Method for enhancing friction force of high-altitude wind power single winding drum

Abstract

The invention relates to the technical field of high-altitude wind power, in particular to a method for enhancing friction force of a high-altitude wind power single winding drum. According to the method for enhancing the friction force of the high-altitude wind power single winding drum, by arranging the pressing device connected with the winding drum, the cable wound on the single winding drum can be pressed through the pressing device, the contact stress between the cable and the winding drum is increased, and therefore the friction force between the cable and the winding drum is enhanced; the problems that a single-winding-drum scheme is insufficient in friction force and a double-winding-drum scheme is low in transmission efficiency are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-altitude wind power, and in particular to a method for enhancing the friction of a single drum in high-altitude wind power. Background Art

[0002] A high-altitude wind power generation (hereinafter referred to as high-altitude wind power) system generally uses the wind power at an altitude of 500 to 12,000 meters above the ground to generate electricity. Compared with traditional high-tower and three-blade wind turbines, high-altitude wind turbines can obtain wind energy with higher wind speed, smaller turbulence, and more stable wind direction from high altitudes.

[0003] In the related art, there are two technical paths for the high-altitude wind power ground system, namely, a single-drum scheme and a double-drum scheme. However, the single-drum scheme has the problem of insufficient friction, and the double-drum scheme has the problem of low transmission efficiency.

[0004] Based on this, there is an urgent need to provide a method for enhancing the friction of a single drum in high-altitude wind power to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a method for enhancing the friction of a single drum in high-altitude wind power, which can increase the normal pressure between the cable and the drum by pressing, so as to increase the friction between the cable and the drum, thereby solving the problems of insufficient friction in the single-drum scheme and low transmission efficiency in the double-drum scheme.

[0006] An embodiment of the present invention provides a method for enhancing the friction of a single drum in high-altitude wind power, including:

[0007] When obtaining high-altitude wind energy, a pressing device is used to press the cable wound around a single drum to increase the contact stress between the cable and the drum, thereby enhancing the friction between the cable and the drum; wherein, the pressing device is connected to the drum.

[0008] As can be seen from the above solution, the method for enhancing the friction of a single drum in high-altitude wind power provided by the present invention is provided with a pressing device connected to the drum, so that the pressing device can be used to press the cable wound around a single drum, increase the contact stress between the cable and the drum, thereby enhancing the friction between the cable and the drum, and solving the problems of insufficient friction in the single-drum scheme and low transmission efficiency in the double-drum scheme. Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 This is an application scenario diagram for obtaining high-altitude wind energy provided by an embodiment of the present invention;

[0011] Figure 2 is Figure 1 A schematic diagram of the cooperation of the drum, the pressing device and the cable in the application scenario shown;

[0012] Figure 3 This is a flowchart for optimizing the pressing parameters provided by an embodiment of the present invention;

[0013] Figure 4 This is a schematic diagram of two extreme working conditions of the cooperation between the cable and the pressing block provided by an embodiment of the present invention;

[0014] Figure 5 This is a schematic diagram of the tension of the tight side and the loose side of the cable after pressurization provided by an embodiment of the present invention;

[0015] Figure 6 This is a schematic diagram of the structure of the pressing device provided by an embodiment of the present invention;

[0016] Figure 7 is Figure 6 A schematic diagram of the structure when the pressing device cooperates with the drum and the cable shown;

[0017] Reference numerals:

[0018] 1 - Universal pulley seat; 2 - Drum; 3 - Pressing device; 4 - Electric energy conversion device; 5 - Cable arranging device; 6 - Rope storage device; 7 - Cable; 11 - Support rod; 12 - First machine base; 21 - First pressing rod; 22 - Second pressing rod; 23 - Moving rod; 31 - First rotating rod; 32 - Second rotating rod; 33 - Second machine base; 41 - Upper cover; 42 - Lower cover; 43 - Guide shaft; 44 - Spring; 51 - First movable wheel; 52 - Second movable wheel; 53 - First track; 54 - Second track. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 , an embodiment of the present invention provides a method for enhancing the friction of a single drum in high-altitude wind power, and the method includes:

[0021] When obtaining high-altitude wind energy, a pressing device 3 is used to press the cable 7 wound around a single reel 2 to increase the contact stress between the cable 7 and the reel 2, thereby enhancing the friction between the cable 7 and the reel 2; wherein, the pressing device 3 is connected to the reel 2.

[0022] In this embodiment, by providing a pressing device 3 connected to the reel 2, the cable 7 wound around a single reel 2 can be pressed by the pressing device 3, increasing the contact stress between the cable 7 and the reel 2, thereby enhancing the friction between the cable 7 and the reel 2, and solving the problems of insufficient friction in the single-reel solution and low transmission efficiency in the double-reel solution.

[0023] In Figure 1 the application scenario, the universal pulley seat 1 deflects the cable 7 in any direction in the air into a fixed direction and winds it through the friction reel 2, and then the cable 7 is wound by the cable arranging device 5 and neatly arranged and stored on the rope storage device 6. The electric energy conversion device 4 is connected to the friction reel 2, and the pressing device 3 is connected to the friction reel 2. The working principle is as follows: The aerial device (such as an umbrella ladder) collects high-altitude wind energy, and the cable 7 is wound around the friction reel 2 through the universal pulley seat 1. Part of the pressing device 3 presses the cable 7 to enable the friction reel 2 to obtain sufficient friction, driving the electric energy conversion device 4 (which can be a generator, for example) to rotate and convert mechanical energy into electric energy; the cable 7 then enters the rope storage device 6 through the cable arranging device 5.

[0024] It can be understood that some related technologies adopt a double-reel and double-motor solution. However, this solution has high requirements for system control, and the two motors need to cooperate synchronously. When there is a speed difference between the two reels, the relative slip between the cable and the reel increases. At the same time, in this solution, the initial tension of the cable needs to be wound around the reel multiple times through Euler attenuation to reach the minimum tension requirement for high-altitude wind power generation, and sufficient friction is obtained by increasing the wrap angle between the cable and the reel. The multi-turn winding will increase the stiffness loss of the cable during winding and unwinding. In the embodiment of the present invention, by adopting a pressing method, sufficient friction is obtained using a single reel, a single motor, and a single-turn winding of the cable, reducing the requirements for motor control and reducing the stiffness loss of the cable during winding and unwinding. In addition, in this solution, a rope storage device is also provided, and the ascending length of the cable is not limited by the size of the friction reel, which is beneficial to obtaining wind energy with a higher wind energy density.

[0025] As Figure 2 shown, in an embodiment of the present invention, a pressing block is provided at the end of each pressing device 3 ( Figure 2 only the pressing block can be seen in Figure 6 ), and the pressing parameters of the pressing device 3 include the number of pressing blocks, the arc length of the pressing blocks, and the pressing pressure;

[0026] Use the pressing device 3 to press the cable 7 wound around a single reel 2, including:

[0027] Optimize the pressing parameters;

[0028] Use the pressing device 3 to press the cable 7 wound around a single reel 2 according to the optimized pressing parameters.

[0029] In this embodiment, by optimizing the pressing parameters of the pressing device 3, the numerical values of the pressing parameters can be calculated according to specific requirements, so as to better provide a theoretical basis for engineering practice.

[0030] As Figure 3 shown, in an embodiment of the present invention, optimizing the pressing parameters includes:

[0031] Based on the initial tight-side tension of the cable for high-altitude wind power, determine the cable diameter and the minimum reel radius;

[0032] Based on the minimum reel radius and the initial tight-side tension, determine the maximum specific pressure line density load that the cable can withstand;

[0033] Select the target number of pressing blocks within the preset limit range of the number of pressing blocks;

[0034] Select a target reel radius greater than the minimum reel radius;

[0035] S1. Based on the target reel radius and the target number of pressing blocks, determine the target pressing block arc length;

[0036] S2. Based on the target number of pressing blocks and the preset winding wrap angle of the cable, determine the minimum number of working pressing blocks;

[0037] S3. Based on the actual tight-side tension and actual loose-side tension of the cable in the natural winding state, the winding wrap angle, the equivalent friction coefficient between the cable and the reel, the minimum number of working pressing blocks, and the wrap angle between each pressing block, determine the target pressing block pressure;

[0038] S4. Based on the target pressing block pressure and the target pressing block arc length, determine the actual specific pressure line density load for applying the pressing block pressure;

[0039] S5. Based on the maximum specific pressure line density load that the cable can withstand, the actual tight-side tension, and the target reel radius, determine the additional specific pressure line density load that the cable can withstand when the reel radius is the target reel radius;

[0040] S6. Based on the actual specific pressure line density load for applying the pressing block pressure and the additional specific pressure line density load that the cable can withstand, determine whether the selection of the target reel radius is appropriate;

[0041] If appropriate, use the current number of target pressing blocks, the arc length of the target pressing block, and the pressure of the target pressing block as the optimized results.

[0042] If not appropriate, continue to increase the target drum radius and loop through steps S1 - S6 until it is determined that the selected target drum radius is appropriate, and use the current number of target pressing blocks, the arc length of the target pressing block, and the pressure of the target pressing block as the optimized results.

[0043] In this embodiment, based on the initial tight - side tension of the cable for high - altitude wind power, the cable diameter, the initial drum radius, and the maximum specific pressure - line density load that the cable can withstand are determined. Finally, when the selected target drum radius is appropriate, the corresponding number of target pressing blocks, the arc length of the target pressing block, and the pressure of the target pressing block can be determined and used as the optimized results, thereby providing specific theoretical guidance for engineering practice.

[0044] Determine the target slack - side tension F′1 according to the requirements of high - altitude wind power generation. According to the requirements of high - altitude wind power generation, the tight - side tension of the cable should decay to the target slack - side tension F′1 within the wrap angle α.

[0045] The relationship between the actual slack - side tension F1 and the actual tight - side tension F2 in the natural winding state of the cable conforms to the Euler formula:

[0046] F1 = F2e -fα

[0047] Compare the actual slack - side tension F1 with the target slack - side tension F′1. When F1 > F′1, the torque transmitted by the cable through the friction drum is less than the required torque, and the friction force needs to be increased by pressurization to increase the torque transmitted by friction; when F1 < F′1, the torque transmitted by friction meets the requirements and no additional pressurization is required.

[0048] In an embodiment of the present invention, the cable diameter is determined according to the cable breaking - force requirement, and the cable breaking - force requirement is:

[0049] F 破 ≥ηF0

[0050] In the formula, F 破 is the cable breaking - force, η is the preset safety factor, and F0 is the initial tight - side tension;

[0051] The minimum drum radius is 10 times the cable diameter;

[0052] The preset limit range is 24 - 52.

[0053] In this embodiment, according to the requirements of the cable breaking force and the current national standard GB / T30668-2014, the diameter d of the ultra-high molecular weight polyethylene cable for high-altitude wind power can be determined. According to the current IOS standard ISO / TS23624-2021, the maximum ratio of the diameter of the high-performance fiber rope to the diameter of the drum is 1:20. Thus, the minimum drum radius R that satisfies the ratio of the rope to the drum diameter can be determined. min , when this condition is met, the working requirements can be satisfied, that is, the cable can meet the requirements of the breaking force and the contact pressure between the rope and the drum under this condition.

[0054] In addition, considering the complexity of the mechanism and the requirements for the working stability of the pressure block (too few pressure blocks will cause relatively large fluctuations in the cable during the switching process between the tightened and released states, which is not conducive to the working stability), the center distance of the pressure blocks on the circumference is selected to be between 7° and 15°, that is, the total number of pressure blocks N is between 24 and 52.

[0055] In an embodiment of the present invention, the maximum specific pressure line density load that the cable can withstand is determined by the following formula:

[0056] P ρmax =F0 / R min =F0 / (10d)

[0057] In the formula, P ρmax is the maximum specific pressure line density load that the cable can withstand, R min is the minimum drum radius, and d is the cable diameter.

[0058] In an embodiment of the present invention, the target arc length of the pressure block is determined by the following formula:

[0059] L = 2βπR / N

[0060] In the formula, L is the target arc length of the pressure block, β is the clearance coefficient, the clearance coefficient is the percentage of the total arc length of the pressure block to the circumference of the drum, R is the target drum radius, and N is the number of target pressure blocks.

[0061] In this embodiment, considering the gaps between the pressure blocks, the clearance coefficient is introduced here, so that the arc length of the pressure block can be determined.

[0062] In an embodiment of the present invention, the minimum number of working pressure blocks is determined by the following formula:

[0063]

[0064] In the formula, n min is the minimum number of working pressure blocks, floor() is the floor function, and ɑ is the winding wrap angle.

[0065] In this embodiment, there are two extreme working conditions, see Figure 4, (only for explaining the phenomena of two extreme working conditions) If the calculated number of working pressure blocks is eight, as shown in State 2, that is, the first working pressure block has just completely wound into the wrap angle α. At this time, the number of working pressure blocks within the wrap angle is the largest. In State 1, the non - working pressure block has just wound into the wrap angle α, and at this time, the number of working pressure blocks within the wrap angle is the smallest, which is seven. To ensure that under a certain pressure of the pressure block, any winding working condition can meet the demand of the pressing friction force, the minimum number of working pressure blocks n is determined min is:

[0066]

[0067] In an embodiment of the present invention, the target pressure of the pressure block is determined by the following formula:

[0068]

[0069] In the formula, P is the target pressure of the pressure block, F2 is the actual tight - side tension, F1 is the actual slack - side tension, f is the equivalent friction coefficient, i is the i - th pressure block, and Δθ is the wrap angle between each pressure block.

[0070] In this embodiment, when the pressurizing method is adopted, the formula for the tight - side tension after applying a uniformly distributed pressure within the entire specified wrap angle is (as shown in Figure 5 a, and the symbols not shown in the following formula are simplified and cancelled out during the calculation process): Figure 5 F2 = e

[0071] F2 = e fα F1 + 2P ρ R(e fα - 1)

[0072] The formula for the tight - side tension of the pressure block when applying a uniformly concentrated pressure at any θ within the wrap angle is (as shown in Figure 5 b):

[0073] F2 = e fα F1 + 2Pfe f(α-θ)

[0074] The formula for the tight - side tension of the pressure block when applying a uniformly concentrated pressure at multiple places within the wrap angle is (as shown in Figure 5 c):

[0075]

[0076] Transform this formula into:

[0077]

[0078] Thus, when the minimum number of working pressure blocks is n min , the magnitude of the pressure of the pressure block P can be calculated.

[0079] In an embodiment of the present invention, the actual specific line pressure density load is determined by the following formula:

[0080] P ρ = P / L

[0081] In the formula, P ρ is the actual specific line pressure density load.

[0082] In an embodiment of the present invention, the additional specific line pressure density load that the cable can withstand is determined by the following formula:

[0083] P ρ ′ = P ρmax - F2 / R

[0084] In the formula, P ρ ′ is the additional specific line pressure density load that the cable can withstand; P ρ ≤ P ρ ′, indicating that the selected target drum radius is appropriate; P ρ > P ρ ′, indicating that the selected target drum radius is inappropriate.

[0085] In this embodiment, compare P ρ with P ρ ′. When P ρ ≤ P ρ ′, that is, the actual specific line pressure density load of the pressing block is less than or equal to the additional specific line pressure density load that the cable can withstand at the drum radius R, which meets the pressing condition. At this time, the cable diameter d, the drum radius R, the number N of target pressing blocks, the arc length L of the pressing block, and the pressing block pressure P can be determined. When P ρ > P ρ ′, that is, the actual specific line pressure density load of the pressing block exceeds the additional specific line pressure density load that the cable can withstand at the drum radius R, which does not meet the pressing condition. It means that the selected drum radius R is too small, and the drum radius should be increased and steps S1 - S6 should be executed cyclically for verification until the condition is met.

[0086] For example:

[0087] The initial cable tension F0 of high-altitude wind power generation is 110t. It is required that the cable slack-side tension decays from the initial tension F0 to 0 within a wrap angle of 225° (i.e., F′1 = 0). After calculation, F1 = 50t. Since F1 > F′1, pressurization is required.

[0088] Select a safety factor of 4, and 440t < F 破 , and select a cable diameter of 100mm according to the GB / T30668 - 2014 standard;

[0089] Determine that the minimum radius of the drum R1 > 1 m, and select R as 1.1 m in this embodiment;

[0090] The maximum specific pressure line density that the cable can withstand is 0.11 tons / mm;

[0091] Select the total number of pressing blocks as 40, then the number of effective working pressing blocks in the wrap angle of 225° is 24;

[0092] Select the clearance coefficient β as 0.9, and calculate the arc length L of the pressing block as 155 mm;

[0093] Calculate the pressure P of the pressing block as 7.557 t;

[0094] Calculate the specific pressure line density load P applied by the pressing block ρ is 35.65 t / m;

[0095] Calculate the additional specific pressure line density load P that the cable can withstand when the drum radius is 1.1 m ρ ′ is 10 t / m;

[0096] At this time, P ρ > P ρ ′, exceeding the pressurization limit of the cable at this drum radius, there is a risk of cable crushing. At this time, increase R to 1.5 m; calculate the additional specific pressure line density load P that the cable can withstand when the drum radius is 1.5 m with other variables unchanged ρ ′ is 36.7 t / m;

[0097] At this time, P ρ < P ρ ′, meeting the conditions, it can be determined that the cable diameter is 100 mm, the drum radius is 1.5 m, the total number of pressing blocks is 40, the arc length of the pressing block is 212 mm, and the pressure of the pressing block is 7.557 t.

[0098] Next, a specific example is used to introduce the specific structure of the pressing device.

[0099] As Figure 6 and Figure 7 shown, the embodiment of the present invention provides a pressing device for pressurizing a cable wound around a single drum of high-altitude wind power, including:

[0100] A fixed component, fixed on the side wall of a single drum of high-altitude wind power;

[0101] A main shaft component, connected to the fixed component and movable relative to the fixed component, and a pressing block is provided at the end of the main shaft component;

[0102] A rotating component, connected to the main shaft component and capable of rotating when the main shaft component moves;

[0103] An elastic component, connected to the main shaft component, can provide elastic force to the main shaft component when the rotating component does not rotate, so that the pressing block presses the cable on the drum, and can force the rotating component to rotate and the main shaft component to move relative to the fixed component when being compressed by an external force, so that the pressing block disengages from the cable.

[0104] In this embodiment, by providing a fixed component, a main shaft component, a rotating component and an elastic component, it is possible to use the elastic component to provide elastic force to the main shaft component when the rotating component does not rotate, so that the pressing block presses the cable on the drum, thereby increasing the contact stress between the cable and the drum and enhancing the friction between the cable and the drum, solving the problems of insufficient friction in the single-drum scheme and low transmission efficiency in the double-drum scheme; and realizing that when the elastic component is compressed by an external force, it forces the rotating component to rotate and the main shaft component to move relative to the fixed component, so that the pressing block disengages from the cable, thus facilitating the recovery of the aerial equipment when it does not do work.

[0105] In an embodiment of the present invention, the fixed component includes a support rod 11 and a first base 12. One end of the support rod 11 is fixed to the side wall of the drum, and the other end is fixed to the first base 12, and the main shaft component can move relative to the first base 12.

[0106] In an embodiment of the present invention, the main shaft component includes a first pressing rod 21, a second pressing rod 22 and a moving rod 23. The moving rod 23 is movably inserted through the first base 12. The first end of the first pressing rod 21 is rotatably connected to the first end of the moving rod 23. The pressing block is arranged at the end of the first pressing rod 21 at the first end. The second end of the first pressing rod 21, the first end of the second pressing rod 22 and the first end of the elastic component are rotatably connected. The second end of the second pressing rod 22 is rotatably connected to the rotating component. The second end of the moving rod 23 is respectively rotatably connected to the first end of the rotating component and the second end of the elastic component.

[0107] In an embodiment of the present invention, the rotating component includes a first rotating rod 31, a second rotating rod 32 and a second base 33. The first end of the first rotating rod 31 is respectively rotatably connected to the second end of the moving rod 23 and the second end of the elastic component. The second end of the first rotating rod 31 is respectively rotatably connected to the second end of the second pressing rod 22 and the first end of the second rotating rod 32. The second end of the second rotating rod 32 is rotatably connected to the first end of the second base 33;

[0108] When the elastic component is compressed by an external force, the second pressing rod 22 moves downward, forcing the first rotating rod 31 and the second rotating rod 32 to rotate downward, and at the same time forcing the moving rod 23 to move relative to the first base 12, thereby driving the pressing block to lift upward and disengage from the cable.

[0109] In an embodiment of the present invention, the elastic component includes an upper cover 41, a lower cover 42, a guide shaft 43, and a spring 44. The guide shaft 43 is fixed between the upper cover 41 and the lower cover 42. The spring 44 is disposed outside the guide shaft 43 and between the upper cover 41 and the lower cover 42. The upper protrusion parts of the upper cover 41 are respectively rotatably connected to the second end of the first pressing rod 21 and the first end of the second pressing rod 22. The lower protrusion parts of the lower cover 42 are respectively rotatably connected to the second end of the moving rod 23 and the first end of the first rotating rod 31.

[0110] In an embodiment of the present invention, a first movable wheel 51 is disposed outside the upper cover 41, and a second movable wheel 52 is disposed at the second end of the second machine base 33. The first movable wheel 51 is used for rolling connection with an external first track 53 to force the compression of the spring 44 under the reaction force of the first track 53. The second movable wheel 52 is used for rolling connection with an external second track 54 to provide a supporting force for the second movable wheel 52.

[0111] In this embodiment, the external force is applied in the form of the reaction force of the track. Thus, when the configurations of the first track 53 and the second track 54 are pre-designed, as the reel rotates, the pressing device can be driven to roll on the first track 53 and the second track 54, so as to effectively and continuously ensure which pressing devices are in the state of pressing the cable and which pressing devices are in the state of disengaging from the cable.

[0112] It can be understood that all the rotational connections in the above solutions can adopt the rotational connection method of bolt pairs, and specific limitations are not made here.

[0113] In an embodiment of the present invention, the horizontal distance required for the pressing block to retreat when disengaging from the cable is respectively related to the angle of downward rotation of the second rotating rod 32 and the length of the second rotating rod 32.

[0114] In an embodiment of the present invention, the horizontal distance required for the pressing block to retreat when disengaging from the cable satisfies the following formula:

[0115] L2 < 2(L1 - L1cosr)

[0116] In the formula, L2 is the horizontal distance required for the pressing block to retreat when disengaging from the cable, L1 is the length of the second rotating rod 32, and r is the angle of downward rotation of the second rotating rod 32.

[0117] In this embodiment, by designing the horizontal distance required for the pressing block to retreat when disengaging from the cable, it can be effectively ensured that the pressing block will not interfere with the subsequent disengagement of the cable when disengaging from the cable.

[0118] It should be noted that the number of pressing devices is multiple (only one pressing device is shown in Figure 7 while Figure 1 and Figure 2A plurality of pressing devices are shown, except that Figure 1 and Figure 2 the pressing devices in

[0119] It should be noted that in the present invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0120] Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for enhancing the friction force of a single drum in high-altitude wind power, characterized in that, Including: When obtaining high-altitude wind energy, a pressing device is used to press the cable wound around a single drum to increase the contact stress between the cable and the drum, thereby enhancing the friction between the cable and the drum; wherein, the pressing device is connected to the drum.

2. The enhancement method according to claim 1, wherein A pressing block is provided at the end of each pressing device, and the pressing parameters of the pressing device include the number of pressing blocks, the arc length of the pressing blocks, and the pressing force of the pressing blocks. The use of the pressing device to press the cable wound around a single drum includes: Optimizing the pressing parameters; Using the pressing device to press the cable wound around a single drum according to the optimized pressing parameters.

3. The enhancement method according to claim 2, wherein The optimization of the pressing parameters includes: Based on the initial tension of the tight side of the cable for high-altitude wind power, determining the cable diameter and the minimum drum radius; Based on the minimum drum radius and the initial tension of the tight side, determining the maximum specific line pressure density load that the cable can withstand; Selecting the target number of pressing blocks within the preset limit range of the number of pressing blocks; Selecting a target drum radius greater than the minimum drum radius; S1. Based on the target drum radius and the target number of pressing blocks, determining the target arc length of the pressing blocks; S2. Based on the target number of pressing blocks and the preset winding wrap angle of the cable, determining the minimum number of working pressing blocks; S3. Based on the actual tension of the tight side and the actual tension of the loose side of the cable in the natural winding state, the wrap angle, the equivalent friction coefficient between the cable and the drum, the minimum number of working pressing blocks, and the wrap angle between each pressing block, determining the target pressing force of the pressing blocks; S4. Based on the target pressing force of the pressing blocks and the target arc length of the pressing blocks, determining the actual specific line pressure density load for applying the pressing force of the pressing blocks; S5. Based on the maximum specific line pressure density load that the cable can withstand, the actual tension of the tight side, and the target drum radius, determining the additional specific line pressure density load that the cable can withstand when the drum radius is the target drum radius; S6. Based on the actual specific line pressure density load for applying the pressing force of the pressing blocks and the additional specific line pressure density load that the cable can withstand, determining whether the selection of the target drum radius is appropriate; If it is appropriate, taking the current target number of pressing blocks, the target arc length of the pressing blocks, and the target pressing force of the pressing blocks as the optimized results; If it is not appropriate, continue to increase the target drum radius and loop through steps S1 - S6 until it is determined that the selection of the target drum radius is appropriate, and taking the current target number of pressing blocks, the target arc length of the pressing blocks, and the target pressing force of the pressing blocks as the optimized results.

4. The enhancement method according to claim 3, wherein The cable diameter is determined according to the cable breaking force requirement, and the cable breaking force requirement is: F 破 ≥ ηF0 Where F 破 is the breaking force of the cable, η is the preset safety factor, and F0 is the initial tension of the tight side; The minimum drum radius is 10 times the cable diameter; The preset limit range is 24 - 52.

5. The enhancement method according to claim 4, wherein The maximum specific line pressure density load that the cable can withstand is determined by the following formula: P ρmax = F0 / R min = F0 / (10d) Wherein, P ρmax is the maximum specific pressure density load that the cable can withstand, R min is the minimum drum radius, and d is the cable diameter.

6. The enhancement method according to claim 5, characterized in that The target arc length of the pressing blocks is determined by the following formula: L = 2βπR / N In the formula, L is the target arc length of the pressing blocks, β is the clearance coefficient, the clearance coefficient is the percentage of the total arc length of the pressing blocks to the circumference of the drum, R is the target drum radius, and N is the target number of pressing blocks.

7. The enhancement method according to claim 6, wherein The minimum number of working pressing blocks is determined by the following formula: where n min is the minimum number of working compaction blocks, floor() is the floor function, and α is the winding wrap angle.

8. The enhancement method according to claim 7, characterized in that The target bale pressure is determined by the following formula: In the formula, P is the target bale pressure, F2 is the actual tight side tension, F1 is the actual slack side tension, f is the equivalent friction coefficient, i is the i-th bale, and Δθ is the wrap angle between each bale.

9. The enhancement method according to claim 8, wherein The actual specific line pressure density load is determined by the following formula: P ρ = P / L Wherein, P ρ is the actual specific pressure line density load.

10. The enhancement method according to claim 9, wherein The allowable additional specific line pressure density load that the cable can withstand is determined by the following formula: P ρ ' = P ρmax - F2 / R Wherein, P ρ ' is the allowable external specific pressure line density load that the cable can withstand; P ρ ≤P ρ ', indicating that the selected target drum radius is appropriate; P ρ >P ρ ', indicating that the selected target drum radius is inappropriate.

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