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首页> 外文期刊>International Journal of Applied Engineering Research >Distribution of an Axial Load along the Teeth Rows of Rolling Cutters of Drill Bits (Test Results)
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Distribution of an Axial Load along the Teeth Rows of Rolling Cutters of Drill Bits (Test Results)

机译:沿钻头滚动切割器的齿排轴向载荷的分布(测试结果)

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摘要

The durability of cutting elements and bearings of roller cutter drill bits depend on load level of their components. A considerable number of analytical and experimental studies are devoted to the study of regularities of distribution of efforts along the teeth of the cutting elements and roller bearing supports of drill bits. For experimental measurement of value of efforts, acting on separate teeth of each rolling cutter of the drill bit in the process of overrolling of drill bit under the load on metal bore-hole bottom, there was constructed the measuring device and special stand. This stand provides the possibility of testing of the drill bits of various standard types and sizes with a minimum expenditure of time and materials. The choice of the standard types of the drill bits is justified to conduct the research and of the testing methodology. The results of the research are suggested of distribution of axial load amoung the teeth rows of rolling cutters of drill bits with hardalloy and milled inserts. The results obtained made it possible to establish that the load on the teeth rows of rolling cutters distributes quite unevenly, and the intermediate teeth rows of rolling cutters are most loaded. At this, this unevenness remains unchanged at different constructive design of cutting elements. The distribution of axial load along the rolling cutters of drill bits is also uneven, the maximum axial load is taken by the first roller cutter, the minimum - by the third. However, the degree of unevenness of distribution of an axial load along the rolling cutters depend largely on constructive design and mainly on the location of teeth rows on rolling cutters alond the radius of the drill bit, which is especially significant for drill bits with hard-alloy inserts. It is established that the nature of the distribution of the axial loads along the teeth rows is related to the design of the rolling cutter support assembly. To reduce the unevenness of the distribution of an axial load between the teeth rows and the rolling cutters, it is necessary to change the scheme of interaction with the bore-hole bottom.
机译:切割元件的耐久性和滚筒刀具钻头的轴承取决于其组件的负载水平。大量的分析和实验研究旨在研究沿着切割元件和滚筒轴承支撑件的齿齿的齿分布的规律性研究。对于努力的实验测量,在钻头在金属钻孔底部的负载下推出钻头的钻头的每个滚动刀具的单独齿上,构造了测量装置和特殊支架。该支架提供了在最小时间和材料的最低支出的各种标准类型和尺寸的测试的可能性。标准类型的钻头的选择是合理的,以进行研究和测试方法。建议研究轴向载荷的分布轴承钻头的齿排用硬质和铣削刀片的滚动切割器的分布。获得的结果使得可以建立滚动切割器的齿行上的负载非常不均匀地分布,并且轧制切割器的中间齿行最负载。这样,这种不均匀性在切割元件的不同建设性设计中保持不变。沿钻头的滚动切割器的轴向载荷的分布也不均匀,最大轴向载荷由第一滚轮刀具,最小 - 第三。然而,沿轧制切割器的轴向载荷分布的分布的不均匀程度主要取决于建设性设计,并且主要在滚动切割器上的齿行的位置呈现钻头的半径,这对于具有硬的钻头尤为重要合金刀片。建立沿着齿行的轴向载荷分布的性质与滚动切割件支撑组件的设计有关。为了减少齿行和滚动切割器之间的轴向载荷分布的不均匀性,需要改变与钻孔底部的相互作用方案。

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