250 results about "Tribology" patented technology

The invention discloses a cylindrical roller trajectory tracking method and device, and the cylindrical roller trajectory tracking method comprises the following steps: obtaining an actual measurement displacement sequence of a key point on the end surface of a roller under a global coordinate system based on a multi-reference matching digital image correlation method; drawing a key point displacement curve about key points and time according to the actually measured displacement sequence; judging the motion state of a roller according to the shape characteristics of the key point displacement curve, dividing a smooth part in the key point displacement curve into a rolling area, and dividing a part with jumping or sharp points into a sliding area; calculating the actual revolution angular velocity and the actual rotation angular velocity of the roller based on the actually measured displacement sequence corresponding to the sliding area; according to the method and the device, the image matching precision can be improved, meanwhile, the rolling and sliding components of the roller are accurately distinguished, the precision of the track of the cylindrical roller is improved, and high-precision and visual experimental data are provided for existing dynamics and tribology models.

The invention relates to the field of design and preparation of powder metallurgy friction materials, in particular to a copper-based powder metallurgy friction material and a preparation method thereof. Raw materials used in the method comprise, by mass, 45%-55% of copper powder, 8%-20% of iron powder, 6%-15% of ferrochromium, 16%-22% of graphite, 0.5%-4% of molybdenum disulfide, 0.5%-4% of tin sulfide and 0.5%-4% of nickel-coated tungsten disulfide, and the mass ratio of the tin sulfide to the nickel-coated tungsten disulfide is (1-2): (1-2). In the nickel-coated tungsten disulfide, the content of nickel is 5-40%; the sum of the total amount of molybdenum disulfide, nickel-coated tungsten disulfide and tin sulfide is less than or equal to 5%. The preparation method comprises the following steps: weighing raw material powder according to the designed components, mixing, pressing and sintering to obtain the product. The composition design has the characteristics of scientificity, simple and controllable process and the like, and the obtained product has excellent tribological performance and completely meets the friction braking requirement of high-speed heavy-load equipment of 400km / h and above.

The present invention relates to the technical field of wheel-rail tribology. Specifically disclosed is a wheel-rail material rolling contact fatigue damage prediction method based on different evaluation indices. The method comprises the following steps: on the basis of a wheel-rail shakedown map, carrying out wheel-rail rolling contact fatigue simulation tests, so as to obtain damage states and shakedown limit curve equations of wheel / rail materials with different shear yield strengths under different contact parameters; on the basis of a rough set theory, calculating the importance and relative weights of different evaluation indices; establishing a comprehensive evaluation index cloud model, respectively calculating comprehensive certainty degrees of an index attribute value to be evaluated belonging to different damage states, and using a maximum-value rule for the comprehensive certainty degrees to evaluate and predict rolling contact fatigue damage states; and using comprehensive evaluation index attribute values to perform validation, so as to finally determine a prediction result of a selected wheel-rail material rolling contact fatigue damage state under a condition to be subjected to prediction. The method in the present invention only depends on existing engineering data, such that the subjectivity of a damage state prediction process can be greatly reduced.

The invention relates to a preparation process optimization method of a zirconium alloy material with high fretting wear resistance, which comprises the following steps: setting a chemical component optimization range of a zirconium alloy, including specific proportions of tin, iron, niobium, chromium and oxygen elements; establishing a computer simulation model, and predicting the wear volume, tribological stability and microstructure evolution of the material under the fretting wear condition; then, a complete optimization scheme is output based on the model optimization homogenization treatment temperature interval, the hot working deformation range, the cold working cumulative deformation degree and the annealing system; and finally, a preparation process sequence including smelting, homogenization treatment, hot working deformation, cold working deformation and final heat treatment is implemented, the zirconium alloy material with the equiaxed grain structure is prepared, and the wear resistance of the zirconium alloy material is verified through an experimental fretting wear performance test. Compared with the prior art, the method has the advantages that through systematic component design and process parameter simulation optimization, the material performance is remarkably improved, and the application reliability is enhanced.

The invention discloses a preparation method of an enhanced high-entropy alloy laser cladding coating based on carbide and rare earth oxide. The preparation method is specifically implemented according to the following steps: step 1, designing a laser cladding scheme; step 2, determining laser process parameters; step 3, preparing a cladding layer; and 4, testing the performance of the cladding layer. The mechanical property and the tribological property of the cladding layer are improved, the service life of the gear is prolonged, and the reliability and the safety of equipment are improved.

The invention discloses a strong-combination wide-temperature-range wear-resistant composite coating, and relates to the technical field of solid lubricating materials, the composite coating comprises a transition layer, a functional inner layer, a diffusion barrier layer and a functional outer layer which are sequentially formed on the surface of a matrix, the transition layer is a Mo layer and a Mo2N layer, the functional inner layer is a MoAgN layer, the diffusion barrier layer is a Mo2N layer, the functional outer layer is a MoAgN layer, and the functional inner layer is a MoAgN layer. The functional outer layer is a MoAgN layer, and the MoAgN layer comprises a Mo2N phase and an Ag phase. The invention further discloses a preparation method of the composite coating and application of the composite coating in the field of solid lubrication protection. The composite coating is good in film-substrate binding force and low in friction coefficient and wear rate in a wide temperature range, damage to key mechanical parts in the air foil bearing caused by high-temperature lubrication failure can be avoided, and the tribological performance of the bearing parts under the working condition of the wide temperature range is improved.

The invention discloses a broken tooth repairing method based on a laser cladding technology. The broken tooth repairing method is specifically implemented according to the following steps that 1, the profile of a broken tooth surface is obtained; 2, broken tooth repairing preparation; 3, repairing the section; and 4, heat treatment and performance optimization. The broken gear can be efficiently repaired, the mechanical property and the tribological property of the broken gear can be improved, and the service life of the gear is prolonged.

The invention discloses a non-contact ice friction coefficient measuring method and device, and relates to the tribology testing technology, and the method comprises the following steps: obtaining a motion image of a slide block on an artificial ice rink by using a camera system; performing preprocessing and target detection on the acquired image to obtain coordinate information of the sliding block in a world coordinate system; and based on the coordinate data of the sliding block, fitting and solving the acceleration of the sliding block by adopting primary function expansion in combination with a Tikhonov regularization method, and carrying out inversion in combination with a friction mechanical model and a kinematic model to obtain an ice friction coefficient. Compared with a traditional contact type method, the in-situ high-precision measurement of the ice friction coefficient can be realized under the condition of no sensor attachment or external force interference, the defects of low measurement precision and strong invasiveness in the prior art are effectively overcome, and the method can be applied to the fields of winter road safety detection and ice and snow sports.

The invention relates to the technical field of metal material strengthening treatment, in particular to a micropitting-resistant wind driven generator gear carburizing and quenching composite strengthening process which comprises the following steps: S1, gear blank pretreatment and surface activation; s2, gradient carburizing strengthening treatment; s3, grain refinement annealing treatment; s4, step quenching strengthening treatment; s5, performing deep cooling and thermal cycle treatment; s6, directional tempering regulation and control treatment; s7, composite shot peening strengthening treatment is conducted; and S8, an antifriction composite film layer is deposited on the surface of the gear subjected to shot peening strengthening in the S7. According to the method, through a synergistic strengthening mechanism of gradient carburization, step quenching, structure regulation and control and surface functionalization, the residual stress distribution and tribological performance are optimized while the high surface hardness of the gear is kept, and the technical problems that in a traditional technology, the carburized layer is concentrated in stress, uneven in structure, single in surface performance and the like are solved.

The invention relates to the technical field of low-temperature tribology and test instruments, and discloses a low-temperature tribology test board and test method for a radial rolling bearing under liquid nitrogen soaking, the test board comprises a driving system, the driving system is composed of a motor, an electric box, a front cover box, a coupler and a main shaft, the motor is provided with an output shaft, and the output shaft is connected with the main shaft through the coupler; the main shaft is provided with a tested radial rolling bearing. The liquid nitrogen circulating system comprises a self-pressurization liquid nitrogen tank, a liquid nitrogen controller, a liquid nitrogen input pipeline, a liquid nitrogen output pipeline, a sealing bearing seat and a sealing assembly. According to the low-temperature tribological test bench and test method for the radial rolling bearing under liquid nitrogen soaking, the bearing can be effectively and uniformly covered by using a liquid nitrogen circulating system, the extremely low temperature is always kept during testing, the tribological performance of the bearing in an extremely low temperature environment is truly reproduced, and an external force in a complex direction can be applied to the bearing, so that the test efficiency is improved. And the real working condition in use in a low-temperature environment is simulated during testing.

The invention discloses a construction method of an external electric field relaxation optimization model based on molecular dynamics simulation, and belongs to the crossing field of computer-aided calculation and modeling, tribology and material science. The method comprises the following steps: determining the category and hierarchical structure of a friction model according to the friction force behavior of a to-be-researched object; establishing a friction model based on the category and hierarchical structure of the friction model; and determining relaxation optimization parameters of the friction model under an external electric field in molecular dynamics simulation, and performing relaxation optimization to obtain a relaxation optimization model. According to the method, the regulation and control mechanism of the electric field on the performance of the friction pair material can be comprehensively and truly simulated, and a model basis is provided for optimal design of the friction material.

The invention discloses a wear-resistant diamond-like carbon composite film on the surface of a rubber material and a preparation method and application of the wear-resistant diamond-like carbon composite film. The abrasion-resistant diamond-like carbon composite film sequentially comprises a Ti transition layer and a DLC functional layer. Wherein the Ti transition layer is sputtered and deposited on the surface of a rubber material through a direct-current magnetic control power supply, so that the bonding strength of the film can be greatly improved; the DLC functional layer is deposited on the Ti transition layer, and the structure of the DLC functional layer can be flexibly regulated and controlled by adjusting on and off of a Ti target power supply, so that the tribological performance and the environmental adaptability of the composite film are optimized. The abrasion-resistant diamond-like composite film has the advantages of being high in bonding strength, low in friction coefficient, high in environmental adaptability and the like, can be used for surface strengthening and service life prolonging of rubber sealing materials in the marine environment, and is suitable for large-scale industrial production.

The invention discloses a preparation method of a positive friction layer of a nano generator. Comprising the following steps: pouring a fluorocarbon coating into three-dimensional layered porous graphene and a fluorocarbon diluent to prepare a mixed solution with different graphene mass fractions, carrying out magnetic stirring and ultrasonic treatment on the mixed solution, then pouring the mixed solution into a planetary ball milling tank for grinding, adding a fluorocarbon curing agent, and carrying out magnetic stirring and ultrasonic treatment on the treated mixed solution again, and finally performing vacuum drying to obtain a composite material, preparing a positive friction layer, and coating the composite material. The positive friction layer adopts a 3D HPG-FEVE composite material as the friction layer, in the aspect of electrical properties, due to steric hindrance formed by fluorocarbon molecules among graphene, dielectric loss is reduced, and the electrical output performance is improved; due to the fact that a composite material prepared from 3D HPG and FEVE has a layered lubricating effect on the wear resistance, the interlayer interaction is weak, the chemical stability is good, a continuous chemical protection film can be formed in the friction process, and the tribological performance of the positive friction layer is excellent.

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

The invention relates to the technical field of rolling bearing tribological performance measurement, in particular to a rolling bearing high-speed transient friction torque measuring device and method. The measuring device comprises a rack, and two bearings to be measured are installed on the rack. The tested bearings are connected through a transmission shaft, one end of the transmission shaft is connected with a servo power system, and a speed sensor is arranged on the transmission shaft; after a shaft system composed of the two tested bearings is accelerated to a certain speed, a clutch is disconnected, the shaft system is in an angular velocity free attenuation state, then an angular velocity change curve in the process is recorded through a speed sensor, and the transient friction torque of the tested bearings can be obtained. The problem that torque measurement cannot be carried out in an unbalanced state by a traditional measurement method is solved. According to the invention, only two tested bearings are arranged, so that errors caused by extra friction of the bearings of the torque sensor are avoided; and the precision of the adopted speed sensor is far higher than that of a torque sensor, so that the friction torque measurement precision is greatly improved.

The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.

The invention relates to a particle-reinforced Poly Ether Ether Ketone (PEEK) matrix composite material which exhibits superior wear resistance and mechanical qualities, and its method of preparation. This composite material offers superior mechanical and tribological qualities, as well as an extended service life, in comparison to PEEK-based composites utilized in the contemporary medical and aviation industries.

The invention belongs to the technical field of high-entropy ceramic materials, and particularly relates to a high-entropy boride ceramic material and a preparation method and application thereof. The invention provides a preparation method of a high-entropy boride ceramic material, which comprises the following steps: mixing high-entropy boride and silicon carbide to obtain a mixed material; the high-entropy boride is (Ti < 0.2 > Zr < 0.2 > Nb < 0.2 > Mo < 0.2 > Ta < 0.2 >) B2; the silicon carbide comprises silicon carbide whiskers and / or silicon carbide particles; and sintering the mixed material to obtain the high-entropy boride ceramic material. The high-entropy boride ceramic material prepared by introducing the silicon carbide whiskers and / or the silicon carbide particles into the high-entropy boride (Ti0. 2Zr0. 2Nb0. 2Mo0. 2Ta0. 2) B2 has relatively high density, fracture toughness and bending strength, and the high-temperature tribology performance of the high-entropy boride ceramic material can be effectively improved.

The invention provides a method for improving the wear resistance of a bearing. The method mainly comprises the following steps: firstly, cleaning the bearing; fixing the bearing on a substrate table of a vacuum chamber; then forming a Cr transition layer on the surface of the bearing by adopting a direct current sputtering method; and finally, the HfO2 / WS2 composite coating is prepared on the surface of the Cr transition layer through a co-sputtering method, HfO2 is obtained through radio-frequency sputtering, and WS2 is obtained through direct-current radio-frequency sputtering. The Cr transition layer and the HfO / WS composite coating are prepared on the surface of the bearing, so that the tribological performance of the bearing under the dry running condition is remarkably improved, the abrasion degree is reduced, the service life of the bearing is prolonged, and the requirement of the modern industry for high performance of the bearing is met.

The invention relates to the field of graphene composite materials, in particular to a high-thermal-conductivity graphene composite material for a self-lubricating coating, which is prepared from the following components in percentage by mass: 45 to 55 percent of matrix material, 10 to 15 percent of graphene, 20 to 25 percent of metal sulfide, 10 to 13 percent of high-thermal-conductivity filler, 3 to 5 percent of dispersing agent and 1 to 2 percent of interface modifier, in addition, the invention further discloses a preparation method of the high-thermal-conductivity graphene composite material for the self-lubricating coating, and the preparation method comprises the steps of raw material pretreatment, premixing, multi-stage jet mill compounding, post-treatment and the like. Stable and uniform dispersion of fluorinated graphene in a system is successfully realized, the problem of stress concentration caused by agglomeration is thoroughly avoided, and the mechanical integrity of the composite material and the consistency of tribological properties are remarkably improved.

One aspect of the invention relates to a test specimen (100) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the specimen is provided with male and female fasteners (130) comprising a protrusion (131) extending from a free end of a first longitudinal rod and a recess (132) recessed at a free end of a second longitudinal rod. A second aspect of the invention relates to an apparatus (300) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the apparatus is provided with a test bench (300) on which the test specimen (100) is mounted, and wherein the apparatus includes a vibrator (310) for transmitting vibrational excitation to the test specimen (100) and a static loading device (320) for transmitting low-cycle stress to the test specimen. A third aspect of the invention relates to a method (400) for implementing the characterization apparatus (300).

The application belongs to the field of copper alloy friction, and particularly relates to a heterogeneous layered copper-copper zinc alloy with friction anisotropy and a preparation method thereof. The method comprises the following steps: step (1), mechanical polishing of copper plates and copper zinc alloy plates; step (2), organic oil removal; step (3), alternately stacking the copper and the copper zinc alloy, and diffusion welding to form a copper-copper zinc material blank; step (4), cold rolling of the blank at room temperature with a total deformation of 88% to 98%; and step (5), annealing of the rolled blank in an argon stream at 300 DEG C to 350 DEG C for 3 to 4 hours to obtain the copper-copper zinc alloy. The copper / copper zinc alloy with different layer spacings obtained by the application can be used to study the relationship between the layer spacing and the friction anisotropy by adjusting the layer spacing, thereby providing a criterion for designing a heterogeneous layered alloy with excellent tribological properties.

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.

A new type of oil cavity recess type static and dynamic pressure thrust bearing, with the development of high speed heavy load cutting technology, heavy equipment gradually to high speed heavy load development, we are more and more high performance requirements of static pressure thrust bearing, but with the increase of speed and load, the lubricating oil film because of the action of shear force and extrusion force, shear heat increases, oil film thin, even in local tribology failure phenomenon, and bearing because of local overheating deformation, resulting in lubricating oil leakage, and lubricating oil viscosity decreases, will produce static pressure loss, therefore, the patent puts forward a new type of oil cavity recess type static and dynamic pressure thrust bearing, so that the static pressure thrust bearing work, oil cavity and rotary workbench guide surface between the total wedge gap, under the condition of rotary workbench high speed rotation, meet the conditions of dynamic pressure effect, use dynamic pressure effect, through the dynamic pressure to make up for the lack of static pressure bearing capacity, in order to achieve the purpose of improving the bearing capacity and stability.

The present application belongs to the technical field of tribology, and provides a kind of lubricating oil system and its preparation method and application, oil-based super-slippery system.The lubricating oil system provided by the present application includes base oil and oil-soluble copper-based nanoparticle;The mass content of oil-soluble copper-based nanoparticle in the lubricating oil system is 0.01-5.0%.The oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can improve the load capacity and anti-wear and friction-reducing performance of base oil as an additive;At the same time, under the action of frictional shear, the oil-soluble copper-based nanoparticle in the lubricating oil system provided by the present application can play a role in friction catalysis, promote the formation of high-performance carbon-based material, i.e., "the third body", in the friction interface and lubricating oil, thereby reducing the friction coefficient between polymer-metal pair to 10 ‑3 order of magnitude, and super-slippery phenomenon occurs, and the wear rate is at 10 ‑8 -10 ‑9 mm 3 / Nm level, reaching near-zero wear state.

The invention relates to the technical field of material surface engineering and extreme working condition tribology, in particular to a wide-temperature-range composite lubricating component based on multi-scale design and interface self-adaption and a preparation method of the wide-temperature-range composite lubricating component based on multi-scale design and interface self-adaption. The composite lubricating structure comprises, from inside to outside, a metal bonding layer; the composition of the diffusion barrier layer is continuously and gradually changed from the alloy composition matched with the metal bonding layer to the ceramic composition; the self-lubricating functional layer comprises a ceramic metal composite matrix and a plurality of lubricant capsules dispersed in the ceramic metal composite matrix; the lubricant capsule comprises a ceramic shell layer and at least two lubricating phases with different temperature activation characteristics wrapped by the ceramic shell layer. According to the invention, continuous and effective lubrication in a wide temperature range is realized, the friction coefficient can be stabilized below 0.3, and the problems of reduction of the binding force between a coating and a matrix and early failure are solved.

The application provides a low-friction high-wear-resistance resin-based composite material and a preparation method and application thereof, and belongs to the field of composite materials. The polytetrafluoroethylene nano powder modified by radiation is used together with inorganic filler particles such as graphite nano powder, molybdenum disulfide nano powder and the like to prepare a polyphenylene sulfide-based composite material at a certain compounding ratio. The composite material shows excellent tribological properties. On this basis, by adding a chopped carbon fiber and the like as a reinforcing filler, a high-strength, low-friction high-wear-resistance polyphenylene sulfide-based composite material is prepared by using a multi-scale functional filler network structure constructed inside the composite material. The technical process route of the application is simple, and the manufacturing cost is low. The application can be used for preparing friction protection parts, low-friction wear-resistant structures, wear-resistant bearings, self-lubricating parts, mechanical gaskets and the like under dry friction, and has a very broad application prospect in the fields of aerospace, transportation, electronic devices and high-end mechanical equipment.

The application integrates a passive wireless temperature control sensing unit and a pulse eddy current nondestructive testing module, synchronously collects temperature, frequency offset and lattice strain data of a low-temperature bearing ring under rotating working conditions, constructs a thermal-force coupling correlation model through a low-temperature tribology-thermal conduction coupling analysis module, and outputs a friction heat generation rate prediction value. Relying on a federal learning edge inference module, distributed model training is completed, combined with homomorphic encryption to guarantee data security, and the data island restriction is broken through. Based on an optimization strategy, the edge controller dynamically adjusts the sensing sampling interval through reinforcement learning, solves a multi-objective optimization problem by using a non-dominated sorting genetic algorithm, and drives the hierarchical start and stop of the self-cooling system. The application eliminates the physical interference of wired sensing, realizes adaptive temperature control and energy-saving cooling of the bearing ring under low-temperature working conditions, and improves the temperature control precision and system generalization ability.

The invention belongs to the technical field of metal surface strengthening, and particularly relates to a preparation method of an oil-storage wear-resistant ceramic film layer on a titanium alloy surface. The laser remelting technology and the inherent micropore oil storage function of the micro-arc oxidation ceramic film layer are combined, structural densification reconstruction and lubrication modification are conducted on the micro-arc oxidation ceramic film layer, the hardness of the film layer can be effectively improved, the shear stress in the friction process is reduced, and then the abrasion resistance of the film layer can be greatly improved. The oil-storage wear-resistant ceramic film layer on the surface of the titanium alloy prepared by the preparation method disclosed by the invention has relatively small friction coefficient and wear rate, and the tribological performance of the titanium alloy is effectively improved; laser remelting can perform structural densification reconstruction on the micro-arc oxidation ceramic membrane layer, so that the membrane layer has compactness and controllable distribution of a porous structure; and the method is wide in application range and suitable for titanium alloy parts of various models.

The application relates to the technical field of power engineering cable installation, and discloses an optical and electrical combined cable integrated laying and protection system for complex working conditions, which comprises: a rigid base configured to be anchored at a turning node; and a self-adaptive bearing assembly rotatably installed on the rigid base; the bearing assembly comprises elastic split units arranged in an axial direction; each unit is converted from an open state to a holding state of wrapping the side wall of the cable under radial pressure; and the inner surface of the unit is provided with a partitioned friction structure, which comprises a bottom high-friction rolling driving surface and two side wing low-friction sliding decoupling surfaces; through the cooperation of the tribological anisotropic structure and the self-adaptive geometric deformation, the tangential shear wear in the deep envelope state is eliminated, and the physical damage problem of the cable sheath and the optical unit in high-tension laying is solved.