Analysis of Bearing Capacity of Connecting Rod Bearing Assembly of Oil-free Piston Compressor under Transient Temperature Field
In order to further study the deformation mechanism of connecting rod bearing assembly of an oil-free lubricated piston compressor under temperature disturbance,this paper this paper took a certain oil-free lubricated compressor connecting rod bearing assembly as the research object,established the shaft bearing force model under changeable working conditions,studied the deformation mechanism of connecting rod and bearing under wide temperature range,carried out theoretical analysis and numerical simulation based on the fitting relationship of the connecting rod bearing assembly under temperature disturbance,and obtained the bearing and lubrication characteristics of connecting rod bearing.Based on the research results and combined with the actual failure cases,the structure of the bearing connecting rod components was optimized,and the improvement scheme was put forward and verified by experiments.The results show that the aluminum alloy connecting rod is easily affected by temperature,and the coordination gap between connecting rod and bearing under wide temperature range varies greatly.Affected by the machining precision of the parts,the bearing is subject to a certain axial force,and the leakage of grease along the coordination gap intensifies the bearing deviation,which seriously affects the life of bearing.Therefore,the bearing fittings under the wide temperature range should strictly ensure the position relationship of the parts,and it is extremely necessary to properly restrain the bearing matched with the aluminum alloy.
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