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牙轮钻头的工作能力受轮掌轴承耐磨性的限制,其耐磨性主要取决于轴承的工作条件,其中包括润滑状况及渗入岩粉和水的影响。现代生产的牙轮钻头,设有附属密封装置的储油腔,用以补偿轴承腔和冲洗液之间的压差,使钻头有效地工作。静力学研究表明,现行牙轮钻头轴承腔的注油工艺,不能保证充满润滑油。由于润滑油和轴承腔中含有残留空气,所以,润滑油难以
The working ability of cone bit is limited by the wear resistance of the wheel bearing, which mainly depends on the bearing working conditions, including the lubrication conditions and the infiltration of rock powder and water. A modern-produced roller cone bit has an oil reservoir for the auxiliary seal to compensate for the pressure differential between the bearing chamber and the rinse fluid, allowing the drill bit to work efficiently. Statics study shows that the current roller bearing bit cavity filling process, can not guarantee full of lubricating oil. Due to the residual oil in the oil and bearing cavity, lubricating oil is difficult