Development and application of wire rope for port loading and unloading
ZHANG Ji-feng(Wuhan Iron and Steel WISCO Wire Rope Co.,Ltd.,Wuhan 430415,China)
To analyze raw materials,production process,structure design ,selection and use outline of wire rope for port loading and unloading. It is pointed out that the content of phosphorus,sulfur,nitrogen,oxygen in wire rod should be very low,content of carbon,silicon,manganese and copper wave small; heat treatment furnace should be advanced,process parameters should be controllable and precision as heat treatment,high sorbitizing rate and small tensile strength dispersion after treatment; using heavy coil to run can decrease electricity tie-in and avoid steel wire for rope brittle breaking,all these measures can improve quality of steel wire for rope. To choose and use out layer more than eight strands wire rope,compact strands rope,metal core rope,and to use engineering nylon to fill in layers of rope,between out layers can prolong service life of wire rope for port loading and unloading efficiently. The curvature radius of rope trough to wind rope is 0.54 times of rope diameter in use,rope trough width is bigger than 5%~8% practical rope diameter,leaning angle from top pulley to edge of wheel is not bigger than 1.5 degree,less than 1.2 degree had better.