Research On Dynamic Simulation Of Crane Ship Jacketed Double Roller Slewing Bearing

In recent years, the rotary crane is applied in ocean engineering, the roller jacket slewing is a core component of the rotary crane, its design quality directly determines to some extent the whole crane performance and structural safety. Currently roller jacketed single row roller slewing ring can not meet the large-scale large crane lifting weight and overturning moment required, double or multi-row roller slewing ring has continued to applied in the rotary crane. In the design of multi-pivot roller double jacketed slewing ring, the roller wheel pressure distribution and maximum wheel load is an important technical parameters in the design process.The rotation part load of the crane passed through the turntable to the raceway, and then passed through the raceway to double rollers according to certain rules, So in the design and calculate the roller wheel pressure distribution and maximum wheel pressure, the assumptions of the raceway and the turntable is very important. In this paper, study the 900 t crane(lifting weight when Rotation 400t) roller jacketed double the roller slewing ring, using dynamics theory and related dynamic simulation software(SOLIDWORKS, ANSYS and ADAMS), in ADAMS software built crane rigid coupling model, research lifting and Rotation condition the roller jacket double the roller slewing ring wheel pressure distribution, the main contents are as follows:(1) Using the traditional formula, finite element software ANSYS analysis the crane double the roller slewing ring, calculation of five different conditions slewing ring roller wheel pressure distribution and maximum.(2) Using the software SOLIDWORKS respectively model the crane boom, Renzi Jia turntable, agencies, the raceway, the roller, cage, lower raceway and support cylinder rigid body modeling, imported into ADAMS add constraints and driving crane to get the entire rigid model. In ANSYS software build the raceway an the turntable to be flexible body modeling, in the ADAMS software replaced the turntable and the raceway with flexible body model get rigid coupling model.(3)Using the rigid model and the rigid coupling model in the dynamics simulation of lifting and rotary conditions, statistic the roller wheel pressure stress situation of two conditions, draw rolling distribution charts and extract typical roller wheel pressure curve.(4) Analysis the rigid body simulation and rigid hybrid model simulation results, at the same time compare with the results of the traditional formula algorithm、finite element algorithm, pointed out that the reasonableness of the various methods. Conclusion that rigid coupling model simulation results meet the actual.Research work for this paper has some practical value, it can provide a reference for further study in the double roller slewing ring or multiple rows.