阅读说明：本技术 一种压电阻尼装置 (Piezoelectric damping device ) 是由 谢向东 张劲峰 杜国锋 王子敬 张建坤 黄麟 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种压电阻尼装置,包括外壳、一对端盖、吸能组件和一对传力杆；所述外壳为圆筒状结构且两端同轴设置有所述端盖,所述吸能组件同轴设置于所述外壳的内腔中,每一所述传力杆均垂直贯穿一所述端盖后,与所述吸能组件一端同轴连接；所述吸能组件包括限位杆、一对基座和若干多段弯折梁,所述基座均平行于所述端盖设置,所述限位杆沿轴线方向设置于一对所述基座之间,所述多段弯折梁的两端分别与一对所述基座的边缘处连接,若干所述多段弯折梁均匀环设于所述限位杆周围。本发明装置设置于建筑结构或机械设备上,通过吸能组件使该装置在振动时多段弯折梁上的压电片因发生形变而产生电能,在实现结构减振的同时,能够对振动能回收利用。(The invention discloses a piezoelectric damping device, which comprises a shell, a pair of end covers, an energy absorption assembly and a pair of dowel bars, wherein the end covers are arranged on the shell; the shell is of a cylindrical structure, the end covers are coaxially arranged at two ends of the shell, the energy absorption assembly is coaxially arranged in an inner cavity of the shell, and each dowel bar vertically penetrates through one end cover and is coaxially connected with one end of the energy absorption assembly; the energy-absorbing assembly comprises a limiting rod, a pair of bases and a plurality of multi-section bending beams, the bases are all parallel to the end covers, the limiting rod is arranged between the bases in a pair mode along the axis direction, two ends of the multi-section bending beams are connected with the edges of the bases respectively, and the multi-section bending beams are evenly arranged around the limiting rod in a surrounding mode. The device is arranged on a building structure or mechanical equipment, and the piezoelectric sheets on the multi-section bent beam generate electric energy due to deformation when the device vibrates through the energy absorption component, so that the vibration of the structure is reduced, and the vibration energy can be recycled.)

1. A piezoelectric damping device is characterized by comprising a shell, a pair of end covers, an energy absorption assembly and a pair of dowel bars;

the shell is of a cylindrical structure, the end covers are coaxially arranged at two ends of the shell respectively, the energy absorption assembly is coaxially arranged in an inner cavity of the shell, and each dowel bar is coaxially connected with one end of the energy absorption assembly after vertically penetrating through one end cover;

the energy-absorbing assembly comprises a limiting rod, a pair of bases and a plurality of multi-section bending beams, wherein the bases are all parallel to the end covers, the limiting rod is arranged between the bases in a pair mode along the axis direction, two ends of the multi-section bending beams are connected with the edges of the bases respectively, and the multi-section bending beams are evenly arranged around the limiting rod in a surrounding mode.

2. The piezoelectric damping device according to claim 1, wherein the end cap comprises a cover, a boss, and a slide bearing;

the cover body is of a disc-shaped structure, the boss is vertically arranged at the center of one side, away from the base, of the cover body, a through hole for the dowel bar to penetrate through is formed in the center of the boss, and the sliding bearing is coaxially arranged at the central through hole of the boss.

3. The piezoelectric damping device according to claim 1, wherein each of the dowel bars comprises a tension rod, an annular hinge mount, and a restraining spring;

the annular hinged support is of an annular structure with a central through hole, one end of the pull rod penetrates through the end cover and then is coaxially connected with the base, and the other end of the pull rod is connected with the curved side edge of the annular hinged support;

the restraint spring is sleeved at one end, far away from the annular hinged support, of the pull rod, and the restraint spring is arranged between the end cover and the base.

4. The piezoelectric damping device according to claim 1, wherein the limiting rod comprises a top rod and a pair of limiting springs, the pair of limiting springs are coaxially disposed at two ends of the top rod, and each of the limiting springs is connected to a center of the base at an end away from the top rod.

5. The piezoelectric damping device of claim 4, wherein an inner diameter of the retaining spring is greater than a diameter of the ejector pin.

6. The piezoelectric damping device according to claim 1, wherein the base is a regular polygon sheet structure, a central circular hole for clamping the dowel bar is formed in the center of the base, a plurality of grooves with through holes are uniformly formed in the edge of the base, and each groove is clamped with the end of one multi-section bent beam.

7. The piezoelectric damping device according to claim 6, wherein the multi-segment bending beam comprises a pair of resilient beams, a plurality of piezoelectric coupling beams, a plurality of connection beams, and a plurality of piezoelectric patches;

the pair of rebound beams are oppositely arranged at two ends of the multi-section bending beam in parallel, one end of each rebound beam is vertically connected with the piezoelectric coupling beam, and the other end of each rebound beam is provided with a screw hole and correspondingly clamped with the groove of the base;

a plurality of piezoelectric coupling beams are arranged between the pair of rebound beams along the vertical direction, and the adjacent piezoelectric coupling beams are vertically connected through the connecting beam;

the connecting beam is of a U-shaped structure, and the bending structure of the connecting beam is arranged close to the limiting rod;

the piezoelectric patches are arranged on any one side or two sides of the piezoelectric coupling beam and are electrically connected with external leads.

8. The piezoelectric damping device according to claim 7, wherein the resilient beam, the piezoelectric coupling beam, the connecting beam and the piezoelectric sheet are all sheet-like structures having equal widths.

Technical Field

The invention relates to the technical field of vibration power generation, in particular to a piezoelectric damping device.

Background

At present, buildings, automobiles, airplanes, large-scale mechanical equipment and the like can vibrate in the working process, and in order to reduce the harm caused by vibration, people design damping devices to reduce vibration, but most of the damping devices adopted at present adopt friction energy to offset vibration energy, and cannot convert the vibration into usable energy. It is therefore desirable to provide a new piezoelectric damping device for solving the above problems.

Disclosure of Invention

The invention aims to provide a piezoelectric damping device, which is used for solving the problem that no equipment for effectively recovering vibration energy exists in the prior art.

In order to solve the technical problem, the invention provides a piezoelectric damping device which comprises a shell, a pair of end covers, an energy absorption assembly and a pair of dowel bars; the shell is of a cylindrical structure, two ends of the shell are respectively and coaxially provided with an end cover, the energy absorption assembly is coaxially arranged in an inner cavity of the shell, and each dowel bar is coaxially connected with one end of the energy absorption assembly after vertically penetrating through one end cover; the energy-absorbing assembly comprises a limiting rod, a pair of bases and a plurality of multi-section bending beams, the bases are all parallel to the end covers, the limiting rod is arranged between the pair of bases along the axis direction, the two ends of the multi-section bending beams are respectively connected with the edges of the pair of bases, and the multi-section bending beams are evenly and annularly arranged around the limiting rod.

The end cover comprises a cover body, a boss and a sliding bearing; the lid is discoid structure, and the boss sets up perpendicularly in the lid and keeps away from the center department of base one side, and boss central authorities have the through-hole that supplies the dowel steel to run through, and the slide bearing sets up in the central through-hole department of boss coaxially.

Each dowel bar comprises a pull rod, an annular hinged support and a restraining spring; the annular hinged support is of an annular structure with a central through hole, one end of the pull rod penetrates through the end cover and then is coaxially connected with the base, and the other end of the pull rod is connected with the curved side edge of the annular hinged support; the restraint spring is sleeved at one end, far away from the annular hinged support, of the pull rod, and the restraint spring is arranged between the end cover and the base.

The limiting rod comprises a top rod and a pair of limiting springs, the limiting springs are coaxially arranged at two ends of the top rod respectively, and each limiting spring is far away from one end of the top rod and is connected with the center of a base.

Preferably, the inner diameter of the limit spring is larger than the diameter of the ejector rod.

Wherein, the base is regular polygon sheet structure, and the base center is equipped with the central round hole of joint dowel steel, and base edge evenly is provided with a plurality of recesses that have the through-hole, and each recess is buckled the tip joint of roof beam with a multistage.

The multi-section bending beam comprises a pair of rebound beams, a plurality of piezoelectric coupling beams, a plurality of connecting beams and a plurality of piezoelectric sheets; the pair of rebounding beams are oppositely arranged at two ends of the multi-section bending beam in parallel, one end of each rebounding beam is vertically connected with the piezoelectric coupling beam, and the other end of each rebounding beam is provided with a screw hole and correspondingly clamped with the groove of the base; a plurality of piezoelectric coupling beams are arranged between the pair of rebound beams along the vertical direction, and the adjacent piezoelectric coupling beams are vertically connected through connecting beams; the connecting beam is of a U-shaped structure, and the bending structure of the connecting beam is arranged close to the limiting rod; the piezoelectric patches are arranged on any one side or two sides of the piezoelectric coupling beam and are electrically connected with the external lead.

Preferably, the rebound beam, the piezoelectric coupling beam, the connecting beam and the piezoelectric sheet are all sheet structures with equal width.

The invention has the beneficial effects that: the piezoelectric damping device is arranged on a building structure or mechanical equipment, and the piezoelectric sheets on the multi-section bent beam generate electric energy due to deformation when the device vibrates through an energy absorption assembly in the piezoelectric damping device, so that the mechanical energy wasted by mechanical vibration can be well converted into the electric energy while the structural vibration reduction is realized, and the recycling of the vibration energy is realized.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of a piezoelectric damping device according to the present invention;

FIG. 2 is a schematic structural view of an end cap in an embodiment of the piezoelectric damping device of the present invention;

FIG. 3 is a schematic structural view of a multi-segment bending beam according to an embodiment of the piezoelectric damping device of the present invention;

FIG. 4 is a schematic structural diagram of a limiting rod in an embodiment of the piezoelectric damping device of the present invention;

FIG. 5 is a schematic structural diagram of a base in one embodiment of a piezoelectric damping device according to the present invention;

in the figure: 1: a housing; 2: an end cap; 21: a cover body; 22: a boss; 23: a sliding bearing; 3: an energy absorbing assembly; 31: a limiting rod; 311: a top rod; 312: a limiting spring; 32: a base; 321: a central circular hole; 322: a groove; 33: a multi-section bent beam; 331: a resilient beam; 332: a piezoelectric coupling beam; 333: a connecting beam; 334: a piezoelectric sheet; 4: a dowel bar; 41: a pull rod; 42: an annular hinged support; 43: the spring is constrained.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a piezoelectric damping device according to the present invention, which includes a housing 1, a pair of end caps 2, an energy absorbing assembly 3, and a pair of force transmission rods 4; the shell 1 is of a cylindrical structure, two ends of the shell are respectively and coaxially provided with an end cover 2, the energy absorption assembly 3 is coaxially arranged in an inner cavity of the shell 1, each dowel bar 4 vertically penetrates through one end cover 2 and then is coaxially connected with one end of the energy absorption assembly 3, and preferably, the outer diameter of the energy absorption assembly 3 is smaller than the inner diameter of the shell 1 so as to be convenient for assembly; energy-absorbing component 3 includes gag lever post 31, a pair of base 32 and a plurality of multistage roof beam 33 of buckling, and base 32 all is on a parallel with the end cover setting, and gag lever post 31 sets up between a pair of base 32 along the axis direction, and the both ends of the multistage roof beam 33 of buckling are connected with the edge of a pair of base 32 respectively, and base 32 and multistage are buckled and are being the vertical relation between the roof beam 33, and a plurality of multistage roof beams 33 of buckling evenly encircle locate around gag lever post 32. The invention can transmit the mechanical vibration to the energy-absorbing component 3 through the pair of dowel bars 4 and convert the vibration energy at the multi-section bent beam 33 of the energy-absorbing component 3, thereby realizing the recycling of the vibration energy. The respective components of the piezoelectric damping device according to the present invention will be described in detail below.

Specifically, in the present embodiment, as shown in fig. 2, the end cap 2 includes a lid body 21, a boss 22, and a slide bearing 23; the cover body 21 is a disc-shaped structure, the boss 22 is vertically arranged at the center of one side of the cover body 21, which is far away from the base, the center of the boss is provided with a through hole for the force transmission rod to penetrate through, and the sliding bearing is coaxially arranged at the central through hole of the boss.

Specifically, in the present embodiment, each dowel 4 includes a tension rod 41, an annular hinge seat 42, and a restraining spring 43; the annular hinged support 42 is of an annular structure with a central through hole, one end of the pull rod 41 penetrates through the sliding bearing 23 of the end cover 2 and then is coaxially connected with the base 32, the other end of the pull rod 41 is connected with the curved side edge of the annular hinged support 42, and the annular hinged support 42 positioned at the two ends of the piezoelectric damping device can be hinged in equipment generating vibration energy so as to ensure the normal work of the piezoelectric damping device; restraint spring 43 is located the one end that pull rod 41 kept away from annular free bearing 42 in the cover, and each restraint spring 43 sets up between lid 21 and base 32, and restraint spring 43 all can follow pull rod 41 and compress or extend the motion, and the distance that base 32 can limit the skew to the device both ends in the vibration process is set up here to restraint spring 43, and then can avoid appearing great deformation and make the problem that multistage bending beam 33 damaged.

Specifically, for the energy absorbing assembly in the present embodiment, the limiting rod 31 includes a top rod 311 and a pair of limiting springs 312, the pair of limiting springs 312 are respectively coaxially disposed at two ends of the top rod 311, and one end of each limiting spring 312, which is far away from the top rod 311, is connected to the center of one base 32, so that the limiting rod 31 is disposed between two parallel bases 32; the inner diameter of the preferable limiting spring 312 is larger than the diameter of the ejector rod 311, so that the limiting spring 312 can perform good compression or extension movement, certain damping is increased, a part of vibration energy is properly dissipated, the deformation interval is effectively restrained, and large deformation is avoided. The base 32 is preferably a regular polygon sheet structure, and the center of the base 32 is provided with a central circular hole 321 for clamping the pull rod 41 in the dowel bar 4, so that one end of the pull rod 41 far away from the annular hinged support 42 is fixedly connected with the base 32; base 32 edge evenly is provided with a plurality of recesses 322 that have the through-hole, and each recess 322 and the corresponding joint of tip of a multistage roof beam 33 of buckling, and the through-hole in the recess 322 is passed to coupling assembling such as accessible screw after the joint, buckles roof beam 33 vertical fixation with the multistage between two parallel bases 32 to can transmit the skew motion of two parallel bases 32 for the multistage roof beam 33 of buckling, make the multistage roof beam 33 of buckling produce deformation. Here, the shape of the base 32 may be other sheet-like structures with circular isocenter symmetry, which is not limited herein; meanwhile, the number of the grooves 322 at the edge of the base 32 can be set according to actual requirements, and is not limited again.

Specifically, the multi-section bending beam 33 includes a pair of resilient beams 331, a plurality of piezoelectric coupling beams 332, a plurality of connecting beams 333, and a plurality of piezoelectric sheets 334; the pair of resilient beams 331 are oppositely arranged at two ends of the multi-section bent beam 33 in parallel, the resilient beams 331 are both parallel to the base 32, one end of the resilient beam 331 is vertically connected with the piezoelectric coupling beam 332, and the other end of the resilient beam 331 is provided with a screw hole and correspondingly clamped with the groove 322 on the base 32; a plurality of strip-shaped piezoelectric coupling beams 332 are arranged between the pair of rebound beams 331 along the vertical direction, and the adjacent piezoelectric coupling beams 332 are vertically connected through a connecting beam 333; the connecting beam 333 is of a U-shaped structure, and the bending structure of the connecting beam 333 is arranged close to the limiting rod 31, so that the U-shaped structure is beneficial to the overall uniform deformation of the multi-section bending beam 33; preferably, the ceramic piezoelectric plate is used as the piezoelectric plate 334, the piezoelectric plate 334 is disposed on any one side or two sides of the piezoelectric coupling beam 332, and the piezoelectric plate 334 is electrically connected to an external lead, after the offset motion of the base 32 is transmitted to the multi-section bending beam 33, the multi-section bending beam 33 deforms, at this time, the piezoelectric plate 32 in the multi-section bending beam 33 generates charges due to the deformation, the piezoelectric plate 32 is connected to the piezoelectric plate 32 through the lead to lead out and store electric energy, and the process of converting mechanical vibration energy into electric energy can be realized. In this embodiment, the resilient beam 331, the piezoelectric coupling beam 332, the connecting beam 333, and the piezoelectric sheet 334 are preferably all sheet structures with equal widths, so that the uniformity of stress of each part when deformation occurs can be ensured, and uniform installation and configuration of components are facilitated; the number of the multi-section bent beams 33 is adapted to the number of the grooves 322 on the base 32, and the number of the multi-section bent beams is closely related to the overall damping of the energy-absorbing assembly 3, and the number of the multi-section bent beams 33 and the number of the grooves can be adaptively adjusted according to specific actual requirements, so that the adaptive adjustment of the overall damping of the energy-absorbing assembly 3 is realized, and the specific number is not limited herein.

Further, based on the structural description of the piezoelectric damping device, the operation mode thereof will be described in detail. The piezoelectric damping device is integrally arranged in equipment for generating vibration energy through annular hinged supports 42 positioned at two ends, wherein an energy absorption component 3 is coaxially arranged in a cavity formed by fixedly surrounding a shell 1 and an end cover 2; when the device wholly receives the vibration, the vibration energy is transmitted to the limiting rod 31 and the two bases 32 in the energy absorption assembly 3 through the pull rod 41, so that the displacement motion occurs along the axis direction, and then the vibration energy is transmitted to the multi-section bending beam 33, so that the multi-section bending beam 33 is deformed, at the moment, the piezoelectric plate 334 in the multi-section bending beam 33 is deformed along with the piezoelectric coupling beam 332, the piezoelectric effect of the piezoelectric plate 334 is utilized, the vibration energy is converted into electric energy, and the electric energy is led out and stored through a wire, thereby simultaneously realizing the effects of damping and recycling the vibration energy. In the above working process, the limit spring 312 is further arranged at the axis of the energy-absorbing assembly 3, and the constraint spring 43 is arranged between the base 32 and the end cover 2, so that the displacement degree of the energy-absorbing assembly 3 along the axis direction is constrained, the problem of damage to the multi-section bent beam 33 due to large deformation can be effectively solved, and the long-time normal work of the device is ensured.

In addition, in this embodiment, the base 32 is set to be a regular hexagon plate-shaped structure, each edge is uniformly provided with one groove 322, the groove 322 is correspondingly clamped with the end of six multi-segment bending beams 33, and the groove is locked and fixed through screws, which is only one arrangement mode of the base 32 and the multi-segment bending beams 33 in the energy absorption assembly 3, and in actual requirements, when the device is installed in different devices, the required damping is often different, and the device can be applied in different scenes by adaptively adjusting parameters such as the number of the grooves 322 of the base 32, the number of the multi-segment bending beams 33, the number of the piezoelectric coupling beams 332, the width of the multi-segment bending beams 33, the vertical distance between the multi-segment bending beams 33 and the limiting rods 31, and the setting of specific parameters needs to be set according to actual conditions, and is not limited herein; in the present embodiment, the piezoelectric damping device is integrally fixed to other devices generating vibration energy by using the annular hinge seat 42, which is only one of the connection manners, and in other embodiments, other connection manners such as welding and the like may be used according to actual requirements, which are not illustrated herein, and it should be noted that these connection manners are all simple modifications made based on the solution of the present invention, and thus still fall within the protection scope of the present invention.

The piezoelectric damping device is arranged on a building structure or mechanical equipment, and the piezoelectric sheets on the multi-section bent beam generate electric energy due to deformation when the device vibrates through an energy absorption assembly in the piezoelectric damping device, so that the mechanical energy wasted by mechanical vibration can be well converted into the electric energy while the structural vibration reduction is realized, and the recycling of the vibration energy is realized.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.