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在目前我国沿海船舶中,燃烧渣油的主锅炉已占相当数量。对这类船舶在实现主锅炉自动点火系统的研究中,如何点火是个关键问题。假如能使具有一定油压、油温并经喷油咀喷出的渣油直接由点火器点燃,那末,这就为实现锅炉自动点火创造了有利条件。本文所介绍的就是这种能直接点燃渣油的拉弧式点火器。 去年,我们在“工农兵13号”轮（船上电沅为直流110V）上搞技改时,试制了一种低压拉弧式点火器,经现场试验,效果良好,现就其结构和动作原理作一简单介绍。 结构:图1示出低压拉弧式点火器的简单结构。图中7为支架,在7上固定着筒形电磁线圈8,7上有导板4,可在滑槽中移动,导板一端与衔铁10连接一起,导板上方同时带有两根彼此绝缘的电极5,其中上面一根套有弹簧的上电极,可在导板支架的小孔中前后移动,下面那根电极则被固定住。可动铁心2外部套有压缩弹簧6。其它部件见图1。
At present, China’s coastal ships, the main boiler burning residual oil has accounted for a considerable amount. How to ignite these vessels is a key issue in the study of the automatic ignition system of such boilers. If we can make a certain oil pressure, the oil temperature and jet nozzle by the ignition directly ignited, then, which for the realization of automatic ignition of the boiler to create favorable conditions. Described in this article is that this kind of arc ignition can ignite the lighter directly. Last year, when we engaged in technological innovation in the “Workers, Peasants and Soldiers No. 13” (110MW DC on board the ship), a low-voltage arc-type igniter was tried and produced. After field tests, the effect was good and its structure and operation principle Make a brief introduction Structure: Fig. 1 shows a simple structure of a low-voltage arc ignition device. Figure 7 is a bracket on the 7 fixed cylindrical electromagnetic coil 8, 7 has a guide plate 4, can move in the chute, one end of the guide plate is connected with the armature 10, above the guide plate with two electrodes 5 insulated from each other, Above which a spring-loaded upper electrode, can be moved back and forth in the hole in the guide plate bracket, the electrode is fixed below that live. The movable iron core 2 is provided with a compression spring 6 outside. Other components shown in Figure 1.