CN114268191B - Double-shaft multistable wave vibration energy collecting device - Google Patents
Double-shaft multistable wave vibration energy collecting device Download PDFInfo
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- CN114268191B CN114268191B CN202111531377.6A CN202111531377A CN114268191B CN 114268191 B CN114268191 B CN 114268191B CN 202111531377 A CN202111531377 A CN 202111531377A CN 114268191 B CN114268191 B CN 114268191B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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Abstract
The invention discloses a double-shaft multistable wave vibration energy collecting device which comprises an inertial pendulum mechanism and a multistable mechanism. The inertial pendulum mechanism comprises a pendulum ball, a cylindrical permanent magnet is embedded below the pendulum ball, and the upper part of the pendulum ball is connected with a pendulum rod; the upper part of the swing rod is connected with the second rotating shaft; the second rotating shaft is suspended on the second lug buckle through a bearing, and two ends of the rotating shaft are connected with the speed reducing motor; the upper part of the second ear clip is connected with the first rotating shaft; the first rotating shaft is suspended on the first lug buckle, and two ends of the rotating shaft are connected with the speed reducing motor; the gear motor is fixed on the two sides of the ear clip through the motor bracket respectively. The multistable mechanism comprises a magnet tray, wherein a cylindrical permanent magnet is embedded in the center of the magnet tray, and an annular permanent magnet is embedded in the edge of the magnet tray. The invention adopts a cross double-shaft layout, and has better adaptability to the wave vibration direction; meanwhile, through the multi-stable mechanism, the frequency working range can be widened, and the adaptability to the wave vibration frequency is enhanced; in addition, the device has stable integral structure, symmetrical shape and higher energy conversion efficiency.
Description
Technical Field
The invention relates to the technical field of vibration energy collection, in particular to a double-shaft multistable vibration energy collecting device for converting wave vibration into electric energy.
Background
With the development of marine economy, marine robots are more and more actively exploring unknown sea areas. At present, the operation time of the marine robot is limited by the capacity of a battery carried by the marine robot, and the requirement of the long-time continuous operation of the robot cannot be met. Currently, researchers have designed and manufactured wave energy vibration energy collecting devices, which are mainly divided into two types: piezoelectric and electromagnetic. The piezoelectric vibration energy collecting device generates electric energy by utilizing the direct piezoelectric effect of the piezoelectric material when stress strain is generated under the influence of external vibration; however, the conventional piezoelectric energy collecting device has the problems of nonlinear output voltage, low energy efficiency and low output power, and only can supply energy to the sensor. The electromagnetic vibration energy collecting device generates electricity by utilizing Faraday's law of electromagnetic induction; at present, an electromagnetic vibration energy collecting device based on an inertial pendulum often has a narrow working frequency band and a single vibration direction, and is poor in environmental adaptability.
Chinese patent publication No. CN 111396237A discloses a spherical underwater robot wave energy capturing system and method based on an inertial pendulum, wherein the device mainly comprises a spherical shell, the inertial pendulum, a propeller, a generator and an anchoring rope; the energy capturing system can be closely combined with a spherical robot structure, and can realize wave energy capturing by utilizing the inertia pendulum and the power generation device of the robot. The existing tunable vibration energy collecting device (Chinese patent publication No. CN 108155774B) adopts a swing rod type structure, can change the natural frequency of the device by changing the distance between a spring and a fixed hinged support, and has the characteristics of good tunable and tuned linearity, simple structure, large output power density and the like. However, both the above-mentioned two devices adopt a transverse single-shaft layout, and the structure enables the inertial pendulum to rotate only in a single direction, so that unidirectional vibration energy collection can be realized. However, in practical application environments, the vibration excitation of the sea wave is multidirectional, and the structure has poor adaptability to the vibration direction.
The conventional pendulum power generation system with adjustable multiple degrees of freedom (Chinese patent publication No. CN 110454318B) comprises a floating energy rectifying module, an energy storage control module and a degree of freedom adjusting module, can capture the reciprocating acting force of waves and swing with multiple degrees of freedom, and can improve the energy conversion efficiency; but the device has larger size and more complex structure, and is not suitable for carrying the ocean robot platform.
In general, the electrical energy conversion rate is related to the vibration direction adaptability and the resonant frequency of the device, whether piezoelectric or electromagnetic. When the natural frequency of the device is consistent with the resonant frequency, the electric energy conversion rate is highest; when the external frequency deviates from the natural frequency of the device, the electric energy conversion rate is greatly reduced. Therefore, a device with good adaptability to the vibration direction and the vibration frequency is needed to improve the efficiency of energy collection aiming at the characteristics of low vibration frequency, wide frequency band and large randomness of vibration amplitude, frequency and direction of waves.
Disclosure of Invention
Aiming at the defects of the prior art, the invention designs a double-shaft multistable wave vibration energy collecting device. On one hand, through the cross double-shaft layout, vibration excitations in multiple directions can be captured, and the adaptability to the vibration direction of waves is good; on the other hand, through the multistable mechanism, the frequency working range of the device is widened, and the adaptability to the wave vibration frequency is enhanced, so that the wave energy power generation device suitable for being carried by the ocean robot is improved and enriched.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention comprises an inertial pendulum mechanism and a multistable mechanism, wherein the inertial pendulum mechanism comprises an inertial pendulum ball, a first cylindrical permanent magnet is embedded below the pendulum ball, and the upper part of the pendulum ball is connected with a pendulum rod.
A second shaft hole is formed above the oscillating bar and is connected with a second rotating shaft; the second rotating shaft is suspended on the second lug buckle, and two ends of the second rotating shaft are respectively connected with the shafts of the third speed reduction motor and the fourth speed reduction motor; and the third speed reduction motor and the fourth speed reduction motor are respectively positioned at two sides of the second ear clip.
A first shaft hole is formed above the second lug buckle and is connected with the first rotating shaft; the first rotating shaft is suspended on the first lug buckle, and two ends of the first rotating shaft are connected with the shafts of the first speed reducing motor and the second speed reducing motor; and the first speed reducing motor and the second speed reducing motor are respectively positioned at two sides of the first ear clip.
The inertial pendulum mechanism adopts a cross double-shaft layout and can adapt to vibration excitation in multiple directions.
The multistable mechanism comprises a magnet tray, and a second cylindrical permanent magnet is embedded in the center of the magnet tray; and an annular permanent magnet is embedded at the edge of the magnet tray.
The magnet tray is arranged right below the inertial pendulum mechanism.
The magnet tray and the permanent magnet below the pendulum ball form a multi-stable mechanism, so that the frequency working range of the device can be widened, and the adaptability to the wave vibration frequency is enhanced.
Furthermore, an upper S pole and a lower N pole of the first cylindrical permanent magnet are arranged; the upper N pole and the lower S pole of the second cylindrical permanent magnet are arranged; and an S pole above the annular permanent magnet and an N pole below the annular permanent magnet are placed.
Furthermore, a key groove is formed in a second shaft hole above the swing rod and is connected with the second rotating shaft through a second flat key.
Furthermore, the third gear motor and the fourth gear motor are respectively fixed on two sides of the second ear clip through corresponding second motor brackets.
Furthermore, a key groove is arranged on the first shaft hole above the second ear clip and is connected with the first rotating shaft through a first flat key.
Furthermore, the first speed reduction motor and the second speed reduction motor are respectively fixed on two sides of the first ear clip through the corresponding first motor supports.
Compared with the background art, the invention has the beneficial effects that:
the device adopts a cross double-shaft layout, can capture vibration excitation in multiple directions, and has good adaptability to the wave vibration direction; meanwhile, through a multi-stable mechanism, the frequency working range of the device is widened, and the adaptability to the wave vibration frequency is enhanced; in addition, the device has stable integral structure, symmetrical shape and good universality, and can be installed in any vibration device to generate electricity.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is an oblique view of the biaxial multistable wave vibration energy harvesting device of the present invention.
Figure 2 is a front half-sectional view of the device of the present invention.
Figure 3 is a side half sectional view of the device of the present invention.
In the figure: 1. a first ear clip 2, a speed reducing motor 3, a first rotating shaft 4, a bearing 5, a motor bracket 6, a swing rod 7, a swing ball 8 and a magnet tray, 9, a first permanent magnet, 10, a second permanent magnet, 11, a second ear clip, 12, a third permanent magnet, 13 and a second rotating shaft.
Detailed Description
The invention provides a double-shaft multistable wave vibration energy collecting device. The device comprises an inertia pendulum mechanism and a multi-stable state mechanism. The inertial pendulum mechanism comprises a pendulum ball, and a cylindrical permanent magnet is embedded below the pendulum ball; the S pole is arranged above the cylindrical permanent magnet, and the N pole is arranged below the cylindrical permanent magnet; the center of the pendulum ball is provided with a cross hole, the hole in the vertical direction is used for inserting the swing rod, and the hole in the horizontal direction is used for inserting a bolt to fix the pendulum ball and the swing rod; a shaft hole and a key groove are formed above the swing rod, and the swing rod is connected with the second rotating shaft through a flat key; the second rotating shaft is suspended on the second lug fastener through a bearing, two ends of the rotating shaft are hollowed and connected with a shaft of a speed reducing motor through a key slot and a set screw, and the speed reducing motor is respectively fixed on two sides of the second lug fastener through a motor bracket; a shaft hole and a key groove are formed above the second lug buckle and are connected with the first rotating shaft through a flat key; the first rotating shaft is suspended on the first lug buckle through a bearing, two ends of the rotating shaft are hollowed and connected with a shaft of a speed reducing motor through a key slot and a set screw, and the speed reducing motor is respectively fixed on two sides of the first lug buckle through a motor support; a convex groove is reserved above the first ear clip and used for fixing the device; the inertial pendulum mechanism adopts a cross double-shaft layout and can adapt to vibration excitation in multiple directions.
The multistable mechanism comprises a magnet tray, and the magnet tray is arranged right below the inertial pendulum mechanism; a cylindrical permanent magnet is embedded in the center of the magnet tray, and an N pole is arranged above the cylindrical permanent magnet and an S pole is arranged below the cylindrical permanent magnet; an annular permanent magnet is embedded at the edge of the magnet tray, and an S pole is arranged above the annular permanent magnet and an N pole is arranged below the annular permanent magnet; the magnet tray and the permanent magnet below the inertia pendulum ball form a multi-stable mechanism, so that the frequency working range of the device can be widened, and the adaptability to the wave vibration frequency is enhanced.
The device has stable integral structure, symmetrical shape and good universality, and can be installed in any vibration device to generate electricity.
The embodiment is as follows:
fig. 1-3 show a biaxial multistable wave vibration energy collecting device.
The apparatus in an embodiment includes an inertial pendulum mechanism and a multistable mechanism.
The inertia pendulum mechanism comprises a pendulum ball 7, and a cross hole is formed in the center of the pendulum ball; a groove is formed below the swing ball 7, a third permanent magnet 12 (namely a first cylindrical permanent magnet) is embedded in the groove, an S pole is arranged above the third permanent magnet 12, and an N pole is arranged below the third permanent magnet 12; the upper part of the swing ball 7 is connected with the swing rod 6 through a bolt; the upper end of the swing rod 6 is provided with a shaft hole and a key groove which are connected with the second rotating shaft 13 through a flat key; the second rotating shaft 13 is suspended on the second ear buckle 11 through a bearing 4, and two ends of the second rotating shaft 13 are hollowed and connected with a shaft of the speed reducing motor 2 through a key slot and a set screw; the speed reducing motor 2 is connected with the motor bracket 5 through a screw, and the motor bracket 5 is fixed on two sides of the second ear clip 11 through bolts; a shaft hole and a key groove are formed above the second ear clip 11 and are connected with the first rotating shaft 3 through a flat key; the first rotating shaft 3 is suspended on the first ear clip 1 through a bearing 4, and two ends of the first rotating shaft 3 are hollowed and connected with a shaft of the speed reducing motor 2 through a key slot and a set screw; the speed reducing motor 2 is connected with a motor bracket 5 through a screw, and the motor bracket 5 is fixed on two sides of the first ear clip 1 through bolts; a convex groove is reserved above the first ear clip 1 and used for fixing a device.
The multistable mechanism comprises a magnet tray 8, and a second permanent magnet 10 (namely a second cylindrical permanent magnet) is embedded in the center of the magnet tray 8; an N pole is arranged above the second permanent magnet 10, and an S pole is arranged below the second permanent magnet; an annular first permanent magnet 9 (namely an annular permanent magnet) is embedded at the edge of the magnet tray 8, and an S pole is arranged above the first permanent magnet 9 and an N pole is arranged below the first permanent magnet 9; the magnet tray 8 and the third permanent magnet 12 below the pendulum ball 7 form a multistable mechanism.
The working principle of the invention is as follows:
the device is installed in a cabin body of the marine robot, the inertial pendulum mechanism is suspended in the cabin body of the marine robot through a convex groove above the first ear clip 1, and the magnet tray 8 is arranged right below the inertial pendulum mechanism and fixed on the inner wall of the cabin body of the marine robot. The pendulum ball 7 forms a cross double-shaft inertia pendulum structure through the pendulum rod 6, the first rotating shaft 3 and the second rotating shaft 13, and drives the main shaft of the speed reducing motor 2 to rotate.
In the moving process, the marine robot provided with the double-shaft multistable wave vibration energy collecting device irregularly shakes under the excitation of sea waves to drive the first ear clip 1 and the magnet tray 8 to move together, and the pendulum ball 7 drives the first rotating shaft 3 and the second rotating shaft 13 to do reciprocating rotation due to the existence of inertia; and the first rotating shaft 3 and the second rotating shaft 13 are respectively connected with a speed reducing motor 2 to drive a main shaft of the speed reducing motor 2 to rotate. According to the electromagnetic induction law, the rotor inside the speed reduction motor rotates to cut magnetic induction lines generated by the stator, induced electromotive force is generated inside a rotor coil, and an external load forms a closed loop to form induced current.
Meanwhile, after the pendulum ball 7 swings, the third permanent magnet 12 installed at the bottom thereof generates repulsive force with the second permanent magnet 10 installed in the magnet tray 8, and generates attractive force with the first permanent magnet 9, thereby forming a multistable mechanism.
The device can capture vibration excitation in multiple directions through cross double-shaft layout, and improves the adaptability to the vibration direction; through the multistable mechanism, the frequency working range of the device is widened, and the adaptability to the wave vibration frequency is enhanced.
In the process of movement, since the sea wave movement is the superposition of vibration in multiple directions, the size and the direction of the current finally generated by the speed reducing motor 2 are irregular, and a rectifier is carried to convert irregular alternating current into direct current and collect the direct current.
Finally, it is also noted that the above list is only one specific embodiment of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (5)
1. The utility model provides a biax multistable wave vibration energy collection device which characterized in that: the permanent magnet synchronous motor comprises an inertial pendulum mechanism and a multi-stable mechanism, wherein the inertial pendulum mechanism comprises an inertial pendulum ball, a first cylindrical permanent magnet is embedded below the pendulum ball, and the upper part of the pendulum ball is connected with a pendulum rod;
a second shaft hole is formed above the oscillating bar and is connected with a second rotating shaft; the second rotating shaft is suspended on the second lug buckle, and two ends of the second rotating shaft are respectively connected with the shafts of the third speed reduction motor and the fourth speed reduction motor; the third speed reducing motor and the fourth speed reducing motor are respectively positioned at two sides of the second ear clip;
a first shaft hole is formed above the second lug buckle and is connected with the first rotating shaft; the first rotating shaft is suspended on the first lug buckle, and two ends of the first rotating shaft are connected with the shafts of the first speed reducing motor and the second speed reducing motor; the first speed reducing motor and the second speed reducing motor are respectively positioned on two sides of the first ear clip;
the inertial pendulum mechanism adopts a cross double-shaft layout and can adapt to vibration excitation in multiple directions;
the multistable mechanism comprises a magnet tray, and a second cylindrical permanent magnet is embedded in the center of the magnet tray; the edge of the magnet tray is embedded with an annular permanent magnet;
the magnet tray is arranged right below the inertial pendulum mechanism;
the magnet tray and the permanent magnet below the pendulum ball form a multi-stable mechanism, so that the frequency working range of the device can be widened, and the adaptability to the wave vibration frequency is enhanced;
the upper S pole and the lower N pole of the first cylindrical permanent magnet are arranged; an N pole above the second cylindrical permanent magnet and an S pole below the second cylindrical permanent magnet are placed; and an S pole above the annular permanent magnet and an N pole below the annular permanent magnet are arranged.
2. The biaxial multistable wave vibration energy harvesting device of claim 1 wherein: and a key groove is formed in the second shaft hole above the swing rod and is connected with the second rotating shaft through a second flat key.
3. The biaxial multistable wave vibration energy harvesting device according to claim 1, characterized in that: and the third speed reducing motor and the fourth speed reducing motor are respectively fixed on two sides of the second ear clip through corresponding second motor brackets.
4. The biaxial multistable wave vibration energy harvesting device of claim 1 wherein: and a key groove is formed in the first shaft hole above the second ear clip and is connected with the first rotating shaft through a first flat key.
5. The biaxial multistable wave vibration energy harvesting device of claim 1 wherein: first gear motor, second gear motor are fixed in first ear knot both sides respectively through the first motor support that corresponds.
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| CN202111531377.6A CN114268191B (en) | 2021-12-15 | 2021-12-15 | Double-shaft multistable wave vibration energy collecting device |
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| CN202111531377.6A CN114268191B (en) | 2021-12-15 | 2021-12-15 | Double-shaft multistable wave vibration energy collecting device |
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| CN117212034B (en) * | 2023-09-12 | 2024-07-05 | 浙江大学 | Deformable multi-degree-of-freedom multistable wave energy power generation device |
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| CN108155774A (en) * | 2018-01-17 | 2018-06-12 | 北京林业大学 | A kind of tunable energy gathering apparatus |
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