按牙轮轴偏移或牙轮角偏移原理设计的牙轮钻头运转中将产生滑移现象,而经常性的滑移将加快轮齿的磨损,最终导致钻头的过早报废。我国从美国德莱塞公司、休斯公司和利德公司分别引进了三种牙轮钻头:9×(7/8)″HIOMJ型、9×(7/8)″HH99型和M83型。它们都是按纯滚动原理设计的,是否在运转中也有滑移呢?为了验证这个问题,必须 A roller cone bit designed according to the principle of roller axis deviation or roller angle offset will cause slippage while the regular slip will accelerate the wear of the tooth and eventually lead to the premature scrap of the bit. In China, three kinds of roller cone drill bits are introduced respectively from Dreiser, Hughes and Reid: 9 × (7/8) “HIOMJ type, 9 × (7/8)” HH99 type and M83 type. They are designed according to the principle of pure rolling, whether there is sliding in operation? In order to verify this problem, you must