An electric tension machine and its control system

Abstract

This invention discloses an electric tension machine and its control system, relating to the field of tension machine technology. By incorporating an energy recovery mechanism, it can be used in conjunction with a first tension roller to jointly regulate the tension on the cable. Furthermore, while braking the second tension roller, the energy recovery component can recover the mechanical energy generated during braking or deceleration, converting it into electrical energy and storing it in a battery, thus avoiding energy waste. Utilizing friction braking for relative transmission, this invention uses the resistance encountered when the rotating coil cuts magnetic lines of force as braking force, adjusting the speed of the second tension roller in a non-contact state. This avoids the damping force drift caused by prolonged wear of the friction plates, ensuring a high level of parameter adjustment accuracy in the tension control system. This results in high output stability and control response characteristics of the tension machine under dynamic operating conditions.

Description

Technical Field

[0001] This invention relates to the field of tension machine technology, specifically to an electric tension machine and its control system. Background Technology

[0002] Electric tensioners are key equipment in power grid construction and industrial processing. They use electric motors as the core power source and achieve precise tension control through an intelligent control system.

[0003] In current tensioning machine designs, power is transmitted to the driven wheel via friction between the power transmission line and its contact surface. Given the large mass of the driven wheel, it generates significant rotational inertia during high-speed rotation. When the drive system stops, the driven wheel continues to spin due to inertia, potentially leading to excessive entanglement of the power transmission line. To suppress this inertial motion, current electric tensioning machines incorporate friction damping in the driven wheel shaft system. This increases the frictional resistance between the shaft and the frame, dissipating inertial kinetic energy and effectively preventing the driven wheel from continuously spinning after shutdown.

[0004] Referring to the patent application CN221565330U, a novel electric tension machine is disclosed. By using an electric motor instead of a diesel engine to drive the power wheel of the tension machine, the problems of high noise, high energy consumption, and exhaust emissions of diesel engines are solved. Moreover, the speed control of the electric motor is more precise than that of the diesel engine, making it convenient to adjust the wire release speed at any time. By setting up an inverter, the mechanical energy of the electric motor is recovered during the wire pulling and release process, and then output to the outside for use in other electrical equipment or for energy storage in batteries. The recovery of energy from the tension machine is also the process of the tension machine providing tension, thus solving the problem of traditional tension machines requiring hydraulic cylinders for heat dissipation.

[0005] The electric tensioners described above have the following drawbacks in practical use:

[0006] In the aforementioned patent, the method of consuming inertial kinetic energy by increasing the frictional resistance between the shaft and the frame to achieve the effect of fast braking of the driven wheel results in the gradual wear of the friction brake pad surface after long-term operation, which leads to the drift of the damping force value and the gradual decrease of the parameter adjustment accuracy of the tension control system. This mechanical loss not only shortens the service life of the friction brake pad, but also directly affects the output stability and control response characteristics of the tension machine under dynamic working conditions.

[0007] Secondly, controlling the rotational speed of the driven wheel through friction braking causes all of its kinetic energy to be dissipated as heat, making it impossible to recover and utilize the kinetic energy of the driven wheel, thus resulting in energy waste.

[0008] Therefore, the present invention proposes an electric tension machine and a control system for the tension machine to solve the above problems. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides an electric tension machine and its control system. It solves the problem that existing electric tension machines consume the inertial kinetic energy of the driven wheel by increasing the frictional resistance between the shaft and the frame. This leads to gradual wear of the friction brake pads over long-term operation, causing the damping force value to drift and consequently reducing the parameter adjustment accuracy of the tension control system. This mechanical loss not only shortens the service life of the friction brake pads but also directly affects the output stability and control response characteristics of the tension machine under dynamic operating conditions. Furthermore, controlling the driven wheel's speed through friction braking causes all of the driven wheel's kinetic energy to be dissipated as heat, making it impossible to recover and utilize the driven wheel's kinetic energy, thus resulting in energy waste.

[0010] To achieve the above objectives, the present invention provides the following technical solution: an electric tension machine, comprising a movable support, and further comprising:

[0011] The first tension roller and the second tension roller are respectively rotatably mounted on both sides inside the movable bracket via a drive shaft. A servo motor for driving the first tension roller to rotate is also fixedly mounted on the side wall of the movable bracket.

[0012] The energy recovery mechanism is located on the outer wall of the movable support near the second tension roller. It works with the first tension roller to adjust the tension of the second tension roller and can recover the mechanical energy generated by the tensioner during braking or deceleration, convert it into electrical energy and store it in the energy storage battery.

[0013] The energy recovery mechanism also includes a support cylinder and a protective cover detachably disposed at one end of the support cylinder. Multiple clearance slots are evenly provided on the outer wall of the protective cover. The support cylinder is evenly provided with a first energy recovery component, a second energy recovery component, and a third energy recovery component for cooperating with each other or operating independently to regulate the braking force on the second tension roller. The first energy recovery component, the second energy recovery component, and the third energy recovery component all regulate their own braking force on the second tension roller through a drive component, and simultaneously increase or decrease the coolant flow rate during the braking process according to the increase or decrease of the braking force through a coolant pumping component.

[0014] Furthermore, a fourth gear is fixedly installed at one end of the drive shaft near the bearing cylinder, which is used to simultaneously drive the first energy recovery component, the second energy recovery component, and the third energy recovery component to operate. The first energy recovery component, the second energy recovery component, and the third energy recovery component are all connected to the annular pipe, which is connected to the coolant storage cylinder through a pipe.

[0015] Furthermore, the drive assembly includes an electric motor fixedly mounted on the outer wall of the protective cover. The output end of the electric motor rotates through the bearing cylinder and is connected to a drive ring assembly via a connector. The drive ring assembly includes a first arc-shaped block, a second arc-shaped block, and a third arc-shaped block connected end to end to form a complete closed-loop structure. A first arc-shaped rack, a second arc-shaped rack, and a third arc-shaped rack are respectively fixedly mounted on the outer walls of the first arc-shaped block, the second arc-shaped block, and the third arc-shaped block.

[0016] Furthermore, the structures of the first, second, and third arc-shaped blocks are identical, and the arc-shaped sidewalls of the first, second, and third arc-shaped blocks are equally divided into three regions, which are respectively the first segment region, the second segment region, and the third segment region. The first arc-shaped rack is fixedly installed in the first segment region of the first arc-shaped block, the second arc-shaped rack is fixedly installed in the second segment region of the second arc-shaped block, and the third arc-shaped rack is fixedly installed in the third segment region of the third arc-shaped block. The two ends of the third arc-shaped rack and the first arc-shaped rack abut against each other, and the first, second, and third arc-shaped blocks rotate in a clockwise direction.

[0017] Furthermore, the coolant pumping assembly includes a coolant storage tank fixedly disposed inside the carrier cylinder. A piston plate is slidably disposed inside the coolant storage tank. A second push-pull rod is fixedly disposed at one end of the piston plate. One end of the second push-pull rod slidably passes through the coolant storage tank and is fixedly disposed on a circular plate. Protrusions are fixedly disposed on both sides of the outer wall of the circular plate away from the second push-pull rod. A spring is slidably sleeved on the outer wall of the second push-pull rod between the piston plate and the outer wall of the carrier cylinder. A drive block is fixedly disposed on one side of the circular plate and on both sides of the outer wall of the fourth gear. The positions of the two drive blocks and the two protrusions are arranged in a one-to-one correspondence.

[0018] Furthermore, the first energy recovery component, the second energy recovery component, and the third energy recovery component have the same structure. The first energy recovery component includes a housing that is detachably disposed inside the bearing cylinder. Inside the housing, a rotor is rotatably disposed via a bracket. One end of the rotor rotatably passes through the housing and is fixedly disposed with a first gear that meshes with and is connected to a fourth gear. Sliding sleeves are fixedly disposed on both sides of the inner wall of the housing. A permanent magnet is slidably disposed inside each sliding sleeve. A first push-pull rod is fixedly disposed on the side wall of each of the two permanent magnets.

[0019] Furthermore, a connecting rod is fixedly provided at one end of both first push-pull rods. A screw rod is threaded through the middle of the connecting rod. A second gear is fixedly provided at the end of the screw rod away from the first push-pull rod. An annular heat dissipation pipe is also fixedly provided on the inner wall of the housing. A flow control component for discharging the internal coolant is provided on the outer wall of the annular heat dissipation pipe. A coolant inlet pipe is also fixedly provided at the bottom of the annular heat dissipation pipe. A second one-way valve for allowing only coolant to flow into the annular heat dissipation pipe is fixedly provided inside the coolant inlet pipe.

[0020] Furthermore, the flow control assembly includes a housing, inside which a circular plate is rotatably disposed. The circular plate has a through hole. A rotating shaft is fixedly disposed at the center of the side wall of the circular plate. The rotating shaft rotatably passes through the housing and is fixedly disposed on a third gear. The bottom of the third gear meshes with a spur rack. The spur rack is fixedly disposed on the top of a connecting rod by a support column. A first return pipe and a second return pipe, which are connected to the interior of the housing, are fixedly disposed on both sides of the outer wall of the housing, respectively. Inside the second return pipe, a first one-way valve that only allows coolant to flow out of the housing is fixedly disposed.

[0021] The present invention also discloses a control system for an electric tension machine, which includes a control box and a tension sensor for acquiring cable tension information on the electric tension machine. A position sensor is also provided on the first energy recovery component. The tension information acquired by the tension sensor and the real-time position information acquired by the position sensor are sent to the control box, and the operating status of the servo motor is controlled by the control box.

[0022] This invention provides an electric tension machine and a control system for the tension machine. Compared with the prior art, it has the following advantages:

[0023] 1. An electric tension machine and its control system, which, by setting an energy recovery mechanism, can be used in conjunction with a first tension roller to jointly regulate the tension on the cable. Moreover, while braking the second tension roller, the energy recovery component can recover the mechanical energy of the tension machine during braking or deceleration, convert it into electrical energy and store it in an energy storage battery, thereby avoiding energy waste. The relative transmission utilizes friction braking. This invention can use the resistance encountered when the rotating coil cuts the magnetic field lines as braking force, which can regulate the speed of the second tension roller in a non-contact state, avoiding the situation where the damping force value drifts due to long-term wear of the friction plate. This ensures that the parameter adjustment accuracy of the tension control system is at a high level, so that the tension machine has high output stability and control response characteristics under dynamic working conditions.

[0024] 2. An electric tension machine and its control system, by setting a first energy recovery component, a second energy recovery component, and a third energy recovery component in the energy recovery mechanism, and cooperating with a drive component, can select one or more of the first, second, and third energy recovery components to sequentially engage in the braking operation of the second tension roller according to the required tension or braking force value. This achieves independent or cooperative working modes for the three energy recovery components, enabling linear control of the braking force from small to large, greatly increasing the control range of the braking force value. Furthermore, when the first energy recovery component is working, by adjusting the overlapping area of ​​the permanent magnet and the coil in the rotor, the area of ​​the magnetic field lines cut by the coil during rotation is controlled, thereby controlling the resistance value of a single energy recovery component relative to the second tension roller, further expanding the adjustment range of the braking force value for the second tension roller, ensuring that the tension applied to the cable remains relatively stable.

[0025] 3. An electric tension machine and its control system, through the linkage design between the coolant pumping component, the annular heat sink, the flow control component, and the drive component, can control the relative area between the through hole and the first return pipe and the second return pipe by driving the third gear to rotate through the rack when the drive component adjusts the position of the permanent magnet, thereby controlling the amount of coolant passing through per unit time. That is, when the relative area between the through hole and the first return pipe and the second return pipe increases, the amount of coolant flowing through the through hole at that position increases, and vice versa. This heat dissipation capacity is positively correlated with the magnitude of the gradually increasing induced current value in the rotor. After the coolant flow rate increases, the heat exchange capacity of the annular heat sink is enhanced, thereby removing more heat from the rotor surface and achieving effective protection of the energy recovery component. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the second overall three-dimensional structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the bottom structure of the present invention;

[0029] Figure 4 For the present invention Figure 3 A magnified structural diagram of part A in the diagram;

[0030] Figure 5 This is a schematic diagram of the assembly state of the energy recovery mechanism, drive shaft, and second tension roller of the present invention.

[0031] Figure 6This is a schematic diagram of the first assembly state of the drive shaft and energy recovery mechanism of the present invention;

[0032] Figure 7 For the present invention Figure 6 A magnified structural diagram of part B in the diagram;

[0033] Figure 8 This is a schematic diagram of the second assembly state of the drive shaft and energy recovery mechanism of the present invention;

[0034] Figure 9 This is a three-dimensional structural diagram of the drive component in the energy recovery mechanism of the present invention;

[0035] Figure 10 This is a front view structural diagram of the drive component in the energy recovery mechanism of the present invention;

[0036] Figure 11 This is a schematic diagram of the first internal structure of the energy recovery mechanism of the present invention;

[0037] Figure 12 For the present invention Figure 11 A magnified structural diagram of part C in the diagram;

[0038] Figure 13 This is a schematic diagram of the second internal structure of the energy recovery mechanism of the present invention;

[0039] Figure 14 This is a schematic diagram of the assembly state of the drive component and the second gear of the present invention;

[0040] Figure 15 This is a cross-sectional view of the energy recovery component of the present invention;

[0041] Figure 16 For the present invention Figure 15 A magnified structural diagram of part D in the diagram;

[0042] Figure 17 This is a schematic diagram of the overall structure of the first energy recovery component of the present invention;

[0043] Figure 18 This is a schematic diagram of the first cross-sectional structure of the first energy recovery component of the present invention;

[0044] Figure 19 This is a schematic diagram of the second cross-sectional structure of the first energy recovery component of the present invention;

[0045] Figure 20 This is a schematic diagram of the overall structure of the flow control component of the present invention;

[0046] Figure 21 This is a cross-sectional view of the flow control component of the present invention.

[0047] In the diagram: 1. Movable support; 2. First tension roller; 3. Second tension roller; 4. Servo motor; 5. Control box; 6. Energy recovery mechanism; 61. Bearing cylinder; 62. Protective cover; 63. Clearance slot; 64. First energy recovery component; 641. Housing; 642. Rotor; 643. First gear; 644. Sliding sleeve; 645. Permanent magnet; 646. First push-pull rod; 647. Connecting rod; 648. Screw; 649. Second gear; 6410. Annular heat sink; 6411. Flow control component; a1. Housing; a2. Circular plate; a3. Through hole; a4. Third gear; a5. Spur rack; a6. Support column; a7. 6412. First return pipe; a8. Second return pipe; a9. First check valve; 6412. Coolant inlet pipe; 6413. Second check valve; 65. Second energy recovery assembly; 66. Third energy recovery assembly; 67. Annular pipe; 68. Coolant storage tank; 69. Piston plate; 610. Second push-pull rod; 611. Circular plate; 612. Protrusion; 613. Spring; 615. Drive block; 616. Electric motor; 617. First arc-shaped block; 618. First arc-shaped rack; 619. Second arc-shaped block; 620. Second arc-shaped rack; 621. Third arc-shaped block; 622. Third arc-shaped rack; 7. Drive shaft; 8. Fourth gear. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] This invention provides three technical solutions: an electric tension machine, specifically including the following embodiments:

[0050] like Figures 1-8 A first embodiment is shown: an electric tensioner, including a movable support 1, and further comprising:

[0051] The first tension roller 2 and the second tension roller 3 are respectively rotatably mounted on both sides inside the movable bracket 1 via the transmission shaft 7. A servo motor 4 for driving the first tension roller 2 to rotate is also fixedly mounted on the side wall of the movable bracket 1. A drive gear is fixedly mounted on the output end of the servo motor 4. A large gear ring is fixedly mounted on one side of the outer wall of the first tension roller 2. The drive gear and the large gear ring are meshed and connected to each other.

[0052] The energy recovery mechanism 6 is located on the outer wall of the movable support 1 near the second tension roller 3. It works in conjunction with the first tension roller 2 to adjust the tension of the second tension roller 3 and can recover the mechanical energy generated by the tensioner during braking or deceleration, convert it into electrical energy and store it in the energy storage battery.

[0053] The energy recovery mechanism 6 also includes a support cylinder 61 and a protective cover 62 detachably disposed at one end of the support cylinder 61. Multiple clearance slots 63 are evenly provided on the outer wall of the protective cover 62. The support cylinder 61 is evenly provided with a first energy recovery component 64, a second energy recovery component 65, and a third energy recovery component 66 for mutual cooperation or independent operation to regulate the braking force on the second tension roller 3. The first energy recovery component 64, the second energy recovery component 65, and the third energy recovery component 66 all regulate their own braking force on the second tension roller 3 through the drive component, and at the same time, according to the increase or decrease of the braking force, the coolant pumping component automatically and synchronously increases or decreases the coolant flow rate during the braking process.

[0054] like Figures 9-16 The second embodiment is shown, differing from the first embodiment in that a fourth gear 8 is fixedly mounted on one end of the drive shaft 7 near the bearing cylinder 61, for simultaneously driving the first energy recovery component 64, the second energy recovery component 65, and the third energy recovery component 66. These components are all connected to an annular pipe 67, which is connected to a coolant storage cylinder 68 via a pipe. The annular pipe 67 is fixedly mounted on the inner wall of the protective cover 62, and the drive assembly is rotatably mounted within the space between the bearing cylinder 61 and the protective cover 62.

[0055] In this embodiment, the drive assembly includes an electric motor 616 fixedly mounted on the outer wall of the protective cover 62. The output end of the electric motor 616 rotates through the bearing cylinder 61 and is connected to a drive ring assembly via a connector. The drive ring assembly includes a first arc-shaped block 617, a second arc-shaped block 619, and a third arc-shaped block 621 connected end to end to form a complete closed-loop structure. A first arc-shaped rack 618, a second arc-shaped rack 620, and a third arc-shaped rack 622 are respectively fixedly mounted on the outer walls of the first arc-shaped block 617, the second arc-shaped block 619, and the third arc-shaped block 621. The three arc-shaped racks 618, 620, and 622 have identical structures. During the engagement and disengagement process between the arc-shaped racks 618, 620, and 622 and the corresponding second gear 649, the projections of the permanent magnet 645 and the corresponding rotor coil portion of the rotor 642 change from no overlap to the projection of the permanent magnet 645 completely covering the rotor 642. The electric motor 616, controlled by the control box 5, rotates at a preset low and uniform speed each time it starts, and flexibly adjusts the resistance values ​​applied to the second tension roller 3 by the first energy recovery component 64, the second energy recovery component 65, and the third energy recovery component 66 based on the cable tension information fed back by the tension sensor.

[0056] In this embodiment, the structures of arc-shaped block 617, arc-shaped block 619, and arc-shaped block 621 are identical, and the arc-shaped sidewalls of arc-shaped block 617, arc-shaped block 619, and arc-shaped block 621 are equally divided into three regions, which are respectively the first segment region, the second segment region, and the third segment region. The arc-shaped rack 618 is fixedly installed in the first segment region of arc-shaped block 617, the arc-shaped rack 620 is fixedly installed in the second segment region of arc-shaped block 619, and the arc-shaped rack 622 is fixedly installed in the third segment region of arc-shaped block 621. The ends of the arc-shaped rack 622 and the arc-shaped rack 618 abut against each other, and the arc-shaped blocks 617, arc-shaped block 619, and arc-shaped block 621 rotate in a clockwise direction. In the initial state of the drive ring assembly, the second gear 649 and the first arc-shaped rack 618 in the first energy recovery assembly 64 are meshed together, and the first arc-shaped rack 618 is at its starting end, i.e., the starting position of the first segment. At this time, the second gear 649 in the second energy recovery assembly 65 and the third energy recovery assembly 66 are respectively at the starting ends of the first segment in the second arc-shaped block 619 and the third arc-shaped block 621. When the first arc rack 618 is completely swept away, the second gear 649 in the second energy recovery component 65 is just meshed with the second arc rack 620. At this time, the second gear 649 in the third energy recovery component 66 is at the beginning of the second section of the third arc block 621. After the second gear 649 in the second energy recovery component 65 has completely swept away the second arc rack 620, the second gear 649 in the third energy recovery component 66 is just meshed with the third arc rack 622.

[0057] In this embodiment, the coolant pumping assembly includes a coolant storage tank 68 fixedly disposed inside the support tank 61. A piston plate 69 is slidably disposed inside the coolant storage tank 68. A second push-pull rod 610 is fixedly disposed at one end of the piston plate 69. One end of the second push-pull rod 610 slides through the coolant storage tank 68 and is fixedly disposed on a circular plate 611. Protrusions 612 are fixedly disposed on both sides of the outer wall of the circular plate 611 away from the second push-pull rod 610. A spring 613 is slidably sleeved on the outer wall of the second push-pull rod 610 between the piston plate 69 and the outer wall of the support tank 61. A drive block 615 is fixedly disposed on one side of the circular plate 611 and on both sides of the outer wall of the fourth gear 8. The positions of the two drive blocks 615 and the two protrusions 612 are arranged in a one-to-one correspondence. The drive shaft 7 and the coolant storage tank 68 are connected by a pipe, and the input end of the pipe is located on the side of the piston plate 69 away from the second push-pull rod 610. The support tank 61 is fixedly disposed on the side wall of the movable bracket 1 by bolts and a mounting bracket.

[0058] like Figures 17-21The third embodiment is shown, which differs from the second embodiment in that the first energy recovery component 64, the second energy recovery component 65, and the third energy recovery component 66 have the same structure. The first energy recovery component 64 includes a housing 641 that is detachably disposed inside the bearing cylinder 61. A rotor 642 is rotatably disposed inside the housing 641 via a bracket. One end of the rotor 642 rotatably passes through the housing 641 and is fixedly disposed with a first gear 643 that meshes with the fourth gear 8. Sliding sleeves 644 are fixedly disposed on both sides of the inner wall of the housing 641. A permanent magnet 645 is slidably disposed inside each sliding sleeve 644. A first push-pull rod 646 is fixedly disposed on the side wall of each of the two permanent magnets 645.

[0059] In this embodiment, a connecting rod 647 is fixedly mounted on one end of each of the two first push-pull rods 646. A screw 648 is threaded through the middle of the connecting rod 647. A second gear 649 is fixedly mounted on the end of the screw 648 away from the first push-pull rods 646. An annular heat sink 6410 is also fixedly mounted on the inner wall of the housing 641. A flow control component 6411 for draining the internal coolant is mounted on the outer wall of the annular heat sink 6410. A coolant inlet pipe 6412 is also fixedly mounted at the bottom of the annular heat sink 6410. A second one-way valve 6413 for allowing only coolant to flow into the annular heat sink 6410 is fixedly mounted inside the coolant inlet pipe 6412. Two permanent magnets 645 are arranged opposite each other, and the magnetic field formed by the two can generate an induced current in conjunction with the rotating rotor 642. One end of the screw 648 is rotatably connected to the housing 641. The rotor 642 outputs the generated electrical energy through brushes and wires connected to the brushes and stores it in the energy storage battery.

[0060] In this embodiment, the flow control component 6411 includes a housing a1. A circular plate a2 is rotatably disposed inside the housing a1. A through hole a3 is formed inside the circular plate a2. A rotating shaft is fixedly disposed at the center of the side wall of the circular plate a2. The rotating shaft rotatably passes through the housing a1 and is fixedly disposed on a third gear a4. A rack a5 meshes with the bottom of the third gear a4. The rack a5 is fixedly disposed on the top of the connecting rod 647 via a support column a6. A first return pipe a7 and a second return pipe a8, respectively, are fixedly disposed on both sides of the outer wall of the housing a1 and communicate with its interior. A first one-way valve a9, which only allows coolant to flow out of the housing a1, is fixedly disposed inside the second return pipe a8. The bottom end of the second return pipe a8 is connected to an annular pipe 67. One end of the coolant input pipe 6412 is connected to the interior of the coolant storage cylinder 68. The rack a5 can move freely within the clearance groove 63 at the corresponding position.

[0061] This invention also provides a control system for an electric tension machine, comprising a control box 5 and a tension sensor for acquiring cable tension information on the electric tension machine. A position sensor is also provided on the first energy recovery component 64. The tension information acquired by the tension sensor and the real-time position information acquired by the position sensor are sent to the control box 5. The control box 5 controls the operation of the servo motor 4. The position sensor is fixedly mounted on the side wall of the connecting rod 647 relative to the housing 641, and is used to measure the distance between the connecting rod 647 and the housing 641 in real time. Since the initial distance between the connecting rod 647 and the housing 641 is a known value, the initial position of the permanent magnet 645 is also a known value. The initial position of the permanent magnet 645 is such that the projection of the coil position of the rotor 642 in the vertical direction does not overlap, meaning that no current is generated when the rotor 642 rotates in the initial state. Based on the initial state, for every centimeter the connecting rod 647 moves closer to the housing 641, the overlap length between the permanent magnet 645 and the coil portion of the rotor 642 increases by one centimeter. When the connecting rod 647 moves a preset distance relative to the housing 641, the permanent magnets 645 on both sides can just cover the coil portion of the rotor 642.

[0062] In use, the cable passes around the first tension roller 2 and the second tension roller 3 and exits from the front of the first tension roller 2, with one end of the cable connected to the external traction device.

[0063] When the electric tensioner is working, the external traction device and the servo motor 4 operate synchronously, ensuring that the speed at which the servo motor 4 drives the first tension roller 2 to release the cable matches the speed at which the external traction device pulls the cable, thus maintaining a relatively stable tension value for the cable. During the cable release process, the friction between the second tension roller 3 and the second tension roller 3 is used to drive the second tension roller 3 to rotate synchronously.

[0064] As the second tension roller 3 rotates, the drive shaft 7 and the second tension roller 3 are fixedly connected to each other, so the drive shaft 7 and the second tension roller 3 rotate synchronously. The drive shaft 7 drives the fourth gear 8 to simultaneously drive multiple first gears 643 to rotate, so that the rotors 642 in the first energy recovery assembly 64, the second energy recovery assembly 65 and the third energy recovery assembly 66 rotate synchronously.

[0065] When it is necessary to adjust the braking force on the second tension roller 3 or to adjust the tension of the cable in conjunction with the first tension roller 2, the electric motor 616 can be controlled by the control box 5 to rotate clockwise for a specified time at a predetermined speed. The output shaft of the electric motor 616 drives the first arc block 617, the second arc block 619 and the third arc rack 622 to rotate synchronously. The second gear 649 in the first energy recovery component 64 is driven by the first arc rack 618 to rotate. Since the connecting rod 647 and the screw 648 are connected by threads, when the screw 648 rotates, it synchronously drives the connecting rod 647 to move closer to the housing 641. The first push-pull rods 646 on both sides of the connecting rod 647 simultaneously push the two permanent magnets 645 to slide along the inner wall of the sliding sleeve 644 at the corresponding position. The two permanent magnets 645 gradually have overlapping parts from the separated state of the coil part of the rotor 642. The rotating rotor 642 quickly cuts the magnetic field formed by the permanent magnets 645 on both sides, generating an induced current in the coil of the rotor 642. The induced current is transmitted to the external converter through the brush on the rotor 642. After conversion, the current is stored in the energy storage battery.

[0066] As the rotor 642 continuously cuts magnetic field lines during rotation, its rotation is subject to magnetic resistance. With the increase in the relative area between the permanent magnet 645 and the rotor 642 coil, the portion of the rotor 642 coil that cuts magnetic field lines gradually increases, thus increasing the magnetic resistance. Therefore, driving the first gear 643 requires a larger power input. At this time, the fourth gear 8 experiences greater resistance, causing its rotational speed to gradually decrease. In this state, the tension sensor provides feedback on the cable's tension value. When the rotational speed of the first tension roller 2 remains constant, the second tension roller 3 experiences increased rotational resistance, increasing the cable tension. Conversely, when the rotational resistance of the second tension roller 3 decreases, the cable tension gradually decreases.

[0067] After the permanent magnet 645 in the first energy recovery assembly 64 is completely overlapped with the coil portion of the rotor 642, when adjusting the cable tension value while keeping the speed of the first tension roller 2 constant, the electric motor 616 is controlled to rotate again via the control box 5. The second gear 649 and the first arc-shaped rack 618 in the first energy recovery assembly 64 change from an engaged state to a disengaged state. At this time, the second gear 649 in the second energy recovery assembly 65 is just engaged with the second arc-shaped rack 620. The screw 648 in the second energy recovery assembly 65 drives its internal connecting rod 647 to move closer to the housing 641. The overlap area between the two permanent magnets 645 and the coil portion of the rotor 642 in the second energy recovery assembly 65 gradually increases. When the rotor 642 cuts the magnetic field lines, the rotational resistance of the rotor 642 in the second energy recovery assembly 65 gradually increases. Therefore, in this case, the resistance value can be further increased on the basis of the resistance applied by the first energy recovery assembly 64 to the rotation of the second tension roller 3. At this time, the tension value of the cable can be measured by the tension sensor. When the second gear 649 and the second arc rack 620 in the second energy recovery assembly 65 separate, the second gear 649 in the third energy recovery assembly 66 just meshes with the third arc rack 622. Since the control process of the permanent magnet 645 in the third energy recovery assembly 66 is the same as the control process of the permanent magnet 645 in the first energy recovery assembly 64 and the second energy recovery assembly 65, it will not be described again here.

[0068] When the permanent magnets 645 in the first energy recovery assembly 64, the second energy recovery assembly 65, and the third energy recovery assembly 66 are all completely aligned with the coil portion of the rotor 642 in the corresponding position, the rotational resistance of the second tension roller 3 reaches its maximum value. The electric motor 616 is reversed by the control box 5 to drive the first arc block 617, the second arc block 619, and the third arc block 621 back to their original positions. At this time, the resistance of the first energy recovery assembly 64, the second energy recovery assembly 65, and the third energy recovery assembly 66 to the second tension roller 3 is marked as zero.

[0069] While the fourth gear 8 rotates, the two drive blocks 615 on the side wall of the fourth gear 8 simultaneously push the two protrusions 612 at the corresponding positions to move. The circular plate 611 simultaneously pushes the piston plate 69 to move away from the fourth gear 8. The coolant in the coolant storage tank 68 is transported to the annular heat exchange pipe 6410 through 614. Heat exchange occurs between the heat exchange fins on the outer wall of the annular heat exchange pipe 6410 and the air inside the casing 641, and the heat inside the casing 641 is absorbed and cooled. When the piston plate 69 is reset by the elastic force of the spring 613, the suction force generated by the piston plate 69 causes the coolant in the annular heat exchange pipe 6410 to be transported to the annular pipe 67 through the first return pipe a7 and the casing a1. The coolant in the annular pipe 67 then flows back to the coolant storage tank 68 through the pipe.

[0070] When the connecting rod 647 approaches the housing 641, that is, when the area of ​​the rotor 642 cutting the magnetic field lines increases, the induced current inside the rotor 642 increases, which increases the heat when the current passes through the coil. At the same time, when the connecting rod 647 moves, it pushes the corresponding rack a5 to move. The rack a5 drives the third gear a4 to rotate gradually. The size of the opening of the through hole a3 in the circular plate a2 that connects with the first return pipe a7 and the support column a6 gradually increases. When the connecting rod 647 moves to the limit position, the opening of the through hole a3 that connects with the first return pipe a7 and the support column a6 reaches its maximum value. The amount of coolant passing through the first return pipe a7 at this position per unit time reaches its maximum value, completing the cooling operation of the rotor 642.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric tension machine, comprising a movable support, characterized in that, Also includes: The first tension roller and the second tension roller are respectively rotatably mounted on both sides inside the movable bracket via a drive shaft. A servo motor for driving the first tension roller to rotate is also fixedly mounted on the side wall of the movable bracket. The energy recovery mechanism is located on the outer wall of the movable support near the second tension roller. It works with the first tension roller to adjust the tension of the second tension roller and can recover the mechanical energy generated by the tensioner during braking or deceleration, convert it into electrical energy and store it in the energy storage battery. The energy recovery mechanism also includes a support cylinder and a protective cover detachably disposed at one end of the support cylinder. Multiple clearance slots are evenly provided on the outer wall of the protective cover. The support cylinder is evenly provided with a first energy recovery component, a second energy recovery component, and a third energy recovery component for cooperating with each other or operating independently to adjust the braking force on the second tension roller. The first energy recovery component, the second energy recovery component, and the third energy recovery component all adjust their own braking force on the second tension roller through a drive component, and simultaneously increase or decrease the coolant flow rate during the braking process according to the increase or decrease of the braking force through a coolant pumping component. A fourth gear is fixedly installed at one end of the drive shaft near the bearing cylinder, which is used to simultaneously drive the first energy recovery component, the second energy recovery component, and the third energy recovery component. The first energy recovery component, the second energy recovery component, and the third energy recovery component are all connected to the annular pipe, and the annular pipe is connected to the coolant storage cylinder through a pipe. The first, second, and third energy recovery components have the same structure. The first energy recovery component includes a housing that is detachably disposed inside the bearing cylinder. Inside the housing, a rotor is rotatably disposed via a bracket. One end of the rotor rotatably passes through the housing and is fixedly disposed with a first gear that meshes with and is connected to a fourth gear. Sliding sleeves are fixedly disposed on both sides of the inner wall of the housing. A permanent magnet is slidably disposed inside each sliding sleeve. A first push-pull rod is fixedly disposed on the side wall of each of the two permanent magnets.

2. The electric tension machine according to claim 1, characterized in that: The drive assembly includes an electric motor fixedly mounted on the outer wall of the protective cover. The output end of the electric motor rotates through the bearing cylinder and is connected to a drive ring assembly through a connector. The drive ring assembly includes a first arc block, a second arc block, and a third arc block connected end to end to form a complete closed loop structure. A first arc rack, a second arc rack, and a third arc rack are respectively fixedly mounted on the outer walls of the first arc block, the second arc block, and the third arc block.

3. An electric tension machine according to claim 2, characterized in that: The first, second, and third arc-shaped blocks have the same structure, and their arc-shaped sidewalls are equally divided into three regions, which are respectively the first segment region, the second segment region, and the third segment region. The first arc-shaped rack is fixedly installed in the first segment region of the first arc-shaped block, the second arc-shaped rack is fixedly installed in the second segment region of the second arc-shaped block, and the third arc-shaped rack is fixedly installed in the third segment region of the third arc-shaped block. The two ends of the third arc-shaped rack and the first arc-shaped rack abut against each other, and the first, second, and third arc-shaped blocks rotate clockwise.

4. An electric tension machine according to claim 1, characterized in that: The coolant pumping assembly includes a coolant storage tank fixedly disposed inside a carrier cylinder. A piston plate is slidably and sealed inside the coolant storage tank. A second push-pull rod is fixedly disposed at one end of the piston plate. One end of the second push-pull rod slidably passes through the coolant storage tank and is fixedly disposed on a circular plate. Protrusions are fixedly disposed on both sides of the outer wall of the circular plate away from the second push-pull rod. A spring is slidably sleeved on the outer wall of the second push-pull rod between the piston plate and the outer wall of the carrier cylinder. A drive block is fixedly disposed on one side of the circular plate and on both sides of the outer wall of the fourth gear. The positions of the two drive blocks and the two protrusions are arranged in a one-to-one correspondence.

5. An electric tension machine according to claim 1, characterized in that: A connecting rod is fixedly installed at one end of each of the two first push-pull rods. A screw rod is threaded through the middle of the connecting rod. A second gear is fixedly installed at the end of the screw rod away from the first push-pull rod. An annular heat dissipation pipe is also fixedly installed on the inner wall of the housing. A flow control component for discharging the internal coolant is installed on the outer wall of the annular heat dissipation pipe. A coolant inlet pipe is also fixedly installed at the bottom of the annular heat dissipation pipe. A second one-way valve for allowing only coolant to flow into the annular heat dissipation pipe is fixedly installed inside the coolant inlet pipe.

6. An electric tension machine according to claim 5, characterized in that: The flow control assembly includes a housing, inside which a circular plate is rotatably mounted. The circular plate has a through hole. A rotating shaft is fixedly mounted at the center of the side wall of the circular plate. The rotating shaft rotatably passes through the housing and is fixedly mounted with a third gear. The bottom of the third gear meshes with a spur rack. The spur rack is fixedly mounted on the top of a connecting rod by a support column. A first return pipe and a second return pipe, which are connected to the interior of the housing, are fixedly mounted on both sides of the outer wall of the housing. Inside the second return pipe, a first one-way valve that only allows coolant to flow out of the housing is fixedly mounted.

7. A control system for an electric tension machine, characterized in that, The electric tension machine as described in any one of claims 1-6 includes a control box and a tension sensor for acquiring cable tension information on the electric tension machine. The first energy recovery component is also provided with a position sensor. The tension information acquired by the tension sensor and the real-time position information acquired by the position sensor are sent to the control box, and the operating status of the servo motor is controlled by the control box.

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