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一、前言 在活塞环上止点或邻近的下端处,气缸的磨损达到最大值。虽然研究工作者陈述了气缸磨损的一般原因,但是企图解释在气缸内上止点部位出现过度磨损的确切机理的报导确是很少。丁乐如和梅耶用理论计算预测了气缸各截面的磨损轮廓形状,並表明计算结果与实际使用情况十分吻合,典型的轮廓形状见图1。 对气缸磨损有较大影响的因素,按其机理大致可分为两大类:1)物理作用,包括粘着、刮伤和磨粒,2)化学腐蚀作用。 这两方面可以单独或共同起作用,取决于运转状况的差异和气缸运行的时间。
First, the preface At or near the bottom of the piston ring, the cylinder wear reaches its maximum. Although the researchers stated the general causes of cylinder wear, few attempts have been made to explain the exact mechanism of excessive wear at the top dead center in the cylinder. Ding Lerru and Meyer used the theoretical calculation to predict the wear profiles of the cylinder cross sections, and showed that the calculated results are in good agreement with the actual conditions. The typical contour shapes are shown in Fig.1. Cylinder wear has a greater impact on the factors, according to its mechanism can be broadly divided into two categories: 1) physical effects, including adhesion, scratches and abrasive particles, 2) chemical corrosion. These two aspects can work alone or together, depending on operating conditions and cylinder operating time.