石油矿场机械
石油礦場機械
석유광장궤계
Oil Field Equipment
2015年
11期
9-11,12
,共4页
压缩弹簧%应力松弛%残余切应力%载荷损失率
壓縮彈簧%應力鬆弛%殘餘切應力%載荷損失率
압축탄황%응력송이%잔여절응력%재하손실솔
compression spring%stress relaxation%residual shear stress%load loss rate
在热采井中，井下安全阀执行机构的压缩弹簧是处于高温压缩状态，必然出现应力松弛行为。采用 ANSYS 软件仿真模拟与理论分析相结合的方法研究压缩弹簧在特定工况下的应力松弛行为，对于判断井下安全阀的工作性能、应力松弛后压缩弹簧的力学性能具有重要意义。根据建立的压缩弹簧数值模型，求得了压缩弹簧应力松弛后的残余切应力及载荷损失率。结果表明，初始载荷越大，切应力衰减越快，相同作用时间内载荷损失率越大；经历8760 h 应力松弛后的剩余载荷大于外部载荷，压缩弹簧满足工作要求。
在熱採井中，井下安全閥執行機構的壓縮彈簧是處于高溫壓縮狀態，必然齣現應力鬆弛行為。採用 ANSYS 軟件倣真模擬與理論分析相結閤的方法研究壓縮彈簧在特定工況下的應力鬆弛行為，對于判斷井下安全閥的工作性能、應力鬆弛後壓縮彈簧的力學性能具有重要意義。根據建立的壓縮彈簧數值模型，求得瞭壓縮彈簧應力鬆弛後的殘餘切應力及載荷損失率。結果錶明，初始載荷越大，切應力衰減越快，相同作用時間內載荷損失率越大；經歷8760 h 應力鬆弛後的剩餘載荷大于外部載荷，壓縮彈簧滿足工作要求。
재열채정중，정하안전벌집행궤구적압축탄황시처우고온압축상태，필연출현응력송이행위。채용 ANSYS 연건방진모의여이론분석상결합적방법연구압축탄황재특정공황하적응력송이행위，대우판단정하안전벌적공작성능、응력송이후압축탄황적역학성능구유중요의의。근거건립적압축탄황수치모형，구득료압축탄황응력송이후적잔여절응력급재하손실솔。결과표명，초시재하월대，절응력쇠감월쾌，상동작용시간내재하손실솔월대；경력8760 h 응력송이후적잉여재하대우외부재하，압축탄황만족공작요구。
With the state of high temperature and compression in the thermal recovery wells,the stress relaxation behavior referring to the compression spring of the subsurface safety valve is in-evitably emerged.The stress relaxation behavior of compression spring under the specific condi-tions is investigated by the method of ANSYS simulation and theory.These have a significant in-fluence on evaluating the performance of the subsurface safety valve and the mechanical properties of the compression spring after stress relaxation.The results show that when the original load is bigger,the decreasing speed of the shear stress is faster,at the same time the load loss rate is also bigger.Because the remaining load is greater than the external load,the compression spring can meet work requirements after the 8 760 hours stress relaxation.
