在不影响喷管性能的前提下,将环形HYLTE喷管叶片分解为4个1/4圆环,经过进一步简化设计后,得到只有3个截面中心共面的内部管道的1/4环形叶片。提出了两种环形HYLTE喷管叶片的加工方法:真空钎焊的方法和嵌铸的方法,并对两种方法进行了比较。对于真空钎焊的方法,进行了验证加工,测试结果表明喷管叶片焊接处气密性良好,力学性能优良,可在较高温度下正常工作。嵌铸的方法在一体化加工方面优势明显,可作为环形喷管加工的备选方法。

An initial baseline approach of fabricating the full ring HYLTE nozzle blade from 4-1/4 ring segments is selected.A novel 1/4 ring HYLTE nozzle structure including three gas supply pipelines is obtained by further simplifing existing ring nozzle structures.The section centers of the pipelines are all on the symmetric plane of the nozzle blade.These changements will not influence the performance of the nozzle.In addition,two fabricating methods of ring HYLTE nozzle blades are presented,one is vacuum brazing method,the other is embed-casting method.Samples are made using the first method.The corresponding testing results demonstrate that the welds of the ring nozzle blade have the characteristics of resistance to leaking,well mechanical properties and working properly in high temperature.The second method is of advantage to integrated fabrication.It should be given more attention as a potential method.