Automatic locking impeller lock for wind power generation

Abstract

The invention belongs to the technical field of wind power generation equipment, and particularly relates to a wind power generation automatic locking impeller lock which comprises an impeller body and a shell used for installing the impeller lock, a supporting plate is fixedly connected to the inner wall of the shell, and a micro generator is fixedly connected to the upper surface of the supporting plate. The wind power generation impeller lock not only has the functions of automatic locking and active speed reduction, can prevent the blades from being directly locked in a high-speed rotating state and reduce impact force at the locking moment, but also has an efficient and convenient locking effect, the use reliability of the impeller lock is greatly improved, and the service life of the impeller lock is prolonged. Meanwhile, the impeller lock also has a wind blade angle adjusting function, so that the damage of strong wind load to the small-sized wind driven generator is reduced, and the use safety of the small-sized wind driven generator in a field complex strong wind environment is also comprehensively improved; the requirements of meteorological monitoring, communication equipment, scientific investigation instruments and the like on continuous power supply in field exploration and scientific research activities are fully met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power generation equipment, in particular to a wind power automatic locking impeller lock. BACKGROUND

[0002] Wind power generation is a clean energy utilization method that converts wind energy into electrical energy, and a wind turbine is the core equipment for realizing this energy conversion. The wind turbine generates electricity by capturing wind energy through blades to drive the generator to rotate. The wind power impeller lock is a key component for ensuring the safety of the unit, which is used to lock the impeller under maintenance or strong wind conditions to prevent accidental rotation and ensure the safety of the wind turbine. There are related researches on automatic locking impeller locks in the prior art, such as the patent with the authorization announcement number CN213775591U, which discloses a wind power automatic locking impeller lock. However, such patent solutions are mainly designed for large-scale wind turbine generators, and are difficult to adapt to the low-cost, portability and complex field conditions of small-scale wind turbine generators, and cannot solve the core safety and convenience problems of small-scale wind turbine generators.

[0003] Field exploration and scientific research activities are often in areas without power grid coverage. Meteorological monitoring, communication equipment, and scientific research instruments require continuous power supply. Small wind turbine generators are the preferred power supply equipment for this scenario because they are clean, renewable, and do not rely on the power grid. However, the reliability of the impeller lock directly affects the safety and stability of the power supply in the complex and variable outdoor environment and frequent strong wind weather. The existing small wind turbine generators are mainly equipped with simple mechanical locking structures due to cost control and field adaptability requirements, and only a few models use electrically assisted locking structures (such as using an electric device to push the brake pad to adhere to the brake disc that rotates synchronously with the impeller to achieve locking). However, both locking methods have significant defects. First, the mechanical locking impeller lock requires manual locking, which is tedious and affects the convenience of using the impeller lock. Second, the electrically assisted locking impeller lock can only limit the rotation of the impeller and cannot adjust the angle of the blades. After locking, the blades are still in the maximum wind area state, and the strong wind load continuously acts on the blades, which can easily cause blade fatigue cracking, hub deformation, and other faults, seriously affecting the service life of the equipment and making it difficult to meet the safety power supply requirements in complex and strong wind environments. Moreover, due to the impact of strong winds, the rotational torque of the blades acting on the impeller may exceed the braking friction of the locking mechanism, causing the impeller to break through the lock and rotate again, which not only significantly reduces the reliability of the impeller lock, but also may cause accidents due to the unexpected rotation of the impeller, posing a significant safety hazard.

[0004] Therefore, we propose a wind power automatic locking impeller lock to solve the above problems. SUMMARY

[0005] The purpose of this invention is to address the above-mentioned problems by providing an automatic locking rotor lock for wind power generation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic locking impeller lock for wind power generation, comprising an impeller body and a housing for installing the impeller lock, wherein a support plate is fixedly connected to the inner wall of the housing, a micro generator is fixedly connected to the upper surface of the support plate, a circular hole is provided on the side wall of the housing, and a first sealing bearing is fixedly connected to the wall of the circular hole, a cylindrical rotating shaft is fixedly connected to the inner wall of the first sealing bearing, one end of the cylindrical rotating shaft is fixedly sleeved with the impeller body, and the other end of the cylindrical rotating shaft is fixedly connected to the connection end of the micro generator through a coupling; The impeller body has an internal ventilation cavity, and the outer wall of the impeller body has multiple blade mounting slots evenly distributed. The groove wall of the blade mounting slot has a second circular hole, and the wall of the second circular hole is fixedly connected to a second sealing bearing. The end of the second sealing bearing away from the blade mounting slot is located inside the ventilation cavity. The inner wall of the second sealing bearing is fixedly connected to a rotating rod, and the outer end of the rotating rod is fixedly connected to a wind turbine blade connecting mechanism. The wall of the ventilated cavity is slidably sealed with a wind turbine blade angle adjustment mechanism. The bottom end of the outer casing is fixedly connected to a drive mechanism for the operation of the wind turbine blade angle adjustment mechanism. The outer wall of the cylindrical shaft is fitted with a locking mechanism.

[0007] In the aforementioned wind power automatic locking rotor lock, the wind turbine blade connection mechanism includes a mounting block fixedly connected to the outer end of the rotor. The outer wall of the mounting block has a mounting groove, and the groove wall of the mounting groove has multiple mounting through holes.

[0008] In the aforementioned automatic locking rotor lock for wind power generation, the wind turbine blade angle adjustment mechanism includes a sliding protrusion that is slidably connected to the inner wall of the ventilation cavity. A graphite limiting ring is fixedly sleeved on the outer wall of the sliding protrusion. The outer wall of the graphite limiting ring is slidably and sealingly connected to the cavity wall of the ventilation cavity. A drive gear is fixedly sleeved on the end of each of the plurality of rotating rods away from the blade mounting slot. A rack meshes on the outer wall of the drive gear. The side ends of the plurality of racks are fixedly connected to the outer wall of the sliding protrusion.

[0009] In the aforementioned automatic locking rotor lock for wind power generation, the drive mechanism includes an electric push rod and a PLC controller fixedly connected to the inner wall of the bottom end of the housing. A horizontal push rod is fixedly connected to the moving end of the electric push rod. A hollow block is movably sleeved on the wall of the horizontal push rod. A fixed through hole is provided at the bottom end of the housing to mate with the bottom end of the hollow block. A support block is slidably connected to the inner wall of the hollow block. The outer wall of the support block is fixedly connected to the side end of the horizontal push rod. A sealing ring is fixedly sleeved on the outer wall of the support block. The hollow block is slidably sealed to the inner wall of the hollow block. A bent pipe is fixedly connected to the side of the hollow block away from the horizontal push rod. A third sealing bearing is fixedly sleeved on the outer wall of the cylindrical rotating shaft. A sealing cover is fixedly sleeved on the outer wall of the third sealing bearing. The outer wall of the sealing cover with its opening side is fixedly connected to the inner wall of the outer shell. An air inlet hole is opened on the outer wall of the cylindrical rotating shaft located inside the sealing cover. A fixed through hole is opened on the outer wall of the sealing cover, and a speed sensor is fixedly connected to the hole wall of the fixed through hole. The bottom end of the bent pipe is fixedly connected to the bottom end of the sealing cover.

[0010] In the aforementioned wind power automatic locking impeller lock, the inner diameter of the air inlet is 12-15 cm, and the detection end of the speed sensor is on the same vertical plane as the air inlet.

[0011] In the aforementioned automatic locking rotor lock for wind power generation, the locking mechanism includes a brake disc fixedly sleeved to the outer wall of a cylindrical rotating shaft. A first friction block is fixedly embedded in the outer wall of the brake disc. A vertical rod is fixedly connected to the upper surface of the horizontal push rod. A second friction block is fixedly connected to the side of the vertical rod near the first friction block. A branch pipe is fixedly connected to the wall of the bent pipe. A small cylinder is fixedly connected to the side end of the branch pipe. The outer wall of the small cylinder is fixedly connected to the outer wall of the hollow block. A metal friction block is fixedly connected to the telescopic end of the small cylinder.

[0012] In the aforementioned wind power automatic locking impeller lock, multiple evenly distributed exhaust grooves are provided on the outer wall of the opposite side of the first friction block and the second friction block.

[0013] In the aforementioned wind power generator automatic locking rotor lock, the top of the outer casing is fixedly connected to a casing cover by screws, and the bottom outer wall of the outer casing is provided with a fixing through hole, and a conductive aviation plug is fixedly connected to the wall of the fixing through hole.

[0014] Compared with existing technologies, the advantages of an automatic locking rotor lock for wind power generation are: 1. Through the set drive mechanism and speed sensor, the speed sensor detects the speed of the cylindrical shaft in real time and feeds it back to the PLC controller. When the speed exceeds the threshold, the PLC controller triggers the electric push rod to start and pushes the small cylinder to drive the metal friction block to fit with the brake disc to achieve pre-speed reduction. This mechanism enables the impeller lock to have an active speed reduction function, which can prevent the blade from being locked directly in the high-speed rotation state, reduce the impact force at the moment of locking, and significantly improve the efficiency and safety of impeller locking.

[0015] 2. Through the locking mechanism, after the electric push rod is started, the horizontal push rod pushes the vertical rod to make the second friction block and the first friction block of the brake disc come into close contact. In conjunction with the exhaust groove, air is discharged from the contact surface and friction debris is contained, forming a double friction lock. This design not only realizes the automatic locking function of the impeller lock, but also improves the locking efficiency and stability, and greatly reduces the safety hazards of the impeller breaking the lock.

[0016] 3. Through the set wind turbine blade angle adjustment mechanism, the wind turbine blade angle adjustment mechanism cooperates with the airflow drive mechanism. The high-pressure airflow generated by the drive mechanism is introduced into the air-permeable cavity of the impeller body through the bend and air inlet hole, pushing the sliding protrusion to slide directionally along the cavity through the graphite limit ring. The rack synchronously drives the drive gear on the rotating rod to rotate, thereby deflecting the wind turbine blade to the minimum wind-receiving area. This structure realizes the automatic adjustment of the wind turbine blade angle, effectively reducing the wind pressure load on the blade in strong wind environment, avoiding blade fatigue cracking and hub deformation, while reducing the rotational torque of the blade on the impeller, consolidating the locking effect of the locking mechanism, and extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an automatic locking impeller lock for wind power generation provided by the present invention; Figure 2 This is a partially enlarged structural diagram of an automatic locking impeller lock for wind power generation provided by the present invention; Figure 3 This is a schematic diagram of the hollow block portion of an automatic locking impeller lock for wind power generation provided by the present invention; Figure 4 This is a schematic diagram of the structure of the wind turbine blade connection mechanism in the automatic locking impeller lock for wind power generation provided by the present invention; Figure 5 This is a three-dimensional structural diagram of the cylindrical shaft portion in an automatic locking impeller lock for wind power generation provided by the present invention; Figure 6 This is a three-dimensional structural diagram of the second friction block in an automatic locking impeller lock for wind power generation provided by the present invention.

[0018] In the diagram: 1 Impeller body, 2 Housing, 3 Support plate, 4 Micro generator, 5 First sealed bearing, 6 Wind turbine blade connection mechanism, 61 Mounting block, 62 Mounting groove, 63 Mounting through hole, 7 Wind turbine blade angle adjustment mechanism, 71 Sliding protrusion, 72 Graphite limit ring, 73 Drive gear, 74 Rack, 8 Drive mechanism, 81 Electric push rod, 82 PLC controller, 83 Horizontal push rod, 84 Hollow block, 85 Support block, 86 Sealing ring, 87 Bend, 88 Third sealed bearing, 89 Sealing cover, 810 Air inlet hole, 811 Speed ​​sensor, 9 Locking mechanism, 91 Brake disc, 92 First friction block, 93 Vertical rod, 94 Second friction block, 95 Branch pipe, 96 Small cylinder, 97 Metal friction block, 10 Cylindrical shaft, 11 Ventilation cavity, 12 Blade mounting slot, 13 Second sealed bearing, 14 Rotating rod, 15 Exhaust groove, 16 Housing cover, 17 Conductive aviation plug. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-6 As shown, an automatic locking impeller lock for wind power generation includes an impeller body 1 and a housing 2 for installing the impeller lock. A support plate 3 is fixedly connected to the inner wall of the housing 2, and a micro generator 4 is fixedly connected to the upper surface of the support plate 3. A circular hole is opened on the side wall of the housing 2, and a first sealing bearing 5 is fixedly connected to the wall of the circular hole. A cylindrical shaft 10 is fixedly connected to the inner wall of the first sealing bearing 5. One end of the cylindrical shaft 10 is fixedly sleeved with the impeller body 1, and the other end of the cylindrical shaft 10 is fixedly connected to the connection end of the micro generator 4 through a coupling.

[0021] The impeller body 1 has an internal ventilation cavity 11. The outer wall of the impeller body 1 has multiple blade mounting slots 12 evenly distributed. The groove wall of the blade mounting slot 12 has a second round hole. The wall of the second round hole is fixedly connected to a second sealing bearing 13. The end of the second sealing bearing 13 away from the blade mounting slot 12 is located inside the ventilation cavity 11. The inner wall of the second sealing bearing 13 is fixedly connected to a rotating rod 14. The outer end of the rotating rod 14 is fixedly connected to a wind turbine blade connecting mechanism 6. The wind turbine blade connecting mechanism 6 includes a mounting block 61 fixedly connected to the outer end of the rotating rod 14. The outer wall of the mounting block 61 has a mounting groove 62, and the groove wall of the mounting groove 62 has multiple mounting through holes 63.

[0022] The wall of the ventilated cavity 11 is slidably sealed to a wind turbine blade angle adjustment mechanism 7. The wind turbine blade angle adjustment mechanism 7 includes a sliding protrusion 71 that is slidably connected to the inner wall of the ventilated cavity 11. A graphite limiting ring 72 is fixedly sleeved on the outer wall of the sliding protrusion 71. The outer wall of the graphite limiting ring 72 is slidably sealed to the wall of the ventilated cavity 11. A drive gear 73 is fixedly sleeved on the end of a plurality of rotating rods 14 away from the blade mounting slot 12. A rack 74 meshes on the outer wall of the drive gear 73. The side ends of the plurality of racks 74 are fixedly connected to the outer wall of the sliding protrusion 71.

[0023] A drive mechanism 8 for the operation of the wind turbine blade angle adjustment mechanism 7 is fixedly connected to the bottom end of the outer casing 2. The drive mechanism 8 includes an electric push rod 81 and a PLC controller 82 fixedly connected to the inner wall of the bottom end of the outer casing 2. A horizontal push rod 83 is fixedly connected to the moving end of the electric push rod 81. A hollow block 84 is movably sleeved on the rod wall of the horizontal push rod 83. A fixed through hole is opened at the bottom end of the outer casing 2 to cooperate with the bottom end of the hollow block 84. A support block 85 is slidably connected to the inner wall of the hollow block 84. The outer wall of the support block 85 is fixedly connected to the side end of the horizontal push rod 83. A sealing ring 86 is fixedly sleeved on the outer wall of the support block 85. The outer wall of the sealing ring 86 is slidably and sealingly connected to the inner wall of the hollow block 84. A bent pipe 87 is fixedly connected to the side of the cylindrical shaft 10 away from the horizontal push rod 83. A third sealing bearing 88 is fixedly sleeved on the outer wall of the cylindrical shaft 10. A sealing cover 89 is fixedly sleeved on the outer wall of the third sealing bearing 88. The outer wall of the opening side of the sealing cover 89 is fixedly connected to the inner wall of the outer shell 2. An air inlet hole 810 is opened on the outer wall of the cylindrical shaft 10 located inside the sealing cover 89. A fixed through hole is opened on the outer wall of the sealing cover 89, and a speed sensor 811 is fixedly connected to the hole wall of the fixed through hole. The bottom end of the bent pipe 87 is fixedly connected to the bottom end of the sealing cover 89. The inner diameter of the air inlet hole 810 is 13 cm. The detection end of the speed sensor 811 is on the same vertical plane as the air inlet hole 810.

[0024] A locking mechanism 9 is sleeved on the outer wall of the cylindrical rotating shaft 10. The locking mechanism 9 includes a brake disc 91 fixedly sleeved on the outer wall of the cylindrical rotating shaft 10. A first friction block 92 is fixedly embedded on the outer wall of the brake disc 91. A vertical rod 93 is fixedly connected to the upper surface of the horizontal push rod 83. A second friction block 94 is fixedly connected to the side of the vertical rod 93 near the first friction block 92. A branch pipe 95 is fixedly connected to the wall of the bent pipe 87. A small cylinder 96 is fixedly connected to the side end of the branch pipe 95. The outer wall of the small cylinder 96 is fixedly connected to the outer wall of the hollow block 84. A metal friction block 97 is fixedly connected to the telescopic end of the small cylinder 96. Multiple evenly distributed exhaust grooves 15 are opened on the outer wall of the opposite side of the first friction block 92 and the second friction block 94.

[0025] The top of the outer casing 2 is fixedly connected to the casing cover 16 by screws, and the bottom outer wall of the outer casing 2 is provided with a fixing through hole, and a conductive aviation plug 17 is fixedly connected to the hole wall of the fixing through hole.

[0026] The speed sensor 811 is electrically connected to the input terminal of the PLC controller 82 via a wire, and the electric push rod 81 is electrically connected to the output terminal of the PLC controller 82 via a wire. The above-mentioned electrical components and electrical connections are all existing technologies and will not be described in detail here.

[0027] The operating principle of the present invention is described as follows: When the small wind turbine is put into use, the connecting end of the wind turbine blade is first tightly fitted to the inner wall of the mounting groove 62 of the mounting block 61. Fasteners pass through the mounting through hole 63 of the mounting groove 62 and precisely match and tighten with the threaded hole of the connecting end of the wind turbine blade, ensuring that the wind turbine blade and the rotor 14 are firmly and reliably connected, avoiding loosening or falling off during rotation, and ensuring the stability of the power generation process. Then, the wind turbine blades bear the natural wind force with the maximum wind-receiving area. The wind drives the blades to drive the impeller body 1 to rotate synchronously. The impeller body 1 drives the cylindrical shaft 10 to rotate together through the fixed sleeve relationship with the cylindrical shaft 10. The other end of the cylindrical shaft 10 is fixedly connected to the connecting end of the micro generator 4 through the coupling, thereby driving the rotor of the micro generator 4 to rotate, realizing the conversion of wind energy into electrical energy and completing the power generation operation. During the rotation of the cylindrical shaft 10, the air inlet 810 located on the inner outer wall of the sealing cover 89 rotates synchronously with the cylindrical shaft 10. Since the detection end of the speed sensor 811 and the air inlet 810 are on the same vertical plane, and the sealing cover 89 is a closed structure, when the air inlet 810 rotates past the detection end of the speed sensor 811, it causes periodic changes in the detection optical path of the speed sensor 811, thereby generating a regular electrical signal. The speed sensor 811 continuously captures this periodic signal change and counts the number of signal on / off cycles per unit time (e.g., 1 second), thus... The number of intake holes 810 (in this structure, it is a single intake hole 810) is determined, and the real-time rotational speed of the cylindrical shaft 10 is accurately calculated using the formula "rotational speed (rpm) = number of signal on / off cycles per unit time × 60". This detection method relies on the precise alignment design of the intake hole 810 and the speed sensor 811, which can effectively avoid misjudgment of rotational speed caused by position deviation, and provide accurate and real-time rotational speed data support for the subsequent decision-making of the PLC controller 82. The speed sensor 811 finally transmits the detected rotational speed of the cylindrical shaft 10 to the PLC controller 82 in the form of an electrical signal. The PLC controller 82 has a pre-stored speed threshold adapted to the safe operation of the small wind turbine. This speed threshold is scientifically preset based on core parameters such as the rated power of the equipment, the strength of the blade structure, and the load limit of the unit. When the speed of the cylindrical shaft 10 detected by the speed sensor 811 exceeds the preset threshold, it indicates that the small wind turbine is in a dangerous operating condition of exceeding the rated speed. If the impeller body 1 is not locked in time, it may cause safety hazards such as blade fatigue, hub deformation, or even damage to the unit. At this time, the PLC controller 82 immediately triggers the locking program and controls the electric push rod 81 to start. The moving end of the electric push rod 81 extends and pushes the horizontal push rod 83 to move in the horizontal direction. The horizontal push rod 83 drives the support block 85, which is fixedly connected to it, to slide inside the hollow block 84. Since the sealing ring 86 fixedly sleeved on the outer wall of the support block 85 and the inner wall of the hollow block 84 achieve a sealed sliding connection, the support block 85 will squeeze the air inside the hollow block 84 when it moves, so that the air inside the hollow block 84 forms a high-pressure airflow and enters the bend pipe 87. The high-pressure airflow entering the bend 87 is divided into two parts: one part of the airflow enters the small cylinder 96 through the branch pipe 95 fixedly connected to the wall of the bend 87. The high-pressure airflow drives the telescopic end of the small cylinder 96 to extend outward, pushing the metal friction block 97 towards the brake disc 91 until the metal friction block 97 is tightly attached to the outer wall of the brake disc 91. The friction between the metal friction block 97 and the brake disc 91 achieves pre-deceleration of the brake disc 91, thereby driving the cylindrical rotating shaft 10 and the impeller body 1 to pre-decelerate synchronously. This mechanism enables the impeller lock to have an active deceleration function, which can prevent the blade from being locked directly in a high-speed rotating state, reduce the impact force at the moment of locking, and significantly improve the efficiency and safety of the impeller lock.

[0028] Simultaneously, as the horizontal push rod 83 moves, the vertical rod 93 fixedly connected above the horizontal push rod 83 moves towards the brake disc 91 until the second friction block 94 on the vertical rod 93 is tightly fitted with the first friction block 92 embedded in the outer wall of the brake disc 91. Both the first friction block 92 and the second friction block 94 are made of highly wear-resistant materials. The multiple evenly distributed exhaust grooves 15 on the outer walls of their opposite sides can not only quickly expel air between the contact surfaces to avoid the formation of an air cushion that reduces friction, but also accommodate debris generated during friction to prevent debris accumulation from affecting the friction effect. Under the dual action of the second friction block 94 squeezing and rubbing against one side of the first friction block 92, and the metal friction block 97 squeezing and rubbing against the other side of the brake disc 91, the brake disc 91 can be quickly and completely locked, thereby fixing the cylindrical shaft 10 and the impeller body 1. Through the structural design of the exhaust groove 15, the resistance of impeller locking is reduced and the friction coefficient of the contact surface is increased, making the impeller body 1 more stable and reliable in locking. This mechanism not only gives the wind turbine impeller lock an automatic locking function, but also a highly efficient and convenient locking effect, which greatly improves the reliability of the impeller lock.

[0029] While the high-pressure airflow is split within the bend 87, another portion of the airflow is injected into the sealing cover 89 through the fixed connection between the bottom end of the bend 87 and the bottom end of the sealing cover 89. It then enters the cylindrical shaft 10 through the air inlet 810 and is subsequently guided into the ventilated cavity 11 of the impeller body 1. Since the sliding protrusion 71 is sealed and slidably connected to the cavity wall of the ventilated cavity 11 via the graphite limiting ring 72, the high-pressure airflow entering the ventilated cavity 11 pushes the sliding protrusion 71 to move directionally along the axis of the ventilated cavity 11. The graphite limiting ring 72 not only reduces the frictional resistance between the sliding protrusion 71 and the cavity wall of the ventilated cavity 11, ensuring the smooth movement of the sliding protrusion 71, but also... It can also enhance the sealing of the air-permeable cavity 11, prevent high-pressure air leakage, ensure that the airflow thrust is concentrated on the sliding protrusion 71, and avoid the angle adjustment response lag or failure due to air leakage. When the sliding protrusion 71 moves, multiple racks 74 fixedly connected to its outer wall will move synchronously. The racks 74 and the drive gear 73 fixedly sleeved on the rotating rod 14 mesh with each other. The linear motion of the racks 74 is converted into the rotational motion of the drive gear 73, which causes the drive gear 73 to drive the rotating rod 14 to deflect at a specific angle (such as 90°). The rotating rod 14 drives the wind turbine blades to rotate synchronously through the wind turbine blade connection mechanism 6, so that the wind turbine blades, which were originally in the maximum wind-receiving area state, are precisely adjusted to the preset minimum wind-receiving area state. This angle adjustment design can significantly reduce the wind pressure load on the wind turbine blades in strong wind environments. On the one hand, it can effectively prevent the blades from fatigue cracking, deformation and other failures caused by continuous impact from strong winds, thus ensuring the service life of the wind turbine blades. On the other hand, the reduced wind pressure load will decrease the rotational torque of the blades acting on the impeller body 1, preventing the torque from exceeding the braking friction of the locking mechanism 9 and causing the impeller body 1 to break the lock and rotate again. This ensures the stability of the impeller lock state and prevents it from failing due to strong wind pressure interference. This mechanism enables the impeller lock to also have the function of adjusting the wind turbine blade angle, which not only reduces the damage of strong wind load to the small wind turbine, but also further consolidates the reliability of the impeller lock. This comprehensively improves the safety of the small wind turbine in complex strong wind environments in the field and fully meets the needs of meteorological monitoring, communication equipment, scientific instruments and other equipment in field exploration and scientific research activities for continuous power supply.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine automatic locking impeller lock, comprising an impeller body (1) and a housing (2) for mounting the impeller lock, characterized in that, A support plate (3) is fixedly connected to the inner wall of the outer shell (2), and a micro generator (4) is fixedly connected to the upper surface of the support plate (3). A circular hole is opened on the side wall of the outer shell (2), and a first sealed bearing (5) is fixedly connected to the hole wall of the circular hole. A cylindrical shaft (10) is fixedly connected to the inner wall of the first sealed bearing (5). One side end of the cylindrical shaft (10) is fixedly sleeved with the impeller body (1), and the other side end of the cylindrical shaft (10) is fixedly connected to the connection end of the micro generator (4) through a coupling. The impeller body (1) has a ventilated cavity (11) inside. The outer wall of the impeller body (1) has a plurality of blade mounting slots (12) evenly distributed. The groove wall of the blade mounting slot (12) has a round hole II. The hole wall of the round hole II is fixedly connected to a second sealing bearing (13). The end of the second sealing bearing (13) away from the blade mounting slot (12) is located inside the ventilated cavity (11). The inner wall of the second sealing bearing (13) is fixedly connected to a rotating rod (14). The outer end of the rotating rod (14) is fixedly connected to a wind turbine blade connecting mechanism (6). The wall of the ventilated cavity (11) is slidably sealed with a wind turbine blade angle adjustment mechanism (7). The bottom end of the outer shell (2) is fixedly connected to a drive mechanism (8) for the operation of the wind turbine blade angle adjustment mechanism (7). The outer wall of the cylindrical rotating shaft (10) is fitted with a locking mechanism (9).

2. The wind power generation automatic locking rotor lock according to claim 1, characterized in that, The wind turbine blade connection mechanism (6) includes a mounting block (61) fixedly connected to the outer end of the rotating rod (14). The outer wall of the mounting block (61) is provided with a mounting groove (62), and the groove wall of the mounting groove (62) is provided with a plurality of mounting through holes (63).

3. The wind power generation automatic locking rotor lock according to claim 1, characterized in that, The wind turbine blade angle adjustment mechanism (7) includes a sliding protrusion (71) that is slidably connected to the inner wall of the ventilation cavity (11). A graphite limiting ring (72) is fixedly sleeved on the outer wall of the sliding protrusion (71). The outer wall of the graphite limiting ring (72) is slidably connected to the cavity wall of the ventilation cavity (11). A drive gear (73) is fixedly sleeved on the end of each of the multiple rotating rods (14) away from the blade mounting slot (12). A rack (74) meshes on the outer wall of the drive gear (73). The side ends of the multiple racks (74) are fixedly connected to the outer wall of the sliding protrusion (71).

4. The wind power generation automatic locking rotor lock according to claim 1, characterized in that, The drive mechanism (8) includes an electric push rod (81) and a PLC controller (82) fixedly connected to the inner wall of the bottom end of the housing (2). A horizontal push rod (83) is fixedly connected to the moving end of the electric push rod (81). A hollow block (84) is movably sleeved on the rod wall of the horizontal push rod (83). A fixed through hole that matches the bottom end of the hollow block (84) is opened at the bottom end of the housing (2). A support block (85) is slidably connected to the inner wall of the hollow block (84). The outer wall of the support block (85) is fixedly connected to the side end of the horizontal push rod (83). A sealing ring (86) is fixedly sleeved on the outer wall of the support block (85). The outer wall of the sealing ring (86) is connected to the inner wall of the hollow block (84). A sealed sliding connection is provided. A bent pipe (87) is fixedly connected to the side of the hollow block (84) away from the horizontal push rod (83). A third sealed bearing (88) is fixedly sleeved on the outer wall of the cylindrical rotating shaft (10). A sealing cover (89) is fixedly sleeved on the outer wall of the third sealed bearing (88). The outer wall of the opening side of the sealing cover (89) is fixedly connected to the inner wall of the outer shell (2). An air inlet hole (810) is opened on the outer wall of the cylindrical rotating shaft (10) located inside the sealing cover (89). A fixed through hole is opened on the outer wall of the sealing cover (89), and a speed sensor (811) is fixedly connected to the hole wall of the fixed through hole. The bottom end of the bent pipe (87) is fixedly connected to the bottom end of the sealing cover (89).

5. The wind power generation automatic locking rotor lock according to claim 4, characterized in that, The inner diameter of the air intake hole (810) is 12-15 cm, and the detection end of the speed sensor (811) is on the same vertical plane as the air intake hole (810).

6. The wind power generation automatic locking rotor lock according to claim 4, characterized in that, The locking mechanism (9) includes a brake disc (91) fixedly sleeved with the outer wall of the cylindrical rotating shaft (10). A first friction block (92) is fixedly embedded in the outer wall of the brake disc (91). A vertical rod (93) is fixedly connected to the upper surface of the horizontal push rod (83). A second friction block (94) is fixedly connected to the side of the vertical rod (93) near the first friction block (92). A branch pipe (95) is fixedly connected to the wall of the bent pipe (87). A small cylinder (96) is fixedly connected to the side end of the branch pipe (95). The outer wall of the small cylinder (96) is fixedly connected to the outer wall of the hollow block (84). A metal friction block (97) is fixedly connected to the telescopic end of the small cylinder (96).

7. The wind power generation automatic locking rotor lock according to claim 6, characterized in that, Multiple evenly distributed exhaust grooves (15) are provided on the outer wall of the first friction block (92) and the second friction block (94) on opposite sides.

8. The wind power generation automatic locking rotor lock according to claim 1, characterized in that, The top of the outer shell (2) is fixedly connected to the shell cover (16) by screws, and the bottom outer wall of the outer shell (2) is provided with a fixing through hole, and the hole wall of the fixing through hole is fixedly connected to a conductive aviation plug (17).

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