Fatigue And Reliability Analysis Of Transmission System In The Coal Mining Winch (55KW)

Gear transmission system in coal-mining winch mainly has a large load capacity, transmission reliability, high efficiency and thus can be used in transportation situations in the mines are large and widely used, its safety and more important. Transmission as the most critical stress component, the fatigue life and reliability of the design of the device for improving the availability and security are very important.UG software is used to build 55KW hoist the main components of the digital transmission system model to create a precise tooth root transition curve, to achieve the circular gear and spur gear parametric modeling; gear engagement theory based on the use of cylindrical gears mating plane, to achieve interference-free assembly, and get any gear meshing state. The use of ADAMS on the entire drive system simulation, get the shaft speed information and load spectrum, a finite element analysis and fatigue life analysis basis. Gear static bending and contact stress analysis (using Marc) of the gear geometry model structure simplification and boundary simplification; in a static bending stress calculation, the use of swept division method, select the gear end grid and guide lines, generate all hexahedral element, taking into account the actual gear meshing line as the load position; in the static contact stress calculation, more efficient mapping method used to create a pair of meshing gears of the finite element model, select the representative state of meshing, and uses rigid elements directly to the driving wheel torque.Fatigue analysis software is used to do analysis for the transmission system and gears. And figure out the fatigue life and promote safety factor to 2.95, according to the system coupling methods in system reliability verification, re-distributed in an optimal, ultimately determine the system degree of reliability to 0.9995. The completion of this research project, to improve the mine hoist gear transmission life and reliability, improve design quality, reduce manufacturing processing costs which has good engineering application.