Interphase spacer bar wiggling experiment connecting tool and experimental device

Abstract

This invention provides a connection fixture and experimental device for a phase-to-phase spacer galloping experiment, belonging to the technical field of power fittings and transmission line testing. The connection fixture includes a fixing part, one end of which is used to clamp and fix the end of the phase-to-phase spacer; and a torsion part, fixedly connected to the end of the fixing part away from the phase-to-phase spacer. The torsion part includes a first movable disc, a second movable disc, a connecting post, and a braided metal rope. The edges of the first and second movable discs are respectively provided with several corresponding connecting holes along the circumferential direction, and the braided metal rope passes through the corresponding connecting holes. The braided metal rope is configured to apply a constraint and restoring force to the first and second movable discs when they experience different axial offsets or relative torsion. This invention provides multi-degree-of-freedom adaptability for torsion and oscillation through the cooperation of the movable ball head and the spherical groove. The flexible constraint of the braided metal rope replaces the traditional rigid limit, reducing the occurrence of jamming and uneven wear problems.

Description

Technical Field

[0001] This invention belongs to the field of power fittings and transmission line testing technology, specifically relating to a phase-to-phase spacer bar galloping test connection fixture and test device. Background Technology

[0002] With the rapid development of ultra-high voltage and extra-high voltage transmission lines, phase-to-phase spacers, as key protective hardware for suppressing conductor galloping and preventing phase-to-phase short circuits, are crucial to the safety and stability of the power grid. In the research and testing of phase-to-phase spacers, simulated galloping experiments must be conducted to verify the product's fatigue resistance and structural strength under dynamic alternating loads.

[0003] However, in actual transmission line operation, conductor galloping is a complex spatial motion process. The phase spacers not only bear axial tensile and compressive loads, but also experience significant small-angle torsional and multi-directional oscillating deformation. This torsion and oscillation are caused by the phase difference resulting from the asynchronous movement of the conductors at both ends of the phase spacer, and are inherent mechanical characteristics of its operation.

[0004] refer to Figure 1-2 In existing simulated galloping experimental techniques, hydraulic actuators or vibration tables are typically used as vibration sources, and the spacer bar is driven to move through connecting fixtures. However, the commonly used connecting fixtures mostly adopt traditional rigid connection structures (such as ordinary pin connections, rigid clamps, etc.). Because their connection nodes lack the ability to adapt to torsional deformation, when the spacer bar undergoes natural small-angle torsion or oscillation during the experiment, the connection part becomes over-constrained, causing jamming and uneven wear problems at the connection between the spacer bar and the connecting fixture.

[0005] This not only accelerates the wear and tear of the experimental equipment, but more seriously, the additional frictional resistance torque generated by the jamming will directly act on the end of the interphase spacer, changing the original force boundary conditions of the specimen. The component needs to overcome the inertial impact with a higher peak value and withstand a stronger multi-degree-of-freedom coupling effect. The torsional stress of the interphase spacer core is severely distorted at this time, making it impossible to truly reproduce the torsional and oscillating behavior of the interphase spacer under operating conditions, and making it impossible to relatively realistically assess the weak link of the torsional stress of the interphase spacer core. This further affects the accuracy and validity of the experimental data. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that, in the existing simulated galloping experiment, the connection node between the connecting fixture and the experimental spacer rod hardware lacks the ability to adapt to torsional deformation, resulting in over-constraint and thus failing to simulate the small-amplitude torsional state that actually exists in the spacer rod. The present invention provides a connecting fixture and experimental device for the galloping experiment of interphase spacer rods.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: Firstly, this application provides a connecting fixture for an interphase spacer bar galloping experiment, including... The fixing part has one end for clamping and fixing the end of the interphase spacer bar; The torsion part is fixedly connected to the end of the fixed part away from the phase spacer bar; the torsion part includes a first movable disc, a second movable disc, a connecting post, and a braided metal rope. One side of the second movable disk is connected to the vibration source; one end of the connecting column is vertically fixed at the center of the other side; the end of the connecting column away from the second movable disk moves through the center of the first movable disk and forms a movable ball head; the first movable disk and the fixed part are fixedly connected to form a limiting movable chamber; the limiting movable chamber is configured to accommodate the movable ball head, and allows the movable ball head to adaptively engage with the first movable disk in a spherical contact fit or a gap disengagement fit when the first movable disk and the second movable disk are relatively displaced; The edges of the first movable disc and the second movable disc are respectively provided with a plurality of one-to-one corresponding connection holes along the circumferential direction, and the braided metal rope is passed through the corresponding connection holes; The braided metal rope is configured to apply a constraint restoring force to the first and second movable discs when they experience different axial offsets or relative torsion.

[0008] In some specific embodiments, the fixing part includes a first clamping fixing member and a second clamping fixing member, which, when engaged, form a clamping cavity for clamping the end of the interphase spacer bar; the first clamping fixing member and the second clamping fixing member are detachably fixedly connected by bolts.

[0009] In some specific embodiments, one side of the second movable disc is connected to the vibration source through an adjustment part; the adjustment part includes a first adjustment member and a second adjustment member; the first adjustment member and the second adjustment member are provided with a plurality of adjustment holes spaced apart along their respective length directions; the first adjustment member and the second adjustment member are detachably connected by connectors passing through at least two sets of corresponding adjustment holes.

[0010] In some specific embodiments, the connecting member is a fastening bolt; the first adjusting member is a plate-shaped member with a rectangular cross-section; the second adjusting member is a fork-shaped structure with a single-sided opening and two opposing fork arms; the first adjusting member is inserted into the opening of the fork-shaped structure and slides with the two fork arms, and the length adjustment and locking are achieved by the fastening bolt passing through the aligned adjusting hole.

[0011] In some specific embodiments, the braided metal rope is a single continuous rope; the single continuous rope is alternately threaded through the connecting holes on the edge of the first movable disc and the corresponding connecting holes on the edge of the second movable disc, and after passing through all the connecting holes, the first end and the last end of the single continuous rope are connected to form a closed loop.

[0012] In some specific embodiments, the braided metal rope comprises multiple independent rope segments, the number of which is the same as the logarithm of the connecting holes; the first end of each rope segment is inserted into and fixed in one of the connecting holes on the edge of the first movable disc, and the second end of each rope segment is inserted into and fixed in one of the connecting holes on the edge of the second movable disc that corresponds axially to the connecting hole.

[0013] In some specific embodiments, the center of the first movable disc is provided with a spherical groove that matches the outer spherical surface of the movable ball head; a wear-resistant bushing is embedded in the spherical groove; the wear-resistant bushing and the spherical groove are fixed by interference fit or adhesive bonding.

[0014] In some specific embodiments, the wear-resistant bushing is made of one of tin bronze, aluminum bronze, or polyoxymethylene.

[0015] In some specific embodiments, the connecting column and the second movable disk are integrally formed.

[0016] Secondly, this application provides a phase-spacer bar galloping test apparatus, including the aforementioned phase-spacer bar galloping test connecting fixture.

[0017] Compared with existing technologies, this invention provides ample multi-degree-of-freedom adaptability for torsion and oscillation through the cooperation of the movable ball head and the spherical groove. The flexible constraint of the braided metal rope replaces the traditional rigid limit, and the connection node no longer over-constrains the natural torsional motion of the specimen, greatly reducing the occurrence of jamming and uneven wear problems, while also preventing excessive torsion and deviation from the experimental purpose. Utilizing extremely small spherical frictional resistance torque and progressive flexible constraint force, the force boundary conditions at the ends of the specimen truly reflect the elastic constraints provided by the conductors at both ends of the interphase spacer during operation. The phase difference and amplitude deviation between the experimentally applied load waveform and the actual response of the specimen are controlled within a small range, which can effectively verify the force operation of the core rod under asynchronous torsion at both ends of the interphase spacer, and ensure the accuracy and validity of other corresponding experimental data. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] Figure 1A schematic diagram of the continuous reciprocating motion of the spacer bars in a simulated dancing experiment, following a preset dancing waveform. Figure 2 : Schematic diagram of the wear and tear structure at the connection between the phase spacer and the connecting tool; Figure 3 : Schematic diagram of the overall structure of the present invention; Figure 4 : Exploded structural diagram of the present invention; Figure 5 : Schematic diagram of the cross-sectional structure of the torsion section of the present invention; Figure 6 : Schematic diagram of the bolt structure of this invention; Figure 7 : One of the schematic diagrams of the rope end connection structure in Embodiment 2 of the present invention; Figure 8 : Schematic diagram of the rope end connection structure of embodiment 2 of the present invention (second one); The components include: a fixing part 1, a first clamping fixing part 11, a second clamping fixing part 12, a clamping cavity 13, a bolt 14, a pin hole 15, a closed pin 16, a torsion part 2, a first movable disc 21, a second movable disc 22, a connecting column 23, a braided metal rope 24, a movable ball head 25, a limiting movable chamber 26, a spherical groove 27, an adjustment part 3, a first adjusting part 31, a second adjusting part 32, an adjusting hole 33, a connecting part 34, a fork arm 35, and a connecting hole 4. Detailed Implementation

[0020] To better understand the present invention, the following embodiments further illustrate the content of the invention, but the scope of protection of the present invention is not limited to the following embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0021] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0023] Example 1,

[0024] This application provides a connecting fixture for a phase-interval bar dancing experiment, including a fixing part 1, a torsion part 2, and an adjustment part 3.

[0025] The fixing part 1 has one end for clamping and fixing the end of the interphase spacer bar; the fixing part 1 includes a first clamping fixing member 11 and a second clamping fixing member 12, which, when engaged, form a clamping cavity 13 for clamping the end of the interphase spacer bar; the first clamping fixing member 11 and the second clamping fixing member 12 are detachably fixedly connected by bolts 14. A double-half structure with engagement is adopted, and the bolts 14 apply a preload evenly distributed along the circumference, so that the inner wall of the clamping cavity 13 forms a uniform radial clamping force on the end fitting of the spacer bar.

[0026] During the galloping experiment, the interphase spacer bars are continuously in a state of vibration, oscillation, and torsion, making the bolt 14 connection prone to loosening under alternating loads. Therefore, a pin hole 15 is provided at the end of the bolt 14 after the nut extends out, and a closed pin 16 passes through the pin hole to prevent the nut from loosening. The closed pin 16 passing through the pin hole 15 at the end of the bolt 14 forms a rigid mechanical stop, so even if the nut gradually loosens due to vibration, it cannot come off the bolt 14, fundamentally preventing connection failure.

[0027] Under the alternating galloping load provided by the non-destructive limit test conditions, the uniform clamping stress distribution generated by the fixing part 1 effectively avoids fretting wear and fatigue crack initiation caused by local stress concentration, protects the surface integrity and structural continuity of the end fittings of the test specimen, and makes the failure mode of the test specimen more realistically reflect its design weaknesses, rather than local damage introduced by the limitations of clamping or experimental design, thus enabling the experimental conclusions to effectively map the actual operating conditions.

[0028] The torsion part 2 is fixedly connected to the end of the fixed part 1 away from the phase spacer bar; the torsion part 2 includes four core components: a first movable disk 21, a second movable disk 22, a connecting column 23, and a braided metal rope 24. The spatial relationship and mechanical cooperation between the components constitute a complete flexible constraint kinematic pair system.

[0029] One side of the second movable disk 22 is connected to the vibration source via an adjustment part 3. The adjustment part 3 includes a first adjustment member 31 and a second adjustment member 32. The first adjustment member 31 and the second adjustment member 32 are provided with a plurality of adjustment holes 33 spaced apart along their respective length directions. The first adjustment member 31 and the second adjustment member 32 are detachably connected by connectors 34 passing through at least two sets of corresponding adjustment holes 33. The adjustment part 3 increases the distance between the spacer bar of the sample and the vibration source, so that the spacer bar is no longer in the peak inertial impact region. The multi-degree-of-freedom coupling effect is weakened, the dynamic amplification effect of small assembly errors is suppressed, and the deviation between the experimental conditions and the actual operating conditions is reduced.

[0030] The connecting member 34 is a fastening bolt; the first adjusting member 31 is a plate-shaped member with a rectangular cross-section; the second adjusting member 32 is a fork-shaped structure with a single-sided opening and two opposing fork arms 35; the first adjusting member 31 is inserted into the opening of the fork-shaped structure and slides with the two fork arms 35. The fork-shaped double fork arms 35 form a clamping constraint on the plate-shaped member from both sides, which is equivalent to providing double-sided guide support. The combination of the two makes the entire adjusting part 3 deform less when subjected to the combined tensile, compressive, and bending loads transmitted by the interphase spacer bars, thus ensuring the structural stability of the connecting fixture.

[0031] The length can be adjusted and locked by inserting the fastening bolts into the aligned adjustment holes 33 to adjust the relative extension length of the two. The distance between the output end of the vibration source and the interphase spacer bar specimen can be adjusted to a reasonable range according to the length of the interphase spacer bar and the experimental requirements.

[0032] On the side of the second movable disc 22 away from the adjustment part 3, one end of the connecting column 23 is vertically fixed in an integral manner at its center to maintain the structural integrity and fatigue life of the torsion part 2 under long-term alternating loads; the other end of the connecting column 23 movably passes through the center of the first movable disc 21 and forms a movable ball head 25.

[0033] The first movable plate 21 is fixedly connected to the fixed part 1, together forming a semi-enclosed cavity space, namely the limiting movable chamber 26. The limiting movable chamber 26 is configured to accommodate the movable ball head 25, and allows the movable ball head 25 to adaptively engage with the first movable plate 21 in a spherical abutment fit or a gap-free disengagement fit when the first movable plate 21 and the second movable plate 22 are relatively displaced. The center of the first movable plate 21 has a spherical groove 27 that matches the outer spherical surface of the movable ball head 25. When the relative displacement between the first movable plate 21 and the second movable plate 22 causes the movable ball head 25 to disengage from the effective contact area of ​​the spherical groove 27, the movable ball head 25 is in a gap-free disengagement state from the first movable plate 21 within the limiting movable chamber 26. The inner wall of the limiting movable chamber 26 limits the stroke of the movable ball head 25, preventing it from completely disengaging or undergoing excessive unintended displacement, ensuring the safety and continuity of the connection.

[0034] Under conditions such as sudden axial impact load during the dancing process, the movable ball head 25 can generate a small upward axial displacement within the limiting movable chamber 26, which plays a role in buffering and absorbing energy, avoiding hard collisions and stress peaks of rigid connections under axial impact, and protecting the end fittings and tooling structure of the test specimen.

[0035] When the first movable disk 21 and the second movable disk 22 experience relative angular displacement due to the torsion of the spacer bar sample, the spherical surface of the movable ball head 25 contacts the spherical groove 27 at the center of the first movable disk 21, forming a spherical abutment fit. The radius of the spherical groove 27 is slightly larger than the radius of the movable ball head 25, forming a small clearance fit. This ensures that when the movable ball head 25 swings within the spherical groove 27, there is no interference between the spherical surfaces, resulting in a relatively smooth swinging process and reducing the occurrence of jamming. At this time, the movable ball head 25 swings at small angles in multiple directions within the spherical groove 27, realizing the relative torsional degree of freedom and multi-directional swinging degree of freedom between the first movable disk 21 and the second movable disk 22.

[0036] If the movable ball head 25 slides directly within the spherical groove 27 of the disc, the spherical surface of the disc will wear after long-term testing, leading to increased clearance and decreased motion accuracy. Therefore, a wear-resistant bushing is embedded within the spherical groove 27; the wear-resistant bushing is fixed to the spherical groove 27 by interference fit or adhesive bonding. With the wear-resistant bushing installed, wear only occurs on the bushing surface, and the disc body is completely protected.

[0037] When the wear-resistant bushing wears down to a certain extent, only the wear-resistant bushing needs to be replaced, without replacing the entire first moving plate 21, which greatly reduces maintenance costs and extends the service life of the tooling body.

[0038] The wear-resistant bushing is made of one of the following materials: tin bronze, aluminum bronze, or polyoxymethylene. Tin bronze has excellent self-lubricating properties and anti-galling ability. Its grain structure contains soft lead phase or free graphite phase, which can form a solid lubrication transfer film on the contact surface during sliding, significantly reducing the coefficient of friction and wear rate. Aluminum bronze has higher strength and hardness than tin bronze, and its wear resistance is more outstanding, making it suitable for harsh experimental conditions involving high-frequency, large-angle oscillation.

[0039] The edges of the first movable disc 21 and the second movable disc 22 are respectively provided with a plurality of corresponding connecting holes 4 along the circumference. The number of connecting holes 4 is determined according to the required constraint stiffness and the magnitude of the reset force, typically 6 to 12 pairs, evenly distributed along the circumference. The diameter of the connecting holes 4 is determined according to the diameter of the braided metal rope 24, with an appropriate gap between the hole diameter and the rope diameter, allowing the braided metal rope 24 a certain amount of movement within the connecting holes 4 to accommodate relative displacement in multiple directions between the two discs and prevent the rope from being sheared or bent at the opening of the connecting holes 4. The openings of the connecting holes 4 are chamfered or rounded to eliminate the cutting and wear of the rope by sharp edges, extending the service life of the rope. The inner wall of the connecting holes 4 can be polished or inlaid with ceramic / nylon protective coils to further reduce friction and wear of the rope within the holes.

[0040] The braided metal rope 24 is threaded through the corresponding connecting hole 4; the braided metal rope 24 is a single continuous rope; the single continuous rope is sequentially and alternately threaded through the connecting hole 4 on the edge of the first movable disc 21 and the connecting hole 4 on the edge of the second movable disc 22.

[0041] The braided metal rope 24 is made of multi-strand stainless steel wire (such as 304 or 316L stainless steel) or high-strength alloy steel wire (such as galvanized carbon steel wire rope). The braided structure ensures that each strand of steel wire is evenly stressed when the rope is subjected to tensile loads, and the rope can bend freely in any direction with extremely low bending stiffness. This characteristic allows the braided metal rope 24 to fully adapt to multi-directional relative displacements between the first movable disc 21 and the second movable disc 22, including axial contraction, radial offset, circumferential torsion, and any combination thereof, without producing rigid jamming or motion interference.

[0042] More importantly, in the initial stress stage, the braided structure inside the braided metal rope 24 gradually tightens, resulting in low stiffness. As the stress increases, the braided structure fully tightens, and the stiffness gradually increases, tending towards the tensile stiffness of the steel wire itself. This progressive stiffness characteristic allows the constraint reset force to increase smoothly with the deflection angle, without abrupt changes or jumps, avoiding impact loads at the rigid limit point and making load transmission smoother and more continuous.

[0043] After the braided metal rope 24 passes through all the connecting holes, the beginning and end of the single continuous rope are connected to form a closed loop, allowing the tension in each segment of the rope to be automatically and evenly distributed during dynamic processes due to the continuity of the rope. When a deflection occurs in a certain direction, causing an increase in tension in that segment, the tension increment is transmitted and dispersed to other segments of the entire rope through the closed loop, reducing local peak stress. The single rope forms a unified constraint system, and the constraint forces at each connecting hole 4 are interconnected and coordinated, eliminating inconsistencies in stiffness caused by differences in manufacturing tolerances or installation preload, thus ensuring the stability and circumferential uniformity of the torsional constraint characteristics.

[0044] The braided metal rope 24 is configured to apply a constraint restoring force to the first movable disc 21 and the second movable disc 22 when there is a different axial offset or relative torsion.

[0045] The constraint and restoring force of the braided metal rope 24 increases with the increase of the offset torsion angle and offset between the first movable disc 21 and the second movable disc 22, exhibiting an approximately linear stiffness characteristic within a small deformation range. The constraint of the braided metal rope 24 is progressive and flexible, without rigid collisions or impacts. The progressive flexible motion torsion and restoring structure composed of various components closely resembles the state of the interphase spacers dancing and torturing between conductors in a real environment. In this dynamic experiment, when the deflection approaches its maximum value, the constraint force of the braided metal rope 24 increases smoothly, gradually decelerating the motion to zero, rather than being suddenly stopped by a rigid stop. This characteristic eliminates impact noise, stress peaks, and fatigue damage sources at the rigid limit, protecting the integrity of the connection structure while ensuring a smooth and continuous load transfer curve.

[0046] During the experiment, the vibration source reciprocates according to a preset dancing waveform (usually a low-frequency, large-amplitude elliptical trajectory or a figure-eight trajectory), thereby driving the adjustment unit to transmit simulated dancing energy. The dancing energy is then transmitted to the movable ball head 25 through the second movable disk 22 and the integrally formed connecting column 23. The movable ball head 25, within the limiting movable chamber 26, adapts to the relative displacement between the first movable disk 21 and the second movable disk 22, exhibiting either a spherical contact fit or a gap disengagement fit.

[0047] When the spacer bars between the test specimens undergo natural small-angle torsion or multi-directional oscillation due to asynchronous movement at both ends, the relative distance between the two ends of the spacer bars generally changes accordingly. The two movable discs then deflect relative to each other. When the movable ball head 25 smoothly oscillates within the wear-resistant bushing of the spherical groove, the braided metal rope 24 is torn, stretched, or deflected, generating a progressive flexible constraint and reset force on the spacer bars. Furthermore, when the movable ball head 25 undergoes relative displacement within the limiting movable chamber 26, resulting in a disengagement of the spherical gap, the braided metal rope 24 begins to generate a gradual axial tensile and torsional force on the spacer bars, followed by reset. This periodic change closely approximates the actual force changes at both ends of the spacer bars. Throughout the torsion and oscillation process, the influence of rigid jamming is greatly reduced, and over-constraint and uneven wear phenomena are eliminated.

[0048] Example 2,

[0049] This embodiment is an improvement on embodiment 1. The braided metal rope 24 includes multiple independent rope segments, the number of which is the same as the logarithm of the connecting holes 4. The first end of each rope segment passes through and is fixed in one of the connecting holes 4 on the edge of the first movable disc, and the second end of each rope segment passes through and is fixed in one of the connecting holes 4 on the edge of the second movable disc 22 that corresponds axially to the connecting hole 4.

[0050] See Figure 7 In some specific implementations, each rope segment is individually threaded into a pair of corresponding connecting holes 4, and its ends are connected after it is threaded out. Specifically, connection methods such as crimped sleeves, braided reconnection, or special rope clamps can be adopted to form multiple independent and non-interfering micro closed loops.

[0051] When relative torsion or offset occurs between the first movable disc 21 and the second movable disc 22, the rope segment on the deflection side is slightly stretched, its internal tension increases, and it generates a restoring force pointing towards the neutral position. While the rope segment on the slack side experiences reduced tension, it maintains a certain pre-tension residual tension because it is also a closed loop, preventing complete slack and sagging. Each rope segment is independently supported by its own closed structure, and tension transmission is confined within its own loop. This independent loop structure achieves physical fault isolation. If a rope segment breaks or disengages due to long-term high-frequency fatigue or extreme impact, the tension in that segment will be released instantly, but the remaining undamaged independent rope segments can continue to provide restraining restoring force.

[0052] See Figure 8In some specific embodiments, the first end of each rope segment passes through and is fixed in the connecting hole 4 of the first movable disc 21, and the second end passes through and is fixed in the corresponding connecting hole 4 of the second movable disc 22. The rope segment forms a knot or is crimped at both ends, presenting itself as an independent straight or slightly curved tensile member anchored at both ends. The rope segment can be fixed using methods such as crimped sleeves, braided rejoints, or special rope clamps. When the two discs experience relative displacement, the geometric length of the rope segment is forced to change, thereby directly generating axial tensile stress within the rope body. This tensile stress is transmitted along the axis of the rope segment, applying direct tensile constraint to the two discs. Compared to a closed loop, the rope segment experiences more direct stress in this form, and the magnitude of its constraint force depends on the initial installation preload length of the rope segment and the relative displacement between the two discs.

[0053] Independently anchored rope segments offer greater spatial flexibility in arrangement. When there are many connecting holes 4 or the distance between the two discs is small, independent rope segments can effectively avoid mutual crossing, friction, and interference between rope segments by adjusting the position of the fixing points or using rope segments of different lengths, further reducing the risk of abnormal wear of the rope during dynamic movement.

[0054] Example 3

[0055] This application provides a phase-spacer bar galloping test apparatus, including the aforementioned phase-spacer bar galloping test connecting fixture.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A connecting fixture for a phase-to-phase spacer bar galloping experiment, characterized in that: include The fixing part has one end for clamping and fixing the end of the interphase spacer bar; The torsion part is fixedly connected to the end of the fixed part away from the phase spacer bar; the torsion part includes a first movable disc, a second movable disc, a connecting post, and a braided metal rope. One side of the second movable disk is connected to the vibration source; one end of the connecting column is vertically fixed at the center of the other side; the end of the connecting column away from the second movable disk moves through the center of the first movable disk and forms a movable ball head; the first movable disk and the fixed part are fixedly connected to form a limiting movable chamber; the limiting movable chamber is configured to accommodate the movable ball head, and allows the movable ball head to adaptively engage with the first movable disk in a spherical contact fit or a gap disengagement fit when the first movable disk and the second movable disk are relatively displaced; The edges of the first movable disc and the second movable disc are respectively provided with a plurality of one-to-one corresponding connection holes along the circumferential direction, and the braided metal rope is passed through the corresponding connection holes; The braided metal rope is configured to apply a constraint restoring force to the first and second movable discs when they experience different axial offsets or relative torsion.

2. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: The fixing part includes a first clamping fixing member and a second clamping fixing member. When the first clamping fixing member and the second clamping fixing member are engaged, they form a clamping cavity for clamping the end of the interphase spacer bar. The first clamping fixing member and the second clamping fixing member are detachably fixedly connected by bolts.

3. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: One side of the second movable disc is connected to the vibration source through an adjustment part; the adjustment part includes a first adjustment member and a second adjustment member; the first adjustment member and the second adjustment member are provided with a plurality of adjustment holes spaced apart along their respective length directions; the first adjustment member and the second adjustment member are detachably connected by connectors passing through at least two sets of corresponding adjustment holes.

4. The experimental connection fixture for the galloping of interphase spacer bars according to claim 3, characterized in that: The connecting member is a fastening bolt; the first adjusting member is a plate-shaped member with a rectangular cross-section; the second adjusting member is a fork-shaped structure with a single-sided opening and two opposing fork arms; the first adjusting member is inserted into the opening of the fork-shaped structure and slides with the two fork arms, and the length adjustment and locking are achieved by the fastening bolt passing through the aligned adjusting hole.

5. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: The braided metal rope is a single continuous rope; the single continuous rope is alternately threaded through the connecting holes on the edge of the first movable disc and the corresponding connecting holes on the edge of the second movable disc, and after passing through all the connecting holes, the first end and the last end of the single continuous rope are connected to form a closed loop.

6. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: The braided metal rope comprises multiple independent rope segments, the number of which is the same as the number of connection holes; the first end of each rope segment is inserted into and fixed in one of the connection holes on the edge of the first movable disc, and the second end of each rope segment is inserted into and fixed in one of the connection holes on the edge of the second movable disc that corresponds axially to the connection hole.

7. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: The first movable disc has a spherical groove at its center that matches the outer spherical surface of the movable ball head; a wear-resistant bushing is embedded in the spherical groove; the wear-resistant bushing and the spherical groove are fixed by interference fit or adhesive bonding.

8. The experimental connection fixture for the galloping of interphase spacer bars according to claim 7, characterized in that: The wear-resistant bushing is made of one of the following materials: tin bronze, aluminum bronze, or polyoxymethylene.

9. The experimental connection fixture for the galloping of interphase spacer bars according to claim 1, characterized in that: The connecting column and the second movable plate are integrally formed.

10. An experimental apparatus for the galloping of interphase spacer bars, characterized in that: The apparatus includes the interphase spacer bar dancing test connection fixture as described in any one of claims 1-9.

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