An underground coal mine wind power generation device

Abstract

The present application relates to a kind of coal mine underground wind power generation device, including wind energy capture module installed in positive pressure pipeline, wind energy capture module includes wind wheel cylinder and adjusting motor installed in wind wheel cylinder, adjusting motor is driven by bevel gear drive and spline drive respectively multiple uniform distribution blade unit, so that the blade of each blade unit can be synchronized from wind wheel cylinder and retract, and while retracting, it can also adjust the pitch angle of blade itself, and the impact force of different density airflow on blade is detected by setting pressure sensor on blade, when pressure increases, adjusting blade to reduce pitch angle and shorten the length of extension synchronously, so as to avoid that blade is forced too large, protect the safety of blade, improve life, when pressure reduces, make the pitch angle of blade reduce and increase the length of extension, so as to have greater capture area and higher efficient pitch angle.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal mine wind power generation device. BACKGROUND

[0002] In coal mine, the power supply mode mainly exists following problem: existing coal mine power supply mainly relies on ground diesel generator or uphole power grid power supply, there is transmission loss big (line loss rate>8%), construction cost is high (because mine is deep, long distance cable laying cost accounts for more than 30% of total project cost), set up anti-explosion socket or cable branch box in coal mine, increase electrical spark risk (statistical display 30% of underground fire is caused by electrical failure) and other problems.

[0003] Although there is a wind power generation attempt in the prior art in the underground, but it generally adopts the design of fixed pitch angle and fixed length, and the airflow composition in the positive pressure pipeline is complex, mainly including air flow and small droplets, and the distribution of small droplets in the air flow is uneven, which is mainly because the positive pressure pipeline is distributed in deep mine, and the temperature changes greatly at different depths of the mine, and the condensation of water in the air is different at each place, plus some areas may have damage, sealing failure and other conditions, which will also mix some moisture in the mine, so that the composition of the airflow in the positive pressure pipeline is complex, the water density is uneven and the distribution is uneven, and the uneven distribution of small liquid in the airflow will produce different momentum on the blades of the wind turbine, for example, when the content of small droplets in the airflow is high, the kinetic energy received by the blade is larger, which is in overload operation state, otherwise, the impact on the blade is smaller, which is in low-efficiency working state, and the wind catching efficiency is lower, and the frequent impact of different momentum on the blade will cause the blade to vibrate and stress concentration, thereby affecting the service life of the blade. SUMMARY

[0004] The purpose of the present application is to provide a kind of coal mine wind power generation device, which changes the pitch angle and wind catching working area of each blade by sensing the change of pressure on the blade caused by the change of water mist content in airflow, so that the blade is in the set bearing range and the working state of efficient power generation, and the service life of the blade is longer.

[0005] The technical solution of the present application is as follows: a kind of coal mine wind power generation device includes:

[0006] The wind energy capturing module comprises a wind wheel cylinder with an axis collinear with an axis of the positive pressure pipeline, one end of the wind wheel cylinder facing the airflow direction is provided with a guide cone, the other end of the wind wheel cylinder away from the airflow direction is used for fixed connection with a main shaft of the mechanical transmission module, an adjusting motor is arranged in the guide cone, an output shaft of the adjusting motor is connected with a driving bevel gear, an axis of the driving bevel gear is collinear with the axis of the wind wheel cylinder, a plurality of blade units are uniformly distributed in a radial direction of the wind wheel cylinder, the blade unit comprises a driven bevel gear, an adjusting rod, a fixed nut, a blade and a follow-up turntable, the driven bevel gear comprises a tooth end and a shaft end, the tooth end is engaged with the driving bevel gear for transmission, the shaft end is provided with a spline tooth, one end of the adjusting rod is fixedly connected with the blade, the other end of the adjusting rod is provided with a spline hole matched with the spline tooth, a depth of the spline hole is greater than a length of the spline tooth, the shaft end is axially slidably connected with the adjusting rod through the cooperation of the spline tooth and the spline hole, the fixed nut is fixed relative to the wind wheel cylinder, a middle part of the adjusting rod is screwedly connected with an inner threaded hole of the fixed nut, and the follow-up turntable is rotatably arranged on a corresponding side wall of the wind wheel cylinder and provided with a through hole for the corresponding blade to pass through.

[0007] A pressure sensor is fixed on the blade to detect the pressure of the airflow on the blade, when the pressure increases, the adjusting motor is driven to rotate the adjusting rod to reduce the length of the blade extending from the follow-up turntable and increase the pitch angle of the blade; when the pressure on the blade decreases, the length of the blade extending from the follow-up turntable increases and the pitch angle of the blade decreases.

[0008] On the basis of the above scheme, further improvements are as follows:

[0009] A humidity sensor is arranged on an inner wall of the positive pressure pipeline to detect the moisture content in the positive pressure pipeline.

[0010] A controller is electrically connected with the humidity sensor, the pressure sensor and the adjusting motor to calculate the moisture content in the airflow according to the feedback of the sensors and control the rotation of the adjusting motor. Through the arrangement of the humidity sensor, the humidity sensor and the pressure sensor arranged on the blade can work together and complement each other to ensure the accuracy of detection, so that the adjustment of the extending length and the pitch angle of the blade is more scientific and reasonable.

[0011] On the basis of the above scheme, further improvements are as follows: an installation circular hole is arranged on the wind wheel cylinder corresponding to the follow-up turntable, and the follow-up turntable and the installation circular hole are axially blocked and circumferentially rotatably and slidably matched through an annular groove and an annular boss. Through the cooperation of the annular groove and the annular boss between the follow-up turntable and the installation circular hole, the extension and rotation of the blade can be better matched, the wind wheel cylinder can be sealed as much as possible under the premise of not affecting the rotation and extension of the blade, external oil mist and dust-containing water droplets can be prevented from entering the wind wheel cylinder, and the follow-up turntable will not be detached from the inner wall of the wind wheel cylinder.

[0012] On the basis of the above scheme, further improved as follows, the inner wall of the through hole of the follow-up rotating disc is connected with dustproof bristles or elastic sealing ring. The setting of the dustproof bristles and the elastic sealing ring can seal the gap between the blade and the through hole, and reduce the water mist in the airflow into the wind wheel cylinder as much as possible. At the same time, the dustproof bristles and the elastic sealing ring are tightly attached to the outer surface of the blade, which can also remove the water droplets adhered to the surface of the blade during the process of retracting the blade into the wind wheel cylinder.

[0013] On the basis of the above scheme, further improved as follows, the blade unit has three, and the cross section of the wind wheel cylinder is a regular hexagon. Such setting makes the follow-up rotating disc can be embedded in the wind wheel cylinder in parallel with the surface of the wind wheel cylinder, which is more convenient to install.

[0014] On the basis of the above scheme, further improved as follows, including a mechanical transmission module arranged in the positive pressure pipeline, the mechanical transmission module includes a main shaft and a gear box, and the gear box is fixed in the positive pressure pipeline through a plurality of support rods uniformly distributed in the circumference.

[0015] On the basis of the above scheme, further improved as follows, the positive pressure pipeline includes a plurality of pipeline units and a joint pipe connected between adjacent two pipeline units, and the wind energy capturing module and the mechanical transmission module are arranged in the joint pipe. The wind energy capturing module and the mechanical transmission module are arranged in the joint pipe, which can complete the assembly of the joint pipe and the two modules in the factory in advance, and then hoist the whole to connect with the adjacent pipeline unit, so that the installation process in the well is convenient, fast and efficient.

[0016] On the basis of the above scheme, further improved as follows, including a power generation and power processing module arranged outside the positive pressure pipeline, the power generation and power processing module includes a generator and a rectifier and inverter device.

[0017] The beneficial effects of the present application: when the air flow in the positive pressure pipeline impacts on the blades, the pressure sensor installed on the blade detects the pressure on the blade, when the pressure exceeds the set threshold value, for example, when the concentration of water mist in the air flow increases, the overall density and momentum of the air flow increase, the pressure exerted on the pressure sensor increases, after processing by the controller, the adjusting motor is controlled to rotate, the adjusting motor drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gears of the plurality of blade units meshing with it to rotate, the shaft end of the driven bevel gear is matched with the spline hole of the corresponding end of the adjusting rod through the spline teeth, and the adjusting rod is rotated. Since the adjusting rod is threadedly matched with the fixed nut, the fixed nut is fixed relative to the wind turbine barrel, and the adjusting rod and the driven bevel gear are matched through the long spline hole and the short spline teeth, the circumferential abutment and the axial sliding fit can be achieved, and the adjusting rod can have axial freedom relative to the driven bevel gear. Under the reaction force of the fixed nut on the adjusting rod, the adjusting rod moves relative to the fixed nut towards the side of the driven bevel gear, drives the blade to rotate to increase the pitch angle and axially moves to retract into the wind turbine barrel, that is, simultaneously increases the pitch angle of each blade and simultaneously reduces the extension length of each blade from the wind turbine barrel, to reduce the impact force on the blade, protect the safety of the blade unit, and improve the service life of the blade unit. When the pressure on the blade decreases, for example, when the concentration of water mist in the air flow decreases, the overall density and momentum of the air flow decrease, and the pressure on the pressure sensor also decreases. At this time, the adjusting motor reversely rotates, drives the driving bevel gear and the driven bevel gears of the corresponding blade units to reversely rotate, drives the adjusting rods to reversely rotate, so that the adjusting rods drive the blades to axially move out of the wind turbine barrel, increase the extension length of the blades to increase the windward area, and the adjusting rods rotate and extend outwards, and rotate towards the direction in which the pitch angle is reduced, to increase the wind catching efficiency and ensure high power generation efficiency. From the above process, it can be seen that the present application can directly detect the pressure of the air flow on the blade through the pressure sensor arranged on the blade, and then control the synchronous rotation and contraction of the blade, realize the synchronous adjustment of the pitch angle and the extension length of the blade, adapt to the change of the pressure caused by the change of the concentration of water mist in the air flow in the positive pressure pipeline, and make the blade work in the highest efficiency and within the designed bearing capacity range at all times, which ensures high efficiency power generation and long service life of the blade. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of embodiment 1 of a coal mine underground wind power generation device (axial section of the positive pressure pipeline);

[0019] Figure 2 FIG. 2 is a structural schematic view of embodiment 2 of a coal mine underground wind power generation device (axial section of the positive pressure pipeline); Figure 1 FIG. 3 is an enlarged view of part A in FIG. 2;

[0020] Figure 3 FIG. 4 is a structural schematic view of embodiment 3 of a coal mine underground wind power generation device (axial section of the positive pressure pipeline);Figure 1 Structure diagram of the embodiment 1 of the application (cross section along the axis of the vertical pressure pipeline);

[0021] Figure 4 For Figure 3 Enlarged view of the middle B;

[0022] Figure 5 For front view of the follow-up turntable;

[0023] Figure 6 For Figure 3 Enlarged view of the middle C;

[0024] Figure 7 For Figure 6 Cross section view of the middle spline tooth and spline hole cooperation;

[0025] Figure 8 Structure diagram of the embodiment 2 of the coal mine underground wind power generation device of the application (cross section along the axis of the vertical pressure pipeline);

[0026] Figure 9 For Figure 8 Structure diagram of the embodiment 1 of the application (cross section along the axis of the vertical pressure pipeline);

[0027] In the figure: 1-Pressure pipeline, 11-Pipeline unit, 12-Joint pipe, 13-Flange plate, 2-Humidity sensor, 3-Smoke sensor, 4-Mechanical transmission module, 41-Main shaft, 42-Supporting rod, 5-Cable, 6-Wind wheel cylinder, 61-Director cover, 62-Mounting round hole, 621-Ring groove, 7-Adjusting motor, 8-Driving bevel gear, 9-Blade unit, 91-Blade, 911-Pressure sensor, 92-Following bevel gear, 921-Tooth end, 922-Axis end, 9221-Spline tooth, 93-Adjusting rod, 931-Spline hole, 932-Screw segment, 94-Fixing nut, 95-Follow-up turntable, 951-Ring boss, 952-Through long hole, 953-Elastic sealing ring, 96-Positioning sleeve. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application, and are not used to limit the application, that is, the described examples are only a part of the examples of the application, but not all the examples. The components of the application embodiments generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obtained by one skilled in the art from a consideration of the disclosure of the application are intended to be within the scope of the application.

[0030] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0031] The features and benefits of the present application are further described herein below with respect to the following embodiments.

[0032] Embodiment 1 of a coal mine underground wind power generation device of the present application: as shown in Figure 1 , 3 The coal mine underground wind power generation device is installed in the positive pressure pipeline 1 in the coal mine and is coaxially installed with the positive pressure pipeline 1. Moisture enters the positive pressure pipeline due to local damage or sealing failure, or water mist or small droplets are condensed in the airflow of the positive pressure pipeline due to different temperature zones in the mine. Part of the water mist or small droplets will flow with the high-speed airflow. Due to the uneven distribution of the water mist in the airflow, the impact force on the blades will also be uneven. The coal mine underground wind power generation device mainly includes a wind energy capture module, a pressure sensor 911, a humidity sensor 2, a smoke sensor 3, a controller, a mechanical transmission module 4, and a power generation and power processing module.

[0033] As shown in Figure 1 , 3As shown, the wind energy capturing module comprises a wind rotor cylinder 6 with its axis collinear with the axis of the positive pressure pipeline 1, one end of the wind rotor cylinder 6 facing the airflow direction is provided with a fairing 61, the other end of the wind rotor cylinder 6 facing away from the airflow direction is used for fixed connection with the main shaft 41 of the mechanical transmission module 4, the fairing 61 is provided with an adjusting motor 7, an output shaft of the adjusting motor 7 is connected with a driving bevel gear 8, an axis of the driving bevel gear 8 is collinear with the axis of the wind rotor cylinder 6, a plurality of blade units 9 are uniformly distributed in a radial direction of the wind rotor cylinder 6, the blade unit 9 comprises a driven bevel gear 92, an adjusting rod 93, a fixing nut 94, a blade 91 and a follow-up turntable 95, the driven bevel gear 92 comprises a tooth end 921 and a shaft end 922, the tooth end 921 is engaged with the driving bevel gear 8 for transmission, the shaft end 922 is provided with a spline tooth 9221, one end of the adjusting rod 93 is fixedly connected with the blade 91, the other end of the adjusting rod 93 is provided with a spline hole 931 matched with the spline tooth 9221, a depth of the spline hole 931 is greater than a length of the spline tooth 9221, the shaft end 922 and the adjusting rod 93 are circumferentially rotationally stopped and axially slidably matched through cooperation of the spline tooth 9221 and the spline hole 931, the fixing nut 94 is fixed relative to the wind rotor cylinder 6, a middle part of the adjusting rod 93 is provided with a threaded section 932 which is screwingly matched with an internal threaded hole of the fixing nut 94, the follow-up turntable 95 is rotationally assembled on a corresponding side wall of the wind rotor cylinder 6, the follow-up turntable 95 is provided with a through hole 952 for the corresponding blade 91 to pass through. In the embodiment, outer surfaces of each component of the blade unit are coated with an explosion-proof brass plating layer, the brass (Cu-Zn alloy) has high ductility and low hardness characteristics, and impact energy is absorbed through plastic deformation when the gears are engaged. In other embodiments, a non-metallic polymer coating layer, such as polyether ether ketone (PEEK) or ultra-high molecular weight polyethylene (UHMWPE), can be coated on the surface of each component of the blade unit to absorb impact through elastic deformation.

[0034] In the embodiment, the wind rotor cylinder 6 is provided with a mounting circular hole 62 corresponding to the follow-up turntable 95, the follow-up turntable 95 is rotationally assembled in the mounting circular hole 62, and the follow-up turntable 95 is provided with the through hole 952 for the corresponding blade 91 to pass through. Figure 4As shown, the follow-up turntable 95 and the mounting circular hole 62 are axially blocked and circumferentially rotationally slidably matched through the annular groove 621 and the annular boss 951. The follow-up turntable 95 and the mounting circular hole 62 are matched through the annular groove 621 and the annular boss 951, which can better adapt to the expansion and rotation of the blade 91, ensure that the wind turbine barrel 6 is sealed as much as possible under the premise of not affecting the rotation and expansion of the blade 91, avoid external oil mist and dust-containing water droplets from entering the wind turbine barrel 6, and the follow-up turntable 95 will not be detached from the inner wall of the wind turbine barrel 6. The inner wall of the through long hole 952 of the follow-up turntable 95 is connected with dust-proof bristles or elastic sealing rings 953. The arrangement of the dust-proof bristles and the elastic sealing rings 953 can also seal the gap between the blade 91 and the through long hole 952, and reduce the dust-containing water mist and oil mist in the airflow as much as possible. At the same time, the dust-proof bristles and the elastic sealing rings 953 can also remove a part of the water, dust and oil mist adhered to the surface of the blade 91 during the process of the blade 91 being retracted into the wind turbine barrel 6. The dense multi-layer bristles are used to improve the sealing effect, and the elastic sealing ring is made of high-elasticity and high-deformation material to improve the sealing performance.

[0035] In this embodiment, as shown in the figure, Figure 3 The blade unit 9 has three, and the cross section of the wind turbine barrel 6 is a regular hexagon. Such arrangement makes the follow-up turntable 95 embedded in the wind turbine barrel 6 in parallel with the surface of the wind turbine barrel 6, which is more convenient for installation.

[0036] The mechanical transmission module 4 is arranged in the positive pressure pipeline 1, and the mechanical transmission module 4 includes a main shaft 41 and a gear box. The power generation and power processing module is arranged outside the positive pressure pipeline 1, including a generator and a rectifier-inverter device. The humidity sensor 2 is installed on the inner wall of the positive pressure pipeline 1 to detect the moisture content in the positive pressure pipeline 1; the smoke sensor 3 is installed on the inner wall of the positive pressure pipeline 1 to detect the oil mist content in the positive pressure pipeline 1; the controller is electrically connected with the humidity sensor 2, the smoke sensor 3, the pressure sensor 911 and the adjusting motor 7 to calculate the water and oil content in the airflow according to the feedback of the above sensors, and then control the rotation of the adjusting motor 7. Through the arrangement of the humidity sensor 2 and the smoke sensor 3, the pressure sensor 911 arranged on the blade 91 can work together and complement each other to ensure the accuracy of detection, so that the extension length and the pitch angle of the blade 91 are adjusted more scientifically and reasonably.

[0037] When the airflow in the positive pressure pipeline 1 impacts on the blade 91 during use of the coal mine underground wind power generation device, the pressure sensor 911 installed on the blade 91 detects the pressure borne by the blade 91, and when the pressure exceeds a set threshold value, for example, when the concentration of water mist in the airflow increases, the overall density and momentum of the airflow increase, and the pressure exerted on the pressure sensor 911 increases. After processing by the controller, the control adjustment motor 7 is rotated, the adjustment motor 7 drives the driving bevel gear 8 to rotate, the driving bevel gear 8 drives the driven bevel gear 92 of the plurality of blade units 9 meshing with it to rotate, the shaft end 922 of the driven bevel gear 92 is matched with the key hole 931 of the corresponding end of the adjustment rod 93 through the spline tooth 9221, and the adjustment rod 93 is rotated. Since the adjustment rod 93 is also matched with the fixed nut 94 through the threaded section 932, the fixed nut 94 is fixed relative to the wind wheel cylinder 6, and the adjustment rod 93 and the driven bevel gear 92 are matched through the long key hole 931 and the short spline tooth 9221, the circumferential abutting and axial sliding matching can be realized, and the adjustment rod 93 can have axial freedom relative to the driven bevel gear 92. Under the reaction force of the fixed nut 94 to the adjustment rod 93, the adjustment rod 93 moves relative to the fixed nut 94 towards one side of the driven bevel gear 92, drives the blade 91 to rotate to increase the pitch angle and axially moves towards the wind wheel cylinder 6 to retract, that is, simultaneously increases the pitch angle of each blade 91 and simultaneously reduces the extension length of each blade 91 from the wind wheel cylinder 6, to reduce the impact force borne by the blade 91, protect the safety of the blade unit 9, and improve the service life of the blade unit 9. When the pressure borne by the blade 91 decreases, for example, when the concentration of water mist in the airflow decreases, the overall density and momentum of the airflow decrease, and the pressure borne by the pressure sensor 911 also decreases. At this time, the adjustment motor 7 is reversely rotated, drives the driving bevel gear 8 and the driven bevel gear 92 of the corresponding each blade unit 9 to reversely rotate, drives each adjustment rod 93 to reversely rotate, so that the adjustment rod 93 drives the blade 91 to axially move out of the wind wheel cylinder 6, increases the extension length of the blade 91 to increase the windward area, and the adjustment rod 93 rotates while extending out, and rotates towards the direction in which the pitch angle is reduced, to increase the wind catching efficiency and ensure high power generation efficiency. From the above process, it can be seen that the pressure sensor 911 arranged on the blade 91 can directly detect the pressure exerted on the blade 91 by the airflow, and then control the synchronous rotation and contraction of the blade 91, realize the synchronous adjustment of the pitch angle and the extension length of the blade 91, adapt to the change of the pressure caused by the change of the concentration of water mist in the airflow in the positive pressure pipeline 1, so that the blade 91 is always in the most efficient state and within the designed bearing capacity range, which not only ensures high power generation efficiency but also ensures a long service life of the blade 91.

[0038] In other embodiments, the shape of the wind wheel cylinder can also be changed to other revolution bodies, such as regular dodecagon, cylindrical, etc., the fairing can be conical, or spherical or frustum-shaped, and the number of spline teeth is not limited to four, but can also be three, five or six, etc.

[0039] Embodiment 2 of the coal mine underground wind power generation device of the present application: as shown in Figure 8 、 9 The difference between the embodiment 2 and the embodiment 1 is that the positive pressure pipeline 1 comprises a plurality of pipeline units 11 and a joint pipe 12 connected between two adjacent pipeline units 11, the wind energy capturing module and the mechanical transmission module 4 are installed in the joint pipe 12, specifically, flanges 13 are arranged on the end faces of the two ends of the pipeline unit 11 and the joint pipe 12 respectively, and the flanges 13 are connected by bolts, the mechanical transmission module 4 comprises a main shaft 41 and a gear box, the gear box is fixed in the positive pressure pipeline 1 by a plurality of support rods 42 uniformly distributed in the circumferential direction, and four support rods 42 are arranged in the embodiment.

[0040] The above is only the preferred embodiment of the present application, and is not used to limit the present application, the patent protection scope of the present application is subject to the claims, any equivalent structural changes made by using the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A wind power generation device in a coal mine, characterized by, The wind energy capturing module comprises a wind rotor barrel with an axis collinear with the axis of the positive pressure pipeline, one end of the wind rotor barrel facing the airflow direction is provided with a guide cone, and the other end thereof is used for fixed connection with the main shaft of the mechanical transmission module, an adjusting motor is arranged in the guide cone, an output shaft of the adjusting motor is connected with a driving bevel gear, the axis of the driving bevel gear is collinear with the axis of the wind rotor barrel, a plurality of blade units are uniformly distributed in the circumferential direction of the wind rotor barrel, the blade unit comprises a driven bevel gear, an adjusting rod, a fixed nut, a blade and a follow-up turntable, the driven bevel gear comprises a tooth end and a shaft end, the tooth end is engaged with the driving bevel gear for transmission, the shaft end is provided with a spline tooth, one end of the adjusting rod is fixedly connected with the blade, and the other end thereof is provided with a spline hole matched with the spline tooth, the depth of the spline hole is greater than the length of the spline tooth, the shaft end is circumferentially rotationally stopped and axially slidably matched with the adjusting rod through the cooperation of the spline tooth and the spline hole, the fixed nut is fixed relative to the wind rotor barrel, the middle part of the adjusting rod is screwedly connected with the inner threaded hole of the fixed nut, and the follow-up turntable is rotationally assembled on the corresponding side wall of the wind rotor barrel, and the follow-up turntable is provided with a through hole for the corresponding blade to pass through. A pressure sensor is fixed on the blade to detect the pressure of the airflow on the blade, when the pressure increases, the adjusting motor is driven to rotate the adjusting rod, so that the length of the blade extending out of the follow-up turntable is reduced, and the pitch angle of the blade is increased; when the pressure on the blade decreases, the length of the blade extending out is increased, and the pitch angle of the blade is reduced. The humidity sensor is arranged on the inner wall of the positive pressure pipeline to detect the moisture content in the positive pressure pipeline.

2. The coal mine underground wind power generation device according to claim 1, characterized in that, The controller is electrically connected with the humidity sensor, the pressure sensor and the adjusting motor to calculate the moisture content in the airflow according to the feedback of the sensors, and then control the rotation of the adjusting motor. An installation circular hole is arranged on the wind rotor barrel corresponding to the follow-up turntable, and the follow-up turntable is axially blocked and circumferentially rotationally and slidably matched with the installation circular hole through an annular groove and an annular boss. Dustproof bristles or elastic sealing rings are connected to the inner wall of the through hole of the follow-up turntable.

3. The coal mine underground wind power generation device according to claim 1, characterized in that, There are three blade units, and the cross section of the wind rotor barrel is a regular hexagon.

4. The coal mine underground wind power generation device according to claim 1, characterized in that, The mechanical transmission module comprises a main shaft and a gear box, and the gear box is fixed in the positive pressure pipeline through a plurality of support rods uniformly distributed in the circumferential direction.

5. The coal mine underground wind power generation device according to claim 1, characterized in that, The positive pressure pipeline comprises a plurality of pipeline units and a joint pipe connected between two adjacent pipeline units, and the wind energy capturing module and the mechanical transmission module are arranged in the joint pipe.

6. The coal mine underground wind power generation device according to claim 1, characterized in that, The power generation and power processing module is arranged outside the positive pressure pipeline, and comprises a generator and a rectifier-inverter device.

7. The wind power generation device for underground coal mine according to claim 6, characterized in that, ​ 8. The coal mine underground wind power generation device according to claim 1, characterized in that, ​

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