Speed ​​reduction belt composite power generation system based on magnetic screw

Abstract

The present invention relates to the technical field of speed bump power generation and energy recovery, and in particular to a speed bump composite power generation system based on an improved magnetic lead screw, comprising: a speed bump, a reluctance magnetic lead screw, an iron coreless axial flux generator, a magnetic spring and an energy storage device; the present invention can act on the magnetic lead screw with a captured vertical downward force when a vehicle passes over the speed bump, and drive the magnetic lead screw to perform linear motion under the action of the magnetic spring, and the magnetic lead screw can convert the low-speed linear motion into high-speed rotational motion, thereby driving the iron coreless axial flux generator to rotate and generate electricity, and finally storing the electrical energy in the energy storage device to complete the function of power generation and storage; the present invention solves the problem of slow running speed and low power generation efficiency of the generator of the speed bump power generation system, and optimizes the corresponding structure so that the system can work for a long time in the speed bump working environment, providing a new solution for energy recovery.

Description

Technical Field

[0001] The invention relates to the technical field of speed-reducing belt power generation and energy recovery, and in particular to a speed-reducing belt composite power generation system based on a magnetic lead screw. Background Art

[0002] With the acceleration of industrialization and urbanization, my country's demand for energy continues to increase, and the development and recycling of energy is becoming increasingly important. Speed ​​bumps are widely used on roads. When a vehicle passes over a speed bump, a lot of kinetic energy will be wasted in the process of reducing the speed from high speed to low speed, and the vibration energy generated by the speed bump cannot be recycled. The speed bump power generation system can convert vibration energy into electrical energy, and has the functions of deceleration and power generation. It conforms to the new concept of energy conservation and environmental protection and has great development potential. However, the linear motors in the existing speed bump power generation devices run slowly, have low conversion efficiency, waste a lot of energy, and cannot effectively convert the gravitational potential energy and kinetic energy of the vehicle. Therefore, how to make the generator in the system operate at high speed and improve the overall power generation efficiency of the system has become a top priority.

[0003] In response to the key needs in this field, it is necessary to optimize and improve the previous speed bump power generation system; by introducing a magnetic screw to replace the mechanical transmission device in the previous system, the high-speed operation of the system can be better achieved, and the kinetic energy and gravitational potential energy recovered by the speed bump can be fully utilized and converted into electrical energy; the composite speed bump power generation system based on the magnetic screw provided by the present invention can reduce the heat generated by the system while achieving high-speed operation of the system, enhance the stability of the system operation, and enable the power generation system to have the ability to operate for a long time in a highway working environment. Summary of the invention

[0004] The purpose of the present invention is to provide a speed-reducing belt composite power generation system based on a magnetic screw to solve the technical problems existing in the above-mentioned background technology; the traditional mechanical transmission device is replaced by a reluctance magnetic screw to solve the problems of slow running speed and low conversion efficiency of the original linear generator; at the same time, some structures in the proposed speed-reducing belt composite power generation system are optimized to make it better adapt to the highway speed-reducing belt environment.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A speed-reduction belt composite power generation system based on a magnetic lead screw, comprising: a rubber speed-reduction belt installed on the surface and capable of vertical displacement, a reluctance magnetic lead screw, a centerless axial flux generator, a magnetic spring and an energy storage battery, wherein the bottom end surface of the rubber speed-reduction belt is pressed against the top end of the reluctance magnetic lead screw, and the reluctance magnetic lead screw comprises: a screw, a magnetic conductive screw, a ferromagnetic steel thread and a magnetic nut, wherein the upper and lower ends of the magnetic conductive screw are fixedly connected with a screw, a ferromagnetic steel thread is provided on the magnetic conductive screw, a magnetic nut is provided on the outer movable sleeve of the magnetic conductive screw, a side of the ferromagnetic steel thread close to the inner wall of the magnetic nut is an N pole or an S pole, and the magnetic nut comprises: a magnetic nut shell and an arc-shaped permanent magnet, wherein the magnetic nut shell is a cylindrical shape penetrating from top to bottom, and the arc-shaped permanent magnet is provided with a plurality of A dry group, each group is provided with a plurality of arc-shaped permanent magnets, each group of which are connected in sequence to form a spiral structure of °, and the magnetic poles of two adjacent groups of arc-shaped permanent magnets are opposite; the centerless axial flux generator is nested on the outside of the reluctance magnetic lead screw, and the centerless axial flux generator includes: two motor housings symmetrically arranged up and down, a rotor with a permanent magnet structure and a waveform PCB stator winding, the waveform PCB stator winding is fixedly connected to the outer wall of the magnetic nut housing, two rotors with opposite magnetic poles are arranged on the upper and lower sides of the waveform PCB stator winding, and the opposite sides of the two rotors are fixedly connected to the motor housing, the magnetic spring is arranged at the bottom end of the reluctance magnetic lead screw and is rigidly connected to it, and the centerless axial flux generator is electrically connected to a storage battery.

[0007] Furthermore, the ground surface is provided with a strip groove, the rubber speed bump is installed in the strip groove matching the ground surface, and the rubber speed bump can be vertically displaced in the strip groove.

[0008] Furthermore, each group of arc-shaped permanent magnets is provided with 24 arc-shaped permanent magnets, and the arc angle of each arc-shaped permanent magnet is 15°.

[0009] Furthermore, two adjacent groups of arc-shaped permanent magnets are tightly connected in sequence.

[0010] Furthermore, the manufacturing method of the corrugated PCB stator winding is: milling the printed circuit board and conducting a conductive plating groove, both sides of the plating groove of the Hall effect layer, both sides of the plating groove of the bottom layer and both sides of the plating groove of the power layer are provided with electrically connected radial conductors, and the power layer is axially stacked between the Hall effect layer and the bottom layer, so that all radial conductors of each layer of the printed circuit board are axially connected in parallel through the conductive plating groove.

[0011] Furthermore, the waveform PCB stator winding adopts a waveform winding topology structure.

[0012] Furthermore, the rotor includes: a rectangular permanent magnet block, a trapezoidal permanent magnet block and a Halbach array, wherein the rectangular permanent magnet block, the trapezoidal permanent magnet block and the Halbach array each have a plurality of circular arrays, two rectangular permanent magnet blocks and two trapezoidal permanent magnet blocks are symmetrically arranged on both tangential sides of two adjacent Halbach arrays, and the rectangular permanent magnet blocks on the opposite sides of the two adjacent Halbach arrays are connected to the trapezoidal permanent magnet blocks.

[0013] Furthermore, the magnetic spring includes: a spring shell and two circular permanent magnets with opposite magnetic directions. The spring shell is a cylindrical shape with an open top. The two circular permanent magnets with opposite magnetic directions are respectively arranged on the spring shell. The circular permanent magnet at the upper end is vertically slidably connected to the inner wall of the spring shell, and the top of the circular permanent magnet at the upper end is fixedly connected to the pressure plate arranged at the bottom end of the screw at the bottom.

[0014] Furthermore, the centerless axial flux generator also includes a brush, which is arranged on the motor housing and electrically connected to the corrugated PCB stator winding, and the brush is connected to the energy storage battery through a wire.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention converts low-speed linear motion into high-speed rotary motion by using a magnetic screw device, thereby solving the problems of slow running speed and low power generation efficiency of the original speed reduction belt power generation device.

[0017] 2. By optimizing the permanent magnet structure at the magnetic screw and magnetic nut, the difficulty in manufacturing rational spiral permanent magnets is solved, and its topological structure is further optimized so that it can achieve the shortest linear displacement of the rotor each time while exerting higher axial force.

[0018] 3. The present invention reduces the volume and weight of the stator winding in the coreless axial flux generator by using a corrugated PCB stator winding structure, and is easy to assemble. At the same time, it reduces the cross-sectional size of the wire, reduces eddy current losses, and increases the power output of the generator.

[0019] 4. A new type of permanent magnet structure array is used at the rotor to enhance the air gap flux density, reduce the harmonic content of the air gap magnetic density, and make the air gap magnetic density waveform closer to a sinusoidal distribution; at the same time, the ferromagnetic back iron is removed to reduce the total active mass of the generator.

[0020] 5. The present invention uses magnetic springs to replace mechanical springs, so that the power generation system has good vibration picking characteristics and will not produce mechanical fatigue due to long-term movement, and has the possibility of long-term operation and wider application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the reluctance type magnetic screw in the present invention;

[0023] Figure 3 It is a structural view of the centerless axial flux generator of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the corrugated PCB stator winding in the present invention.

[0025] The numbers in the accompanying drawings are: 1-rubber speed bump, 2-screw, 3-magnetic screw, 4-ferromagnetic steel thread, 5-magnetic nut housing, 6-arc permanent magnet, 7-motor housing, 8-rotor, 9-corrugated PCB stator winding, 10-spring housing, 11-circular permanent magnet, 12-energy storage battery. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figures 1 to 4 As shown, a speed reduction belt composite power generation system based on a magnetic lead screw comprises: a rubber speed reduction belt 1 installed on the surface and capable of vertical displacement, a reluctance magnetic lead screw, a centerless axial flux generator, a magnetic spring and an energy storage battery 12, the bottom end surface of the rubber speed reduction belt 1 is pressed against the top of the reluctance magnetic lead screw, the reluctance magnetic lead screw comprises: a screw 2, a magnetic screw 3, a ferromagnetic steel thread 4 and a magnetic nut, the upper and lower ends of the magnetic screw 3 are fixedly connected with the screw 2, the magnetic screw 3 is provided with a ferromagnetic steel thread 4, the outer movable sleeve of the magnetic screw 3 is provided with a magnetic nut, the side of the ferromagnetic steel thread 4 close to the inner wall of the magnetic nut is an N pole or an S pole, the magnetic nut comprises: a magnetic nut shell 5 and an arc-shaped permanent magnet 6, the magnetic nut shell 5 is a cylindrical shape penetrating from top to bottom, and the arc-shaped permanent magnet 6 is provided with a plurality of Groups, each group is provided with a plurality of arc permanent magnets 6, each group of which are connected in sequence to form a 360° spiral structure, and the magnetic poles of two adjacent groups of arc permanent magnets 6 are opposite; the centerless axial flux generator is nested on the outside of the reluctance magnetic screw, and the centerless axial flux generator includes: two motor housings 7 symmetrically arranged up and down, a rotor 8 with a permanent magnet structure and a corrugated PCB stator winding 9, the corrugated PCB stator winding 9 is fixedly connected to the outer wall of the magnetic nut housing 5, two rotors 8 with opposite magnetic poles are arranged on the upper and lower sides of the corrugated PCB stator winding 9, and the opposite sides of the two rotors 8 are fixedly connected to the motor housing 7, the magnetic spring is arranged at the bottom end of the reluctance magnetic screw and is rigidly connected to it, and the centerless axial flux generator is electrically connected to the energy storage battery 12.

[0028] In this embodiment, a strip groove is opened on the ground surface, and the rubber speed bump 1 is installed in the strip groove matching the strip groove. The rubber speed bump 1 can be vertically displaced in the strip groove.

[0029] In this embodiment, each group of arc-shaped permanent magnets 6 is provided with 24 pieces, and the arc angle of each arc-shaped permanent magnet 6 is 15°; two adjacent groups of arc-shaped permanent magnets 6 are closely connected in sequence, and are staggered and distributed on the circumferential surface of the magnetic nut in an NSNS arrangement manner, leaving no gaps between the arc-shaped permanent magnets. This method can effectively solve the problems of difficulty in manufacturing and complex assembly of ideal spiral permanent magnets; the magnetic screw magnetic nut uses a double-pole structure, which increases the number of rotor spins when the linear displacement of the magnetic nut remains unchanged, thereby showing a higher axial force while making the rotor rotate with the shortest linear displacement each time.

[0030] In this embodiment, the manufacturing method of the corrugated PCB stator winding 9 is as follows: the printed circuit board is milled and conductively plated, both sides of the plating groove of the Hall effect layer, both sides of the plating groove of the bottom layer and both sides of the plating groove of the power layer are provided with electrically connected radial conductors, the power layer is axially stacked between the Hall effect layer and the bottom layer, so that all radial conductors of each layer of the printed circuit board are axially connected in parallel through the conductive plating groove; the PCB stator winding can be easily produced; the corrugated PCB stator winding 9 adopts the topological structure of the corrugated winding, thereby reducing the cross-sectional area of ​​the wire, suppressing eddy current loss, and increasing the output power of the generator, so that the power generation system is more adaptable to the working environment of the speed bump and has the possibility of long-term operation; the printed circuit board with the stator coil printed with a corrugated topological structure as the power layer is milled and conductively plated, both sides of the plating groove of the power layer are provided with radial conductors corresponding to the shape of the radial conductor of the Hall effect layer, and the radial conductors on both sides of the plating groove of the power layer are electrically connected.

[0031] In this embodiment, the rotor 8 includes: a rectangular permanent magnet block, a trapezoidal permanent magnet block and a Halbach array. The rectangular permanent magnet block, the trapezoidal permanent magnet block and the Halbach array all have a plurality of circular arrays. Two rectangular permanent magnet blocks and two trapezoidal permanent magnet blocks are symmetrically arranged on the tangential sides of two adjacent Halbach arrays, and the rectangular permanent magnet blocks on the opposite sides of the two adjacent Halbach arrays are connected to the trapezoidal permanent magnet blocks. Permanent magnets with different magnetization directions can increase the fundamental amplitude of the air gap magnetic density, the trapezoidal permanent magnet structure can reduce the harmonic content of the air gap magnetic density, and the Halbach permanent magnet array can make the air gap magnetic density waveform closer to the sinusoidal distribution, and at the same time can effectively enhance the air gap magnetic flux density, remove the ferromagnetic back iron, and reduce the total active mass of the generator.

[0032] In this embodiment, the magnetic spring includes: a spring housing 10 and two circular permanent magnets 11 with opposite magnetic directions. The spring housing 10 is a cylindrical shape with an open top. The two circular permanent magnets 11 with opposite magnetic directions are respectively arranged on the spring housing 10. The circular permanent magnet 11 at the upper end is vertically slidably connected to the inner wall of the spring housing 10, and the top of the circular permanent magnet 11 at the upper end is fixedly connected to the pressure plate arranged at the bottom end of the screw 2 at the bottom. The magnetic spring uses the repulsive force between the magnets to complete the reciprocating motion process, so that the power generation system has good vibration pickup characteristics, and will not produce mechanical fatigue due to long-term movement, and has the possibility of long-term operation.

[0033] The centerless axial flux generator also includes brushes, which are arranged on the motor housing 7 and electrically connected to the corrugated PCB stator winding 9, and the brushes are connected to the energy storage battery 12 through wires.

[0034] When the device is in use, the magnetic spring can be compressed as the vehicle passes by to complete reciprocating linear motion, and drive the magnetic screw to move in advance, thereby converting the vehicle's kinetic energy and gravitational potential energy into rotational mechanical energy of the magnetic screw; the ironless axial flux generator is combined with the magnetic screw and nested to form a whole; since the ironless axial flux generator is nested on the magnetic screw, the kinetic energy and gravitational potential energy captured by the magnetic spring can be converted into screw rotational mechanical energy through the magnetic screw, and then the ironless axial flux generator is driven to rotate through the magnetic screw, which drives the ironless axial flux generator rotor to rotate, which can induce an electromotive force on its stator, thereby converting the mechanical energy into electrical energy.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top / bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A speed reduction belt composite power generation system based on a magnetic screw, characterized in that: include: A rubber speed bump (1) installed on the ground and capable of vertical displacement, a reluctance magnetic lead screw, a centerless axial magnetic flux generator, a magnetic spring and an energy storage battery (12), wherein the bottom end surface of the rubber speed bump (1) is pressed against the top end of the reluctance magnetic lead screw, and the reluctance magnetic lead screw comprises: a screw (2), a magnetic screw (3), a ferromagnetic steel thread (4) and a magnetic nut, wherein the screw (2) is fixedly connected to the upper and lower ends of the magnetic screw (3), the ferromagnetic steel thread (4) is provided on the magnetic screw (3), and the magnetic screw (3) The outer movable sleeve is provided with a magnetic nut, the side of the ferromagnetic steel thread (4) close to the inner wall of the magnetic nut is an N pole or an S pole, the magnetic nut comprises: a magnetic nut shell (5) and an arc-shaped permanent magnet (6), the magnetic nut shell (5) is a cylindrical shape penetrating from top to bottom, the arc-shaped permanent magnet (6) is provided in a plurality of groups, each group is provided with a plurality of arc-shaped permanent magnets, and the plurality of arc-shaped permanent magnets (6) in each group are connected in sequence to form a 360° spiral structure, and the magnetic poles of two adjacent groups of arc-shaped permanent magnets (6) are opposite; the centerless axial flux generator is nested in the reluctance magnetic The coreless axial magnetic flux generator comprises: two motor housings (7) symmetrically arranged in an upper and lower manner, a rotor (8) with a permanent magnet structure, and a corrugated PCB stator winding (9); the corrugated PCB stator winding (9) is fixedly connected to the outer wall of the magnetic nut housing (5); two rotors (8) with opposite magnetic poles are arranged on the upper and lower sides of the corrugated PCB stator winding (9); the two rotors (8) are fixedly connected to the motor housing (7) on the opposite sides; the magnetic spring is arranged at the bottom end of the reluctance magnetic lead screw and is connected to the motor housing (7) The coreless axial flux generator is electrically connected to an energy storage battery (12); the rotor (8) comprises: a rectangular permanent magnet block, a trapezoidal permanent magnet block and a Halbach array, wherein the rectangular permanent magnet block, the trapezoidal permanent magnet block and the Halbach array each have a plurality of circular arrays, two rectangular permanent magnet blocks and two trapezoidal permanent magnet blocks are symmetrically arranged on both sides of the tangential direction of two adjacent Halbach arrays, and the rectangular permanent magnet blocks on the opposite sides of the two adjacent Halbach arrays are connected to the trapezoidal permanent magnet blocks.

2. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: The ground surface is provided with a strip groove, the rubber speed bump (1) is installed in the strip groove matching the ground surface, and the rubber speed bump (1) can be vertically displaced in the strip groove.

3. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: Each group of arc-shaped permanent magnets (6) is provided with 24 arc-shaped permanent magnets, and the arc angle of each arc-shaped permanent magnet (6) is 15°.

4. According to claim 3, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: Two adjacent groups of arc-shaped permanent magnets (6) are tightly connected in sequence.

5. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: The manufacturing method of the corrugated PCB stator winding (9) comprises: milling a printed circuit board and performing a conductive plating groove, both sides of the plating groove of the Hall effect layer, both sides of the plating groove of the bottom layer, and both sides of the plating groove of the power layer are provided with electrically connected radial conductors, and the power layer is stacked axially between the Hall effect layer and the bottom layer, so that all radial conductors of each layer of the printed circuit board are axially connected in parallel through the conductive plating groove.

6. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: The wave-shaped PCB stator winding (9) adopts a wave-shaped winding topology structure.

7. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: The magnetic spring comprises: a spring housing (10) and two circular permanent magnets (11) with opposite magnetic directions; the spring housing (10) is cylindrical with an open top; the two circular permanent magnets (11) with opposite magnetic directions are respectively arranged on the spring housing (10); the circular permanent magnet (11) at the upper end is vertically slidably connected to the inner wall of the spring housing (10); and the top end of the circular permanent magnet (11) at the upper end is fixedly connected to a pressure plate arranged at the bottom end of a screw rod (2) at the bottom.

8. According to claim 1, a speed reduction belt composite power generation system based on a magnetic screw is characterized in that: The centerless axial flux generator further comprises a brush, which is arranged on the motor housing (7) and electrically connected to the corrugated PCB stator winding (9), and the brush is connected to the energy storage battery (12) via a wire.

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