Increasing operating life of hinge lugs in manipulators of mobile transportation and production machines

[摘要] The article deals with the issues of increasing the reliability of hinge lugs in manipulators of mobile transportation and production machines (loader cranes). At present, the actual operating life of hinges in heavily loaded cranes amounts to not more than 3000 operating hours, with the estimated value being 6000..8000 operating hours. The paper provides technical solutions of how to increase the operating life of hinge lugs. The first way consists in providing crack resistance in bimetallic compositions with specified crack resistance which allows increasing the operating life of hinge lugs by up to 50%. The second way involves equipping hinge joints with damper devices having elastic and dissipative elements. The damper devices allow reducing or completely eliminating the impact loads which occur due to the presence of a backlash in a worn-out hinge. The rational values of damper device elasticity and viscosity coefficients, which allow attaining the maximal reduction of impact loads, were determined. To prove the effectiveness of the proposed technical solutions, a mathematical modeling approach to the dynamic processes in loader cranes was employed.

[发布机构] Academician I.G. Petrovskii Bryansk State University, Bezitskaya Str. 14, Bryansk; 241036, Russia^1

[效力级别] 电工学

[关键词] Bimetallic compositions;Crack resistance;Dissipative elements;Dynamic process;Operating hours;Production machines;Technical solutions;Viscosity coefficient