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    • 4. 发明授权
    • Hydrodynamic pump passages for rolling cone drill bit
    • 用于滚动锥钻头的流体动力泵通道
    • US07128171B2
    • 2006-10-31
    • US10784339
    • 2004-02-23
    • Aaron J. DickChih C. Lin
    • Aaron J. DickChih C. Lin
    • E21B10/24E21B10/18
    • E21B10/246
    • An earth boring bit has rotating cones with two lubricant passages to increase bearing capacity and cause lubricant circulation. A lubricant reservoir in the body supplies lubricant to passages between the cone and bearing pin. A pressure compensator equalizes lubricant pressure to the exterior of the bit. A first passage leads from the reservoir to the upper side of the bearing pin. A second passage leads from the reservoir to the bearing pin at a point from 185 degrees to 225 degrees as seen from an inner end of the bearing pin. This point is located in a diverging region 51d of an annular clearance surrounding the bearing pin.
    • 地球钻头具有带有两个润滑剂通道的旋转锥体,以增加承载能力并引起润滑剂循环。 体内的润滑剂储存器向锥体和轴承销之间的通道提供润滑剂。 压力补偿器将润滑剂压力与钻头的外部相等。 第一通道从储存器引导到轴承销的上侧。 第二通道从轴承销的内端看,从185度到225度的位置从储液器引导到轴承销。 该点位于围绕轴承销的环形间隙的发散区域51d中。