CN112855081B - Down-hole turbine piezoelectric hybrid power generation device - Google Patents
Down-hole turbine piezoelectric hybrid power generation device Download PDFInfo
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- CN112855081B CN112855081B CN202110202488.6A CN202110202488A CN112855081B CN 112855081 B CN112855081 B CN 112855081B CN 202110202488 A CN202110202488 A CN 202110202488A CN 112855081 B CN112855081 B CN 112855081B
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- 238000010248 power generation Methods 0.000 title claims abstract description 91
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 70
- 239000013013 elastic material Substances 0.000 claims description 33
- 239000011810 insulating material Substances 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 9
- 239000011247 coating layer Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
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- 229910001065 Chromium-vanadium steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0085—Adaptations of electric power generating means for use in boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/02—Adaptations for drilling wells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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Abstract
The invention discloses an underground turbine piezoelectric hybrid power generation device which comprises an upper drainage tube, a middle drainage tube, a lower drainage tube, a flow guide tube, a piezoelectric power generation mechanism and a turbine power generation mechanism, wherein the middle drainage tube is a conical tube; the water outlet end of the upper drainage tube is in fluid conduction connection with the flared end of the middle drainage tube, and the necking end of the middle drainage tube is in fluid conduction connection with the water inlet end of the lower drainage tube; the lower end of the flow guide pipe is arranged in the middle flow guide pipe, and the upper end of the flow guide pipe is positioned above the flared end of the middle flow guide pipe; the piezoelectric power generation mechanism is arranged on the inner wall of the middle drainage tube; the turbine power generation mechanism is arranged in the lower drainage pipe; the inner diameter of the upper drainage tube is D 1 The inner diameter of the lower drainage pipe is D 2 The inner diameter of the flow guide pipe is D 3 ，D 1 ＝1.2～2D 2 ，D2＝1～1.6D 3 . The invention combines the turbine generator and the piezoelectric generating mechanism, not only can provide power for the monitoring device, but also can continuously provide power for the monitoring device when the turbine generator breaks down.
Description
Technical Field
The invention relates to the technical field of downhole power supply for drilling. In particular to a downhole turbine piezoelectric hybrid power generation device.
Background
In the drilling engineering, the underground formation pressure can be monitored in real time by measuring the engineering parameters while drilling, and an operator adjusts the density of the drilling fluid and the borehole guidance according to the underground formation pressure, so that the drilling efficiency is improved. When engineering parameters are measured while drilling, the monitoring device needs to be powered while drilling, and people adopt a battery or an underground generator to supply power to the monitoring device. However, most of the existing underground generators are turbine generators, and once a turbine fails, the generator will supply power to be weakened or stop supplying power, so that the monitoring device cannot be supplied with power, and construction is suspended.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a downhole turbine piezoelectric hybrid power generation device, wherein a turbine generator and a piezoelectric power generation mechanism are used jointly, so that not only can power be supplied to a monitoring device, but also the power can be continuously supplied to the monitoring device when the turbine generator fails.
In order to solve the technical problems, the invention provides the following technical scheme:
the underground turbine piezoelectric hybrid power generation device comprises an upper drainage tube, a middle drainage tube, a lower drainage tube, a flow guide tube, a piezoelectric power generation mechanism and a turbine power generation mechanism, wherein the middle drainage tube is a conical tube; the water outlet end of the upper drainage tube is in fluid conduction connection with the flared end of the middle drainage tube, and the contracted end of the middle drainage tube is in fluid conduction connection with the water inlet end of the lower drainage tube; the lower end of the flow guide pipe is arranged in the middle flow guide pipe, and the upper end of the flow guide pipe is positioned above the flared end of the middle flow guide pipe; the piezoelectric power generation mechanism is arranged on the inner wall of the middle drainage tube; the turbine power generation mechanism is arranged in the lower drainage pipe; the inner diameter of the upper drainage tube is D 1 The inner diameter of the lower drainage tube is D 2 The inner diameter of the guide pipe is D 3 ，D 1 ＝1.2～2D 2 ，D2＝1～1.6D 3 。
According to the underground turbine piezoelectric hybrid power generation device, the piezoelectric power generation mechanism comprises a permanent magnet and a piezoelectric power generation module, and the piezoelectric power generation module comprises an elastic insulating material wrapping layer, a special-shaped piezoelectric ceramic core body and a spring; the permanent magnet blocks are embedded on the inner wall of the middle drainage pipe; one end of the spring is fixedly arranged on the inner wall of the middle drainage tube, and the other end of the spring is connected with the special-shaped piezoelectric ceramic core body; the elastic insulating material wrapping layer wraps the spring and the special-shaped piezoelectric ceramic core body; the special-shaped piezoelectric ceramic core body is electrically connected with the voltage stabilizing unit through a wire; when the special-shaped piezoelectric ceramic core body generates electric energy through vibration or swinging, one end of the special-shaped piezoelectric ceramic core body far away from the spring is not in contact with the outer wall of the flow guide pipe.
According to the underground turbine piezoelectric hybrid power generation device, the special-shaped piezoelectric ceramic core is a spiral core.
In the underground turbine piezoelectric hybrid power generation device, the flow guide pipe is detachably connected with the inner wall of the middle drainage pipe through the support plate and the clamping plate.
The downhole turbine piezoelectric hybrid power generation device comprises a turbine, a rotating shaft, a generator main body and a piezoelectric power generation auxiliary mechanism, wherein the turbine is in transmission connection with the generator main body through the rotating shaft, and the piezoelectric power generation auxiliary mechanism is arranged on the rotating shaft between the turbine and the generator main body; the piezoelectric power generation auxiliary mechanism comprises a shell, a permanent magnet, a spring piece, a piezoelectric ceramic vibrating piece, an elastic material piece and a shifting piece, wherein the permanent magnet is arranged on the inner wall of the shell, one end of the spring piece is fixedly connected with the inner wall of the shell, and the other end of the spring piece is fixedly connected with the piezoelectric ceramic vibrating piece; the elastic material sheet is arranged in a groove at one end of the piezoelectric ceramic vibrating piece far away from the spring piece; the shifting piece is arranged on the rotating shaft; when the rotating shaft rotates, the shell is static relative to the rotating shaft, the shifting piece is firstly contacted with the elastic material piece and applies acting force tangential to the circumferential direction of the rotating shaft to the elastic material piece, and after the shifting piece is separated from the elastic material piece, the piezoelectric ceramic vibrating piece vibrates and generates electric energy.
The underground turbine piezoelectric hybrid power generation device is characterized in that the spring piece is an arc-shaped spring piece, the radian of the arc-shaped spring piece is 3-10 degrees, and the length of the arc-shaped spring piece is L 1 The length of the piezoelectric ceramic vibrating piece is L 2 ，L 2 ＝0.8～1.7L 1 。
In the downhole turbine piezoelectric hybrid power generation device, each piezoelectric ceramic vibrating piece is fixedly connected with the inner wall of the shell through the two spring pieces with the opposite opening directions.
According to the underground turbine piezoelectric hybrid power generation device, the spring leaf is fixedly connected with the inner wall of the shell through the installation pipe and the semi-ring installation component, the semi-ring installation component is internally provided with the cable pipe, and the cable pipe is internally provided with the cable which is electrically connected with the piezoelectric ceramic vibration piece.
According to the underground turbine piezoelectric hybrid power generation device, the mounting pipe is detachably connected with the semi-ring mounting piece through the limiting arc-shaped plate arranged in the limiting groove in the inner wall of the semi-ring mounting member.
According to the underground turbine piezoelectric hybrid power generation device, the piezoelectric ceramic vibrating piece comprises an insulating material coating layer and a piezoelectric ceramic piece, and the piezoelectric ceramic piece is coated with the insulating material coating layer; the spring piece is fixedly connected with the piezoelectric ceramic vibrating piece through a toothed plate arranged in the insulating material coating layer; the elastic material sheet is a rubber sheet, and a spherical groove is formed in the elastic material sheet; the shifting piece in contact with the elastic material sheet is provided with a spherical crown-shaped bulge; when the shifting piece is contacted with the elastic material piece, the spherical crown protrusion is contacted with the bottom of the spherical groove.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the invention utilizes the clearance between the straight tube and the conical tube to construct a turbulent flow area, and the turbulent flow drives the piezoelectric power generation module in the piezoelectric power generation mechanism to vibrate at higher frequency and generate electric energy so as to provide a power supply for monitoring equipment. And the spring is used as a supporting structure of the piezoelectric power generation module, so that the piezoelectric power generation module can vibrate with larger amplitude. The probability of the piezoelectric ceramic body to vertically cut the magnetic induction line motion can be improved by utilizing the special-shaped piezoelectric ceramic core body (such as a star shape) to cut the magnetic induction line motion.
2. The invention adopts the poking piece to poke the piezoelectric ceramic vibrating piece to carry out high-frequency vibration and generate electric energy, and the turbine and the piezoelectric ceramic vibrating piece are separately arranged, so that the blocking effect of the turbine generator on fluid flow can be reduced.
Drawings
FIG. 1 is a schematic structural diagram of a downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 2 is a schematic view of an assembly structure of a turbine and a piezoelectric power generation auxiliary mechanism of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 3 is a schematic view of the mounting structure of a spring plate, a piezoelectric ceramic vibrating plate and an elastic material plate of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 4 is a schematic view of an assembly structure of a spring plate, a piezoelectric ceramic vibrating plate and an elastic material plate of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 5 is a schematic view of an assembly structure of a middle drainage tube and a piezoelectric power generation mechanism of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 6 is a schematic view of an assembly structure of a middle drainage tube and a flow guide tube of the downhole turbine piezoelectric hybrid power generation device;
FIG. 7 is a schematic structural diagram of a piezoelectric power generation module of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
FIG. 8 is a schematic structural diagram of a piezoelectric power generation section of a piezoelectric power generation module of the downhole turbine piezoelectric hybrid power generation device according to the present invention;
fig. 9 is a schematic structural diagram of a piezoelectric power generation module support section of the downhole turbine piezoelectric hybrid power generation device.
In the figure, 1-upper drainage tube; 2-middle drainage tube; 3-drainage tube; 4-a flow guide pipe; 5-vortex power generation mechanism, 5-1-turbine, 5-2-rotating shaft, 5-3-generator main body, 5-4-piezoelectric power generation auxiliary mechanism, 5-5-shell, 5-6-permanent magnet, 5-7-spring leaf, 5-8-piezoelectric ceramic vibration piece, 5-9-elastic material piece, 5-10-shifting piece, 5-11-semi-ring installation component, 5-12-cable pipe, 5-13-cable, 5-14-limit arc plate, 5-15-installation pipe, 5-16-insulating material coating layer and 5-17-toothed plate; 6-a support plate; 7-a clamping plate; 8-piezoelectric power generation module, 8-1-piezoelectric power generation module piezoelectric power generation section, 8-2-piezoelectric power generation module supporting section, 8-3-elastic insulating material wrapping layer, 8-4-special-shaped piezoelectric ceramic core body, 8-5-spring and 8-6-lead; 9-permanent magnet.
Detailed Description
As shown in figure 1, the underground turbine piezoelectric hybrid power generation device comprises an upper drainage tube 1, a middle drainage tube 2, a lower drainage tube 3, a flow guide tube 4 and piezoelectric power generationThe mechanism and the turbine power generation mechanism 5, the middle drainage tube 2 is a conical tube; the water outlet end of the upper drainage tube 1 is in fluid conduction connection with the flaring end of the middle drainage tube 2, and the necking end of the middle drainage tube 2 is in fluid conduction connection with the water inlet end of the lower drainage tube 3; the lower end of the draft tube 4 is arranged in the middle draft tube 2, and the upper end of the draft tube 4 is positioned above the flared end of the middle draft tube 2; the piezoelectric power generation mechanism is arranged on the inner wall of the middle drainage tube 2; the turbine power generation mechanism 5 is arranged in the lower drainage pipe 3; the inner diameter of the upper drainage tube 1 is D 1 The inner diameter of the lower drainage tube 3 is D 2 The inner diameter of the flow guide pipe 4 is D 3 ，D 1 ＝1.6D 2 ，D2＝1.3D 3 Therefore, the overall stability of the fluid formed by mixing the fluid flowing to the turbine power generation mechanism 5 through the flow guide pipe 4 and the fluid flowing to the turbine power generation mechanism 5 through the gap between the flow guide pipe 4 and the middle drainage pipe 2 is high, the turbine power generation mechanism 5 can generate power under the pushing of the fluid, and the piezoelectric power generation mechanism can generate power under the vibration of the turbulent flow.
As shown in fig. 5, 6, 8 and 9, the piezoelectric power generation mechanism includes a permanent magnet 9 and a piezoelectric power generation module 8, the piezoelectric power generation module 8 includes an elastic insulating material wrapping layer 8-3, a special-shaped piezoelectric ceramic core 8-4 and a spring 8-5, and the special-shaped piezoelectric ceramic core 8-4 is a spiral core with a star-shaped cross section; the special-shaped piezoelectric ceramic core body 8-4 and part of the elastic insulating material wrapping layer 8-3 form a piezoelectric power generation module piezoelectric power generation section 8-1, and the spring 8-5 and part of the elastic insulating material wrapping layer 8-3 form a piezoelectric power generation module supporting section 8-2; the permanent magnet block 9 is embedded on the inner wall of the middle drainage tube 2; one end of the spring 8-5 is fixedly arranged on the inner wall of the middle drainage tube 2, and the other end of the spring 8-5 is connected with the special-shaped piezoelectric ceramic core body 8-4; the elastic insulating material wrapping layer 8-3 wraps the spring 8-5 and the special-shaped piezoelectric ceramic core body 8-4; the special-shaped piezoelectric ceramic core body 8-4 is electrically connected with the voltage stabilizing unit through a wire 8-6; when the special-shaped piezoelectric ceramic core body 8-4 generates electric energy through vibration or swing, one end of the special-shaped piezoelectric ceramic core body 8-4 far away from the spring 8-5 is not in contact with the outer wall of the flow guide pipe 4.
In order to facilitate maintenance of the draft tube 4 and the middle draft tube 2, the draft tube 4 is detachably connected with the inner wall of the middle draft tube 2 through a support plate 6 and a clamping plate 7, as shown in fig. 1 and 7.
As shown in fig. 1, the turbine power generation mechanism 5 comprises a turbine 5-1, a rotating shaft 5-2, a generator main body 5-3 and a piezoelectric power generation auxiliary mechanism 5-4, wherein the turbine 5-1 is in transmission connection with the generator main body 5-3 through the rotating shaft 5-2, and the piezoelectric power generation auxiliary mechanism 5-4 is mounted on the rotating shaft 5-2 between the turbine 5-1 and the generator main body 5-3; as shown in fig. 2 to 4, the piezoelectric power generation auxiliary mechanism 5-4 comprises a shell 5-5, a permanent magnet 5-6, a spring piece 5-7, a piezoelectric ceramic vibrating piece 5-8, an elastic material piece 5-9 and a shifting piece 5-10, wherein the permanent magnet 5-6 is installed on the inner wall of the shell 5-5, one end of the spring piece 5-7 is fixedly connected with the inner wall of the shell 5-5, and the other end of the spring piece 5-7 is fixedly connected with the piezoelectric ceramic vibrating piece 5-8; the elastic material piece 5-9 is arranged in a groove at one end of the piezoelectric ceramic vibrating piece 5-8 far away from the spring piece 5-7; the shifting piece 5-10 is arranged on the rotating shaft 5-2; when the rotating shaft 5-2 rotates, the shell 5-5 is static relative to the rotating shaft 5-2, the poking piece 5-10 is firstly contacted with the elastic material piece 5-9 and applies an acting force tangential to the circumferential direction of the rotating shaft 5-2 to the elastic material piece 5-9, and after the poking piece 5-10 is separated from the elastic material piece 5-9, the piezoelectric ceramic vibrating piece 5-8 vibrates and generates electric energy. The spring piece 5-7 is an arc-shaped spring piece 5-7, the radian of the arc-shaped spring piece 5-7 is 4.7 degrees, and the length of the arc-shaped spring piece 5-7 is L 1 The length of the piezoelectric ceramic vibrating piece is 5-8L 2 ，L 2 ＝1.7L 1 . Each piezoelectric ceramic vibration piece 5-8 is fixedly connected with the inner wall of the shell 5-5 through two spring pieces 5-7 with openings opposite in direction, the spring pieces 5-7 are fixedly connected with the inner wall of the shell 5-5 through installation pipes 5-15 and semi-ring installation members 5-11, cable pipes 5-12 are arranged in the semi-ring installation members 5-11, and the piezoelectric ceramic vibration pieces 5-8 are electrically connected with each other in the cable pipes 5-12A cable 5-13 connected, and the mounting pipe 5-15 is detachably connected with the half-ring mounting member through a limiting arc plate 5-14 arranged in a limiting groove on the inner wall of the half-ring mounting member 5-11. The spring pieces 5-7 with the opposite opening directions can enable the piezoelectric ceramic vibrating pieces 5-8 to move to the static position relatively quickly in the vibrating process, so that the piezoelectric ceramic vibrating pieces 5-8 can vibrate at high frequency after being stirred, and the elastic material pieces 5-9 can enable the stirring pieces 5-10 to act on the piezoelectric ceramic vibrating pieces 5-8 at a distance and time, so that the maximum amplitude of the piezoelectric ceramic vibrating pieces 5-8 can be improved, the single maximum distance of the piezoelectric ceramic vibrating pieces 5-8 in cutting magnetic induction line motion can be further improved, and the electric quantity generated by the piezoelectric ceramic vibrating pieces 5-8 can be improved. In this embodiment, the spring pieces 5 to 7 are arc spring pieces 5 to 7 made of chrome vanadium steel.
As shown in fig. 3 and 4, the piezoelectric ceramic vibrating plate 5-8 comprises an insulating material coating 5-16 and a piezoelectric ceramic plate, wherein the insulating material coating 5-16 is coated on the piezoelectric ceramic plate; the spring piece 5-7 is fixedly connected with the piezoelectric ceramic vibrating piece 5-8 through a toothed plate 5-17 arranged in the insulating material coating layer 5-16; the elastic material pieces 5-9 are rubber pieces, and spherical grooves are formed in the elastic material pieces 5-9; the poking piece 5-10 in contact with the elastic material piece 5-9 is provided with a spherical crown-shaped bulge; when the poking piece 5-10 is contacted with the elastic material piece 5-9, the spherical crown bulge is contacted with the bottom of the spherical groove. The spherical groove is in contact with the spherical crown-shaped bulge, so that the piezoelectric ceramic vibrating piece 5-8 can be prevented from rotating around the direction vertical to the rotating shaft 5-2 when the poking piece 5-10 pokes the piezoelectric ceramic vibrating piece 5-8, the poking piece 5-10 can ensure that the piezoelectric ceramic vibrating piece 5-8 can start to vibrate with larger amplitude, the friction force between the poking piece 5-10 and the elastic material piece 5-9 can be improved, the acting time of the poking piece 5-10 on the elastic material piece 5-9 is prolonged, the initial amplitude of the piezoelectric ceramic piece is further improved, and the electric energy generated by the piezoelectric ceramic vibrating piece 5-8 after being poked for a single time is improved.
When monitoring while drilling is carried out, the situation that the electric energy of a power supply is insufficient or a turbine generator breaks down is often encountered, the power supply is supplied to the monitoring while drilling device by only depending on a battery and the turbine generator, shutdown maintenance is possibly required in the critical drilling period, and then great influence is brought to drilling construction. The turbine generator and the piezoelectric generating mechanism are independently arranged, so that the faults of the two generating mechanisms cannot be influenced mutually, the same fluid can be used for generating electricity, the rechargeable battery is connected with the voltage stabilizing charging chip, and redundant electric energy is stored in the rechargeable battery for later use, so that the power supply capacity of the monitoring device while drilling is improved, the time of continuous drilling construction is prolonged, and the construction efficiency is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (9)
1. The underground turbine piezoelectric hybrid power generation device is characterized by comprising an upper drainage tube (1), a middle drainage tube (2), a lower drainage tube (3), a flow guide tube (4), a piezoelectric power generation mechanism and a turbine power generation mechanism (5), wherein the middle drainage tube (2) is a conical tube; the water outlet end of the upper drainage tube (1) is in fluid conduction connection with the flaring end of the middle drainage tube (2), and the necking end of the middle drainage tube (2) is in fluid conduction connection with the water inlet end of the lower drainage tube (3); the lower end of the draft tube (4) is arranged in the middle draft tube (2), and the upper end of the draft tube (4) is positioned above the flared end of the middle draft tube (2); the piezoelectric power generation mechanism is arranged on the inner wall of the middle drainage tube (2); the turbine power generation mechanism (5) is arranged in the lower drainage pipe (3); the inner diameter of the upper drainage tube (1) is D 1 The inner diameter of the lower drainage tube (3) is D 2 The inner diameter of the flow guide pipe (4) is D 3 ，D 1 ＝1.2～2D 2 ，D2＝1～1.6D 3 (ii) a The piezoelectric power generation mechanism comprises a permanent magnet (9) andthe piezoelectric power generation module (8) comprises an elastic insulating material wrapping layer (8-3), a special-shaped piezoelectric ceramic core body (8-4) and a spring (8-5); the permanent magnet block (9) is embedded on the inner wall of the middle drainage tube (2); one end of the spring (8-5) is fixedly arranged on the inner wall of the middle drainage tube (2), and the other end of the spring (8-5) is connected with the special-shaped piezoelectric ceramic core body (8-4); the elastic insulating material wrapping layer (8-3) wraps the spring (8-5) and the special-shaped piezoelectric ceramic core body (8-4); the special-shaped piezoelectric ceramic core body (8-4) is electrically connected with the voltage stabilizing unit through a lead (8-6); when the special-shaped piezoelectric ceramic core body (8-4) generates electric energy through vibration or swing, one end of the special-shaped piezoelectric ceramic core body (8-4) far away from the spring (8-5) is not in contact with the outer wall of the flow guide pipe (4).
2. The downhole turbine piezoelectric hybrid power generation device according to claim 1, wherein the profiled piezoelectric ceramic core (8-4) is a helical core.
3. The downhole turbine piezoelectric hybrid power generation device according to claim 1, wherein the draft tube (4) is detachably connected with the inner wall of the middle draft tube (2) through a support plate (6) and a clamping plate (7).
4. The downhole turbine piezoelectric hybrid power generation device according to any one of claims 1 to 3, wherein the turbine power generation mechanism (5) comprises a turbine (5-1), a rotating shaft (5-2), a generator main body (5-3) and a piezoelectric power generation auxiliary mechanism (5-4), the turbine (5-1) is in transmission connection with the generator main body (5-3) through the rotating shaft (5-2), and the piezoelectric power generation auxiliary mechanism (5-4) is mounted on the rotating shaft (5-2) between the turbine (5-1) and the generator main body (5-3); the piezoelectric power generation auxiliary mechanism (5-4) comprises a shell (5-5), a permanent magnet (5-6), a spring piece (5-7), a piezoelectric ceramic vibrating piece (5-8), an elastic material piece (5-9) and a shifting piece (5-10), wherein the permanent magnet (5-6) is installed on the inner wall of the shell (5-5), one end of the spring piece (5-7) is fixedly connected with the inner wall of the shell (5-5), and the other end of the spring piece (5-7) is fixedly connected with the piezoelectric ceramic vibrating piece (5-8); the elastic material piece (5-9) is arranged in a groove at one end of the piezoelectric ceramic vibrating piece (5-8) far away from the spring piece (5-7); the shifting piece (5-10) is arranged on the rotating shaft (5-2); when the rotating shaft (5-2) rotates, the shell (5-5) is static relative to the rotating shaft (5-2), the poking piece (5-10) is firstly contacted with the elastic material piece (5-9) and applies acting force tangential to the circumferential direction of the rotating shaft (5-2) to the elastic material piece (5-9), and after the poking piece (5-10) is separated from the elastic material piece (5-9), the piezoelectric ceramic vibrating piece (5-8) vibrates and generates electric energy.
5. The downhole turbine piezoelectric hybrid power generation device according to claim 4, wherein the spring pieces (5-7) are arc-shaped spring pieces, the radian of the arc-shaped spring pieces is 3-10 degrees, and the length of the arc-shaped spring pieces is L 1 The length of the piezoelectric ceramic vibration piece (5-8) is L 2 ，L 2 ＝0.8～1.7L 1 。
6. The downhole turbine piezoelectric hybrid power generation device according to claim 5, wherein each piezoelectric ceramic vibrating piece (5-8) is fixedly connected with the inner wall of the casing (5-5) through two spring pieces (5-7) with openings facing away from each other.
7. The downhole turbine piezoelectric hybrid power generation device according to claim 6, wherein the spring plate (5-7) is fixedly connected with the inner wall of the casing (5-5) through a mounting pipe (5-15) and a semi-ring mounting member (5-11), a cable pipe (5-12) is arranged in the semi-ring mounting member (5-11), and a cable (5-13) electrically connected with the piezoceramic vibrating plate (5-8) is arranged in the cable pipe (5-12).
8. The downhole turbine-piezoelectric hybrid power plant according to claim 7, wherein the mounting pipe (5-15) is detachably connected to the half-ring mount by means of a limiting arc (5-14) arranged in a limiting groove on the inner wall of the half-ring mounting member (5-11).
9. The downhole turbine-piezoelectric hybrid power generation device according to claim 8, wherein the piezoceramic vibrating pieces (5-8) comprise an insulating material coating layer (5-16) and piezoceramic pieces, and the insulating material coating layer (5-16) is coated on the piezoceramic pieces; the spring piece (5-7) is fixedly connected with the piezoelectric ceramic vibrating piece (5-8) through a toothed plate (5-17) arranged in the insulating material coating layer (5-16); the elastic material pieces (5-9) are rubber pieces, and spherical grooves are formed in the elastic material pieces (5-9); the poking piece (5-10) in contact with the elastic material piece (5-9) is provided with a spherical crown-shaped bulge; when the poking piece (5-10) is contacted with the elastic material piece (5-9), the spherical crown protrusion is contacted with the spherical groove bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110202488.6A CN112855081B (en) | 2021-02-23 | 2021-02-23 | Down-hole turbine piezoelectric hybrid power generation device |
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