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<h1 class="h1">机油冷却器的功能和解体策略</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: 2024-07-13　　访问量:3227</div>
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<p>摘要：机油冷却器的功能是用来冷却机油，使机油温度保持在较有利的温度范围内，以保证机油具有正常的润滑作用。机油在柴油发电机发热区工作时，吸收了大量的热量，同时机油又作为冷却介质来冷却活塞，而使机油温度升高，机油粘度下降，机油还容易氧化变质。因此，必须及时降低机油的温度，以保持柴油发电机的正常作业。</p><p>&nbsp; &nbsp; &nbsp; 机油冷却器的用途是冷却润滑油，使油温保持在正常工作范围内。在大容量强化发动机上，由于热负载大，必须装配机油冷却器。发动机运行时，随着温度的升高，机油粘度变稀，降低了润滑能力。因此，有些发动机装有机油冷却器，其功能是降低机油的温度，使润滑油保持一定的粘度。机油冷却器设计在润滑系统的循环油路中。</p><p>&nbsp; &nbsp; &nbsp; 全流量（也称水冷机油冷却器）其实就是一个液-液热交换器。热质是机油，防冻液是水。通常，这种热交换器中的油进入管内，水进入壳程。一般采用逆流换热，即油的出口和水的入口在换热器的同一端。因为油和水之间的热交换非常好，总传热系数应当不低于1000 W/m2.K，故而设计应当相当紧凑，油可以冷却到入口水温加几摄氏度（例如5度）。实际冷却效果取决于水/油流量比。水流越大，冷却效果越好。</p><p>&nbsp; &nbsp; &nbsp; 康明斯6BT型柴油发电机采用全流量冷却式（FFC）和大凸轮机型的机油冷却器，外形如图1所示。机油冷却器由芯子（是由很多直径相同的纯铜管及沿轴向交叉设计的隔板构造）、冷却器体和盖等构成。油流在纯铜管外，由前向后沿轴向绕隔板上下流动。防锈水由后向前从管内流过，使机油温度保持一定范围内。在全流量冷却式（FFC）润滑的柴油发电机上，机油冷却器前支架中有调压阀。调压阀控制滤清器前的机油压力。在变流量冷却式（DFC）润滑装置的机油冷却器中具有具有温度控制开、关的旁通阀，以控制流过冷却器的机油量。当温度低于110℃时旁通阀关闭，只有约一半的机油量流过冷却器。当机油温度高于110℃时旁通阀打开，所以全部机油通过冷却器。</p><p>&nbsp; &nbsp; &nbsp; 康明斯K38型和K50型柴油发电机机油冷却器采用板翅式热交换器，外形如图2所示。冷却器芯装于缸体中间的主油道内。冷却器的O形密封圈已经改过，新型O形密封圈有两条红带，这样的O形密封圈的材料接触机油后会迅速胀大。因此，将冷却器芯装入机体时一定要用植物油润滑O形圈。O形密封圈不能重复使用。</p><p>&nbsp; &nbsp; &nbsp; 机油冷却器是一种加载润滑机油散热使其保持过低温度的装备。在高性能、大功率的强化发动机上，因为热负荷大，必须装设机油冷却器。机油冷却器设计在润滑油路中，其作业机理与散热器相同。机油冷却器由铝合金铸成的机油冷却器盖、板翅钎焊的机油冷却器芯组成。冷却液在机油冷却器盖和机体围城的空间内流动，润滑油在板翅内流动。板翅式机油冷却器传热过程主要是通过翅片的热传导以及翅片与防冻液之间的热对流来完成的。保证机油温度（90℃-120℃）和粘度在合理范围内；通常安装在发动机机体上，装配时与机冷盖一体进行安装。</p><p>&nbsp; &nbsp; &nbsp; &nbsp;拆下每个机油冷却器总成上的四个螺母和机油冷却器芯，如图7所示。拆下并废弃每个机油冷却器总成的六个 O 形圈和两个密封垫。拆装对策如图8所示，从机油冷却器盖上拆下以下部件：</p><p>&nbsp; &nbsp; &nbsp; 如发现任何碎屑或柴油发电机有碎屑致使的损坏，替换机油冷却器芯、发动机机油和机油滤清器。</p><p>（2）如如9所示。使用蒸汽或热的高压水，擦净冷却器芯的外部，冲洗冷却器芯的内部，彻底解除里面的机油。最后用压缩空气吹干冷却器芯。</p><p>（4）检验盖和壳体是否有裂纹，如图10所示。如果怀疑有泄漏，应操作染色渗透剂来查找泄漏根源。</p><p>（5）查看盖和壳体是否受到腐蚀。检验冷却器芯的外部有无由冷却水中的物质生成的水垢。如发现有明显的水垢，用清洁散热器内部的举措清洁冷却器芯的外部。</p><p>（1）圆盘阀的凸面必须面向机油冷却器壳体内部且远离节温器。没有正确安装此部件将会损坏发动机。</p><p>（2）在机油冷却器盖上重新组装由途径2解体的部件。拧紧盖螺钉，功率值：31n?m；拧紧机油冷却器塞。</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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