磁流变液延期解除保险机构的延期时间调控

针对小口径弹药引信磁流变液延期解除保险机构通用性的问题，分析了机构结构、磁流变液特性和环境参数对延期时间的综合影响，通过旋转等效实验确定了该机构延期时间的调控能力.在机构结构分析中，分析了孔型、孔径和孔长对延期时间调控的影响，选择孔径作为时间调控参数.在磁流变液特性分析中，基于Herschel-Bulkey模型，推导了磁流变液黏度表达式，并通过黏-温特性实验，确定了磁流变液泄流时黏度的影响因素.通过旋转等效实验深入研究了在60 000~90 000 r/min转速条件下孔径和磁流变液配比对延期时间的调控能力.研究结果表明:在磁流变液配比为7:1，8:1，9:1和0.26~0.30 mm孔径条件下，能够更有效地调控延期时间，并且这种机构在60 000~70 000 r/min转速条件下有很好的通用性. 

Delay Arming Time Control of Safe and Arming Device Using Magnetorheological Fluid

To solve the universal problem of fuze arming device using magnetorheological fluid (MRF) for small caliber artillery,the integrated influence of device structure,characteristics of MRF and environment parameter on delay arming time was analyzed,and the control ability was confirmed through equivalent rotation experiment.In the analysis of the structure of the hole,the hole pattern,aperture and hole length were analyzed,and the aperture was designated as control parameter.In the analysis of characteristic of MRF,through the viscosity equation deduced based on the Herschel-Bulkey model and viscosity-temperature experiment,the influence factors of the viscosity were determined when MRF discharged.Finally,through changing the aperture and configuration of MRF,the ability to control delay arming time was well studied under 60 000~90 000 r/min rotation speeds in equivalent rotation experiment.The results indicate that the delay arming time can be controlled effectively when the configuration of MRF is 7:1、8:1、9:1 and aperture is 0.26~0.30 mm,and the device has good universality under these conditions under 60 000~70 000 r/min rotation speed.