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前言柴油机的调速器一般由曲轴或凸轮轴驱动。由于柴油机工作过程及配气机构、燃油泵工作的影响,即使在稳定工况下,曲轴或凸轮轴也呈现不均匀的转动。其不均匀的幅度和频率因柴油机及轴系动力性能的不同而不同。柴油机转速所具有的这种振动的特性,给以转速偏差作为控制信号的机械液压调速器带来了不利的因索,它使调速器的速敏元件始终处于振动的状态。结果,造成了伺服器输出、调控杆件、燃油泵油量调节机构(即齿条)的抖动。这种抖动的频率远高于调速系统不稳定(即波动、游车)的频率,故称为高频抖动。调速系统的高频抖动加剧了运动部件的磨损,破坏了
Foreword Diesel governor is usually driven by crankshaft or camshaft. Due to the working process of the diesel engine and the operation of the valve train and the fuel pump, the crankshaft or the camshaft also rotates unevenly even under steady conditions. The non-uniform amplitude and frequency vary with the dynamic performance of the diesel engine and shaft system. The vibration characteristics of diesel engine speed have brought unfavorable factors to the mechanical hydraulic governor that uses the speed deviation as a control signal, which keeps the speed-sensitive element of the governor in a vibrating state at all times. As a result, jitter in the servo output, control rod, fuel pump fuel gauge mechanism (ie, rack) results. This jitter frequency is much higher than the instability of the speed control system (that is, fluctuations, the car) frequency, it is called dither. Speed dithering system aggravates the wear and tear of moving parts