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发动机在严寒条件下启动,往往需要一个空气加热器,使其产生的热空气,由热风管道输入到发动机周围,使发动机在低温条件下予热后能迅速启动。热风导管是用橡胶帆布制成,管中用弹簧作骨架,不用时此风管可以压缩很短,便于保存,若需要使用时,只要打开管外的锁扣,风管由弹簧的弹力作用下迅速张开。该弹簧是我厂生产的,对这个特别长弹簧(图1)热处理工艺是在普通常用热处理设备中进行的,通过几年来的生产实践,证实了此工艺确实可行,收到良好效果,现将工艺阐述如下,供作参考。
When the engine is started under severe cold conditions, an air heater is often required. The hot air generated by the engine is input to the engine by the hot air duct so that the engine can be started quickly after preheating under low temperature conditions. The hot air duct is made of rubber canvas, and the spring is used as the skeleton in the tube. When not in use, the air duct can be compressed very short, so it is easy to store. If it is needed, just open the lock on the outside of the tube and the air duct is under the action of the elastic force of the spring. Open quickly. The spring is produced by our factory. The heat treatment process for this special long spring (Fig. 1) is carried out in common common heat treatment equipment. Through several years of production practice, it is confirmed that this process is feasible and has received good results. The process is described below for reference.