CN113839584B - Prestressing force bistable relaxation energy collecting device - Google Patents
Prestressing force bistable relaxation energy collecting device Download PDFInfo
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- CN113839584B CN113839584B CN202111366389.8A CN202111366389A CN113839584B CN 113839584 B CN113839584 B CN 113839584B CN 202111366389 A CN202111366389 A CN 202111366389A CN 113839584 B CN113839584 B CN 113839584B
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Abstract
The invention relates to a relaxation energy collecting device, in particular to a prestress bistable relaxation energy collecting device. The invention solves the problems that the traditional relaxation vibration energy collecting device has lower energy collecting efficiency in low-speed and variable-speed fluid and can generate electromagnetic interference in the process of widening the range of working flow velocity. The prestress bistable relaxation energy collecting device comprises a fixed support, a prestress adjusting mechanism and an energy conversion mechanism; the fixing support comprises a metal square rod A, a metal square rod B, a metal square rod C, a metal square rod D, six connecting corner pieces, six pairs of square head bolts A and six pairs of compression nuts A; the prestress adjusting mechanism comprises a clamping seat A, two square head bolts B, two compression nuts B, an adjusting seat, four fastening bolts A, an adjusting slide block, two bearings, an adjusting screw, an adjusting knob, two guide rods, a clamping seat B and two fastening bolts B. The invention is suitable for collecting relaxation energy.
Description
Technical Field
The invention relates to a relaxation energy collecting device, in particular to a prestress bistable relaxation energy collecting device.
Background
Relaxation is a typical flow-induced vibration phenomenon that can be regarded as a divergent self-excited excitation that causes the amplitude of the structure to increase over time, thus implying considerable energy. In order to utilize the energy contained in the relaxation vibration, the relaxation vibration energy collecting device is widely focused. However, in practical applications, the conventional relaxation energy collecting device has the following problems: first, due to the high natural frequency, conventional relaxation energy harvesting devices suffer from low energy harvesting efficiency in low speed and variable speed fluids. Secondly, due to the adoption of a magnetic coupling principle, the traditional relaxation energy collecting device can generate electromagnetic interference in the process of widening the range of the working flow speed, so that the normal use of the electronic element connected with the relaxation energy collecting device is influenced. Based on this, it is necessary to invent a pre-stress bistable relaxation energy collecting device to solve the problems that the conventional relaxation energy collecting device has low energy collecting efficiency in low-speed and variable-speed fluid and electromagnetic interference can be generated in the process of widening the range of the working flow rate.
Disclosure of Invention
The invention provides a prestress bistable relaxation energy collecting device, which aims to solve the problems that the traditional relaxation energy collecting device has lower energy collecting efficiency in low-speed and variable-speed fluid and can generate electromagnetic interference in the process of widening the range of working flow velocity.
The invention is realized by adopting the following technical scheme:
the prestress bistable relaxation energy collecting device comprises a fixed support, a prestress adjusting mechanism and an energy conversion mechanism;
the fixing support comprises a metal square rod A, a metal square rod B, a metal square rod C, a metal square rod D, six connecting corner pieces, six pairs of square head bolts A and six pairs of compression nuts A;
the metal square rod A and the metal square rod B are transversely arranged; the metal square rod C is longitudinally arranged; the front end surface of the metal square rod C is contacted with the middle part of the rear side surface of the metal square rod A; the rear end face of the metal square rod C is contacted with the middle part of the front side face of the metal square rod B; the metal square rod D is vertically arranged, and the lower end surface of the metal square rod D is contacted with the middle part of the upper side surface of the metal square rod C; four side surfaces of the metal square rod A, four side surfaces of the metal square rod B, four side surfaces of the metal square rod C and four side surfaces of the metal square rod D are provided with a strip-shaped chute along the length direction; the groove cavity of each strip-shaped chute is an inverted T-shaped groove cavity;
the pair of outer side surfaces of the first connecting corner fitting are respectively contacted with the rear side surface of the metal square rod A and the left side surface of the metal square rod C, and the pair of connecting strip holes of the first connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the rear side surface of the metal square rod A and the strip-shaped sliding groove on the left side surface of the metal square rod C; the pair of outer side surfaces of the second connecting corner fitting are respectively contacted with the rear side surface of the metal square rod A and the right side surface of the metal square rod C, and the pair of connecting strip holes of the second connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the rear side surface of the metal square rod A and the strip-shaped sliding groove on the right side surface of the metal square rod C; a pair of outer side surfaces of the third connecting corner fitting are respectively contacted with the front side surface of the metal square rod B and the left side surface of the metal square rod C, and a pair of connecting strip holes of the third connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the front side surface of the metal square rod B and the strip-shaped sliding groove on the left side surface of the metal square rod C; a pair of outer side surfaces of the fourth connecting corner fitting are respectively contacted with the front side surface of the metal square rod B and the right side surface of the metal square rod C, and a pair of connecting strip holes of the fourth connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the front side surface of the metal square rod B and the strip-shaped sliding groove on the right side surface of the metal square rod C; a pair of outer side surfaces of the fifth connecting corner fitting are respectively contacted with the upper side surface of the metal square rod C and the front side surface of the metal square rod D, and a pair of connecting strip holes of the fifth connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the upper side surface of the metal square rod C and the strip-shaped sliding groove on the front side surface of the metal square rod D; a pair of outer side surfaces of the sixth connecting corner fitting are respectively contacted with the upper side surface of the metal square rod C and the rear side surface of the metal square rod D, and a pair of connecting strip holes of the sixth connecting corner fitting are respectively corresponding to the strip-shaped sliding groove on the upper side surface of the metal square rod C and the strip-shaped sliding groove on the rear side surface of the metal square rod D;
the heads of the first square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the rear side surface of the metal square rod A and the strip-shaped sliding groove on the left side surface of the metal square rod C, and the first square head bolts A respectively penetrate through a pair of connecting strip holes of the first connecting corner piece; the heads of the second square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the rear side surface of the metal square rod A and the strip-shaped sliding groove on the right side surface of the metal square rod C, and the second square head bolts A respectively penetrate through a pair of connecting strip holes of the second connecting corner piece; the heads of the third square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the front side surface of the metal square rod B and the strip-shaped sliding groove on the left side surface of the metal square rod C, and the third square head bolts A respectively penetrate through a pair of connecting strip holes of the third connecting corner piece; the heads of the fourth square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the front side surface of the metal square rod B and the strip-shaped sliding groove on the right side surface of the metal square rod C, and the fourth square head bolts A respectively penetrate through a pair of connecting strip holes of the fourth connecting corner piece; the heads of the fifth pair of square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the upper side surface of the metal square rod C and the strip-shaped sliding groove on the front side surface of the metal square rod D, and the fifth pair of square head bolts A respectively penetrate through a pair of connecting strip holes of the fifth connecting corner piece; the heads of the sixth pair of square head bolts A are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove on the upper side surface of the metal square rod C and the strip-shaped sliding groove on the rear side surface of the metal square rod D, and the sixth pair of square head bolts A respectively penetrate through a pair of connecting strip holes of the sixth connecting corner piece; six pairs of compression nuts A are screwed at the tail ends of the six pairs of square head bolts A in a one-to-one correspondence manner;
the prestress adjusting mechanism comprises a clamping seat A, two square head bolts B, two compression nuts B, an adjusting seat, four fastening bolts A, an adjusting slide block, two bearings, an adjusting screw rod, an adjusting knob, two guide rods, a clamping seat B and two fastening bolts B;
the clamping seat A comprises a runway-shaped longitudinal vertical plate, a rectangular longitudinal vertical plate which is arranged on the front end surface of the runway-shaped longitudinal vertical plate in an extending mode, and two protruding blocks which are arranged on the right side surface of the rectangular longitudinal vertical plate in an extending mode and are arranged up and down; the left side surface of the runway-shaped longitudinal vertical plate is contacted with the right side surface of the metal square rod D; two assembly holes A which are arranged up and down and four assembly holes B which are arranged in a rectangular shape are arranged between the left side surface and the right side surface of the runway-shaped longitudinal vertical plate in a penetrating way; the two assembly holes A correspond to the strip-shaped sliding grooves on the right side surface of the metal square rod D; a clamping groove A is formed between the front side surface and the rear side surface of each lug in a penetrating way, and the notch of the two clamping grooves A are opposite to each other vertically;
the heads of the two square head bolts B are slidably embedded in the groove cavity of the strip-shaped chute on the right side surface of the metal square rod D, and the two square head bolts B respectively penetrate through the two assembly holes A; the two compression nuts B are respectively screwed at the tail ends of the two square head bolts B;
the adjusting seat comprises a square longitudinal vertical plate and two convex ribs which are arranged on the right side surface of the square longitudinal vertical plate in an extending way and are arranged front and back; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the runway-shaped longitudinal vertical plate of the clamping seat A; two screw holes A which are vertically arranged are arranged between the right side surface of each convex rib and the left side surface of the square longitudinal vertical plate in a penetrating way, and the four screw holes A are opposite to the four assembly holes B one by one; a supporting hole is formed between the middle part of the front side surface and the middle part of the rear side surface of each rib in a penetrating way, and the two supporting holes are opposite to each other front and back; the back side surface of the first rib and the front side surface of the second rib are respectively provided with two supporting grooves which are arranged up and down;
the four fastening bolts A penetrate through the four assembly holes B in a one-to-one correspondence manner, and the tail ends of the four fastening bolts A are screwed in the four screw holes A in a one-to-one correspondence manner;
the left side surface of the adjusting slide block is contacted with the right side surface of the square longitudinal vertical plate of the adjusting seat; two screw holes B which are arranged up and down are arranged between the left side surface and the right side surface of the adjusting slide block in a penetrating way; screw holes C and two guide holes which are arranged up and down are arranged between the front side surface and the rear side surface of the adjusting slide block in a penetrating way;
the adjusting screw rod penetrates through the screw hole C, and two ends of the adjusting screw rod are respectively supported in the two supporting holes in a rotating way through two bearings;
the adjusting knob is coaxially fixed on the rear end face of the adjusting screw;
the two guide rods respectively penetrate through the two guide holes; the front ends of the two guide rods are respectively inserted into the two supporting grooves on the first convex edge; the rear ends of the two guide rods are respectively inserted into the two supporting grooves on the second convex edge;
the clamping seat B comprises a square longitudinal vertical plate, a rectangular longitudinal vertical plate extending to the front end surface of the square longitudinal vertical plate and a lug extending to the left side surface of the rectangular longitudinal vertical plate; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the adjusting slide block; two assembly holes C which are vertically arranged are arranged between the left side surface and the right side surface of the square longitudinal vertical plate in a penetrating way, and the two assembly holes C are opposite to the two screw holes B respectively; a clamping groove B with a frontward notch is arranged between the upper side surface and the lower side surface of the lug in a penetrating way, and the upper end and the lower end of the clamping groove B respectively correspond to the notches of the two clamping grooves A;
the two fastening bolts B respectively penetrate through the two assembly holes C, and tail ends of the two fastening bolts B are respectively screwed into the two screw holes B;
the energy conversion mechanism comprises an elastic beam, a pair of piezoelectric composite fiber material sheets, a square column-shaped blunt body and a connecting seat;
the elastic beam is longitudinally arranged; two isolation gaps which are arranged along the length direction and are arranged up and down are arranged between the left side surface and the right side surface of the elastic beam in a penetrating way; the front ends of the two isolation gaps are closed, and the rear ends of the two isolation gaps are communicated with the rear end face of the elastic beam; the elastic beam is divided into an upper beam section, a middle beam section and a lower beam section by two isolation gaps; the rear ends of the upper beam section and the lower beam section are fixedly embedded in the two clamping grooves A respectively; the rear end of the middle beam section is fixedly embedded in the clamping groove B;
a pair of piezoelectric composite fiber material sheets are adhered and fixed on the left side surface and the right side surface of the middle beam section of the elastic beam in a bilateral symmetry way respectively;
the square column-shaped blunt body is vertically arranged, and the square column-shaped blunt body is fixed at the front end of the elastic beam through the connecting seat.
When the device works, a pair of piezoelectric composite fiber material sheets are connected with an external circuit through a lead, then prestress is applied to an elastic beam (the specific step of applying the prestress is that an adjusting knob is rotated positively, the adjusting knob drives an adjusting screw to rotate positively, the adjusting screw drives an adjusting slide block to move forward, the adjusting slide block drives a clamping seat B to move forward, and the clamping seat B presses the middle beam section of the elastic beam forward, so that the middle beam section of the elastic beam generates a certain degree of buckling to form a bistable structure), and then the prestress bistable relaxation energy collecting device is placed in fluid. When fluid flows through the square cylindrical blunt body, a relaxation force with a negative damping effect is generated. Under the action of the relaxation force, the middle beam section of the elastic beam generates transverse vibration and frequently jumps between two stable states, so that a pair of piezoelectric composite fiber material sheets generate buckling states, and the large-scale strain energy is converted into electric energy, and the relaxation energy collection is realized. In the process, the size of the prestress can be adjusted by rotating the adjusting knob, so that the distance between the bistable potential energy wells is changed. The specific adjusting process is as follows: if the prestress needs to be increased, the adjusting knob is continuously rotated in the forward direction, the adjusting knob is continuously driven to rotate in the forward direction, the adjusting screw is continuously driven to move the adjusting slide block forward, and the adjusting slide block is continuously driven to move the clamping seat B forward, so that the extrusion force born by the middle beam section of the elastic beam is increased, the buckling degree of the middle beam section of the elastic beam is increased, and the prestress is increased. If the prestress is required to be reduced, the adjusting knob is reversely rotated, the adjusting knob drives the adjusting screw to reversely rotate, the adjusting screw drives the adjusting slide block to move backwards, and the adjusting slide block drives the clamping seat B to move backwards, so that the extrusion force born by the middle beam section of the elastic beam is reduced, the buckling degree of the middle beam section of the elastic beam is reduced, and the prestress is reduced.
Based on the above process, compared with the traditional relaxation energy collecting device, the prestress bistable relaxation energy collecting device provided by the invention has the following advantages: firstly, the invention uses the prestress bistable state to widen the flow velocity range for realizing large vibration response, thereby reducing the potential barrier height and the coupling frequency. Therefore, in low-speed and variable-speed fluid, the invention can realize great inter-trap vibration response and convert great vibration energy into electric energy, thereby effectively widening the range of working flow velocity and further effectively improving the energy collection efficiency. Secondly, the invention does not adopt the magnetic coupling principle any more, thereby avoiding electromagnetic interference generated in the process of widening the range of the working flow rate, and effectively ensuring the normal use of the electronic element connected with the electromagnetic interference.
The device has reasonable structure and ingenious design, effectively solves the problems that the traditional relaxation energy collecting device has lower energy collecting efficiency in low-speed and variable-speed fluid and can generate electromagnetic interference in the process of widening the range of working flow velocity, and is suitable for relaxation energy collection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the left view of fig. 1 rotated 90 degrees counterclockwise.
Fig. 3 is a schematic diagram of the right view of fig. 1 rotated 90 degrees counterclockwise.
Fig. 4 is a top view of fig. 1.
FIG. 5 is a schematic structural view of the prestressing force adjusting mechanism in the present invention.
Fig. 6 is a left side view of fig. 5.
Fig. 7 is a right side view of fig. 5.
Fig. 8 is a top view of fig. 5.
Fig. 9 is a schematic structural view of a clamping seat a in the present invention.
Fig. 10 is a left side view of fig. 9.
Fig. 11 is a right side view of fig. 9.
Fig. 12 is a top view of fig. 9.
Fig. 13 is a schematic view of the structure of the adjusting seat, the adjusting slide block, the bearing, the adjusting screw, the adjusting knob and the guide rod in the present invention.
Fig. 14 is a left side view of fig. 13.
Fig. 15 is a right side view of fig. 13.
Fig. 16 is a top view of fig. 13.
Fig. 17 is a schematic view of the structure of the adjusting seat in the present invention.
Fig. 18 is a left side view of fig. 17.
Fig. 19 is a right side view of fig. 17.
Fig. 20 is a top view of fig. 17.
Fig. 21 is a schematic view of the structure of the adjusting slider in the present invention.
Fig. 22 is a left side view of fig. 21.
Fig. 23 is a right side view of fig. 21.
Fig. 24 is a top view of fig. 21.
Fig. 25 is a schematic structural view of a clamping seat B in the present invention.
Fig. 26 is a left side view of fig. 25.
Fig. 27 is a right side view of fig. 25.
Fig. 28 is a top view of fig. 25.
Fig. 29 is a schematic view of the structure of the bearing, the adjusting screw, and the adjusting knob of the present invention.
Fig. 30 is a schematic view of the structure of the elastic beam in the present invention.
Fig. 31 is a schematic structural view of a connection base according to the present invention.
Fig. 32 is a left side view of fig. 31.
Fig. 33 is a top view of fig. 31.
In the figure: the device comprises the following components of a 101-metal square rod A, a 102-metal square rod B, a 103-metal square rod C, a 104-metal square rod D, 105-connection corner pieces, 106-square head bolts A, 107-compression nuts A, 108-strip-shaped sliding grooves, 201-clamping seats A, 202-square head bolts B, 203-compression nuts B, 204-adjusting seats, 205-fastening bolts A, 206-adjusting sliding blocks, 207-bearings, 208-adjusting screws, 209-adjusting knobs, 210-guide rods, 211-clamping seats B, 212-fastening bolts B, 213-assembly holes A, 214-assembly holes B, 215-clamping grooves A, 216-screw holes A, 217-support holes, 218-screw holes B, 219-screw holes C, 220-guide holes, 221-assembly holes C, 222-clamping grooves B, 301-elastic beams, 302-piezoelectric composite fiber material sheets, 303-square cylindrical blunt bodies, 304-isolation gaps, 305-connection grooves and 306-connection grooves.
Detailed Description
The prestress bistable relaxation energy collecting device comprises a fixed support, a prestress adjusting mechanism and an energy conversion mechanism;
the fixed support comprises a metal square rod A101, a metal square rod B102, a metal square rod C103, a metal square rod D104, six connecting corner pieces 105, six pairs of square head bolts A106 and six pairs of compression nuts A107;
the metal square rod A101 and the metal square rod B102 are transversely arranged; the metal square rod C103 is longitudinally arranged; the front end surface of the metal square rod C103 is contacted with the middle part of the rear side surface of the metal square rod A101; the rear end face of the metal square rod C103 is contacted with the middle part of the front side face of the metal square rod B102; the metal square rod D104 is vertically arranged, and the lower end surface of the metal square rod D104 is contacted with the middle part of the upper side surface of the metal square rod C103; four sides of the metal square rod A101, four sides of the metal square rod B102, four sides of the metal square rod C103 and four sides of the metal square rod D104 are provided with a strip-shaped chute 108 along the length direction; the groove cavity of each strip-shaped chute 108 is an inverted T-shaped groove cavity;
a pair of outer side surfaces of the first connecting corner fitting 105 are respectively contacted with the rear side surface of the metal square rod A101 and the left side surface of the metal square rod C103, and a pair of connecting strip holes of the first connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 of the rear side surface of the metal square rod A101 and the strip-shaped sliding groove 108 of the left side surface of the metal square rod C103; a pair of outer side surfaces of the second connecting corner fitting 105 are respectively contacted with the rear side surface of the metal square rod A101 and the right side surface of the metal square rod C103, and a pair of connecting strip holes of the second connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 of the rear side surface of the metal square rod A101 and the strip-shaped sliding groove 108 of the right side surface of the metal square rod C103; a pair of outer side surfaces of the third connecting corner fitting 105 are respectively contacted with the front side surface of the metal square rod B102 and the left side surface of the metal square rod C103, and a pair of connecting strip holes of the third connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 on the front side surface of the metal square rod B102 and the strip-shaped sliding groove 108 on the left side surface of the metal square rod C103; a pair of outer side surfaces of the fourth connecting corner fitting 105 are respectively contacted with the front side surface of the metal square rod B102 and the right side surface of the metal square rod C103, and a pair of connecting strip holes of the fourth connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 on the front side surface of the metal square rod B102 and the strip-shaped sliding groove 108 on the right side surface of the metal square rod C103; a pair of outer side surfaces of the fifth connecting corner fitting 105 are respectively contacted with the upper side surface of the metal square rod C103 and the front side surface of the metal square rod D104, and a pair of connecting strip holes of the fifth connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 on the upper side surface of the metal square rod C103 and the strip-shaped sliding groove 108 on the front side surface of the metal square rod D104; a pair of outer side surfaces of the sixth connecting corner fitting 105 are respectively contacted with the upper side surface of the metal square rod C103 and the rear side surface of the metal square rod D104, and a pair of connecting strip holes of the sixth connecting corner fitting 105 are respectively corresponding to the strip-shaped sliding groove 108 on the upper side surface of the metal square rod C103 and the strip-shaped sliding groove 108 on the rear side surface of the metal square rod D104;
the heads of the first counter screw A106 are respectively and slidably embedded in the groove cavities of the strip-shaped chute 108 on the rear side surface of the metal square rod A101 and the strip-shaped chute 108 on the left side surface of the metal square rod C103, and the first counter screw A106 respectively penetrates through a pair of connecting strip holes of the first connecting corner piece 105; the heads of the second counter screw A106 are respectively and slidably embedded in the groove cavities of the strip-shaped chute 108 on the rear side surface of the metal square rod A101 and the strip-shaped chute 108 on the right side surface of the metal square rod C103, and the second counter screw A106 respectively penetrates through a pair of connecting strip holes of the second connecting corner piece 105; the heads of the third counter screw A106 are respectively and slidably embedded in the groove cavities of the strip-shaped chute 108 on the front side surface of the metal square rod B102 and the strip-shaped chute 108 on the left side surface of the metal square rod C103, and the third counter screw A106 respectively penetrates through a pair of connecting strip holes of the third connecting corner piece 105; the heads of the fourth counter screw A106 are respectively and slidably embedded in the groove cavities of the strip-shaped chute 108 on the front side surface of the metal square rod B102 and the strip-shaped chute 108 on the right side surface of the metal square rod C103, and the fourth counter screw A106 respectively penetrates through a pair of connecting strip holes of the fourth connecting corner piece 105; the heads of the fifth counter screw A106 are respectively and slidably embedded in the groove cavities of the strip-shaped chute 108 on the upper side surface of the metal square rod C103 and the strip-shaped chute 108 on the front side surface of the metal square rod D104, and the fifth counter screw A106 respectively penetrates through a pair of connecting strip holes of the fifth connecting corner piece 105; the head of the sixth counter screw A106 is respectively and slidably embedded in the groove cavity of the strip-shaped chute 108 on the upper side surface of the metal square rod C103 and the strip-shaped chute 108 on the rear side surface of the metal square rod D104, and the sixth counter screw A106 respectively penetrates through a pair of connecting strip holes of the sixth connecting corner piece 105; six pairs of compression nuts A107 are correspondingly screwed on the tail ends of the six pairs of head bolts A106 one by one;
the prestress adjusting mechanism comprises a clamping seat A201, two square head bolts B202, two compression nuts B203, an adjusting seat 204, four fastening bolts A205, an adjusting slide block 206, two bearings 207, an adjusting screw 208, an adjusting knob 209, two guide rods 210, a clamping seat B211 and two fastening bolts B212;
the clamping seat A201 comprises a runway-shaped longitudinal vertical plate, a rectangular longitudinal vertical plate extending to the front end surface of the runway-shaped longitudinal vertical plate, and two protruding blocks extending to the right side surface of the rectangular longitudinal vertical plate and arranged up and down; the left side surface of the runway-shaped longitudinal vertical plate is contacted with the right side surface of the metal square rod D104; two assembly holes A213 which are arranged up and down and four assembly holes B214 which are arranged in a rectangular shape are arranged between the left side surface and the right side surface of the runway-shaped longitudinal vertical plate in a penetrating way; the two assembly holes A213 correspond to the strip-shaped chute 108 on the right side surface of the metal square rod D104; a clamping groove A215 is formed between the front side surface and the rear side surface of each lug in a penetrating way, and the notch of the two clamping grooves A215 are opposite to each other vertically;
the heads of the two square head bolts B202 are slidably embedded in the groove cavity of the strip-shaped chute 108 on the right side surface of the metal square rod D104, and the two square head bolts B202 respectively penetrate through the two assembly holes A213; the two compression nuts B203 are respectively screwed at the tail ends of the two square head bolts B202;
the adjusting seat 204 comprises a square longitudinal vertical plate and two convex ribs which are arranged on the right side surface of the square longitudinal vertical plate in an extending way and are arranged front and back; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the runway-shaped longitudinal vertical plate of the clamping seat A201; two screw holes A216 which are vertically arranged are respectively arranged between the right side surface of each convex rib and the left side surface of the square longitudinal vertical plate in a penetrating way, and the four screw holes A216 are opposite to the four assembly holes B214 one by one; a supporting hole 217 is formed between the middle part of the front side surface and the middle part of the rear side surface of each rib in a penetrating way, and the two supporting holes 217 are opposite to each other in front and back; the back side surface of the first rib and the front side surface of the second rib are respectively provided with two supporting grooves which are arranged up and down;
the four fastening bolts A205 penetrate through the four assembly holes B214 in a one-to-one correspondence manner, and the tail ends of the four fastening bolts A205 are screwed into the four screw holes A216 in a one-to-one correspondence manner;
the left side surface of the adjusting slide block 206 is contacted with the right side surface of the square longitudinal vertical plate of the adjusting seat 204; two screw holes B218 which are arranged up and down are formed between the left side surface and the right side surface of the adjusting slide block 206 in a penetrating way; screw holes C219 and two guide holes 220 which are arranged up and down are arranged between the front side surface and the rear side surface of the adjusting slide block 206 in a penetrating way;
the adjusting screw 208 penetrates through the screw hole C219, and two ends of the adjusting screw 208 are respectively rotatably supported in the two supporting holes 217 through the two bearings 207;
the adjusting knob 209 is coaxially fixed on the rear end face of the adjusting screw 208;
the two guide rods 210 respectively penetrate through the two guide holes 220; the front ends of the two guide rods 210 are respectively inserted into the two supporting grooves on the first convex edge; the rear ends of the two guide rods 210 are respectively inserted into the two supporting grooves on the second convex edge;
the clamping seat B211 comprises a square longitudinal vertical plate, a rectangular longitudinal vertical plate extending to the front end surface of the square longitudinal vertical plate and a lug extending to the left side surface of the rectangular longitudinal vertical plate; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the adjusting slide block 206; two assembly holes C221 which are vertically arranged are arranged between the left side surface and the right side surface of the square longitudinal vertical plate in a penetrating way, and the two assembly holes C221 are opposite to the two screw holes B218 respectively; a clamping groove B222 with a frontward notch is arranged between the upper side surface and the lower side surface of the lug in a penetrating way, and the upper end and the lower end of the clamping groove B222 respectively correspond to the notches of the two clamping grooves A215;
the two fastening bolts B212 respectively penetrate through the two assembly holes C221, and tail ends of the two fastening bolts B212 are respectively screwed into the two screw holes B218;
the energy conversion mechanism comprises an elastic beam 301, a pair of piezoelectric composite fiber material sheets 302, a square column-shaped blunt body 303 and a connecting seat 305;
the elastic beams 301 are longitudinally arranged; two isolation gaps 304 which are arranged along the length direction and are arranged up and down are arranged between the left side surface and the right side surface of the elastic beam 301 in a penetrating way; the front ends of the two isolation gaps 304 are closed, and the rear ends of the two isolation gaps penetrate through the rear end face of the elastic beam 301; the two isolation slits 304 divide the elastic beam 301 into an upper beam section, a middle beam section, and a lower beam section; the rear ends of the upper beam section and the lower beam section are fixedly embedded in the two clamping grooves A215 respectively; the rear end of the middle beam section is fixedly embedded in the clamping groove B222;
a pair of piezoelectric composite fiber material sheets 302 are adhesively fixed to the left and right sides of the middle beam section of the elastic beam 301, respectively, in bilateral symmetry;
the square column-shaped blunt body 303 is vertically arranged, and the square column-shaped blunt body 303 is fixed at the front end of the elastic beam 301 through the connecting seat 305.
The clamping seat A201 and the clamping seat B211 are both made of polylactic acid.
The adjusting seat 204, the adjusting slide block 206, the bearing 207, the adjusting screw 208, the adjusting knob 209 and the guide rod 210 are all made of steel.
The fastening bolts A205 and the fastening bolts B212 are hexagon socket head cap bolts; the bearing 207 is a ball bearing.
The elastic beam 301 is a steel elastic beam or a copper elastic beam.
The square column-shaped blunt body 303 is made of polylactic acid or polystyrene foam plastic.
The connecting seat 305 comprises a rectangular transverse vertical plate and a convex rib which is arranged on the rear side surface of the rectangular transverse vertical plate in an extending manner and is arranged vertically; the front side surface of the rectangular transverse vertical plate is fixed with the middle part of the rear side surface of the square column-shaped blunt body 303; a connecting groove 306 with a notch facing backwards is arranged between the upper end surface and the lower end surface of the convex rib; the front end of the elastic beam 301 is fixedly embedded in the connecting groove 306.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (7)
1. The utility model provides a prestressing force bistable relaxation energy harvesting device which characterized in that: comprises a fixed support, a prestress adjusting mechanism and an energy conversion mechanism;
the fixed support comprises a metal square rod A (101), a metal square rod B (102), a metal square rod C (103), a metal square rod D (104), six connecting corner pieces (105), six pairs of square head bolts A (106) and six pairs of compression nuts A (107);
the metal square rod A (101) and the metal square rod B (102) are transversely arranged; the metal square rod C (103) is longitudinally arranged; the front end surface of the metal square rod C (103) is contacted with the middle part of the rear side surface of the metal square rod A (101); the rear end surface of the metal square rod C (103) is contacted with the middle part of the front side surface of the metal square rod B (102); the metal square rod D (104) is vertically arranged, and the lower end surface of the metal square rod D (104) is contacted with the middle part of the upper side surface of the metal square rod C (103); four side surfaces of the metal square rod A (101), four side surfaces of the metal square rod B (102), four side surfaces of the metal square rod C (103) and four side surfaces of the metal square rod D (104) are provided with a strip-shaped chute (108) along the length direction; the groove cavity of each strip-shaped chute (108) is an inverted T-shaped groove cavity;
the pair of outer side surfaces of the first connecting corner fitting (105) are respectively contacted with the rear side surface of the metal square rod A (101) and the left side surface of the metal square rod C (103), and the pair of connecting strip holes of the first connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the rear side surface of the metal square rod A (101) and the strip-shaped sliding groove (108) of the left side surface of the metal square rod C (103); the pair of outer side surfaces of the second connecting corner fitting (105) are respectively contacted with the rear side surface of the metal square rod A (101) and the right side surface of the metal square rod C (103), and the pair of connecting strip holes of the second connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the rear side surface of the metal square rod A (101) and the strip-shaped sliding groove (108) of the right side surface of the metal square rod C (103); a pair of outer side surfaces of the third connecting corner fitting (105) are respectively contacted with the front side surface of the metal square rod B (102) and the left side surface of the metal square rod C (103), and a pair of connecting strip holes of the third connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the front side surface of the metal square rod B (102) and the strip-shaped sliding groove (108) of the left side surface of the metal square rod C (103); a pair of outer side surfaces of the fourth connecting corner fitting (105) are respectively contacted with the front side surface of the metal square rod B (102) and the right side surface of the metal square rod C (103), and a pair of connecting strip holes of the fourth connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the front side surface of the metal square rod B (102) and the strip-shaped sliding groove (108) of the right side surface of the metal square rod C (103); a pair of outer side surfaces of the fifth connecting corner fitting (105) are respectively contacted with the upper side surface of the metal square rod C (103) and the front side surface of the metal square rod D (104), and a pair of connecting strip holes of the fifth connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the upper side surface of the metal square rod C (103) and the strip-shaped sliding groove (108) of the front side surface of the metal square rod D (104); a pair of outer side surfaces of the sixth connecting corner fitting (105) are respectively contacted with the upper side surface of the metal square rod C (103) and the rear side surface of the metal square rod D (104), and a pair of connecting strip holes of the sixth connecting corner fitting (105) are respectively corresponding to the strip-shaped sliding groove (108) of the upper side surface of the metal square rod C (103) and the strip-shaped sliding groove (108) of the rear side surface of the metal square rod D (104);
the heads of the first square head bolts A (106) are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove (108) on the rear side surface of the metal square rod A (101) and the strip-shaped sliding groove (108) on the left side surface of the metal square rod C (103), and the first square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the first connecting corner fitting (105); the heads of the second square head bolts A (106) are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove (108) on the rear side surface of the metal square rod A (101) and the strip-shaped sliding groove (108) on the right side surface of the metal square rod C (103), and the second square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the second connecting corner fitting (105); the heads of the third pair of square head bolts A (106) are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove (108) on the front side surface of the metal square rod B (102) and the strip-shaped sliding groove (108) on the left side surface of the metal square rod C (103), and the third pair of square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the third connecting corner piece (105); the heads of the fourth square head bolts A (106) are respectively and slidably embedded in the groove cavities of the strip-shaped sliding groove (108) on the front side surface of the metal square rod B (102) and the strip-shaped sliding groove (108) on the right side surface of the metal square rod C (103), and the fourth square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the fourth connecting corner fitting (105); the heads of the fifth pair of square head bolts A (106) are respectively and slidably embedded in a groove cavity of a strip-shaped chute (108) on the upper side surface of the metal square rod C (103) and a strip-shaped chute (108) on the front side surface of the metal square rod D (104), and the fifth pair of square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the fifth connecting corner fitting (105); the heads of the sixth pair of square head bolts A (106) are respectively and slidably embedded in a groove cavity of a strip-shaped chute (108) on the upper side surface of the metal square rod C (103) and a strip-shaped chute (108) on the rear side surface of the metal square rod D (104), and the sixth pair of square head bolts A (106) respectively penetrate through a pair of connecting strip holes of the sixth connecting corner fitting (105); six pairs of compression nuts A (107) are screwed at the tail ends of the six pairs of square head bolts A (106) in a one-to-one correspondence manner;
the prestress adjusting mechanism comprises a clamping seat A (201), two square bolts B (202), two compression nuts B (203), an adjusting seat (204), four fastening bolts A (205), an adjusting slide block (206), two bearings (207), an adjusting screw (208), an adjusting knob (209), two guide rods (210), a clamping seat B (211) and two fastening bolts B (212);
the clamping seat A (201) comprises a runway-shaped longitudinal vertical plate, a rectangular longitudinal vertical plate which is arranged on the front end surface of the runway-shaped longitudinal vertical plate in an extending mode, and two protruding blocks which are arranged on the right side surface of the rectangular longitudinal vertical plate in an extending mode and are arranged up and down; the left side surface of the runway-shaped longitudinal vertical plate is contacted with the right side surface of the metal square rod D (104); two assembly holes A (213) which are arranged up and down and four assembly holes B (214) which are arranged in a rectangular shape are arranged between the left side surface and the right side surface of the runway-shaped longitudinal vertical plate in a penetrating way; the two assembly holes A (213) are corresponding to the strip-shaped chute (108) on the right side surface of the metal square rod D (104); a clamping groove A (215) is formed between the front side surface and the rear side surface of each lug in a penetrating way, and the notches of the two clamping grooves A (215) are opposite to each other up and down;
the heads of the two square head bolts B (202) are slidably embedded in the groove cavity of the strip-shaped sliding groove (108) on the right side surface of the metal square rod D (104), and the two square head bolts B (202) respectively penetrate through the two assembly holes A (213); the two compression nuts B (203) are respectively screwed at the tail ends of the two square head bolts B (202);
the adjusting seat (204) comprises a square longitudinal vertical plate and two convex edges which are arranged on the right side surface of the square longitudinal vertical plate in an extending way and are arranged front and back; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the runway-shaped longitudinal vertical plate of the clamping seat A (201); two screw holes A (216) which are vertically arranged are arranged between the right side surface of each convex rib and the left side surface of the square longitudinal vertical plate in a penetrating way, and the four screw holes A (216) are opposite to the four assembly holes B (214) one by one; a supporting hole (217) is formed between the middle part of the front side surface and the middle part of the rear side surface of each rib in a penetrating way, and the two supporting holes (217) are opposite to each other front and back; the back side surface of the first rib and the front side surface of the second rib are respectively provided with two supporting grooves which are arranged up and down;
the four fastening bolts A (205) penetrate through the four assembly holes B (214) in a one-to-one correspondence manner, and the tail ends of the four fastening bolts A (205) are screwed in the four screw holes A (216) in a one-to-one correspondence manner;
the left side surface of the adjusting slide block (206) is contacted with the right side surface of the square longitudinal vertical plate of the adjusting seat (204); two screw holes B (218) which are arranged up and down are arranged between the left side surface and the right side surface of the adjusting slide block (206) in a penetrating way; screw holes C (219) and two guide holes (220) which are arranged up and down are arranged between the front side surface and the rear side surface of the adjusting slide block (206) in a penetrating way;
the adjusting screw rod (208) penetrates through the screw hole C (219), and two ends of the adjusting screw rod (208) are respectively rotatably supported in the two supporting holes (217) through two bearings (207);
the adjusting knob (209) is coaxially fixed on the rear end face of the adjusting screw rod (208);
the two guide rods (210) respectively penetrate through the two guide holes (220); the front ends of the two guide rods (210) are respectively inserted into the two supporting grooves on the first convex edge; the rear ends of the two guide rods (210) are respectively inserted into the two supporting grooves on the second convex edge;
the clamping seat B (211) comprises a square longitudinal vertical plate, a rectangular longitudinal vertical plate extending to the front end surface of the square longitudinal vertical plate and a lug extending to the left side surface of the rectangular longitudinal vertical plate; the left side surface of the square longitudinal vertical plate is contacted with the right side surface of the adjusting slide block (206); two assembly holes C (221) which are vertically arranged are arranged between the left side surface and the right side surface of the square longitudinal vertical plate in a penetrating way, and the two assembly holes C (221) are opposite to the two screw holes B (218) respectively; a clamping groove B (222) with a forward notch is arranged between the upper side surface and the lower side surface of the lug in a penetrating way, and the upper end and the lower end of the clamping groove B (222) respectively correspond to the notches of the two clamping grooves A (215);
the two fastening bolts B (212) respectively penetrate through the two assembly holes C (221), and tail ends of the two fastening bolts B (212) are respectively screwed into the two screw holes B (218);
the energy conversion mechanism comprises an elastic beam (301), a pair of piezoelectric composite fiber material sheets (302), a square column-shaped blunt body (303) and a connecting seat (305);
the elastic beam (301) is longitudinally arranged; two isolation gaps (304) which are arranged along the length direction and are arranged up and down are arranged between the left side surface and the right side surface of the elastic beam (301) in a penetrating way; the front ends of the two isolation gaps (304) are closed, and the rear ends of the two isolation gaps penetrate through the rear end face of the elastic beam (301); the elastic beam (301) is divided into an upper beam section, a middle beam section and a lower beam section by two isolation gaps (304); the rear end of the upper beam section and the rear end of the lower beam section are respectively fixedly embedded in the two clamping grooves A (215); the rear end of the middle beam section is fixedly embedded in the clamping groove B (222);
a pair of piezoelectric composite fiber material sheets (302) are respectively adhered and fixed on the left side surface and the right side surface of the middle beam section of the elastic beam (301) in a bilateral symmetry manner;
the square column-shaped blunt body (303) is vertically arranged, and the square column-shaped blunt body (303) is fixed at the front end of the elastic beam (301) through the connecting seat (305).
2. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the clamping seat A (201) and the clamping seat B (211) are both made of polylactic acid.
3. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the adjusting seat (204), the adjusting sliding block (206), the bearing (207), the adjusting screw (208), the adjusting knob (209) and the guide rod (210) are all made of steel.
4. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the fastening bolt A (205) and the fastening bolt B (212) are hexagon socket head cap bolts; the bearing (207) is a ball bearing.
5. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the elastic beam (301) is a steel elastic beam or a copper elastic beam.
6. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the square column-shaped blunt body (303) is made of polylactic acid or polystyrene foam plastic.
7. A pre-stressed bistable relaxation energy harvesting device according to claim 1, wherein: the connecting seat (305) comprises a rectangular transverse vertical plate and a convex rib which is arranged on the rear side surface of the rectangular transverse vertical plate in an extending manner and is arranged vertically; the front side surface of the rectangular transverse vertical plate is fixed with the middle part of the rear side surface of the square column-shaped blunt body (303); a connecting groove (306) with a notch facing backwards is arranged between the upper end face and the lower end face of the convex rib in a penetrating way; the front end of the elastic beam (301) is fixedly embedded in the connecting groove (306).
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| V型双稳态压电发电机建模与输出特性分析;毛新华;何青;褚东亮;;压电与声光(第02期);全文 * |
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