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由于高速柴油机连杆承受变化较大的爆发压力和惯性力,因此,在曲柄销轴承与连杆大端轴承座孔的接触面上产生诸如微动磨损等问题。本文根据这两个零件相对运动的理论与经验,为避免发生微动磨损,确立了连杆新的设计准则,并在新研制的高速柴油机的连秆设计中应用了该准则。采用新算法设计的连杆大端的锯齿结合面,其形状独特,刚性较好,且许用应力不受速度的影响。从而,使得连杆的许用应力比传统的高速柴油机的连杆有较大地提高。
As high-speed diesel engine connecting rod to withstand large changes in the outbreak of pressure and inertial force, therefore, in the crank pin bearing and connecting rod big end bearing hole contact surface such as fretting wear and other issues. Based on the theory and experience of the relative movement between the two parts, this paper establishes a new design criterion of connecting rod to avoid the fretting wear and applies the criterion in the newly designed high-speed diesel engine. Adopted by the new algorithm, the big end of the connecting rod serrated surface, its unique shape, good rigidity, and allowable stress from the speed of the impact. Thus, the allowable stress of the connecting rod is greatly increased than that of the conventional high-speed diesel engine.