A downhole multi-stage turbulent vibration type magnetic power generation device

Abstract

The present invention relates to a downhole multi-stage turbulent vibration type magnetic power generation device, which includes: an installation and fixation module and a power generation module; the installation and fixation module includes an installation cylinder, a permanent magnet fixator, a columnar permanent magnet, and a shaft end fixator. The columnar permanent magnet is fixed to the lower end of the installation cylinder through the permanent magnet fixator. First slideways and second slideways are arranged at intervals on the inner wall of the installation cylinder. Liquid inlet holes are arranged at the bottoms of the first slideway and the second slideway, and liquid outlet holes are arranged on the inner walls of the first slideway and the second slideway; the power generation module is arranged in the installation cylinder, and a first annular permanent magnet, a bionic vibration generator, a second coil, and a third coil are fixedly arranged on the shaft at intervals from bottom to top; the external shape of the bionic vibration generator is the structure of the back of a bionic dolphin, and the overall external shape is streamlined. The inner part of the bionic vibration generator is an arc surface that matches the shaft. The present invention uses a bionic structure to vibrate the shaft, integrates the functions of vibration power generation and fluid kinetic energy power generation, and realizes low-cost power generation downhole.

Description

Technical Field

[0001] The present invention relates to an underground power generation device for oil fields, and more particularly to an underground multi-stage turbulent vibration type magnetic power generation device. Background Art

[0002] With the rapid development of the petroleum industry and the application of many technologies such as underground swirl separation, the power transmission of underground devices has gradually become an indispensable part of related fields. At present, in oil field sites, common underground power generation devices need to be connected to external related power devices to provide underground electrical energy. They face disadvantages such as complex connection lines, high protection costs, and low economic benefits. To solve the above problems, it is very necessary to propose an underground power generation device. Chinese Utility Model Patent: ZL201820510445.8, an oil well potential energy power generation device, uses a gear rotating shaft mechanism to drive an external generator for power generation. However, the external generator required by this patent is huge in size and cannot be directly lowered into the well to directly supply power to underground equipment. Therefore, it is uneconomical to connect wires from the ground to the underground; in addition, this patent cannot flexibly connect multiple power generation devices in series according to power generation requirements, which easily leads to waste of fluid kinetic energy or insufficient power generation capacity. Summary of the Invention

[0003] The object of the present invention is an underground multi-stage turbulent vibration type magnetic power generation device, which is used to solve the problems of complex circuits, high costs or insufficient power generation capacity existing in underground power generation devices in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: This downhole multi-stage turbulent vibration type magnetic power generation device includes an installation and fixation module and a power generation module; the installation and fixation module includes an installation cylinder, a permanent magnet fixator, a columnar permanent magnet, and a shaft end fixator. The columnar permanent magnet is fixed at the lower end of the installation cylinder through the permanent magnet fixator. First slideways and second slideways are arranged at intervals on the inner wall of the installation cylinder. The first slideway and the second slideway are both jackets formed by the installation cylinder and the corresponding inner cylinders. Liquid inlet holes are provided at the bottoms of the first slideway and the second slideway, and liquid outlet holes are provided on the inner walls of the first slideway and the second slideway; the power generation module is arranged in the installation cylinder and includes a shaft, a primary coil, a first annular permanent magnet, a bionic vibration exciter, a second coil, a first annular magnet, a third coil, and a second annular magnet. The shaft is vertically fixed at the center of the installation cylinder. The first annular permanent magnet, the bionic vibration exciter, the second coil, and the third coil are fixedly arranged on the shaft at intervals from bottom to top. The upper end of the shaft is fixed to the upper end of the installation cylinder through the shaft end fixator. The columnar permanent magnet is installed at the lower end of the shaft. The primary coil surrounds the periphery of the first annular permanent magnet. The first annular magnet and the first spring thereon are located in the first slideway. The first annular magnet surrounds the second coil. The second annular magnet and the second spring thereon are located in the second slideway. The second annular magnet surrounds the third coil; the external shape of the bionic vibration exciter is the structure of the back of a bionic dolphin, and the overall external shape is streamlined. The inside of the bionic vibration exciter is an arc surface that matches the shaft.

[0005] In the above solution, the installation cylinder is composed of a first outer pipe and a second outer pipe connected by threads. The first outer pipe is located at the lower end of the second outer pipe. The permanent magnet fixator is located inside the first outer pipe and is threadedly connected to the lower port of the first outer pipe. The columnar permanent magnet is coaxially fixed at the center of the permanent magnet fixator. The shaft end fixator is located in the second outer pipe and is threadedly connected to the upper port of the second outer pipe; the limiting spring is sleeved on the shaft through the collar at one end and is directly hung on the fixing ring on the inner wall of the first outer pipe through the hook at the other end.

[0006] In the above solution, there are multiple threaded sections on the shaft, and there are also limiting rings and bionic vibration exciter mounting holes on the shaft. The shaft is an elastic body. The limiting ring restricts the position of the first annular permanent magnet. The bionic vibration exciter mounting hole is connected to the bionic vibration exciter through screws.

[0007] In the above solution, the primary coil includes a primary coil housing and primary coil wires. The primary coil housing has external threads, and the primary coil housing is threadedly connected to the first outer pipe; the first annular permanent magnet is composed of a first annular permanent magnet cathode and a first annular permanent magnet anode. The first annular permanent magnet mounting hole inside the first annular permanent magnet has internal threads, and the first annular permanent magnet is threadedly connected to the shaft end.

[0008] In the above solution, the second coil is composed of a second coil housing and the second coil wire inside. The second coil housing has internal threads and is threadedly connected to the shaft; the third coil is composed of a third coil housing and the third coil wire inside. The third coil housing has internal threads and is threadedly connected to the shaft.

[0009] In the above solution, there are two bionic oscillators, namely the first bionic oscillator and the second bionic oscillator, and the first bionic oscillator and the second bionic oscillator are distributed at a circumferential angle of 90°. Beneficial effects

[0010] 1. The present invention can utilize the turbulent kinetic energy of the downhole produced fluid itself to generate electricity. It can not only achieve power generation downhole, but also save the external motor and the power loss caused by long-distance downhole power transmission. In addition, the present invention adopts a multi-stage series connection design, and can change the number of power generation stages according to the fluid kinetic energy size and power generation requirements to achieve the most economical power generation effect, and will be widely recognized and applied in the power generation fields such as oil fields and new energy.

[0011] 2. The present invention adopts the downhole turbulent kinetic energy power generation method, and utilizes the fluid turbulent kinetic energy inside the oil well to impact the unique bionic oscillator to make the permanent magnet at the shaft end vibrate, so that the first coil cuts the magnetic induction line to generate electricity. The present invention can be directly lowered into the well to directly provide electrical energy for downhole equipment, which not only saves the electricity cost, but also reduces the cost equipment investment.

[0012] 3. The present invention innovates the internal structure of the pipeline, so that a part of the fluid pushes the ring magnet to make an axial reciprocating slide, so that the second coil and the third coil relatively cut the magnetic induction line to generate electricity to make full use of the fluid kinetic energy.

[0013] 4. The present invention has a wide range of applications. It adopts a multi-stage series connection design and can increase or decrease the corresponding power generation devices according to the power generation requirements.

[0014] 5. The present invention uses the bionic structure to make the shaft vibrate, integrates the functions of vibration power generation and fluid kinetic energy power generation, and adopts a multi-stage series connection structure to flexibly change the number of power generation stages to meet different power generation requirements. Description of the drawings

[0015] Figure 1 It is an external view of a downhole multi-stage turbulent vibration type magnetic power generation device.

[0016] Figure 2 It is an exploded view of the modules of a downhole multi-stage turbulent vibration type magnetic power generation device.

[0017] Figure 3 It is an overall cross-sectional view of a downhole multi-stage turbulent vibration type magnetic power generation device.

[0018] Figure 4 Explosion diagram of the installation and fixing module.

[0019] Figure 5 Appearance and sectional view of the permanent magnet holder.

[0020] Figure 6 Appearance and sectional view of the first outer tube.

[0021] Figure 7 Appearance and sectional view of the second outer tube.

[0022] Figure 8 Appearance and sectional view of the shaft end fixator.

[0023] Figure 9 Appearance view of the limiting spring.

[0024] Figure 10 Explosion diagram of the power generation module.

[0025] Figure 11 Appearance and sectional view of the first coil.

[0026] Figure 12 Appearance and sectional view of the first annular permanent magnet.

[0027] Figure 13 Appearance and sectional view of the bionic oscillator.

[0028] Figure 14 Appearance and sectional view of the second coil.

[0029] Figure 15 Shaft sectional view and partial enlarged view.

[0030] In the figure: 1 - Installation and fixing module, 101 - Permanent magnet fixer, 1011 - Permanent magnet fixing hole, 102 - Columnar permanent magnet, 103 - First outer tube, 1031 - First liquid inlet hole, 1032 - First liquid outlet hole, 1033 - First slideway, 104 - Second outer tube, 1041 - Second liquid inlet hole, 1042 - Second slideway, 1043 - Second liquid outlet hole, 105 - Shaft end fixer, 1051 - Shaft end fixing hole, 106 - Limiting spring, 1061 - Collar, 1062 - Hook, 2 - Power generation module, 201 - First-stage coil, 2011 - First-stage coil housing, 2012 - First-stage coil wire, 202 - First annular permanent magnet, 2021 - First annular permanent magnet cathode, 2022 - First annular permanent magnet anode, 2023 - First annular permanent magnet mounting hole, 203 - First bionic oscillator, 2031 - First bionic oscillator mounting hole, 204 - Second coil, 2041 - Second coil housing, 2042 - Second coil wire, 205 - Third coil, 206 - Shaft, 2061 - Limiting ring, 2062 - Bionic oscillator mounting hole, 207 - Second slideway end cap, 208 - Second spring, 209 - Second annular magnet, 210 - First slideway end cap, 211 - First spring, 212 - First annular magnet, 213 - Second bionic oscillator. Detailed implementation mode

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] Combined with Figures 1 - 15 As shown in the figure, this downhole multi-stage turbulent vibration type magnetic power generation device includes an installation and fixing module 1 and a power generation module 2. The power generation module 2 is arranged in the installation and fixing module 1. The installation and fixing module 1 can play a role in fixing, supporting and limiting the power generation module 2; the power generation module 2 can convert the kinetic energy of downhole liquid into the reciprocating motion of the permanent magnet in the horizontal and vertical directions through the bionic oscillator, so as to achieve the purpose of power generation in the process of continuously cutting the magnetic induction line. Several power generation modules can be connected in series or in parallel according to the power generation requirements and used downhole.

[0033] The installation and fixing module 1 includes a permanent magnet fixer 101, a columnar permanent magnet 102, a first outer tube 103, a second outer tube 104, a shaft end fixer 105 and a limiting spring 106.

[0034] The main structure inside the permanent magnet fixer 101 has a permanent magnet fixing hole 1011. The permanent magnet fixing hole 1011 is fixed to the columnar permanent magnet 102 by threads and is connected to the first outer tube 103 by threads outside; the columnar permanent magnet 102 is a columnar permanent magnet with threads on the outside, and it is connected to the permanent magnet fixing hole 1011 by threads.

[0035] The inner wall of the installation cylinder is provided with a first slideway 1033 and a second slideway 1042 at intervals. The first slideway 1033 and the second slideway 1042 are both jackets formed by the installation cylinder and the corresponding inner cylinder. Liquid inlet holes are provided at the bottoms of the first slideway 1033 and the second slideway 1042, and liquid outlet holes are provided on the inner walls of the first slideway and the second slideway.

[0036] In this embodiment, the installation cylinder is composed of a first outer tube 103 and a second outer tube 104 connected by threads. The first outer tube 103 is a cylindrical tube with both ends open. Its main internal structures include a first liquid inlet hole 1031, a first liquid outlet hole 1032, and a first slideway 1033. The first outer tube 103 is connected to the second outer tube 104 through external threads at both ends, and is connected to the permanent magnet holder 101 and the primary coil 201 through internal threads at one end. The second outer tube 104 is a cylindrical tube with both ends open, slightly shorter than the first outer tube 103. Its main internal structures include a second liquid inlet hole 1041, a second slideway 1042, and a second liquid outlet hole 1043. The second outer tube 104 is connected to the first outer tube 103 and the shaft end fixator 105 through internal threads at both ends. The first slideway is a jacket formed by the first outer cylinder and its inner cylinder. A first liquid inlet hole is provided at the bottom of the first slideway, and a first liquid outlet hole is provided on the inner wall of the first slideway. The second slideway is a jacket formed by the second outer cylinder and its inner cylinder. A second liquid inlet hole is provided at the bottom of the second slideway, and a second liquid outlet hole is provided on the inner wall of the second slideway. The first slideway end cover 210 is a ring with internal threads, which is connected to the first slideway 1033 and the second slideway 1042 through threads. Its main function is to facilitate the disassembly of the first spring 211 and the second spring 208.

[0037] The internal structure of the shaft end fixator 105 has a shaft end fixing hole 1051, and the shaft end fixing hole 1051 is connected to the shaft end through threads.

[0038] The limiting spring 106 is composed of a collar 1061 at the left end and a hook 1062 at the right end. The collar 1061 is directly sleeved on the shaft 206, and the hook 1062 at the right end is directly hooked on the inner wall of the first outer pipe.

[0039] The power generation module 2 includes a primary coil 201, a first annular permanent magnet 202, a first bionic oscillator 203, a second coil 204, a third coil 205, a shaft 206, a second slideway end cover 207, a second spring 208, a second annular magnet 209, a first slideway end cover 210, a first spring 211, a first annular magnet 212, and a second bionic oscillator.

[0040] Outside the primary coil 201 is a threaded primary coil housing 2011, and inside is the primary coil wire 2012. The primary coil 201 is connected to the first outer tube 103 through the external threads; the first annular permanent magnet 202 is composed of a first annular permanent magnet cathode 2021 and a first annular permanent magnet anode 2022. The first annular permanent magnet mounting hole 2023 inside it is connected to the shaft end through threads. The second coil 204 is composed of a second coil housing 2041 and the second coil wire 2042 inside. The second coil 204 is connected to the shaft through the internal threads.

[0041] The external shape of the first bionic oscillator 203 is the bionic structure of the dolphin's back, and the whole is streamlined. The two first bionic oscillator mounting holes 2031 inside it are connected to the shaft by screws. The first bionic oscillator and the second bionic oscillator are distributed at a circumferential angle of 90°.

[0042] The main structure of the shaft 206 includes a limit ring 2061 and a bionic oscillator mounting hole 2062. The material of the shaft 206 is an elastomer, which can increase the flexibility of the shaft. Its limit ring 2061 plays a role in restricting the position of the first annular permanent magnet 202; the bionic oscillator mounting hole 2062 is connected to the bionic oscillator by screws.

[0043] As Figure 1 shown, the present invention is used in a vertical working state underground, with the liquid flowing in from the bottom and out from the top. Figure 2 It is an exploded view of a downhole multi-stage turbulent vibration type magnetic power generation device module, mainly composed of an installation and fixation module 1 and a power generation module 2. An overall cross-sectional view of a downhole multi-stage turbulent vibration type magnetic power generation device is as Figure 3As shown in the figure, first, the liquid enters the device from below the first outer tube 103. When it flows through the bionic oscillator 203, a low-pressure area will be formed at the convex side due to the fast flow rate. Under the action of the fluid pressure, the shaft will shift towards the convex side, and then drive the first annular permanent magnet 202 at the shaft end to move to the left. At this time, the limiting spring 106 works and pulls the shaft 206 back in the opposite direction. Therefore, the generated vertical magnetic induction lines are cut by the first coil wire 2012, generating electricity. The columnar permanent magnet 102 is fixed on the permanent magnet holder 101. The columnar permanent magnet 102 is the anode and repels the first annular permanent magnet 202 to prevent the shaft from moving up and down. When the fluid reaches the middle position, a part of the fluid will push up the first annular magnet 212 in the first slideway 1033 through the first liquid inlet hole 1031, and the first spring 211 is compressed. This is the first upward stroke. When the lower surface of the first annular magnet 212 exceeds the first liquid outlet hole 1032, the fluid returns to the flow cavity of the first outer tube 103. At this time, the pressure in the first slideway 1033 decreases, the first spring 211 relaxes, and the first annular magnet 212 returns to the lowest position. This is the first downward stroke. In this way, the first annular magnet 212 slides up and down. At this time, the horizontal magnetic induction lines generated by the first annular magnet 212 will be cut back and forth by the second coil wire 2042 to generate current. Similarly, when the fluid reaches the position of the second outer tube 104, the second annular magnet 209 reciprocates up and down, and the wire cuts the magnetic induction lines to generate electricity.

[0044] Figure 4 Figure 4 is an exploded view of the installation and fixing module 1. The installation and fixing module 1 is mainly composed of parts such as a permanent magnet holder 101, a columnar permanent magnet 102, a first outer tube 103, a second outer tube 104, a shaft end holder 105, and a limiting spring 106. Figure 5 Figure 6 is the appearance and cross-sectional view of the permanent magnet holder. It is connected to the first outer tube 103 through an external thread. Its main purpose is to fix the columnar permanent magnet 102 and axially limit the shaft 206. Figure 6 Figure 8 is the appearance and cross-sectional view of the first outer tube 103. The left-end external thread is used to connect multiple stages of this power generation device, and the right-end external thread is used to connect the second outer tube 104. The fluid enters the first slideway 1033 through the first liquid inlet hole 1031, causing the first annular magnet 212 to slide in the first slideway 1033, and the fluid exits the first slideway 1033 from the first liquid outlet hole 1032. Figure 7 Figure 10 is the appearance and cross-sectional view of the second outer tube 104. Its left-end internal thread is used to connect the first outer tube 103, and the right-side internal thread is used to connect the shaft end holder 105. The fluid enters the second slideway 1042 through the second liquid inlet hole 1041, causing the second annular magnet 209 to slide in the second slideway 1042, and the fluid exits the second slideway 1042 from the second liquid outlet hole 1043. Figure 8It is the external view and sectional view of the shaft end fixator, which is connected to the second outer tube 104 through external threads. Its main purpose is to fix the shaft 206 through the shaft end fixing hole 1051 to axially fix the shaft 206. Figure 9 It is the external view of the limit spring 106. The collar 1061 at the left end of the limit spring 106 can be directly fixed on the shaft 206, and the hook 1062 at the right end is hung on the inner wall of the first outer tube 1032. Its function is to limit the shaft 206 to prevent the first annular permanent magnet 202 from colliding with the primary coil housing 2011.

[0045] Figure 10 It is the exploded view of the power generation module 2. The power generation module 2 is mainly composed of parts such as the primary coil 201, the first annular permanent magnet 202, the first bionic oscillator 203, the second coil 204, the third coil 205, the shaft 206, the second slideway end cover 207, the second spring 208, the second annular magnet 209, the first slideway end cover 210, the first spring 211, the first annular magnet 212 and the second bionic oscillator 213; the first bionic oscillator 203 and the second bionic oscillator 213 have the same structure and function; the second coil 204 and the third coil 205 have the same structure and function; the second slideway end cover 207 and the first slideway end cover 210 have the same structure and function; the second spring 208 and the first spring 211 have the same structure and function; the second annular magnet 209 and the first annular magnet 212 have the same structure and function;

[0046] Figure 11 It is the external view and sectional view of the first coil, which is composed of the first coil housing 2011 and the first coil wire 2012. The first coil housing 2011 is connected to the first outer tube 103 through external threads, and the first coil wire 2012 generates electricity by cutting the magnetic induction lines generated by the first annular permanent magnet 202. Figure 12 It is the external view and sectional view of the first annular permanent magnet 202, which is composed of the first annular permanent magnet cathode 2021 above and the first annular permanent magnet anode 2022 below. Therefore, the first annular permanent magnet 202 will generate magnetic induction lines perpendicular to the first coil wire 2012; the internal thread on the first annular permanent magnet mounting hole 2023 is connected and fixed to the external thread at the shaft end. Figure 13 It is the external view and sectional view of the first bionic oscillator 203. Its external contour is imitated from the back of a dolphin, and the overall shape is streamlined to reduce the resistance of the fluid flowing through. There are two threaded first bionic oscillator mounting holes 2031 inside, which are used to connect to the shaft 206. Figure 14 It is the external view and sectional view of the second coil 204, which is composed of the second coil housing 2041 and the second coil wire 2042 inside; the second coil housing 2041 is overall ellipsoidal to reduce the resistance of the fluid flowing through, and the second coil wire 2042 cuts the horizontal magnetic induction lines generated by the second annular magnet 209. The second coil 204 is fixed on the shaft 206 through the internal thread.Figure 15 It is a sectional view and a partially enlarged view of the shaft 206. There are multiple sections of threads on the shaft 206 for fixing other parts. The limiting ring 2061 can prevent the first annular permanent magnet 202 from axially shifting under the impact of the fluid. There are a total of four bionic oscillator mounting holes 2062, which are respectively connected to two bionic oscillators by screws.

[0047] The present invention designs a downhole multi-stage turbulent vibration type magnetic power generation device, which is a downhole power generation device that combines turbulent vibration and turbulent potential energy. It can be directly lowered into the well for power generation without an external power generation device, saving both electricity costs and reducing equipment investment. The present invention adopts a multi-stage series connection design, and the number of power generation stages can be changed according to the magnitude of fluid kinetic energy and power generation requirements to achieve the most economical power generation effect. It will be widely recognized and applied in the power generation fields such as oil fields and new energy.

Claims

1. An underground multi-stage turbulent vibration type magnetic power generation device, characterized in that: This downhole multi-stage turbulent vibration magnetic power generation device includes an installation and fixation module and a power generation module; the installation and fixation module includes an installation cylinder, a permanent magnet fixator, a columnar permanent magnet, and a shaft end fixator. The columnar permanent magnet is fixed to the lower end of the installation cylinder through the permanent magnet fixator. First and second slideways are arranged at intervals on the inner wall of the installation cylinder. The first and second slideways are both jackets formed by the installation cylinder and the corresponding inner cylinder. Liquid inlet holes are provided at the bottoms of the first and second slideways, and liquid outlet holes are provided on the inner walls of the first and second slideways; the power generation module is arranged in the installation cylinder and includes a shaft, a primary coil, a first annular permanent magnet, a bionic vibration exciter, a second coil, a first annular magnet, a third coil, and a second annular magnet. The shaft is vertically fixed at the center of the installation cylinder. The first annular permanent magnet, the bionic vibration exciter, the second coil, and the third coil are fixedly arranged on the shaft at intervals from bottom to top. The upper end of the shaft is fixed to the upper end of the installation cylinder through the shaft end fixator. The columnar permanent magnet is installed at the lower end of the shaft. The primary coil surrounds the periphery of the first annular permanent magnet. The first annular magnet and the first spring thereon are located in the first slideway. The first annular magnet surrounds the second coil. The second annular magnet and the second spring thereon are located in the second slideway. The second annular magnet surrounds the third coil; the external shape of the bionic vibration exciter is the structure of the back of a bionic dolphin, and the overall external shape is streamlined. The inside of the bionic vibration exciter is an arc surface that matches the shaft.

2. The downhole multi-stage turbulent vibration type magnetic power generation device according to claim 1, wherein: The installation cylinder is composed of a first outer pipe and a second outer pipe connected by threading. The first outer pipe is located at the lower end of the second outer pipe. The permanent magnet fixator is located inside the first outer pipe and is threadedly connected to the lower port of the first outer pipe. The columnar permanent magnet is coaxially fixed at the center of the permanent magnet fixator. The shaft end fixator is located in the second outer pipe and is threadedly connected to the upper port of the second outer pipe; the limiting spring is sleeved on the shaft through a collar at one end and directly hung on the fixing ring on the inner wall of the first outer pipe through a hook at the other end.

3. The downhole multi-stage turbulent vibration type magnetic power generation device according to claim 2, characterized in that: There are multiple threaded sections on the shaft. There are also limiting rings and bionic vibration exciter mounting holes on the shaft. The shaft is an elastic body. The limiting ring restricts the position of the first annular permanent magnet. The bionic vibration exciter mounting hole is connected to the bionic vibration exciter through a screw.

4. The downhole multi-stage turbulent vibration type magnetic power generation device according to claim 3, characterized in that: The primary coil includes a primary coil housing and primary coil wires. The primary coil housing has external threads and is threadedly connected to the first outer pipe; the first annular permanent magnet is composed of a first annular permanent magnet cathode and a first annular permanent magnet anode. The first annular permanent magnet mounting hole inside the first annular permanent magnet has internal threads, and the first annular permanent magnet is threadedly connected to the shaft end.

5. The downhole multi-stage turbulent vibration type magnetic power generation device according to claim 4, characterized in that:

6. The downhole multi-stage turbulent vibration type magnetic power generation device according to claim 5, characterized in that: The second coil is composed of a second coil housing and internal second coil wires. The second coil housing has internal threads and is threadedly connected to the shaft; the third coil is composed of a third coil housing and internal third coil wires. The third coil housing has internal threads and is threadedly connected to the shaft. There are two bionic vibration exciters, namely a first bionic vibration exciter and a second bionic vibration exciter, and the first bionic vibration exciter and the second bionic vibration exciter are distributed at a circumferential angle of 90°.

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