97超碰人人人人人-色却av久久综合精品国产-久久伊人91精品综合网站-久久久2020中文字幕-四虎永久在线精品免费中文字幕-亚洲欧美日韩综合久久-国产欧美另类精品久久久-午夜精品久久久久久久爽懂色-色婷婷综合久久久久国产精品中文,久久精品视频亚洲精品视频,蜜臀aⅴ人妻一区二区三区,97久久啪啪激情av

Development of metallurgical machinery gear theory and manufacturing processes will be further study the mechanism of tooth damage, which is to establish a reliable method of strength calculation basis is to improve the carrying capacity of gears, gear extended theoretical basis of life; the development of a circular arc tooth profile the new tooth representatives; study new materials and manufacturing gear gear new technology; the elastic deformation of gear research, manufacture and installation errors, and the distribution of temperature field, performed tooth modification to improve the smoothness of running gear and at full load increases the contact area between the teeth, thereby enhancing the carrying capacity of gears.

Friction, lubrication technology lubrication theory and metallurgical machinery gears basic research work on the elastic hydrodynamic lubrication theory, promote the use of synthetic lubricants and extreme pressure additives added as appropriate in oil, not only can increase the carrying capacity of the tooth surface but also can improve the transmission efficiency.