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(一) 概述活塞是柴油机的重要零件之一,它在总装中与气缸套孔径构成的配合间隙,对柴油机的性能、寿命及主要技术经济指标都有较大影响。因此,设计图对该件外径不同部位的直径尺寸均提出严格的精度要求。 180柴油机活塞外径尺寸,是按两相垂直的平面方向、又按轴向五个不同的距离,分别提出D1至D5共10个不同的直径尺寸,并要求
(I) Overview The piston is one of the important parts of the diesel engine. The clearance formed by the piston in the assembly and the bore of the cylinder liner has a great influence on the performance, lifespan and major technical and economic indicators of the diesel engine. Therefore, the design drawing has strict precision requirements for the diameter dimensions of different parts of the outer diameter. The outer diameter of the piston of the 180 diesel engine is based on the two-phase vertical plane direction and five different axial distances. It proposes 10 different diameter sizes from D1 to D5, respectively.