Lift-off auxiliary system

Abstract

The utility model relates to a lift-off auxiliary system which comprises a traction body, a balance umbrella and an auxiliary mechanism. The traction body is used for providing initial lift force for the high-altitude acting module, and the initial lift force guides the high-altitude acting module to rise to a first altitude; the balance umbrella is connected with the traction body, and after the balance umbrella is opened windward, the balance umbrella and the traction body jointly continue to guide the high-altitude acting module to a second altitude for acting; the auxiliary mechanism is respectively connected with the balance parachute and the high-altitude acting module, and comprises a traction rope and a control piece for controlling the release and recovery of the traction rope; when the wind speed at the first altitude is not enough to open the balance umbrella, the control piece releases the traction rope, and the traction body continues to rise until the wind speed is enough to open the balance umbrella. According to the scheme, through the auxiliary mechanism, the traction body can continuously drive the balance umbrella to the height at which the wind speed is enough to open the balance umbrella, hovering of the air acting module is avoided, and it is ensured that the umbrella-ladder combined type high-altitude wind energy acting module can still smoothly lift off to do work when the low-altitude wind speed is relatively low.

Description

Technical Field

[0001] The present disclosure relates to the technical field of high-altitude wind energy utilization, and in particular to a lifting auxiliary system. Background Art

[0002] High-altitude wind energy generally refers to mid- and high-altitude wind energy above 300 meters above the ground. With increasing altitude, average wind speeds increase, and the density of available wind energy also increases. Parachute-and-ladder combined high-altitude wind power generation systems are currently a common device for harnessing high-altitude wind energy. Because the parachute assembly, cables, and other aerial equipment are all heavy, relying solely on lift guides such as helium balloons or kites can only reach a limited altitude. Subsequently, a balance parachute must be deployed to assist in guiding the entire system to higher altitudes to capture high-altitude wind energy.

[0003] For example, CN101852178A discloses a high-power parachute-type wind turbine system, comprising a track rope, a lift guide, at least one parachute ladder, and a power generation device. The ladder comprises a load-bearing parachute (balance parachute) and a power-generating parachute. In this system, a kite or helium balloon is used as a guide to lift the balance parachute and power-generating parachute assembly to a suitable altitude. The balance parachute then deploys at a wind speed that reaches the desired deployment speed. Together with the guide, the system is lifted to a predetermined higher altitude to generate power.

[0004] However, during actual launch, once the guide pulls up the balance parachute, main cable, and the power parachute attached to the main cable, and the aerial equipment reaches a certain altitude, if the wind speed at the balance parachute's altitude has not yet reached the deployment speed, the entire parachute assembly will remain suspended in the air, unable to ascend further and, therefore, unable to deploy. Only when the wind speed at the balance parachute's location increases to reach the deployment speed can the system continue to ascend and reach the predetermined altitude range for the power parachute.

[0005] Increasing the buoyancy of the guide body (such as using a larger helium balloon) can only alleviate this problem to a certain extent, and will cause the equipment cost to rise sharply. Utility Model Content

[0006] The technical problem to be solved by the present disclosure is to prevent the balance parachute of a high-altitude wind energy working system from being unable to open due to too low wind speed, thereby affecting the working performance of the working parachute.

[0007] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0008] A lift-off auxiliary system includes a traction body, a balance parachute and an auxiliary mechanism;

[0009] The traction body is used to provide an initial lift for the high-altitude working module, and the initial lift guides the high-altitude working module to rise to a first altitude;

[0010] The balancing parachute is connected to the traction body, and after the balancing parachute is opened against the wind, it continues to guide the high-altitude work module to the second altitude to perform work together with the traction body;

[0011] The auxiliary mechanism is connected to the balance parachute and the high-altitude work module respectively, and includes a traction rope and a control member for controlling the release and recovery of the traction rope;

[0012] When the wind speed at the first altitude is insufficient to open the balance parachute, the control component releases the traction rope, and the traction body continues to rise until the wind speed is sufficient to open the balance parachute.

[0013] Preferably, the traction rope is wound inside the auxiliary mechanism, and a motor controls the release or recovery of the traction rope through a transmission member, and the motor is connected to a ground control center.

[0014] More preferably, the traction rope is wound on a drum, and the auxiliary mechanism is further provided with a locking member, the locking member is used to stop the rotation of the drum, and the locking member is connected to the motor or the ground control center.

[0015] Preferably, the auxiliary mechanism includes a rope guide, and the rope guide cooperates with the drum to arrange the traction rope evenly on the drum.

[0016] Preferably, a pulley assembly is provided at the upper end of the auxiliary mechanism, and the auxiliary mechanism is connected to the balancing parachute via an upper cable wound around the pulley assembly.

[0017] More preferably, the traction body includes a rotor, a main shaft and a drive assembly; the rotor has its own buoyancy and can rotate freely around the main shaft under force;

[0018] Both ends of the main shaft are symmetrically connected to the balance parachute. The drive assembly is used to adjust the rotation speed and / or direction of the rotor. The total weight of the rotor and the drive assembly is symmetrically distributed on the main shaft.

[0019] Preferably, the drive assembly includes a main drive motor, an energy storage module and a power generation module;

[0020] The power generation module is used to convert wind energy into electrical energy, the energy storage module is used to store the electrical energy and supply power to the main drive motor, and the main drive motor is used to adjust the rotation speed and / or direction of the rotor.

[0021] More preferably, the power generation module includes at least one first fan and at least one second fan respectively arranged on both sides of the rotor, the first fan and the second fan are respectively connected to a generator motor, and the generator motor is connected to the energy storage module.

[0022] Preferably, the first fan and the second fan are vertical axis fans.

[0023] More preferably, at least one of the first fan and the second fan is provided with an adjustment mechanism for adjusting the pitch angle of the fan blades.

[0024] The technical solution claimed in this disclosure has achieved the following beneficial effects:

[0025] 1) Releasing the traction rope through the auxiliary mechanism can enable the traction body to continue to drive the balance parachute to an altitude where the wind speed is sufficient to open it, thereby preventing the aerial work module from hovering in the air and ensuring that the parachute-ladder combined high-altitude wind energy work module can still be successfully lifted off and work when the wind speed at low altitude is relatively low, without having to wait for the wind speed to increase, thus avoiding wasting production time and improving work efficiency.

[0026] 2) Since the auxiliary mechanism can fully utilize the lift potential of the traction body and bring the balance parachute to a higher altitude, in areas with stable wind speeds, the auxiliary mechanism can be used with a smaller traction body (such as a helium balloon) for lifting operations, thereby greatly saving the cost of using the traction body.

[0027] 3) By using a Magnus effect rotor as a guide body, the use of helium can be further reduced. By adjusting the speed and / or direction of the rotor, any required lift can be obtained, and the lift of the aerial tether can be flexibly controlled without being restricted by altitude.

[0028] 4) Darrieus turbines offer high power conversion efficiency, continuously providing the required power for the rotor and other electrical devices in the lift-off support system. Furthermore, because the pitch angle of the Darrieus turbine blades can be adjusted according to actual high-altitude environmental conditions, it maintains an optimal angle of attack, maximizing power generation efficiency.

[0029] 5) By adjusting the pitch angles of the Darrieus-type wind turbine blades on both sides of the rotor respectively, the auxiliary lift system can undergo a predetermined horizontal deflection in a certain altitude. When the adjustment of the pitch angle of the wind turbine blades is combined with the adjustment of the rotor steering / speed, the tethered system can further achieve synchronous position transfer in the horizontal and vertical directions within a certain spatial range, which is beneficial for situations such as space obstacle avoidance or space maneuvering. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are merely embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0031] Figure 1 This is a schematic diagram of the structure of the high-altitude work module including the lift-off auxiliary system.

[0032] Figure 2 Schematic diagram of the internal structure of the auxiliary mechanism.

[0033] Figure 3 Schematic diagram of the three stages of assisted takeoff by the lift assist system.

[0034] Figure 4 The figure is a schematic diagram of the structure of a high-altitude work module of a lift-off auxiliary system that uses a Magnus effect rotor as a traction element.

[0035] Figure 5 Schematic diagram of the Magnus effect rotor structure.

[0036] Reference numerals:

[0037] 100-traction body; 200-balance parachute; 300-auxiliary mechanism; 301-upper cable; 302-pulley; 303-pulley mounting shaft; 304-housing; 305-motor; 306-battery; 307-transmission and locking assembly; 308-drum; 309-rope guide; 400-traction rope; 500-working parachute; 600-main cable; 700-ground equipment; 800-rotor; 801-mounting main shaft; 802-first vertical axis fan; 803-first generator motor; 804-main drive motor; 805-second vertical axis fan; 806-second generator motor; 807-traction bracket. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and beneficial effects of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0039] Example 1

[0040] This embodiment provides a lift-off assist system. Figure 1As shown, the system mainly consists of a traction body 100, at least one balance parachute 200, and an auxiliary mechanism 300. The balance parachute 200 is connected to the traction body 100, and the auxiliary mechanism 300 is respectively connected to the balance parachute 200 and the high-altitude working module. The auxiliary mechanism 300 includes a traction rope 400 and a control component that controls the release and recovery of the traction rope 400. Among them, the traction body 100 is used to provide initial lift for the high-altitude working module. This initial lift guides the lift-off auxiliary system and the high-altitude working module to a first altitude. When the wind at the first altitude is strong enough, the balance parachute 200 opens to face the wind and, together with the traction body 100, continues to guide the high-altitude working module to a second altitude where the wind speed is sufficient to perform work. When the wind speed at the first altitude is insufficient to open the balance parachute 200, the control component of the auxiliary mechanism 300 releases the traction rope 400.

[0041] Among them, the traction body 100 in this embodiment can be a helium balloon or a kite, etc. When the balance parachute 200 opens against the wind, it can further provide continuous lift, and together with the traction body 100, guide the aerial work module to a predetermined altitude range to start working, and at the same time balance the weight of the system during the working process. The auxiliary mechanism 300 stores a certain length of traction rope 400 inside it, and is connected to the aerial work module through the traction rope 400. At least one work parachute 500 is set on the main cable 600 of the aerial work module. When the work parachute 500 is opened, it can capture high-altitude wind energy and generate huge traction on the main cable 600, thereby pulling the ground equipment 700 to work or generate electricity.

[0042] Specifically, during the launch of the aerial work module, due to cost and practical needs, the traction body 100 generally provides only limited lift, and the weight balance of the aerial work module is primarily maintained by the balance parachute 200. The lift provided by the balance parachute 200 is proportional to the windward area and the square of the wind speed. Therefore, the smooth deployment of the balance parachute 200 is crucial to the launch of the aerial work module.

[0043] When the wind conditions near the ground are good, before the traction body 100 rises to the maximum hovering height, the balance parachute 200 will obtain the wind speed required for the parachute to open, thereby smoothly opening the parachute and continuing to tow the aerial working module together with the traction body 100 to reach the predetermined altitude. Then the working parachute 500 will also open smoothly under the action of wind and capture high-altitude wind energy to perform work or generate electricity.

[0044] When wind conditions near the ground are poor, even if the traction body 100 has reached the hovering altitude, the balance parachute 200 may still not reach the required wind speed for deployment. In this situation, traditional launch methods can only allow the high-altitude work module to hover and wait for wind, resulting in a significant waste of operating time. In this embodiment, by continuing to release the traction rope 400 through the auxiliary mechanism 300, the traction body 100 can continue to carry the balance parachute 200 to a higher altitude after reaching the hovering altitude. Generally, the higher the altitude, the greater the wind speed. As the balance parachute 200 continues to rise and gradually reaches the altitude where the wind speed for deployment occurs, it will successfully deploy.

[0045] Figure 2 The internal structure diagram of the auxiliary mechanism 300 is shown as an example. The auxiliary mechanism 300 mainly includes components such as a housing 304, a motor 305, a battery 306, a transmission and locking assembly 307, a drum 308, a rope guide 309, a pulley assembly, and a wireless communication module for communicating with the ground control center. The transmission and locking assembly 307 includes a transmission member and a locking member, and the pulley assembly includes a pulley 302 and a pulley mounting shaft 303. The auxiliary mechanism 300 is usually installed at the bottom of the balance parachute 200, and can also be installed between two balance parachute 200 groups as needed. The upper part of the auxiliary mechanism 300 is connected to the balance parachute 200 above by an upper cable. The lower end of the upper cable is wrapped around the pulley assembly of the auxiliary mechanism 300 to reduce friction during traction. The battery supplies power to various power-consuming modules such as the motor inside the auxiliary mechanism 300.

[0046] In the exemplary structure, the traction rope 400 is wound on the drum 308, and both ends of the drum 308 are fixed to the side walls of the shell 304. The motor 305 controls the rotation of the drum 308 through a transmission member (such as a gear), thereby controlling the release or recovery of the traction rope 400. In addition, the motor or the ground control center can lock the drum 308 in the non-actuated state by controlling the locking member to maintain reliable braking of the lift assist system. In the preferred structure, the traction rope 400 can be retracted and released with reference to the rope retraction and release structure of the winch. The rope guide 309 can also be set with reference to the winch, and the rope guide 309 cooperates with the drum 308 to ensure that the traction rope 400 is evenly arranged on the drum. Reference Figure 2 The rotation of the shaft where the drum and the rope guide are located can be connected by gears or sprockets. The rotation of the shaft of the drum and the rope guide can be synchronized according to the preset speed ratio, so that when the drum rotates one circle, the rope guide can be evenly translated by a distance of a rope diameter.

[0047] Figure 3 The process of assisted lift-off using the assisted lift-off system in this embodiment is shown, which is divided into three stages.

[0048] Phase 1 is the initial liftoff process. The traction body 100 pulls each aerial device into the air sequentially, gradually reaching a hovering altitude. If the balance parachute 200 reaches the required wind speed before reaching the hovering altitude, it deploys smoothly and, together with the traction body 100, continues to pull the aerial power module to the predetermined altitude, successfully completing the liftoff of the parachute-ladder combined high-altitude wind turbine power module. Next, the aerial power module deploys the power parachute 500 according to a predetermined program to capture high-altitude wind energy and pull the ground-based equipment 700 to generate power or generate electricity.

[0049] If the wind speed has not reached the deployment speed for the parachute 200 after the traction body 100 reaches its hovering altitude, the aerial work module will temporarily remain suspended in mid-air, and the system will enter Phase 2. At this point, the ground control system sends a command to the auxiliary mechanism 300. Upon receiving the command, the auxiliary mechanism 300 releases the locking member and, under the control of the motor, releases the traction rope 400 at a predetermined speed. The traction body 100 then transitions from the hovering state to a continued ascent, leading the parachute 200 and the auxiliary mechanism 300 to a higher altitude until the parachute 200 reaches the deployment wind speed. During this process, the aerial devices below the traction rope 400 remain in a hovering, waiting state. When the parachute 200 reaches the deployment wind speed, the auxiliary mechanism 300 brakes the drum using the locking member, stopping the release of the traction rope 400, and the parachute 200 will then open into the wind.

[0050] Next, the third stage begins. The balance parachute 200, along with the traction body 100, pulls all aerial work equipment to a predetermined altitude range. The power parachute 500 will also deploy at the predetermined altitude, capturing the powerful high-altitude wind energy and driving ground equipment to perform work or generate electricity via the main cable 600. Specifically, if necessary, after the power parachute 500 deploys, the balance parachute 200 can be temporarily closed, ensuring that the tension in the traction rope 400 is lower than the driving capacity of the auxiliary mechanism 300's motor, allowing the auxiliary mechanism 300 to properly retract the rope. The auxiliary mechanism 300 then re-locks the drum and reopens the balance parachute 200 to balance the aerial system's counterweight. The adjustment mechanism for actively closing or opening the balance parachute 200 is controlled by a ground control center. The specific opening and closing method of the balance parachute 200 can be the same as that of the existing power parachute 500, and this is not limited to this.

[0051] In the preferred solution, by monitoring the real-time wind conditions and altitude, the integrated control of stage one and stage two can be achieved through the automatic control system without the need for human intervention, thereby achieving autonomous and stable ascent of the various aerial components of the parachute ladder power system.

[0052] In this embodiment, the traction rope is released by the auxiliary mechanism, so that the traction body can continue to drive the balance parachute to an altitude where the wind speed is sufficient to open it, thereby preventing the aerial work module from hovering in the air, and ensuring that the parachute-ladder combined high-altitude wind energy work module can still be successfully lifted off and work when the low-altitude wind speed is relatively low, without having to wait for the low-altitude wind speed to increase, thereby avoiding wasting production time and improving work efficiency.

[0053] Moreover, since the auxiliary mechanism can fully utilize the lift potential of the traction body and bring the balance parachute to a higher altitude, in areas with stable wind speeds, the auxiliary mechanism can be used in combination with a smaller traction body for lifting operations, thereby greatly saving the cost of using the traction body.

[0054] Example 2

[0055] Traditional floating objects such as helium balloons, used as traction body 100, have uncontrollable lift-to-drag ratios during ascent. This can easily cause the various devices attached to the main cable 600 to repeatedly rise and fall, even risking grounding, significantly challenging ascent safety. Therefore, this embodiment utilizes a more stable device with a controllable lift-to-drag ratio as traction body 100. This embodiment differs from Example 1 only in the specific configuration of traction body 100; the remaining configurations refer to Example 1.

[0056] The traction body 100 in this embodiment includes a rotor 800, a mounting main shaft 801, and a drive assembly. The rotor 800 has its own buoyancy and can rotate freely around the mounting main shaft 801 under force. Traction brackets 807 are symmetrically provided at both ends of the mounting main shaft 801. The traction brackets 807 are connected to the balance parachute 200 through symmetrical Y-shaped connecting cables. The drive assembly is used to adjust the speed and / or direction of the rotor 800. The total weight of the rotor 800 and the drive assembly is symmetrically distributed on the mounting main shaft 801. In a preferred embodiment, the drive assembly includes a main drive motor 804, an energy storage module, and a power generation module. The power generation module is used to convert wind energy into electrical energy. The energy storage module is used to store electrical energy and power the main drive motor. The main drive motor 804 is connected to the ground control center and is used to adjust the speed and / or direction of the rotor.

[0057] The rotor 800 in this embodiment is a Magnus effect rotor. Figure 4 This is a schematic diagram of a parachute-ladder combined high-altitude wind energy system using a Magnus effect rotor as the traction body 100. It enables stable and controllable lift of the system, while significantly reducing the amount of buoyancy gas required to provide the same lift, greatly reducing gas costs.

[0058] Figure 5A schematic diagram of the main structure of a Magnus effect rotor traction body is shown. All components of the traction body 100 are symmetrically mounted on a lightweight, strong mounting shaft 801. At the center is a cylindrical Magnus effect rotor. The outer surface of rotor 800 is made of a material with strong sealing properties, radiation resistance, light weight, and a certain degree of toughness, preferably a multi-layer structure. The interior of rotor 800 is hollow, with lightweight rigid supports appropriately positioned to maintain its shape. The interior of rotor 800 is filled with helium or a helium-hydrogen mixture to provide initial lift.

[0059] The Magnus-effect rotor is driven by a main drive motor 804 and can freely rotate forward or reverse around the main mounting shaft 801. At least two vertical-axis fans, namely a first vertical-axis fan 802 and a second vertical-axis fan 805, are symmetrically positioned at either end of the main mounting shaft 801. These vertical-axis fans are preferably Darrieus-type fans. When the first and second vertical-axis fans 802 and 805 rotate in response to wind, they respectively drive the first and second generator motors 803 and 806 to generate electricity. The converted electrical energy is stored in real time in an energy storage module and can also be used to provide sufficient, sustainable power for various electrical devices on the traction body 100, in addition to the main drive motor.

[0060] In this embodiment, since Darrieus blowers are generally difficult to start, the first generator motor 803 and the second generator motor 806 first obtain electrical energy from the energy storage module to drive the first vertical axis blower 802 and the second vertical axis blower 805 to reach the starting speed. When the first vertical axis blower 802 and the second vertical axis blower 805 achieve stable rotation, they switch to the power generation mode.

[0061] During the launch of the system, the Magnus effect rotor is filled with helium or a helium-hydrogen mixture, which can provide a certain initial buoyancy force to keep the traction body aloft. According to the Kutta-Joukowski formula:

[0062] L=-ρv ∞ Γb

[0063] That is, when the incoming flow velocity is v ∞ When a fluid has a circulation around a cylinder, the lift L exerted by the fluid on the rotating cylinder of length b is the fluid density ρ, the incoming flow velocity v ∞ Therefore, as long as the wind speed is not zero, the lift perpendicular to the wind speed direction can be obtained by driving the Magnus effect rotor to rotate through the main drive motor.

[0064] like Figure 5As shown, if wind blows from the left toward tractor 100, the main drive motor drives rotor 800 to rotate clockwise at the angle shown in the figure, generating a controllable upward lift perpendicular to the wind direction. Therefore, by monitoring wind speed and altitude in real time and controlling the rotational speed of the Magnus effect rotor, the lift of tractor 100 can be adjusted in real time, guiding the stable ascent of the various aerial modules of the parachute-ladder combined high-altitude wind energy system.

[0065] Similar to Example 1, if the wind conditions near the ground are good, the Magnus effect rotor traction body can directly bring the balance parachute 200 to the wind speed range required for parachute opening. The balance parachute 200 then opens and, together with the traction body 100, pulls each aerial system to reach the predetermined working altitude range.

[0066] If wind conditions near the ground are poor and the Magnus-effect rotors in the tractor 100 are unable to generate sufficient lift through their own rotation, the auxiliary mechanism 300 releases the towing rope 400, allowing the tractor 100 to continue pulling the balance parachute 200 to a higher altitude while maintaining limited lift, achieving the desired deployment wind speed. The balance parachute 200 then deploys and, together with the tractor 100, pulls the various aerial systems to the predetermined operating altitude range.

[0067] In the preferred solution, since the lift of the Magnus effect rotor traction body is controllable, especially the lift will be downward during reversal, the balance parachute 200 can be used to coordinate with the opening and closing parachute to control the tension of the traction rope 400 below the auxiliary mechanism 300 after the power parachute 500 is opened, so that the motor 305 in the auxiliary mechanism 300 can smoothly drive the roller 308 to retract the traction rope 400 to an appropriate length, which is more conducive to the control of the aerial system.

[0068] More preferably, the Magnus-effect rotor traction body can not only guide the aerial system to achieve vertical maneuverability, but also, through an adjustment mechanism, dynamically adjust the pitch angle of the Darrieus blower's blades, disrupting the symmetrical balance of the traction body 100, thereby enabling the traction body 100 to achieve a certain amount of horizontal deflection in mid-air and regain balance. In other words, the traction body 100 can guide the aerial system to achieve certain maneuverability in the horizontal space direction. In this embodiment, the adjustment mechanism can be implemented in the form of a cam follower or an eccentric wheel, etc., without limitation.

[0069] Combining adjustments to the wind turbine blade pitch angle with those to the rotor's direction and speed allows the lift-off assist system to simultaneously shift its position horizontally and vertically within a specific spatial range, facilitating spatial obstacle avoidance and maneuvering. Compared to tethering solutions like helium balloons, this embodiment not only allows for flexible spatial maneuvers, but also features a simpler control method, a wider control range, and superior maneuverability.

[0070] The embodiments and application examples described above are merely illustrative descriptions of the present disclosure and do not limit the scope of the present disclosure. Without departing from the design spirit of the present disclosure, various modifications and improvements made to the technical solutions of the present disclosure by ordinary technicians in this field should fall within the protection scope determined by the present disclosure.

Claims

1. A lift-off assist system, characterized in that: It includes a traction body, a balance parachute and an auxiliary mechanism; The traction body is used to provide an initial lift for the high-altitude working module, and the initial lift guides the high-altitude working module to rise to a first altitude; The balancing parachute is connected to the traction body, and after the balancing parachute is opened against the wind, it continues to guide the high-altitude work module to the second altitude to perform work together with the traction body; The auxiliary mechanism is connected to the balance parachute and the high-altitude work module respectively, and includes a traction rope and a control member for controlling the release and recovery of the traction rope; When the wind speed at the first altitude is insufficient to open the balance parachute, the control component releases the traction rope, and the traction body continues to rise until the wind speed is sufficient to open the balance parachute.

2. The lift-off assist system according to claim 1, characterized in that: The traction rope is wound and arranged in the auxiliary mechanism, and the motor controls the release or recovery of the traction rope through a transmission member, and the motor is connected to a ground control center.

3. The lift-off assist system according to claim 2, characterized in that: The traction rope is wound on a drum, and the auxiliary mechanism is further provided with a locking member, which is used to stop the rotation of the drum. The locking member is connected to the motor or the ground control center.

4. The lift-off assist system according to claim 3, characterized in that: The auxiliary mechanism includes a rope arranging device, and the rope arranging device cooperates with the drum to arrange the traction rope evenly on the drum.

5. The lift-off assist system according to claim 2, characterized in that: A pulley assembly is provided at the upper end of the auxiliary mechanism, and the auxiliary mechanism is connected to the balancing parachute via an upper cable wound around the pulley assembly.

6. The lift-off assist system according to any one of claims 1 to 5, characterized in that: The traction body includes a rotor, a main shaft and a drive assembly; the rotor has its own buoyancy and can rotate freely around the main shaft under force; Both ends of the main shaft are symmetrically connected to the balance parachute. The drive assembly is used to adjust the rotation speed and / or direction of the rotor. The total weight of the rotor and the drive assembly is symmetrically distributed on the main shaft.

7. The lift-off assist system according to claim 6, characterized in that: The drive assembly includes a main drive motor, an energy storage module and a power generation module; The power generation module is used to convert wind energy into electrical energy, the energy storage module is used to store the electrical energy and supply power to the main drive motor, and the main drive motor is used to adjust the rotation speed and / or direction of the rotor.

8. The lift-off assist system according to claim 7, characterized in that: The power generation module includes at least one first fan and at least one second fan respectively arranged on both sides of the rotor, the first fan and the second fan are respectively connected to a generator motor, and the generator motor is connected to the energy storage module.

9. The lift-off assist system according to claim 8, characterized in that: The first fan and the second fan are vertical axis fans.

10. The lift-off assist system according to claim 8, characterized in that: At least one of the first fan and the second fan is provided with an adjustment mechanism for adjusting the pitch angle of the fan blades.

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