High-altitude wind power generation system

Abstract

This invention discloses a high-altitude wind power generation system, relating to the field of wind power generation technology, including a wind turbine, a generator, a Y-shaped main cable, and a ground winch. The wind turbine is a flattened ellipsoidal airbag structure, filled with buoyancy gas to achieve high-altitude operation, with a main shaft running horizontally through it. The main shaft is a coarse-to-fine fitted sleeve structure, with the sleeves internally sealed to form a cylinder. Inflating or depressurizing the sleeves drives their extension or retraction. Optional tension springs / springs are also provided to drive the extension and retraction via elastic force, achieving adaptive adjustment of the pressure difference inside and outside the airbag to maintain its shape and rigidity. The outer arc surface of the airbag is circumferentially heat-sealed with unidirectional arc-shaped blades, giving the wind turbine a unidirectional ratchet shape. The generator is symmetrically installed at both ends of the main shaft, held in place by its own weight and connected to the main shaft. Two branches of the Y-shaped main cable are respectively attached to the generator, and the main cable connects to the ground winch. During operation, the lower blades unfold in the windward direction, while the upper blades are flattened, working in conjunction with the airbag's ability to rotate with the wind to drive the wind turbine to generate electricity. The electricity is then transmitted to the ground for processing and grid connection or supplied to users. This system has a simple structure, is easy to install and maintain, is highly efficient in wind capture and generates stable power, and is suitable for various high-altitude wind energy scenarios.

Description

Technical fields: This invention relates to the field of wind power generation technology, and more specifically to a high-altitude wind power generation system. Technical background: With the escalating global energy crisis and heightened environmental awareness, the development and utilization of renewable energy has become a key focus of energy development in various countries. Among these, wind power, as a technologically mature and widely used renewable energy source, has experienced rapid development. Traditional wind power systems are mostly ground-based tower structures, which are limited by factors such as terrain and wind speed, resulting in problems such as low wind energy capture efficiency, large footprint, and high installation and maintenance costs. High-altitude areas, with their higher wind speeds, more stable wind directions, and abundant wind energy resources, are ideal locations for wind power generation. However, existing high-altitude wind power technologies suffer from drawbacks such as complex structures, poor adaptability to high-altitude environments, difficult installation and commissioning, and insufficient power generation stability, hindering large-scale promotion and application. For example, some high-altitude wind power generation systems employ a complex method of using two sets of balloons and parachutes to drive cables, rising and falling to power ground generators. This results in high wind resistance during balloon retrieval, significant energy loss, low efficiency, and easily damaged parachutes. In severe weather, manually removing the parachutes from the cables is difficult and risky, making it unsuitable for handling sudden severe weather events. Conversely, high-altitude ducted wind power generation systems have limited blade diameters, making external frame removal difficult and significantly limiting power output. They also incur high manufacturing and maintenance costs and fail to fully utilize the abundant wind energy resources at high altitudes. Furthermore, existing high-altitude airbag-type wind power generation devices often lack effective differential pressure regulation mechanisms. Sudden changes in air temperature or altitude can cause drastic pressure changes inside and outside the airbag, leading to deformation, rupture, or insufficient rigidity, affecting power generation stability. Therefore, developing a high-altitude wind power generation system with a simple structure, convenient installation and maintenance, high wind energy capture efficiency, strong power generation stability, adaptive differential pressure regulation capability, and reliable stationary performance has become a pressing technical challenge in the field of wind power generation. Summary of the Invention: 1. Technical problems to be solved The purpose of this invention is to overcome the shortcomings of existing high-altitude wind power generation systems, such as complex structure, difficult installation and maintenance, low wind energy capture efficiency, poor power generation stability, large investment, lack of effective differential pressure regulation mechanism, and insufficient airborne reliability. This invention provides a high-altitude wind power generation system with a simple structure, convenient installation and maintenance, efficient capture of high-altitude wind energy, strong power generation stability, adaptive differential pressure regulation capability to adapt to changes in the high-altitude environment, and reliable airborne reliability, making it suitable for various high-altitude wind energy utilization scenarios.

[0001] 2. Technical Solution The wind turbine employs a flattened ellipsoidal airbag structure, which possesses excellent windward capability, adapting to changes in wind direction at high altitudes and ensuring the turbine consistently and effectively captures wind energy. The airbag is filled with buoyancy gas, either helium or hydrogen, which generates buoyancy to keep the turbine hovering at high altitudes without requiring additional replenishment or emission during operation. The buoyancy gas filling reduces the load-bearing pressure on the Y-shaped main cable, improving the system's hovering stability. A main shaft runs laterally through the turbine, providing support and transmitting torque for its rotation. This main shaft is designed with a coarse-to-fine fitting sleeve structure, specifically including a left and right sleeve. The left and right sleeves are nested together and sealed to form a cylinder structure. A differential pressure gauge is mounted on the flattened ellipsoidal airbag to monitor the pressure difference inside and outside the airbag in real time, providing data for the initial calibration of the cylinder's preset positive pressure. The main shaft extension and retraction adjustment uses a positive pressure / spring composite adjustment scheme, with the core mechanism as follows: A preset positive pressure is injected into the cylinder in one go using external specialized equipment. Simultaneously, a spring is installed inside the sleeve and pre-tightened. The preset positive pressure and spring thrust work together to ensure the telescopic rod always has a continuous force at its maximum extension. This force is constantly restrained by the counterforce of the airbag, creating a dynamic balance. When changes in the high-altitude environment increase the pressure difference between the inside and outside of the airbag, the airbag tends to expand outwards, weakening its counterforce. Under the action of the preset positive pressure and spring thrust, the telescopic rod extends synchronously with the airbag, increasing the airbag volume and thus relieving internal pressure and preventing excessive pressure difference. When the pressure difference decreases, the airbag contracts, strengthening its counterforce and pushing the telescopic rod to shorten synchronously, reducing the airbag volume and compensating for pressure loss, ensuring stable pressure difference. Throughout the adjustment process, the airbag force dominates the extension and retraction of the telescopic rod, achieving an adaptive response to changes in pressure difference.

[0002] To improve the stability and controllability of differential pressure regulation, a cylindrical air reservoir is fitted on the outer layer of the main shaft sleeve. This air reservoir is fixedly fitted on the outside of the outer sleeve and maintains communication with the inner cavity of the telescopic tube. Calibration is completed in one go by external special equipment. After calibration, the tube is sealed and pressure is maintained, and no additional adjustment is required during operation. The volume of the air reservoir is precisely matched to ensure that it can fully accommodate the telescopic rod to achieve maximum extension capacity, while reserving a certain safety margin to avoid excessive stretching and damage to the air reservoir when the telescopic rod extends.

[0003] Option 1: Negative Pressure / Tension Spring Composite Adjustment. During the ground inflation phase, the airbag is inflated to the minimum pressure required to maintain its basic shape (example value 50 Pa). At this time, negative pressure is applied to the cylinder via external equipment, causing the telescopic rod to be drawn in by the negative pressure and retract to its shortest state. When the wind turbine rises to high altitude or the temperature rises, the gas inside the airbag expands due to heat, or the external air pressure decreases, leading to an increase in internal pressure. This causes the airbag to expand, which in turn drives the main shaft telescopic rod to extend synchronously, increasing the airbag volume to relieve internal pressure. A differential pressure gauge can monitor the pressure difference between the inside and outside of the airbag in real time. Based on the monitoring data, the negative pressure value that the cylinder needs to maintain is determined. This negative pressure value is used to accurately balance the internal pressure of the airbag, ensuring that the airbag is always maintained within a safe pressure difference range. The tension spring provides auxiliary restoring elastic force during the extension of the telescopic rod, improving the smoothness of adjustment.

[0004] Option 2: Positive pressure / spring combined adjustment. Its adjustment mechanism is the opposite of the negative pressure / tension spring combined adjustment: During the ground assembly stage, the cylinder is pre-charged with positive pressure to put the telescopic rod in the preset initial position, and the airbag is filled with the corresponding initial pressure; when the air temperature at high altitude decreases or the impeller descends, causing the pressure inside the airbag to decrease, the positive pressure in the cylinder pushes the telescopic rod to extend outward, causing the airbag to actively expand to compensate for the pressure loss; the differential pressure data monitored by the differential pressure gauge is used to calibrate the positive pressure value required by the cylinder, while the spring provides auxiliary elastic force during the telescopic rod's retraction process to ensure adjustment accuracy.

[0005] The flat ellipsoidal airbag has multiple unidirectional arc-shaped wind blades heat-sealed around its outer arc surface. These wind blades are evenly distributed along the outer arc surface of the sphere, making the wind turbine resemble a unidirectional ratchet. This structural design allows the wind turbine's lower blades to automatically unfold to receive the wind force during rotation, while the upper blades are flattened by the wind, reducing wind resistance and thus driving the wind turbine to rotate continuously and stably.

[0006] The generators are symmetrically installed at both ends of the main shaft. This symmetrical installation ensures balanced force on the main shaft and improves the stability of the system. The output shaft of the generator's reducer is connected to the main shaft, and the speed is adjusted through the reducer to ensure that the generator can generate electricity stably at a suitable speed. The generator is always kept below the main shaft by its own weight. This design can automatically adjust the position of the generator to avoid generator attitude deviation caused by wind turbine rotation or changes in wind direction, and ensure stable connection of the transmission mechanism.

[0007] The Y-shaped main cable is made of high-strength flexible rope material. Its structure includes two symmetrical branches and an integrated main trunk. The two branches are respectively bolted to the fixing rings of the generators at both ends of the main shaft. The upper end of the main trunk converges with and is fixed to the two branches, forming a stable Y-shaped force-bearing structure. This structure can evenly transfer the weight of the wind turbine and generator to the main trunk, effectively dispersing the single-point force and significantly improving the stability and load-bearing reliability of the suspension system. The lower end of the Y-shaped main cable is wound around the winch via the guide wheel of the ground winch. The rotation of the ground winch can realize the raising and lowering of the main trunk, thereby driving the entire wind turbine to rise and fall synchronously. This allows for flexible adjustment of the wind turbine's high-altitude suspension height, enabling the wind turbine to adapt to wind energy resource conditions at different altitudes and improving the flexibility of wind energy utilization. Compared with the traditional separate cable and main cable structure, the integrated design of the Y-shaped main cable simplifies the connection nodes, reduces the number of components, and lowers installation errors and maintenance costs.

[0008] To enhance the output torque of the main shaft and improve the conversion efficiency of the wind turbine's rotational kinetic energy into electrical energy, the main shaft is mounted on the flattened ellipsoidal airbag via a flange. The main shaft passes through the central hole of the flange and is fixedly installed thereon. This flange connection ensures the robustness of the connection between the main shaft and the airbag. Multiple radial spokes are installed around the circumference of the flange. These spokes further enhance the connection strength between the main shaft and the airbag, improving the main shaft's load-bearing capacity and torque transmission capability. A curtain is heat-sealed onto the flattened ellipsoidal airbag along both sides of the spokes. The curtain has openings, through which ropes are threaded to attach the spokes to the flattened ellipsoidal airbag. This structure effectively disperses the force exerted by the spokes on the airbag, preventing damage due to excessive local stress and extending the airbag's service life.

[0009] Preferably, the spokes are made of carbon fiber tubing, which is lightweight, high-strength, and corrosion-resistant. This material can reduce the overall weight of the wind turbine while ensuring structural strength and improving the wind turbine's rotational flexibility.

[0010] Preferably, the high-strength flexible rope selected for the Y-shaped main cable is lightweight, has a strong load-bearing capacity, good flexibility, and is resistant to wind erosion. It can stably bear the weight of components such as wind turbines and generators, while adapting to the stretching and swaying caused by changes in high-altitude wind force, ensuring the long-term stability and safety of the suspension structure.

[0011] Preferably, the buoyancy gas is helium, which is an inert gas with the characteristics of being non-flammable, highly safe, and having a low leakage rate, thus significantly improving the safety and durability of the system's buoyancy. Hydrogen can also be used, as it has stronger buoyancy and is cheaper, but because hydrogen is flammable and explosive, it must be equipped with explosion-proof devices (such as explosion-proof sensors, flame-retardant protective layers, etc.) to ensure safe operation.

[0012] The system operates as follows: The Y-shaped main cable is released via a ground winch, suspending the wind turbine (which, after being filled with buoyancy gas on the ground, has the ability to hover) to a preset altitude. During ground assembly, a preset positive pressure is injected into the cylinder, and the spring is pre-tensioned. At this point, the telescopic rod, under the action of the preset positive pressure and spring thrust, has the maximum extension force, which is restrained by the counterforce of the airbag, forming a balance. During operation, a differential pressure gauge monitors the pressure difference inside and outside the airbag in real time. When the pressure difference increases, the airbag expands outward, the restraining force weakens, the telescopic rod extends with the airbag, and the airbag volume increases to relieve pressure. When the pressure difference decreases, the airbag contracts, and the restraining force strengthens. The telescopic boom shortens synchronously, reducing the airbag volume to compensate for pressure. Under the influence of high-altitude winds, the lower unidirectional curved blades of the wind turbine automatically unfold to receive wind power and generate rotational force. As the wind turbine rotates, the upper blades are flattened by the wind, reducing wind resistance. Combined with the wind-following capability of the flattened ellipsoidal airbag, this ensures the wind turbine rotates continuously and stably. The rotational power of the wind turbine is transmitted to the generators at both ends through the main shaft. After the generator speed is regulated by the generator reducer, the generator converts mechanical energy into electrical energy. The electricity generated by the generator is transmitted via cable to ground-based power processing equipment, where it is rectified, inverted, and then connected to the grid for power supply, or directly supplied to users. 3. Beneficial effects Compared with the prior art, the beneficial effects of the present invention are as follows: Simple structure and convenient installation and maintenance: This system mainly consists of a wind turbine, generator, Y-shaped main cable and ground winch. The number of components is small and the connection is simple. The main shaft adjustment adopts a composite scheme of preset positive pressure + spring. The pressure setting and spring assembly only need to be completed once on the ground. There is no need for continuous adjustment during operation. During installation, simply fill the airbag with buoyancy gas and raise the wind turbine to the preset height by ground winch. During later maintenance, the wind turbine can be lowered to the ground by retracting the main cable, which greatly reduces the difficulty and cost of installation and maintenance.

[0013] High wind energy capture efficiency: The wind turbine adopts a flat ellipsoidal airbag structure, which has good wind-following ability and can adapt to changes in different wind directions at high altitudes; the unidirectional ratchet-shaped blade design allows the lower blade to open in the wind and the upper blade to be flattened, which maximizes the wind force while reducing wind resistance and effectively improves wind energy capture efficiency.

[0014] High power generation stability: The generator is symmetrically installed at both ends of the main shaft and relies on its own weight to maintain its position below the main shaft, ensuring stable connection of the transmission mechanism; the integrated suspension structure of the Y-shaped main cable can evenly distribute the weight and stabilize the wind turbine attitude, enabling the wind turbine to rotate continuously and stably; at the same time, the main shaft sleeve structure can adaptively adjust the pressure difference inside and outside the airbag to avoid airbag deformation or insufficient rigidity affecting rotational stability, further ensuring stable power generation of the generator.

[0015] Reliable buoyancy and strong environmental adaptability: By filling the airbag with buoyant gas to provide stable buoyancy, the wind turbine is reliably stationary; the main shaft adopts a preset positive pressure + spring adaptive differential pressure adjustment structure, which can drive the telescopic rod to extend and retract adaptively through the force of the airbag as the differential pressure changes, effectively coping with the differential pressure fluctuations caused by changes in air temperature and altitude at high altitudes, so that the system can adapt to different high-altitude environmental conditions, improving the system's environmental adaptability and operational safety.

[0016] Wide range of applications: This system can adjust the suspension height of the wind turbine via a ground winch, adapting to wind energy resource conditions at different altitudes. It is suitable for various high-altitude wind energy utilization scenarios, including plains, mountains, and offshore areas. Appendix Figure 1 Note: The attached diagram is a structural schematic of a high-altitude wind power generation system, including: 1 wind turbine, 11 main shaft, 12 air storage tank, 13 flange, 2 generator, 3 Y-shaped main cable, and 4 ground winch. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] This embodiment provides a high-altitude wind power generation system, including a wind turbine (1), a generator (2), a Y-shaped main cable (3), a ground winch (4), and a matching special air filling device (for pre-pressurized positive pressure filling of the cylinder).

[0019] The wind turbine (1) adopts a flat ellipsoidal airbag structure. The airbag is made of flexible sealing material and filled with buoyancy gas, which is helium or hydrogen. This gives the wind turbine a stable levitation ability and avoids excessive pressure that could cause the airbag to break and reduce the load-bearing pressure of the main cable. Multiple unidirectional arc-shaped wind blades are uniformly heat-sealed on the outer arc surface of the flat ellipsoidal airbag. The wind blades are made of wear-resistant and wind-erosion-resistant flexible material, making the wind turbine as a whole resemble a unidirectional ratchet.

[0020] The main shaft (11) is a coarse-fine fitting sleeve structure, including a left sleeve and a right sleeve, made of high-strength alloy steel pipe. The right sleeve is fitted inside the left sleeve, and a sealing ring is provided at the fitting point to achieve mutual sealing, forming a closed sleeve sealing cavity, which constitutes the cylinder structure. A micro differential pressure gauge is installed on the flat ellipsoidal airbag. The signal output end of the micro differential pressure gauge is electrically connected to the ground control unit to provide real-time feedback of the pressure difference data inside and outside the airbag, providing a basis for setting the preset positive pressure of the cylinder during the ground stage. A cylindrical air storage cylinder (12) is fitted on the outer layer of the main shaft sleeve. The air storage cylinder is made of flexible sealing material, tightly fitted on the outside of the outer sleeve and fixedly sealed. The air storage cylinder and the inner cavity of the telescopic tube are interconnected through a preset connecting hole. The volume of the air storage cylinder is designed according to the maximum extension stroke of the telescopic rod, ensuring that the maximum extension of the telescopic rod is accommodated while reserving a safety margin of 10%-15%. The pressure inside the air storage cylinder matches the preset positive pressure of the cylinder. The pressure is calibrated by filling it in one go through an external special inflation device. After calibration, the pressure is sealed and maintained. No additional adjustment is required during operation.

[0021] This embodiment adopts a positive pressure / spring composite adjustment scheme: during the ground assembly stage, firstly, floating gas is injected into the flat ellipsoidal airbag through a special equipment to maintain the basic shape of the wind turbine (1); then, a preset positive pressure is injected into the cylinder sealing cavity through an external special inflation device, and at the same time, springs are installed on the inner side of the left and right sleeve ends and pre-tightened, so that the telescopic rod has a continuous force that extends to its maximum length under the combined action of the preset positive pressure and the spring thrust. At this time, the force is bound by the reverse force of the airbag, forming a dynamic balance; the differential pressure gauge is started to monitor and record the reference pressure difference inside and outside the airbag at this time, which serves as the verification basis for the preset positive pressure setting. When the wind turbine (1) rises to a high altitude or the air temperature rises at high altitude, the gas inside the airbag expands, causing an increase in the pressure difference between the inside and outside. The airbag tends to expand outward, and its reverse binding force on the telescopic rod weakens. Under the action of the preset positive pressure and the spring thrust, the telescopic rod extends synchronously with the airbag, and the airbag volume increases synchronously to relieve the internal pressure. When the air temperature at high altitude decreases or the wind turbine (1) descends, the gas inside the airbag contracts, causing a decrease in the pressure difference between the inside and outside. The airbag tends to contract, and its reverse binding force on the telescopic rod strengthens. This pushes the telescopic rod to shorten synchronously with the airbag, and the airbag volume decreases to compensate for the pressure loss, ensuring that the pressure difference between the inside and outside of the airbag remains stable within a safe range. The main shaft (11) is transversely inserted through the center of the flat ellipsoidal airbag and fixed to the airbag through the flange (13). Multiple radial spokes are installed around the circumference of the flange. The airbag is heat-sealed with the curtain along both sides of the spokes. The spokes are tied to the airbag by passing ropes through the openings in the curtain, dispersing the local force and preventing the airbag from breaking.

[0022] The generator (2) is symmetrically installed at both ends of the main shaft (11). The output shaft of the generator's reducer is connected to the main shaft to ensure stable speed. The generator housing is equipped with a fixing ring for fastening the V-shaped cable.

[0023] The Y-shaped main cable (3) is made of high-strength flexible rope. Its two branches are respectively fixed to the generator (2) fixing ring. The upper end of the main cable is fixed to the two branches. The lower end is wound on the winch through the guide wheel of the ground winch (4). The ground winch is equipped with an electric drive mechanism, an electromagnetic braking device and an emergency mechanism to realize the stable release, positioning and emergency operation of the Y-shaped main cable main cable, thereby driving the wind turbine (1) to rise and fall synchronously.

[0024] The installation and operation process of this embodiment is as follows: 1. Installation preparation: Level the ground at the preset installation location, pour a concrete foundation, and firmly fix the ground winch; check the integrity and connection strength of each component, and pre-test the generator; test the differential pressure gauge and special air charging equipment to ensure the preset positive pressure charging accuracy and ensure normal function.

[0025] 2. Windmill Assembly: Complete the assembly of the left and right sleeve sets and sealing structures; install springs inside the sleeves and pre-tighten them; inflate the cylinder sealing cavity with a preset positive pressure using a dedicated inflation device, and then seal and maintain the pressure; pass the main shaft through the center hole of the airbag, and fix it to the airbag through the flange, ensuring a seal; install the spokes and tie them to the airbag with ropes; heat-seal the unidirectional arc-shaped wind blades on the outer arc surface of the airbag, ensuring a firm and sealed connection between the wind blades and the airbag; inflate the airbag with buoyancy gas (preferably helium, but hydrogen can also be used; if hydrogen is used, the explosion-proof device must be assembled in advance) using a dedicated device on the ground, let it stand to check for leaks, and then put it into use after passing the test.

[0026] 3. Suspension installation: Install the generator symmetrically at both ends of the main shaft, and complete the docking and fastening of the reducer output shaft with the main shaft; fix the two branches of the Y-shaped main cable to the generator fixing ring respectively, and after the upper end of the main cable and the branches converge and fix, wrap the lower end around the ground winch and ensure it is secure.

[0027] 4. Commissioning and Operation: Start the winch to release the Y-shaped main cable, suspend the wind turbine at the preset altitude, and lock the winch; monitor the pressure difference inside and outside the airbag using a differential pressure gauge to confirm that the telescopic rod is in balance with the airbag under the preset positive pressure and spring thrust; check the wind turbine attitude, generator position, and stability of each connection part. After confirming that there are no abnormalities, the wind turbine rotates under the action of wind power to drive the generator to generate electricity. The electricity is transmitted to the ground via cable for processing and then connected to the grid or supplied to users; no additional cylinder pressure adjustment is required during operation, and the telescopic rod adapts to the changes in airbag pressure difference.

[0028] 5. Post-maintenance: Monitor the system's operating status daily through the control unit and deal with any abnormalities promptly; periodically lower the wind turbine to the ground to check the blades, airbags, main shaft structure, and Y-shaped main cable condition, and perform maintenance on the generator. Once completed, resuspend and test the turbine until it is normal before resuming operation.

[0029] The high-altitude wind power generation system in this embodiment has been tested and has good environmental adaptability and operational reliability. It can stably cope with changes in the high-altitude environment and achieve efficient and stable power generation.

[0030] Another embodiment: For small high-altitude wind power generation equipment, in order to further simplify the system structure and reduce manufacturing costs, a pure spring or tension spring driven telescopic rod scheme can be adopted, omitting the cylinder telescopic mechanism and supporting special air filling equipment, air storage cylinder (12) and other components in the above embodiment.

[0031] The core structure of this embodiment is simplified as follows: the core structure of the wind turbine (1), generator (2), Y-shaped main cable (3), and ground winch (4) is the same as that of the above embodiment. The key improvement is in the telescopic drive mechanism of the main shaft (11) - the main shaft is still a coarse and fine sleeve structure (left sleeve + right sleeve), and a sealing ring is set at the joint to ensure the sealing performance of the airbag. The sleeve sealing cavity (cylinder) design is eliminated, and springs or tension springs are directly installed on the inner side of the left and right sleeve ends and pre-tightened. The continuous force is provided by the thrust of the spring or the tension of the tension spring, so that the telescopic rod always has the tendency to extend to the longest length. This force is restrained by the reverse force of the airbag to form a dynamic balance.

[0032] Its differential pressure regulation mechanism is as follows: When the pressure difference between the inside and outside of the airbag increases due to the high-altitude environment, the airbag expands outward, the reverse restraint force weakens, and the telescopic rod extends synchronously with the airbag under the force of the spring / tension spring, increasing the airbag volume to relieve pressure; when the pressure difference decreases, the airbag contracts, the reverse restraint force strengthens, pushing the telescopic rod to shorten synchronously, reducing the airbag volume to compensate for pressure loss, thus achieving adaptive and stable differential pressure regulation. A micro differential pressure gauge is still installed to monitor the pressure difference between the inside and outside of the airbag in real time, providing data for selecting the preload of the spring / tension spring.

[0033] The installation and operation process of this simplified embodiment is basically the same as the above embodiment, except that the steps of "injecting preset positive pressure into the cylinder" and "installing the air tank" are omitted. The remaining installation preparation, impeller assembly (only the sleeve assembly, spring / tension spring pre-tensioning, and main shaft and airbag fixing are completed), suspension installation, commissioning and operation, and subsequent maintenance are basically the same. No air pressure regulation equipment is required during operation. It relies entirely on the dynamic balance of the force between the spring / tension spring and the airbag to achieve adaptive adjustment.

[0034] The advantages of this solution are: it greatly simplifies the system structure, reduces the number of components (eliminating cylinders, inflation equipment, air tanks, etc.), and lowers manufacturing costs and installation difficulty; it eliminates the need for air pressure sealing and pressure regulation, further improving the operational reliability of small equipment, and making it easier to carry and deploy quickly, suitable for small-scale distributed high-altitude wind energy utilization scenarios (such as small-scale power supply in remote areas, temporary outdoor power supply, etc.).

Claims

1. A high altitude wind power generation system, characterized by, The system includes a wind turbine, a generator, a Y-shaped main cable, and a ground winch. The wind turbine is a flattened ellipsoidal airbag structure filled with buoyancy gas to achieve high-altitude hovering. Multiple unidirectional curved blades are heat-sealed to its outer arc surface, giving the turbine a unidirectional ratchet-like shape. A main shaft runs horizontally through the wind turbine. The main shaft is a cylinder formed by a coarse-fine fitting and mutually sealed sleeve structure. It can adaptively adjust the pressure difference inside and outside the airbag by positive or negative pressure and the force of springs or tension springs. A cylindrical air reservoir, communicating with the inner cavity, is fitted on the outer layer of the main shaft sleeve. The air reservoir pressure can be set once via external equipment. The generator is symmetrically installed at both ends of the main shaft and held below the main shaft by its own weight. Its reducer output shaft is connected to the main shaft. The Y-shaped main cable includes two branches and a main trunk. The two branches are bolted to the generators at both ends, and the main trunk connects to the ground winch. During operation, the lower blades unfold in the wind, and the upper blades are flattened, driving the wind turbine to rotate and powering the generator to generate electricity. The electricity is then processed and used on the ground.

2. The high-altitude wind power generation system of claim 1, wherein, The main shaft extension adjustment adopts a positive pressure / spring composite adjustment scheme: by filling the cylinder with a preset positive pressure, the spring provides a continuous thrust, so that the extension rod always has the force to extend to its maximum length. This force is always restrained by the force of the airbag. The extension rod is extended or retracted adaptively by the force of the airbag as the internal and external pressure difference changes, so as to achieve stable adjustment of the pressure difference.

3. The high-altitude wind power generation system of claim 1, wherein, A differential pressure gauge is installed on the flattened ellipsoidal airbag. The differential pressure gauge is electrically connected to the ground control unit and is used to monitor the pressure difference inside and outside the airbag in real time, providing data for cylinder pressure adjustment.

4. The high-altitude wind power generation system of claim 1, wherein, The pressure value of the air reservoir is set according to the airbag pressure difference adjustment requirements, and the volume should be sufficient to accommodate the maximum extension capacity of the telescopic rod while leaving a safety margin.

5. The high-altitude wind power generation system of claim 1, wherein, The Y-shaped main cable is made of high-strength flexible rope material. The main trunk slides in conjunction with the ground winch guide wheel. The main trunk is raised and lowered by rotating the winch, thereby adjusting the height of the wind turbine.

6. The high-altitude wind power generation system of claim 1, wherein, The main shaft is fixed to the flat ellipsoidal air bladder via a flange. Multiple radial spokes are installed around the circumference of the flange. The air bladders on both sides of the spokes are heat-sealed with curtains. The spokes are tied to the air bladders by ropes.

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