大口径六片式卡箍快卸链条的有限元分析及应用

Numerical Simulation and Experimental Evaluation of Large-Sized Quick-Release Clamp

为实现快速远距离操作,大口径六片式卡箍快卸链条结构被用于CSNS/RCS横向束流准直系统。考虑接触非线性和材料非线性,本文使用ANSYS,首次从理论上分析了该快卸链条在单片链条不同角度时对密封性能的影响,同时以做实验用的铝垫圈为研究对象得出了该结构实现密封所需拧紧力矩的范围。通过CSNS/RCS主准直器中六片式卡箍快卸链条KF300的使用,验证了该结构密封的可行性及理论分析的可靠性,为次准直器中真空快卸链条的结构设计和密封所需拧紧力矩的大小提供了理论基础。

The tightening of the large-sized quick-release clamp with six pieces resembling chain links（ model KF300）,a lab-built tool to remotely control the mechanical sealing of the ＂rapid cycling synchrotron of China spallation neutron source＂（ CSNS / RCS） transverse collimators,was physically modeled,numerically simulated with software ANSYS,and experimentally evaluated. The impact of the tightening conditions,including but not limited to the angle between one clamping-piece and lead-screw,tightening torque,mechanical properties of Al-gaskets,flanges,lead-screws,etc.,on sealing performance of the clamp were investigated. In the simulation,the optimized angle between one clamping piece and lead-screw and tightening-torque range were calculated to be 40° and 2. 794 ~ 49. 2 N·m,respectively. Tightened with the quick-release clamp,the leakage rate of the primary collimator was found to be well below the technical requirements.