Double Girder Bridge Crane Trolley Lightweight Research ANSYS

Currently the research of crane weight-reduction focused on main beam ofcrane, the research of weight-reduction on crane trolley is still relatively little.Reduced small part in the quality of a crane trolley will lead to a reduction ofmost in the quality of a crane, thereby the quality of the material of constructionof the plant will be reduced twice quality of the crane, so the research ofweight-reduction on crane trolley is significant.In this paper, with125/32t overhead travelling crane trolley of double beamas an example, which track gauge is4720mm and the working-level of liftingmechanism and driving mechanism is M5, researching the weight-reduction ofcrane trolley:①analyzing the original car’s main lifting mechanism and vicehoisting mechanism are based on parallel axes style layout scheme, operationorganization uses centralized drive of low-speed shaft, the above are verytraditional transmission scheme. In unfavorable conditions, found that theoriginal small frame strength and stiffness of excess by ANSYS finite elementanalysis;②for the transmission scheme of the original trolley is relatively old,when redesigning small trolley, need to consider more advanced layout. Thenew car’s main lifting mechanism still use parallel axes style layout, vicehoisting mechanism use modular coaxial modular layout, operation institutionsuse “three in one” reducer. For meeting components arranged, redesigning smallframe;③by ANSYS finite element analysis, discover the improvement of newsmall frame and improve model;④optimizing small frame with APDLcommand stream, the improved model can be simplified before optimization,simplified into two stringers and two beams, writing programs with thethickness of each beam as a parameter and with a total volume of minimum asobjective function, get the thickness and total volume of the optimal.