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<h1 class="h1">柴油发电机喷油嘴的技术型谱、安装顺序和仿真试验</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2025-03-24　　访问量:826</div>
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<p>喷油泵的喷油压力、雾化质量、喷雾锥角和针阀的密封性应符合康明斯柴油发电机使用手册规定的技术数据。喷油嘴性能的检测主要包括喷油咀开始喷射压力的严查与调整，喷雾质量、密封性能的察看等。喷油器的试验应在专用的试验器上进行。试验器由手油泵、油箱压力表等构造。油箱的柴油经过滤清流入手油泵的 油腔中，压动手油泵泵油时，高压油经油阀流入压力表和喷油嘴，使喷油嘴喷油。喷油压力及其变化情形可以从压力表上读出。</p><p>（1）从柴油发电机上拆下喷油泵后，要将它固定在校验台上，然后对喷油咀的喷油压力、雾化质较、喷油角度和针阀的密封性进行察看。若在试验时发现喷油器的喷射压力过低或偏高，应拆下喷油嘴护冒，松开调压锁紧螺母，然后用一平口螺丝刀对调压螺钉进行调节。若经过调整后故障不能解决，这时应将喷油嘴固定在台虎钳上，然后用通用工具把喷油嘴偶件的紧帽拆下<a href="http://www.gdkmsfdj.com" target="_blank">康明斯柴油发电机结构图</a>。当紧帽锈蚀而难以拆下时，应将喷油器放入柴油或柴油中浸泡10min左右，然后再进行拆除。绝对不可用很大的力解体紧帽，否则会使喷油咀体顶部的定位销折断。&nbsp; &nbsp;&nbsp;</p><p>验看喷油器的喷油压力及喷雾质量时，可预先自制一个丁字形带接头的三通，其中一个接头装在燃油泵的任一分泵上，一个接头装上新的标准喷油咀，另一个接头安装被测喷油咀。察看喷油开启压力的举措，用起动马达带发电机转动，观察两个喷油泵，是否同时喷油，若同时喷油，则说明被测喷油器的喷油压力符合要求。否则应根据喷油开始的迟早，通过喷油泵调压螺钉进行调节。可在两个喷油嘴喷油的同时，观察其喷雾品质。若两个喷油嘴的喷雾情形相同，说明被测者良好。也可借助一张纸铺在板上对正喷嘴，两个喷油咀的喷嘴与平板的距离相等用直尺测定后定位，，用起动马达带发电机转动使两个喷油泵同时喷一次油于纸上，严查喷出的两个油迹范围和均匀度是否相同。若两油迹不一样，应察看被测者的喷孔内有无积炭或异物，若有应予以解决。若被测者的油迹面积小于标准喷油咀喷出的油迹面积，说明其喷雾锥角不够，应严查喷孔是否烧蚀，必要时更替一副喷嘴。</p><p>喷油压力的察看与调节。将喷油咀装配在测试器上，压动手柄排净装置内的空气，再快速压动手柄几次，解除喷油器内的积碳。然后慢慢压动手柄同时观察压力表，当喷油泵喷射时，压力表指针会摆动，指针 刚摆动时的压力值即为喷油压力，此值应符合标准。若油压过低，则拧入油压调节螺钉;反之，则退出油压调整螺钉。调整完后，须将锁止螺母锁紧后重试<a href="http://www.gdkmsfdj.com" target="_blank">柴油机故障码一览表</a>。有些喷油嘴无调整螺钉(如依维柯SOFIM8140.27发电机)，则应分解喷油咀，更替调整垫片。</p><p>为了合理控制喷油持续期，同时获得良好的喷雾贯穿距及雾化效果，康明斯发电机组通常采用增加喷孔孔数减轻喷孔直径的喷孔办法。但随喷孔数增多，喷雾之间易相互干扰，喷雾范围受到限制，燃烧室空间无法充分利用，从而影响柴油发电机性能与排放，而且喷孔之间壁厚减轻，会对油嘴可靠性带来影响。因此某型康明斯柴油发电机其喷嘴采用了12孔，双层布置，上下各6个，喷孔呈交错布局的形式</p><p>。上下2排孔喷射夹角和喷孔直径一致。该喷嘴在定容弹内，通偏高速摄影测试喷雾宏观特性时，发现在相同喷射时刻<a href="http://www.gdkmsfdj.com" target="_blank">无锡康明斯发电机有限公司</a>，上下2层喷孔的喷雾贯穿距明显不一样，这与单层喷孔喷雾贯穿距特点有较大差别。</p><p>图1所示。出口边界为定压边界，即喷雾弹内背压为3 MPa。截取喷油器1/6作为计算域所发生的2个截面为周期性边界条件，通过该周期性边界无压力降。壁面温度为293 K，其表面流速无滑移并忽略传热，近壁区采用标准壁面函数法处理。</p><p>图1所示，喷油持续期为tms，喷油量为3 300 mm3，燃油温度为40 ℃，喷雾弹内气体温度为25 ℃，气体成分为N2，等效气体密度34.5 kg/m3。&nbsp;</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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