CN102594204B - Train vibration energy recovery based power generator for mobile phone charging - Google Patents

Abstract

The invention relates to a mobile phone charging power generation device based on train vibration energy recovery, which belongs to the technical field of new energy and power generation. The upper cover, the housing and the base are connected by screws, the first piezoelectric vibrator is clamped between the upper cover and the housing, and the second piezoelectric vibrator is clamped between the housing and the base. A ball pin sleeve is installed on the upper cover of the ball pin sleeve, a ball pin is installed in the ball pin sleeve, a screw is installed on the ball pin, and a spring one, an inertia block and a spring two are sequentially set on the screw rod, and a ring magnet is installed on the inertia block, A magnet is installed at the free end of the piezoelectric vibrator, and the magnet at the end of the piezoelectric vibrator is installed close to the same-sex magnetic pole of the ring magnet on the inertia block. The advantage lies in that vibration energy recovery in any direction, low frequency and large amplitude can be realized.

Description

Power generation device for mobile phone charging based on train vibration energy recovery

technical field

The invention belongs to the technical field of new energy and power generation, and specifically relates to a miniature generator for recovering vibration energy, which is used for real-time charging of portable micro-power electronic products such as mobile phones.

Background technique

Mobile phones have become an indispensable portable communication tool in modern life. While enjoying the convenience of communication brought by mobile phones, people usually also need to face the helplessness brought about by the depletion of battery energy, especially on long-distance trains. Although modern train carriages are equipped with 220V power sockets, these power sockets do not actually supply power for the sake of driving safety and avoiding fires caused by improper use of electricity. Therefore, long-distance passengers often face the problem of running out of power for their mobile phones, and the portable miniature power generation device can effectively solve this problem. At present, the research on micro power generating devices based on the principles of electromagnetic, electrostatic, thermoelectric, capacitive, piezoelectric and solar energy has become a frontier hotspot at home and abroad. The advantage of the machine is that it is simple in structure, easy to manufacture, and realizes the miniaturization and integration of the structure, so the scope of application is wider, and it has been gradually used in the fields of sensors, health monitoring and wireless transmission systems.

Piezoelectric generators are mainly used to recover vibration energy for power generation. At present, there are many patent applications in this area both at home and abroad. Most of the early piezoelectric power generation devices were single cantilever beams and circular piezoelectric vibrators. In order to increase the effective frequency bandwidth of the power generation device or realize energy collection in different vibration directions, a power generation device composed of multiple piezoelectric vibrators has appeared, such as : Chinese patent 200810106046.6 proposes a broadband piezoelectric generator composed of cantilever beam piezoelectric vibrators with different lengths, and Chinese invention patent 201010601354.3 proposes a dandelion generator composed of multiple cantilever beam piezoelectric vibrators, which can realize "longitudinal vibration and A horizontal vibration energy recovery", and so on. However, due to the singleness of the deformation direction of the bending piezoelectric vibrator, the above-mentioned method of combining multiple piezoelectric vibrators can only realize vibration energy recovery in one or two directions, and the adaptability to the vibration environment is poor, which seriously restricts The popularization and application of piezoelectric power generation technology.

As we all know, when a train is moving, its carriage is excited by various vibration sources, such as longitudinal vibration caused by the connection of rails, front and rear vibration caused by speed changes, lateral swing caused by curves, etc., and the above vibration sources have interactive coupling effects. Therefore, the vibration of train carriages has time-varying multi-directionality, and the existing single-degree-of-freedom or two-degree-of-freedom vibration power generation devices cannot effectively recover energy.

Contents of the invention

The invention provides a mobile phone charging power generation device based on train vibration energy recovery to solve the disadvantages of the existing vibrating piezoelectric power generation device such as single degree of freedom and poor vibration direction adaptability, and can be used for charging mobile phones during long-distance travel.

The technical solution adopted by the present invention is: the upper cover, the housing and the base are connected by screws, a piezoelectric vibrator is clamped between the upper cover and the housing, and a piezoelectric vibrator is clamped between the housing and the base. The second piezoelectric vibrator is equipped with a ball pin sleeve on the upper cover, a ball pin is installed in the ball pin sleeve, a screw is installed on the ball pin, and a spring 1, an inertia block and a spring 2 are sequentially set on the screw rod. A ring magnet is installed on the inertial block. The piezoelectric vibrator is formed by bonding a metal substrate and a piezoelectric chip. A magnet is installed at the free end of the piezoelectric vibrator. The magnetic poles of the same sex of the magnet are installed close to each other, and the metal substrate and the piezoelectric chip of the piezoelectric vibrator are connected with the control circuit through wires.

In the present invention, the ball pin can swing in any direction in the ball pin sleeve, and the ring magnet driven by the inertia block can slide along the screw rod. In the natural state, the inertia block is in a balanced position under the action of the spring force and the repulsive force between the magnets, and the magnet at the end of the piezoelectric vibrator and the ring magnet on the inertia block are in a relatively static state; when the power generating device is subjected to any external force When vibrating in one direction, the position of the inertia block and the magnet on the inertia block changes, causing the distance and repulsive force between the magnet on the piezoelectric vibrator and the magnet on the inertia block to change, so that the piezoelectric vibrator is in a stressed state Changes and produces bending deformation, converting mechanical energy into electrical energy.

The advantage of the present invention is that: the cantilever beam piezoelectric vibrator is excited by using the ball pin to drive the slidable magnet, which can realize vibration energy recovery in any direction, low frequency and large amplitude.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a power generating device in a natural static state in a preferred embodiment of the present invention;

Fig. 2 is A-A sectional schematic diagram of Fig. 1;

Fig. 3 is a schematic structural view of a metal substrate in a preferred embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of the structure when the power generating device vibrates up and down in a preferred embodiment of the present invention;

Fig. 5 is a schematic cross-sectional view of the structure of the generator device vibrating in the horizontal direction in a preferred embodiment of the present invention.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the upper cover 1, the housing 8 and the base 14 are connected by screws, and a piezoelectric vibrator 7 is clamped between the upper cover 1 and the housing 8. A piezoelectric vibrator 2 9 is clamped between the housing 8 and the base 14; a ball pin sleeve 2 is installed on the upper cover 1, a ball pin 3 is housed in the ball pin sleeve 2, and a ball pin 3 is installed on the ball pin 3 Screw rod 4, spring one 5, inertial block 12 and spring two 11 are housed in sequence on the screw rod 4; Ring magnet 13 is installed on the described inertial block 12; 7-1-1 is bonded with the piezoelectric wafer 7-2 and the wafer 7-3, and the piezoelectric wafer 7-2 and the piezoelectric wafer 7-3 are connected by wires 15; the piezoelectric vibrator 9 is made of metal The cantilever beam 9-1-1 on the substrate 9-1 is formed by bonding the piezoelectric wafer 9-2 and the wafer 9-3, and the piezoelectric wafer 9-2 and the piezoelectric wafer 9-3 are connected by wires 16; The free end of the piezoelectric vibrator 7 is equipped with a magnet one 6, and the free end of the piezoelectric vibrator two 9 is equipped with a magnet two 10, and the same-sex magnetic poles of the magnet one 6, magnet two 10 and ring magnet 13 are installed close to each other; The first piezoelectric vibrator 7 and the second piezoelectric vibrator 9 are respectively connected to the energy conversion and control circuit 19 through the lead wire group 17 and the lead wire group 18; the energy conversion and control circuit 19 is a current prior art.

In the present invention, the ball pin 3 can swing in any direction in the ball pin sleeve 2 , and the inertia block 12 and the ring magnet 13 can slide along the screw rod 4 . Under the natural state, the inertia block 12, the spring two 11, and the effect of the repulsive force between the magnets are in a balanced position, and the magnet one 6, the magnet two 10 and the ring magnet 13 are in a relatively static state; When vibrating in one direction, the positions of the inertial mass 12 and the ring magnet 13 change, and the distance and repulsive force between the ring magnet 13 and the magnet 6 1 and the magnet 2 10 change, so that the stress state of the piezoelectric vibrator changes, and Bending deformation is generated to convert mechanical energy into electrical energy; the generated electrical energy can be used for charging after being converted by the control circuit 19 .

As shown in Figure 4, when the power generating device simply reciprocates up and down, piezoelectric vibrator 1 7 and piezoelectric vibrator 2 9 vibrate up and down due to the inertial force of free end magnet 1 6 and magnet 2 10; at the same time, The inertia block 12 and the ring magnet 13 also slide up and down along the screw rod 4, the spring one 5 is compressed, and the spring two 11 is stretched, causing the distance between the ring magnet 13, the magnet one 6 and the magnet two 10 and the mutual repulsive force to change, thereby intensifying the pressure. Vibration amplitude of the vibrator.

As shown in Figure 5, when the power generating device reciprocates in any horizontal direction, the inertia block 12 and the ring magnet 13 will drive the ball pin 3 to rotate through the screw 4, so that the ring magnet 13 on the inertia block 12 and the end of the piezoelectric vibrator The distance between the magnets and the mutual repulsion force change: in Fig. 5, ring magnet 13 and magnet one 6 and magnet two The distance between them decreases and the repulsive force increases, causing the piezoelectric vibrator-7 to bend upward, and the piezoelectric vibrator Two are bent downwards; Meanwhile, ring magnet 13 and magnet one and the distance between magnet two and 10 increases, the repulsive force decreases, and the piezoelectric vibrator one and the piezoelectric vibrator 2 are respectively bent downward and upward under the action of its own elastic force.

Claims (1)

1. the power generator for mobile phone charging reclaimed based on train vibration energy, it is characterized in that: upper cover, be connected by screw between housing and base, between described upper cover and housing, clamping has piezoelectric vibrator one, between described housing and base, clamping has piezoelectric vibrator two, cover on described and ball pin cover is housed, described ball pin cover is built with ball pin, ball pin is provided with screw rod, screw rod is set with spring one successively, inertial mass and spring two, described inertial mass is provided with annular magnet, described piezoelectric vibrator forms by metal substrate is bonding with piezoelectric chip, the free end of piezoelectric vibrator is provided with magnet, the like pole of the annular magnet in the magnet of described piezoelectric vibrator end and inertial mass is near installing, the metal substrate of described piezoelectric vibrator is connected with control circuit by wire with piezoelectric chip, ball pin can do the swing of any direction in ball pin cover, inertial mass drives annular magnet can along screw slide, in its natural state, under the effect of inertial mass repulsive force between spring force and magnet, be in equilbrium position, between the annular magnet in the magnet of piezoelectric vibrator end and inertial mass, be in relative static conditions, when TRT is by extraneous either direction vibration, the position of the magnet in inertial mass and inertial mass changes, the distance between the magnet on piezoelectric vibrator and the magnet in inertial mass and repulsive force is caused to change, thus make piezoelectric vibrator stress change and produce flexural deformation, convert mechanical energy to electric energy.