Engine Main Bearing Lubrication Properties

Engine crankshaft-bearing system is a key component of the engine and its lubricating properties, tribology, dynamics, performance analysis and strength of stiffness is calculated to face the issue of engine design, a direct impact on the reliability and durability of the engine work. For a long time, scholars have for the dynamics and lubrication problems are conMNFered separately. This artificially simplifies the performance of the engine crankshaft system dynamics research. This article aims to explore the dynamics and the film will be a dynamic lubrication of coupled simulation analysis of the road, mainly for the following tasks .(1) In three-dimensional modeling software to build the software components of an engine crankshaft system three-dimensional solid model, in which the crankshaft model for finite element modal analysis, the main bearings bearing model is used to generate the finite element program can be fatigue The finite element used in the fatigue software data files.(2) Crank solid model import carried out finite element software Ansys crank modal calculations and the finite element model for modal reduction, and then export the results in the establishment of flexible multi-body dynamics to prepare for the crankshaft. (3) According to the actual size of an engine in a multi-body dynamics software ADAMS / Engine in the establishment of the crankshaft system, the rigid multi-body dynamic model.(4) Into elastomer crankshaft model to ADAMS / Engine, the replacement of the crankshaft rigid body and establish a rigid-flexible coupling multibody dynamic model for simulation.(5) Calling ADAMS / Engine in the hydraulic bearing module for film lubrication and multi-body dynamics coupling of the crankshaft system simulation analysis, while the output bearings in a cycle of work by the load, for the conduct of the main bearings of the fatigue analysis preparation.(6) To generate the finite element software for fatigue analysis of the main bearing to the bearing to use finite element model, while import from the oil film lubrication and multi-body dynamics coupling of the crankshaft system simulation the analysis of the spindle bearing capacity document, bearing fatigue analyzed and calculated.Based on the above contents to a engine, for example, the engine has been flexible multi-body dynamics and dynamic lubrication film coupling simulation. By ADAMS / Engine in the simulation, the simulation data obtained were compared, analyzed, taking into account or not taking into account the oil film dynamic lubrication of the engine the impact of multi-body dynamic simulation and, finally, an exploratory analysis of the main bearing fatigue life has been calculated.