牙轮钻头密封试验技术研究及密封圈性能评价OA北大核心CSTPCD

Cone bit in deep drilling is subject to multiple factors such as high temperature,high pressure,friction and corrosion during deep well drilling,which directly affect the service life of the seal ring,and then affect the life of the bit.Therefore,the sealing test technology of cone bit was studied.Firstly,the sealing test machine of cone bit was designed,and its functional modules were designed;secondly,the sealing performances of O-shaped rubber seal ring and radially symmetrical flat rubber seal ring under the influence of multiple factors were analyzed by finite element method,and the contact stress judge criterion and von Mises criterion were used to evaluate and compare the seal ring performances;finally,the life test of the seal ring under the action of multiple factors was carried out,and the experimental results were compared with the simulation results.The experimental results verified the feasibility and reliability of the test machine for cone bit sealing test.The designed sealing test machine of cone bit can predict the service life of cone bit seal ring,and has a broad application prospect in engineering.