水稻插秧机大田作业技术

1、插秧机作业前的调整与准备工作 1.1加油和注润滑油 检查油箱是否加上汽油或柴油，活动踏板、秧箱支持臂、运秧器轴是否加黄油、发动机曲轴箱、齿轮箱、插秧臂、各个支点和连接部分是否注入机油。

备耕农机维修九窍门

相对于采用专用农机故障诊断设备进行检测维修而言,某些简便易行的、经过长期实践检验证明行之有效的人工诊断与修理方法,更适合农民机手采用。一、巧用喷油器安装孔如果发动机有一个或多个气缸的压缩压力过低,可以从喷油器（或者火花塞）安装孔注入5毫升左右机油,然后摇转曲轴,再测量气缸的压缩压力。如果注入机油以后,气缸的压缩压力普遍提高,但是仍然低于标准值,说明是气门密封不严或气缸垫泄漏;如果相邻两个气缸的压缩压力明显偏低,说明气缸垫在这2个气缸之间被冲坏。

备耕农机维修九窍门

相对于采用专用农机故障诊断设备进行检测维修而言,某些简便易行的、经过长期实践检验证明行这有效的人工诊断与修理方法,更适合农民机手采用。（1）巧用喷油器安装孔。如果发动机有一个或多个气缸的压缩压力过低,可以从喷油器（或者火花塞）安装孔注入5毫升左右机油,然后摇转曲轴,再测量气缸的压缩压力。如果注入机油以后,气缸的压缩压力普遍提高,但是仍然低于标准值,说明是气门密封不严或气缸垫泄漏;

Combustion Characteristics and Emission of a Two-Stroke Compression Ignition Engine with Two-Stage Injection

In order to study the effect of two-stage injection on two-stroke diesel engines, a well characterized research engine equipped with electronically controlled common rail system and scavenging system was constructed. Through analysis of combustion and emissions, two-stage injection shows its advantages. Compared with the standard injection, it produces less emissions, while compared with single early injection, it expands engine operation range. Further experiments were carried out to study the influence of several injection control parameters on two-stage injection. The fuel in the first injection is used for forming homogeneous mixture. The fuel in the second injection keeps combustion, and it is the main source of smoke emissions. NO_x is formed in both combustion process caused by these two injections, and there is an optimum fuel allocation ration to produce minimum NO_x. The cylinder pressure decreases, and the combustion is depressed with the increasing of scavenging pressure. By optimizing the injection control parameters of two-stage injection, NO_x and smoke can be reduced beyond 30% simultaneously.

一句话经验3则

（1）如果所耕地块土质干硬，犁铲入土较困难，可在开墒前先在地头上横耕一犁。 （2）柴油机放置时间较长或更换活塞和气缸套后，启动前可向气缸内注入适量的机油．以提高其密封性和润滑性能．改善启动条件．延长使用寿命。单缸机可从进气管注入机油，而多缸机就不能用此法，否则注入的机油会完全被吸入某个气缸．形成油垫。这样．不仅其他缸的密封性没能改善。更危险的是，形成油垫的某个缸还可能导致捣缸事故。正确做法是，拆下各缸的喷油器，逐缸注入适量的机油。