ball screw 123 and the right-hand ball screw 125 are... The bearings of the left-hand ball screw 123 and the right-hand ball screw 125 are concentrically fixed to the bearings of the second bearing housing 121 and the third bearing housing 122 on both sides, respectively. The output ends of the left-hand ball screw 123 and the right-hand ball screw 125 are concentrically fixed to the corresponding one-way clutches 116 in the gear assembly 110. The left-hand ball nut 124 is installed on the threaded shaft of the left-hand ball screw 123, and the right-hand ball nut 126 is installed on the threaded shaft of the right-hand ball screw 125. The upper fastening plate 127 and the lower fastening plate 128 of the nut are fixed to the left-hand ball nut 124 and the right-hand ball screw 125. On the upper and lower end faces of the female 126; the lead screw connecting shaft 129 passes through the upper end fastening plate 127 and the lower end fastening plate 128 of the nut and is fixed by the connecting shaft limiting ring 130. The lead screw connecting shaft 129 is concentrically engaged with the central holes of the upper end fastening plate 127 and the lower end fastening plate 128 of the nut; the two connecting shaft limiting rings 130 are concentrically engaged with the lead screw connecting shaft 129, and the two connecting shaft limiting rings 130 fix the lead screw connecting shaft 129 on the upper end fastening plate 127 and the lower end fastening plate 128 of the nut. In addition, the second bearing housing 121 can be a T-type bearing housing, and the third bearing housing 122 can be a support bearing housing.

[0042] Furthermore, such as Figure 2As shown, the power extraction device 1 can be configured to include a support frame 101, a bottom support base 102, a middle support body 103, a gear assembly 110, a lead screw assembly 120, a top support cover 104, a linear bearing 105, a lead screw rigid coupling 106, and a connecting shaft extension shaft 107; the support frame 101 is fixed to the bottom support base 102; the gear assembly 110 is fixed to the upper end of the bottom support base 102; the middle support body 103 is fixed to the upper end of the bottom support base 102, and the lower edge of the middle support body 103 is flush with the bottom support base 102. The upper edges are fitted together; the top support cover 104 is fixed to the upper end of the middle support body 103, and the lower edge of the top support cover 104 is fitted with the upper edge of the middle support body 103; the linear bearing 105 is fixed at the corresponding position of the top support cover 104; the lead screw connecting shaft 129 above the lead screw assembly 120 passes through the linear bearing 105 and is concentrically fitted with the linear bearing 105; the two ends of the connecting shaft extension shaft 107 are fixed to the threaded shaft of the power extraction device 1, the lead screw connecting shaft 129, and the slider hinge assembly 310 through the lead screw rigid coupling 106. Furthermore, the diameter of the holes at both ends of the two lead screw rigid couplings 106 is adjustable, allowing for the rigid connection of two shafts with different or the same diameter. Furthermore, the length of the connecting shaft extension shaft 107 is selectable, so that the power extraction device can be applied to different situations and better play its role in power transmission.

[0043] Furthermore, such as Figure 9 As shown, the lever support frame 2 includes a support frame body, a profile bearing 206, a roller 209, and a roller limiting ring 210; wherein, the two ends of the roller 209 are fixed to the profile bearing 206 on both sides of the upper end of the support frame body by the roller limiting ring 210, and the lever assembly 3 is installed on the roller 209.

[0044] Furthermore, such as Figure 9-11As shown, the support frame has a symmetrical structure, including a vertical support beam 201, a bottom support beam 202, a 45-degree reinforcing beam 203, a lower crossbeam 204, a middle crossbeam 205, right-angle brackets 207, and 135-degree brackets 208. It adopts an aluminum alloy frame structure. The two lower crossbeams 204 are placed parallel to each other, and both ends are fixed to one side of the bottom of the vertical support beam 201 via right-angle brackets 207. The bottom support beam 202 is fixed to the other sides of the bottom of the vertical support beams 201 at both ends via right-angle brackets 207 (as shown in the figure, opposite to where the lower crossbeam 204 is installed). On the side, there are two bottom support beams 202, and one on each side, for a total of eight bottom support beams 202. The two ends of the 45-degree reinforcing beam 203 of the support frame are connected to all the bottom support beams 202 and the vertical beams 201 of the support frame through 135-degree angle fittings 208. The middle crossbeam 205 of the support frame is parallel to the lower crossbeam 204 of the support frame. The two middle crossbeams 205 of the support frame are connected to the middle of the vertical beams 201 of the left and right sides of the support frame through right-angle angle fittings 207 of the support frame. The profile bearing 206 is fixed to the upper end of the vertical beam 201 of the support frame. The two ends of the roller 209 are fixed in the profile bearing 206 on the left and right sides by two roller limiting rings 210. Furthermore, the vertical support beam 201 is made of 80mm×40mm rectangular aluminum alloy profile. The 80mm long side connects the two bottom support beams 202 and the two 45-degree support frame reinforcing beams 203, and the two 40mm long sides respectively connect one bottom support beam 202 and one 45-degree support frame reinforcing beam 203.

[0045] Furthermore, such as Figure 12-14 As shown, the lever assembly 3 includes a lever shaft 301, a lever limiting ring 302, a double-hole shaft support 303, a cross shaft support 304, and a slider hinge assembly 310. The two lever shafts 301 are arranged in parallel, and their relative positions are fixed by the double-hole shaft supports 303 at both ends. The lever limiting ring 302 is fixed at both ends of the lever shaft 301, and both ends of the lever shaft 301 cooperate with the slider hinge assembly 310. The slider hinge assembly 310 at both ends slides along the axial direction of the lever shaft 301 within the range between the lever limiting ring 302 and the double-hole shaft support 303. The lever shaft 301 is fixed on the roller 209 by two cross shaft supports 304. By employing a double-hole shaft support, on the one hand, it is used together with the lever limiting ring 302 to limit the slider hinge assembly 310; on the other hand, it allows the two lever shafts 301 to move together, preventing the float assembly from tilting; the cross shaft support 304 fixes the lever assembly 3 to the roller 2, which serves as the fulcrum, and the ratio of lever force transmission can be adjusted by adjusting the distance from the cross shaft support 304 to both ends of the lever shaft 301.

[0046] Furthermore, such as Figure 13As shown, the slider hinge assembly 310 includes a box-type unit slider 311, a slider connector 312, a hinge 313, and a threaded shaft 314. Two sliders 311 are fixed parallel to each other on the upper end of the slider connector 312, with a gap between them. The fixed end of the hinge 313 is connected to the lower end of the slider connector 312, and the rotation axis of the hinge 313 is perpendicular to the central axis of the two sliders 311. The threaded shaft 314 is connected to the movable end of the hinge 313. By setting the slider hinge assembly 310 at both ends of the lever, displacement of the lead screw connecting shaft and the float shaft in the horizontal direction with the movement of the lever can be avoided, thus better achieving the function of power transmission.

[0047] Furthermore, such as Figure 15 As shown, the buoy assembly 4 includes a main buoy 401, a secondary buoy 402, a gasket 403, a buoy shaft 404, a counterweight 405, a buoy shaft limiting ring 406, and a buoy rigid coupling 407. The inner hole of the main buoy 401 is coaxially fitted with the buoy shaft 404, and the upper and lower ends of the main buoy 401 are connected to the gasket 403 and fixed by the first set of buoy shaft limiting rings 406. The inner hole of the secondary buoy 402 is coaxially fitted with the buoy shaft 404 below the main buoy 401, and the upper and lower ends of the secondary buoy 401 are connected to the gasket 403 and fixed by the first set of buoy shaft limiting rings 407. Two sets of buoy shaft limiting rings 406 are fixed; the counterweight 405 is fixedly connected to the lower end of the buoy shaft 404 by the buoy shaft limiting rings 406; the buoy rigid coupling 407 is concentrically fitted with the buoy shaft 404 and fixed at the upper end of the buoy shaft 404; the buoy shaft 404 is fixed to the slider hinge assembly 310 in the lever assembly 3 through the buoy rigid coupling 407 (the buoy shaft 404 is concentrically fitted with the threaded shaft 314 of the slider hinge assembly 310 through the buoy rigid coupling 407, fixing the buoy assembly 4 to the slider hinge assembly 310). By setting a secondary buoy below the main buoy, the problem of insufficient buoyancy when using only one type of buoy can be solved, and the overall structure can be made more compact. Under the same size conditions, compared with using only one type of buoy, the buoy will have greater upward force when the buoy assembly is at the crest of a wave; under the same buoyancy conditions, compared with using only one type of buoy, setting two types of buoys can make the buoy assembly smaller and the overall structure more compact.

[0048] Furthermore, the mass of the buoy assembly after counterweighting meets the following requirements:

[0049]

[0050] In the formula, m f The mass of the buoy assembly after counterweighting is given, with a magnification ratio of u > 1, where g represents the unit of gravity, and F... f This indicates the input force of buoy assembly 4;

[0051] Establish the relationship between the buoyancy of the main buoy and the auxiliary buoy in the buoy assembly:

[0052]

[0053] In the formula, F m The buoyancy of the main buoy 401, F a This refers to the buoyancy of auxiliary buoy 402.

[0054] Furthermore, the following optional parameter calculation methods are provided:

[0055] The parameters of the lever-type mechanical rectifier wave energy capture device are as follows:

[0056] (1) Buoyancy and gravity of buoy assembly 4

[0057] Based on the requirements of the entire system, the input force required for the drive power extraction device 1 is initially determined to be F. p =80N. The length ratio of the lever shaft on the power extraction device side to the lever shaft on the buoy assembly side is 1:2. According to the lever principle, the input force of the buoy assembly is:

[0058]

[0059] When the buoy assembly is in the trough of a wave, in order to ensure that the buoy assembly can drive the power extraction device, the weight of the buoy assembly needs to be greater than the input force of the buoy assembly. Taking the amplification ratio as 5:4, the mass of the buoy assembly after counterweighting is:

[0060]

[0061] In the formula m f To determine the mass of the buoy assembly after ballast, F p Substituting 80N into the equation, we get: m f = 5.102 kg. (Rounded to m) f = 5kg. Based on the mass m of the buoy assembly. f Select a counterweight to balance the weight of the buoy assembly.

[0062] When the buoy assembly is at the crest of a wave, to ensure it can drive the power extraction device, the buoyancy of the buoy assembly must be greater than its input force, with an amplification ratio of 5:4. To ensure the main buoy can rise and fall with the waves, the waterline should reach the centerline of the buoy when the main buoy is stationary, and the water level should be at half the height of the main buoy when it is stationary. That is, the buoyancy of the buoy assembly after counterweighting is:

[0063]

[0064] In the formula F m The buoyancy of the main buoy, F a This represents the buoyancy of the secondary buoy. To ensure the main buoy can dynamically follow the wave movements, we take F as the buoyancy. m =100N, F a=50N.

[0065] (2) Determination of parameters for power extraction device 1

[0066] The ball screw drives the gears to rotate, providing a certain torque for the generator's starting and operation. The relationship between the generator torque and the screw input force is as follows:

[0067]

[0068] In the formula, p is the lead of the leadscrew, and η is the lead of the leadscrew. p The mechanical efficiency of the power extraction device.

[0069] Due to its compact structure, η is taken. p =0.9, take p=10mm, substitute F p =80N

[0070]

[0071] A generator with a starting torque of 57 N / mm was selected.

[0072] To ensure stable power transmission, the gear in the motor position and the two lead screw positions are each taken as two pairs of transmission ratios of 1, module m = 2, and number of teeth z = 30.

[0073] In summary, the dimensional parameters of the buoy assembly designed in this invention are shown in Table 1.

[0074] Table 1 Buoy Component Dimensions

[0075] Parameter name symbol numerical values unit Buoy component quality <![CDATA[m f ]]> 5 kg Main buoy buoyancy <![CDATA[F m ]]> 100 N Auxiliary buoy buoyancy <![CDATA[F a ]]> 50 N

[0076] The specific parameters of the power extraction device 1 are shown in Table 2.

[0077] Table 2 Dimensional parameters of the power extraction device

[0078]

[0079]

[0080] In this invention, the device has three different diameter optical axes: 12mm, 16mm, and 20mm. To ensure structural flexibility, the buoy shaft 404 and threaded shaft 314 are selected as optical axes with a diameter of 12mm. To ensure stable power transmission of the power extraction device, the lead screw connecting shaft needs to be larger, so the lead screw connecting shaft 129 and the connecting shaft extension shaft 107 are selected as optical axes with a diameter of 16mm. To ensure the strength of the lever assembly structure, the lever shaft 301 and roller 209 are selected as optical axes with a diameter of 20mm.

[0081] The working principle of this invention is:

[0082] The lever assembly 3 is mounted on the roller 209 of the lever support frame 2 via a cross shaft support 304. The buoy assembly 4 and the power extraction device 1 are connected to both ends of the lever assembly 3 via a slider hinge assembly 310. The lever shaft 301, with the roller 209 as the fulcrum, proportionally transmits the linear motion of the buoy assembly 4 in the direction perpendicular to the sea level to the power extraction device. The lead screw assembly 120 in the power extraction device 1 consists of a pair of ball screw assemblies with opposite rotation directions. The ball screw assemblies rectify the input reciprocating linear motion into unidirectional rotational motion through a one-way clutch, and then the rotational motion of the two lead screws is transmitted to the motor shaft of the generator 118 by the gear assembly 110, so as to realize the rotational power generation of the generator 118.

[0083] During operation, the buoy assembly 4 reciprocates vertically in a straight line with the waves in a direction perpendicular to the sea level. The main buoy 401 floats on the sea surface. When the crest of a wave passes over the buoy assembly 4, the water level at the buoy shaft 404 rises, generating buoyancy in the main buoy 401. The buoy assembly 4 transmits an upward force perpendicular to the sea level to the lever shaft 301 through the slider hinge assembly 310. When the trough of a wave passes over the buoy assembly 4, the water level at the buoy shaft 404 drops, generating a downward force perpendicular to the sea level due to the weight of the counterweight 405 and the buoy assembly 4 itself. The buoy assembly 4 transmits this force to the lever shaft 301 through the slider hinge assembly 310. The lever shaft 301 uses the roller 209 as a fulcrum and transmits the wave force to the power extraction device 1 according to the lever principle. At this time, the roller 209 and the profile bearing 206 act as hinge supports. The power transmission ratio can be changed by adjusting the length of the lever shaft 301 on both sides of the fulcrum to better capture wave energy in different working environments. For example, when the wave force is small and insufficient to drive the power extraction device 1, the length of the lever shaft 301 on the buoy side can be increased to amplify the input force and drive the generator 118 to generate electricity; when the wave force is large enough, the length of the lever shaft 301 on the power extraction device side can be increased to amplify the input linear velocity and increase the power generation of the generator 118.

[0084] The left-hand ball nut 124 and the right-hand ball nut 126 simultaneously reciprocate linearly along the lead screw connecting shaft 129. At this time, in the same linear motion direction, the left-hand ball screw 123 and the right-hand ball screw 125 rotate in opposite directions under the drive of the ball nuts. One-way clutches 116 are fixed to the output shafts of both ball screws. The one-way clutches 116 engage the ball screw with the lead screw gear 115 only when the rotation direction of the ball screw corresponds to the forward rotation direction of the generator 118. When the rotation direction of the ball screw does not correspond to the forward rotation direction of the generator 118, the clutches decouple the ball screw from the gears, and the lead screw shaft rotates freely without transmitting power. The lead screw gear in the clutch-engaged state transmits the rotational power of the ball screw to the motor shaft; since both lead screw gears 115 are engaged with the motor gear 114, the lead screw gear in the clutch-disengaged state also rotates in the direction corresponding to the rotation direction of the generator. Therefore, the ball screw and clutch play a role in mechanical rectification. Regardless of the direction of the input power on the screw connecting shaft 129, the screw gear 115 drives the generator 118 to generate electricity in the direction that makes the generator 118 rotate in the forward direction.

[0085] It should be noted that the motor-mounted gear 114 and the lead screw-mounted gear 115 are spur gears with bosses made of 45 carbon steel. When the gear assembly 110 rotates with the rotation of the lead screw output shaft, since the motor-mounted gear 114 and the lead screw-mounted gear 115 have a certain mass, the three gears act as inertia containers on the three rotating shafts respectively. When the gears rotate, they store a portion of inertial force to assist the gears in maintaining continuous rotation on the three rotating shafts. When the direction of motion of the lead screw connecting shaft 129 changes with the position of the sea waves, the buoy assembly 4 will experience a dead zone due to the viscous damping force of the seawater and the mechanical damping of the power extraction device 1, and will be unable to drive the gear assembly 110 to rotate. At this time, the inertial force stored in the inertia container is passively released, driving the gear assembly 110 to rotate continuously. The auxiliary buoy 402 compensates for the weight of the counterweight 405 when the buoy assembly rises, so as to ensure that the main buoy 401 moves with the rise and fall of the sea waves.

[0086] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A lever-type mechanical rectifying sea wave energy capturing device, characterized in that, include: The device comprises a power extraction device (1), a lever support frame (2), a lever assembly (3), and a buoy assembly (4). One end of the lever assembly (3) is connected to the buoy assembly (4), and the other end of the lever assembly (3) is connected to the power extraction device (1). The lever assembly (3) uses the roller (209) of the lever support frame (2) as a fulcrum to transmit the motion of the buoy assembly (4) in a direction perpendicular to the sea level to the power extraction device (1). The power extraction device (1) rectifies the reciprocating linear motion into unidirectional rotational motion, thereby realizing the rotational power generation of the generator (118) in the power extraction device (1). The buoy assembly (4) includes a main buoy (401), a secondary buoy (402), a buoy shaft (404), a counterweight (405), a buoy shaft retaining ring (406), and a buoy rigid coupling (407); the inner hole of the main buoy (401) is coaxially fitted with the buoy shaft (404), and the upper and lower ends of the main buoy (401) are fixed by the first set of buoy shaft retaining rings (406); the inner hole of the secondary buoy (402) is coaxially fitted with the buoy shaft (404) and the main buoy (405). 1) Below, the upper and lower ends of the auxiliary buoy (402) are fixed by the second set of buoy shaft limiting rings (406); the counterweight (405) is fixedly connected to the lower end of the buoy shaft (404) by the third set of buoy shaft limiting rings (406); the buoy rigid coupling (407) is concentrically fitted with the buoy shaft (404) and fixed at the upper end of the buoy shaft (404); the buoy shaft (404) is fixed to the slider hinge assembly (310) in the lever assembly (3) through the buoy rigid coupling (407).

2. The lever-type mechanical rectifier sea wave energy capturing device according to claim 1, characterized in that, The power extraction device (1) includes a gear assembly (110), a lead screw assembly (120), a linear bearing (105), and a connecting shaft extension shaft (107). One end of the lead screw connecting shaft (129) in the lead screw assembly (120) passes through the linear bearing (105) and is connected to one end of the lever assembly (3) via the connecting shaft extension shaft (107). The output shafts of the left-hand ball screw (123) and the right-hand ball screw (125) in the lead screw assembly (120) are concentrically fixed with the corresponding one-way clutch (116) in the gear assembly (110). Through the cooperation of the gear assembly (110) and the lead screw assembly (120), the reciprocating linear motion is rectified into one-way rotational motion, thereby realizing the rotational power generation of the generator (118) in the gear assembly (110).

3. The lever-type mechanical rectifier sea wave energy capturing device according to claim 2, characterized in that, The gear assembly (110) includes a first bearing housing (111), a motor-position gear support shaft (112), a lead screw-position gear support shaft (113), a motor-position gear (114), a lead screw-position gear (115), a one-way clutch (116), and a generator (118); wherein, one motor-position gear support shaft (112) and two lead screw-position gear support shafts (113) are respectively connected to a first bearing housing (111); one motor-position gear (114) and two lead screw-position gear support shafts (115) are connected to a first bearing housing (111); The lead screw gears (115) are fixed on the upper end of the table of the motor gear support shaft (112) and the lead screw gear support shaft (113), respectively. The two lead screw gears (115) mesh with the motor gear (114) respectively, and there is a gap between the two lead screw gears (115). The one-way clutch (116) is fixed inside the gear hole of the two lead screw gears (115), and the rotating shaft of the generator (118) is concentrically fixed with the gear hole of the motor gear (114).

4. The lever-type mechanical rectifier sea wave energy capturing device according to claim 2, characterized in that, The lead screw assembly (120) includes a second bearing housing (121), a third bearing housing (122), a left-hand ball screw (123), a left-hand ball nut (124), a right-hand ball screw (125), a right-hand ball nut (126), an upper fastening plate (127) for the nut, a lower fastening plate (128) for the nut, a lead screw connecting shaft (129), and a connecting shaft limiting ring (130). The left-hand ball screw (123) and the right-hand ball screw (125) are parallel to each other. The positioning shafts at both ends of the left-hand ball screw (123) and the right-hand ball screw (125) are concentrically fixed to the bearings of the second bearing housing (121) and the third bearing housing (122) on both sides, respectively. The output of the left-hand ball screw (123) and the right-hand ball screw (125) is... The output end is concentrically fixed with the corresponding one-way clutch (116) in the gear assembly (110); the left-hand ball nut (124) is installed on the threaded shaft of the left-hand ball screw (123), and the right-hand ball nut (126) is installed on the threaded shaft of the right-hand ball screw (125); the upper end fastening plate (127) and the lower end fastening plate (128) of the nut are fixed on the upper end face and the lower end face of the left-hand ball nut (124) and the right-hand ball nut (126); the screw connecting shaft (129) passes through the upper end fastening plate (127) and the lower end fastening plate (128) of the nut and is fixed by the connecting shaft limiting ring (130), and the screw connecting shaft (129) is concentrically engaged with the middle hole of the upper end fastening plate (127) and the lower end fastening plate (128) of the nut.

5. The lever-type mechanical rectifier sea wave energy capturing device according to claim 1, characterized in that, The lever support frame (2) includes a support frame body, a profile bearing (206), a roller (209), and a roller limiting ring (210); wherein, the two ends of the roller (209) are fixed in the profile bearing (206) on both sides of the upper end of the support frame body by the roller limiting ring (210), and the lever assembly (3) is installed on the roller (209).

6. The lever-type mechanical rectifier sea wave energy capturing device according to claim 1, characterized in that, The lever assembly (3) includes a lever shaft (301), a lever limiting ring (302), a double-hole shaft support (303), a cross shaft support (304), and a slider hinge assembly (310). The two lever shafts (301) are arranged in parallel, and the two lever shafts (301) are fixed in relative position by the double-hole shaft supports (303) at both ends. The lever limiting ring (302) is fixed at both ends of the lever shaft (301), and both ends of the lever shaft (301) cooperate with the slider hinge assembly (310). The slider hinge assembly (310) at both ends slides along the axial direction of the lever shaft (301) within the range between the lever limiting ring (302) and the double-hole shaft support (303). The lever shaft (301) is fixed on the roller (209) by two cross shaft supports (304).

7. The lever-type mechanical rectifier sea wave energy capturing device according to claim 6, characterized in that, The slider hinge assembly (310) includes a box-type unit slider (311), a slider connector (312), a hinge (313), and a threaded shaft (314); two sliders (311) are fixed parallel to each other on the upper end of the slider connector (312) and there is a gap between the two sliders (311); the fixed end of the hinge (313) is connected to the lower end of the slider connector (312), and the rotation axis of the hinge (313) is perpendicular to the central axis of the two sliders (311); the threaded shaft (314) is connected to the movable end of the hinge (313).

8. The lever-type mechanical rectifier wave energy capture device according to claim 1, characterized in that, The mass of the buoy assembly after counterweighting meets the following requirements: wherein M is the mass of the counterweight backfloat assembly, u > 1 is the scale factor, g is the unit of gravity, and F f F denotes the input force of the float assembly (4); Establish the relationship between the buoyancy of the main buoy and the auxiliary buoy in the buoy assembly: wherein is the buoyancy of the main buoy, is the buoyancy of the secondary buoy.

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