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众所周知,活塞换向时,撞击作用下的强烈振动是被水冲刷的气缸表面产生穴蚀的主要原因。缸套的振动强度与柴油机的构造参数(气缸尺寸,运动件的材料和质量,气缸一活塞间的间隙量,曲轴转数等)有关。经研究证明,增加壁厚和在气缸套上补加支点可大大降低外套振动加速度,从而提高了寿命。在柴油机振谱中占多数的高频振动(1000～4000赫芝)在许多情况下决定总的振级。于图1所示的是装在减振架上的12ЧH15/18型,12ЧН18/20型和6Ч12/14型柴油机振谱和12ЧН15/18型柴油机气缸套振谱。柴油机振动在采用校检装置的试验台上测定,所用的仪器有:窄频带分析器,三分之一
As we all know, the piston commutation, the strong impact under the impact of the impact of water erosion is the main cause of surface erosion cylinder. The vibration intensity of the cylinder liner is related to the structural parameters of the diesel engine (cylinder size, material and mass of the moving part, amount of air gap between the piston and the piston, number of crankshaft revolutions, etc.). The study shows that increasing the wall thickness and adding a fulcrum to the cylinder liner can greatly reduce the vibration acceleration of the jacket, thus improving the life. Dithering (1,000 to 4,000 Hertz), which dominates the diesel spectrum, determines the overall vibration level in many cases. Shown in Figure 1 is mounted on the vibration damping frame 12ЧH15 / 18 type, 12ЧН18 / 20 and 6Ч12 / 14 diesel spectrum and 12ЧН15 / 18 diesel cylinder sleeve vibration spectrum. Diesel vibration was measured on a test bench using a calibration device using the following instruments: Narrowband analyzer, one-third