An array-type wave energy piezoelectric-electromagnetic composite power generation device

Abstract

The present invention relates to an array-type wave-energy piezoelectric-electromagnetic composite power generation device, which is composed of a number of connected power generation units; the power generation unit includes a power generation module, a floating plate, a hinge support, a core shaft, and a rope; the core shaft is respectively arranged in the four side areas of the upper surface of the floating plate and is respectively parallel to the four sides of the floating plate; the two ends of the core shaft are respectively connected to the floating plate via a hinge support; the corresponding sides of two adjacent floating plates are connected by a rope; the power generation module is arranged between the upper side of two adjacent floating plates, and the two ends of its bottom are respectively hinged to the core shaft on the adjacent sides of the two floating plates. The present invention uses ocean waves to drive the relative motion of the floating plates, and transmits it to the drive rod, which is accelerated by a speed increaser, driving the magnetic excitation structure to excite the piezoelectric-electromagnetic composite power generation beam. The device of the present invention can be arrayed, can collect energy in multiple directions, and is efficient and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater power generation, and in particular to an array-type ocean wave energy piezoelectric-electromagnetic composite power generation device. Background Art

[0002] Humanity is constantly researching technologies for generating electricity using ocean energy, which mainly manifests itself in two directions: one is to build offshore power stations by designing super-large generator sets, using hydraulics, pneumatics and gear sets to transmit power, and coordinating multiple units to achieve high-power power generation; the other is to design miniaturized generator sets to directly power low-power equipment on the water.

[0003] Designing an oversized generator set inevitably results in an excessively large overall size, making it vulnerable to storms at sea and requiring a certain level of wind and waves to operate properly. Oversized generator sets are also costly and complex to install and operate. If any part of the system fails, it will not function properly. Designing a miniaturized generator set, on the other hand, does not require high-intensity winds and waves to operate properly and is less expensive. However, these generator sets have lower output power and are generally used as auxiliary power sources for low-power appliances. They are not as effective as expected for high-power appliances. Summary of the Invention

[0004] The purpose of the present invention is to provide an array-type wave energy piezoelectric-electromagnetic composite power generation device, which mainly addresses the problem of difficulty in increasing the power generation capacity of miniaturized generator sets.

[0005] The technical solution adopted in the present invention is as follows:

[0006] The present invention proposes an array-type wave energy piezoelectric-electromagnetic composite power generation device, which is composed of power generation units connected together; the power generation unit includes a power generation module, a floating plate, a hinge support, a core shaft and a rope; the core shafts are respectively arranged in the four side areas on the upper surface of the floating plate and are respectively parallel to the four sides of the floating plate; the two ends of the core shaft are respectively connected to the floating plate through hinge supports; the corresponding sides of two adjacent floating plates are connected by ropes; the power generation module is arranged between the upper side of two adjacent floating plates, and its bottom ends are respectively hinged to the core shafts on the adjacent sides of the floating plates on both sides.

[0007] Furthermore, the power generation module includes a front shell, a rear shell, a main shaft, a support rod, a driving gear, a double gear, a clamping block, a driving rod, a piezoelectric-electromagnetic composite power generation beam and a magnetic excitation structure; the lower two sides of the front shell are respectively provided with square holes and slots, the inner center is provided with a blind hole, and one side of the inner part is provided with a protruding stepped shaft; the lower one side of the rear shell is provided with a square hole corresponding to the position of the hole above the front shell, the inner center is provided with a blind hole, and the inner side surfaces are evenly distributed with circumferential vertical plates corresponding to the magnetic excitation structures; the rear shell and the front shell are respectively provided with square holes and slots, the inner center is provided with a blind hole, and the inner side surfaces are evenly distributed with circumferential vertical plates corresponding to the magnetic excitation structures. The shell is fixedly connected accordingly; the upper and lower ends of the driving rod and the support rod are provided with connecting holes, and the upper end of the driving rod is fitted with a gap in the middle of the main shaft after passing through the notch of the front shell; there are two support rods, which are respectively inserted into the corresponding square holes on the front shell and the rear shell, and the upper ends of the front and rear support rods are fitted with gaps on the front and rear sides of the main shaft after passing through the shell, so that the support rod and the shell rotate synchronously, and the driving rod and the shell rotate relative to each other; a shaft sleeve is provided on the main shaft between the upper end of the driving rod and the upper end of the support rod located on the front shell; the main The front and rear ends of the shaft are respectively interference fit with the blind holes in the center of the front shell and the rear shell; the driving gear is arranged on the rear side of the upper end of the driving rod and is clearance-matched with the main shaft, and is fixedly connected to the upper end of the driving rod by a mortise and tenon structure, so that the driving gear and the driving rod keep rotating synchronously; the double gear is clearance-matched with the stepped shaft extending from the inside of the front shell; the double gear is composed of a multi-tooth gear and a small-tooth gear connected coaxially, and the multi-tooth gear is located at the rear end of the stepped shaft, and the small-tooth gear is located at the front side of the multi-tooth gear; there is a sleeve between the double gear and the stepped shaft Axial bushing; a retaining spring is provided between the rear end of the stepped shaft and the multi-tooth gear; the small-tooth gear is meshed with the driving gear; the magnetic excitation structure is clearance-matched with the side of the main shaft close to the rear shell, and meshes with the multi-tooth gear; a bushing is provided on the main shaft between the magnetic excitation structure and the upper end of the support rod located on the rear shell; the piezoelectric-electromagnetic composite power generation beams are respectively and evenly distributed circumferentially between the rear shell and the magnetic excitation structure; the head end of the piezoelectric-electromagnetic composite power generation beam is pressed against the corresponding circumferential vertical plate inside the rear shell by a clamping block.

[0008] Furthermore, the driving rod includes an upper driving rod component, a flexible hinge and a lower driving rod component; the upper end of the upper driving rod component is provided with a connecting hole and is clearance-matched with the main shaft; the upper driving rod component and the lower driving rod component are rigid bodies, and the flexible hinge is a flexible body; the flexible hinge is connected between the bottom end of the upper driving rod component and the upper end of the lower driving rod component, and forms a snap-fit ​​structure, so that limited torsion is allowed between the upper driving rod component and the lower driving rod component while ensuring the effective transmission of the force of the floating plate; the outer side of the bottom of the upper driving rod component is designed with a concave waterproof structure covering the side notch of the front shell; cylindrical protrusions are provided on both sides of the upper and lower connecting hole of the upper end of the upper driving rod component, so that the driving rod and the driving gear maintain synchronous rotation through the mortise and tenon principle; the lower end of the lower driving rod component is provided with a connecting hole with a hole diameter larger than the diameter of the spindle.

[0009] Furthermore, the piezoelectric-electromagnetic composite power generation beam includes a vibration beam, a piezoelectric sheet, a coil and a first magnetic block; the piezoelectric sheet is respectively bonded to the upper surface and the lower surface of the vibration beam; the coil is bonded to the end of the vibration beam; the first magnetic block is bonded between the end of the vibration beam and the coil; the same pole of the first magnetic block faces outward; the head end of the vibration beam is pressed against the corresponding circumferential vertical plate by a clamping block, and the clamping block and the two sides of the corresponding circumferential vertical plate are fixedly connected by bolts.

[0010] Furthermore, the magnetic excitation structure includes a magnetic block carrier and a second magnetic block; the material of the magnetic block carrier is special engineering plastic, and it is composed of a gear and a cylinder coaxially connected to the rear side of the gear, and the outer circumferential surface of the cylinder is circumferentially evenly distributed with square holes corresponding to the number of magnetic excitation structures; the second magnetic blocks are respectively arranged in the square holes of the cylinder and interference fit with the square holes, and the same pole of the second magnetic blocks faces outward; the second magnetic blocks correspond one-to-one with the first magnetic blocks and repel each other.

[0011] Furthermore, the materials of the driving gear and the duplex gear are both special engineering plastics.

[0012] Furthermore, the floating plate is composed of a regular quadrangular pyramid and a regular quadrangular prism respectively fixed to the upper and lower surfaces of the regular quadrangular pyramid; wherein, the four sides of the regular quadrangular prism located at the upper part are each provided with a pair of flanges, and the flanges are provided with circular holes as binding holes for ropes.

[0013] Furthermore, the length of the rope is adjusted according to the maximum floating plate distance, and the rope has an inextensible characteristic.

[0014] Furthermore, the shape of the square holes on the front shell and the rear shell is the same as the cross-sectional size of the support rod, so that the support rod can rotate synchronously with the front shell and the rear shell; the width of the slot on the front shell is equal to the width of the drive rod.

[0015] Furthermore, a supporting structure and reinforcing ribs are provided in the middle of the support rod; connecting holes are provided at the upper and lower ends of the support rod, and circular columns of a certain length are extended from the connecting holes at the lower end to the front and rear sides respectively; the two support rods are respectively hinged to the core shaft on the same side of the floating plate, and the driving rod is hinged to the core shaft on the corresponding side of the adjacent floating plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts a hybrid power generation method of piezoelectricity and electromagnetics to improve the power generation performance of the device.

[0018] 2. The device of the present invention is small in size and easy to install. It can be formed into an arrayed power generation cluster of any size. After arraying, it can collect energy from medium and low intensity waves from any direction, greatly improving the power generation performance of the device. Moreover, failure of a certain part will not affect the overall power generation performance of the system.

[0019] 3. The power generation module of the device of the present invention contains a speed increaser gear set, which effectively converts the low-frequency excitation of the wave into a higher-frequency excitation.

[0020] 4. The connection hole of the lower part of the driving rod of the device of the present invention is larger than the diameter of the core shaft, and a flexible hinge is connected in the middle of the driving rod, which reduces the damage to the power generation module caused by the harmful torsional movement of the floating plate. At the same time, the rigid driving rod parts at both ends and the flexible hinge in the middle form a variable stiffness effect, which can normally transmit the effective movement of the floating plate.

[0021] 5. The device of the present invention has low cost, simple structure and can be mass-produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the power generation unit of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the power generation module after removing the outer shell;

[0024] Figure 3 is a schematic diagram of the rear housing;

[0025] Figure 4 This is an exploded view of the power generation module;

[0026] Figure 5 It is a structural diagram of the main shaft;

[0027] Figure 6 It is a structural diagram of the support rod;

[0028] Figure 7 It is a structural diagram of the driving gear;

[0029] Figure 8 It is a structural diagram of a double gear;

[0030] Figure 9 It is a structural diagram of the clamping block;

[0031] Figure 10 It is a structural diagram of the driving rod;

[0032] Figure 11 is a cross-sectional view of the driving rod;

[0033] Figure 12 It is a structural diagram of a flexible hinge;

[0034] Figure 13 It is a structural schematic diagram of the piezoelectric-electromagnetic composite power generation beam;

[0035] Figure 14 is a schematic diagram of the magnetic excitation structure. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0038] See attached Figures 1 to 14 The detailed structure of an embodiment of an array-type wave-powered piezoelectric-electromagnetic hybrid power generation device proposed in this invention is presented. In this embodiment, the device comprises four sequentially connected power generation units, each comprising a power generation module 1, a floating plate 2, a hinged support 3, a spindle 4, and a rope 5.

[0039] like Figure 1 As shown, the floating plate 2 is composed of a regular quadrangular pyramid and a regular quadrangular prism respectively fixed on the upper surface and lower surface of the regular quadrangular prism; wherein, the four sides of the regular quadrangular prism located at the upper part are provided with a pair of flanges, and the flanges are provided with circular holes as binding holes for ropes 5; the core shafts 4 are respectively arranged on the four side areas of the upper surface of the regular quadrangular prism on the upper part of the floating plate 2 and are respectively parallel to the four sides of the floating plate; the two ends of the core shaft 4 are respectively connected to the floating plate 2 through hinge supports 3; the circular holes on the flanges on the corresponding side of the floating plates 2 in two adjacent power generation units are bound and connected by ropes 5; the power generation module 1 is arranged between the upper parts of two adjacent floating plates 2, and the two ends of its bottom are respectively hinged to the core shafts 4 on the adjacent sides of the floating plates 2 on both sides; the length of the rope 5 is adjusted according to the maximum spacing between the floating plates 2, and the rope 5 has the characteristic of being inextensible; in this way, a unit power generation array that can collect multi-directional wave energy can be formed.

[0040] Among them, Figure 2-4As shown, the power generation module 1 includes a front shell 101, a rear shell 102, a main shaft 103, a support rod 106, a driving gear 107, a double gear 108, a clamping block 109, a driving rod 11, a piezoelectric-electromagnetic composite power generation beam 12 and a magnetic excitation structure 13; the power generation module 1 is the main body of the power generation structure; the front shell 101 and the rear shell 102 are both cylindrical shells, and the edges of the corresponding ends of the front shell 101 and the rear shell 102 are fixed into a whole through connecting flanges and bolts.

[0041] The side walls on both sides of the lower part of the front shell 101 are respectively provided with square holes and slots, a blind hole is provided in the inner center, and a protruding stepped shaft is provided on one side of the inner part; the side wall on one side of the lower part of the rear shell 102 is provided with a square hole corresponding to the position of the hole on the upper part of the front shell 101, a blind hole is provided in the inner center, and circumferential vertical plates corresponding to the magnetic excitation structure 13 are evenly distributed on the inner side.

[0042] The rear housing 102 is fixedly connected to the front housing 101; the upper and lower ends of the driving rod 11 and the support rod 106 are provided with connecting holes, and the upper end of the driving rod 11 passes through the notch of the front housing 101 and fits into the middle gap of the main shaft 103.

[0043] like Figure 2 and 4 As shown, two support rods 106 are provided, which are respectively inserted into the corresponding square holes on the front shell 101 and the rear shell 102, and the upper ends of the front and rear support rods 106 pass through the shell and respectively fit with the front and rear sides of the main shaft 103, so that the support rods 106 rotate synchronously with the front shell 101 and the rear shell 102, and the drive rod 11 rotates relative to the front shell 101 and the rear shell 102.

[0044] like Figure 4 As shown, a shaft sleeve 104 is provided on the main shaft 103 between the upper end of the driving rod 11 and the upper end of the support rod 106 located on the front shell 101, which limits the position of the driving rod 11 and ensures that the driving rod 11 and the driving gear 107 always rotate synchronously; the front and rear ends of the main shaft 103 are respectively interference fit with the blind holes in the center of the front shell 101 and the rear shell 102.

[0045] like Figure 4As shown, the driving gear 107 is arranged at the rear side of the upper end of the driving rod 11 and is in clearance fit with the main shaft 103, and is fixedly connected to the upper end of the driving rod 11 by a mortise and tenon structure, so that the driving gear 107 and the driving rod 11 keep rotating synchronously; the double gear 108 is in clearance fit with the stepped shaft extending from the inside of the front housing 101; the double gear 108 is composed of a multi-tooth gear and a small-tooth gear connected coaxially, and the multi-tooth gear is located at the rear end of the stepped shaft, and the small-tooth gear is located at the front side of the multi-tooth gear; an axial sleeve 104 is provided between the double gear 108 and the stepped shaft to limit the position of the double gear 108 and prevent the double gear 108 from being rotated. 08 axial movement; a retaining spring 105 is provided between the rear end of the stepped shaft and the multi-tooth gear to prevent the duplex gear 108 from escaping from the stepped shaft; the small-tooth gear is meshed with the drive gear 107; the magnetic excitation structure 13 is clearance-matched with the side of the main shaft 103 close to the rear shell 102, and is meshed with the multi-tooth gear; a shaft sleeve 104 is provided on the main shaft 103 between the magnetic excitation structure 13 and the upper end of the support rod 106 located on the rear shell 102 to prevent the magnetic excitation structure 13 from axial movement; the drive gear 107, the duplex gear 108 and the magnetic excitation structure 13 form a two-stage speed increaser structure, which increases the excitation frequency.

[0046] like Figure 2 As shown, the piezoelectric-electromagnetic composite power generation beams 12 are evenly distributed circumferentially between the rear shell 102 and the magnetic excitation structure 13; the head end of the piezoelectric-electromagnetic composite power generation beam 12 is pressed against the corresponding circumferential vertical plate inside the rear shell 102 by the clamp 109.

[0047] The shape of the square holes on the front shell 101 and the rear shell 102 is the same as the cross-sectional size of the support rod 106, so that the support rod 106 can rotate synchronously with the front shell 101 and the rear shell 102; the width of the slot on the front shell 101 is equal to the width of the drive rod 11, and the slot is provided with a notch for the mortise and tenon structure on the drive rod 11 to pass through, and the angle of the slot with respect to the main axis 103 can be adjusted accordingly according to the maximum and minimum angles of the protruding rod of the power generation module 1.

[0048] The materials of the driving gear 107 and the double gear 108 are both special engineering plastics, which reduces the inertia moment generated when the gears rotate.

[0049] A supporting structure and reinforcing ribs are provided in the middle of the support rod 106; connection holes are provided at the upper and lower ends of the support rod 106, and circular columns of a certain length extend from the lower connection hole to the front and rear sides respectively; the two support rods 106 are respectively hinged to the core shaft 4 on the same side of the floating plate 2, and the driving rod 11 is hinged to the core shaft 4 on the corresponding side of the adjacent floating plate.

[0050] like Figure 10As shown, the driving rod 11 includes an upper driving rod component 111, a flexible hinge 112 and a lower driving rod component 113; the upper end of the driving rod upper component 111 is provided with a connecting hole and is clearance-matched with the main shaft 103; the driving rod upper component 111 and the driving rod lower component 113 are rigid bodies, while the flexible hinge 112 is a flexible body; the flexible hinge 112 is connected between the bottom end of the driving rod upper component 111 and the upper end of the driving rod lower component 113, and forms a snap-fit ​​structure, so that the driving rod upper component 111 and the driving rod lower component 113 are connected. While allowing limited torsion between them, it ensures that the force of the floating plate 2 is effectively transmitted; the outer side of the bottom of the driving rod upper component 111 is designed with a concave waterproof structure covering the side notch of the front shell 101; cylindrical protrusions are provided on the upper and lower sides of the connecting hole at the upper end of the driving rod upper component 111, so that the driving rod 11 and the driving gear 107 maintain synchronous rotation through the mortise and tenon principle; the lower end of the driving rod lower component 113 is provided with a connecting hole with a hole diameter larger than the diameter of the spindle, so that limited torsional movement is allowed between the driving rod lower component 113 and the floating plate 2.

[0051] like Figure 13 As shown, the piezoelectric-electromagnetic composite power generation beam 12 includes a vibration beam 121, a piezoelectric sheet 122, a coil 123, and a first magnetic block 124. The piezoelectric sheet 122 is bonded to the upper and lower surfaces of the vibration beam 121, respectively. The optimal power generation effect is achieved by adjusting the length, width, and thickness of the vibration beam 121 and the piezoelectric sheet 122, as well as the bonding position of the piezoelectric sheet 122. The coil 123 is bonded to the end of the vibration beam 121. The first magnetic block 124 is bonded between the end of the vibration beam 121 and the coil 123. The same pole of the first magnetic block 124 faces outward. The head end of the vibration beam 121 is pressed against the corresponding circumferential vertical plate by a clamping block 109. The clamping block 109 is fixed to the two sides of the corresponding circumferential vertical plate by bolts. The optimal power generation effect is achieved by adjusting the number of turns and diameter of the coil 123 and the volume of the first magnetic block 124.

[0052] like Figure 14 As shown, the magnetic excitation structure 13 includes a magnetic block carrier 131 and a second magnetic block 132; the material of the magnetic block carrier 131 is special engineering plastic, and is composed of a gear and a cylinder coaxially connected to the rear side of the gear, and the outer circumferential surface of the cylinder is circumferentially evenly distributed with square holes corresponding to the number of the magnetic excitation structure 13; the second magnetic blocks 132 are respectively arranged in the square holes of the cylinder and are interference fit with the square holes, and the same pole of the second magnetic blocks 132 faces outward; the second magnetic blocks 132 correspond one-to-one with the first magnetic blocks 124 and repel each other.

[0053] In this embodiment, four power generation units are connected into an integral power generation set by using ropes 9, and the power generation set is placed on the sea surface, and one or four sides of the power generation set are anchored with ropes to prevent the power generation set from being pushed closer to or away from the shore by the waves. Therefore, when the waves move up and down, they will drive the floating plates 2 to move up and down, causing the adjacent floating plates 2 to move relative to each other, thereby causing the angle between the driving rod 11 of the power generation module 1 and the support rod 106 to change. Since the support rod 106 is fixed to the power generation module 1, the driving rod 11 rotates about the main shaft 103, and the driving gear 107 keeps rotating synchronously with the driving rod 11 through the mortise and tenon structure, and then the gear group is used to increase the speed. Speed, so that the magnetic excitation structure 13 maintains a relatively high rotation speed. Due to the repulsive force of the second magnetic block 132 on the piezoelectric-electromagnetic composite power generation beam 12 on the first magnetic block 124, the magnetic excitation structure 13 will continuously excite the piezoelectric-electromagnetic composite power generation beam 12, causing high-frequency vibration of the piezoelectric-electromagnetic composite power generation beam 12, thereby causing the piezoelectric sheet 122 on the piezoelectric-electromagnetic composite power generation beam 12 to deform and the coil 123 to cut the magnetic flux lines, thereby outputting electrical energy. The voltage and current of the piezoelectric sheet 122 and the coil 123 in the power generation module 1 can be processed in series and parallel after rectification, transformation and filtering to adapt to the corresponding power usage environment.

[0054] Matters not described in detail in this invention are all known technologies.

[0055] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An array-type wave energy piezoelectric-electromagnetic composite power generation device, characterized by: The device is formed by connecting power generation units; the power generation unit includes a power generation module, a floating plate, a hinge support, a spindle and a rope; the spindle is respectively arranged on the four sides of the upper surface of the floating plate and is parallel to the four sides of the floating plate; the two ends of the spindle are respectively connected to the floating plate through the hinge support; the corresponding sides of two adjacent floating plates are connected by a rope; the power generation module is arranged between the upper sides of two adjacent floating plates, and the two ends of its bottom are respectively hinged to the spindles on the adjacent sides of the two floating plates; The power generation module includes a front shell, a rear shell, a main shaft, a support rod, a driving gear, a double gear, a clamping block, a driving rod, a piezoelectric-electromagnetic composite power generation beam and a magnetic excitation structure; the lower two sides of the front shell are respectively provided with square holes and slots, the inner center is provided with a blind hole, and one side of the inner part is provided with a protruding stepped shaft; the lower one side of the rear shell is provided with a square hole corresponding to the position of the hole above the front shell, the inner center is provided with a blind hole, and the inner side surfaces are evenly distributed with circumferential vertical plates corresponding to the magnetic excitation structures; the rear shell and the front shell are fixed to the corresponding The upper and lower ends of the driving rod and the support rod are provided with connecting holes, and the upper end of the driving rod passes through the notch of the front shell and fits in the middle of the main shaft; there are two support rods, which are respectively inserted into the corresponding square holes on the front shell and the rear shell, and the upper ends of the front and rear support rods pass through the shell and fit in the front and rear sides of the main shaft respectively, so that the support rod and the shell rotate synchronously, and the driving rod and the shell rotate relative to each other; a shaft sleeve is provided on the main shaft between the upper end of the driving rod and the upper end of the support rod located on the front shell; the front of the main shaft The rear ends are respectively interference fit with the blind holes in the center of the front shell and the rear shell; the driving gear is arranged on the rear side of the upper end of the driving rod and is clearance-fitted with the main shaft, and is fixedly connected to the upper end of the driving rod by a mortise and tenon structure, so that the driving gear and the driving rod keep rotating synchronously; the double gear is clearance-fitted with the stepped shaft extending from the inside of the front shell; the double gear is composed of a multi-tooth gear and a small-tooth gear connected coaxially, and the multi-tooth gear is located at the rear end of the stepped shaft, and the small-tooth gear is located at the front side of the multi-tooth gear; a shaft is sleeved between the double gear and the stepped shaft To the shaft sleeve; a retaining spring is provided between the rear end of the stepped shaft and the multi-tooth gear; the small-tooth gear is meshed with the driving gear; the magnetic excitation structure is clearance-matched with the side of the main shaft close to the rear shell, and meshes with the multi-tooth gear; a shaft sleeve is provided on the main shaft between the magnetic excitation structure and the upper end of the support rod located on the rear shell; the piezoelectric-electromagnetic composite power generation beams are respectively and evenly distributed circumferentially between the rear shell and the magnetic excitation structure; the head end of the piezoelectric-electromagnetic composite power generation beam is pressed against the corresponding circumferential vertical plate inside the rear shell by a clamping block.

2. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: The driving rod comprises an upper driving rod component, a flexible hinge and a lower driving rod component; the upper end of the upper driving rod component is provided with a connecting hole and is clearance-matched with the main shaft; the upper driving rod component and the lower driving rod component are rigid bodies, while the flexible hinge is a flexible body; the flexible hinge is connected between the bottom end of the upper driving rod component and the upper end of the lower driving rod component, and forms a snap-fit ​​structure, so that limited torsion is allowed between the upper driving rod component and the lower driving rod component while ensuring effective transmission of the force of the floating plate; the outer side of the bottom of the upper driving rod component is designed with a concave waterproof structure covering the side notch of the front shell; cylindrical protrusions are provided on both sides of the upper and lower connecting hole of the upper end of the upper driving rod component, so that the driving rod and the driving gear maintain synchronous rotation through the mortise and tenon principle; the lower end of the lower driving rod component is provided with a connecting hole with a hole diameter larger than the diameter of the spindle.

3. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 2, characterized in that: The piezoelectric-electromagnetic composite power generation beam includes a vibration beam, a piezoelectric sheet, a coil and a first magnetic block; the piezoelectric sheet is respectively bonded to the upper surface and the lower surface of the vibration beam; the coil is bonded to the end of the vibration beam; the first magnetic block is bonded between the end of the vibration beam and the coil; the same pole of the first magnetic block faces outward; the head end of the vibration beam is pressed against the corresponding circumferential vertical plate by a clamping block, and the clamping block and the two sides of the corresponding circumferential vertical plate are fixedly connected by bolts.

4. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 3, characterized in that: The magnetic excitation structure includes a magnetic block carrier and a second magnetic block; the material of the magnetic block carrier is special engineering plastic, and it consists of a gear and a cylinder coaxially connected to the rear side of the gear, and the outer circumferential surface of the cylinder is circumferentially evenly distributed with square holes corresponding to the number of magnetic excitation structures; the second magnetic blocks are respectively arranged in the square holes of the cylinder and interference fit with the square holes, and the same pole of the second magnetic blocks faces outward; the second magnetic blocks correspond one-to-one with the first magnetic blocks and repel each other.

5. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: The materials of the driving gear and the duplex gear are both special engineering plastics.

6. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: The floating plate is composed of a regular quadrangular pyramid and a regular quadrangular prism respectively fixed to the upper and lower surfaces of the regular quadrangular pyramid; wherein the four sides of the regular quadrangular prism located at the upper part are each provided with a pair of flanges, and the flanges are provided with circular holes as binding holes for ropes.

7. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: The length of the rope is adjusted according to the maximum floating board distance, and the rope has an inextensible characteristic.

8. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: The shape of the square holes on the front shell and the rear shell is the same as the cross-sectional size of the support rod, so that the support rod can rotate synchronously with the front shell and the rear shell; the width of the notch on the front shell is equal to the width of the drive rod.

9. The array-type wave energy piezoelectric-electromagnetic composite power generation device according to claim 1, characterized in that: A supporting structure and reinforcing ribs are provided in the middle of the support rod; connection holes are provided at the upper and lower ends of the support rod, and circular columns of a certain length extend from the lower connection hole to the front and rear sides respectively; the two support rods are respectively hinged to the core shaft on the same side of the floating plate, and the driving rod is hinged to the core shaft on the corresponding side of the adjacent floating plate.

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