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矿用牙轮穿孔须有足够的风量用于清除被破碎的岩粉,使孔底露出新鲜岩面给钻齿能最有效地再次破碎。空气流将岩渣通过钻孔环形空间及时地排出地表,与此同时,还应有一定量的压风通过牙爪风道进入钻头轴承,以便带走滚珠、滚柱轴承及轴颈和衬套表面的热量,清洗轴承,以保障钻头应有的寿命。风量的大小及其合理配比对穿孔速度、钻头寿命、穿孔成本有
The perforation of the mining cone shall have sufficient air volume to remove the crushed rock powder and expose the fresh rock face to the bottom of the hole so that the drilling teeth can be crushed again most effectively. Air flow will rock residue through the drilling annular space and timely discharge from the surface, at the same time, there should be a certain amount of compressed air through the claw duct into the bit bearing, in order to take away the ball, roller bearings and journal and bushing surface The heat, cleaning bearings, to protect the bit life expectancy. The size of the air volume and its reasonable ratio of perforation speed, bit life, perforation costs