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任何内燃机的气门与弹簧盘的联接都应该是绝对可靠的,否则一旦脱落,就会造成捣毁缸体和缸盖的恶性事故。近几年来.由于EQ140型汽车发动机气门与弹簧盘联接不良而酿成的恶性事故,时有发生。经拆检发现,由于EQ140型汽车气门弹簧锁片锥度α1太小,当弹簧盘孔尺寸位于公差上限,而锁片(两个半片)直径尺寸处于公差下限时(见右图),锁片陷入弹簧盘内过深,配合部分过少,工作时间一长,便容易磨损脱落。
Any internal combustion engine valve and spring disc coupling should be absolutely reliable, otherwise once off, it will cause the destruction of the cylinder and cylinder head of the vicious accident. In recent years, as EQ140-type car engine valve and spring disk bad connection caused by the vicious accident, from time to time. After the demolition found that, as the EQ140-type automotive valve spring lock taper α1 is too small, when the spring plate hole size is located in the upper tolerance limit, and the lock (two half-piece) diameter size is in the lower limit of tolerance Spring disk too deep, with the part too little, a long working time, it is easy to wear off.