原材料喷口反馈钢索检测技术探讨
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摘要
为保证航空发动机用喷口反馈钢索质量,使用前需要进行喷口反馈钢索的强度检测。依照相关技术标准的要求,通过技术攻关,研制出能够将钢索锁紧拉伸的专用工装夹具,选定合理的试验参数开展钢索整绳破断拉力及钢索两端轴脱力的强度检测。结果表明:钢索拉伸过程中没有出现打滑和应力集中的现象,钢索在有效部位断裂,并且同轴度得到了保证。该方法获得的试验数据满足技术要求,能够反映出钢索实际工况下的强度指标,为设计部门提供了试验依据,满足了原材料及产品的检测需求,填补了试验室该项检测的空白。
To ensure the quality of the feedback cable in aero engine nozzle,the strength of the nozzle feedback cable should be tested before use. According to the requirements of relevant technical standards,through technical research,a special fixture for locking steel cables was developed,and the strength testing for the breaking force of steel cables and the two ends' axial force of the steel cables was carried out by selecting reasonable test parameters. The results showed that there was no slip and stress concentration during the tensile process of the cable,and the cable was broken in the effective part. At the same time,the coaxiality was guaranteed. The experimental data obtained by this method met the technical requirements,can reflect the strength index of the steel cable under the actual working conditions,provide the experimental basis for the design department,meet the testing requirements of raw materials and products,and fill the test blank in the laboratory.
To ensure the quality of the feedback cable in aero engine nozzle,the strength of the nozzle feedback cable should be tested before use. According to the requirements of relevant technical standards,through technical research,a special fixture for locking steel cables was developed,and the strength testing for the breaking force of steel cables and the two ends' axial force of the steel cables was carried out by selecting reasonable test parameters. The results showed that there was no slip and stress concentration during the tensile process of the cable,and the cable was broken in the effective part. At the same time,the coaxiality was guaranteed. The experimental data obtained by this method met the technical requirements,can reflect the strength index of the steel cable under the actual working conditions,provide the experimental basis for the design department,meet the testing requirements of raw materials and products,and fill the test blank in the laboratory.
引文
[1]中华人民共和国质量监督检验检疫总局,中国国家标准化管理委员会.GB/T228.1—2010金属材料拉伸试验第一部分室温试验方法[S].北京:中国标准出版社,2011.
[2]中国航空工业总公司.HB5143—1996金属材料室温拉伸试验方法[S].北京:北京航空材料研究院,2003.
[3]郭志强,陆爱珍.HB5177—1996金属丝材拉伸试验方法[S].北京:航空工业总公司第六二一研究所,1997.
[4]户国清,齐彪,陈德,等.拉伸速率对测试结果的影响[J].物理测试,2015,33(5):1.
[5]刘志刚,周宏林.拉伸试验应注意的几个问题[J].物理测试,2016,34(4):22.
[6]于新北,吴倩颖,杨雷岗,等.材料试验机针对拉伸试验新标准的改进[J].物理测试,2014,32(2):54.
[7]吴伟.金属材料高温拉伸试验新旧国家标准对比分析[J].物理测试,2017,35(2):53.
[8]彭胜,彭其春,范丹萍,等.耐候钢Q450NQR1拉伸试验断口分层原因分析[J].物理测试,2014,32(1):36.
[2]中国航空工业总公司.HB5143—1996金属材料室温拉伸试验方法[S].北京:北京航空材料研究院,2003.
[3]郭志强,陆爱珍.HB5177—1996金属丝材拉伸试验方法[S].北京:航空工业总公司第六二一研究所,1997.
[4]户国清,齐彪,陈德,等.拉伸速率对测试结果的影响[J].物理测试,2015,33(5):1.
[5]刘志刚,周宏林.拉伸试验应注意的几个问题[J].物理测试,2016,34(4):22.
[6]于新北,吴倩颖,杨雷岗,等.材料试验机针对拉伸试验新标准的改进[J].物理测试,2014,32(2):54.
[7]吴伟.金属材料高温拉伸试验新旧国家标准对比分析[J].物理测试,2017,35(2):53.
[8]彭胜,彭其春,范丹萍,等.耐候钢Q450NQR1拉伸试验断口分层原因分析[J].物理测试,2014,32(1):36.