CN211174488U

CN211174488U - Liquid energy collecting device

Info

Publication number: CN211174488U
Application number: CN201921608670.6U
Authority: CN
Inventors: 包斌; 陈文�; 王泉
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology; Southern University of Science and Technology
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-08-04
Anticipated expiration: 2029-09-24

Abstract

A liquid energy harvesting device comprising a mount (1); the liquid storage part (2) is installed on the installation part (1), the connecting shaft (22) is fixedly arranged on the liquid storage part (2), the rotating part (23) is sleeved on the connecting shaft (22), when the liquid stored in the liquid storage part (2) reaches a preset weight, the liquid storage part overturns by taking the axis of the connecting shaft (22) as the center and discharges the liquid, and when the liquid storage part (2) overturns, the rotating part (23) rotates by taking the axis of the connecting shaft (22) as the center; a second piezoelectric element (41) is arranged on the second vibration part (4), and the second vibration part (4) is installed on the installation part (1); when the liquid storage part (2) is turned over, the rotating part (23) intermittently drives the second vibrating part (4) to vibrate. The utility model discloses a liquid energy collection system, the energy of its collection is great to energy conversion efficiency is high.

Description

Liquid energy collecting device

Technical Field

The utility model relates to an energy acquisition technical field especially relates to liquid energy collection system.

Background

Wireless sensor networks and various low-power electronic products have been widely used in various technical fields, but the development of technologies for supplying power to the wireless sensors and the low-power electronic products is relatively delayed, so that some low-power products are limited in practical application. For wireless sensor networks and low-power consumption electronic products which are rapidly developed at present, in order to meet the requirements of lasting and reliable self-power supply of each sensing node, an energy collection technology has become one of the leading-edge technologies. The energy collection technology can collect solar energy, heat energy, vibration energy, wind energy, rainwater energy, tidal energy and the like in the natural environment through the transduction material and convert the solar energy, the heat energy, the vibration energy, the wind energy, the rainwater energy, the tidal energy and the like into electric energy, so that the electric energy can be provided for the low-power-consumption electronic product without an external power supply.

However, in the existing device for collecting energy such as rainwater energy and tidal energy, the technical problems of small energy and low conversion efficiency generally exist, for example, in the existing device for collecting rainwater energy, the raindrops fall to impact the piezoelectric blades to cause bending vibration of the piezoelectric blades, electric energy is generated and then is transmitted to the control energy storage component through the conducting wire, and the electric energy is stored in the control energy storage component. The energy of the raindrops hitting the piezoelectric blades is very small, and therefore, the conversion efficiency of the energy is also affected. Moreover, the size of the rain also affects the stability of energy collection.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem that the energy of the collection that current device of gathering liquid exists is little, energy conversion efficiency is low, provided a liquid energy collection system.

A fluid energy harvesting device comprising a mount; the liquid storage part is mounted on the mounting part, a connecting shaft is fixedly arranged on the liquid storage part, a rotating part is sleeved on the connecting shaft, when the liquid stored in the liquid storage part reaches a preset weight, the liquid storage part overturns by taking the axis of the connecting shaft as a center and discharges the liquid, and when the liquid storage part overturns, the rotating part rotates by taking the axis of the connecting shaft as a center; a second vibrating portion on which a second piezoelectric element is provided, the second vibrating portion being mounted on the mount; when the liquid storage part overturns, the rotating part intermittently drives the second vibrating part to vibrate.

Preferably, the second vibrating portion includes a second vibrating member, one end of the second vibrating member is mounted on the mounting member, the other end of the second vibrating member is cantilever-shaped, and the second piezoelectric element is disposed on a cantilever end of the second vibrating member.

Preferably, the rotating portion is provided with at least one first magnet, and the second vibrator is provided with a second magnet that repels the first magnet.

Further preferably, the first magnet includes a plurality of magnets distributed along an outer circumference of the rotating portion.

Further preferably, the first magnets are uniformly distributed along an outer periphery of the rotating portion.

Further preferably, the rotating portion includes a rotating member that is fitted around the coupling shaft, the rotating member has a plurality of receiving holes formed along an outer periphery thereof, and the plurality of first magnets are respectively fitted into the receiving holes.

Still further preferably, the rotary member has a disk shape.

Still further preferably, the rotary member has a gear shape, and the plurality of receiving holes are respectively provided on a tooth surface of the rotary member.

Preferably, the rotating portion includes a cam member that is fitted around the coupling shaft, and the cam member intermittently strikes the second vibrating member when the liquid storage portion is turned upside down.

The utility model discloses a liquid energy collection system, owing to set up stock solution portion and second vibration portion, when the liquid that stock solution portion stored increases gradually and reaches and predetermine weight, upset and discharge liquid drive the rotating part during the stock solution portion upset and drive second vibration portion intermittently, second piezoelectric element turns into these vibration mechanical energy electric energy. The device collects the liquid energy, the collected energy is large, and the energy conversion efficiency is high.

Drawings

Fig. 1(a) is a schematic perspective view of the basic structure of the liquid energy collecting device of the present invention;

FIG. 1(b) is a schematic plan view showing the basic structure of the liquid energy collecting apparatus of the present invention

FIG. 2 is a schematic perspective view of an embodiment of a fluid energy harvesting device from a top view;

fig. 3 is a schematic bottom perspective view of the embodiment of the fluid energy harvesting device of fig. 2.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the present invention can be implemented in many different ways, and is not limited to the embodiments described herein, but rather, these embodiments are provided to enable those skilled in the art to understand the disclosure more thoroughly.

Fig. 1(a) and 1(b) show the basic structure of a liquid energy collecting device, and referring to fig. 1(a) and 1(b), the liquid energy collecting device includes a base 51, the base 51 is used for installing the whole liquid energy collecting device beside a wireless sensor network (not shown), various low-power electronic products (not shown), an energy conversion component (not shown) is arranged on the base 51, the energy conversion component is used for converting mechanical energy into electric energy so as to provide power for the sensors, and the like, the energy conversion component includes known components, such as an energy collecting circuit, a signal conditioning circuit, and the like, wherein the energy collecting circuit is electrically connected with various piezoelectric elements, such as a d31 mode piezoelectric element, such as a piezoelectric ceramic plate, and by the piezoelectric effect (the piezoelectric effect refers to some materials, such as natural crystal materials, such as quartz, Potassium sodium tartrate or engineering materials such as lithium niobate and lead zirconate titanate (PZT) and the like, wherein the generated electric polarization strength is changed under the action of mechanical stress), mechanical energy can be converted into alternating current electric energy to be output, the alternating current electric energy collected by the piezoelectric element can be converted into direct current after passing through the energy collecting circuit and the signal conditioning circuit, and when a plurality of piezoelectric elements exist, the direct current electric energy can be connected in parallel to charge a capacitor.

The base 51 is provided with the mounting piece 1, the liquid storage part 2 and the plurality of vibration parts 300 are mounted on the mounting piece 1, the piezoelectric elements 400 are respectively arranged on the vibration parts 300, when the liquid storage part 2 discharges liquid and turns over, the liquid storage part 2 drives the vibration parts 300 to vibrate, and the piezoelectric elements 400 on the vibration parts 400 respectively collect the vibration of the corresponding vibration parts 400 and convert mechanical energy into alternating current for output.

The liquid storage part 2 includes a liquid storage container 21, and the liquid storage container 21 may be a container having a regular shape, such as a container having a cylindrical cup shape, a container having a square cup shape, a container having a tapered shape in which the cross-sectional area gradually decreases from the opening portion toward the bottom portion, or the like, but the liquid storage container 21 may also be a container having an irregular shape. For the convenience of mounting and adjusting the liquid storage container 21, a liquid storage container having a regular shape is preferable.

The liquid storage part 2 is fixedly provided with a coupling shaft 22, specifically, the coupling shaft 22 can be fixed on the liquid storage container 21 by means of bonding, welding, screw coupling, and the like, preferably, the coupling shaft 22 includes two shafts which are respectively located at two opposite sides of the liquid storage part 2, and a connection line of the shaft centers of the two coupling shafts 22 can be orthogonal to the shaft center of the liquid storage container 21. The liquid storage part 2 can turn over by taking the axis of the connecting shaft 22 as the center, and the liquid storage part 2 can be directly hinged with the mounting part 1 through the connecting shaft 22 and turn over relative to the mounting part 1; it can also be hinged to other parts, turned upside down with respect to the same, by means of the coupling shaft 22.

The liquid storage portion 2 turns over and discharges the liquid when the liquid stored therein reaches a preset weight, which is a critical weight when the liquid in the liquid storage container 21 can turn over the liquid storage container 21, and the weight is determined according to the center of gravity of the liquid storage container 21 and the position of the coupling shaft 22, and can be obtained through software simulation or actual test.

The coupling shaft 22 of the liquid storage container 21 is disposed at a position that is offset from the center of gravity ZX of the liquid storage container 21 when empty, and ensures that the opening of the liquid storage container 21 is directed upward when empty. Empty means that there is no liquid or only a small amount of liquid remaining inside the reservoir 21, which is not removed. As the liquid in the liquid storage container 21 increases, the center of gravity of the liquid storage container 21 gradually rises and is higher than the coupling shaft 22 of the liquid storage container 21. At this time, the liquid storage container 21 is in an unstable state, and as the liquid in the liquid storage container 21 further increases, when the entire liquid storage container 21 reaches a critical weight, the liquid storage container 21 is tilted to discharge the liquid, and the liquid storage container 21 is turned over around the coupling shaft 22, and due to inertia, the liquid storage container is turned over several turns and then returns to a state in which the opening faces upward. When stock solution container 21 overturns, can produce mechanical energy, the utility model discloses a purpose just lies in concentrating through stock solution container 21 and stores liquid and with liquid discharge, increases the mechanical energy that liquid energy collection system single produced from this (stock solution container 21 overturns produced mechanical energy promptly), the collection efficiency of improvement energy.

Since the center of gravity of the liquid storage container 21 at the time of idling changes with the change in the shape of the container, it is difficult to obtain it by calculation. In order to adjust the center of gravity of the liquid storage container 21, a first mass block 23 is disposed on the liquid storage container 21. The first mass 23 may be disposed at any position of the liquid reservoir 21, preferably, the first mass 23 is disposed below the coupling shaft 22, such as on a sidewall of the liquid reservoir 21 below the coupling shaft 22, and further preferably, the first mass 23 may be disposed at the bottom of the liquid reservoir 21. Through setting up first quality piece 23, not only can adjust the focus of liquid storage container 21, can adjust the slope of the axle center of liquid storage container 21 relative to vertical direction moreover, for example when first quality piece 23 is located one side of the bottom of liquid storage container 21, the axle center of liquid storage container 21 inclines relative to vertical direction, and this is favorable to liquid storage container 21 to overturn after the liquid that its storage reaches the critical value.

To facilitate adjustment of the center of gravity of the reservoir 21, the position of the first mass 23 may be adjusted. If can inlay the thin slice that the one deck can be adsorbed by magnet in the bottom of liquid storage container 21, like iron sheet etc. first quality piece 23 is the magnet to direct absorption is in the bottom of liquid storage container 21, when the position that needs to change first quality piece 23, can readjust the position of magnet. Of course, the first mass 23 may also be made of other materials such as polyurethane, nylon, POM, etc. and is attached to the bottom of the liquid storage container 21 by gluing.

Next, an example in which the vibration unit 300 is driven to vibrate by the liquid reservoir 2 will be described.

Fig. 2 and 3 show an embodiment of the liquid energy collecting device, and referring to fig. 2 and 3, the mounting member 1 is provided with a second vibrating portion 4. The second vibrating portion 4 includes a second vibrating member 42, one end 421 of the second vibrating member 42 is mounted on the mounting member 1, and the other end 422 of the second vibrating member 42 is a cantilever end. The second piezoelectric element 41 is provided on the second vibrating member 42. The second vibrating member 42 is preferably made of a rigid material such as an elongated stainless steel plate and is configured to vibrate in a bending manner, but it is needless to say that an elastic member such as a round bar of a rubber material may be used for the second vibrating member 42 depending on the application. The second piezoelectric element 41 is mounted at the cantilever end of the second vibrating member 42. The second vibration element 42 may be bent by a sheet metal to form a zigzag shape, one end 421 of the second vibration element 42 in the zigzag shape is mounted on the mounting member 1 by a known method such as screwing, gluing, etc., the other end 422 of the second vibration element 42 in the zigzag shape is a cantilever end, and the cantilever end 422 of the second vibration element 42 in the zigzag shape is higher than the mounting end 421, so that there is a sufficient distance between the cantilever end 422 and a rotating portion 23 described below to facilitate the vibration of the cantilever end 422. Further, a rib 424 is welded to an intermediate portion 423 connecting the mounting end 421 and the cantilever end 422 in the zigzag shape. To prevent the cantilever end 422 from vibrating, the intermediate portion 423 vibrates along therewith, thereby preventing the vibration energy of the cantilever end 422 from being diffused.

The rotating portion 23 is fitted around the coupling shaft 22 of the liquid reservoir portion 2, and when the liquid reservoir portion 2 is turned over, the rotating portion 23 rotates about the axis of the coupling shaft 22. When the liquid storage portion 2 is reversed, the rotating portion 23 intermittently drives the second vibrating portion 4 to vibrate. The coupling shaft 22 comprises two positions which are respectively positioned at two sides of the liquid storage part 2 in the radial direction, the two positions of the coupling shaft 22 are coaxial, and preferably, the axes of the two positions of the coupling shaft 22 penetrate through the axis of the liquid storage part 2. Preferably, the rotation portion 23 includes two portions, one of the rotation portions 23 is fitted around one of the coupling shafts 22, and the other of the rotation portions 23 is fitted around the other coupling shaft 22. The rotating part 23 may be clamped by a circlip to avoid axial sliding of the rotating part 23 along the coupling shaft. The rotating portion 23 may drive the second vibrating portion 4 to vibrate in contact with the second vibrating portion 4; the second vibrating portion 4 may be driven to vibrate without contacting the second vibrating portion 4.

As one mode of driving the second vibrator 4 in a non-contact manner, at least one first magnet 232 may be provided on the rotating portion 23, while the second vibrator 42 may be provided with a second magnet 43 that repels the first magnet 232. The second vibrator 42 may be disposed at any position on the outer circumference of the rotating portion 23 as long as the first magnet 232 and the second magnet 43 can still repel each other. Preferably, the rotating part 23 includes a rotating member 231 having a disk shape or a gear shape, in order to reduce the weight of the rotating member 231, the material of the rotating member 231 may be selected from lightweight materials such as POM, aluminum alloy, PC plate, etc., the rotating member 231 is fitted over the coupling shaft 22, the first magnet 232 is disposed on the outer circumference of the rotating member 231, and the first magnet 232 may be bonded to the outer circumference of the rotating member 231. In order to further secure the first magnet 232, the rotary member 231 may have an accommodation hole 233 formed in an outer periphery thereof for accommodating the first magnet 232, and the first magnet 232 may be fitted into the accommodation hole 233 by interference fit. In addition, when the rotary member 231 is provided in a gear shape, the receiving holes 233 are opened to the circumferential tooth surfaces of the rotary member 231.

The second vibrator 42 is disposed above the rotating portion 23, the second magnet 43 may be adhered to the distal end portion 42a of the second vibrator 42, the first magnet 232 may be positioned below the second magnet 43 when the rotating portion 23 rotates, and the first magnet 232 and the second magnet 43 repel each other, so that the second vibrator 42 may be driven to vibrate whenever the first magnet 232 rotates below the second magnet 43.

More preferably, the first magnet 232 includes a plurality of magnets distributed along the outer circumference of the rotating portion 23. Preferably, the first magnets 232 may be uniformly distributed along the outer circumference of the rotating portion 23, such as at an angular interval of 15 °, 30 °, 45 ° along the circumferential direction of the rotating portion 32. Similarly, the rotary member 231 may have a plurality of receiving holes 233 formed along the circumferential direction, and the first magnets 232 may be fitted into the respective receiving holes 233. This can increase the frequency at which the second vibrator 42 is driven, while maintaining the intermittent driving of the second vibrator 42.

As a way of driving the second vibration part 4 in contact, the rotation part 23 may include a cam member (not shown) fitted around the coupling shaft 22, and when the liquid storage part 2 is turned upside down, the cam member rotates around the axis of the coupling shaft 22 and intermittently strikes the second vibration part 42. The cam member may be a cam member having a track of a cam on the outer periphery, and is embedded on the coupling shaft 22 coaxially with the coupling shaft 22; or may be a disk member embedded on the coupling shaft 22 coaxially with the coupling shaft 22.

The various features described in the foregoing detailed description may be combined in any manner and, for the sake of unnecessary repetition, the invention is not limited in its scope to the particular combinations illustrated.

The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement that does not depart from the scope of the present invention should be construed as being included in the technical solutions of the present invention.

Claims

1. The liquid energy collecting device is characterized by comprising

A mounting member;

the liquid storage part is mounted on the mounting part, a connecting shaft is fixedly arranged on the liquid storage part, a rotating part is sleeved on the connecting shaft, when the liquid stored in the liquid storage part reaches a preset weight, the liquid storage part overturns by taking the axis of the connecting shaft as a center and discharges the liquid, and when the liquid storage part overturns, the rotating part rotates by taking the axis of the connecting shaft as a center;

a second vibrating portion on which a second piezoelectric element is provided, the second vibrating portion being mounted on the mount;

when the liquid storage part overturns, the rotating part intermittently drives the second vibrating part to vibrate.

2. The liquid energy harvesting device according to claim 1, wherein the second vibrating portion includes a second vibrating member, one end of the second vibrating member is mounted on the mounting member, the other end of the second vibrating member is cantilevered, and the second piezoelectric element is provided on the cantilevered end of the second vibrating member.

3. The fluid energy harvester of claim 2, wherein the rotating portion has at least one first magnet disposed thereon, and the second vibratory member has a second magnet disposed thereon that repels the first magnet.

4. The fluid energy harvester of claim 3, wherein the first magnet comprises a plurality of magnets distributed along an outer periphery of the rotating portion.

5. The fluid energy harvester of claim 4, wherein the first magnets are evenly distributed along an outer periphery of the rotating portion.

6. The fluid energy collection device according to claim 4 or 5, wherein the rotating portion includes a rotating member fitted around the coupling shaft, the rotating member has a plurality of receiving holes formed along an outer periphery thereof, and the plurality of first magnets are fitted into the receiving holes, respectively.

7. The fluid energy harvester of claim 6, wherein the rotor is disc-shaped.

8. The fluid energy collection device according to claim 6, wherein the rotating member is gear-shaped, and the plurality of receiving holes are provided on circumferential tooth surfaces of the rotating member, respectively.

9. The liquid energy harvesting device of claim 2, wherein the rotating portion comprises a cam member that is fitted over the coupling shaft, the cam member intermittently striking the second vibratory member when the reservoir is inverted.