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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >SURFACE ROUGHNESS EFFECTS ON HYDRODYNAMIC LUBRICATION AND SCUFFING FAILURE ANALYSIS OF AXIALLY GROOVED PLUNGER OF A ROTARY DIESEL FUEL INJECTION PUMP
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SURFACE ROUGHNESS EFFECTS ON HYDRODYNAMIC LUBRICATION AND SCUFFING FAILURE ANALYSIS OF AXIALLY GROOVED PLUNGER OF A ROTARY DIESEL FUEL INJECTION PUMP

机译：旋转式燃油喷射泵轴向沟槽柱塞的水力润滑及刮擦失效分析的表面粗糙度影响

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摘要

The wear between the plunger and plunger sleeve of rotary diesel fuel injection pump causes considerable decrease in injection pressure and the quantity of fuel to combustion chamber of an engine, which ultimately leads to failure of engine assembly. This research investigates the cause of failure particularly focusing on surface roughness effects to hydrodynamic lubrication and scuffing failure due to abrasive contaminant. The surface roughness of plunger and plunger sleeve were measured and incorporated in Reynolds equation to analyze roughness effects on hydrodynamic lubrication. The critical particle size of the dust normally present in the diesel fuel is evaluated to determine which test dust sample could cause systems to fail. Based on this information, scuffing failure of pumps due to an abrasive contaminant partially penetrated in the plunger sleeve is analyzed. The abrasive contaminant is modeled as a spherical shaped rigid particle. Excessive temperature rise between the particle-plunger interface is used as an indication of whether scuffing would take place. Experiments were conducted to determine parameters such as particle size of dust samples, surface roughness of plunger and plunger sleeve, specific heat of diesel fuel, diesel fuel density, quantity of fuel flow and radial clearance. These experimentally determined parameters are then used as input in our computer program to lend more confidence to our predicted results.
机译：旋转柴油​​燃料喷射泵的柱塞和柱塞套筒之间的磨损导致喷射压力和流向发动机燃烧室的燃料量显着下降，最终导致发动机组件故障。这项研究调查了故障的原因，尤其集中在表面粗糙度对流体动力润滑的影响以及由于磨料污染导致的划伤故障上。测量了柱塞和柱塞套筒的表面粗糙度，并将其纳入雷诺方程，以分析粗糙度对流体动力润滑的影响。评估通常存在于柴油中的粉尘的临界粒度，以确定哪些测试粉尘样品可能导致系统故障。基于此信息，分析了由于部分渗透到柱塞套筒中的磨蚀性污染物引起的泵的划伤故障。将磨料污染物建模为球形刚性颗粒。颗粒-柱塞界面之间的过度温升被用作是否发生划伤的指示。进行实验以确定参数，例如灰尘样品的粒度，柱塞和柱塞套的表面粗糙度，柴油比热，柴油密度，燃油流量和径向游隙。然后将这些实验确定的参数用作我们计算机程序中的输入，以使我们的预测结果更有信心。

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