Assessment of operability of compressor crankshaft

Results of assessment of operability of the crankshaft of the K05-12 compressor installed in the Maxima 1000/1300 refrigeration unit on the Volvo cars are provided. As a criterion of refusal sudden physical destruction of the console site of the two-piece line crankshaft in a zone of a belt drive sheave at an early stage of operation is accepted. As a result of researches the microstructural analysis of material of original and replacement crankshafts is carried out, the rated scheme taking into account geometrical parameters of a part under the influence of operational loadings at an adverse combination to a static tension is made, analytical assessment of durability of the crankshaft is executed, the graphic 3D-model of a part executed by means of CAD-technology of the computer-aided engineering system COMPAS 3D is received. For the purpose of automation and increase in productivity and reliability of rated assessment of durability and rigidity of the crankshaft, test calculations are executed on the basis of CAE-technology by means of the computer-aided engineering system automated workplace АРМ WinMachine in the АРМ Studio automated workplace rated module. In the course of assessment comparative calculations of parameters of durability and rigidity at production of crankshafts are made of the VCh 40 high-strength cast iron (a replacement part) and VCh 70 (an original part), when performing fillets in a zone of destruction of a shaft on radius 0.5; 1.0 and 2.0 mm and also at the modes of normal and extreme operational loading. The end results were estimated in sizes of equivalent normal stresses from a bend and torsion, total linear movement, reserve factor on the flowability, static and fatigue resistance, quantity of cycles before fatigue failure. As a result of calculations emergency conditions of loading and basic reasons of failure of the crankshaft by physical destruction are established.