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在正常工作条件下,一台技术状况良好的柴油机曲轴箱内的平均压力应为负值;但是,随着气缸、活塞组件磨损的增大,燃烧废气窜入曲轴箱将逐渐增多。据测定,95系列柴油机每缸每分钟约有6升废气窜入曲轴箱,使曲轴箱内的平均压力增高,以致形成正压。曲轴箱呈正压会带来许多弊病。首先,促使机油从活塞环处上窜或从气阀导管处下窜进入燃烧室烧掉;其次,促使密封面渗油,据资料介绍,曲轴箱内气压高于大气压千分之三时就会破坏油密性而渗油;再次,由于废气窜入曲轴箱使滑油温度升高,导致滑油老化变质,降低其润滑性能。因此,柴油机运行过程中必须使曲轴箱保持一定的负压,有效避免滑油烧损、渗漏和老化变质现象,以达到节油目的。安装呼吸器是
Under normal operating conditions, the average pressure in a good condition diesel engine crankcase should be negative; however, as the wear of cylinder and piston assembly increases, the combustion exhaust gas flushes into the crankcase will gradually increase. It is determined that 95 series diesel engine per cylinder per minute about 6 liters of fled into the crankcase exhaust gas, so that the average crankcase pressure increased, resulting in a positive pressure. Positive pressure on the crankcase will bring many disadvantages. First of all, to promote oil from the piston ring channeling or channeling from the valve into the combustion chamber burned down; Second, to promote the sealing surface seepage, according to the information, the crankcase pressure is higher than the atmospheric pressure of three thousandths will be Destroy the oil tightness and infiltration; Third, because the exhaust gas fleeing into the crankcase so that the oil temperature, leading to deterioration of oil aging, reducing its lubricating properties. Therefore, the diesel engine must be maintained during the operation of a certain negative pressure crankcase, effectively prevent the burning oil, leakage and deterioration of the phenomenon, in order to achieve fuel-efficient purposes. Install respirator Yes