CAJ | 학술논문

设计一种由2个螺旋槽组合构成新型螺旋型槽干气密封结构，该组合螺旋型槽由沿外圈开设的大螺旋槽以及沿大螺旋槽根部开设的小螺旋槽组合而成。运用流体仿真软件Fluent对组合螺旋型槽干气密封的密封性能进行数值模拟，并与螺旋型槽干气密封进行比较。通过正交试验法对组合螺旋型槽干气密封的结构参数进行优化分析，获得了以开启力、泄漏量、扭矩为目标函数的组合螺旋型最优端面结构。结果表明，组合螺旋型槽干气密封在同等结构参数下的密封性能优于螺旋型槽干气密封，且压力、槽台宽比和槽深越大，组合螺旋型槽在减少泄漏量方面的优势更加明显；对于组合螺旋型槽干气密封，泄漏量、开启力、扭矩最优对应的端面结构参数组合不同，在干气密封设计时，应根据设计目标需要，选择合适的端面结构参数组合。
설계일충유2개라선조조합구성신형라선형조간기밀봉결구，해조합라선형조유연외권개설적대라선조이급연대라선조근부개설적소라선조조합이성。운용류체방진연건Fluent대조합라선형조간기밀봉적밀봉성능진행수치모의，병여라선형조간기밀봉진행비교。통과정교시험법대조합라선형조간기밀봉적결구삼수진행우화분석，획득료이개계력、설루량、뉴구위목표함수적조합라선형최우단면결구。결과표명，조합라선형조간기밀봉재동등결구삼수하적밀봉성능우우라선형조간기밀봉，차압력、조태관비화조심월대，조합라선형조재감소설루량방면적우세경가명현；대우조합라선형조간기밀봉，설루량、개계력、뉴구최우대응적단면결구삼수조합불동，재간기밀봉설계시，응근거설계목표수요，선택합괄적단면결구삼수조합。
A new structure of spiral groove dry gas seal was designed with two combined spiral grooves. The combined spiral grooves consist of large spiral grooves processed along the outside edge of the seal and small spiral grooves along the roots of the large ones.The performance of this seal was simulated by Fluent and the results were compared with a common spiral groove dry gas seal.The structure parameters of seal end face were optimized with the objective functions of opening force,leakage and torque by orthogonal method. The results show that the combined spiral groove dry gas seal has better performance than the common one with same structure parameters,which has more obvious advantages of reducing leakage at higher pressure,deeper groove and higher ratio of groove width and ridge width of spiral groove.The optimal structure pa?rameters corresponding to opening force,leakage and torque are different for the combined spiral groove dry gas seal,hence it is necessary to choose an appropriate combination of seal end face structure parameters to meet the demand in the design of dry gas seals.