CN108726406B - Gravity tensioning device - Google Patents
Gravity tensioning device Download PDFInfo
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- CN108726406B CN108726406B CN201810772218.7A CN201810772218A CN108726406B CN 108726406 B CN108726406 B CN 108726406B CN 201810772218 A CN201810772218 A CN 201810772218A CN 108726406 B CN108726406 B CN 108726406B
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- 230000005484 gravity Effects 0.000 title claims abstract description 31
- 238000004804 winding Methods 0.000 claims description 34
- 238000012163 sequencing technique Methods 0.000 claims description 10
- 238000010248 power generation Methods 0.000 abstract description 18
- 230000003139 buffering effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the field of high-altitude wind power generation, and particularly discloses a gravity tensioning device, which also comprises a plurality of fixed pulley blocks which are fixed on the upper part of a rack and are arranged in parallel, wherein each fixed pulley block comprises a first fixed shaft which is arranged on the rack, and a plurality of fixed pulleys are arranged on each first fixed shaft; the device also comprises a plurality of movable pulleys arranged at the lower part of the frame, wherein the movable pulleys are in one-to-one correspondence with the fixed pulleys; the movable pulley is also connected with a counterweight, and the whole counterweight is in a trend of light front and heavy back. Compared with the prior art, the gravity tensioning device provided by the invention is a rope containing device with a rope buffering function, has large buffering capacity, has small friction loss on a rope and is beneficial to prolonging the service life of the rope.
Description
Technical Field
The invention relates to the field of high-altitude wind power generation, in particular to a gravity tensioning device.
Background
Wind energy is a clean renewable energy source, and the wind energy stored in the high air exceeds 100 times of the total energy required by the human society. The high altitude wind energy has the characteristics of high wind speed, high average energy density, wide regional distribution, high stability, continuous year after year and the like. How to fully utilize the high-altitude wind energy is a hot topic which is always focused by scientific researchers for human use, and the advantages of the high-altitude wind energy are also more and more paid attention to all countries of the world.
The utilization of high altitude wind energy is to collect wind energy in the high altitude, convert the wind energy into mechanical energy, and finally convert the mechanical energy into electric energy or other forms of energy. The existing modes for generating power by using high-altitude wind energy mainly comprise two modes: one is to suspend the generator in the air; the other is to place the generator on the ground. The power generation system with the generator suspended at high altitude cannot realize good control and large power generation in the air part due to the problems that the weight and the volume of the air system cannot be too large and the like; the generator is arranged on the ground, so that the problems can be solved.
The ground power generation system generally includes a power hoist for winding up a rope of an umbrella-type wind power device (the power hoist is directly driven by the umbrella-type wind power device), and the rope is wound up and stored on a Rong Shengjuan hoist after passing through the power hoist. In the actual use process, the cable is periodically wound and unwound, so that the phenomenon of asynchronous winding between the power winding machine and the rope containing winding machine is easy to occur, the cable can be in a loose or tight state between the two winding machines, and the damage of the two states to the cable is very large and is not allowed to occur in the actual use. To solve this problem, the invention of application number 201610800547.9 provides a cable buffer mechanism between a power hoist and a rope-containing hoist, wherein the cable buffer mechanism comprises a plurality of groups of fixed pulleys and movable pulleys which are alternately distributed, the cables are wound on the fixed pulleys one by one, and an elastic device for providing tension for the cables is arranged on the movable pulleys. However, this solution increases the complexity of the ground power generation system by adding a cable buffer device, makes the structure of the entire ground power generation system tedious, increases the floor area of the ground power generation system, and increases great difficulty in reasonably arranging the various parts of the ground power generation system. Meanwhile, the pulley blocks of the cable buffer device are arranged side by side, the buffer capacity is relatively small, and if the buffer capacity is required to be increased, the device needs to be transversely expanded, so that the occupied area of the device is further increased, and the distribution difficulty is further increased. In addition, the cable buffer mechanism mainly realizes the function through the movable pulley and the elastic device arranged on the movable pulley, and the elastic device is easy to lose efficacy in long-term use and has poor functional stability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the gravity tensioning device which has larger buffer capacity and can effectively reduce the complexity of a ground power generation system.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
the gravity tensioning device comprises a frame, and further comprises a plurality of fixed pulley blocks which are fixed on the upper part of the frame and are arranged in parallel, wherein each fixed pulley block comprises a first fixed shaft which is arranged on the frame, and a plurality of fixed pulleys are arranged on each first fixed shaft; the device also comprises a plurality of movable pulleys arranged at the lower part of the frame, wherein the movable pulleys are in one-to-one correspondence with the fixed pulleys; the movable pulley is also connected with a counterweight, and the whole counterweight is in a trend of light front and heavy back.
In practical applications, the ropes are wound one by one from the rope inlet one movable pulley at a time and finally fixed on the last movable pulley/fixed pulley. In the invention, the rope inlet close to the rope is the front, and the fixing position close to the rope is the rear. That is, the first wound fixed/movable pulley is the front and the last wound fixed/movable pulley is the rear.
In the prior art, the winding of the cable and the keeping of the stress of the cable are realized by adopting a mode of arranging a cable buffer mechanism and a rope containing winch, and the invention is characterized in that a plurality of rows of movable pulley blocks and a plurality of rows of fixed pulley blocks are arranged, and in practical application, the cable is wound on the fixed pulley and the movable pulley one by one, namely, the cable is wound on a plurality of pulley blocks. On the one hand, because a certain distance exists between the movable pulley block and the fixed pulley block, and the cable is wound on the fixed pulley block one by one, the cable is required to be wound under two pulley blocks (one fixed pulley block and one corresponding movable pulley block form one pulley block), the invention adopts a plurality of rows of fixed pulley blocks and a plurality of rows of corresponding movable pulley blocks, and each fixed pulley block/movable pulley block also comprises a plurality of fixed pulleys/movable pulleys, namely, the device has good rope containing capacity and can directly replace a rope containing winch in the prior art. On the other hand, as the movable pulley is connected with the counterweight, the rope is tensioned through the dead weight of the movable pulley and the counterweight, and the whole counterweight has a trend of light front and heavy rear, the device also has the function of buffering the classified ropes, and simultaneously can realize the winding and unwinding of the gravity tensioning device on the ropes. In addition, the rope containing capacity of the device can be controlled by controlling the counterweight of the movable pulley. Because the dead weight and the counterweight of the movable pulley block are fixed for a certain gravity tensioning device, the tension applied to the cable can be controlled to be basically constant.
In addition, with the rope winding machine of the prior art, the rope is wound on the rope winding machine by only adopting one winding drum, that is, the ropes are stacked one by one in the rope winding machine, but in practical application, the ropes cannot be wound one by one very regularly, but because the ropes are still stressed in the winding process, the ropes on the Rong Shengjuan winding machine are likely to be embedded between the ropes which are wound, that is, the rope winding machine is disordered in winding of the ropes, and when the ropes are required to be released, because the ropes are embedded with each other, the mutual friction between the ropes is very large when the ropes are released, so that the wear of the ropes is very large, and the service life of the ropes is very easy to be shortened. The gravity tensioning device is adopted to wind the cable, the cable is wound between the fixed pulley and the movable pulley regularly, the cables of all sections are not interfered with each other, and the static friction between the cable and the fixed pulley/the movable pulley is adopted, so that the friction loss is small, and the service life of the cable is prolonged.
For the technical scheme of the invention, if the functions are realized only by the dead weight of the movable pulley, but because the device is used for high-altitude wind power generation, the tensile force received by the cable can reach ton level in practical application, under the condition that the design weight of the movable pulley is very high if the device is controlled only by the dead weight of the movable pulley, the device production cost is very high, and great troubles are necessarily caused for mass production of the device and production, installation and transportation of the device, therefore, in the invention, the gravity tensioning device can be designed according to the tensile force actually received by the cable by adopting standard movable pulleys and then matching each movable pulley with a counterweight.
As one preferable embodiment, the weight of the counterweight of the movable sheave is uniformly increased from front to rear. In practical application, because the weights of the movable pulleys are uniformly increased from front to back, when the cables are required to be released, because the cables are subjected to larger pulling force, the movable pulleys with the smallest weights are firstly wound in the gravity tensioning device, the movable pulleys with the smallest weights firstly lift to release the cables, and then the movable pulleys sequentially lift to release the cables according to the winding sequence of the cables; when the cable needs to be retracted, the tension on the cable is reduced, and the movable pulley is lowered firstly due to the maximum weight of the movable pulley which winds the cable finally, and then the movable pulley is lowered in sequence according to the reverse winding sequence of the cable, so that the cable is retracted. Thus, the winding and unwinding of the mooring rope are realized.
Further preferably, the counterweight of the travelling block follows the following rule: sequencing the movable pulleys according to the winding sequence of the cables, wherein the number of the first wound movable pulley is 1, sequencing the first wound movable pulley in sequence, and the number of the nth wound movable pulley is n, so that the counterweight of the nth movable pulleyWherein k is 1 、c 1 And F is the design tension of the cable.
As another preferable implementation scheme, the movable pulleys are combined into a plurality of rows of movable pulley blocks which are arranged in parallel; the movable pulley block comprises a second fixed shaft, and a plurality of movable pulleys are arranged on the second fixed shaft; one row of fixed pulley blocks corresponds to one row of movable pulley blocks, each row of movable pulley blocks is connected with a counterweight frame respectively, and the whole counterweight frame is in a trend of light front and heavy rear.
Further, the weight of the weight frame is evenly increased from front to back. Specifically, the weight of the counterweight frame of the movable pulley block follows the following rule: sequencing the movable pulley blocks according to the winding sequence of the cables, wherein the sequence number of the first wound movable pulley block is 1, sequencing the movable pulley blocks in sequence, the sequence number of the nth group of winding brake pulley blocks is N, and the weight of each counterweight frameF is the design tension of the cable, k 2 、c 2 Is a coefficient.
As a preferred embodiment, the weight frame includes a weight base plate provided with a pulley mounting portion, and the second fixed shaft is mounted to the pulley mounting portion, wherein the weight base plate is a portion that mainly controls the weight of the weight. As an alternative, a connection for connecting the counterweight can also be provided as a counterweight base plate, while the counterweight base plate can merely serve as a component for connecting the counterweight and the movable pulley block. When the gravity tensioning device is applied to a specific ground generator set, the weight of the weight part can be directly determined according to actual conditions, so that the flexibility of the gravity tensioning device is greatly increased, and the applicability of the gravity tensioning device is improved.
Because the cable is continuously retracted and released in the power generation process of the ground power generation unit, the counterweight frame moves up and down continuously in the power generation process, if the counterweight frame is not limited, larger shaking is likely to occur in the process of moving up and down, and the phenomenon of falling off from the cable rope pulley easily occurs, which is very unfavorable for the device. Then, as a more preferable scheme, in order to avoid the cable from falling out in the process of winding and unwinding, two ends of the counterweight frame are respectively connected with the frame through linear sliding rails. So with the winding and unwinding of hawser, the counter weight frame carries out the up-and-down motion along the linear slide rail, lets the counter weight frame have fixed action track and can avoid the emergence of above-mentioned condition well.
Further, the linear slide rail comprises a moving element and a fixed element, and the moving element is sleeved on the fixed element; the fixed element is vertically arranged on the frame, and the movable element is connected with the counterweight frame. Specifically, the fixed element is a cylindrical shaft fixed on two sides of the frame, and the movable element is a linear motion bearing arranged on two sides of the counterweight frame. Preferably, the linear sliding rails are at least 2 groups and are approximately distributed at two ends of the counterweight frame.
Because the cable is wound between the fixed pulley and the movable pulley in turn, and the cable is wound in an S shape for the fixed pulley block and the movable pulley block which are arranged in parallel, in order to avoid the mutual influence between the fixed pulley block and the movable pulley block, the distance between the fixed pulley block and the movable pulley block cannot be too close, so that the cable can be rubbed with each other when being wound and unwound, and if the distance is too far, the space utilization rate can be too low, the structure is not compact enough, the device volume is too large, and further, the distance between the adjacent fixed pulleys is 20-100 times of the diameter of the cable in order to avoid the mutual influence between the adjacent fixed pulleys and the adjacent movable pulleys; correspondingly, the distance between the adjacent movable pulleys is 20-100 times of the diameter of the cable.
The distance between the fixed pulley block and the movable pulley block is an important factor for determining the maximum rope capacity of the device, and further, the minimum distance between the fixed pulley block and the movable pulley block is= (0.6-0.8) total length of the cable/the number of movable pulleys.
The gravity tensioning device provided by the invention comprises a plurality of rows of fixed pulley blocks which are arranged in parallel, the number of the fixed pulley blocks is determined according to the length of a cable, that is, the longer the length of the cable is, the larger the design volume of the gravity tensioning device is, that is, the gravity tensioning device is likely to be redesigned for different scenes, so that huge waste is easily caused. To avoid this, as a preferred embodiment, the fixed pulley group is 20 to 50 groups. The fixed pulley block number suitable for most of cable winding is selected, and the cable containing capacity of the weight adjusting device of the counterweight frame is matched, so that one or more gravity tensioning devices can be used for combination according to actual conditions in practical application.
Compared with the prior art, the gravity tensioning device provided by the invention is a rope containing device with a rope buffering function, comprises a plurality of rows of movable pulley blocks and a plurality of rows of fixed pulley blocks, can directly replace a rope buffering mechanism and a Rong Shengjuan lifter in the prior art, can effectively reduce the structural complexity of a ground power generation system, and greatly reduces the arrangement difficulty of the ground power generation system. The device has the advantages of simple structure, relatively small occupied area, very large capacity and buffer capacity as a cable buffer device, high stability, small friction loss to the cable and contribution to the service life extension of the cable.
Drawings
FIG. 1 is a front view of an embodiment;
FIG. 2 is a right side view of the embodiment;
fig. 3 is a perspective view of an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, the embodiment provides a gravity tensioning device, which is mainly applied to the field of high-altitude wind power generation, and specifically comprises a frame 1, a plurality of fixed pulley blocks 2 fixed on the upper part of the frame 1 and arranged in parallel, and a plurality of movable pulley blocks 3 arranged on the lower part of the frame 1 and arranged in parallel; the fixed pulley block 2 comprises a first fixed shaft 201 arranged on the frame, and a plurality of fixed pulleys 202 are arranged on the first fixed shaft 201; the movable pulley block comprises a second fixed shaft 301, and a plurality of movable pulleys 302 are mounted on the second fixed shaft 301; a row of the fixed pulley blocks 202 corresponds to a row of the movable pulley blocks 302.
Specifically, each fixed pulley and each movable pulley in the corresponding fixed pulley block and movable pulley block are also corresponding to each other, and as a preferable condition, the corresponding fixed pulleys and movable pulleys are positioned on the same vertical plane. The cable is wound by a pulley block and a pulley block in turn for a group of corresponding fixed pulley blocks and movable pulley blocks; and the mooring rope is wound in an S shape between the fixed pulley block and the movable pulley block which are arranged side by side.
Wherein, each movable pulley block 3 is respectively connected with a counterweight frame 4. As shown in fig. 3, the weight frame 4 includes a weight plate 401, pulley mounting portions 402 are further provided on both sides of the weight plate 401, and the second fixing shaft 301 is mounted on the pulley mounting portions 402. The pulley mounting portions 402 may be plate-shaped as shown in fig. 3, and are mounted on both sides of the counterweight bottom plate 401, and protrude from the counterweight bottom plate 401, so that a mounting position for mounting the movable pulley block 3 is formed, and then the movable pulley block 3 is mounted on the counterweight housing 4 by mounting the second fixing shaft 301 between the pulley mounting portions 402.
The weight of the weight frame 4 is uniformly increased from front to rear. Specifically, the weight of the counterweight frame of the movable pulley block follows the following rule: sequencing the movable pulley blocks according to the winding sequence of the cables, wherein the sequence number of the first wound movable pulley block is 1, sequencing the movable pulley blocks in sequence, the sequence number of the nth group of winding brake pulley blocks is N, and the weight of each counterweight frameF is the design tension of the cable, k 2 、c 2 Is a coefficient.
In practical application, because the weight frames 4 connected with the movable pulley blocks are evenly increased from front to back, when the cable is required to be released, because the cable is subjected to larger tension, the weight of the weight frame of the movable pulley block which firstly winds the cable in the gravity tensioning device is the smallest, the movable pulley block with the smallest weight firstly rises to release the cable, and then the movable pulley blocks rise in sequence according to the winding sequence of the cable to release the cable; when the cable needs to be retracted, the tension on the cable can be reduced, and as the weight of the counterweight frame of the movable pulley block which winds the cable finally is the largest, the movable pulley block can firstly descend, and then the movable pulley block descends in turn according to the reverse winding sequence of the cable, so that the cable is retracted. Thus, the winding and unwinding of the mooring rope are realized.
Two ends of the counterweight frame 4 are respectively connected with the frame 1 through linear slide rails 5. The linear slide rail 5 comprises a moving element 501 and a fixed element 502, wherein the moving element 502 is sleeved on the fixed element 501; the fixed element 501 is mounted vertically on the frame 1, and the moving element 502 is connected to the counterweight housing 4. The fixed element 501 is a cylindrical shaft fixed on two sides of the frame 1, and the moving element 502 is a linear motion bearing mounted on two sides of the counterweight frame 4.
In a more preferred embodiment, the pulley mounting portion 402 is an L-shaped plate, one side of which is attached to the side surface of the counterweight base plate 401 and mounted to the side surface of the counterweight base plate 401, and the other side of which is used for mounting a linear motion bearing. Specifically, the L-shaped plate is provided with a hole on the side for installing the linear motion bearing, and is also sleeved on the cylindrical shaft, and the diameter of the hole is at least slightly larger than that of the cylindrical shaft, so that the L-shaped plate cannot influence the motion of the linear motion bearing when the linear motion bearing moves up and down along the cylindrical shaft.
As a preferred embodiment, at least 2 sets of linear slides 5 are provided on the basis of any of the above examples, and are distributed substantially at both ends of the counterweight housing 4.
As a preferred embodiment, on the basis of any of the above examples, the distance between the fixed pulley block 2/the movable pulley block 3 is 20 to 100 times the diameter of the cable; the distance between the adjacent fixed pulleys and the movable pulleys is 20-100 times of the diameter of the cable.
Further, the minimum distance between the fixed pulley block and the movable pulley block= (0.6-0.8) total length of the cable/number of movable pulleys.
Example 2
The embodiment provides a gravity tensioning device which is mainly applied to the field of high-altitude wind power generation, and particularly comprises a frame, and further comprises a plurality of fixed pulley blocks which are fixed on the upper part of the frame and are arranged in parallel, wherein each fixed pulley block comprises a first fixed shaft which is arranged on the frame, and a plurality of fixed pulleys are arranged on the first fixed shaft; the device also comprises a plurality of movable pulleys arranged at the lower part of the frame, wherein the movable pulleys correspond to the fixed pulleys one by one; each movable pulley is also connected with a counterweight respectively, and the whole counterweight has a tendency of light front and heavy rear.
In the gravity tensioning device, the ropes are wound one by one from the rope inlet according to one movable pulley at a time and are finally fixed on the last movable pulley/fixed pulley, so that the first wound fixed pulley/movable pulley is the front, and the last wound fixed pulley/movable pulley is the rear.
The weight of the counterweight of the movable pulley is evenly increased from front to back. Specifically, the counterweight of the movable pulley follows the following rule: sequencing the movable pulleys according to the winding sequence of the cables, wherein the number of the first wound movable pulley is 1, sequencing the first wound movable pulley in sequence, and the number of the nth wound movable pulley is n, so that the counterweight of the nth movable pulleyWherein k is 1 、c 1 And F is the design tension of the cable.
In practical application, because the weights of the movable pulleys are uniformly increased from front to back, when the cables are required to be released, because the cables are subjected to larger pulling force, the movable pulleys with the smallest weights are firstly wound in the gravity tensioning device, the movable pulleys with the smallest weights firstly lift to release the cables, and then the movable pulleys sequentially lift to release the cables according to the winding sequence of the cables; when the cable needs to be retracted, the tension on the cable is reduced, and the movable pulley is lowered firstly due to the maximum weight of the movable pulley which winds the cable finally, and then the movable pulley is lowered in sequence according to the reverse winding sequence of the cable, so that the cable is retracted. Thus, the winding and unwinding of the mooring rope are realized.
As a preferred embodiment, on the basis of any of the above examples, the distance between the fixed pulley block 2/the movable pulley block 3 is 20 to 100 times the diameter of the cable; the distance between the adjacent fixed pulleys and the movable pulleys is 20-100 times of the diameter of the cable.
Further, the minimum distance between the fixed pulley block and the movable pulley block= (0.6-0.8) total length of the cable/number of movable pulleys.
The above examples are provided for the purpose of clearly illustrating the invention and are not to be construed as limiting the invention in any way. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. The gravity tensioning device comprises a frame and is characterized by further comprising a plurality of fixed pulley blocks which are fixed on the upper part of the frame and are arranged in parallel, wherein each fixed pulley block comprises a first fixed shaft which is arranged on the frame, and a plurality of fixed pulleys are arranged on each first fixed shaft; the device also comprises a plurality of movable pulleys arranged at the lower part of the frame, wherein the movable pulleys are in one-to-one correspondence with the fixed pulleys; the fixed pulley and the movable pulley which correspond to each other are positioned on the same vertical plane;
the movable pulleys form a plurality of rows of movable pulley blocks which are arranged in parallel; the movable pulley block comprises a second fixed shaft, and a plurality of movable pulleys are arranged on the second fixed shaft; the fixed pulley blocks in one row correspond to the movable pulley blocks in one row, each row of the movable pulley blocks is connected with a counterweight frame respectively, and the whole counterweight frame is in a trend of light front and heavy rear;
the weight of the counterweight frame of the movable pulley block follows the following rule: sequencing the movable pulley blocks according to the winding sequence of the cables, wherein the sequence number of the first wound movable pulley block is 1, sequencing the sequence number of the nth group of movable pulley blocks which are wound is N, and the weight T of each counterweight frame N =(k 2 ·F·N)/c 2 F is the design tension of the cable, k 2 、c 2 Is a coefficient.
2. The gravity tensioner of claim 1, wherein the weight frame comprises a weight base plate having a sheave mounting portion disposed thereon, the second stationary shaft being mounted to the sheave mounting portion.
3. The gravity tensioner of claim 1, wherein the two ends of the weight frame are connected to the frame by linear slide rails, respectively.
4. A gravity tensioner according to claim 3, wherein the linear rail comprises a moving element and a fixed element, the moving element being sleeved on the fixed element; the fixed element is vertically arranged on the frame, and the movable element is connected with the counterweight frame.
5. The gravity tensioner of claim 1, wherein the spacing between adjacent fixed pulleys is 20-100 times the diameter of the cable; and/or the distance between adjacent movable pulleys is 20-100 times of the diameter of the cable.
6. The gravity tensioner of claim 1, wherein a minimum distance between the fixed pulley block and the movable pulley block = (0.6-0.8) total length of cable/number of movable pulleys.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810772218.7A CN108726406B (en) | 2018-07-13 | 2018-07-13 | Gravity tensioning device |
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|---|---|---|---|
| CN201810772218.7A CN108726406B (en) | 2018-07-13 | 2018-07-13 | Gravity tensioning device |
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| CN108726406B true CN108726406B (en) | 2023-08-08 |
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| CN108726406A (en) | 2018-11-02 |
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