A mooring cable winch for a moored balloon

Abstract

The present invention discloses a mooring cable winch for a mooring balloon, which includes two drums for winding and driving the mooring cable, two power driving devices, and a transmission device for driving the two groups of drums. The power driving device can drive the drums to rotate. The mooring cable winch of the present invention can be used for mooring cables with small loads to large loads, has strong adaptability, and is more suitable for use conditions with large bearing loads. Applying this invention patent can bring substantial profits only in this regard, and it does not include the potential value generated by reducing mooring cable damage and system operation risks, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of moored balloons, and particularly relates to a mooring cable winch for moored balloons. Background Art

[0002] A moored balloon belongs to a kind of aerostat. It is an aerostat that uses a lighter-than-air lifting gas to fill the inside of the balloon envelope and relies on a mooring cable to work. Moored balloons have been widely used in various fields such as high-altitude surveillance, meteorological detection, mobile communication, and advertising.

[0003] Currently, the winch for mooring cable retraction of moored balloons usually includes a box body, a driving device, a driving shaft, a drum, etc. The drum usually includes a plurality of rope grooves matching the diameter of the mooring cable. During operation, the motor drives the drum to rotate, and the drum and the mooring cable are driven by flexible friction transmission, so as to drive the mooring cable and the drum to rotate together, realizing the continuous winding and retraction of the mooring cable.

[0004] Generally, the drum is integrally processed and the diameters of all rope grooves are the same, and the rotational speed of each rope groove is the same. In an ideal state, the cable linear velocity of each rope groove is the same and consistent with the rope groove. However, in reality, due to flexible friction transmission and the elastic deformation of the cable, the motion situation is often very complex. According to the flexible friction transmission theory of belt drive, the tension transmitted by the belt is related to the friction wrap angle and the friction coefficient, and shows a logarithmic exponential relationship. For a drum with multiple rope grooves, the tension at the inlet and outlet ends of the cable on each rope groove also changes exponentially, with a large gap. The mooring cable usually consists of a rubber surface layer, a lightning protection layer, a Kevlar layer, a cable, an optical fiber, and a filler, etc. Here are briefly described three situations that often occur during the retraction and release of the mooring cable on the drum:

[0005] 1) Mooring cable damage: When the load of the mooring cable is too large, exceeding the limit of flexible friction transmission, the cable will slip as a whole on the rope groove of the drum, resulting in severe wear, cable damage, and other uncontrollable load impacts.

[0006] 2) Mooring cable delamination: When the friction between the cable and the rope groove is greater than the friction between the cable surface layer and the lightning protection layer or between the lightning protection layer and the Kevlar layer, the surface layer of the mooring cable will delaminate from the lightning protection layer or the Kevlar layer, resulting in damage phenomena such as wrinkling, necking, and tearing of the mooring cable surface layer.

[0007] 3) Mooring rope slippage: Since multi-rope groove drums are usually rigid bodies with equal diameters, the linear speed of each rope groove is the same, but the mooring rope tension on each rope groove is inconsistent, and its elastic elongation deformation will also be inconsistent. During the rope retraction and release movement, the rope will inevitably slip locally on the rope groove, especially on the initial few turns of the rope groove when the heavy-load end of the mooring rope just enters the winch drum. In severe cases, the slippage sound can be clearly heard. Frequent local slippage of the rope on the rope groove will also accelerate the wear of the mooring rope and reduce the service life of the rope.

[0008] At present, there is only one relevant patent in China, "A cable winch drum for launching and recovering tethered balloons (CN104591020A)". This device mainly adopts a simple friction ring on the rope groove of the drum to solve the problem of slipping by adjusting the friction coefficient of the friction ring. However, this solution has a simple structure and is not ideal in terms of friction adjustment, installation and use effect. Summary of the invention

[0009] Purpose of the Invention

[0010] In view of the limitations of load conditions in the use of existing tethered balloon cable retracting winches, the present invention provides a tethered balloon cable retracting winch, and provides a new wheel groove design structure. The inner and outer ring split wheel groove structure cooperates with the spring device to act in time according to the real-time load conditions, and can solve the common problems of the tethered cable during the winch drum retracting and releasing process. The number of wheel grooves, wheel groove diameter and drive mode of the winch can be adjusted according to actual usage conditions. The operation is convenient and fast, and the adaptability is good. The winch can optimize and adjust the load size transmitted by the tethered cable in each wheel groove, so that the tethered cable and the drum wheel groove reach the best matching state, which can better protect the tethered cable and extend the service life of the tethered cable.

[0011] Inventing technical solutions

[0012] A mooring cable retracting and releasing winch for a moored balloon comprises two drums for winding and driving the mooring cables, two power drive devices, and a transmission device for driving two groups of drums. The power drive device can drive the drums to rotate.

[0013] Preferably, the reel comprises a plurality of wheel grooves, and the wheel grooves are detachably connected to the drive shaft.

[0014] Preferably, the wheel groove includes an outer ring and an inner ring, the inner ring of the wheel groove is connected to the drive shaft, and the outer ring of the wheel groove and the inner ring of the wheel groove are meshed with each other through a tapered pin; the spring is arranged on the tapered pin, and the outer ring of the wheel groove compresses the spring through the tapered pin, and when the load transmitted on the outer ring of the wheel groove is too large and greater than the preset load of the spring, the tapered pin and the spring will be pressed into the inner ring of the wheel groove together, and at this time the outer ring of the wheel groove and the inner ring of the wheel groove will rotate relative to each other; when the load transmitted on the outer ring of the wheel groove is less than the preset load of the spring, the tapered pin returns to the meshing position of the outer ring of the wheel groove and the inner ring of the wheel groove under the elastic force of the spring, and the outer ring of the wheel groove and the inner ring of the wheel groove do not rotate relative to each other.

[0015] Preferably, the inner ring of the wheel groove is connected to the drive shaft via a key.

[0016] Preferably, a groove for installing a tapered pin is radially opened on the side of the inner ring of the wheel groove, a hole is provided on the outer circumferential surface of the inner ring of the wheel groove for the end of the tapered pin to extend out, and a groove is provided on the outer ring of the wheel groove corresponding to the hole and matching the profile of the end of the tapered pin.

[0017] Preferably, tapered pins are evenly distributed along the circumferential direction on the inner ring of the wheel groove.

[0018] Preferably, the load that can be transmitted between a single wheel groove inner ring and a wheel groove outer ring is calculated according to the Euler formula of flexible friction transmission, the wrap angle takes the value of π, and the friction coefficient takes the smaller value of the relative friction coefficient between the mooring cable and the wheel groove and the friction coefficient between the layers of the mooring cable.

[0019] Preferably, a baffle is installed in the groove for installing the cone pin to block the opening of the groove.

[0020] Preferably, the reel and the power drive device are both arranged on the carrying box.

[0021] Preferably, the two groups of reels can adjust the reel center distance according to the installation space or be arranged at a certain interval in the axial direction.

[0022] Advantages of the present invention:

[0023] The application of the winch of the patent of the present invention can greatly increase the service life of the mooring cable. According to the service life of the mooring cable for moored balloons in the current domestic industry (about 400 times of lifting / lowering), it is conservatively estimated that the service life can be increased by 25%. According to the different carrying capacity and transmission functions, the price of a single mooring cable in China usually ranges from hundreds of thousands to millions, and the greater the load, the higher the price. The mooring cable of the present invention can be used for mooring cables with loads from small to large, has strong adaptability, and is more suitable for use conditions with large loads. The application of the patent of the present invention can make a substantial profit from this alone, and does not include the potential value generated by reducing the damage to the mooring cable and the risk of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 , Figure 2This is a schematic structural diagram of a mooring cable winch for a moored balloon of the present invention.

[0025] Figure 3 This is a schematic structural diagram of the winch drum.

[0026] Figure 4 This is a schematic diagram of a single wheel groove.

[0027] Figure 5 This is Figure 4 the A-A sectional view of

[0028] In the figure: 1 is the bearing box body, 2 is the drum, 3 is the mooring cable, 4 is the power drive device, 5 is the transmission device, 21 is the wheel groove, 22 is the drive shaft, 23 is the key, 211 is the outer ring of the wheel groove, 212 is the inner ring of the wheel groove, 213 is the taper pin, 214 is the spring, and 215 is the spring adjustment device. Specific embodiments

[0029] The present invention is realized through the following technical solutions.

[0030] A mooring cable winch for a moored balloon includes a bearing box body 1 for support, two drums 2 for winding and driving the mooring cable, two power drive devices 4, and a transmission device 5 for driving the two drums, such as a gear set or a synchronous belt.

[0031] The dual power drive devices 4 are backup to each other, can work independently or cooperatively, and can also switch the rotation direction of the drum according to the actual use situation. The two drums 2 are driven by the transmission device 5. This form can make both drums serve as drive drums, independently or multiply increase the wrap angle value in the flexible friction drive according to needs, effectively reduce the load transmitted by a single wheel groove, that is, under the same load, reduce the friction coefficient between the mooring cable 3 and the wheel groove 21, and correspondingly reduce the interfacial friction force between the surface layer and the lightning protection layer of the mooring cable and between the lightning protection layer and the Kevlar layer, thereby improving the process performance and reducing the processing cost of the mooring cable.

[0032] See Figure 2 As shown, each drum 2 is composed of a plurality of independently detachable and installable wheel grooves 21. The number of installed wheel grooves can be determined according to actual needs. The two drums 2 can adjust the center distance of the drums or be arranged at a certain interval in the axial direction according to the installation space, so as to realize the spiral winding of the mooring cable 3 on the wheel grooves of the two drums 2 without interference during operation.

[0033] The reel 2 has multiple independent wheel grooves 21. Each single independent wheel groove 21 is sequentially installed on the drive shaft 22, and load transfer is carried out through the key 23. The diameter of the wheel groove and the number of wheel grooves are set according to the load size. Considering the slack of the mooring cable, load fluctuation, and running stability, the number of wheel grooves is generally set to 5 or more. The diameters of the wheel grooves 21 on the same group of reels can also be adjusted according to the actual situation. Usually, starting from the high-load end to the low-load end, it gradually decreases according to the size of the mooring cable load transmitted. The reduction amount depends on the size of the transmitted load and the elastic characteristics of the mooring cable 3 wires, which is used to solve the problem of inconsistent elastic deformation caused by different loads of the mooring cable 3 on each wheel groove 21, resulting in local slip and wear of the mooring cable 3.

[0034] See Figure 3 As shown, the reel wheel groove 21 adopted by the present invention is composed of a wheel groove outer ring 211 and a wheel groove inner ring 212. The wheel groove inner ring 212 is connected to the drive shaft 22 through the key 23. The wheel groove outer ring 211 and the wheel groove inner ring 212 are meshed and connected through the taper pin 213. The size of the load transmitted between the wheel groove outer ring 211 and the wheel groove inner ring 212 is adjusted and controlled through the spring 214. The wheel groove outer ring 211 compresses the spring 214 through the taper pin 213. When the load transmitted on the wheel groove outer ring 211 is too large, greater than the preset load of the spring 214, the taper pin 213 and the spring 214 will be pressed into the wheel groove inner ring 212 together. At this time, relative rotation will occur between the wheel groove outer ring 211 and the wheel groove inner ring 212, thus avoiding the situation that the mooring cable 3 slips integrally on the wheel groove 21 under the large-load state, resulting in severe wear and damage. When the load transmitted on the wheel groove outer ring 211 decreases, less than the preset load of the spring 214, the taper pin 213 returns to the meshing position between the wheel groove outer ring 211 and the wheel groove inner ring 212 under the elastic force of the spring 214. The wheel groove outer ring 211 and the wheel groove inner ring 212 will no longer have relative rotation under the state where the spring device provides elastic force, thus restoring normal load transfer.

[0035] See Figure 3 As shown, for the taper pin 213 and the spring 214 used for load transfer between the wheel groove outer ring 211 and the wheel groove inner ring 212 of the present invention, their quantity, the size of the taper pin 213, and the stiffness characteristics of the spring 214 can all be set according to the size of the transmitted load. The load that can be transmitted by a single wheel groove inner ring 211 and wheel groove outer ring 212 can be calculated according to the Euler formula of flexible friction drive. The included angle is taken as π value, and the friction coefficient should take the smaller value of the relative friction coefficient between the mooring cable 3 and the wheel groove 21 and the friction coefficient between each layer of the mooring cable 3, so as to avoid the overall slip of the mooring cable 3 on the wheel groove 21 and the wrinkling, necking, peeling and other damages caused by delamination between each layer of the mooring cable 3. The taper pin 213 and the spring 214 are restricted by the baffle 216, which is convenient for disassembly, replacement and adjustment at the same time. The spring adjustment device 215 can finely adjust the range of the spring compression stroke to adapt to the actual use environment.

[0036] According to the load size of the actual product, the characteristics of the mooring cable, etc., the present invention optimizes the running state of the mooring cable 3 on the drum 2 by adjusting a series of measures such as the driving device 4, the number and diameter of the wheel grooves 21 of the winch, the size of the taper pin 213, the physical characteristics of the spring 214, and the number of the taper pin 213 and the spring 214, which can completely avoid the overall slipping of the mooring cable on the rope groove, the wrinkling or delamination of the mooring cable skin under large load conditions, and greatly reduce the occurrence of common problems such as the local slipping of the mooring cable on the rope groove, thereby effectively improving the safety of the mooring cable retraction and the service life of the mooring cable.

[0037] The protection scope of the present invention is not limited to the above embodiments. Obviously, those skilled in the art can make various changes and deformations to the present invention without departing from the scope of the present invention. If these changes and deformations fall within the scope of the claims of the present invention and its equivalent technologies, the intention of the present invention also includes these changes and deformations.

Claims

1. A mooring cable winch for a moored balloon, characterized in that, It comprises two drums for winding and driving mooring cables, two power drive devices, and a transmission device for driving two groups of drums, and the power drive device can drive the drums to rotate; the drum comprises a plurality of wheel grooves, and the wheel grooves are detachably connected to the driving shaft; the wheel grooves comprise an outer wheel groove ring and an inner wheel groove ring, and the inner wheel groove ring is connected to the driving shaft, and the outer wheel groove ring and the inner wheel groove ring are meshed with each other through a tapered pin; a spring is arranged on the tapered pin, and the outer wheel groove ring compresses the spring through the tapered pin, and when the load transmitted on the outer wheel groove ring is too large and greater than the preset load of the spring, the tapered pin and the spring will be pressed into the inner wheel groove ring together, and at this time, the outer wheel groove ring and the inner wheel groove ring will rotate relative to each other; when the load transmitted on the outer wheel groove ring is less than the preset load of the spring, the tapered pin returns to the meshing position of the outer wheel groove ring and the inner wheel groove ring under the elastic force of the spring, and the outer wheel groove ring and the inner wheel groove ring do not rotate relative to each other; A groove for installing a tapered pin is radially provided on the side of the inner ring of the wheel groove, a hole for the end of the tapered pin to extend out is provided on the outer circumferential surface of the inner ring of the wheel groove, and a groove matching the profile of the end of the tapered pin is provided at a position corresponding to the hole on the outer ring of the wheel groove.

2. The mooring cable winch for a moored balloon according to claim 1, characterized in that, The inner ring of the wheel groove is connected to the drive shaft through a key.

3. The mooring cable winch for a moored balloon according to claim 1, characterized in that, Taper pins are evenly distributed along the circumference of the inner ring of the wheel groove.

4. The mooring cable winch for a moored balloon according to claim 1, characterized in that, The load that can be transmitted between a single wheel groove inner ring and a wheel groove outer ring is calculated according to the Euler formula of flexible friction transmission. The wrap angle is taken as π, and the friction coefficient is taken as the smaller value of the relative friction coefficient between the mooring cable and the wheel groove and the friction coefficient between the layers of the mooring cable.

5. The mooring cable winch for a moored balloon according to claim 1, characterized in that, A baffle is installed in the groove for installing the taper pin to block the opening of the groove.

6. The mooring cable winch for a moored balloon according to claim 1, characterized in that, The reel and the power driving device are both arranged on the bearing box.

7. The mooring cable winch for a moored balloon according to claim 1, characterized in that, The two groups of reels can adjust the reel center distance according to the installation space or be arranged at a certain distance in the axial direction.

Images