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燃气发电机组气门损坏的维修方法

来源:http://www.huannengpower.com   发布于:2018-07-10

气门在潍柴燃气发电机组工作中保证发动机在进气阶段能吸进尽量多的燃气混合气或空气,同时在发动机压缩和做功阶段进行可靠地密封,是整个配气系统必备部分。如果气门发生故障,势必会影响到整个潍柴燃气发电机组的运行,同时也阻碍电力稳定的输送,所以用户必须掌握一些检修气门故障的方法。下面将从专业的角度介绍一些气门故障排查的基本方法。

In the work of Weichai gas generator, the valve can ensure that the engine can absorb as much gas or air as possible in the intake stage, and it is a necessary part of the whole gas distribution system in the compression and work stage of the engine. If the valve is malfunction, it will inevitably affect the operation of the whole Weichai gas generator set, and also obstruct the transmission of power stable, so the user must master some methods to repair the valve malfunction. From the professional point of view, we will introduce some basic methods of valve trouble shooting.

仪器测量法:潍柴燃气发电机组一般使用的是螺纹接口式汽缸压力表,使用时要先将汽缸压力表螺纹接口旋入喷油器座孔内,然后用起动机带动曲轴旋转4~6s,使柴油机转速保持在300r/min左右。这时汽缸压力表所指示的压力值就是被测汽缸的压缩力。记下测量数值,然后再向汽缸内加入少量机油,转动柴油发电机,如果测 得的压力与正常什有明显的差异,说明被测汽缸的气门有故障。

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The instrument measurement method: the Weichai gas generator unit usually uses the screw interface type cylinder pressure meter, when it is used, the cylinder pressure gauge thread interface should be swirled into the nozzle of the injector, then the crankshaft is rotated 4 ~ 6S with the starter, so that the diesel engine speed is kept at about 300r/min. The pressure value indicated by the cylinder pressure gauge is the compression force of the tested cylinder. The measured values are recorded, and then a small amount of oil is added to the cylinder to turn the diesel generator. If the measured pressure is distinctly different from that of the normal, the valve of the cylinder is broken down.

经验排除法:判断气门是否发生故障要具备3个条件:潍柴燃气发电机组在运转过程中转速不稳定,排气管有“突、突”声,排烟异常(冒黑烟或蓝烟)。当柴油发电机组具备这3个条件后,再用单缸断油法来确定出现故障的汽缸。首先分别断开各缸的高压油管,观察各缸在断开高压油管前后工作状态的变化。若某缸高压油管断开后排黑烟现 象消失或减弱,说明该缸有故障。若某缸高压油管断开后排黑烟或蓝烟现象未消失,表明该缸没有故障。若分别将各高压油泵的油管断开后未发现有故障的汽缸,则应从柴油机易发生的共性故障去分析。

Experience removal method: 3 conditions are required to judge whether the valve has trouble: the speed of the Weichai gas generator unit is unstable during the operation, the exhaust pipe has a "sudden, sudden" sound, and the smoke exhaust is abnormal (black smoke or blue smoke). When the diesel generating set has these 3 conditions, the single cylinder oil cut method is used to determine the faulty cylinder. First, the high pressure oil pipes of each cylinder are disconnected, and the working state of each cylinder before and after the high pressure oil pipe is observed. If the black smoke in the rear part of a cylinder is disconnected or weakened, it is indicated that the cylinder is defective. If the high pressure oil pipe of a cylinder is broken, the black smoke or blue smoke does not disappear, indicating that the cylinder is not defective. If the cylinder of each high-pressure oil pump is not broken after the cylinder is broken, it should be analyzed from the common failure of the diesel engine.

气门在潍柴燃气发电机组起着重要作用,一旦发生故障,必须立即找专业的工作人员进行维修。气门属于易损件,当发生严重烧损或断裂时,一般应更换同一型号的新品。若在锥面上出现积碳过多、麻点或锈蚀面积较小时,可用气门研磨机或手工进行研磨,以达到气门密封燃烧室的效果。工作人员在排查检修时一定要细心耐心,同时注意问题的总结与记录,及时积累相关经验,以预防气门故障的再次发生。

The valve plays an important role in Weichai gas generator set. Once a fault occurs, it is necessary to find professional staff immediately for repair. Valve is a fragile part. When a serious burn or break occurs, the same type of new product should be replaced. If there is too much carbon in the cone, the hourly or rusted area is small, it can be grinded by a valve grinder or by hand in order to achieve the effect of the valve seal combustor. The staff must be careful and patient during the inspection and repair. At the same time, we should pay attention to the summary and record of the problems and accumulate relevant experience in time in order to prevent the recurrence of the valve malfunction.


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