Portable hydraulic stretcher verifier

Abstract

The application discloses a portable hydraulic stretcher calibrator, and relates to the technical field of measurement and calibration instruments. A control system is arranged on the top of four pulleys, the top of the control system is respectively provided with a magnetic suspension zero-friction calibration assembly and a kinetic energy recovery module, and the kinetic energy recovery module is arranged on one side of the outer wall of the magnetic suspension zero-friction calibration assembly. The magnetic suspension zero-friction calibration assembly is arranged, zero-contact transmission of a piston is realized through a magnetic suspension technology, nonlinear errors caused by mechanical friction can be completely eliminated, and a magnet adopts a Halbach array mode, the arrangement of magnetic poles is optimized, magnetic force lines are concentrated in a single direction, a stronger magnetic field can be output under the same magnet consumption, an optical fiber grating sensor and a plurality of sensors are fused, higher-level force value changes can be captured, and therefore, the accuracy of a calibration result is ensured. In addition, the magnetic suspension and the magnetic fluid sealing technology can avoid physical contact between the piston and the cylinder wall, and therefore, the service life of the calibrator is greatly prolonged.

Description

Technical Field

[0001] This invention relates to the field of metrology and calibration instrument technology, specifically to a portable hydraulic tensioner calibrator. Background Technology

[0002] A hydraulic tensioner is a tool used for pre-tightening and loosening bolts. It mainly relies on a hydraulic pump to provide power. The tension generated by the hydraulic system stretches the bolt within its elastic deformation zone, thereby easily loosening the nut or performing a pre-tightening operation. Hydraulic tensioners are widely used for pre-tightening and loosening large-diameter bolts, and are particularly suitable for fields such as petrochemicals, nuclear power, wind power, and hydropower.

[0003] A portable hydraulic tensioner calibrator is a specialized measuring device used to test and calibrate the performance of hydraulic tensioners. Its main purpose is to measure whether the tensile performance of hydraulic tensioners meets the usage standards, thereby ensuring their safety and accuracy in fastening operations.

[0004] However, the existing portable hydraulic tensioner calibrator has the following shortcomings:

[0005] Traditional calibrators rely solely on mechanical transmission mechanisms. The coefficient of friction is affected by factors such as pressure, speed, and lubrication conditions, leading to nonlinear deviations in force transmission and thus affecting the calibration results. Traditional calibrators cannot capture minute changes in force, resulting in less rigorous calibration results. Furthermore, they cannot compensate for interference from vibration and impact in real time. During the calibration process, they are easily affected by environmental fluctuations, and wear gradually increases over time under long-term operation, making it impossible to guarantee calibration accuracy. In addition, the single-sensor design is easily affected by various factors, and data may become invalid due to sensor failure or environmental influences, requiring repeated calibration.

[0006] Therefore, we propose a portable hydraulic tensioner calibrator to address the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a portable hydraulic tensioner calibrator and a magnetic levitation zero-friction calibration component. By using magnetic levitation technology to achieve zero-contact transmission of the piston, it can completely eliminate nonlinear errors caused by mechanical friction. Furthermore, the magnet adopts a Halbach array to optimize the magnetic pole arrangement and concentrate the magnetic lines of force in a single direction, thereby outputting a stronger magnetic field with the same amount of magnets. At the same time, the fiber optic grating sensor and multi-sensor fusion can capture higher-level force value changes, thus ensuring the accuracy of the calibration results.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a portable hydraulic tensioner calibrator, comprising a control system and four pulleys, wherein the control system is mounted on the top of the four pulleys, and a magnetic levitation zero-friction calibration component and a kinetic energy recovery module are respectively mounted on the top of the control system, and the kinetic energy recovery module is mounted on one side of the outer wall of the magnetic levitation zero-friction calibration component.

[0009] The magnetic levitation zero-friction verification component includes a set of electromagnetic coils and a set of permanent magnets. The set of electromagnetic coils is used to generate a dynamic magnetic field, and the set of permanent magnets is arranged in a Halbach array. The high magnetic field density generated by the set of permanent magnets is used to enhance the magnetic levitation force.

[0010] The kinetic energy recovery module includes two hydraulic motors, each with a generator rotatably connected to its shaft end. The two hydraulic motors are coaxially connected to the two generators and transfer mechanical energy to them.

[0011] Preferably, the top bolts of the four pulleys are fitted with housings, and a display screen, a button, and a switch are respectively installed on one side of the outer wall of the housings. The bottom of the housings is bolted to a support platform, and a hydraulic tensioner is installed on the top of the support platform.

[0012] Preferably, the magnetic levitation zero-friction calibration component further includes a cylinder bottom and two seals. Four through bolts are inserted into the top of the cylinder bottom, and the top of the four through bolts is bolted to a cylinder head. A cylinder barrel is fixedly connected between the cylinder head and the outer wall of the cylinder bottom.

[0013] Preferably, the inner surface of the cylinder is provided with a set of grooves, and the electromagnetic coil is embedded on the outer surface of the set of grooves. A magnetic fluid annular groove is provided on one side of the outer wall of both seals. The interior of the two magnetic fluid annular grooves is filled with magnetic fluid, and the magnetic fluid is used to form a dynamic sealing layer.

[0014] Preferably, the inner surfaces of the two seals are connected by an annular fixing sleeve, and the outer surface of the annular fixing sleeve is respectively provided with two lip seals and a sensor compartment.

[0015] Preferably, the top and bottom of the annular fixing sleeve are respectively connected to the bottom and top of a corresponding sealing element. A Hall sensor and an IMU sensor are installed inside the sensor compartment. The outer surface of the annular fixing sleeve is connected to the inner surface of a set of permanent magnets. A piston rod is fixedly connected to the top of one of the sealing elements, and the piston rod is made of SiC ceramic material.

[0016] Preferably, a guide sleeve is fitted on the outer surface of the piston rod, and the outer surface of the guide sleeve is connected to the inner surface of the cylinder head. A magnetostrictive displacement sensor is installed on the outer surface of the piston rod. A fiber optic grating tension sensor is rigidly connected to the top of the piston rod. A threaded rod is fixedly connected to the top of the fiber optic grating tension sensor, and the threaded rod is threadedly connected to the bottom of the hydraulic tensioner. The bottom of the cylinder is connected to the top of the support platform. A set of electromagnetic coils is covered with a shell, and the inner surface diameter of the shell is equal to the inner surface diameter of the cylinder.

[0017] Preferably, the kinetic energy recovery module further includes two fixing components and two support plates. The outer sides of the two fixing components are connected to the outer side of a corresponding hydraulic motor. The top of the two support plates are connected to a support base. One support plate is bolted to the bottom of the cylinder head, and the other support plate is bolted to the top of the cylinder bottom.

[0018] Preferably, the tops of the two support bases are connected to the outer surface of a corresponding generator, and both sides of the outer walls of the two hydraulic motors are connected to interfaces, wherein one end of the outer wall of each interface is fixedly connected to an oil inlet, and one oil inlet is connected to one side of the outer wall of the cylinder head, and the other oil inlet is connected to the bottom of the cylinder.

[0019] Preferably, one end of the outer wall of one of the two interfaces is fixedly connected to an oil passage pipe, one side of the outer wall of one of the fixing members is connected to one side of the outer wall of the cylinder head, and one side of the outer wall of the other fixing member is connected to one side of the outer wall of the cylinder bottom.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, by setting up a magnetic levitation zero-friction calibration component, the piston achieves zero-contact transmission through magnetic levitation technology, which can completely eliminate nonlinear errors caused by mechanical friction. Furthermore, the magnet adopts a Halbach array to optimize the magnetic pole arrangement and concentrate the magnetic lines of force in a single direction, which can output a stronger magnetic field with the same amount of magnets. At the same time, the fiber optic grating sensor and multi-sensor fusion can capture higher-level force value changes, thereby ensuring the accuracy of the calibration results. In addition, magnetic levitation and magnetohydrodynamic sealing technologies can avoid physical contact between the piston and the cylinder wall, thereby significantly extending the service life of the calibration instrument.

[0022] 2. In this invention, by setting up a kinetic energy recovery module, when the piston moves in the forward or reverse direction, the two oil inlets can synchronously recover hydraulic energy from the hydraulic motor and generator. The hydraulic motor and generator can directly convert this energy into electrical energy, directly reducing the energy consumption of the external power supply. The coordinated work of the hydraulic motor and generator can respond to the instantaneous pressure changes on both sides of the piston in real time, and adjust the power generation through feedback control, which can help maintain the zero-friction state of the magnetic levitation system and ensure that the friction force has zero impact on the measurement results during the calibration process. Attached Figure Description

[0023] Figure 1 This is a perspective view of the main structure of a portable hydraulic tensioner calibrator according to the present invention.

[0024] Figure 2 This is a bottom-view perspective view of the structure of a portable hydraulic tensioner calibrator according to the present invention.

[0025] Figure 3 This is a three-dimensional cross-sectional view of a portable hydraulic tensioner calibrator according to the present invention.

[0026] Figure 4 This is a three-dimensional view of the control system structure in a portable hydraulic tensioner calibrator according to the present invention;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the magnetic levitation zero-friction calibration component in a portable hydraulic tensioner calibrator according to the present invention.

[0028] Figure 6 This is a schematic diagram of the installation positions of the seal, the magnetofluid annular groove, and the permanent magnet in a portable hydraulic tensioner calibrator according to the present invention.

[0029] Figure 7 This is an exploded view of the magnetic levitation zero-friction calibration component in a portable hydraulic tensioner calibrator according to the present invention.

[0030] Figure 8 This invention relates to a portable hydraulic tensioner calibrator. Figure 7 Enlarged view of structure A in the image;

[0031] Figure 9 This is a three-dimensional structural view of the kinetic energy recovery module in a portable hydraulic tensioner calibrator according to the present invention.

[0032] Figure 10 This is a schematic diagram showing the installation positions of the hydraulic motor and generator in a portable hydraulic tensioner calibrator according to the present invention.

[0033] In the diagram: 100, pulley; 200, housing; 300, control system; 301, display screen; 302, button; 303, switch; 400, support platform; 500, magnetic levitation zero-friction calibration assembly; 501, cylinder bottom; 502, through bolt; 503, cylinder barrel; 504, cylinder head; 505, electromagnetic coil; 506, seal; 507, magnetohydrodynamic annular groove; 508, lip seal; 509, permanent magnet; 510, annular ring. 511. Fixed sleeve; 512. Sensor compartment; 513. Piston rod; 514. Guide sleeve; 515. Magnetostrictive displacement sensor; 516. Fiber optic tension sensor; 517. Threaded rod; 600. Hydraulic tensioner; 700. Kinetic energy recovery module; 701. Fixture; 702. Hydraulic motor; 703. Interface; 704. Oil inlet; 705. Oil pipeline; 706. Generator; 707. Support base; 708. Support plate. Detailed Implementation

[0034] 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.

[0035] In embodiments of the present invention, please refer to the appendix. Figure 1 -Appendix Figure 3As shown, this invention provides a technical solution: a portable hydraulic tensioner calibrator, including a control system 300 and four pulleys 100. The control system 300 is mounted on top of the four pulleys 100. The four pulleys 100 enable the entire portable hydraulic tensioner calibrator to rotate freely 360°, allowing even a single person to easily push the device. The four pulleys 100 are evenly distributed at the four corners of the device's bottom, forming a triangular stability layout to ensure the device's center of gravity is balanced and avoid the risk of tipping over. The control system 300 integrates control circuitry, a power management module, a battery pack, and other components, and can directly drive the magnetic levitation system, sensors, and calibration actuators. Magnetic levitation zero-friction calibration components 50 are respectively mounted on the top of the control system 300. The system includes a kinetic energy recovery module 700, which is installed on one side of the outer wall of the magnetic levitation zero-friction calibration component 500. The magnetic levitation zero-friction calibration component 500 can achieve zero-contact transmission of the piston through magnetic levitation technology, which can completely eliminate nonlinear errors caused by mechanical friction. At the same time, the fiber optic tension sensor 515 and multi-sensor fusion can capture higher-level force value changes, thereby ensuring the accuracy of the calibration results. In addition, in the kinetic energy recovery module 700, the hydraulic motor 702 and the generator 706 synchronously recover hydraulic energy and adjust the power generation through the control system 300, which can help maintain the zero-friction state of the magnetic levitation system and ensure that the friction force has zero impact on the measurement results during the calibration process.

[0036] Specifically, in the portable hydraulic tensile tester calibrator, the entire device is first moved to the designated calibration area by four pulleys 100. Then, the control system 300 controls the magnetic levitation zero-friction calibration component 500 to target the hydraulic tensile tester 600. The piston achieves zero-contact transmission through magnetic levitation technology. At the same time, multiple sensors are fused to ensure the accuracy of the calibration results. When the piston moves in the forward or reverse direction, the magnetic levitation zero-friction calibration component 500 can synchronously recover hydraulic energy using the kinetic energy recovery module 700. The hydraulic motor 702 and generator 706 can directly convert this energy into electrical energy, directly reducing the energy consumption of the external power supply. The control system 300 adjusts the power generation to help maintain the zero-friction state of the magnetic levitation system, ensuring that friction has zero impact on the measurement results during the calibration process.

[0037] In some embodiments, according to Figures 1-3 as well as Figures 5-8 As shown, the magnetic levitation zero-friction verification component 500 includes a set of electromagnetic coils 505 and a set of permanent magnets 509. The set of electromagnetic coils 505 is used to generate a dynamic magnetic field, and the set of permanent magnets 509 is arranged in a Halbach array. The high magnetic field density generated by the set of permanent magnets 509 is used to enhance the magnetic levitation force.

[0038] The magnetic levitation zero-friction calibration component 500 also includes a cylinder bottom 501 and two seals 506. Four through bolts 502 are inserted into the top of the cylinder bottom 501. The top of the four through bolts 502 is bolted to a cylinder head 504. A cylinder barrel 503 is fixedly connected between the cylinder head 504 and the outer wall of the cylinder bottom 501.

[0039] The inner surface of the cylinder 503 is provided with a set of grooves, and the electromagnetic coil 505 is embedded in the outer surface of the set of grooves. The outer wall of the two seals 506 is provided with a magnetic fluid annular groove 507. The interior of the two magnetic fluid annular grooves 507 is filled with magnetic fluid, and the magnetic fluid is used to form a dynamic sealing layer.

[0040] The inner surfaces of the two seals 506 are connected by an annular fixing sleeve 510, and the outer surface of the annular fixing sleeve 510 is respectively equipped with two lip seals 508 and a sensor compartment 511.

[0041] The top and bottom of the annular fixing sleeve 510 are respectively connected to the bottom and top of a corresponding sealing element 506. A Hall sensor and an IMU sensor are installed inside the sensor compartment 511. The outer surface of the annular fixing sleeve 510 is connected to the inner surface of a set of permanent magnets 509. A piston rod 512 is fixedly connected to the top of one of the sealing elements 506, and the piston rod 512 is made of SiC ceramic material.

[0042] A guide sleeve 513 is fitted on the outer surface of the piston rod 512. The outer surface of the guide sleeve 513 is connected to the inner surface of the cylinder head 504. A magnetostrictive displacement sensor 514 is installed on the outer surface of the piston rod 512. A fiber optic grating tension sensor 515 is rigidly connected to the top of the piston rod 512. A threaded rod 516 is fixedly connected to the top of the fiber optic grating tension sensor 515. The threaded rod 516 is threadedly connected to the bottom of the hydraulic tensioner 600. The bottom of the cylinder bottom 501 is connected to the top of the support platform 400. A set of electromagnetic coils 505 is covered by a shell. The inner surface diameter of the shell is equal to the inner surface diameter of the cylinder 503.

[0043] The overall effect of this embodiment is as follows: A complete magnetic levitation zero-friction calibration assembly 500 is formed using the aforementioned components. When the hydraulic tensioner 600 needs to be calibrated, the operator can manually connect the hydraulic tensioner 600 to the threaded rod 516 at the bottom. After the hydraulic tensioner 600 is fully fixed to the top of the magnetic levitation zero-friction calibration assembly 500, the entire calibration instrument is then connected to an external power source. Next, the oil inlet 704 is connected to the oil pipeline 705 through the kinetic energy recovery module 700. At this time, the operator manually turns on the switch 303, and the entire device... Successful operation is achieved. At this point, the user inputs calibration parameters, such as maximum pressure, displacement stroke, and number of test cycles, through the control system 300. The high-pressure pump in the control system 300 then inputs a specified pressure to the magnetic levitation zero-friction calibration component 500 to simulate actual working conditions. The piston in the calibrator achieves magnetic levitation under the action of a set of permanent magnets 509. Furthermore, this set of permanent magnets 509 is arranged in a Halbach array. Under this arrangement, with the same amount of magnets, the magnetic field strength can be increased, and the energy consumption of the electromagnetic coil 505 can be significantly reduced, while avoiding damage to external equipment. To eliminate magnetic interference, the strong magnetic field of the permanent magnet 509 interacts with the electromagnetic coil 505 to fully support piston levitation, eliminating the mechanical contact friction of traditional hydraulic cylinders, thereby achieving ultra-precise force output and meeting high-precision calibration requirements. Secondly, a set of independent electromagnetic coils 505, through data detected by Hall sensors and IMU sensors inside the sensor chamber 511, forms a closed-loop control system, dynamically adjusting the levitation force to compensate for external load changes. The Hall sensors monitor the magnetic field distribution generated by the electromagnetic coils 505 in the magnetic levitation system, providing feedback on the actual strength of the magnetic field to ensure consistency with the control target. Simultaneously, if the magnetic field deviates due to temperature changes or current fluctuations during piston levitation, the Hall sensors can trigger a compensation mechanism through the control system 300 to dynamically adjust the current of the electromagnetic coils 505, maintaining the stability of the magnetic levitation. Furthermore, the IMU sensor, through its internal accelerometer, captures the vibration spectrum of the piston movement in real time to determine the stability of the magnetic levitation system. The gyroscope in the IMU sensor can monitor the tilt angle and rotational motion of the piston during levitation, providing attitude correction data for the control system 300. The piston rod 512 is made of SiC. Made of ceramic, it possesses extremely high tensile strength, high temperature resistance, and a low coefficient of thermal expansion, maintaining structural stability even under high pressure or extreme temperature environments. Compared to stainless steel piston rods 512, this reduces the risk of breakage. During calibration, the magnetostrictive displacement sensor 514, through its built-in magnetostrictive waveguide, fixes a movable magnetic ring to the outer surface of the piston. The interaction between the magnetostrictive waveguide and the movable magnetic ring enables dynamic measurement of the piston's absolute position. The control system 300 tracks the positional changes of the magnetic ring on the waveguide in real time and outputs precise displacement data. Furthermore, a fiber optic grating tension sensor 515 is integrated at the end of the piston rod 512.The calibrator is rigidly connected to the tensioner being calibrated via a threaded connection. A fiber optic grating tension sensor 515 measures the wavelength change of the optical fiber when it is under stress to sense tension or pressure. A Hall effect sensor and an IMU sensor work in conjunction with a magnetostrictive displacement sensor 514 and the fiber optic grating tension sensor 515 to construct a multi-physical, multi-dimensional sensing network. This significantly improves the accuracy of the calibrator in evaluating the performance of the hydraulic tensioner 600 and its adaptability to complex working conditions, providing key technical support for the reliable application of zero-friction hydraulic technology.

[0044] The magnetic levitation zero-friction calibration component 500 achieves zero-contact piston transmission through magnetic levitation technology, which can completely eliminate nonlinear errors caused by mechanical friction. Furthermore, the permanent magnet 509 adopts a Halbach array to optimize the magnetic pole arrangement and concentrate the magnetic lines of force in a single direction, thereby outputting a stronger magnetic field with the same amount of magnets. At the same time, the fiber optic grating tension sensor 515 and the fusion of multiple sensors can capture higher-level force changes, thus ensuring the accuracy of the calibration results. In addition, magnetic levitation and magnetohydrodynamic sealing technologies can avoid physical contact between the piston and the cylinder wall, thereby significantly extending the service life of the calibrator.

[0045] according to Figures 1-3 as well as Figures 9-10 As shown, the kinetic energy recovery module 700 includes two hydraulic motors 702, and the shaft ends of the two hydraulic motors 702 are rotatably connected to generators 706. The hydraulic motors 702 convert the kinetic energy of hydraulic oil into rotational mechanical energy, which is transmitted to the generators 706 through a high-precision coupling. The two hydraulic motors 702 are coaxially connected to the two generators 706 and transmit mechanical energy to the two generators 706.

[0046] The kinetic energy recovery module 700 also includes two fixing parts 701 and two support plates 708. The outer side of each of the two fixing parts 701 is connected to the outer side of a corresponding hydraulic motor 702. The top of each of the two support plates 708 is connected to a support base 707. One of the support plates 708 is bolted to the bottom of the cylinder head 504, and the other support plate 708 is bolted to the top of the cylinder bottom 501.

[0047] The tops of the two support bases 707 are connected to the outer surface of a corresponding generator 706. Both sides of the outer wall of the two hydraulic motors 702 are connected to interfaces 703. One end of the outer wall of each interface 703 is fixedly connected to an oil inlet 704. One oil inlet 704 is connected to one side of the outer wall of the cylinder head 504, and the other oil inlet 704 is connected to the cylinder bottom 501.

[0048] One end of the outer wall of two of the interfaces 703 is fixedly connected to an oil pipe 705. One side of the outer wall of one of the fasteners 701 is connected to one side of the outer wall of the cylinder head 504, and one side of the outer wall of the other fastener 701 is connected to one side of the outer wall of the cylinder bottom 501.

[0049] The overall effect of this embodiment is as follows: A complete kinetic energy recovery module 700 is formed using the aforementioned components. When the magnetic levitation zero-friction verification component 500 needs to verify the hydraulic tensioner 600, the verification instrument is connected to the hydraulic tensioner 600 under test via a threaded rod 516. The magnetic levitation zero-friction verification component 500 is activated by the control system 300. The Halbach permanent magnet array 509 and the electromagnetic coil 505 work together to levitate the piston and bring it into a zero-friction state. Simultaneously, the hydraulic system begins to pressurize, and hydraulic oil flows through the oil pipeline 705. The hydraulic oil enters the hydraulic tensioner 600 through the cylinder bottom 501. Before entering the cylinder bottom 501 through the oil passage 705, the hydraulic oil passes through one of the hydraulic motors 702. After entering the hydraulic motor 702 through one of the ports 703, the hydraulic motor 702 rotates under the drive of high-pressure hydraulic oil. The mechanical energy is converted into electrical energy through a coaxially connected generator 706. The generator 706 receives the mechanical torque of the hydraulic motor 702 through a coupling, efficiently converting mechanical energy into electrical energy. The electrical energy output by the generator 706 is converted into grid-compatible voltage and frequency by an inverter. When the piston returns to its original position, hydraulic oil, due to inertia and the reverse pressure of the hydraulic system, is forced from the piston chamber through the check valve into the inlet 704 of the hydraulic motor 702. Driven by the high-pressure hydraulic oil, the hydraulic motor 702 rotates, converting mechanical energy into electrical energy through the coaxially connected generator 706. The generator 706 receives the mechanical torque of the hydraulic motor 702 via a coupling, efficiently converting mechanical energy into electrical energy. Once the piston's return stroke is complete, the hydraulic system enters a stationary state, and the check valve closes, preventing reverse flow of hydraulic oil. The control system 300 prepares for the next loading. With the energy recovery module 700 in place, when the piston moves in the forward or reverse direction, the two oil inlets can synchronously recover hydraulic energy through the hydraulic motor 702 and generator 706. The hydraulic motor 702 and generator 706 can directly convert this energy into electrical energy, directly reducing the energy consumption of the external power supply. The coordinated work of the hydraulic motor 702 and generator 706 can respond in real time to the instantaneous pressure changes on both sides of the piston, and adjust the power generation through the control system 300. This can help maintain the zero-friction state of the magnetic levitation system and ensure that the friction force has zero impact on the measurement results during the calibration process.

[0050] according to Figures 1-3As shown, the top of the four pulleys 100 is bolted to the housing 200. The outer wall of the housing 200 is respectively equipped with a display screen 301, a button 302, and a switch 303. The bottom of the housing 200 is bolted to a support platform 400. The top of the support platform 400 is equipped with a hydraulic tensioner 600.

[0051] The overall effect of this embodiment is as follows: First, the operator can move the entire calibrator to the designated testing area using four of the pulleys 100. The pulleys 100 are evenly distributed at the four corners of the bottom of the device, forming a triangular stability layout to ensure the balance of the device's center of gravity and avoid the risk of tipping over. Second, the pulleys 100 are equipped with brake locks. When the entire calibrator moves to the designated testing area, the four pulleys 100 are quickly locked to ensure absolute stability when the entire device is stationary. Furthermore, the top of the four pulleys 100 is bolted to the housing 200. A display screen 301, a button 302, and a switch 303 are respectively installed on one side of the outer wall of the housing 200. The control system 300 controls the display screen 301 and the button... Key control units such as switch 302 and switch 303 are centrally located on the front of the equipment, enabling "one screen, one control" operation, reducing the need for external wiring and improving portability. First, the operator manually presses switch 303 to start the entire calibrator. Then, the hydraulic tensioner 600 is fully fixed to the top of the magnetic levitation zero-friction calibration component 500. At this point, the operator inputs calibration parameters, such as maximum pressure, displacement stroke, and number of test cycles, through the control system 300's button 302 and display screen 301. The high-pressure pump in the control system 300 inputs the specified pressure to the magnetic levitation zero-friction calibration component 500 to simulate actual working conditions. The magnetic levitation zero-friction calibration component 500 internally... All sensors are in working order, and their numerical parameters are displayed intuitively to the operator on the display screen 301. During the calibration process, the display screen 301 shows the calibration data such as force, displacement, and pressure in real time, helping the operator to quickly judge the equipment status. While the magnetic levitation zero-friction calibration component 500 is calibrating, the hydraulic system begins to pressurize. Hydraulic oil enters through the oil pipe 705 and then through the cylinder bottom 501. Before entering the cylinder bottom 501 through the oil pipe 705, the hydraulic oil passes through one of the hydraulic motors 702. After the hydraulic oil enters the hydraulic motor 702 through one of the interfaces 703, the hydraulic motor 702 rotates under the drive of high-pressure hydraulic oil, and is connected coaxially. The generator 706 converts mechanical energy into electrical energy. The power generation is adjusted by the control system 300, which helps maintain the zero-friction state of the magnetic levitation system and ensures that the friction force has zero impact on the measurement results during the calibration process. After the entire portable hydraulic tensioner 600 calibrator is calibrated, the hydraulic system enters a static state after the piston has completed its return stroke. The one-way valve closes to prevent the hydraulic oil from flowing backward. The control system 300 prepares for the next loading. At this time, the staff removes the hydraulic tensioner 600 that was calibrated and shuts down the entire device by manually pressing the switch 303. Then, the staff moves the entire calibrator to a safe area for storage using the four pulleys 100 in preparation for the next calibration.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable hydraulic tensioner calibrator, comprising a control system (300), four pulleys (100), and a hydraulic tensioner (600), characterized in that: The control system (300) is installed on the top of the four pulleys (100). The top of the control system (300) is respectively equipped with a magnetic levitation zero friction verification component (500) and a kinetic energy recovery module (700), and the kinetic energy recovery module (700) is installed on one side of the outer wall of the magnetic levitation zero friction verification component (500). The magnetic levitation zero-friction verification component (500) includes a cylinder bottom (501), a cylinder barrel (503), a set of electromagnetic coils (505), two seals (506), a set of permanent magnets (509), and a fiber optic grating tension sensor (515). The set of electromagnetic coils (505) is used to generate a dynamic magnetic field. The set of permanent magnets (509) is arranged in a Halbach array, and the high magnetic field density generated by the set of permanent magnets (509) is used to enhance the magnetic levitation force. The top of the fiber optic grating tension sensor (515) is fixedly connected to a threaded rod (516), and the threaded rod (516) is threadedly connected to the bottom of the hydraulic tensioner (600). The inner surface of the cylinder (503) is provided with a set of grooves, and the electromagnetic coil (505) is embedded in the outer surface of the set of grooves. The outer wall of the two seals (506) is provided with a magnetic fluid annular groove (507). The interior of the two magnetic fluid annular grooves (507) is filled with magnetic fluid, and the magnetic fluid is used to form a dynamic sealing layer. The inner surfaces of the two seals (506) are connected to an annular fixing sleeve (510). The outer surface of the annular fixing sleeve (510) is connected to the inner surface of a set of permanent magnets (509). The kinetic energy recovery module (700) includes two hydraulic motors (702), and the shaft ends of the two hydraulic motors (702) are rotatably connected to generators (706). The two hydraulic motors (702) and the two generators (706) are coaxially connected and transmit mechanical energy to the two generators (706). Both sides of the outer walls of the two hydraulic motors (702) are connected to interfaces (703), and one end of the outer wall of the two interfaces (703) is fixedly connected to an oil pipe (705). The hydraulic oil will enter the hydraulic tensioner (600) through the bottom of the cylinder (501) via the oil pipe (705). Before the hydraulic oil enters the bottom of the cylinder (501) through the oil pipe (705), it will pass through one of the hydraulic motors (702). After the hydraulic oil enters the hydraulic motor (702) through one of the interfaces (703), the hydraulic motor (702) will rotate under the drive of high-pressure hydraulic oil. The mechanical energy will be converted into electrical energy through the coaxially connected generator (706). The generator (706) receives the mechanical torque of the hydraulic motor (702) through the coupling and efficiently converts the mechanical energy into electrical energy.

2. The portable hydraulic tensioner calibrator according to claim 1, characterized in that: The top bolts of the four pulleys (100) are bolted to a housing (200). A display screen (301), a button (302), and a switch (303) are respectively installed on one side of the outer wall of the housing (200). The bottom of the housing (200) is bolted to a support platform (400). The top of the support platform (400) is installed with a hydraulic tensioner (600).

3. The portable hydraulic tensioner calibrator according to claim 1, characterized in that: Four through bolts (502) are inserted into the top of the cylinder bottom (501), and the top of the four through bolts (502) is bolted to the cylinder head (504). The cylinder barrel (503) is fixedly connected between the cylinder head (504) and the outer wall of the cylinder bottom (501).

4. The portable hydraulic tensioner calibrator according to claim 3, characterized in that: Two lip-shaped sealing rings (508) and a sensor compartment (511) are respectively installed on the outer surface of the annular fixing sleeve (510).

5. The portable hydraulic tensioner calibrator according to claim 4, characterized in that: The top and bottom of the annular fixing sleeve (510) are respectively connected to the bottom and top of a corresponding sealing element (506). A Hall sensor and an IMU sensor are installed inside the sensor compartment (511). A piston rod (512) is fixedly connected to the top of one of the sealing elements (506), and the piston rod (512) is made of SiC ceramic material.

6. The portable hydraulic tensioner calibrator according to claim 5, characterized in that: The outer surface of the piston rod (512) is fitted with a guide sleeve (513), the outer surface of the guide sleeve (513) is connected to the inner surface of the cylinder head (504), the outer surface of the piston rod (512) is fitted with a magnetostrictive displacement sensor (514), the top of the piston rod (512) is rigidly connected to the bottom of a fiber optic tension sensor (515), the bottom of the cylinder bottom (501) is connected to the top of the support platform (400), and a set of electromagnetic coils (505) is covered with a shell, and the inner surface diameter of the shell is equal to the inner surface diameter of the cylinder (503).

7. The portable hydraulic tensioner calibrator according to claim 3, characterized in that: The kinetic energy recovery module (700) also includes two fixing parts (701) and two support plates (708). The outer sides of the two fixing parts (701) are connected to the outer sides of a corresponding hydraulic motor (702). The tops of the two support plates (708) are connected to support bases (707). One support plate (708) is bolted to the bottom of the cylinder head (504), and the other support plate (708) is bolted to the top of the cylinder bottom (501).

8. The portable hydraulic tensioner calibrator according to claim 7, characterized in that: The tops of the two support bases (707) are connected to the outer surface of a corresponding generator (706), wherein one end of the outer wall of the two interfaces (703) is fixedly connected to an oil inlet (704), and one oil inlet (704) is connected to one side of the outer wall of the cylinder head (504), and the other oil inlet (704) is connected to the cylinder bottom (501).

9. The portable hydraulic tensioner calibrator according to claim 8, characterized in that: One of the outer walls of one of the fasteners (701) is connected to one of the outer walls of the cylinder head (504), and the other fastener (701) is connected to one of the outer walls of the cylinder bottom (501).

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