Inflatable air film structure based on pneumatic power rotation

Abstract

An inflatable air film structure based on pneumatic power rotation uses tangential reaction moment from air injection to drive an inflatable rotating air film member and a rotating component fixed to the inflatable rotating air film member to rotate continuously. This simplifies the overall structure, reduces weight, cost and energy consumption, eliminates potential electrical safety hazards, and broadens application scenarios. A rotating assembly not only supports rotating motion but also fluidly connects a main structure body and an internal chamber of the inflatable rotating air film member, maintains system air tightness, ensures stable inflation and effective airflow power transmission. The specific deflection angle setting of the exhaust direction of air mold air holes ensures effective rotational driving torque, and the consistency of the directions ensures rotation smoothness.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of inflatable air film, and in particular to an inflatable air film structure based on pneumatic power rotation.BACKGROUND

[0002] Inflatable air film structure has been widely used in temporary buildings, advertising displays, landscape decoration, amusement facilities and other fields due to its lightweight, rapid inflation and deflation, deployment / storage, convenient transportation and strong visual impact. With the improvement of market demand, static inflatable modeling has been difficult to meet the increasing demand for dynamic and interesting display. To impart a dynamic effect to the inflatable structure, it is commonly used in the related art to mount independent electric rotating devices, including motor-driven rotating platforms or transmission mechanisms, externally or internally to the inflatable structure. These electric devices drive additional inflatable rotating air film components (which may be rigid or another set of inflated gas) to rotate around the inflatable main body to achieve more eye-catching dynamic display objectives. This way of using external power sources to realize rotation is the mainstream technical solution to realize the dynamic inflatable structure in the industry at present.

[0003] However, the above-described solution of relying on an external electric device to achieve rotation has a number of significant drawbacks. First of all, the motor and its accompanying power supply and transmission mechanism significantly increase the complexity and manufacturing cost of the entire system, while introducing additional weight, which is not conducive to the lightweight and portability of the structure. Further, motors require power supply and usually rely on external power cords or built-in batteries, which not only increases the difficulty of deployment (especially in outdoor environments without power), limits the flexibility of application scenarios, but also brings potential electrical safety hazards, including the risk of leakage in humid environments, and continuous power consumption also increases operating costs. Furthermore, to realize the rotating function, it is necessary to set a connection point between the rotating component (including the inflatable rotating air film member) and the main body inflatable structure, and at this connection point, it is necessary to ensure the smooth rotating movement and maintain the air tightness inside the inflatable structure to prevent the loss of air pressure, which puts forward extremely high requirements on the structural design and manufacturing process, which is difficult to realize and costly, and the air tightness is easy to fail after long-term use. Finally, the exposed motor, wires, transmission components not only affect the simplicity and harmony of the overall aesthetic appearance of the inflatable structure, but also may have potential safety hazards of mechanical movement (including pinch risk) and increase the complexity of maintenance.

[0004] Therefore, the key problem to be solved urgently in this field is: how to design a new type of inflatable air film structure, which can abandon the complex, cumbersome and many drawbacks external electric drive system, and instead use the airflow energy of the inflatable structure itself to efficiently and reliably drive the inflatable rotating air film members to achieve rotational motion, at the same time ensure the air tightness of the rotating connection parts, and finally achieve the comprehensive objectives of simplifying the structure, reducing the cost, improving the safety, broadening the application scenarios and improving the visual effect.SUMMARY

[0005] An objective of the present disclosure is to provide an inflatable air film structure based on pneumatic power rotation to solve the problems existing in the related art described above.

[0006] In order to achieve the above objective, the present disclosure adopts the following technical solutions.

[0007] The present disclosure provides an inflatable air film structure based on pneumatic power rotation, including:

[0008] an inflatable main structure body, the inflatable main structure body being enclosed by a flexible and airtight first fabric, a first accommodating cavity being formed inside the inflatable main structure body, and an air intake structure for communicating with an external blower being arranged on a wall surface of the inflatable main structure body;

[0009] an inflatable rotating air film member, the inflatable rotating air film member being enclosed by a flexible and airtight second fabric, a second accommodating cavity being formed inside the inflatable rotating air film member, and a wall surface of the inflatable rotating air film member being disposed with at least one air mold air hole as a source of exhaust thrust; an exhaust direction of the air mold air hole being set to have a deflection angle with a radial plane passing through a central rotation axis, and ensuring that airflow discharged from the air mold air valve can generate an effective rotational driving torque; and a plurality of air mold air holes being disposed on the inflatable rotating air film member, and the exhaust direction of all the air mold air holes being uniform; and

[0010] a rotating assembly, the rotating assembly being mechanically connected between the inflatable main structure body and the inflatable rotating air film member and fluidly communicating the first accommodating cavity and the second accommodating cavity, the rotating assembly being used to support the inflatable rotating air film member to rotate relative to the inflatable main structure body, and the rotating assembly including:

[0011] a fixing component, the fixing component being fixedly mounted to a wall surface of the inflatable main structure body and configuring a first airflow passage through which an airflow is drawn out from the first accommodating cavity;

[0012] a rotating component, the rotating component being fixedly mounted to a wall surface of the inflatable rotating air film member and configuring a second airflow passage for introducing airflow into the second accommodating cavity; and

[0013] a rotary connection mechanism, the rotary connection mechanism being used for enabling the rotating component to rotate around a preset central rotating axis relative to the fixing component; and

[0014] pressurized airflow supplied by the blower entering the first accommodating cavity through the air inlet structure, part of the pressurized airflow sequentially flowing through the first airflow passage and the second airflow passage to enter the second accommodating cavity to inflate and form the inflatable rotating air film member, and finally the part of the airflow being ejected from the air mold air holes at high speed; and the tangential reaction torque generated when the airflow is ejected being utilized to drive the inflatable rotating air film member and the rotating component fixed to the inflatable rotating air film member to continuously rotate around the central rotating axis.

[0015] Preferably, the fixing component is a first inner shell of a hollow structure, and the rotating component is a first outer shell of a hollow structure; the first inner shell and the first outer shell are coaxially nested with each other, and axes of the two coincide with the central rotational axis.

[0016] Preferably, the rotary connection mechanism is a first shaft, the first shaft is arranged along the central rotation axis, one end of the first shaft is connected to a central portion of the first inner shell, and the other end of the first shaft is connected to a central portion of the first outer shell, constraining the first inner shell and the first outer shell coaxially together, and allowing the first outer shell to freely rotate around the first inner shell.

[0017] Preferably, the first shaft is detachably and axially fixedly connected to the first inner shell and the first outer shell through screws.

[0018] Preferably, a first mounting hole is disposed on a wall surface of the inflatable main structure body at a position corresponding to the first inner shell; and an annular first mounting structure is arranged on an outer peripheral wall of the first inner shell, and an edge region of the first mounting hole is tightly fixed to the first mounting structure, forming an airtight connection between the first inner shell and the inflatable main structure body.

[0019] Preferably, the first mounting structure is an annular first fastening groove; and the inflatable main structure body is sleeved in the first fastening groove at the edge region of the first mounting hole, and is surrounded by a fastening member and fixed in the first fastening groove by applying radial pressure.

[0020] Preferably, a second mounting hole is disposed on the wall surface of the inflatable rotating air film member at a position corresponding to the first outer shell; and an outer peripheral wall of the first outer shell is arranged with an annular second mounting structure, and an edge region of the second mounting hole is tightly fixed to the second mounting structure, forming an airtight connection between the first outer shell and the inflatable rotating air film member.

[0021] Preferably, the second mounting structure is an annular second fastening groove; and the inflatable rotating air film member is sleeved in the second fastening groove at the edge region of the second mounting hole, and is surrounded by the fastening member and fixed in the second fastening groove by applying radial pressure.

[0022] Preferably, the fixing component is a second inner shell of a hollow structure, and the rotating component is a second outer shell of a hollow structure; the second inner shell and the second outer shell are coaxially nested with each other, and axes of the two coincide with the central rotational axis; and the rotary connection mechanism is a second shaft, the second shaft is arranged along the central rotational axis, one end of the second shaft is connected to a central portion of the second inner shell, and the other end of the second shaft is connected to a central portion of the second outer shell, constraining the second inner shell and the second outer shell together coaxially, and allowing the second outer shell to freely rotate around the second inner shell.

[0023] Preferably, the fixing component is a third inner shell of a hollow structure, the rotating component is a third outer shell of a hollow structure, and an outer side of the third outer shell is arranged with a protective shell; the third inner shell, the third outer shell and the protective shell are coaxially nested with each other, and axes of the three coincide with the central rotational axis; and the rotary connection mechanism is a third shaft, the third axis is arranged along the central rotational axis, one end of the third shaft is connected to a central portion of the third inner shell, and the other end of the third shaft is connected to a central portion of the third outer shell, constraining the third inner shell and the third outer shell together coaxially, and allowing the third outer shell to freely rotate around the third inner shell.

[0024] Compared with the related art, the present disclosure achieves the following beneficial technical effects.

[0025] According to the inflatable air film structure based on pneumatic power rotation provided by the present disclosure, the tangential reaction moment generated by air injection directly drives the inflatable rotating air film member and the rotating component fixed to the inflatable rotating air film member to rotate continuously, thereby completely omitting the external motor, power supply and transmission mechanism, obviously simplifying the overall structure, reducing the weight, cost and energy consumption, eliminating the potential electrical safety hazards and broadening the application scenarios. At the same time, the design of the rotating assembly not only supports the rotating motion, but more importantly, fluidly connects the main structure and the internal chamber of the inflatable rotating air film member at the rotating interface and maintains the overall air tightness of the system, ensuring the stable inflation state of the structure and effective airflow power transmission. In addition, the specific deflection angle setting of the exhaust direction of the air mold air holes ensures that an effective rotational driving torque can be generated, and the consistency of the directions of the plurality of air holes ensures the smoothness of rotation.BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To explain the technical solutions of examples in the present disclosure or in the related art more clearly, the accompanying drawings required in the description of the examples are introduced briefly below. Obviously, the drawings in the following description are only some examples of the present disclosure, and other drawings can be obtained according to these drawings without creative efforts for those ordinary skilled in the art.

[0027] FIG. 1 is a schematic structural diagram of an inflatable air film structure based on pneumatic power rotation provided by the present disclosure;

[0028] FIG. 2 is a cross-sectional view of an inflatable rotating air film member according to Example 1 of the present disclosure;

[0029] FIG. 3 is a schematic mounting diagram of a rotating assembly according to Example 1 of the present disclosure;

[0030] FIG. 4 is a schematic mounting diagram of the rotating assembly according to Example 2 of the present disclosure; and

[0031] FIG. 5 is a schematic mounting diagram of the rotating assembly according to Example 3 of the present disclosure.

[0032] Reference numerals and denotations thereof: 1—inflatable main structure body; 2—air mold air hole; 3—inflatable rotating air film member; 4—first outer shell; 5—first shaft; 6—first inner shell; 7—external blower; 8—screw; 9—second outer shell; 10—second inner shell; 11—second shaft; 12—fastening member; 13—first bolt; 14—protective shell; 15—second bolt; 16—third bolt; 17—third outer shell; 18—third shaft; 19—third inner shell; and 20—nut.DETAILED DESCRIPTION

[0033] The serial numbers assigned herein to components themselves, including “first”, “second”, etc., are used only to distinguish the objects described and do not have any sequential or technical meaning. The terms “connection” and “coupling” in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present disclosure, it is to be noted that the terms “upper,”“lower,”“front,”“back,”“left,”“right,”“vertical,”“horizontal,”“top,”“bottom,”“inner,”“outer,”“clockwise,”“counterclockwise,” and the like designate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present disclosure and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be understood as limiting the present disclosure.

[0034] In the present disclosure, unless expressly specified and limited otherwise, the first feature “above” or “below” the second feature may be the first and second features in direct contact, or an indirect connection between the first and second features through an intermediate medium. Furthermore, the first feature being “above”, “above” and “above” the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is smaller than that of the second feature.

[0035] Technical solutions in the examples of the present disclosure will be described clearly and completely in the following with reference to the accompanying drawings in the examples of the present disclosure. Obviously, all the described examples are only some, rather than all examples of the present disclosure. Based on the examples in the present disclosure, all other examples obtained by those ordinary skilled in the art without creative efforts belong to the protection scope of the present disclosure.

[0036] An objective of the present disclosure is to provide an inflatable air film structure based on pneumatic power rotation to solve the problems existing in the related art.

[0037] In order to make the above objectives, features and advantages of the present disclosure more obvious and understandable, the present disclosure is further explained in detail in combination with the accompanying drawings and specific embodiments.Example 1

[0038] An example of the present disclosure provides an inflatable air film structure based on pneumatic power rotation. Referring to FIG. 1, an inflatable main structure body is formed into a closed first accommodating cavity by a first flexible and airtight fabric (in this embodiment, 420D and 840D Oxford cloth laminated with polyvinyl chloride (PVC)) through high-frequency welding or sewing. The fabric combines high tear strength with excellent air tightness, and can withstand a sustained working internal pressure of 1.5 kPa without obvious creep. A top of the inflatable main structure body 1 is arranged with a circular air intake structure, and is connected to an external blower 7 through a hose with an inner diameter of 16 cm. The blower 7 continuously supplies pressurized air to a first accommodating cavity to maintain internal positive pressure.

[0039] In a center of the top of the inflatable main structure body 1, an inflatable rotating air film member 3 is mounted by a rotating assembly. In this example, the inflatable rotating air film member 3 has a four-blade wind fan shape, and is surrounded by a second flexible airtight fabric (Oxford cloth laminated with PVC) to form a second accommodating cavity. An air mold air hole 2 with a diameter of 8 mm is disposed at an end of each of the four fan blades, and the exhaust direction of all air holes is deflected by 30° in the same direction relative to a radial plane passing through a central rotation axis to produce a consistent and stable tangential reaction moment. When the blower 7 works, a part of pressurized airflow sequentially passes through an airflow passage inside the rotating assembly and enters the second accommodating cavity, and the inflatable rotating air film member 3 is rapidly formed. Subsequently, the air flow is ejected from the four air mold air holes 2 at a high speed, pushing the entire inflatable rotating air film member 3 to rotate continuously and smoothly around the central rotation axis. Since all the power comes from the airflow itself, no motor, battery or gear mechanism is needed, the weight of the system is significantly reduced and electrical safety hazards are completely eliminated.

[0040] FIGS. 2 and 3 illustrate in detail a first implementation of the rotating assembly. A fixing part adopts a hollow cylindrical first inner shell 6, which is made of high-strength engineering plastic (polycarbonate / acrylonitrile butadiene styrene (PC / ABS), alloy), with annular first fastening grooves disposed at a top and a bottom. The first inner shell 6 forms an airtight connection with an edge of a first mounting hole welded on the inflatable main structure body 1 by the annular first fastening grooves. Specifically, after the fabric at the edge of the first mounting hole is sleeved into the groove, it is surrounded by a plastic fastening member 12 (6 mm in width and 1 mm in thickness) with radial compression force applied, ensuring reliable air tightness is maintained during long-term repeated inflation and deflation.

[0041] A rotating component adopts a hollow cylindrical first outer shell 4 coaxially nested on an outer side of the first inner shell 6, and the two are rotationally connected by a first shaft 5. The first shaft 5 is an ABS plastic hollow tube, which is locked with central bosses of the first inner shell 6 and the first outer shell 4 through metric 5 (M5) screws 8. The hollow structure not only reduces the weight, but also reserves a channel for threading safety ropes or cables. A fitting clearance between the first inner shell 6 and the first outer shell 4 is controlled within 0.2 mm, the rotational friction resistance can be reduced to less than 0.3 N·m with food-grade silicone grease lubrication, and the inflatable rotating air film member 3 can start rotating under a pressure difference of 0.5 kPa.

[0042] A first airflow passage is formed inside the first inner shell 6, and a second airflow passage is formed inside the first outer shell 4. The two channels are abutted at the shaft to achieve fluid communication between the first accommodating cavity and the second accommodating cavity. Since radial sealing is achieved between the first inner shell 6 and the first outer shell 4 through multiple O-rings (nitrile butadiene rubber (NBR) with a Shore hardness of 70°), the overall air tightness can still be maintained at the rotating interface, ensuring that the internal pressures of the inflatable main structure body 1 and the inflatable rotating air film member 3 do not interfere with each other and remain independently stable.Example 2

[0043] FIG. 4 shows a second implementation of the rotating assembly, suitable for larger diameter or higher load application scenarios. A second inner shell 10 adopts a coaxial sleeve structure similarly to a second outer shell 9, but the rotary connection mechanism is changed to a second shaft 11, the second outer shell 9 is pressed into the second inner shell 10, end faces of the second inner shell 10 and the second outer shell 9 are locked, and the load-bearing capacity is improved by about 40% compared with that of Example 1. The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.Example 3

[0044] FIG. 5 shows a third implementation of the rotating assembly, the fixing component is a third inner shell (19) of a hollow structure, the rotating component is a third outer shell (17) of a hollow structure, and an outer side of the third outer shell (19) is arranged with a protective shell (14); the third inner shell (19), the third outer shell (17) and the protective shell (14) are coaxially nested with each other, axes of the three coincide with the central rotational axis, and are connected by connecting components including first bolts 13, second bolts 15, third bolts 16 and nuts 20; and the rotary connection mechanism is a third shaft (18), the third axis (18) is arranged along the central rotational axis, one end of the third shaft (18) is connected to a central portion of the third inner shell (19), and the other end of the third shaft (18) is connected to a central portion of the third outer shell (17), thereby constraining the third inner shell (19) and the third outer shell (17) together coaxially, and allowing the third outer shell (17) to freely rotate around the third inner shell (19). The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.

[0045] It is to be noted that in addition to the above-mentioned combination of “screws +fastening member”, the connection between the rotating assembly and the fabric can also adopt high-frequency welding, hot melt welding, PVC solvent bonding, thermoplastic polyurethane (TPU) tape cold bonding, buckle insertion, magnetic suction, riveting, knob locking, thread screwing, bolt positioning or a combination of multiple methods. For example, for lightweight small air molds made of TPU laminated Oxford cloth, high-frequency hot pressing can be directly used to weld the fabric and the annular flange of the rotating shell at one time, eliminating the need for metal fastening members and further reducing weight.

[0046] Although the above examples all adopt a circular rotating assembly, the rotating assembly and the inflatable rotating air film member may have any special shape including triangle, diamond, pentagon, hexagon, snowflake, star, and cartoon animal outline. As long as a closed accommodating cavity is formed inside the rotating assembly and tangential moment can be generated in the exhaust direction, pneumatically driven rotation can be realized.

[0047] In addition to the four-hole solution, single-hole, double-hole, three-hole or up to dozens of micro-hole arrays can also be arranged in the air mold air hole. The cross section of the air hole can be circular, oval, slit or special-shaped. By adjusting the combination of aperture and deflection angle, different rotational speed and torque requirements can be achieved.

[0048] Currently, in the instance, the rotating assembly is placed on the top of an inflatable castle, but the rotating assembly can also be placed on wings of an inflatable slide, an inflatable advertising arch column, a floating platform guardrail of an inflatable water park, or any visible part of an inflatable exhibit.

[0049] In addition to Oxford cloth laminated with PVC, the fabric of the inflatable main structure body and the inflatable rotating air film can be replaced with any one or more composite layers including Oxford cloth laminated with TPU, Oxford cloth laminated with polyurethane (PU), pure TPU, PU, PVC clamped mesh cloth, polyethylene vinyl acetate (PEVA), and ethylene vinyl acetate (EVA) laminated cloth. The shell and shaft of the rotating assembly can also be made of aluminum alloy, stainless steel, carbon fiber composite material, nylon glass fiber composite material, silica gel, and rubber to meet different strength, weight and weather resistance requirements.

[0050] In addition to engineering plastics, the material of rotating component can also adopt zinc alloy die-casting, aluminum alloy computer numerical control (CNC) processing, stainless steel precision casting, carbon fiber tube+aluminum alloy flange composite structure, or even fully silicone coated parts to take into account cost, strength and touch.

[0051] To improve the night display effect, a light-emitting diode (LED) light strip can be arranged inside the inflatable rotating air film member, and a waterproof cable can be penetrated through the hollow hole of the first shaft 5 or the second shaft 11. LED power supplies are available with built-in button batteries, wireless charging coils, or small hydro / wind modules, further reducing external wiring.

[0052] Taking Example 1 as an instance, the on-site assembly steps are as follows.

[0053] (1) The first inner shell 6 is aligned with the first mounting hole of the inflatable main structure body 1, and the edge of the fabric is embedded in the first fastening groove.

[0054] (2) A manual packing tool is used to tighten the plastic fastening member 12 to ensure that there is no visible gap between the first inner shell 6 and the fabric.

[0055] (3) The first outer shell 4 is pre-mounted to the second mounting hole of the inflatable rotating air film member 3, and is also fixed by the fastening member.

[0056] (4) Silicone grease is uniformly applied on the surface of the first shaft 5, one end of the first shaft 5 is inserted into a central hole of the first inner shell 6, the other end of the first shaft 5 is inserted into a central hole of the first shell 4, and the first shaft 5 is locked with the M5 screws 8.

[0057] (5) The blower 7 is connected and energized, and it is observed whether the inflatable rotating air film member 3 rises smoothly and starts to rotate; if jitter occurs, it can be corrected by finely adjusting the deflection angle of the air mold air hole 2 or increasing or decreasing the air volume of the blower 7.

[0058] (6) Routine maintenance only needs to replenish silicone grease lubrication once a quarter and check whether the fastening members are loose. There is no need for electrical maintenance, which greatly reduces the operating cost.

[0059] The technical features of the above examples may be arbitrarily combined, and for the sake of conciseness, all possible combinations of the technical features in the above examples are not described. However, as long as there is no contradiction between the combinations of these technical features, they shall be considered to be within the scope of this specification.

[0060] It is to be noted that the components mentioned in the above examples are all general standard components or components known to those skilled in the art, and the structures and principles thereof can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0061] The present disclosure has described the principles and embodiments of the present disclosure by applying specific instances, and the description of the above examples is only for helping to understand the method of the present disclosure and the core idea thereof. Meanwhile, for those skilled in the art, there will be changes in the specific embodiments and application scope according to the idea of the present disclosure. In summary, the contents of the present specification are not to be construed as limiting the present disclosure.

Examples

example 1

[0038]An example of the present disclosure provides an inflatable air film structure based on pneumatic power rotation. Referring to FIG. 1, an inflatable main structure body is formed into a closed first accommodating cavity by a first flexible and airtight fabric (in this embodiment, 420D and 840D Oxford cloth laminated with polyvinyl chloride (PVC)) through high-frequency welding or sewing. The fabric combines high tear strength with excellent air tightness, and can withstand a sustained working internal pressure of 1.5 kPa without obvious creep. A top of the inflatable main structure body 1 is arranged with a circular air intake structure, and is connected to an external blower 7 through a hose with an inner diameter of 16 cm. The blower 7 continuously supplies pressurized air to a first accommodating cavity to maintain internal positive pressure.

[0039]In a center of the top of the inflatable main structure body 1, an inflatable rotating air film member 3 is mounted by a rotatin...

example 2

[0043]FIG. 4 shows a second implementation of the rotating assembly, suitable for larger diameter or higher load application scenarios. A second inner shell 10 adopts a coaxial sleeve structure similarly to a second outer shell 9, but the rotary connection mechanism is changed to a second shaft 11, the second outer shell 9 is pressed into the second inner shell 10, end faces of the second inner shell 10 and the second outer shell 9 are locked, and the load-bearing capacity is improved by about 40% compared with that of Example 1. The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.

example 3

[0044]FIG. 5 shows a third implementation of the rotating assembly, the fixing component is a third inner shell (19) of a hollow structure, the rotating component is a third outer shell (17) of a hollow structure, and an outer side of the third outer shell (19) is arranged with a protective shell (14); the third inner shell (19), the third outer shell (17) and the protective shell (14) are coaxially nested with each other, axes of the three coincide with the central rotational axis, and are connected by connecting components including first bolts 13, second bolts 15, third bolts 16 and nuts 20; and the rotary connection mechanism is a third shaft (18), the third axis (18) is arranged along the central rotational axis, one end of the third shaft (18) is connected to a central portion of the third inner shell (19), and the other end of the third shaft (18) is connected to a central portion of the third outer shell (17), thereby constraining the third inner shell (19) and the third out...

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of inflatable air film, and in particular to an inflatable air film structure based on pneumatic power rotation.BACKGROUND

[0002] Inflatable air film structure has been widely used in temporary buildings, advertising displays, landscape decoration, amusement facilities and other fields due to its lightweight, rapid inflation and deflation, deployment / storage, convenient transportation and strong visual impact. With the improvement of market demand, static inflatable modeling has been difficult to meet the increasing demand for dynamic and interesting display. To impart a dynamic effect to the inflatable structure, it is commonly used in the related art to mount independent electric rotating devices, including motor-driven rotating platforms or transmission mechanisms, externally or internally to the inflatable structure. These electric devices drive additional inflatable rotating air film components (which may be rigid or another set of inflated gas) to rotate around the inflatable main body to achieve more eye-catching dynamic display objectives. This way of using external power sources to realize rotation is the mainstream technical solution to realize the dynamic inflatable structure in the industry at present.

[0003] However, the above-described solution of relying on an external electric device to achieve rotation has a number of significant drawbacks. First of all, the motor and its accompanying power supply and transmission mechanism significantly increase the complexity and manufacturing cost of the entire system, while introducing additional weight, which is not conducive to the lightweight and portability of the structure. Further, motors require power supply and usually rely on external power cords or built-in batteries, which not only increases the difficulty of deployment (especially in outdoor environments without power), limits the flexibility of application scenarios, but also brings potential electrical safety hazards, including the risk of leakage in humid environments, and continuous power consumption also increases operating costs. Furthermore, to realize the rotating function, it is necessary to set a connection point between the rotating component (including the inflatable rotating air film member) and the main body inflatable structure, and at this connection point, it is necessary to ensure the smooth rotating movement and maintain the air tightness inside the inflatable structure to prevent the loss of air pressure, which puts forward extremely high requirements on the structural design and manufacturing process, which is difficult to realize and costly, and the air tightness is easy to fail after long-term use. Finally, the exposed motor, wires, transmission components not only affect the simplicity and harmony of the overall aesthetic appearance of the inflatable structure, but also may have potential safety hazards of mechanical movement (including pinch risk) and increase the complexity of maintenance.

[0004] Therefore, the key problem to be solved urgently in this field is: how to design a new type of inflatable air film structure, which can abandon the complex, cumbersome and many drawbacks external electric drive system, and instead use the airflow energy of the inflatable structure itself to efficiently and reliably drive the inflatable rotating air film members to achieve rotational motion, at the same time ensure the air tightness of the rotating connection parts, and finally achieve the comprehensive objectives of simplifying the structure, reducing the cost, improving the safety, broadening the application scenarios and improving the visual effect.SUMMARY

[0005] An objective of the present disclosure is to provide an inflatable air film structure based on pneumatic power rotation to solve the problems existing in the related art described above.

[0006] In order to achieve the above objective, the present disclosure adopts the following technical solutions.

[0007] The present disclosure provides an inflatable air film structure based on pneumatic power rotation, including:

[0008] an inflatable main structure body, the inflatable main structure body being enclosed by a flexible and airtight first fabric, a first accommodating cavity being formed inside the inflatable main structure body, and an air intake structure for communicating with an external blower being arranged on a wall surface of the inflatable main structure body;

[0009] an inflatable rotating air film member, the inflatable rotating air film member being enclosed by a flexible and airtight second fabric, a second accommodating cavity being formed inside the inflatable rotating air film member, and a wall surface of the inflatable rotating air film member being disposed with at least one air mold air hole as a source of exhaust thrust; an exhaust direction of the air mold air hole being set to have a deflection angle with a radial plane passing through a central rotation axis, and ensuring that airflow discharged from the air mold air valve can generate an effective rotational driving torque; and a plurality of air mold air holes being disposed on the inflatable rotating air film member, and the exhaust direction of all the air mold air holes being uniform; and

[0010] a rotating assembly, the rotating assembly being mechanically connected between the inflatable main structure body and the inflatable rotating air film member and fluidly communicating the first accommodating cavity and the second accommodating cavity, the rotating assembly being used to support the inflatable rotating air film member to rotate relative to the inflatable main structure body, and the rotating assembly including:

[0011] a fixing component, the fixing component being fixedly mounted to a wall surface of the inflatable main structure body and configuring a first airflow passage through which an airflow is drawn out from the first accommodating cavity;

[0012] a rotating component, the rotating component being fixedly mounted to a wall surface of the inflatable rotating air film member and configuring a second airflow passage for introducing airflow into the second accommodating cavity; and

[0013] a rotary connection mechanism, the rotary connection mechanism being used for enabling the rotating component to rotate around a preset central rotating axis relative to the fixing component; and

[0014] pressurized airflow supplied by the blower entering the first accommodating cavity through the air inlet structure, part of the pressurized airflow sequentially flowing through the first airflow passage and the second airflow passage to enter the second accommodating cavity to inflate and form the inflatable rotating air film member, and finally the part of the airflow being ejected from the air mold air holes at high speed; and the tangential reaction torque generated when the airflow is ejected being utilized to drive the inflatable rotating air film member and the rotating component fixed to the inflatable rotating air film member to continuously rotate around the central rotating axis.

[0015] Preferably, the fixing component is a first inner shell of a hollow structure, and the rotating component is a first outer shell of a hollow structure; the first inner shell and the first outer shell are coaxially nested with each other, and axes of the two coincide with the central rotational axis.

[0016] Preferably, the rotary connection mechanism is a first shaft, the first shaft is arranged along the central rotation axis, one end of the first shaft is connected to a central portion of the first inner shell, and the other end of the first shaft is connected to a central portion of the first outer shell, constraining the first inner shell and the first outer shell coaxially together, and allowing the first outer shell to freely rotate around the first inner shell.

[0017] Preferably, the first shaft is detachably and axially fixedly connected to the first inner shell and the first outer shell through screws.

[0018] Preferably, a first mounting hole is disposed on a wall surface of the inflatable main structure body at a position corresponding to the first inner shell; and an annular first mounting structure is arranged on an outer peripheral wall of the first inner shell, and an edge region of the first mounting hole is tightly fixed to the first mounting structure, forming an airtight connection between the first inner shell and the inflatable main structure body.

[0019] Preferably, the first mounting structure is an annular first fastening groove; and the inflatable main structure body is sleeved in the first fastening groove at the edge region of the first mounting hole, and is surrounded by a fastening member and fixed in the first fastening groove by applying radial pressure.

[0020] Preferably, a second mounting hole is disposed on the wall surface of the inflatable rotating air film member at a position corresponding to the first outer shell; and an outer peripheral wall of the first outer shell is arranged with an annular second mounting structure, and an edge region of the second mounting hole is tightly fixed to the second mounting structure, forming an airtight connection between the first outer shell and the inflatable rotating air film member.

[0021] Preferably, the second mounting structure is an annular second fastening groove; and the inflatable rotating air film member is sleeved in the second fastening groove at the edge region of the second mounting hole, and is surrounded by the fastening member and fixed in the second fastening groove by applying radial pressure.

[0022] Preferably, the fixing component is a second inner shell of a hollow structure, and the rotating component is a second outer shell of a hollow structure; the second inner shell and the second outer shell are coaxially nested with each other, and axes of the two coincide with the central rotational axis; and the rotary connection mechanism is a second shaft, the second shaft is arranged along the central rotational axis, one end of the second shaft is connected to a central portion of the second inner shell, and the other end of the second shaft is connected to a central portion of the second outer shell, constraining the second inner shell and the second outer shell together coaxially, and allowing the second outer shell to freely rotate around the second inner shell.

[0023] Preferably, the fixing component is a third inner shell of a hollow structure, the rotating component is a third outer shell of a hollow structure, and an outer side of the third outer shell is arranged with a protective shell; the third inner shell, the third outer shell and the protective shell are coaxially nested with each other, and axes of the three coincide with the central rotational axis; and the rotary connection mechanism is a third shaft, the third axis is arranged along the central rotational axis, one end of the third shaft is connected to a central portion of the third inner shell, and the other end of the third shaft is connected to a central portion of the third outer shell, constraining the third inner shell and the third outer shell together coaxially, and allowing the third outer shell to freely rotate around the third inner shell.

[0024] Compared with the related art, the present disclosure achieves the following beneficial technical effects.

[0025] According to the inflatable air film structure based on pneumatic power rotation provided by the present disclosure, the tangential reaction moment generated by air injection directly drives the inflatable rotating air film member and the rotating component fixed to the inflatable rotating air film member to rotate continuously, thereby completely omitting the external motor, power supply and transmission mechanism, obviously simplifying the overall structure, reducing the weight, cost and energy consumption, eliminating the potential electrical safety hazards and broadening the application scenarios. At the same time, the design of the rotating assembly not only supports the rotating motion, but more importantly, fluidly connects the main structure and the internal chamber of the inflatable rotating air film member at the rotating interface and maintains the overall air tightness of the system, ensuring the stable inflation state of the structure and effective airflow power transmission. In addition, the specific deflection angle setting of the exhaust direction of the air mold air holes ensures that an effective rotational driving torque can be generated, and the consistency of the directions of the plurality of air holes ensures the smoothness of rotation.BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To explain the technical solutions of examples in the present disclosure or in the related art more clearly, the accompanying drawings required in the description of the examples are introduced briefly below. Obviously, the drawings in the following description are only some examples of the present disclosure, and other drawings can be obtained according to these drawings without creative efforts for those ordinary skilled in the art.

[0027] FIG. 1 is a schematic structural diagram of an inflatable air film structure based on pneumatic power rotation provided by the present disclosure;

[0028] FIG. 2 is a cross-sectional view of an inflatable rotating air film member according to Example 1 of the present disclosure;

[0029] FIG. 3 is a schematic mounting diagram of a rotating assembly according to Example 1 of the present disclosure;

[0030] FIG. 4 is a schematic mounting diagram of the rotating assembly according to Example 2 of the present disclosure; and

[0031] FIG. 5 is a schematic mounting diagram of the rotating assembly according to Example 3 of the present disclosure.

[0032] Reference numerals and denotations thereof: 1—inflatable main structure body; 2—air mold air hole; 3—inflatable rotating air film member; 4—first outer shell; 5—first shaft; 6—first inner shell; 7—external blower; 8—screw; 9—second outer shell; 10—second inner shell; 11—second shaft; 12—fastening member; 13—first bolt; 14—protective shell; 15—second bolt; 16—third bolt; 17—third outer shell; 18—third shaft; 19—third inner shell; and 20—nut.DETAILED DESCRIPTION

[0033] The serial numbers assigned herein to components themselves, including “first”, “second”, etc., are used only to distinguish the objects described and do not have any sequential or technical meaning. The terms “connection” and “coupling” in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present disclosure, it is to be noted that the terms “upper,”“lower,”“front,”“back,”“left,”“right,”“vertical,”“horizontal,”“top,”“bottom,”“inner,”“outer,”“clockwise,”“counterclockwise,” and the like designate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present disclosure and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be understood as limiting the present disclosure.

[0034] In the present disclosure, unless expressly specified and limited otherwise, the first feature “above” or “below” the second feature may be the first and second features in direct contact, or an indirect connection between the first and second features through an intermediate medium. Furthermore, the first feature being “above”, “above” and “above” the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is smaller than that of the second feature.

[0035] Technical solutions in the examples of the present disclosure will be described clearly and completely in the following with reference to the accompanying drawings in the examples of the present disclosure. Obviously, all the described examples are only some, rather than all examples of the present disclosure. Based on the examples in the present disclosure, all other examples obtained by those ordinary skilled in the art without creative efforts belong to the protection scope of the present disclosure.

[0036] An objective of the present disclosure is to provide an inflatable air film structure based on pneumatic power rotation to solve the problems existing in the related art.

[0037] In order to make the above objectives, features and advantages of the present disclosure more obvious and understandable, the present disclosure is further explained in detail in combination with the accompanying drawings and specific embodiments.Example 1

[0038] An example of the present disclosure provides an inflatable air film structure based on pneumatic power rotation. Referring to FIG. 1, an inflatable main structure body is formed into a closed first accommodating cavity by a first flexible and airtight fabric (in this embodiment, 420D and 840D Oxford cloth laminated with polyvinyl chloride (PVC)) through high-frequency welding or sewing. The fabric combines high tear strength with excellent air tightness, and can withstand a sustained working internal pressure of 1.5 kPa without obvious creep. A top of the inflatable main structure body 1 is arranged with a circular air intake structure, and is connected to an external blower 7 through a hose with an inner diameter of 16 cm. The blower 7 continuously supplies pressurized air to a first accommodating cavity to maintain internal positive pressure.

[0039] In a center of the top of the inflatable main structure body 1, an inflatable rotating air film member 3 is mounted by a rotating assembly. In this example, the inflatable rotating air film member 3 has a four-blade wind fan shape, and is surrounded by a second flexible airtight fabric (Oxford cloth laminated with PVC) to form a second accommodating cavity. An air mold air hole 2 with a diameter of 8 mm is disposed at an end of each of the four fan blades, and the exhaust direction of all air holes is deflected by 30° in the same direction relative to a radial plane passing through a central rotation axis to produce a consistent and stable tangential reaction moment. When the blower 7 works, a part of pressurized airflow sequentially passes through an airflow passage inside the rotating assembly and enters the second accommodating cavity, and the inflatable rotating air film member 3 is rapidly formed. Subsequently, the air flow is ejected from the four air mold air holes 2 at a high speed, pushing the entire inflatable rotating air film member 3 to rotate continuously and smoothly around the central rotation axis. Since all the power comes from the airflow itself, no motor, battery or gear mechanism is needed, the weight of the system is significantly reduced and electrical safety hazards are completely eliminated.

[0040] FIGS. 2 and 3 illustrate in detail a first implementation of the rotating assembly. A fixing part adopts a hollow cylindrical first inner shell 6, which is made of high-strength engineering plastic (polycarbonate / acrylonitrile butadiene styrene (PC / ABS), alloy), with annular first fastening grooves disposed at a top and a bottom. The first inner shell 6 forms an airtight connection with an edge of a first mounting hole welded on the inflatable main structure body 1 by the annular first fastening grooves. Specifically, after the fabric at the edge of the first mounting hole is sleeved into the groove, it is surrounded by a plastic fastening member 12 (6 mm in width and 1 mm in thickness) with radial compression force applied, ensuring reliable air tightness is maintained during long-term repeated inflation and deflation.

[0041] A rotating component adopts a hollow cylindrical first outer shell 4 coaxially nested on an outer side of the first inner shell 6, and the two are rotationally connected by a first shaft 5. The first shaft 5 is an ABS plastic hollow tube, which is locked with central bosses of the first inner shell 6 and the first outer shell 4 through metric 5 (M5) screws 8. The hollow structure not only reduces the weight, but also reserves a channel for threading safety ropes or cables. A fitting clearance between the first inner shell 6 and the first outer shell 4 is controlled within 0.2 mm, the rotational friction resistance can be reduced to less than 0.3 N·m with food-grade silicone grease lubrication, and the inflatable rotating air film member 3 can start rotating under a pressure difference of 0.5 kPa.

[0042] A first airflow passage is formed inside the first inner shell 6, and a second airflow passage is formed inside the first outer shell 4. The two channels are abutted at the shaft to achieve fluid communication between the first accommodating cavity and the second accommodating cavity. Since radial sealing is achieved between the first inner shell 6 and the first outer shell 4 through multiple O-rings (nitrile butadiene rubber (NBR) with a Shore hardness of 70°), the overall air tightness can still be maintained at the rotating interface, ensuring that the internal pressures of the inflatable main structure body 1 and the inflatable rotating air film member 3 do not interfere with each other and remain independently stable.Example 2

[0043] FIG. 4 shows a second implementation of the rotating assembly, suitable for larger diameter or higher load application scenarios. A second inner shell 10 adopts a coaxial sleeve structure similarly to a second outer shell 9, but the rotary connection mechanism is changed to a second shaft 11, the second outer shell 9 is pressed into the second inner shell 10, end faces of the second inner shell 10 and the second outer shell 9 are locked, and the load-bearing capacity is improved by about 40% compared with that of Example 1. The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.Example 3

[0044] FIG. 5 shows a third implementation of the rotating assembly, the fixing component is a third inner shell (19) of a hollow structure, the rotating component is a third outer shell (17) of a hollow structure, and an outer side of the third outer shell (19) is arranged with a protective shell (14); the third inner shell (19), the third outer shell (17) and the protective shell (14) are coaxially nested with each other, axes of the three coincide with the central rotational axis, and are connected by connecting components including first bolts 13, second bolts 15, third bolts 16 and nuts 20; and the rotary connection mechanism is a third shaft (18), the third axis (18) is arranged along the central rotational axis, one end of the third shaft (18) is connected to a central portion of the third inner shell (19), and the other end of the third shaft (18) is connected to a central portion of the third outer shell (17), thereby constraining the third inner shell (19) and the third outer shell (17) together coaxially, and allowing the third outer shell (17) to freely rotate around the third inner shell (19). The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.

[0045] It is to be noted that in addition to the above-mentioned combination of “screws +fastening member”, the connection between the rotating assembly and the fabric can also adopt high-frequency welding, hot melt welding, PVC solvent bonding, thermoplastic polyurethane (TPU) tape cold bonding, buckle insertion, magnetic suction, riveting, knob locking, thread screwing, bolt positioning or a combination of multiple methods. For example, for lightweight small air molds made of TPU laminated Oxford cloth, high-frequency hot pressing can be directly used to weld the fabric and the annular flange of the rotating shell at one time, eliminating the need for metal fastening members and further reducing weight.

[0046] Although the above examples all adopt a circular rotating assembly, the rotating assembly and the inflatable rotating air film member may have any special shape including triangle, diamond, pentagon, hexagon, snowflake, star, and cartoon animal outline. As long as a closed accommodating cavity is formed inside the rotating assembly and tangential moment can be generated in the exhaust direction, pneumatically driven rotation can be realized.

[0047] In addition to the four-hole solution, single-hole, double-hole, three-hole or up to dozens of micro-hole arrays can also be arranged in the air mold air hole. The cross section of the air hole can be circular, oval, slit or special-shaped. By adjusting the combination of aperture and deflection angle, different rotational speed and torque requirements can be achieved.

[0048] Currently, in the instance, the rotating assembly is placed on the top of an inflatable castle, but the rotating assembly can also be placed on wings of an inflatable slide, an inflatable advertising arch column, a floating platform guardrail of an inflatable water park, or any visible part of an inflatable exhibit.

[0049] In addition to Oxford cloth laminated with PVC, the fabric of the inflatable main structure body and the inflatable rotating air film can be replaced with any one or more composite layers including Oxford cloth laminated with TPU, Oxford cloth laminated with polyurethane (PU), pure TPU, PU, PVC clamped mesh cloth, polyethylene vinyl acetate (PEVA), and ethylene vinyl acetate (EVA) laminated cloth. The shell and shaft of the rotating assembly can also be made of aluminum alloy, stainless steel, carbon fiber composite material, nylon glass fiber composite material, silica gel, and rubber to meet different strength, weight and weather resistance requirements.

[0050] In addition to engineering plastics, the material of rotating component can also adopt zinc alloy die-casting, aluminum alloy computer numerical control (CNC) processing, stainless steel precision casting, carbon fiber tube+aluminum alloy flange composite structure, or even fully silicone coated parts to take into account cost, strength and touch.

[0051] To improve the night display effect, a light-emitting diode (LED) light strip can be arranged inside the inflatable rotating air film member, and a waterproof cable can be penetrated through the hollow hole of the first shaft 5 or the second shaft 11. LED power supplies are available with built-in button batteries, wireless charging coils, or small hydro / wind modules, further reducing external wiring.

[0052] Taking Example 1 as an instance, the on-site assembly steps are as follows.

[0053] (1) The first inner shell 6 is aligned with the first mounting hole of the inflatable main structure body 1, and the edge of the fabric is embedded in the first fastening groove.

[0054] (2) A manual packing tool is used to tighten the plastic fastening member 12 to ensure that there is no visible gap between the first inner shell 6 and the fabric.

[0055] (3) The first outer shell 4 is pre-mounted to the second mounting hole of the inflatable rotating air film member 3, and is also fixed by the fastening member.

[0056] (4) Silicone grease is uniformly applied on the surface of the first shaft 5, one end of the first shaft 5 is inserted into a central hole of the first inner shell 6, the other end of the first shaft 5 is inserted into a central hole of the first shell 4, and the first shaft 5 is locked with the M5 screws 8.

[0057] (5) The blower 7 is connected and energized, and it is observed whether the inflatable rotating air film member 3 rises smoothly and starts to rotate; if jitter occurs, it can be corrected by finely adjusting the deflection angle of the air mold air hole 2 or increasing or decreasing the air volume of the blower 7.

[0058] (6) Routine maintenance only needs to replenish silicone grease lubrication once a quarter and check whether the fastening members are loose. There is no need for electrical maintenance, which greatly reduces the operating cost.

[0059] The technical features of the above examples may be arbitrarily combined, and for the sake of conciseness, all possible combinations of the technical features in the above examples are not described. However, as long as there is no contradiction between the combinations of these technical features, they shall be considered to be within the scope of this specification.

[0060] It is to be noted that the components mentioned in the above examples are all general standard components or components known to those skilled in the art, and the structures and principles thereof can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0061] The present disclosure has described the principles and embodiments of the present disclosure by applying specific instances, and the description of the above examples is only for helping to understand the method of the present disclosure and the core idea thereof. Meanwhile, for those skilled in the art, there will be changes in the specific embodiments and application scope according to the idea of the present disclosure. In summary, the contents of the present specification are not to be construed as limiting the present disclosure.

Examples

example 1

[0038]An example of the present disclosure provides an inflatable air film structure based on pneumatic power rotation. Referring to FIG. 1, an inflatable main structure body is formed into a closed first accommodating cavity by a first flexible and airtight fabric (in this embodiment, 420D and 840D Oxford cloth laminated with polyvinyl chloride (PVC)) through high-frequency welding or sewing. The fabric combines high tear strength with excellent air tightness, and can withstand a sustained working internal pressure of 1.5 kPa without obvious creep. A top of the inflatable main structure body 1 is arranged with a circular air intake structure, and is connected to an external blower 7 through a hose with an inner diameter of 16 cm. The blower 7 continuously supplies pressurized air to a first accommodating cavity to maintain internal positive pressure.

[0039]In a center of the top of the inflatable main structure body 1, an inflatable rotating air film member 3 is mounted by a rotatin...

example 2

[0043]FIG. 4 shows a second implementation of the rotating assembly, suitable for larger diameter or higher load application scenarios. A second inner shell 10 adopts a coaxial sleeve structure similarly to a second outer shell 9, but the rotary connection mechanism is changed to a second shaft 11, the second outer shell 9 is pressed into the second inner shell 10, end faces of the second inner shell 10 and the second outer shell 9 are locked, and the load-bearing capacity is improved by about 40% compared with that of Example 1. The remaining assembly methods and sealing principles are similar to those of Example 1, and will not be described in detail.

example 3

[0044]FIG. 5 shows a third implementation of the rotating assembly, the fixing component is a third inner shell (19) of a hollow structure, the rotating component is a third outer shell (17) of a hollow structure, and an outer side of the third outer shell (19) is arranged with a protective shell (14); the third inner shell (19), the third outer shell (17) and the protective shell (14) are coaxially nested with each other, axes of the three coincide with the central rotational axis, and are connected by connecting components including first bolts 13, second bolts 15, third bolts 16 and nuts 20; and the rotary connection mechanism is a third shaft (18), the third axis (18) is arranged along the central rotational axis, one end of the third shaft (18) is connected to a central portion of the third inner shell (19), and the other end of the third shaft (18) is connected to a central portion of the third outer shell (17), thereby constraining the third inner shell (19) and the third out...

Claims

1. An inflatable air film structure based on pneumatic power rotation, comprising:an inflatable main structure body (1), the inflatable main structure body (1) being enclosed by a flexible and airtight first fabric, a first accommodating cavity being formed inside the inflatable main structure body (1), and an air intake structure for communicating with an external blower (7) being arranged on a wall surface of the inflatable main structure body (1);an inflatable rotating air film member (3), the inflatable rotating air film member (3) being enclosed by a flexible and airtight second fabric, a second accommodating cavity being formed inside the inflatable rotating air film member (3), and a wall surface of the inflatable rotating air film member (3) being disposed with at least one air mold air hole (2) as a source of exhaust thrust;an exhaust direction of the air mold air hole (2) being set to have a deflection angle with a radial plane passing through a central rotation axis, and ensuring that airflow discharged from the air mold air valve (2) can generate an effective rotational driving torque; and a plurality of air mold air holes (2) being disposed on the inflatable rotating air film member (3), and the exhaust direction of all the air mold air holes (2) being uniform; anda rotating assembly, the rotating assembly being mechanically connected between the inflatable main structure body (1) and the inflatable rotating air film member (3) and fluidly communicating the first accommodating cavity and the second accommodating cavity, the rotating assembly being used to support the inflatable rotating air film member (3) to rotate relative to the inflatable main structure body (1), and the rotating assembly comprising:a fixing component, the fixing component being fixedly mounted to a wall surface of the inflatable main structure body (1) and configuring a first airflow passage through which an airflow is drawn out from the first accommodating cavity;a rotating component, the rotating component being fixedly mounted to a wall surface of the inflatable rotating air film member (3) and configuring a second airflow passage for introducing airflow into the second accommodating cavity; anda rotary connection mechanism, the rotary connection mechanism being used for enabling the rotating component to rotate around a preset central rotating axis relative to the fixing component;pressurized airflow supplied by the blower (7) entering the first accommodating cavity through the air inlet structure, part of the pressurized airflow sequentially flowing through the first airflow passage and the second airflow passage to enter the second accommodating cavity to inflate and form the inflatable rotating air film member (3), and finally the part of the airflow being ejected from the air mold air holes (2) at high speed; and the tangential reaction torque generated when the airflow is ejected being utilized to drive the inflatable rotating air film member (3) and the rotating component fixed to the inflatable rotating air film member (3) to continuously rotate around the central rotating axis.

2. The inflatable air film structure based on pneumatic power rotation according to claim 1, wherein the fixing component is a first inner shell (6) of a hollow structure, and the rotating component is a first outer shell (4) of a hollow structure; the first inner shell (6) and the first outer shell (4) are coaxially nested with each other, and axes of the two coincide with the central rotational axis.

3. The inflatable air film structure based on pneumatic power rotation according to claim 2, wherein the rotary connection mechanism is a first shaft (5), the first shaft (5) is arranged along the central rotation axis, one end of the first shaft (5) is connected to a central portion of the first inner shell (6), and the other end of the first shaft (5) is connected to a central portion of the first outer shell (4), constraining the first inner shell (6) and the first outer shell (4) coaxially together, and allowing the first outer shell (4) to freely rotate around the first inner shell (6).

4. The inflatable air film structure based on pneumatic power rotation according to claim 3, wherein the first shaft (5) is detachably and axially fixedly connected to the first inner shell (6) and the first outer shell (4) through screws (8).

5. The inflatable air film structure based on pneumatic power rotation according to claim 2, wherein a first mounting hole is disposed on a wall surface of the inflatable main structure body (1) at a position corresponding to the first inner shell (6); and an annular first mounting structure is arranged on an outer peripheral wall of the first inner shell (6), and an edge region of the first mounting hole is tightly fixed to the first mounting structure, forming an airtight connection between the first inner shell (6) and the inflatable main structure body (1).

6. The inflatable air film structure based on pneumatic power rotation according to claim 5, wherein the first mounting structure is an annular first fastening groove; and the inflatable main structure body (1) is sleeved in the first fastening groove at the edge region of the first mounting hole, and is surrounded by a fastening member (12) and fixed in the first fastening groove by applying radial pressure.

7. The inflatable air film structure based on pneumatic power rotation according to claim 2, wherein a second mounting hole is disposed on the wall surface of the inflatable rotating air film member (3) at a position corresponding to the first outer shell (4); and an outer peripheral wall of the first outer shell (4) is arranged with an annular second mounting structure, and an edge region of the second mounting hole is tightly fixed to the second mounting structure, forming an airtight connection between the first outer shell (4) and the inflatable rotating air film member (3).

8. The inflatable air film structure based on pneumatic power rotation according to claim 7, wherein the second mounting structure is an annular second fastening groove; and the inflatable rotating air film member (3) is sleeved in the second fastening groove at the edge region of the second mounting hole, and is surrounded by the fastening member (12) and fixed in the second fastening groove by applying radial pressure.

9. The inflatable air film structure based on pneumatic power rotation according to claim 1, wherein the fixing component is a second inner shell (10) of a hollow structure, and the rotating component is a second outer shell (9) of a hollow structure; the second inner shell (10) and the second outer shell (9) are coaxially nested with each other, and axes of the two coincide with the central rotational axis; and the rotary connection mechanism is a second shaft (11), the second shaft (11) is arranged along the central rotational axis, one end of the second shaft (11) is connected to a central portion of the second inner shell (10), and the other end of the second shaft (11) is connected to a central portion of the second outer shell (9), constraining the second inner shell (10) and the second outer shell (9) together coaxially, and allowing the second outer shell (9) to freely rotate around the second inner shell (10).

10. The inflatable air film structure based on pneumatic power rotation according to claim 1, wherein the fixing component is a third inner shell (19) of a hollow structure, the rotating component is a third outer shell (17) of a hollow structure, and an outer side of the third outer shell (19) is arranged with a protective shell (14); the third inner shell (19), the third outer shell (17) and the protective shell (14) are coaxially nested with each other, and axes of the three coincide with the central rotational axis; and the rotary connection mechanism is a third shaft (18), the third axis (18) is arranged along the central rotational axis, one end of the third shaft (18) is connected to a central portion of the third inner shell (19), and the other end of the third shaft (18) is connected to a central portion of the third outer shell (17), constraining the third inner shell (19) and the third outer shell (17) together coaxially, and allowing the third outer shell (17) to freely rotate around the third inner shell (19).

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