Composite gear rim structure for rock roller bit

牙轮钻头用复合齿圈结构

Abstract

一种牙轮钻头用复合齿圈结构由牙轮、复合齿圈、镶齿齿圈、盘式齿圈、分屑槽、齿形齿组成。所述盘式齿圈上镶若干颗硬质合金镶齿或铣若干颗钢齿。所述齿形齿包括硬质合金镶齿和钢齿。所述分屑槽是在盘式齿圈上铣削而成。所述复合齿圈结构在牙轮上的布置圈数和布置位置可根据钻头设计要求、地层性质和钻进要求进行调整。本实用新型可以解决由于材料、齿面强化及加工工艺等方面的原因引起的牙齿严重磨损或当地层性质发生变化时,牙轮钻头不能适应而导致的破岩效率低、机械转速减慢等工况问题,使牙轮钻头具有较长的工作寿命,适应不同地层的需要。
The utility model relates to a compound gear ring assembly used on a roller bit, comprising a roller, a compound gear ring, a toothed gear ring, a plate gear ring, a chip dividing groove and tooth outline teeth. Several carbide alloy teeth are inserted on the plate gear ring or several steel teeth are milling formed on the plate gear ring. Said tooth outline teeth comprise carbide alloy teeth and steel teeth; said chip dividing groove is milling formed on the plate gear ring; the locating circles and positions of said compound gear ring structure can be regulated according to the drilling bit design requirements, layer characteristic and drilling requirements. The utility model can solve the problems of serious tooth abrasion caused by material, flank strengthening or processing techniques, low rock breaking efficiency and reduced mechanical rotating speed cause by unsuitable position of the roller bit at different layers so as to increase the service life of the roller bit and enable the roller bit to be applied at different layers.

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