Refined Design Method Of High Pressure Turbine Shaft’s Flange

High-pressure turbine is one of the key parts of aircraft engines, high-pressure turbine drum shaftconnect high pressure turbine and high pressure compressor, it is one of the main components transmittorque of the engine. In this paper, a multi-arc design is proposed for the chamfer structure of theinstallation edges of the high-pressure turbine drum-shaft. Research work of this paper includes thefollowing aspects:(1) The structural strength analysis of high-pressure turbine drum shaft of chamfer structureGiving its load and boundary conditions for the high-pressure turbine drum shaft structure of a typeengine, have intensity calculation, do analysis on the turbine shaft chamfer structure’s stress field.(2) Research on the low stress design method of the structure of chamfer structurePropose double-arc structure design scheme, three-arc structure design scheme and multi-arcstructure design scheme for installation edge chamfer structure. Do parametric modeling and strengthcalculations on double-arc and three-arc structure design scheme, compare with the single-arc scheme,get a preliminary design scheme of low stress.(3) Optimization design of double-arc and three-arc structure design schemeHaving an optimization design for double-arc and three-arc structure design scheme under thepremise do not increase the quality of the high pressure turbine. Further reduce the stress level at theinstallation edge, get the final round low stress structure design scheme. Optimal double-arc designscheme have a decrease of14.88%on maximum equivalent stress than single-arc design scheme, andoptimal three-arc design scheme have a decrease of17.52%.(4) Experimental research is carried out to evident the validation of low stress design method ofhigh-pressure turbine drum shaftDesigned single-arc and double-arc structural simulation test piece, by comparing the two pieces ofsimulation experiments to verify the use of multi-arc design structure can reduce the stress on chamferstructure. Double-arc design scheme have a decrease of21.94%on maximum equivalent stress thansingle-arc design scheme in static strength simulation experiments, and an increase of28.83%infatigue life simulation test.