Under Alternating Load Emulsion Pump Crankshaft Finite Element Analysis Research

As the synthesis picks the constant development of craft, the emulsion pump also to thehigh-pressured high flowate, the compact structure direction develops. The crankshaft systemas the emulsion pump important mechanical drive part, is one of the emulsion pump mostimportant parts. The spatial distribution and dimension of its overall construction and crankaffect the overall construction of pump to a great extent. Because its is withstanding the hugeperiodic alternating load, has the formidable alternating torsion stress and bending stress,therefore is extremely easy to create the bending strain even endurance failure of crank.Therefore, how accurately to obtain the size and distribution of stress and distortion of crank,examines its fatigue strength, estimates its fatigue life, is significant to the crankshaftstructure optimization and design improvement.This article uses the MRB400/31.5emulsion pump as the object of study. Carries on thekinematics and kinetic analysis computation to the center crank link motion gear of emulsionpump, Obtains the displacement, speed and the acceleration as well as the function plungerand connecting rod on the crank and along with crank angle periodic variation strengthfunctional,Takes example every other10°as a research operating mode, uses the MATLABprogramming of calculation the radial force and tangential force of function each crank on thecrank, provides the load boundary condition for the following finite element analysis variousoperating modes.Uses three dimensional software CATIAto suit the actual situation to the emulsion pumpcrank the modeling. Has carried on the overall finite element analysis to it with ABAQUS,has studied the overall crank in various operating modes stress and distortion conditions, Andlocates the stress biggest operating mode position. According to stresses response result andbond timber characteristics, Examined the fatigue strength of this emulsion pump crank underalternating load, Establishes crank-support contact model, Using the contact finite element method study overall crankshaft fatigue strength, and carries on the comparative analysis tothe main journal rigid support model and contact finite element analysis model two methods,Has provided the reference for the crankshaft fatigue strength design and technical change.