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液压元件污染允许度的大小取决于它的污染敏感度和工作条件。污染敏感度是耐污染性的倒数,它是下述三个设计参数的函数。*元件本身的基本结构;*元件所采用的加工材料;*施加在零部件上的载荷。而工作条件则包括液体的各项性能,以及压力、温度和速度工作循环等的苛刻性。如前几部分所述,液体污染度是与单位时间内进入系统的粒子数与过滤器除去的粒子数的比率成正比例的。液体污染度超过元件污染允许度愈多,元件的耐污染性磨损和性能降低就愈多,使用寿命和可靠性降低也愈多(见图5—1)。污染敏感度是一个元件固有的特点,它可以用数学的方法来确定模型,并用实验方
The allowable degree of pollution of hydraulic components depends on its pollution sensitivity and working conditions. Pollution sensitivity is the inverse of stain resistance and is a function of the three design parameters described below. * The basic structure of the element itself; * The processing material used by the element; * The load applied to the part. The working conditions include the performance of the liquid, as well as the pressure, temperature and speed of the work cycle and other harshness. As mentioned in previous sections, liquid contamination is proportional to the ratio of the number of particles entering the system per unit time to the number of particles removed by the filter. The greater the degree of contamination of the liquid over the allowable levels of component contamination, the more resistant the component to fatiguing wear and degradation and the more effective the reduction in service life and reliability (see Figure 5-1). Contamination sensitivity is an inherent characteristic of a component that can be mathematically determined to model and experimentally