A variable-spacing wake vibration energy harvesting device

Abstract

The present invention relates to the technical field of wake vibration energy harvesting, and specifically relates to a wake vibration energy harvesting device with variable spacing, which includes a fixed support, a wake vibration interference mechanism, and an energy harvesting mechanism. The fixed support includes a trough-shaped guide rail arranged longitudinally with the trough opening upwards, a front end wall is provided at the front end of the trough-shaped guide rail, and an open end is provided at the rear end. The wake vibration interference mechanism includes a front clamping base, a square columnar blunt body, a front clamping top seat, a front elastic beam, and two wind-receiving sheets. The energy harvesting mechanism includes a rear clamping base, a cylindrical blunt body, a rear clamping top seat, a rear elastic beam, and a piezoelectric composite fiber material sheet. It solves the problem of low energy harvesting efficiency of traditional wake vibration energy harvesting devices and is applicable to wake vibration energy harvesting.

Description

Technical Field

[0001] The present invention relates to the technical field of wake vibration energy harvesting, and particularly to a wake vibration energy harvesting device with variable spacing. Background Art

[0002] Wake vibration is a novel form of flow-induced vibration, which contains a large amount of energy. In order to utilize the energy contained in wake vibration, wake vibration energy harvesting devices have received extensive attention. However, in practical applications, due to the limitations of their own structures, traditional wake vibration energy harvesting devices cannot adaptively adjust the distance between the interference blunt body and the energy harvesting blunt body when the wind speed changes. Therefore, they cannot stably obtain a large-amplitude vibration response when the wind speed changes, resulting in low energy harvesting efficiency. Based on this, it is necessary to invent a wake vibration energy harvesting device with variable spacing to solve the problem of low energy harvesting efficiency of traditional wake vibration energy harvesting devices. Summary of the Invention

[0003] In order to solve the problem of low energy harvesting efficiency of traditional wake vibration energy harvesting devices, the present invention provides a wake vibration energy harvesting device with variable spacing.

[0004] The present invention is implemented by the following technical solutions:

[0005] A wake vibration energy harvesting device with variable spacing includes a fixed support, a wake vibration interference mechanism, and an energy harvesting mechanism;

[0006] The fixed support includes a trough-shaped guide rail arranged longitudinally with the notch facing upwards;

[0007] The front end of the trough-shaped guide rail is provided with an end wall, and the rear end is provided with an opening; a plurality of pairs of left-right symmetric hemispherical concave holes are formed on the inner side surface of the trough-shaped guide rail, and each pair of hemispherical concave holes is arranged at equal intervals from front to back; a strip-shaped concave cavity is formed on the inner bottom surface of the trough-shaped guide rail; a plurality of pairs of left-right symmetric pivot shafts are fixed on the side surface of the strip-shaped concave cavity, and each pair of pivot shafts is arranged at equal intervals from front to back; a cylindrical roller is rotatably supported on each pair of pivot shafts; a strip-shaped cover plate is fixedly sealed at the notch of the trough-shaped guide rail; a strip-shaped window is formed through the strip-shaped cover plate;

[0008] The wake vibration interference mechanism includes a front clamping base, a square-column-shaped blunt body, a front clamping top seat, a front elastic beam, and two wind-receiving sheets;

[0009] The front clamping base is slidably fitted into the inner cavity of the grooved guide rail, and the clamping groove of the front clamping base faces upward; the clamping groove of the front clamping base is exposed through the strip-shaped window; the back surface of the front clamping base is separably in contact with the outer sides of several cylindrical rollers; two symmetrically arranged left and right cylindrical concave holes are formed in the side surface of the front clamping base; a compression spring and a ball are respectively fitted in each cylindrical concave hole; the two balls respectively press the two compression springs, and the two balls are respectively separably inserted into a pair of hemispherical concave holes; a tension spring is fixed between the front side surface of the front clamping base and the front inner end surface of the grooved guide rail; the square-columnar blunt body is vertically arranged; the back surface of the front clamping top base is fixed to the lower end surface of the square-columnar blunt body, and the clamping groove of the front clamping top base faces downward; the front elastic beam is in a sheet structure; the upper end of the front elastic beam is clamped and fixed in the clamping groove of the front clamping top base; the lower end of the front elastic beam is clamped and fixed in the clamping groove of the front clamping base; two wind-receiving sheets are vertically and symmetrically fixed to the front surface of the front clamping base;

[0010] The energy harvesting mechanism includes a rear clamping base, a cylindrical blunt body, a rear clamping top base, a rear elastic beam, and a piezoelectric composite fiber material sheet;

[0011] The rear clamping base is fixedly fitted into the rear part of the inner cavity of the grooved guide rail, and the clamping groove of the rear clamping base faces upward; the clamping groove of the rear clamping base is exposed through the strip-shaped window; the cylindrical blunt body is vertically arranged; the back surface of the rear clamping top base is fixed to the lower end surface of the cylindrical blunt body, and the clamping groove of the rear clamping top base faces downward; the rear elastic beam is in a sheet structure; the upper end of the rear elastic beam is clamped and fixed in the clamping groove of the rear clamping top base; the lower end of the rear elastic beam is clamped and fixed in the clamping groove of the rear clamping base; the piezoelectric composite fiber material sheet is adhesively fixed to the lower part of the right side surface of the rear elastic beam.

[0012] Further, two fastening blind screw holes are formed in the rear part of the inner bottom surface of the grooved guide rail; two accommodation holes are formed through the rear part of the strip-shaped cover plate; two fastening holes are formed through the rear clamping base; two fastening bolts respectively penetrate through the two fastening holes, and the tails of the two fastening bolts are respectively screwed into the two fastening blind screw holes; the heads of the two fastening bolts are respectively located in the two accommodation holes.

[0013] Further, an assembly blind screw hole is formed at each of the four corners of the upper surface of the grooved guide rail; an assembly hole is formed through each of the four corners of the strip-shaped cover plate; four assembly bolts respectively penetrate through the four assembly holes in one-to-one correspondence, and the tails of the four assembly bolts are respectively screwed into the four assembly blind screw holes in one-to-one correspondence.

[0014] Further, a connecting blind screw hole is provided at each of the front part of the left outer side surface, the rear part of the left outer side surface, the front part of the right outer side surface, and the rear part of the right outer side surface of the grooved guide rail; the fixed support further includes four support rods, eight connecting angle members, sixteen connecting bolts, and twelve connecting nuts; the four support rods are all square rods; a strip-shaped chute with an inverted T-shaped cross-section is provided along the length direction on each of the four side surfaces of each support rod; the first support rod is arranged horizontally, and the middle part of the rear side surface of the first support rod contacts the front outer end surface of the grooved guide rail; the second support rod is arranged horizontally, and the middle part of the front side surface of the second support rod contacts the rear end surface of the grooved guide rail; the third support rod is arranged longitudinally, and both end surfaces of the third support rod contact the left part of the rear side surface of the first support rod and the left part of the front side surface of the second support rod respectively; the fourth support rod is arranged longitudinally, and both end surfaces of the fourth support rod contact the right part of the rear side surface of the first support rod and the right part of the front side surface of the second support rod respectively; eight connecting angle members are respectively and correspondingly embedded at the corners between the rear side surface of the first support rod and the right side surface of the third support rod, between the rear side surface of the first support rod and the left outer side surface of the grooved guide rail, between the rear side surface of the first support rod and the right outer side surface of the grooved guide rail, between the rear side surface of the first support rod and the left side surface of the fourth support rod, between the front side surface of the second support rod and the right side surface of the third support rod, between the front side surface of the second support rod and the left outer side surface of the grooved guide rail, between the front side surface of the second support rod and the right outer side surface of the grooved guide rail, between the front side surface of the second support rod and the left side surface of the fourth support rod; the eight pairs of connecting strip holes of the eight connecting angle members correspond to the four connecting blind screw holes, the left part of the strip-shaped chute on the rear side surface of the first support rod, the left middle part of the strip-shaped chute on the rear side surface of the first support rod, the right middle part of the strip-shaped chute on the rear side surface of the first support rod, the right part of the strip-shaped chute on the rear side surface of the first support rod, the left part of the strip-shaped chute on the front side surface of the second support rod, the left middle part of the strip-shaped chute on the front side surface of the second support rod, the right middle part of the strip-shaped chute on the front side surface of the second support rod, the right part of the strip-shaped chute on the front side surface of the second support rod, the front part of the strip-shaped chute on the right side surface of the third support rod, the rear part of the strip-shaped chute on the right side surface of the third support rod, the front part of the strip-shaped chute on the left side surface of the fourth support rod, and the rear part of the strip-shaped chute on the left side surface of the fourth support rod respectively; sixteen connecting bolts respectively and correspondingly penetrate through the eight pairs of connecting strip holes of the eight connecting angle members, and the heads of the sixteen connecting bolts all face outward; the tails of four of the connecting bolts are respectively and correspondingly screwed into the four connecting blind screw holes; twelve connecting nuts are respectively and correspondingly screwed onto the tails of the remaining twelve connecting bolts; each connecting nut is slidably embedded in the corresponding strip-shaped chute.

[0015] Furthermore, the grooved guide rail, strip-shaped cover plate, front clamping base, front clamping top seat, rear clamping base, and rear clamping top seat are all made of polylactic acid; the square-column blunt body and cylindrical blunt body are both made of polylactic acid or polystyrene foam; the front elastic beam and rear elastic beam are both made of steel or copper; the two wind-receiving pieces are both wing-shaped structures; the two compression springs are both springs with a base on one side; the two ball beads are both made of metal; the tension spring is a spring with bases on both sides.

[0016] Furthermore, the two fastening bolts are both hexagon socket head cap screws.

[0017] Furthermore, the four assembly bolts are both hexagon socket head cap screws.

[0018] Furthermore, the four support rods are all made of metal; the sixteen connecting bolts are both hexagon socket head cap screws; the twelve connecting nuts are all square nuts.

[0019] Compared with the traditional wake vibration energy harvesting device, the variable-spacing wake vibration energy harvesting device of the present invention realizes the adaptive adjustment of the distance between the interference blunt body (i.e., the square-column blunt body) and the energy harvesting blunt body (i.e., the cylindrical blunt body) when the wind speed changes by adopting a brand-new structure. Thus, on the one hand, the wake vibration energy is harvested by using vortex-induced vibration at a lower wind speed, and on the other hand, the wake vibration energy is harvested by using galloping at a higher wind speed, thereby achieving a stable and large vibration response when the wind speed changes, and effectively improving the energy harvesting efficiency.

[0020] The present invention effectively solves the problem of low energy harvesting efficiency of the traditional wake vibration energy harvesting device and is applicable to wake vibration energy harvesting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention.

[0022] Figure 2 is Figure 1 a partial structural schematic Figure 1 .

[0023] Figure 3 is Figure 2 a partial structural schematic diagram.

[0024] Figure 4 is Figure 3 a partial structural schematic diagram.

[0025] Figure 5 is Figure 4 a partial structural schematic diagram.

[0026] Figure 6 is Figure 5 another perspective structural schematic diagram.

[0027] Figure 7 is Figure 5 a partial structural schematic diagram of

[0028] Figure 8 is Figure 7 a structural schematic diagram from another angle of

[0029] Figure 9 a structural schematic diagram of the strip-shaped cover plate in the present invention.

[0030] Figure 10 a structural schematic diagram of the support rod in the present invention.

[0031] Figure 11 a structural schematic diagram of the connecting angle piece, a pair of connecting bolts, and a pair of connecting nuts in the present invention.

[0032] Figure 12 is Figure 1 a partial structural schematic of Figure 2 .

[0033] Figure 13 is Figure 12 a partial structural schematic diagram of

[0034] Figure 14 is Figure 13 a partial structural schematic diagram of

[0035] Figure 15 a structural schematic diagram of the front clamping base in the present invention.

[0036] Figure 16 a structural schematic diagram of one of the compression springs and one of the ball beads in the present invention.

[0037] Figure 17 a structural schematic diagram of another compression spring and another ball bead in the present invention.

[0038] Figure 18 a structural schematic diagram of the tension spring in the present invention.

[0039] Figure 19 is Figure 1 a partial structural schematic of Figure 3 .

[0040] Figure 20 a structural schematic diagram of the rear clamping base in the present invention.

[0041] Figure 21 is Figure 12 a structural schematic diagram from another angle of

[0042] Figure 22 is Figure 21 a partial structural schematic diagram of

[0043] Figure 23 is Figure 22 a partial structural schematic diagram of

[0044] Figure 24 is Figure 19 a structural schematic diagram of another angle of

[0045] Figure 25 is Figure 24 a partial structural schematic diagram of

[0046] Figure 26 is Figure 25 a partial structural schematic diagram of

[0047] In the figure: 101 - grooved guide rail, 101a - hemispherical concave hole, 101b - strip-shaped concave cavity, 101c - fastening blind screw hole, 101d - assembly blind screw hole, 101e - connection blind screw hole, 102 - pivot, 103 - cylindrical roller, 104 - strip-shaped cover plate, 104a - strip-shaped window, 104b - accommodation hole, 104c - assembly hole, 105 - assembly bolt, 106 - support rod, 107 - connecting angle piece, 108 - connecting bolt, 109 - connecting nut, 201 - front clamping base, 201a - cylindrical concave hole, 202 - square-columnar blunt body, 203 - front clamping top seat, 204 - front elastic beam, 205 - wind-receiving piece, 206 - compression spring, 207 - ball bead, 208 - tension spring, 301 - rear clamping base, 301a - fastening hole, 302 - cylindrical blunt body, 303 - rear clamping top seat, 304 - rear elastic beam, 305 - piezoelectric composite fiber material sheet, 306 - fastening bolt. Specific Embodiment

[0048] A variable-spacing wake vibration energy harvesting device includes a fixed support, a wake vibration interference mechanism, and an energy harvesting mechanism;

[0049] The fixed support includes a grooved guide rail 101 arranged longitudinally with the groove opening facing upward;

[0050] The front end of the grooved guide rail 101 is provided with an end wall and the rear end is provided with an opening; several pairs of left-right symmetric hemispherical concave holes 101a are opened on the inner side surface of the grooved guide rail 101, and each pair of hemispherical concave holes 101a are arranged equidistantly from front to back; a strip-shaped concave cavity 101b is opened on the inner bottom surface of the grooved guide rail 101; several pairs of left-right symmetric pivots 102 are fixed on the side surface of the strip-shaped concave cavity 101b, and each pair of pivots 102 are arranged equidistantly from front to back; a cylindrical roller 103 is rotatably supported on each pair of pivots 102; the groove opening of the grooved guide rail 101 is fixedly covered with a strip-shaped cover plate 104; a strip-shaped window 104a is penetrated and opened on the strip-shaped cover plate 104;

[0051] The wake vibration interference mechanism includes a front clamping base 201, a square-columnar blunt body 202, a front clamping top seat 203, a front elastic beam 204, and two wind-receiving sheets 205;

[0052] The front clamping base 201 is slidably and fitted into the inner cavity of the trough-shaped guide rail 101, and the clamping groove of the front clamping base 201 faces upward; the clamping groove of the front clamping base 201 is exposed through the strip-shaped window 104a; the back surface of the front clamping base 201 is separably in contact with the outer side surfaces of several cylindrical rollers 103; two symmetrically left and right cylindrical concave holes 201a are formed in the side surface of the front clamping base 201; a compression spring 206 and a ball bead 207 are fitted into each cylindrical concave hole 201a; the two ball beads 207 respectively press tightly against the two compression springs 206, and the two ball beads 207 are respectively separably embedded into a pair of hemispherical concave holes 101a; a tension spring 208 is fixed between the front side surface of the front clamping base 201 and the front inner end surface of the trough-shaped guide rail 101; the square-columnar blunt body 202 is vertically arranged; the back surface of the front clamping top seat 203 is fixed to the lower end surface of the square-columnar blunt body 202, and the clamping groove of the front clamping top seat 203 faces downward; the front elastic beam 204 is a sheet structure; the upper end of the front elastic beam 204 is clamped and fixed in the clamping groove of the front clamping top seat 203; the lower end of the front elastic beam 204 is clamped and fixed in the clamping groove of the front clamping base 201; the two wind-receiving sheets 205 are symmetrically and vertically fixed to the front surface of the front clamping base 201;

[0053] The energy harvesting mechanism includes a rear clamping base 301, a cylindrical blunt body 302, a rear clamping top seat 303, a rear elastic beam 304, and a piezoelectric composite fiber material sheet 305;

[0054] The rear clamping base 301 is fixedly and fitted into the rear part of the inner cavity of the trough-shaped guide rail 101, and the clamping groove of the rear clamping base 301 faces upward; the clamping groove of the rear clamping base 301 is exposed through the strip-shaped window 104a; the cylindrical blunt body 302 is vertically arranged; the back surface of the rear clamping top seat 303 is fixed to the lower end surface of the cylindrical blunt body 302, and the clamping groove of the rear clamping top seat 303 faces downward; the rear elastic beam 304 is a sheet structure; the upper end of the rear elastic beam 304 is clamped and fixed in the clamping groove of the rear clamping top seat 303; the lower end of the rear elastic beam 304 is clamped and fixed in the clamping groove of the rear clamping base 301; the piezoelectric composite fiber material sheet 305 is adhesively fixed to the lower part of the right side surface of the rear elastic beam 304.

[0055] During operation, the piezoelectric composite fiber material sheet 305 is connected to an external circuit through a copper core wire, and the present invention is placed in a wind environment such that the front side surfaces of the two wind-receiving sheets 205 face the wind.

[0056] The specific working process is as follows: When the wind speed is zero, the two wind-receiving pieces 205, the front clamping base 201, the front elastic beam 204, the front clamping top seat 203, and the square-columnar blunt body 202 are all in their initial positions, and the tension spring 208 is in a free state. When the wind speed is not zero, wind force is applied to the two wind-receiving pieces 205, causing the two wind-receiving pieces 205, the front clamping base 201, the front elastic beam 204, the front clamping top seat 203, and the square-columnar blunt body 202 to move backward together, and at the same time causing the tension spring 208 to elongate backward.

[0057] When the wind speed is low, the displacement of the square-columnar blunt body 202 is small, and the elongation of the tension spring 208 is small, resulting in a large distance between the square-columnar blunt body 202 and the cylindrical blunt body 302. At this time, the coupling effect between the square-columnar blunt body 202 and the cylindrical blunt body 302 is weak, and the cylindrical blunt body 302 generates vortex-induced vibration. Under the action of the vortex-induced vibration, the rear elastic beam 304 generates transverse vibration, which drives the piezoelectric composite fiber material sheet 305 to deform and output voltage, thereby converting the kinetic energy generated by the vibration into electrical energy, and realizing wake vibration energy harvesting using vortex-induced vibration at a low wind speed.

[0058] When the wind speed is high, the displacement of the square-columnar blunt body 202 is large, and the elongation of the tension spring 208 is large, resulting in a small distance between the square-columnar blunt body 202 and the cylindrical blunt body 302. At this time, the coupling effect between the square-columnar blunt body 202 and the cylindrical blunt body 302 is strong, and the cylindrical blunt body 302 generates galloping. Under the action of the galloping, the rear elastic beam 304 generates transverse vibration, which drives the piezoelectric composite fiber material sheet 305 to deform and output voltage, thereby converting the kinetic energy generated by the vibration into electrical energy, and realizing wake vibration energy harvesting using galloping at a high wind speed.

[0059] In the above process, the cylindrical roller 103 can reduce the friction when the front clamping base 201 moves backward. The compression spring 206 and the ball bead 207 can lock the front clamping base 201 in different positions.

[0060] Two fastening blind screw holes 101c are opened at the rear of the inner bottom surface of the trough-shaped guide rail 101; two receiving holes 104b are opened through the rear of the strip-shaped cover plate 104; two fastening holes 301a are opened through the rear clamping base 301; two fastening bolts 306 respectively penetrate through the two fastening holes 301a, and the tails of the two fastening bolts 306 are respectively screwed into the two fastening blind screw holes 101c; the heads of the two fastening bolts 306 are respectively located in the two receiving holes 104b.

[0061] At each of the four corners of the upper surface of the trough-shaped guide rail 101, an assembly blind screw hole 101d is provided; at each of the four corners of the strip-shaped cover plate 104, an assembly hole 104c is provided through; four assembly bolts 105 penetrate through the four assembly holes 104c in one-to-one correspondence, and the tails of the four assembly bolts 105 are screwed into the four assembly blind screw holes 101d in one-to-one correspondence.

[0062] A connecting blind screw hole 101e is provided at each of the front part of the left outer side surface, the rear part of the left outer side surface, the front part of the right outer side surface, and the rear part of the right outer side surface of the channel-shaped guide rail 101; the fixed support further includes four support rods 106, eight connecting angle members 107, sixteen connecting bolts 108, and twelve connecting nuts 109; the four support rods 106 are all square rods; a strip-shaped chute with an inverted T-shaped cross-section is provided along the length direction on each of the four side surfaces of each support rod 106; the first support rod 106 is arranged horizontally, and the middle part of the rear side surface of the first support rod 106 contacts the front outer end surface of the channel-shaped guide rail 101; the second support rod 106 is arranged horizontally, and the middle part of the front side surface of the second support rod 106 contacts the rear end surface of the channel-shaped guide rail 101; the third support rod 106 is arranged longitudinally, and both end surfaces of the third support rod 106 contact the left part of the rear side surface of the first support rod 106 and the left part of the front side surface of the second support rod 106 respectively; the fourth support rod 106 is arranged longitudinally, and both end surfaces of the fourth support rod 106 contact the right part of the rear side surface of the first support rod 106 and the right part of the front side surface of the second support rod 106 respectively; eight connecting angle members 107 are respectively and correspondingly embedded at the corners between the rear side surface of the first support rod 106 and the right side surface of the third support rod 106, between the rear side surface of the first support rod 106 and the left outer side surface of the channel-shaped guide rail 101, between the rear side surface of the first support rod 106 and the right outer side surface of the channel-shaped guide rail 101, between the rear side surface of the first support rod 106 and the left side surface of the fourth support rod 106, between the front side surface of the second support rod 106 and the right side surface of the third support rod 106, between the front side surface of the second support rod 106 and the left outer side surface of the channel-shaped guide rail 101, between the front side surface of the second support rod 106 and the right outer side surface of the channel-shaped guide rail 101, between the front side surface of the second support rod 106 and the left side surface of the fourth support rod 106; the eight pairs of connecting strip holes of the eight connecting angle members 107 correspond to the four connecting blind screw holes 101e, the left part of the strip-shaped chute on the rear side surface of the first support rod 106, the left middle part of the strip-shaped chute on the rear side surface of the first support rod 106, the right middle part of the strip-shaped chute on the rear side surface of the first support rod 106, the right part of the strip-shaped chute on the rear side surface of the first support rod 106, the left part of the strip-shaped chute on the front side surface of the second support rod 106, the left middle part of the strip-shaped chute on the front side surface of the second support rod 106, the right middle part of the strip-shaped chute on the front side surface of the second support rod 106, the right part of the strip-shaped chute on the front side surface of the second support rod 106, the front part of the strip-shaped chute on the right side surface of the third support rod 106, the rear part of the strip-shaped chute on the right side surface of the third support rod 106, the front part of the strip-shaped chute on the left side surface of the fourth support rod 106, and the rear part of the strip-shaped chute on the left side surface of the fourth support rod 106 respectively; sixteen connecting bolts 108 respectively and correspondingly penetrate through the eight pairs of connecting strip holes of the eight connecting angle members 107, and the heads of the sixteen connecting bolts 108 all face outwards;The tails of four connecting bolts 108 are screwed into four connecting blind screw holes 101e one by one; twelve connecting nuts 109 are screwed onto the tails of the remaining twelve connecting bolts 108 one by one; each connecting nut 109 is slidably fitted into the corresponding strip-shaped chute.

[0063] The channel-shaped guide rail 101, the strip-shaped cover plate 104, the front clamping base 201, the front clamping top seat 203, the rear clamping base 301, and the rear clamping top seat 303 are all made of polylactic acid; the square-columnar blunt body 202 and the cylindrical blunt body 302 are both made of polylactic acid or polystyrene foam; the front elastic beam 204 and the rear elastic beam 304 are both made of steel or copper; the two wind-receiving pieces 205 are both wing-shaped structures; the two compression springs 206 are both springs with a base on one side; the two ball beads 207 are both made of metal; the tension spring 208 is a spring with bases on both sides.

[0064] The two fastening bolts 306 are both hexagon socket head cap screws.

[0065] The four assembly bolts 105 are both hexagon socket head cap screws.

[0066] The four support rods 106 are all made of metal; the sixteen connecting bolts 108 are all hexagon socket head cap screws; the twelve connecting nuts 109 are all square nuts.

[0067] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A variable-spacing wake vibration energy harvesting device, characterized in that: It includes a fixed support, a wake vibration interference mechanism, and an energy collection mechanism; The fixed support comprises a grooved guide rail (101) which is arranged longitudinally and has a groove facing upwards; The front end of the grooved guide rail (101) is provided with an end wall, and the rear end is provided with an opening; the inner side surface of the grooved guide rail (101) is provided with a plurality of pairs of bilaterally symmetrical hemispherical concave holes (101a), and each pair of hemispherical concave holes (101a) is arranged equidistantly from front to back; the inner bottom surface of the grooved guide rail (101) is provided with a strip-shaped concave cavity (101b); the side surface of the strip-shaped concave cavity (101b) is fixed with a plurality of pairs of bilaterally symmetrical pivots (102), and each pair of pivots (102) is arranged equidistantly from front to back; each pair of pivots (102) is supported and rotatably supported by a cylindrical roller (103); the groove of the grooved guide rail (101) is fixedly covered with a strip cover plate (104); a strip window (104a) is provided through the strip cover plate (104); The wake vibration interference mechanism comprises a front clamping base (201), a square columnar blunt head body (202), a front clamping top seat (203), a front elastic beam (204), and two wind receiving plates (205); The front clamping base (201) is slidably embedded in the inner cavity of the grooved guide rail (101), and the clamping groove of the front clamping base (201) faces upward; the clamping groove of the front clamping base (201) is exposed through the strip window (104a); the back of the front clamping base (201) is in detachable contact with the outer side surfaces of several cylindrical rollers (103); the side surface of the front clamping base (201) is provided with two left-right symmetrical cylindrical recessed holes (201a); each cylindrical recessed hole (201a) is embedded with a compression spring (206) and a ball (207); the two balls (207) respectively press the two compression springs (206), and the two balls (207) are respectively detachably embedded in one of the pairs of The front clamping base (201) is provided with a tension spring (208) fixed between the front side surface of the front clamping base (201) and the front inner end surface of the grooved guide rail (101); the square columnar blunt head body (202) is arranged upright; the back surface of the front clamping top seat (203) is fixed to the lower end surface of the square columnar blunt head body (202), and the clamping groove of the front clamping top seat (203) faces downward; the front elastic beam (204) is a sheet structure; the upper end of the front elastic beam (204) is clamped and fixed in the clamping groove of the front clamping top seat (203); the lower end of the front elastic beam (204) is clamped and fixed in the clamping groove of the front clamping base (201); two wind receiving sheets (205) are symmetrically fixed upright on the front side of the front clamping base (201); The energy collection mechanism comprises a rear clamping base (301), a cylindrical blunt head body (302), a rear clamping top seat (303), a rear elastic beam (304), and a piezoelectric composite fiber material sheet (305); The rear clamping base (301) is fixedly embedded in the rear part of the inner cavity of the grooved guide rail (101), and the clamping groove of the rear clamping base (301) faces upward; the clamping groove of the rear clamping base (301) is exposed through the strip window (104a); the cylindrical blunt head body (302) is arranged upright; the back side of the rear clamping top seat (303) is fixed to the lower end face of the cylindrical blunt head body (302), and the clamping groove of the rear clamping top seat (303) faces downward; the rear elastic beam (304) is a sheet structure; the upper end of the rear elastic beam (304) is clamped and fixed in the clamping groove of the rear clamping top seat (303); the lower end of the rear elastic beam (304) is clamped and fixed in the clamping groove of the rear clamping base (301); and the piezoelectric composite fiber material sheet (305) is adhered and fixed to the lower part of the right side of the rear elastic beam (304).

2. The variable-spacing wake vibration energy harvesting device according to claim 1, characterized in that: The inner bottom surface of the grooved guide rail (101) is provided with two blind fastening screw holes (101c) at the rear; the strip cover plate (104) is provided with two receiving holes (104b) at the rear; the rear clamping base (301) is provided with two fastening holes (301a); two fastening bolts (306) are respectively passed through the two fastening holes (301a), and the tail ends of the two fastening bolts (306) are respectively screwed into the two blind fastening screw holes (101c); and the heads of the two fastening bolts (306) are respectively located in the two receiving holes (104b).

3. The variable-spacing wake vibration energy harvesting device according to claim 1, characterized in that: A blind assembly screw hole (101d) is provided at each of the four corners of the upper surface of the grooved guide rail (101); a through assembly hole (104c) is provided at each of the four corners of the strip cover plate (104); four assembly bolts (105) are passed through the four assembly holes (104c) in a one-to-one correspondence, and the tail ends of the four assembly bolts (105) are screwed into the four blind assembly screw holes (101d) in a one-to-one correspondence.

4. The variable-spacing wake vibration energy harvesting device according to claim 1, characterized in that: A connecting blind screw hole (101e) is respectively provided at the left outer front part, the left outer side rear part, the right outer front part and the right outer side rear part of the groove-shaped guide rail (101); the fixed support further comprises four support rods (106), eight connecting angle pieces (107), sixteen connecting bolts (108) and twelve connecting nuts (109); the four support rods (106) are all square rods; a strip-shaped sliding groove with an inverted T-shaped cross section is provided on the four sides of each support rod (106) along the length direction; the first support rod (106) is arranged horizontally, and The middle portion of the rear side surface of the first support rod (106) contacts the front outer end surface of the grooved guide rail (101); the second support rod (106) is arranged transversely, and the middle portion of the front side surface of the second support rod (106) contacts the rear end surface of the grooved guide rail (101); the third support rod (106) is arranged longitudinally, and the two end surfaces of the third support rod (106) respectively contact the left portion of the rear side surface of the first support rod (106) and the left portion of the front side surface of the second support rod (106); the fourth support rod (106) is arranged longitudinally, and the fourth support rod The two end surfaces of (106) are in contact with the right part of the rear side surface of the first support rod (106) and the right part of the front side surface of the second support rod (106) respectively; the eight connecting corner pieces (107) are respectively embedded in the corners between the rear side surface of the first support rod (106) and the right side surface of the third support rod (106), the corners between the rear side surface of the first support rod (106) and the left outer side surface of the grooved guide rail (101), the corners between the rear side surface of the first support rod (106) and the right outer side surface of the grooved guide rail (101), and the corners between the rear side surface of the first support rod (106) and the right outer side surface of the grooved guide rail (101). The corner between the rear side of the support rod (106) and the left side of the fourth support rod (106), the corner between the front side of the second support rod (106) and the right side of the third support rod (106), the corner between the front side of the second support rod (106) and the left outer side of the grooved guide rail (101), the corner between the front side of the second support rod (106) and the right outer side of the grooved guide rail (101), and the corner between the front side of the second support rod (106) and the left side of the fourth support rod (106);The eight pairs of connecting strip holes of the eight connecting angle pieces (107) and the four connecting blind screw holes (101e), the left portion of the strip slide on the rear side of the first support rod (106), the left middle portion of the strip slide on the rear side of the first support rod (106), the right middle portion of the strip slide on the rear side of the first support rod (106), the right portion of the strip slide on the rear side of the first support rod (106), the left portion of the strip slide on the front side of the second support rod (106), the left middle portion of the strip slide on the front side of the second support rod (106), the right middle portion of the strip slide on the front side of the second support rod (106), the right portion of the strip slide on the front side of the second support rod (106), and the front portion of the strip slide on the right side of the third support rod (106). The first and second connecting rods (107) are connected to the third supporting rod (106), the second and third supporting rods (106), and the third supporting rods (106) are connected to the fourth supporting rod (106). ...

5. The variable-spacing wake vibration energy collection device according to claim 1, characterized in that: The grooved guide rail (101), the strip cover plate (104), the front clamping base (201), the front clamping top seat (203), the rear clamping base (301), and the rear clamping top seat (303) are all made of polylactic acid; the square column blunt head body (202) and the cylindrical blunt head body (302) are all made of polylactic acid or polystyrene foam plastic; the front elastic beam (204) and the rear elastic beam (304) are all made of steel or copper; the two wind receiving pieces (205) are both wing-shaped structures; the two compression springs (206) are both springs with a base on one side; the two balls (207) are both made of metal; and the tension spring (208) is a spring with a base on both sides.

6. The variable-spacing wake vibration energy collection device according to claim 2, characterized in that: Both fastening bolts (306) are hexagon socket head bolts.

7. The variable-spacing wake vibration energy collection device according to claim 3, characterized in that: The four mounting bolts (105) are all hexagon socket head bolts.

8. The variable-spacing wake vibration energy collection device according to claim 4, characterized in that: The four support rods (106) are all made of metal; the sixteen connecting bolts (108) are all hexagon socket bolts; and the twelve connecting nuts (109) are all square nuts.

Images