【摘要】 传统的大功率三缸钻井泵的曲轴传动结构采用单侧啮合人字齿轮传递动力,由于齿轮位于曲轴的一端,当另一端的两个曲柄受力时,曲轴的应力和形变最大。为减轻这种状况,部分大功率钻井泵的曲轴传动结构采用了双侧啮合斜齿轮来传递动力。针对这种曲轴传动结构推导出曲轴上两个斜齿轮的啮合力、轴承的支反力以及曲轴各个截面突变处的扭矩和弯矩公式,对该曲轴进行强度校核,应用ANSYS workbench进行有限元法强度分析。分析结果表明,双侧斜齿轮传动曲轴在中间曲柄两侧最危险截面上最大应力比传统传动曲轴分别降低21.3%和11.5%,且最大变形量比传统传动曲轴降低45.3%,强度和刚度得到提高,同时适当增加曲轴上各圆角值,可提高曲轴的强度。更多还原

【Abstract】 Crankshaft drive structure in traditional high-power three cylinder drilling pump uses a pair of meshing herringbone gears to transmit power.As the gear is located at one end of the crankshaft,the stresses and deformation of the crankshaft are the biggest when the other end of the two cranks are stressed.In order to alleviate this situation,the crankshaft drive structure of some high-power drilling pump uses two pairs of meshing helical gears to transmit power.For this kind of crankshaft drive structure,the formulas of two gears meshing force,bearing reaction force and torque and bending moment at the cross-section mutation are deduced.The strength of the crankshaft was checked,and the strength analysis via finite element method was done by using workbench ANSYS.The analysis results show that the maximum stresses on the most dangerous section on both sides of the middle crank of the transmission crankshaft with double side helical gear are reduced by 21.3% and 11.5% respectively comparing with the traditional transmission crankshaft.And the maximum deformation is of 45.3% lower than that of the traditional transmission crankshaft,the strength and stiffness are improved.At the same time,it can improve the strength of crankshaft by appropriately increasing the fillet value of the crankshaft.更多还原