Analysis on Strength and Stability of Oil Filter Cartridge Skeleton
The filter is the components for cleaning oil in hydraulic systems.Polluting particles in oil will gradually block the filter screen,causing an increase in the oil pressure difference between the two sides of the filter screen.The cartridge skeleton of filter will be crushed and fail when the pressure difference exceeds the critical bearing pressure of the cartridge skeleton.In order to study the strength changes of the skeleton under external pressure when the filter is blocked,a certain type of oil filter is taken as the research object and the equivalent stress and deformation of the skeleton are solved through non-linear dynamics and nonlinear buckling simulation.It is found that when the differential pressure of the filter cartridge skeleton exceeded 13.5 MPa,the maximum equivalent stress exceeded the material yield strength,and the filter has a risk of plastic deformation.The first-order nonlinear buckling load of the unstable skeleton is 13.5 MPa,and the unstable deformation is 10.59 mm,which is greater than the failure and deformation criteria for filter skeleton.The maximum stress is 963.7 MPa,which exceeds the material buckling strength.At this time,the skeleton loses its original stiffness under the effect of structural weakening,leading to step instability and collapse failure of the skeleton.The research provides a reference for predicting the critical load and designing of filter.
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