Design And Analysis For Rope Machine Of Hoist Of Large Load Temporarily Installed Suspended Access Equipment

With the rapid development of the cleaning of the building facades and installing of the curtain of China, Construction platform plays an increasingly important role as the construction work at height equipment. The carrying capacity of the existing domestic construction platform from the earliest250kg～800kg, to now carrying capacity of2000kg, the carrying capacity of the construction platform is increasing. But as the entire construction platform systems upgrade part of the hoist rope institutions still using traditional design mode, it can no longer meet the needs of modern large load construction platform. Therefore, ZLP2000large load construction platform has been taken as the researching object in this paper. Structure Analysis for the rope institutions of hoist, get a reasonable rope, pressure rope institutions of hoist. It has certain guiding significance for the design and development of large load construction platform hoist.In order to complete the movement of working platform, a simply method is using the pressure plate with the preloaded force of the spring to compress tightly the steel wire rope in the traditional hoist mechanism. But this method results some problems. Such as, it is difficult to control the preloaded force of the spring, the pressing forces of plate distribute unevenly and so on. It is lead wire rope premature destruction. In order to solve the above-mentioned problems, the parametric equations between the lifting force and the pressure of pressure plate has been established by analyzing the relation of the wire rope tension of the hoist mechanism and the pressure of pressure plate based on the theory of friction drive. A new type of hoist rope rolling pressing mechanism with the pre-deformation in the pressure plate has been designed and the contour curve parametric equation of pressure plate has also been derived. We calculated the contact press between the various curves corresponding to the pressure and wire rope based on the Hertz theory, taken the maximum contact stress which is the minimum as the reasonable design curves. As a numerical example obtained when the curve is a parabola ZLP2000hoist is the most reasonable. Then we based on the ANSYS finite element analysis software to analyze the contact section. By setting the different parameters such as contact stiffness, penetration factor and so on of the contact part, we can get the optimal contact stress analysis. By Research through the contact stress, Von Mises stress and strain, we can get the relation between the node position and node stress and the relation between the node position and the node strain of the contact part; get the reasonable contour curves through comparative analysis. Finally established the virtual prototype model of the hoist rope institutions according to the ADAMS environment. By using secondary development function which is provide by ADAMS, we establish the parametric model of a wire rope. Verify the reliability of the model by the dynamic simulation.The hoister warping institutions as analysis prototype of the ZLP2000large load construction platform was used in this paper, using statics, finite element theory and dynamics theory, carrying on structure design for the hoister warping institutions under large loads, The results showed that the hoister was improved to run more smoothly under the same load, higher transmission efficiency of wire rope, to provide a valid reference for the design and development of related products.