吉尔130汽车发动机供油系统O形密封圈的研制

Development of O-ring in Engine Fuel System of Geer 130 Model Automobile

含有活性添加剂的Ｍ－８＿Ｂ１和Ｍ－８＿Ｔ２Ｋ的两种油品对ＮＢＲ－１８Ｏ形密封圈有一定的副作用，通过调整ＮＢＲ胶料硫化体系（硫黄０．３；促进剂ＣＺ１．５；促进剂Ｍ０．５；硫化剂ＤＣＰ２．０）和补强剂炭黑的用量（高耐磨炭黑５５；喷雾炭黑４０）．可以使其满足抗两种油品侵蚀的性能要求。另外，在ＮＢＲ胶料中添加２５份耐寒增塑剂（邻苯二甲酸二丁酯１０；癸二酸二辛酯１５）．可提高胶料的耐低温性能，并使脆性温度降至－６５℃以下。

An adverse effect of two active additive containing oils M-8 _B1 and M-8 _T2K was foundon NBR-18 O-ring in the engine fuel system. The resistance of O-ring to the two oils could be improved by the adjustment of curing system (sulfur 0. 3 phr;accelerator CZ 1. 5 phr;accelerator M 0. 5 phr;DCP 2. 0 phr) and carbon black level (HAF 55 phr;sprayed carbon black40 phr). In addition, 25 phr of cold resistant plasticizer (dibutyl phthalate 10 phr;dioctyl sebacate 15 phr) were added into NBR compound to improve the cold resistance of the compound and lower its brittle temperature to - 65℃.