Aerostat with built-in pressure adjusting structure, wind power generation system and control method

Abstract

The invention discloses an aerostat with a built-in pressure adjusting structure, a wind power generation system and a control method, the aerostat of one embodiment comprises an auxiliary air bag, the pressure adjusting structure arranged in the auxiliary air bag and a pressure control structure arranged outside the auxiliary air bag, the pressure adjusting structure comprises an air duct pipe, a first valve arranged at one end of the air duct pipe, a second valve arranged at the other end of the air duct pipe and a fan arranged in the air duct pipe and located between the first valve and the second valve. The pressure control structure comprises a controller and a differential pressure sensor, and the controller is used for controlling the fan, the first valve and the second valve to exhaust or inflate the auxiliary air bag according to the air pressure, sensed by the differential pressure sensor, of the bag body. According to the embodiment, the pressure adjusting structure of the aerostat is integrally arranged in the auxiliary air bag, the beneficial effects of being compact in structure, good in air tightness and the like are achieved, the stability and reliability of the aerostat are remarkably improved, and the practical application value is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to an aerostat with an internal pressure regulating structure, a wind power generation system and a control method. Background Art

[0002] The high-altitude wind power generation system uses a floating platform to bring a wind turbine to an altitude of 500m - 10,000m. Utilizing the advantages of stable high-altitude wind energy, large wind speed, large power generation capacity, and stable output power, it is a wind power generation product with broad application prospects.

[0003] The pressure regulating device of the floating platform of the high-altitude wind power generation system consists of a fan assembly and a valve. The fan assembly consists of a fan, a check valve, and a flange. When installing, holes are opened at corresponding positions on the bladder, and the fan assembly and the valve assembly are installed on the bladder through flange connections. The following problems exist:

[0004] 1. Problems of fan flow rate and static pressure loss: The fan assembly uses a check valve. When the check valve is not activated, it is sealed by spring force. After the fan is started, the air flow flushes open the valve cover of the check valve and inflates the airbag. The air flow needs to overcome the elastic force of the check valve, resulting in problems of static pressure and flow rate loss of the fan;

[0005] 2. The pressure regulating device has poor sealing performance, fast leakage, and cannot adapt to the pressure regulation of high-pressure annular wings. In order to reduce the loss of fan static pressure and flow rate, the spring force of the check valve cannot be set too high, resulting in poor sealing performance of the check valve. Under high-pressure conditions, the gas leakage rate is too fast, and it is only applicable to bladders with a pressure within 1000Pa and cannot be used for bladder pressure regulation exceeding kPa;

[0006] 3. Split structure, inconvenient installation: The fan assembly and the valve assembly are independent structures, and the installation form using a flange to connect with the bladder requires installing two flanges separately during assembly, and the installation is relatively complex.

[0007] 4. There is no dehumidification structure, and the water condensed and accumulated in the bladder cannot be automatically discharged. It needs to be manually discharged after recovery and mooring, and the operation is complex. Summary of the Invention

[0008] In order to solve at least one of the above problems, the first embodiment of the present invention provides an aerostat based on an internal pressure regulating structure, including an auxiliary airbag, a pressure regulating structure disposed inside the auxiliary airbag, and a pressure control structure disposed outside the auxiliary airbag, wherein,

[0009] The pressure regulating structure includes an air duct, a first valve disposed at one end of the air duct, a second valve disposed at the other end of the air duct, and a fan disposed in the air duct between the first valve and the second valve;

[0010] The pressure control structure includes a controller and a differential pressure sensor. The controller is configured to control the exhaust or inflation of the auxiliary airbag by the blower, the first valve, and the second valve according to the air pressure of the bladder sensed by the differential pressure sensor.

[0011] For example, in the aerostat provided in some embodiments of the present application, the pressure regulating structure further includes a valve motor, a reduction gearbox, a valve connecting rod, a first bevel gear, and a second bevel gear disposed outside the air duct pipe, wherein

[0012] The valve connecting rod includes a first end and a second end. The first end of the valve connecting rod drives the first valve through the first bevel gear, and the second end of the valve connecting rod drives the second valve through the second bevel gear;

[0013] The valve motor drives the valve connecting rod through the reduction gearbox.

[0014] For example, in the aerostat provided in some embodiments of the present application, the pressure regulating structure further includes a first valve driving device and a second valve driving device disposed outside the air duct pipe, wherein

[0015] The first valve driving device includes a first valve motor for driving the first valve;

[0016] The second valve driving device includes a second valve motor for driving the second valve.

[0017] For example, in the aerostat provided in some embodiments of the present application, the first valve, the air duct pipe, and the blower form a first cavity. The aerostat further includes a first drying chamber disposed on the pipe wall of the air duct pipe in the first cavity. The first drying chamber includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber;

[0018] The second valve, the air duct pipe, and the blower form a second cavity. The aerostat further includes a second drying chamber disposed on the pipe wall of the air duct pipe in the second cavity. The second drying chamber includes a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber;

[0019] The aerostat further includes a drying push rod disposed outside the air duct pipe, and a drying connecting rod respectively connected to the first drying valve cover and the second drying valve cover. The drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod.

[0020] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags;

[0021] The pressure control structure includes sub-control structures corresponding to respective sub-airbags, and each sub-control structure is disposed at the bottom of the corresponding sub-airbag.

[0022] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags;

[0023] The pressure control structure includes sub-control structures corresponding to respective sub-airbags, the aerostat includes a console, and each sub-control structure is disposed within the console.

[0024] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a first opening, a first flange is provided at the first opening, and the first flange includes a first mounting portion;

[0025] The air duct further includes a second flange disposed on a side close to the first valve, and the second flange includes a second mounting portion for fixing to the first mounting portion.

[0026] The second embodiment of the present invention provides a wind power generation system, including the aerostat as described in the first embodiment, and a wind power generator carried by the aerostat.

[0027] The third embodiment of the present invention provides a control method applied to the wind power generation system as described in the second embodiment, including:

[0028] The controller of the pressure control structure controls the fan, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the differential pressure sensor.

[0029] For example, in the control method provided in some embodiments of the present application, the controller of the pressure control structure controlling the fan, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the differential pressure sensor further includes:

[0030] When the air pressure of the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open, and controls the fan to rotate reversely to discharge the gas in the auxiliary airbag until the air pressure of the airbag is less than or equal to a second threshold;

[0031] When the air pressure of the airbag is less than a preset third threshold, the controller controls the first valve and the second valve to open, and controls the fan to rotate forward to fill the auxiliary airbag with ambient air until the air pressure of the airbag is greater than or equal to a fourth threshold.

[0032] For example, in the control method provided by some embodiments of the present application, the first valve, the air duct, and the fan form a first cavity. The aerostat further includes a first drying chamber provided on the pipe wall of the air duct in the first cavity. The first drying chamber includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber. The second valve, the air duct, and the fan form a second cavity. The aerostat further includes a second drying chamber provided on the pipe wall of the air duct in the second cavity. The second drying chamber includes a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber. The aerostat further includes a drying push rod provided outside the air duct and a drying connecting rod respectively connected to the first drying valve cover and the second drying valve cover. The drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod. The control method further includes:

[0033] In the static working mode, the controller controls the first valve and the second valve to close, controls the fan to close, and controls the first drying valve cover and the second drying valve cover to close;

[0034] In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to rotate reversely, and controls the first drying valve cover and the second drying valve cover to open, so that the gas in the auxiliary airbag sequentially passes through the first desiccant in the first drying chamber and the second desiccant in the second drying chamber to dehumidify the gas in the auxiliary airbag;

[0035] In the desiccant dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to close, controls the first drying valve cover and the second drying valve cover to close, controls the first heating film to heat the first desiccant and controls the second heating film to heat the second desiccant, so that the moisture of the first desiccant and the second desiccant evaporates.

[0036] The beneficial effects of the present invention are as follows:

[0037] In view of the existing problems at present, the present invention formulates an aerostat, a wind power generation system, and a control method with a built-in pressure regulating structure. By integrally arranging the first valve, the second valve, and the fan of the pressure regulating structure of the aerostat in the air duct, and arranging the air duct inside the auxiliary airbag, the pressure regulating structure responds to the control of the controller of the pressure control structure arranged outside the auxiliary airbag to perform actions, so as to exhaust or inflate the auxiliary airbag. In this embodiment, the pressure regulating structure is integrally arranged inside the auxiliary airbag, which has the characteristics of compact structure, high pressure, good air tightness, convenient installation, good maintainability, and good protection, thus making up for the problems existing in the prior art, significantly improving the stability and reliability of the wind power generation system arranged at high altitude, and having practical application value. Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 A structural block diagram of the aerostat according to an embodiment of the present invention is shown;

[0040] Figure 2 A schematic structural diagram of the air duct according to an embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram of the static working mode according to an embodiment of the present invention is shown;

[0042] Figure 4 A schematic diagram of the inflation mode according to an embodiment of the present invention is shown;

[0043] Figure 5 A schematic diagram of the dehumidification mode according to an embodiment of the present invention is shown;

[0044] Figure 6 A structural block diagram of the wind power generation system according to an embodiment of the present invention is shown. Detailed Embodiments

[0045] In order to more clearly illustrate the present invention, the following further describes the present invention in combination with preferred embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0046] In view of the problems existing in the prior art, an embodiment of the present invention provides an aerostat based on an internal pressure regulating structure, including an auxiliary airbag, a pressure regulating structure disposed inside the auxiliary airbag, and a pressure control structure disposed outside the auxiliary airbag, wherein,

[0047] The pressure regulating structure includes an air duct, a first valve disposed at one end of the air duct, a second valve disposed at the other end of the air duct, and a fan disposed in the air duct between the first valve and the second valve;

[0048] The pressure control structure includes a controller and a differential pressure sensor. The controller is configured to control the fan, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the differential pressure sensor.

[0049] In this embodiment, as Figure 1 shown is a structural block diagram of the aerostat of the present invention. The aerostat includes a main airbag (not shown in the figure) and auxiliary airbags. The auxiliary airbags include, for example, a secondary airbag, a tail fin airbag, and a ring wing airbag. Among them, the main airbag is filled with helium gas, which is used to provide buoyancy and support the installation of the wind turbine of the wind power generation system when the aerostat is applied to the wind power generation system; the other airbags are auxiliary airbags filled with air. Among them, the secondary airbag is used to maintain the shape of the main airbag, and the tail fin airbag and the ring wing airbag are used to improve the aerial stability performance and the fixed-point ability of the aerostat. Each airbag is an airtight independent airbag. The tail fin airbag includes 4 airbags arranged at the tail of the main airbag and distributed at a 90° angle; the ring wing airbag includes 4 airbags respectively fixed at the top of the tail fin airbag.

[0050] In this embodiment, as Figure 2The figure shows a partial schematic diagram of an auxiliary airbag. Among them, the auxiliary airbag 30 includes a first opening 31, and a first flange 32 is provided at the first opening 31. The first flange 32 includes a first mounting portion 321. The pressure regulating structure is arranged inside the first opening 31 of the auxiliary airbag and includes an air duct 10, a first valve 11 arranged at one end of the air duct 10, a second valve 12 arranged at the other end of the air duct 10, and a fan 13 arranged in the air duct 10 between the first valve 11 and the second valve 12. The fan 13 in the air duct 10 operates in response to the controller of the external pressure control structure according to the air pressure in the airbag sensed by the differential pressure sensor. For example, the fan 13 rotates forward or reversely according to the applied voltage. At the same time, the first valve 11 and the second valve 12 open or close in response to the control of the controller, so as to exhaust or inflate the auxiliary airbag through the fan 13, the first valve 11 and the second valve 12 integrated in the air duct 10; the differential pressure sensor includes a first end and a second end. The first end collects the ambient air pressure, and the second end is connected to the airbag body of the auxiliary airbag to measure the pressure difference between the inside of the airbag body of the auxiliary airbag and the ambient air pressure; the pressure control structure of this embodiment is arranged on the circuit board or control board outside the auxiliary airbag. At the same time, in this embodiment, the air duct 10 further includes a second flange 19 arranged on the side close to the first valve 11. The second flange 19 includes a second mounting portion 191 for fixing with the first mounting portion 321. That is, the air duct 10 is installed and fixed to the first mounting portion 321 of the first flange 32 at the outlet position of the first opening 31 of the auxiliary airbag 30 through the second mounting portion 191 of the second flange 19. Compared with the situation in the related art where an independent structure of a fan assembly and a valve assembly is used inside the auxiliary airbag for exhausting or inflating and flange plates are used for installation according to different structures respectively, in this embodiment, the first valve, the second valve and the fan are integrated in the air duct, effectively simplifying the pressure regulating structure, and at the same time having the characteristics of convenient installation and maintenance, effectively improving the overall stability performance and assembly performance of the aerostat, and effectively reducing the manufacturing cost of the aerostat.

[0051] In a specific embodiment, as Figure 2 shown, the pressure regulating structure further includes a valve motor 14, a reduction gearbox 15, a valve connecting rod 16, a first bevel gear 17 and a second bevel gear 18 arranged outside the air duct. Among them, the valve connecting rod 16 includes a first end and a second end. The first end of the valve connecting rod 16 drives the first valve 11 through the first bevel gear 17, and the second end of the valve connecting rod 16 drives the second valve 12 through the second bevel gear 18; the valve motor 14 drives the valve connecting rod 16 through the reduction gearbox 15.

[0052] In this embodiment, considering the overall manufacturing cost and control requirements of the aerostat, a set of linked actuating devices is provided outside the air duct 10 to synchronously drive the actions of the first valve 11 and the second valve 12. Specifically, the first valve 11 is connected to a first bevel gear 17, that is, the opening and closing of the first valve 11 are driven by the first bevel gear 17; similarly, the second valve 12 is connected to a second bevel gear 18, that is, the opening and closing of the second valve 12 are driven by the second bevel gear 18; at the same time, both ends of the valve connecting rod 16 are respectively connected to the first bevel gear 17 and the second bevel gear 18, and the valve connecting rod is connected to the reduction gearbox 15, and the reduction gearbox 15 is driven by the valve fan 14.

[0053] During the actual working process, when the differential pressure sensor of the pressure control structure arranged outside the auxiliary airbag senses the air pressure in the airbag, the controller transmits control signals to the fan 13 and the valve motor 14 according to the sensed air pressure in the airbag. For example, when the air pressure in the airbag is greater than a preset first threshold, such as greater than the maximum high-pressure threshold for the safe operation of the auxiliary airbag, the controller sends an exhaust signal to the fan 13 to make the fan reverse, sends a valve opening signal to the valve motor 14, the valve motor 14 drives the reduction gearbox 15 to control the action of the valve connecting rod 16, and the first valve 11 and the second valve 12 are respectively opened through the first bevel gear 17 and the second bevel gear 18, and the air in the airbag is discharged through the second valve 12, the fan 13 and the first valve 11 until the air pressure in the airbag is less than or equal to a preset second threshold, such as less than or equal to the minimum high-pressure threshold for the safe operation of the auxiliary airbag; the controller sends a shutdown signal to the fan 13 to stop the fan, sends a valve closing signal to the valve motor 14, the valve motor 14 drives the reduction gearbox 15 to control the action of the valve connecting rod 16, and the first valve 11 and the second valve 12 are respectively closed through the first bevel gear 17 and the second bevel gear 18.

[0054] Similarly, when the air pressure in the airbag is less than the minimum low-pressure threshold for the safe operation of the preset auxiliary airbag, the controller sends an inflation signal to the fan 13 to make the fan rotate forward, sends a valve opening signal to the valve motor 14, the valve motor 14 drives the reduction gearbox 15 to control the action of the valve connecting rod 16, and the first valve 11 and the second valve 12 are respectively opened through the first bevel gear 17 and the second bevel gear 18, and ambient air is filled into the auxiliary airbag through the first valve 11, the fan 13 and the second valve 12 until the air pressure in the airbag is greater than or equal to the maximum low-pressure threshold for the safe operation of the preset auxiliary airbag; the controller sends a shutdown signal to the fan 13 to stop the fan, sends a valve closing signal to the valve motor 14, the valve motor 14 drives the reduction gearbox 15 to control the action of the valve connecting rod 16, and the first valve 11 and the second valve 12 are respectively closed through the first bevel gear 17 and the second bevel gear 18.

[0055] To further precisely control each valve, in an optional embodiment, the pressure regulating structure further includes a first valve driving device and a second valve driving device disposed outside the air duct pipe, wherein the first valve driving device includes a first valve motor for driving the first valve; the second valve driving device includes a second valve motor for driving the second valve.

[0056] In this embodiment, by providing two sets of actuating devices to drive the first valve and the second valve respectively, each set of actuating devices includes a valve motor, and the valve motors control the opening and closing of the corresponding valves respectively in response to the control signals of the controller, so as to achieve independent control of each valve. For example, the first valve motor drives the connected reduction gearbox in response to the control signal to control the opening and closing of the first valve through bevel gears, and the second valve motor drives the connected reduction gearbox in response to the control signal to control the opening and closing of the second valve through bevel gears.

[0057] Considering that the moisture condensed and accumulated in the auxiliary airbag cannot be automatically discharged, in an optional embodiment, as Figure 2 shown, the first valve 11, the air duct pipe 10 and the fan 13 form a first cavity, that is, Figure 2 the lower chamber in Figure 2 The aerostat further includes a first drying chamber 21 provided on the pipe wall of the air duct pipe 10 in the first cavity. The first drying chamber 21 includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; correspondingly, the second valve 12, the air duct pipe 10 and the fan 13 form a second cavity, that is,

[0058] Due to the temperature difference between the air in the auxiliary airbag and the ambient air, during the inflation and deflation processes of the auxiliary airbag, the moisture in the air condenses inside the airbag and is not easily discharged. Long-term accumulation will affect the safe operation of the auxiliary airbag. This implementation is based on an integrated structure of a fan, a first valve, and a second valve on the air duct pipe. By setting two symmetric drying chambers on the pipe walls of the upper and lower chambers of the air duct pipe, the absorption and discharge of moisture in the air of the auxiliary airbag are achieved by controlling the fan, the first valve, the second valve, the first drying valve cover, and the second drying valve cover, thereby realizing the automatic dehumidification and moisture discharge of the gas inside the airbag. Specifically, on the basis of closing the first valve and the second valve, the air inside the airbag is automatically dehumidified by controlling the fan, the first drying valve cover, and the second drying valve cover; or the desiccant in each drying chamber is dried and moisture-discharged by controlling the fan, the first drying valve cover, the second drying valve cover, the first valve, and the second valve.

[0059] In a specific example, multiple working modes of the auxiliary airbag are described separately. The auxiliary airbag includes a static working mode, an inflation mode, a deflation mode, a dehumidification mode, and a desiccant dehumidification mode.

[0060] As Figure 3 shown is the static working mode of the auxiliary airbag. In this mode, the airbag pressure of the auxiliary airbag sensed by the differential pressure sensor of the pressure control structure satisfies the normal working range, and there is no need for inflation or deflation. The first opening of the auxiliary airbag is closed to the outside. Specifically, the fan 13 stops rotating, the first valve and the second valve 12 are driven by the valve motor 14 through the reduction gearbox 15 to drive the valve connecting rod 16 to be closed through the corresponding bevel gears, and the drying valve covers of the first drying chamber 21 and the second drying chamber 22 are driven by the drying push rod 23 to be closed through the drying connecting rod 24.

[0061] As Figure 4 shown is the inflation mode of the auxiliary airbag. In this mode, when the airbag pressure of the auxiliary airbag sensed by the differential pressure sensor of the pressure control structure is less than the low-pressure minimum threshold for the safe operation of the preset auxiliary airbag, inflation is required. Specifically, the fan 13 rotates forward, the valve motor 14 drives the reduction gearbox 15 to control the movement of the valve connecting rod 16, and the first valve and the second valve 12 are opened respectively through the first bevel gear and the second bevel gear. Ambient air is filled into the auxiliary airbag through the first valve, the fan 13, and the second valve 12. The drying valve covers of the first drying chamber 21 and the second drying chamber 22 are driven by the drying push rod 23 to be closed through the drying connecting rod 24.

[0062] In the exhaust mode of the airbag, when the air pressure in the airbag sensed by the differential pressure sensor of the pressure control structure is greater than the maximum high-pressure threshold preset for the safe operation of the airbag, exhaust is required. Specifically, the fan rotates in reverse, and the valve motor drives the reduction gearbox to control the movement of the valve connecting rod. The first valve and the second valve are opened respectively through the first bevel gear and the second bevel gear. The air in the airbag is discharged through the second valve, the fan, and the first valve. The drying valve covers of the first drying chamber and the second drying chamber are driven to close by the drying connecting rod under the drive of the drying push rod.

[0063] As Figure 5 Shown is the dehumidification mode of the airbag. In this mode, the air pressure in the airbag sensed by the differential pressure sensor of the pressure control structure meets the normal working range, and no inflation or exhaust is required. Specifically, the first valve and the second valve 12 are driven to close by the valve motor 14 through the reduction gearbox 15 to drive the valve connecting rod 16 through the corresponding bevel gears. The fan 13 rotates forward or in reverse. The drying valve covers of the first drying chamber 21 and the second drying chamber 22 are driven to open by the drying connecting rod 24 under the drive of the drying push rod 23. For example, when the fan rotates in reverse, the air in the airbag enters from the first drying chamber 21, is dried by the first desiccant in the first drying chamber 21, passes through the fan to the second drying chamber 22, and is dried by the second desiccant in the second drying chamber 22 and then discharged. In this way, the air in the airbag circulates through the first desiccant and the second desiccant to remove the moisture in the air. When the fan rotates forward, the air in the airbag enters from the second drying chamber and is discharged from the first drying chamber to remove the moisture in the air in the airbag.

[0064] In the desiccant dehumidification mode of the airbag, in this mode, the air pressure in the airbag sensed by the differential pressure sensor of the pressure control structure meets the normal working range, and no inflation or exhaust is required. Specifically, when the first valve and the second valve are driven by a set of linkage action devices, the first valve and the second valve are driven to close by the valve motor through the reduction gearbox to drive the valve connecting rod through the corresponding bevel gears. The fan stops rotating. The drying valve covers of the first drying chamber and the second drying chamber are driven to close by the drying connecting rod under the drive of the drying push rod. The heating film in each drying chamber heats the desiccant so that the moisture absorbed by the desiccant evaporates into water vapor and slowly leaks to the external environment through the first valve. When the first valve and the second valve are driven by independent action devices respectively, the first valve is controlled to open, and the water vapor is directly discharged to the external environment, thereby realizing the removal of the moisture in the desiccant.

[0065] In an alternative embodiment, the airbag includes a plurality of sub-airbags; the pressure control structure includes sub-control structures corresponding to each sub-airbag, and each sub-control structure is disposed at the bottom of the corresponding sub-airbag.

[0066] In this embodiment, the pressure control structures of the multiple sub-airbags of the auxiliary airbag are respectively arranged, for example, at the bottom of each sub-airbag. Among them, the differential pressure sensor measures the pressure difference between the internal air pressure of the corresponding sub-airbag's bladder and the ambient air pressure, so that the controller can control the pressure regulating structure according to the bladder air pressure, for example, controlling the fan, the first valve, and the second valve to inflate or deflate the auxiliary airbag.

[0067] In another alternative embodiment, the auxiliary airbag includes multiple sub-airbags; the pressure control structure includes sub-control structures corresponding to each sub-airbag respectively, and the aerostat includes a console, and each sub-control structure is arranged in the console.

[0068] In this embodiment, the pressure control structures of the multiple sub-airbags of the auxiliary airbag are centrally arranged, for example, in the console at the bottom of the aerostat, which is convenient for installation and maintenance. Among them, each differential pressure sensor measures the pressure difference between the internal air pressure of the corresponding sub-airbag's bladder and the ambient air pressure, so that the corresponding controller can control the pressure regulating structure according to the bladder air pressure, for example, controlling the fan, the first valve, and the second valve to inflate or deflate the auxiliary airbag.

[0069] Based on the aerostat of the above embodiment, as Figure 6 shown, the present application also provides a wind power generation system, including the aerostat of the above embodiment and a wind turbine mounted on the aerostat.

[0070] In the wind power generation system of this embodiment, the first valve, the second valve, and the fan of the pressure regulating structure of the auxiliary airbag of the aerostat are integrally arranged in the air duct, and the air duct is arranged inside the auxiliary airbag. The pressure regulating structure acts in response to the control of the controller of the pressure control structure arranged outside the auxiliary airbag to realize the exhaust or inflation of the auxiliary airbag. In this embodiment, the pressure regulating structure is integrally arranged inside the auxiliary airbag, which has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability, and good protection, significantly improving the stability and reliability of the wind power generation system arranged at high altitude.

[0071] Based on the wind power generation system of the above embodiment, the present application also provides a pressure control method applied to the wind power generation system. The wind power generation system includes an aerostat and a wind turbine mounted on the aerostat, where the aerostat includes an auxiliary airbag, a pressure regulating structure arranged inside the auxiliary airbag, and a pressure control structure arranged outside the auxiliary airbag. The pressure regulating structure includes an air duct, a first valve arranged at one end of the air duct, a second valve arranged at the other end of the air duct, and a fan arranged in the air duct between the first valve and the second valve; the pressure control structure includes a controller and a differential pressure sensor. The pressure control method includes:

[0072] The controller of the pressure control structure controls the fan, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the differential pressure sensor.

[0073] In this embodiment, the pressure regulation structure of the auxiliary airbag of the aerostat in the wind power generation system is integrally arranged, that is, the first valve, the second valve, and the fan of the pressure regulation structure are integrally arranged in the air duct, and the air duct is arranged inside the auxiliary airbag. According to the controller of the pressure control structure arranged outside the auxiliary airbag, the first valve, the second valve, and the fan are controlled to act, so as to realize the exhaust or inflation of the auxiliary airbag. In this embodiment, the pressure regulation structure is integrally arranged inside the auxiliary airbag, which has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability, and good protection, significantly improving the stability and reliability of the wind power generation system arranged at high altitude.

[0074] In a specific embodiment, the controller of the pressure control structure controlling the fan, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the differential pressure sensor further includes:

[0075] When the air pressure of the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open, and controls the fan to rotate reversely to discharge the gas in the auxiliary airbag until the air pressure of the airbag is less than or equal to a second threshold;

[0076] When the air pressure of the airbag is less than a preset third threshold, the controller controls the first valve and the second valve to open, and controls the fan to rotate forward to fill the auxiliary airbag with ambient air until the air pressure of the airbag is greater than or equal to a fourth threshold.

[0077] In this embodiment, different air pressure thresholds are respectively set according to the design requirements of each auxiliary airbag, such as the maximum high-pressure threshold and the minimum high-pressure threshold, as well as the maximum low-pressure threshold and the minimum low-pressure threshold. Specifically, the controller obtains the air pressure of the airbag sensed by the differential pressure sensor in real time, and compares the air pressure of the airbag with the maximum high-pressure threshold and the minimum low-pressure threshold respectively, so as to realize the inflation and exhaust of the auxiliary airbag.

[0078] Specifically, when the air pressure of the airbag is greater than the maximum high-pressure threshold, it indicates that the auxiliary airbag needs to exhaust air outward to reduce the air pressure in the airbag. At this time, the controller controls the fan to rotate reversely, opens the first valve and the second valve to export the gas in the auxiliary airbag for exhaust, and simultaneously detects the air pressure of the airbag in real time. When the air pressure of the airbag is less than or equal to the minimum high-pressure threshold, the exhaust stops, and at the same time, the fan, the first valve, and the second valve are closed.

[0079] Similarly, when the air pressure in the bladder is less than the minimum low-pressure threshold, it indicates that the corresponding auxiliary airbag needs to be inflated to increase the air pressure in the bladder. At this time, the controller controls the fan to rotate forward, opens the first valve and the second valve to inflate the auxiliary airbag, and simultaneously detects the air pressure in the bladder in real time. When the air pressure in the bladder is greater than or equal to the maximum low-pressure threshold, inflation stops. First, the first valve and the second valve are closed, and then the fan is turned off.

[0080] In this embodiment, by presetting the air pressure thresholds of different airbags, the controller compares the air pressure in the bladder sensed by the differential pressure sensor with the air pressure thresholds, and realizes the inflation or deflation of the airbag through the fan, the first valve, and the second valve integrated in the air duct inside the auxiliary airbag for different situations. In this embodiment, the pressure regulating structure is integrally arranged inside the auxiliary airbag, which has the characteristics of compact structure, high pressure, good air tightness, convenient installation, good maintainability, and good protection, significantly improving the stability and reliability of the wind power generation system set at high altitude.

[0081] In an optional embodiment, the first valve, the air duct, and the fan form a first cavity. The aerostat further includes a first drying chamber provided on the pipe wall of the air duct in the first cavity. The first drying chamber includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; the second valve, the air duct, and the fan form a second cavity. The aerostat further includes a second drying chamber provided on the pipe wall of the air duct in the second cavity. The second drying chamber includes a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the aerostat further includes a drying push rod provided outside the air duct and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover. The drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod. The control method further includes:

[0082] In the static working mode, the controller controls the first valve and the second valve to close, controls the fan to turn off, and controls the first drying valve cover and the second drying valve cover to close;

[0083] In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to rotate in reverse, and controls the first drying valve cover and the second drying valve cover to open, so that the gas in the auxiliary airbag sequentially passes through the first desiccant in the first drying chamber and the second desiccant in the second drying chamber to dehumidify the gas in the auxiliary airbag;

[0084] In the desiccant dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to turn off, controls the first drying valve cover and the second drying valve cover to close, controls the first heating film to heat the first desiccant, and controls the second heating film to heat the second desiccant, so that the moisture of the first desiccant and the second desiccant evaporates.

[0085] Considering that there is a temperature difference between the air in the auxiliary airbag and the ambient air, during the inflation and deflation processes of the auxiliary airbag, the moisture in the air condenses inside the airbag and is not easily discharged. The long-term accumulation will affect the safe operation of the auxiliary airbag. This embodiment is based on an integrated structure of a fan, a first valve, and a second valve on the air duct. By setting two symmetrical drying chambers on the pipe walls of the upper and lower chambers of the air duct, the absorption and discharge of the moisture in the air of the auxiliary airbag are realized by controlling the fan, the first valve, the second valve, the first drying valve cover, and the second drying valve cover, so as to realize the automatic dehumidification and moisture discharge of the gas in the airbag. Specifically, on the basis of closing the first valve and the second valve, the air in the airbag is automatically dehumidified by controlling the fan, the first drying valve cover, and the second drying valve cover; or the desiccants in each drying chamber are dried and the moisture is discharged by controlling the fan, the first drying valve cover, the second drying valve cover, the first valve, and the second valve. For the specific implementation manners of this embodiment, refer to the foregoing embodiments and will not be elaborated herein.

[0086] In view of the existing problems at present, the present invention provides an aerostat, a wind power generation system, and a control method with an internal pressure regulating structure. By integrally arranging the first valve, the second valve, and the fan of the pressure regulating structure of the aerostat in the air duct, and arranging the air duct inside the auxiliary airbag, the pressure regulating structure responds to the control of the controller of the pressure control structure arranged outside the auxiliary airbag to perform actions, so as to realize the exhaust or inflation of the auxiliary airbag. This embodiment integrally arranges the pressure regulating structure inside the auxiliary airbag, which has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability, and good protection, thus making up for the problems existing in the prior art, significantly improving the stability and reliability of the wind power generation system arranged at high altitude, and having practical application value.

[0087] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. An aerostat based on a built-in pressure regulating structure, characterized in that: It includes an auxiliary airbag, a pressure regulating structure arranged inside the auxiliary airbag, and a pressure control structure arranged outside the auxiliary airbag, wherein: The pressure regulating structure comprises an air duct, a first valve arranged at one end of the air duct, a second valve arranged at the other end of the air duct, and a fan arranged in the air duct between the first valve and the second valve; The pressure control structure includes a controller and a pressure difference sensor. The controller is used to control the fan, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor.

2. The aerostat according to claim 1, characterized in that: The pressure regulating structure also includes a valve motor, a reduction gear box, a valve connecting rod, a first bevel gear and a second bevel gear arranged outside the air duct. The valve connecting rod comprises a first end and a second end, the first end of the valve connecting rod drives the first valve through the first bevel gear, and the second end of the valve connecting rod drives the second valve through the second bevel gear; The valve motor drives the valve connecting rod through the reduction box.

3. The aerostat according to claim 1, characterized in that: The pressure regulating structure further comprises a first valve driving device and a second valve driving device arranged outside the air duct, wherein The first valve driving device includes a first valve motor driving the first valve; The second valve driving device includes a second valve motor for driving the second valve.

4. The aerostat according to any one of claims 1 to 3, characterized in that: The first valve, the air duct and the fan form a first cavity, the aerostat further comprises a first drying chamber arranged on the tube wall of the air duct of the first cavity, the first drying chamber comprises a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; The second valve, the air duct and the fan form a second cavity, the aerostat further comprises a second drying chamber arranged on the tube wall of the air duct of the second cavity, the second drying chamber comprises a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; The aerostat further includes a drying push rod disposed outside the air duct, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, wherein the drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod.

5. The aerostat according to claim 1, characterized in that: The auxiliary airbag includes a plurality of sub-airbags; The pressure control structure includes sub-control structures corresponding to each sub-airbag, and each sub-control structure is arranged at the bottom of the corresponding sub-airbag; or The pressure control structure includes sub-control structures corresponding to each sub-airbag respectively, and the aerostat includes a control console, and each sub-control structure is arranged in the control console.

6. The aerostat according to claim 1, characterized in that: The auxiliary airbag comprises a first opening, the first opening is provided with a first flange, and the first flange comprises a first mounting portion; The air duct further includes a second flange disposed on a side close to the first valve, and the second flange includes a second mounting portion for fixing to the first mounting portion.

7. A wind power generation system, characterized in that: The invention comprises an aerostat according to any one of claims 1 to 6, and a wind turbine generator mounted on the aerostat.

8. A control method applied to the wind power generation system as claimed in claim 7, characterized in that: include: The controller of the pressure control structure controls the fan, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor.

9. The control method according to claim 8, characterized in that: The controller of the pressure control structure controls the fan, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, and further comprises: If the air pressure of the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open and controls the blower to reverse to discharge the gas in the auxiliary airbag until the air pressure of the airbag is less than or equal to a second threshold; If the air pressure in the bag is less than a preset third threshold, the controller controls the first valve and the second valve to open and controls the fan to rotate forward to fill the auxiliary air bag with ambient air until the air pressure in the bag is greater than or equal to a fourth threshold.

10. The control method according to claim 8, characterized in that: The first valve, the air duct pipe and the fan form a first cavity, the airship also includes a first drying chamber arranged on the tube wall of the air duct pipe of the first cavity, the first drying chamber includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; the second valve, the air duct pipe and the fan form a second cavity, the airship also includes a second drying chamber arranged on the tube wall of the air duct pipe of the second cavity, the second drying chamber includes a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the airship also includes a drying push rod arranged outside the air duct pipe, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, the drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod, and the control method also includes: In the static working mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, and controls the first drying valve cover and the second drying valve cover to be closed; In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to reverse, and controls the first drying valve cover and the second drying valve cover to open, so that the gas of the auxiliary airbag passes through the first desiccant in the first drying chamber and the second desiccant in the second drying chamber in sequence to perform a dehumidification operation on the gas of the auxiliary airbag; In the desiccant dehumidification mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, controls the first drying valve cover and the second drying valve cover to be closed, controls the first heating film to heat the first desiccant, and controls the second heating film to heat the second desiccant, so that the moisture in the first desiccant and the second desiccant evaporates.

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