Multi-roller energy distribution and collection device for high-altitude wind power

Abstract

The invention relates to the technical field of high-altitude wind power, in particular to a multi-roller energy dividing and converging device for high-altitude wind power. The device comprises m rollers, m intermediate shafts, m planetary gears, a sun gear and a transmission shaft, each roller is connected with one planetary gear through one intermediate shaft, the m planetary gears are meshed with one sun gear, one end of the transmission shaft is connected with the sun gear, and the other end of the transmission shaft is connected with an external generator. Each roller is used for winding a high-altitude wind power cable, a turn of cable is wound on at least part of the rollers, one end of the cable is connected with an umbrella set of the high-altitude wind power, and the other end of the cable is connected with an external fixing assembly, so that the cable can drive the rollers to rotate under the driving of the umbrella set; and the number of the rollers which wind the cable and can drive the planetary gears to rotate is not less than three. According to the technical scheme, the load transmission capacity can be improved, the energy transmission efficiency can be improved, and therefore the stability and safety of the cable in the energy transmission process are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of high-altitude wind power generation, and in particular to a multi-roller energy distribution device for high-altitude wind power generation. Background Art

[0002] In the working device of high-altitude wind power, the drum is a common device for collecting cables. The traditional drum structure adopts a single-drum structure or a double-drum structure. However, due to the small envelope angle of the traditional drum structure, multiple turns need to be wound on the drum structure to improve the load transfer capacity. However, this method will reduce the energy transfer efficiency due to the increase in the number of turns. Therefore, it is urgently needed to provide a multi-drum energy distribution device for high-altitude wind power to solve the above technical problems. Summary of the invention

[0003] The embodiment of the present invention provides a multi-roller energy distribution device for high-altitude wind power, which can improve the load transfer capacity and energy transfer efficiency at the same time.

[0004] An embodiment of the present invention provides a multi-drum energy splitting device for high-altitude wind power, comprising m drums, m intermediate shafts, m planetary gears, a sun gear and a transmission shaft, each of the drums is connected to one of the planetary gears via one of the intermediate shafts, the m planetary gears are meshed with one of the sun gears, one end of the transmission shaft is connected to the sun gear, and the other end is connected to an external generator, each of the drums is used to wind a cable of high-altitude wind power, at least a turn of cable is wound around a portion of the drums, one end of the cable is connected to an umbrella group of the high-altitude wind power, and the other end is connected to an external fixed component, so that the cable can drive the drum to rotate under the drive of the umbrella group, and the number of the drums that are wound with cables and can drive the planetary gears to rotate is not less than three.

[0005] Compared with the related art, the present invention has at least the following beneficial effects:

[0006] According to the multi-roller energy splitter for high-altitude wind power provided by the embodiment of the present invention, the envelope angle of the cable is increased by increasing the number of rollers, while limiting the number of turns of the cable to one turn. This can not only improve the load transfer capacity, but also improve the energy transfer efficiency, thereby ensuring the stability and safety of the cable during energy transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 A schematic diagram of a structure of a multi-drum energy distribution device for high-altitude wind power provided by an embodiment of the present invention;

[0009] Figure 2 Another structural schematic diagram of a multi-drum energy distribution device for high-altitude wind power provided by an embodiment of the present invention;

[0010] Figure 3 A schematic diagram of a cable winding method of a multi-roller energy distribution device for high-altitude wind power provided by an embodiment of the present invention;

[0011] Figure 4 Schematic diagram of a cable winding method for a traditional double-drum structure.

[0012] Reference numerals:

[0013] 10-cable; 1-drum; 2-intermediate shaft; 3-planetary gear; 4-sun gear; 5-transmission shaft; 6-clutch; 11-groove. DETAILED DESCRIPTION

[0014] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 The embodiment of the present invention provides a multi-drum energy distribution device for high-altitude wind power, including m drums 1, m intermediate shafts 2, m planetary gears 3, a sun gear 4 and a transmission shaft 5, each drum 1 is connected to a planetary gear 3 through an intermediate shaft 2, and the m planetary gears 3 are meshed with a sun gear 4. One end of the transmission shaft 5 is connected to the sun gear 4, and the other end is connected to an external generator (not shown in the figure). Each drum 1 is used to wind a cable 10 of high-altitude wind power, and at least a turn of cable 10 is wound around a part of the drums 1. One end of the cable 10 is connected to an umbrella group (not shown in the figure) of the high-altitude wind power, and the other end is connected to an external fixed component (not shown in the figure), so that the cable 10 can drive the drum 1 to rotate under the drive of the umbrella group, and the number of drums 1 wound with the cable 10 and capable of driving the planetary gear 3 to rotate is not less than three.

[0016] In this embodiment, the envelope angle of the cable is increased by increasing the number of rollers, while the number of turns of the cable is limited to one turn. This can not only improve the load transfer capacity, but also improve the energy transfer efficiency, thereby ensuring the stability and safety of the cable during energy transmission.

[0017] It can be known that the ultra-high power multi-drum energy distribution device suitable for ultra-large loads provided by the present invention is used to convert the linear motion energy of high-altitude ultra-long cables into rotational motion energy, and the cables are wound on multiple drums to achieve energy "diversion", and then the multi-drum energy is "gathered" in the form of a planetary gear train transmission, thus achieving energy distribution. The cable is wound on the drum, and its tension comes from the high-altitude parachute ladder equipment (i.e., the parachute group) at one end of the cable. By driving the drum to rotate, the planetary gear train is driven to rotate, thereby driving the external generator to operate, and realizing energy conversion. Compared with the double-drum structure, this structure greatly increases the envelope angle, thereby greatly improving the load transfer capacity and energy transfer efficiency.

[0018] At the same time, this structure can reduce the bending and torsional loads of the transmission shaft and the corresponding bearings, reduce the size of the roller, connecting shaft and bearings, greatly reduce the production cost and installation difficulty of super-standard parts, and extend the service life of the structure.

[0019] like Figure 2 As shown, in one embodiment of the present invention, each drum 1 is provided with a groove 11 , and the cable 10 is wound around the drum 1 through the groove 11 .

[0020] In this embodiment, the groove 11 is provided so that the cable 10 can be stably wound on the drum 1 .

[0021] Meanwhile, assuming that multiple turns of the cable 10 can be wound around the drum 1, the grooves 11 can be used to achieve mutual avoidance of the cables 10 to prevent the cables of different turns from interfering with each other.

[0022] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, each roller 1 is cylindrical.

[0023] like Figures 1 to 3 As shown, in one embodiment of the present invention, m is equal to 5.

[0024] In this embodiment, through theoretical calculations and simulation calculations by the inventors, when the number of rollers 1 is 5, the load transfer capacity and energy transfer efficiency are the highest.

[0025] like Figure 3 As shown, in one embodiment of the present invention, all rollers 1 are arranged in a five-pointed star shape. Of course, other arrangements are also possible, which are not specifically limited here.

[0026] like Figure 3 As shown, in one embodiment of the present invention, the envelope angle of each roller 1 is 144°, and the total envelope angle of all rollers 1 is 720°.

[0027] In one embodiment of the present invention, the sun gear 4 and the transmission shaft 5, the planetary gears and the intermediate shaft 2, and the drum 1 and the intermediate shaft 2 are all connected via keys.

[0028] like Figure 2 As shown, in one embodiment of the present invention, each intermediate shaft 2 is provided with a clutch 6, and the clutch 6 is used to connect or disconnect the drum 1 with the planetary gear 3;

[0029] When the clutch 6 is in a state of connecting the drum 1 with the planetary gear 3, the drum 1 can drive the planetary gear 3 to rotate, otherwise it cannot drive the planetary gear 3 to rotate (that is, the drum 1 just idles at this time).

[0030] In this embodiment, the structure can realize multiple modes of cable winding drums. When faced with huge differences in wind speeds in different seasons, the clutch of the intermediate shaft can scientifically adjust the number of drums involved in the work, thereby reducing useless power loss and improving economic benefits.

[0031] In one embodiment of the present invention, the state of the clutch 6 is related to the change in tension of the cable 10 before and after passing through the drum 1 and the energy transmission efficiency.

[0032] In some embodiments, the clutch is a claw clutch, which is composed of a sliding sleeve and two sets of rotating parts of teeth against teeth. The sliding sleeve can drive the roller side rotating component to disengage and reconnect as needed, so that the gear side rotating component loses the power source or regains power. In addition, the specific type of the clutch 6 is not specifically limited in the embodiment of the present invention.

[0033] In one embodiment of the present invention, the change in tension of the cable 10 before and after passing through the drum 1 is calculated by the following formula:

[0034]

[0035] Wherein, △Q is the change in tension of the cable 10 before and after passing through the drum 1, Q1 is the tension of the cable 10 before entering the drum 1, d0 is the diameter of the cable 10, v is the axial speed of the cable 10, θ is the total envelope angle of all drums 1, and f is the equivalent friction coefficient between the cable 10 and the drum 1. The equivalent friction coefficient is a variable related to the winding mode of the cable 10 and the tension of the cable 10;

[0036] The energy transfer efficiency is calculated by the following formula:

[0037]

[0038] Wherein, η is the energy transfer efficiency, n is the rotation speed of the drum 1, and r is the radius of the cross-sectional area of ​​the drum 1.

[0039] like Figure 3 As shown, when the mechanism uses five rollers to participate in the work, Figure 3 In the winding method shown, the cable enters the drum system from the left side of drum No. 1 and is wound in the direction indicated by the arrow. In this method, the single-turn envelope angle of a single drum is 144°, and the total envelope angle of a single turn is 720°. According to the above formula, the initial wind force is taken as 1000kN (i.e., the tension of the cable before entering the drum), the equivalent friction coefficient is taken as 0.2, and the cable is wound in the order of drum No. 2-drum No. 3-drum No. 4-drum No. 5-drum No. 1. The total envelope angle of the first turn is 720°, the total tension change is 918.9kN, and the residual tension at the end of the cable is 81.1kN. The total envelope angle of the second turn is 1440°, the total tension change is 993.4kN, and the residual tension at the end of the cable is 6.6kN. It can be seen that the winding method of five drums can basically achieve the recovery of the initial wind force by winding one turn, thereby greatly improving the load transfer capacity and energy transfer efficiency.

[0040] like Figure 4 As shown, the traditional double-drum structure is selected. Under the same initial wind force and friction coefficient conditions, the first turn envelope angle is 360°, the total tension change is 715.2kN, and the residual tension at the cable tail end is 284.8kN. The total envelope angle of the second turn is 720°, the total tension change is 918.9kN, and the residual tension at the cable tail end is 81.1kN. Therefore, compared with the traditional single-drum structure or double-drum structure, the multi-drum structure provided by the present invention can simultaneously improve the load transfer capacity and energy transfer efficiency (since winding multiple turns will inevitably cause more energy loss than winding one turn, so one turn is selected for winding).

[0041] Therefore, the mechanism can flexibly select the number of working rollers according to the initial wind force of the season, and the clutch disconnects the number of working rollers as needed. When the initial wind force is relatively small at 500kN, the mechanism selects one roller to work, the change in tension is 197.4kN, and the residual tension at the tail end of the cable is 302.6kN. The change in tension when two rollers are selected is 316.9kN, and the residual tension at the tail end of the cable is 183.1kN. The change in tension when three rollers are selected is 389.2kN, and the residual tension at the tail end of the cable is 110.8kN. The change in tension when four rollers are selected is 432kN, and the residual tension at the tail end of the cable is 68kN. Therefore, when four rollers are selected for work, the residual tension at the tail end is less than that in the case of five rollers, which can meet the requirement that the residual tension at the tail end is small enough, thereby improving the overall service life of the mechanism.

[0042] It should be noted that, in this article, 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical factors in the process, method, article or equipment including the elements.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention, which 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 multi-drum energy distribution device for high-altitude wind power, characterized in that: It comprises m rollers, m intermediate shafts, m planetary gears, a sun gear and a transmission shaft, each of the rollers is connected to a planetary gear via an intermediate shaft, the m planetary gears are meshed with a sun gear, one end of the transmission shaft is connected to the sun gear, and the other end is connected to an external generator, each roller is used to wind a cable of high-altitude wind power, at least a turn of cable is wound around a portion of the rollers, one end of the cable is connected to a parachute assembly of high-altitude wind power, and the other end is connected to an external fixed component, so that the cable can drive the roller to rotate under the drive of the parachute assembly, and the number of the rollers wound with cables and capable of driving the planetary gears to rotate is not less than three.

2. The multi-roller energy distribution device according to claim 1, characterized in that: Each of the drums is provided with a groove, and the cable is wound around the drum through the groove.

3. The multi-roller energy distribution device according to claim 1, characterized in that: Each of the rollers is in a cylindrical shape.

4. The multi-roller energy distribution device according to claim 1, characterized in that: m is equal to 5.

5. The multi-roller energy distribution device according to claim 4, characterized in that: All the rollers are arranged in a five-pointed star shape.

6. The multi-roller energy distribution device according to claim 5, characterized in that: The envelope angle of each of the rollers is 144°, and the total envelope angle of all the rollers is 720°.

7. The multi-roller energy distribution device according to claim 1, characterized in that: The sun gear and the transmission shaft, the planetary gear and the intermediate shaft, and the roller and the intermediate shaft are all connected via keys.

8. The multi-roller energy distribution device according to any one of claims 1 to 7, characterized in that: Each intermediate shaft is provided with a clutch, and the clutch is used to connect or disconnect the drum with the planetary gear; When the clutch is in a state of connecting the roller with the planetary gear, the roller can drive the planetary gear to rotate, otherwise, the roller cannot drive the planetary gear to rotate.

9. The multi-roller energy distribution device according to claim 8, characterized in that: The state of the clutch is related to the change in cable tension before and after the drum and the energy transmission efficiency.

10. The multi-roller energy distribution device according to claim 9, characterized in that: The change in cable tension before and after the drum is calculated using the following formula: In the formula, △Q is the change in cable tension before and after the drum, Q1 is the tension of the cable before it enters the drum, d0 is the diameter of the cable, v is the axial velocity of the cable, θ is the total envelope angle of all drums, and f is the equivalent friction coefficient between the cable and the drum. The equivalent friction coefficient is a variable related to the winding method of the cable and the tension of the cable. The energy transfer efficiency is calculated by the following formula: Wherein, η is the energy transfer efficiency, n is the rotation speed of the drum, and r is the radius of the cross-sectional area of ​​the drum.

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