Mooring type floating wind power generation device

Abstract

The invention discloses a mooring type floating wind power generation device, and belongs to the technical field of wind power generation. The device comprises a first bag body, the peripheral surface of the first bag body is a rotary surface, and the diameter of the first bag body is gradually increased from front to back; the peripheral surface of the second capsule body is a rotary surface, the diameter of the second capsule body is gradually reduced from front to back, the second capsule body is arranged on the rear side of the first capsule body at intervals, and a crack is formed between the second capsule body and the first capsule body; the first ring wing sleeves the radial outer side of the crack; the radial outer side of the second bag body is sleeved with the second ring wing; and the contra-rotating fan blades comprise two fan blades with opposite rotating directions, each fan blade comprises a hub and a blade body connected to the hub, the hubs are located in the cracks, and at least part of the fan blades are located outside the cracks in the radial direction and located in the area defined by the first ring wings. According to the mooring type floating wind power generation device, the aerial high-density wind energy capturing capacity is considered, and meanwhile the aerodynamics and the aerial floating capacity of the aerostat are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a tethered floating wind power generation device. Background Art

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind is an energy source that is almost pollution-free. Using wind power for power generation is very environmentally friendly and can generate huge amounts of electricity. Therefore, more and more countries are paying attention to wind power generation technology.

[0003] Most existing wind power generation devices are composed of a tower, a propeller, and a generator. The propeller rotates due to the unbalanced torque generated by the propeller blades contacting the wind, driving the generator to generate electricity. This type of wind power generation device has a low wind energy utilization rate; the tower height is limited, and it can only utilize wind energy near the ground surface, the power generation capacity is not high, and the process is complex and the cost is high.

[0004] In the related technology, a tethered floating power generation system has emerged, which uses airbags to float the platform in the air and uses high-altitude wind power to generate electricity. Because the higher the altitude, the faster the wind speed and the greater the wind energy density in the air, the more conducive it is for the tethered floating power generation system to generate high-power electricity. However, it should be taken into account that air parameters such as atmospheric density and air pressure will decrease with increasing altitude, and parameters such as wind speed and air pressure in the high altitude will fluctuate greatly. How to maintain sufficient aerodynamic lift of the airbag is one of the research directions in this field.

[0005] As for the industry experience of aerostats, ducted bladders are usually used. The bladder itself has a low aspect ratio and the buoyancy is mostly insufficient. In addition, its spatial form is not easy to realize the engineering of a floating bladder that can be greatly deformed, which seriously restricts the development of tethered floating power generation systems to an altitude of thousands or even tens of thousands of meters. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tethered floating wind power generation device on one hand, which improves the aerodynamic lift of the airbag.

[0007] According to an embodiment of the present invention, the tethered floating wind power generation device comprises: a first capsule body, the first capsule body is extended in the front-to-back direction, the outer peripheral surface of the first capsule body is a rotational surface, and the diameter of the first capsule body gradually increases from front to back; a second capsule body, the second capsule body is extended in the front-to-back direction, the outer peripheral surface of the second capsule body is a rotational surface, the diameter of the second capsule body gradually decreases from front to back, the second capsule body is arranged at a distance on the rear side of the first capsule body, and a gap is formed between the second capsule body and the first capsule body; a first ring wing, the first ring wing is sleeved on the radial outside of the gap, and the first ring wing is arranged in the front-to-back direction. The annular wing is located between the front end of the first sac body and the rear end of the second sac body, the front end of the first annular wing is located in front of the gap, and the rear end of the first annular wing is located behind the gap; the second annular wing, the second annular wing is sleeved on the radial outer side of the second sac body, the second annular wing, the second annular wing is arranged at intervals behind the first annular wing; the counter-rotating fan blade, the counter-rotating fan blade includes two fan blades with opposite rotations to connect to the generator, the fan blade includes a hub and blades connected to the hub, the hub is located in the gap, and the fan blade is at least partially located outside the gap in the radial direction and located in the area surrounded by the first annular wing.

[0008] The trailing edge of the first ring wing forms a first ring shape, and the leading edge of the second ring wing forms a second ring shape. On a vertical plane perpendicular to the axis of the first capsule, the projection of the first ring on the plane is completely within the projection of the second ring on the plane.

[0009] The tethered floating wind power generation device of the present application not only takes into account the ability to capture high-density wind energy in the air, but also enhances the aerodynamics and high-altitude floating ability of the airship itself.

[0010] Specifically, compared with the ducted bladder, the configuration of the airship in the embodiment of the present invention can achieve a better aspect ratio due to its main bladder layout of a traditional airship and a shorter ring wing chord length, and has space for arranging auxiliary airbags, which can achieve an operating altitude of kilometers above sea level.

[0011] Compared with the ducted bladder, the counter-rotating blades of the aerostat in the embodiment of the present invention have a higher hub-to-wheel ratio. Therefore, under the same airflow channel area, the radial dimension of the effective aerodynamic part of the blade used in this solution is lower, which helps to save manufacturing costs.

[0012] Compared with the ducted bladder, the airship of the embodiment of the present invention utilizes the first ring wing, the first bladder and the second bladder to form an expansion channel together, which reduces the requirement for the curvature change of the first ring wing and enhances engineering feasibility.

[0013] Compared with the ducted bladder, the airship of the embodiment of the present invention utilizes the first ring wing, the first bladder and the second bladder to form an expansion channel together, which reduces the requirement for the curvature change of the first ring wing and enhances engineering feasibility.

[0014] The second ring wing is arranged at the rear of the airship so that the second ring wing is outside the low-speed wake after power generation, so that it has good aerodynamic efficiency, can stabilize the attitude of the airship, and produce a starting effect of increasing the aerodynamic lift of the airship and adjusting the wake flow of the power generation system.

[0015] In some embodiments, the inner circumferential surface of the first ring wing is a rotating surface; there is an axial gap between the two wind blades; the portion of the inner circumferential surface of the first ring wing from the front end to the axial gap is a first inner ring surface, and the diameter of the first inner ring surface gradually decreases backward; the portion of the inner circumferential surface of the first ring wing from the axial gap to the rear end is a second inner ring surface, and the diameter of the second inner ring surface gradually increases backward.

[0016] Optionally, the axial dimension of the second inner annular surface is at least twice the axial dimension of the first inner annular surface; the axial dimension of the first capsule is at least twice the axial dimension of the first ring wing; the axial dimension of the second capsule is at least twice the axial dimension of the first ring wing.

[0017] Further optionally, the diameter of the outer circumferential surface of the first ring wing gradually increases and then gradually decreases from front to back; the portion of the outer circumferential surface of the first ring wing from the front end to the maximum diameter is the first outer ring surface, and the portion of the outer circumferential surface of the first ring wing from the maximum diameter to the rear end is the second outer ring surface; the axial dimension of the first outer ring surface is at least four times the axial dimension of the second outer ring surface; the front end and the rear end of the first ring wing are both arc angles, and the curvature radius of the front end of the first ring wing is greater than the curvature radius of the rear end.

[0018] In some embodiments, the center of the rear end of the first capsule bulges backward, and the front end of the second capsule bulges forward; the axial dimension of the gap gradually increases radially outward from the center.

[0019] In some embodiments, the second ring wing is a body of revolution.

[0020] Specifically, the minimum inner diameter of the second ring wing is greater than the maximum outer diameter of the first ring wing.

[0021] Specifically, the generatrix of the outer circumferential surface of the first capsule is a part of an ellipse; the generatrix of the outer circumferential surface of the second capsule is a part of an ellipse.

[0022] In some embodiments, the tethered floating wind power generation device further includes: a first rope group connected between the first bladder and the first ring wing; and a second rope group connected between the second bladder and the first ring wing.

[0023] Furthermore, the tethered floating wind power generation device also includes:

[0024] A third rope group is connected between the second bag and the second ring wing.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 A schematic side view of a tethered floating wind power generation device according to some embodiments;

[0028] Figure 2 A three-dimensional schematic diagram of a tethered floating wind power generation device according to some embodiments;

[0029] Figure 3 for Figure 2 The tethered floating wind turbine generator of the embodiment shown in the figure uses CFD to simulate the aerodynamic characteristics, and obtains a surface pressure coefficient cloud diagram and a streamline diagram of the flow through the first ring wing on the middle section;

[0030] Figure 4 for Figure 2 Another aerodynamic characteristic simulation diagram of the tethered floating wind power generation device of the embodiment shown is obtained by using CFD.

[0031] Reference numerals:

[0032] A tethered floating wind power generation device 100;

[0033] First capsule 1, axial dimension L1 of the first capsule;

[0034] The second capsule 2, the axial dimension L2 of the second capsule;

[0035] The first ring wing 3, the axial dimension L3 of the first ring wing, the front end curvature radius R1 of the first ring wing, and the rear end curvature radius R2 of the first ring wing;

[0036] The first inner ring surface s1, the axial dimension L3-1 of the first inner ring surface, the second inner ring surface s2, the axial dimension L3-2 of the second inner ring surface;

[0037] The first outer ring surface s3, the axial dimension n1 of the first outer ring surface, the second outer ring surface s4, the axial dimension n2 of the second outer ring surface;

[0038] The second ring wing 4, the front end curvature radius R3 of the second ring wing, and the rear end curvature radius R4 of the second ring wing;

[0039] Counter-rotating blades 5, blades 50, hub 51, blades 52, diameter d1 of the hub, outer diameter d2 of the blades;

[0040] The gap 6, the axial gap 61;

[0041] The first rope group 71 , the second rope group 72 , and the third rope group 73 . DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The following describes a tethered floating wind power generation device 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0046] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, a tethered floating wind power generation device 100 includes: a first capsule 1, a second capsule 2, a first ring wing 3, a second ring wing 4 and a counter-rotating wind blade 5.

[0047] The first capsule 1 is extended along the front-to-back direction, the outer peripheral surface of the first capsule 1 is a rotational surface, and the diameter of the first capsule 1 gradually increases from front to back.

[0048] The second capsule 2 is extended in the front-to-back direction, the outer peripheral surface of the second capsule 2 is a rotational surface, the diameter of the second capsule 2 gradually decreases from front to back, the second capsule 2 is arranged at a distance on the rear side of the first capsule 1, and a gap 6 is formed between the second capsule 2 and the first capsule 1.

[0049] The first ring wing 3 is sleeved on the radially outer side of the slit 6. In the front-to-back direction, the first ring wing 3 is located between the front end of the first capsule 1 and the rear end of the second capsule 2. In other words, the front end of the first ring wing 3 does not exceed the front end of the first capsule 1, and the rear end of the first ring wing 3 does not exceed the rear end of the second capsule 2.

[0050] The front end of the first ring wing 3 is located in front of the slit 6, and the rear end of the first ring wing 3 is located behind the slit 6. The second ring wing 4 is sleeved on the radially outer side of the second capsule 2, and the second ring wing 4 is arranged behind the first ring wing 3 at intervals.

[0051] The counter-rotating blades 5 include two blades 50 rotating in opposite directions to connect to the generator. The blades 50 include a hub 51 and blades 52 connected to the hub 51. The hub 51 is located in the gap 6. The blades 50 are at least partially located outside the gap 6 in the radial direction and in the area surrounded by the first ring wing 3.

[0052] Among them, Figure 1 As shown by the dotted line, the trailing edge of the first ring wing 3 forms a first ring shape, and the leading edge of the second ring wing 4 forms a second ring shape. On a vertical plane perpendicular to the axis of the first capsule 1, the projection of the first ring on the plane is completely within the projection of the second ring on the plane.

[0053] Here, the platform of the tethered floating wind power generation device 100 is also referred to as an airship, that is, the airship includes a first bladder 1 , a second bladder 2 , a first ring wing 3 and a second ring wing 4 .

[0054] The first bladder 1 and the second bladder 2 are the central part of the aerostat and are also the main bladders of the aerostat. The first bladder 1 and the second bladder 2 are arranged to penetrate the front and back of the aerostat. The first bladder 1 and the second bladder 2 are used to be filled with buoyancy gas, such as helium or hydrogen. There is no restriction on the type of buoyancy gas.

[0055] In the present application, the front-to-back direction is consistent with the axial direction of the airship. After the airship of the present application is put into the air, when wind is generated in the air, the airflow will usually flow along the axial direction of the airship when passing through the airship, or the airship will actively adjust the axial direction of the airship to be consistent with the wind direction. Among them, the front end of the airship is the windward side, that is, the airflow blows through the airship from front to back. The first ring wing 3 and the second ring wing 4 are regulating airbags of the airship, which are used to regulate the high-altitude buoyancy of the airship. The first ring wing 3 and the second ring wing 4 are filled with gas, for example, they can be filled with air or other gases.

[0056] The counter-rotating blades 5 are arranged at the gap 6 between the first capsule 1 and the second capsule 2, and the blades 52 of the counter-rotating blades 5 need to extend out of the gap 6 to pass the airflow, so the counter-rotating blades 5 use high hub-to-hub ratio counter-rotating wind power generation blades. The hub-to-hub ratio is generally defined as the ratio of the diameter of the hub 51 to the outer diameter of the blades 52 of the blades 50. Preferably, the diameter d1 of the hub 51 is at least 0.55 times the outer diameter d2 of the blades 50. Of course, the hub-to-hub ratio can also be selected as 0.45, 0.48, 0.55, 0.58, 0.60, etc.

[0057] The first capsule 1 and the second capsule 2 that pass through the center can be roughly considered as a traditional low-drag airship shape, which is divided into two sections, the first capsule 1 and the second capsule 2, after being interrupted by a middle partition. This traditional configuration usually has a good body-to-surface ratio parameter, saving a lot of skin material and weight. At the same time, since the internal space of the first capsule 1 and the second capsule 2 is extremely free and wide, it is convenient to arrange and adjust the matching components in the buoyancy. In addition, there is enough space to arrange the generator of the counter-rotating blades 5. The position of the generator is not shown in the figure, and the generator can be arranged inside at least one of the first capsule 1 and the second capsule 2.

[0058] Reference Figure 3 The aerodynamic characteristics of the tethered floating wind power generation device 100 of some embodiments are simulated by CFD. In the simulation, the aerostat is set to have a 10 degree elevation angle, and the excitation disk model is used to replace the airflow blocking effect of the blade 52. As a result, the surface pressure coefficient cloud map and the streamline map of the flow through the first ring wing 3 on the middle section are obtained.

[0059] The counter-rotating blades 5 are located between the first capsule 1 and the second capsule 2 .

[0060] The maximum thickness of the airfoil of the first ring wing 3 is located on the same axis as the counter-rotating blades 5. That is, the center of the maximum thickness of the airfoil of the first ring wing 3 is the first center point, the midpoint of the centers of the two blades 50 of the counter-rotating blade 5 is the second center point, and the coordinate position of the first center point is the same as the coordinate position of the second center point, taking the direction of the main axis of the aircraft as the coordinate axis.

[0061] The front edge of the first ring wing 3 is located at the front end of the maximum diameter of the first capsule 1, and the rear edge of the first ring wing 3 is located at the rear end of the maximum diameter of the second capsule 2. The second ring wing 4 is located at the rear end of the first ring wing 3 and the front end of the trailing edge of the second capsule 2.

[0062] A circular power generation system airflow channel is formed between the first ring wing 3 and the first capsule 1 and the second capsule 2. The channel is a first-convergent and then-expanding airflow channel, and the counter-rotating fan blade 5 is located at the throat of the first-convergent and then-expanding airflow channel. The airflow is accelerated from the front end of the first capsule 1 through the contraction airflow channel and reaches the counter-rotating fan blade 5. After passing through the blade 52 of the counter-rotating fan blade 5, the airflow passes through the expansion airflow channel.

[0063] The first ring wing 3 is in the high-speed airflow area, providing high aerodynamic lift. The second ring wing 4 is outside the low-speed wake after power generation, providing high aerodynamic lift. The aerodynamic pressure center under the joint action of the first bladder 1, the second bladder 2, the first ring wing 3, and the second ring wing 4 is located at the rear end of the buoyancy center, and the system has a self-aligning torque when facing the wind.

[0064] It can be seen that the two ring wings (i.e., the first ring wing 3 and the second ring wing 4) in this embodiment have a large area of ​​dark negative pressure area in the lift direction perpendicular to the incoming flow, generating a large amount of aerodynamic lift. In this embodiment, the ratio of aerodynamic downforce or lift provided by the main bladder (the first bladder 1 and the second bladder 2), the first ring wing 3, and the second ring wing 4 is -1.1:8.5:5.5. It can be seen that although the main bladder exhibits downforce under the combined influence of the ring wings and power generation, it can be seen from the ratio that the lift brought by the two ring wings is much higher than the downforce of the main bladder, so it is ultimately manifested as a significant increase in aerodynamic lift.

[0065] In the present invention, since the blades 52 for power generation are arranged at the maximum radius of the central through-body and in the throat formed between the first ring wings 3, these two components of the airship directly determine the hub ratio of the blades 52 for power generation. The hub ratio does not affect the power generation efficiency within a certain reasonable value range, but the significance is that under the same power generation, the larger the hub ratio means that the high-speed airflow will be gathered into a smaller airflow channel, so the size of the blades 52 can be shortened, which is very beneficial to engineering practice and cost control.

[0066] The upper limit of the hub ratio is determined by when flow separation will occur in the airflow expansion section. Figure 4 As shown, the streamlines show the process of airflow acceleration (geometric contraction, streamline spacing becomes smaller) and airflow deceleration (geometric expansion, streamline spacing becomes larger) in the channel formed by the first ring wing 3 and the central through-body. When the trailing edge diameter of the first ring wing 3 remains unchanged and the hub ratio increases, it is obvious that the airflow deceleration process will become more intense and the adverse pressure gradient will be stronger, which can easily induce flow separation, making the effective expansion ratio of the airflow much lower than the geometric expansion ratio.

[0067] In summary, the tethered floating wind power generation device 100 of the present application has many advantages:

[0068] 1. Compared with the ducted bladder, the configuration of the aerostat in the embodiment of the present invention has the main bladder layout of the traditional airship and a shorter ring wing chord length, which can achieve a better aspect ratio and has space for arranging auxiliary airbags, and can achieve an operating altitude of kilometers above sea level.

[0069] 2. Compared with the ducted bladder, the aerostat of the embodiment of the present invention has two ring wings, which has obvious aerodynamic gain in improving the net lift and lift-to-drag ratio of the whole aerostat.

[0070] 3. Compared with the ducted bladder, the counter-rotating blades 5 of the aerostat in the embodiment of the present invention have a higher hub-wheel ratio. Therefore, under the same airflow channel area, the radial size of the effective aerodynamic part of the blade used in this solution is lower, which helps to save manufacturing costs.

[0071] 4. Compared with the ducted bladder, the airship of the embodiment of the present invention utilizes the first ring wing 3 together with the first bladder 1 and the second bladder 2 to form an expansion channel, which reduces the requirement for the curvature change of the first ring wing 3 and enhances the engineering feasibility.

[0072] In some embodiments, the inner circumference of the first ring wing 3 is a rotating surface. An axial gap 61 is provided between the two wind blades 50. The portion of the inner circumference of the first ring wing 3 from the front end to the axial gap 61 is the first inner ring surface s1, and the diameter of the first inner ring surface s1 gradually decreases backward. The portion of the inner circumference of the first ring wing 3 from the axial gap 61 to the rear end is the second inner ring surface s2, and the diameter of the second inner ring surface s2 gradually increases backward.

[0073] Such arrangement is conducive to providing an axial gap 61 between the two fan blades 50, which is arranged exactly at the throat of the airflow channel that contracts first and then expands. In this way, the two fan blades 50 are exactly located at the point where the wind speed is the highest in the airflow channel, greatly enhancing the power generation efficiency.

[0074] Optionally, the axial dimension L3-2 of the second inner annular surface s2 is at least twice the axial dimension L3-1 of the first inner annular surface s1. The axial dimension L1 of the first capsule 1 is at least twice the axial dimension L3 of the first ring wing 3. The axial dimension L2 of the second capsule 2 is at least twice the axial dimension L3 of the first ring wing 3.

[0075] Further optionally, the diameter of the outer peripheral surface of the first ring wing 3 gradually increases and then gradually decreases from front to back;

[0076] The portion of the outer circumferential surface of the first ring wing 3 from the front end to the largest diameter is the first outer ring surface s3 , and the portion of the outer circumferential surface of the first ring wing 3 from the largest diameter to the rear end is the second outer ring surface s4 .

[0077] The axial dimension n1 of the first outer ring surface s3 is at least four times the axial dimension n2 of the second outer ring surface s4.

[0078] The front end and the rear end of the first ring wing 3 are both arc angles, and the curvature radius of the front end of the first ring wing 3 is greater than the curvature radius of the rear end, that is, Figure 1 In the embodiment, the front end curvature radius R1 of the first ring wing 3 is greater than the rear end curvature radius R2 of the first ring wing 3 .

[0079] That is to say, the first ring wing 3 is in the shape of a rotating body, and the ring wing airfoil is a low-speed airfoil with a round head and a pointed tail.

[0080] In some embodiments, Figure 1 and Figure 2 As shown, the minimum inner diameter of the second ring wing 4 is greater than the maximum outer diameter of the first ring wing 3 .

[0081] The second ring wing 4 is arranged at the rear of the aerostat, and its diameter is larger than that of the first ring wing 3. This measure makes the second ring wing 4 outside the low-speed wake after power generation, so that it has good aerodynamic efficiency, can stabilize the attitude of the aerostat, and produce a starting effect of increasing the aerodynamic lift of the aerostat and adjusting the wake flow of the power generation system.

[0082] The front end and the rear end of the second ring wing 4 are both arc angles, and the curvature radius of the front end of the second ring wing 4 is greater than the curvature radius of the rear end, that is, Figure 1 In the embodiment, the front end curvature radius R3 of the second ring wing 4 is greater than the rear end curvature radius R4 of the second ring wing 4.

[0083] Further reference Figure 4 , the surface pressure distribution of the second ring wing 4 can be observed in terms of aerodynamic stability. Since the second ring wing 4 is at the rear end of the aircraft in the axial direction, its aerodynamic force brings a self-aligning moment relative to the rotation center of the aerostat, which makes the aerostat "facing the incoming flow". At the same time, since this embodiment is a circumferentially symmetrical rotating body, the self-aligning moment exists for both the pitch and yaw incoming flow angles, and has good aerodynamic stability, that is, it has the ability to point to the windward direction, so that when airflow blows through the aerostat, the front end of the aerostat is automatically adjusted to the windward end under the regulation of the second ring wing 4.

[0084] Specifically, the second ring wing 4 is in the shape of a rotating body, and the ring wing airfoil is a low-speed airfoil with a round head and a pointed tail.

[0085] In some embodiments, the axial dimension of the slot 6 gradually increases from the center radially outward, which is just helpful to keep the airflow flowing along the throat of the airflow channel.

[0086] In some embodiments, reference Figure 1 and Figure 2The center of the rear end of the first capsule 1 bulges backward, and the front end of the second capsule 2 bulges forward, so that the rear end of the first capsule 1 is located in the area surrounded by the first ring wing 3, and the diameter gradually decreases backward.

[0087] Specifically, the first capsule 1 is a rotating body, more specifically, the first capsule 1 is a streamlined shape, and the generatrix of the outer peripheral surface of the first capsule 1 can be an ellipse or other curves with gradually increasing curvature radius. The rear end of the first capsule 1 is generally a maximum cross-section that is naturally expanded under the action of internal pressure.

[0088] A secondary airbag is arranged inside the first bladder 1 to adjust the internal pressure of the aerostat and maintain the aerodynamic shape of the aerostat.

[0089] Specifically, the second capsule 2 is a rotating body shape, more specifically, the second capsule 2 is a streamlined shape, and the generatrix of the outer peripheral surface of the second capsule 2 can be an ellipse or other curves with gradually increasing curvature radius. The front end of the second capsule 2 is generally a maximum cross-section that is naturally expanded under the action of internal pressure.

[0090] A secondary airbag is arranged inside the second bladder 2 to adjust the internal pressure of the aerostat and maintain the aerodynamic shape of the aerostat.

[0091] In some embodiments, the tethered floating wind power generation device 100 further includes: a first rope group 71 connected between the first bladder 1 and the first ring wing 3 , and a second rope group 72 connected between the second bladder 2 and the first ring wing 3 .

[0092] The use of a rope group to connect the first bladder 1, the second bladder 2, and the first ring wing 3 can significantly reduce the overall weight of the aerostat and reduce the impact on airflow resistance. It is also convenient for the aerostat to be stored, as the rope group can be easily rolled up.

[0093] Furthermore, the tethered floating wind power generation device 100 further includes: a third rope group 73 connected between the second bladder 2 and the second ring wing 4. The use of the rope group to connect the second bladder 2 and the second ring wing 4 can greatly reduce the overall weight of the aerostat and reduce the impact on airflow resistance. It is also convenient for the aerostat to be stored, and the rope group is convenient for winding and storage.

[0094] Of course, at least one of the first rope group 71, the second rope group 72, and the third rope group 73 in the present application can also be replaced by other structures, such as a supporting structure such as a beam structure or a truss structure.

[0095] Other components of the tethered floating wind power generation device 100 according to the embodiment of the present invention, such as the structures and principles of the generator and various air valves, are well known to those skilled in the art and will not be described in detail here.

[0096] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tethered floating wind power generation device, characterized in that: include: A first capsule body, wherein the first capsule body is extended in the front-to-back direction, the outer peripheral surface of the first capsule body is a rotational surface, and the diameter of the first capsule body gradually increases from front to back; A second capsule, the second capsule is extended along the front-to-back direction, the outer peripheral surface of the second capsule is a rotational surface, the diameter of the second capsule gradually decreases from front to back, the second capsule is arranged at a distance from the first capsule, and a gap is formed between the second capsule and the first capsule; a first ring wing, wherein the first ring wing is sleeved on the radially outer side of the slit, and the first ring wing is located between the front end of the first capsule and the rear end of the second capsule in the front-to-back direction, the front end of the first ring wing is located in front of the slit, and the rear end of the first ring wing is located behind the slit; A second ring wing, wherein the second ring wing is sleeved on the radially outer side of the second capsule, and the second ring wing is arranged behind the first ring wing at intervals; A counter-rotating blade, the counter-rotating blade comprising two blades rotating in opposite directions to connect to a generator, the blade comprising a hub and blades connected to the hub, the hub being located in the gap, and the blade being at least partially located outside the gap in a radial direction and in an area surrounded by the first ring wing; The trailing edge of the first ring wing forms a first ring shape, and the leading edge of the second ring wing forms a second ring shape. On a vertical plane perpendicular to the axis of the first capsule, the projection of the first ring on the plane is completely within the projection of the second ring on the plane.

2. The tethered floating wind power generation device according to claim 1, characterized in that: The inner peripheral surface of the first ring wing is a rotational surface; There is an axial gap between the two wind blades; The portion of the inner circumferential surface of the first ring wing from the front end to the axial gap is a first inner ring surface, and the diameter of the first inner ring surface gradually decreases backwards; The portion of the inner circumferential surface of the first annular wing from the axial gap to the rear end is a second inner annular surface, and the diameter of the second inner annular surface gradually increases toward the rear.

3. The tethered floating wind power generation device according to claim 2, characterized in that: The axial dimension of the second inner annular surface is at least twice the axial dimension of the first inner annular surface; The axial dimension of the first capsule is at least twice the axial dimension of the first ring wing; The axial dimension of the second capsule is at least twice the axial dimension of the first ring wing.

4. The tethered floating wind power generation device according to claim 2, characterized in that: The diameter of the outer peripheral surface of the first ring wing gradually increases and then gradually decreases from front to back; The portion of the outer circumference of the first ring wing from the front end to the largest diameter is the first outer ring surface, and the portion of the outer circumference of the first ring wing from the largest diameter to the rear end is the second outer ring surface; The axial dimension of the first outer annular surface is at least four times the axial dimension of the second outer annular surface; The front end and the rear end of the first ring wing are both arc angles, and the front end curvature radius of the first ring wing is greater than the rear end curvature radius.

5. The tethered floating wind power generation device according to claim 1, characterized in that: The center of the rear end of the first capsule body bulges backward, and the front end of the second capsule body bulges forward; The axial dimension of the gap gradually increases from the center radially outwards.

6. The tethered floating wind power generation device according to claim 1, characterized in that: The second ring wing is a body of revolution.

7. The tethered floating wind power generation device according to claim 6, characterized in that: The minimum inner diameter of the second ring wing is greater than the maximum outer diameter of the first ring wing.

8. The tethered floating wind power generation device according to any one of claims 1 to 7, characterized in that: The generatrix of the outer peripheral surface of the first capsule is a part of an ellipse; The generatrix of the outer peripheral surface of the second capsule is a part of an ellipse.

9. The tethered floating wind power generation device according to any one of claims 1 to 7, characterized in that: Also includes: a first rope group connected between the first bladder and the first ring wing; A second rope group is connected between the second bag and the first ring wing.

10. The tethered floating wind power generation device according to any one of claims 1 to 7, characterized in that: Also includes: A third rope group is connected between the second bag and the second ring wing.

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