Study On Mechanical And Friction And Wear Properties Of Braided Wire Rope Wires For Traction

The power grid is an important basic facility for national economic and social development,and cable tension and erection is widely considered as an important part of power grid construction.Braided steel wire ropes are erected in cable tension due to their good anti-twist,flexibility,and corrosion resistance.It is used as a traction rope and guide rope in construction and used repeatedly.During the traction process,when the braided steel wire rope passes through the traction mechanism,the winding mechanism,and the release pulley,it is subjected to repeated tensile,bending,twisting,and other loads,which may cause the wire rope to wear and fatigue and fracture.The fracture problem of braided steel wire ropes has always been a key issue that has plagued the construction of transmission and transformation companies.However,there are few researches on mechanical properties and frictional wear characteristics of the braided wire rope wire,such as stress and deformation,and the mechanical properties of the wire have a direct impact on the mechanical properties of the entire wire rope.Therefore,the braided wire rope is subjected to a straight state tensile load under the rope.The study of mechanical and frictional wear characteristics of silk has important theoretical and engineering significance for the design and manufacture of braided wire ropes,structural optimization,failure mechanism analysis,and service life prediction.This article takes the YS9-8×19 braided steel wire rope as the research object,mainly through the numerical simulation of its wire,mechanical modeling,friction and wear tests,etc.,to study its mechanical properties and friction and wear characteristics under linear state tensile load.The specific research content is as follows:(1)Modify the structural parameters of YS9-8×19 braided steel wire rope,reconstruct the three-dimensional solid model of the braided steel wire rope under straight state,obtain the finite element model of the wire rope with the wire rope as the basic unit through pre-processing,and carry out the straight-line tensile load.Under the action of the numerical simulation calculation;analysis of numerical simulation results,revealing the stress,deformation and contact pressure distribution law of wire rope wire,to explore the mechanical properties of the wire rope wire,and provide technical support for the location of the friction and wear of the braided wire rope wire.(2)According to the characteristics of braided steel wire ropes and the analysis of the tension state of the strands,the elastic equilibrium theory of Costello's ordinary steel ropes is used to establish the mechanical balance equation of braided steel wire ropes under straight state tensile load.One of the strands in a braided steel wire rope is For example,by analyzing the bearing deformation of the inner and outer side strands of a strand,the relationship between the axial deformation of the core strands,the inner side filaments and the outer side filaments is obtained;on this basis,the correlation in the mechanical equilibrium equation is deduced.Parametric expressions,with the help of the associated equations,the radial uniform load and the axial tensile stress expression at the contact point of the outer strands of the strands are deduced,and the mechanical model of the strands under the linear state tensile load of the braided steel ropes is established.It lays the foundation for constructing the wear depth model of wire under tension under linear state tensile load.(3)By analyzing the contact between the braided wire rope strands and the strands,find the contact points where the outer strands of the strands are susceptible to wear.Take the outer strands of the two strands at one of the contact points as an example.Derive its cross contact angle expression,and solve it through MATLAB programming;According to the relevant knowledge of material mechanics,solve the relative sliding distance between the outer strands of the rope strand;on this basis,introduce the wear coefficient,combined with the radial direction The cloth load relationship and the volume wear of the steel wire obtained through the friction and wear test can be used to establish a wire wear depth model with arbitrary angles crossing contact.This provides a theoretical basis for failure mechanism analysis and fatigue life study of braided steel wire ropes.(4)Perform braided wire rope anatomy experiments to make sure that the outer wire contact between the braided wire rope strands is the most worn place.Analyze the reason and verify the rationality of the finite element simulation.At the same time,with the aid of a wire friction and wear tester,YS9-8×19 braided steel wire rope was used as the test object,and the friction and wear test of the wire under straight state tensile load was performed according to the corresponding test parameters of the outer strand side strand..The friction coefficient,wear coefficient,and wear of the wire under different test parameters were obtained by numerical calculation.Depth value;Comparison test results and theoretical calculations,verification of theoretical analysis and the rationality of the wear depth model of the braided steel wire rope;and analysis of the three-dimensional wear scar surface morphology of wear,to lay the foundation for further exploration of the wear failure mechanism.