论文部分内容阅读
为提高排气门的工作可靠性,目前采用下述措施:锥面堆焊耐热合金,表面镀特种涂层,强化气门盘和气门座的冷却;使屏蔽工作面免受强烈热流的作用;使工作面的温度均匀分布。根据经验,最合适的措施是堆焊耐热合金和采用排气门转动装置。苏联第8789T9号发明证书介绍的排气门转动装置,比目前世界上广泛使用的型转动装置更为优越。这种装置的棘轮机构由齿端面呈三角形的棘轮和弹簧掣子所组成。掣子通过销子与气门摇臂活接。棘轮刚性地固定在气门杆的端部,而掣
In order to improve the reliability of the exhaust valve, the following measures are adopted at present: cone surfacing heat-resistant alloy, special coating on the surface, strengthening valve disc and valve seat cooling; shielding the working face from intense heat flow; Make face temperature evenly distributed. According to experience, the most suitable measures are heat-resistant alloy surfacing and exhaust valve rotation device. The Soviet Union’s No. 8789T9 certificate of invention introduced the exhaust valve rotating device, the world’s widely used than the type of rotating device even more superior. The ratchet mechanism of this device consists of a triangular ratchet and spring detent with tooth flanks. The latch engages the valve rocker through the pin. Ratchet rigidly fixed to the end of the valve stem, and the latch