Single rope winding lifting equipment

An earlier onset , it is reliable, simple structure, but only for shallow and medium depth of the mine , and the terminal load is not too large . For deep wells and the terminal load is large, a large rope and hoist upgrade roll diameter , resulting in a hoist equipmentlarge volume , gravity soared, making the hoisting rope and hoist the manufacture , transport and use on both inconvenience. Thus , to a liftech cheap wire rope hoistcertain extent, limit the single rope winding hoist used in deep well conditions. Friction appears to enhance its development machine , to a certain extent, solve the single rope winding hoist that appear under the condition of deep problems. However , things are always divided into two . Generally used to enhance the friction tail rope balanced tension at both ends to reduce the error and improve reliability. Thus , the container connection with hoisting rope rope section , the static stress changes with position changes of the container . When the container is located in the unloading liftech hoist and trolleyposition the wellhead , the gravity of the entire container and the end of the gravity are acting on the rope of the section ; arrival when the container bottom before loading position to withstand only the gravity of the section of the container. In other words, the entire upgrade process, with the hoisting rope section of the vessel to bear in connection with an amplitude of . static stress changes σj = qH / S0 of (q is the tail rope per meter gravity , N / m H as lifting height , m S0 to enhance the cross sectional area of ​​the wire rope , cm2).