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    • 1. 发明授权
    • Glow plug structure
    • 辉光插头结构
    • US4200077A
    • 1980-04-29
    • US942045
    • 1978-09-13
    • Gunther KauhlHannes PflugLeo Steinke
    • Gunther KauhlHannes PflugLeo Steinke
    • F02P19/00F23Q7/00H05B3/00
    • F23Q7/001Y10T29/49085
    • To prevent damage to the heating wire of an electrically heated glow plug due to non-uniform expansion of materials within the glow plug upon heating thereof, and particularly due to excessive expansion of filler material surrounding a spiraled heating wire, the filler material is made in two sections, one being located within the spiral of the heater wire and comprising a material of a thermal conductivity of expansion approximately matching that of the heater wire, typically high-temperature annealed aluminum oxide, magnesium aluminum spinel, silicon nitride, boron nitride, silicon carbide, or the like, the outer section between the heater wire and the inner wall of the glow tube being of a material of good heat conductivity, such as magnesium oxide. In manufacture, the first material is introduced into the heater wire spiral in the form of a compacted rod which, after assembly to the tube and introduction of the second material, is crushed by diametrical reduction of the tube after closing thereof, for example by hammering, rolling or swaging.
    • 为了防止由于加热电热塞中的材料的不均匀膨胀而导致的电加热的电热塞的发热丝的损坏,特别是由于围绕螺旋加热线的填充材料的过度膨胀,填充材料被制成 两个部分,一个位于加热丝线的螺旋内,并且包括具有与加热丝线(通常是高温退火的氧化铝,镁铝尖晶石,氮化硅,氮化硼,硅 碳化物等,加热线与辉光管的内壁之间的外部部分是具有良好导热性的材料,例如氧化镁。 在制造中,将第一种材料引入到加压丝螺旋形中,其形式为压紧棒,在组装到管之后并且第二种材料的引入在其封闭之后通过管的直径减小而被压碎,例如通过锤击 ,滚动或模锻。