【《某洒水车喷洒动力系统的实验探究》3400字】

第第(3.21)推算得出洒水车改造前后上、下坡工况的洒水车行车距离，并测定相应的洒布宽度参数如下，其中表6.5为改造前后的上坡工况洒水车行车距离，表6.6为改造前后的上坡工况的洒布宽度，表6.7为改造前后的下坡工况洒水车行车距离，表6.6为改造前后的下坡工况的洒布宽度。表STYLEREF1\s6.SEQ表\*ARABIC\s15上坡工况洒水车行车距离统计Table6.5Speedchangeofsprinkleronuphillcondition编号改造前的洒水车行车距离/改造前的洒水车行车距离/12345abcde114.7714.6114.1014.6614.3714.2014.8514.7614.5614.85228.8328.5328.0729.0128.9028.3229.2029.2428.6229.31343.0342.9842.8342.9543.2742.7243.4843.1242.6043.33456.9757.0756.9557.3457.7657.3858.1057.3157.4158.01571.2171.1171.7371.7972.3771.7772.5872.0272.1772.44685.4585.5386.4186.3086.7686.4987.1285.9686.1787.257100.16100.09100.76100.67100.98101.00101.90100.34100.91101.41表STYLEREF1\s6.SEQ表\*ARABIC\s16上坡工况洒布宽度Table6.6Speedchangeofsprinkleronuphillcondition编号改造前的洒布宽度/改造前的洒布宽度/12345abcde16.566.996.596.926.425.735.815.425.365.8626.715.976.726.716.636.045.965.835.475.9136.696.946.836.536.605.805.685.785.865.4946.446.636.467.026.705.785.905.625.465.7956.146.627.066.806.895.385.865.476.035.5466.526.427.286.807.225.425.625.695.735.9577.126.796.476.566.235.795.415.725.395.59表STYLEREF1\s6.SEQ表\*ARABIC\s17下坡工况洒水车行车距离统计Table6.7Speedchangeofsprinkleronuphillcondition编号改造前的洒水车行车距离/改造前的洒水车行车距离/12345abcde113.8914.5613.4014.5013.7014.2613.5614.6713.8714.16228.6928.2028.1928.5527.1728.0727.0929.4127.2928.90342.0641.5742.0542.6241.4241.4740.6743.9441.3542.54456.0256.0856.1956.8055.9354.9055.4257.4755.9356.44570.2070.8970.9771.1070.4568.9569.4771.7669.5770.87684.1084.3085.7885.3285.1083.1983.3686.4282.9985.38798.2698.1199.2299.0199.0297.2397.52100.2196.3899.68为验证本文对洒水车系统特性研究成果的正确性，对表6.1至表6.8数据进行整理，对比分析洒水车改造前后发动机转速、洒水量、洒布宽度的变化情况。图6.3为上坡工况洒水车改造前后发动机转速随时间的变化情况，图6.4为上坡工况洒水车改造前后洒水量随时间的变化情况，图6.5为上坡工况洒水车改造前后洒布宽度随时间的变化情况，图6.6为下坡工况洒水车改造前后发动机转速随时间的变化情况，图6.7为下坡工况洒水车改造前后洒水量随时间的变化情况，图6.8为下坡工况洒水车改造前后洒布宽度随时间的变化情况，3幅图中“●”代表洒水车改造前的测试结果，“▼”代表洒水车改造后的测试结果。表STYLEREF1\s6.SEQ表\*ARABIC\s18下坡工况洒布宽度Table6.8Speedchangeofsprinkleronuphillcondition编号改造前的洒布宽度/改造前的洒布宽度/123451234514.504.914.164.554.656.165.725.586.305.5624.554.154.794.154.365.525.945.625.325.8534.094.674.394.524.035.945.665.545.935.6644.124.664.714.284.995.886.105.816.156.1054.084.575.164.734.516.145.955.685.665.6664.664.434.294.464.805.725.555.635.515.6474.173.824.084.324.795.285.435.475.715.55图STYLEREF1\s6.SEQ图\*ARABIC\s13上坡工况发动机转速变化情况图Figure6.3EngineSpeedChangediagraminuphillcondition图STYLEREF1\s6.SEQ图\*ARABIC\s14下坡工况发动机转速变化情况图Figure6.4Enginespeedchangediagramindownhillworkingconditions由图6.3和图6.4可知，洒水车改造前后在同一路段、同一司机的操纵下，上坡工况发动机转速维持在1400-1500，下坡工况发动机转速维持在900-1000，且没有明显规律。发动机转速在上坡路段高的原因是洒水车在上坡行驶时需要更大的扭矩，则需要加大油门，便会造成上坡路段时发动机转速大，在下坡路段低的原因是洒水车在下坡时受重力势能的加持不需要发动机提供过多的能量，便会造成下坡路段发动机转速小。图STYLEREF1\s6.SEQ图\*ARABIC\s15上坡工况洒水量变化情况图Figure6.5Changediagramofsprinklingwaterflowinuphillworkingcondition图STYLEREF1\s6.SEQ图\*ARABIC\s16下坡工况洒水量变化情况图Figure6.6Chartofchangeofsprinklerquantityunderdownhillcondition由图6.5和图6.6可知，洒水车改造前受上下坡工况发动机转速的差异性影响，洒水车在上坡工况的累计洒水消耗量明显高于下坡工况的累计洒水消耗量，对比分析改造前的洒水车平均累计洒水量，上坡工况比下坡工况多消耗87L水。洒水车改造后在上坡、下坡工况的累计洒水消耗量基本持平，证明了洒水车喷洒系统特性研究的可行性。图STYLEREF1\s6.SEQ图\*ARABIC\s17上坡工况洒布宽度变化情况图Figure6.7Changediagramofsprinklerwidthinuphillworkingcondition图STYLEREF1\s6.SEQ图\*ARABIC\s18下坡工况洒布宽度变化情况图Figure6.8Variationofsprinklerwidthunderdownhillcondition由图6.7和图6.8可知，洒水车改造前在上坡工况洒布宽度在6-7.5m范围内，下坡工况的洒布宽度在3.5-4.5m范围内，洒水车改造后洒水车在上下坡工况的洒布宽度基本稳定在5-6.5m范围内，产生这种现象的原因是在洒水车喷嘴口径确定的情况下，洒水车通过柱塞泵进行变量调节形成上下坡洒水量和喷洒压力稳定的趋势导致的洒布范围在理想范围内波动。通过工业性试验可看出改进后25吨洒水车从露天矿运输路面正常投产开始，现场试验使用至今，使用效果良好，达到了预期的效果。相较于改进前装备，具有如下优势：（1）提高水系统离心泵等部件使用寿命。应用反冲洗过滤