论文部分内容阅读
一、研究方案的选择 涡轮压气机叶轮的材料为40CrNiMoA,工作条件苛刻,额定转速47000转/分,超载疲劳试验时要求转速达到65000转/分,工作温度约为230℃,出口气压4.2公斤/厘米~2,叶轮外形复杂,19条薄而高的肋呈放射状等分,单条肋双向变截面,最薄处仅1.2毫米,直径为200毫米,投影面积约为300厘米~2,研制成功的叶轮精锻件见图1。该零件采用机械加工方法制造是很复杂的,而且由于在机械加工中锻造流线被割断,对零件的使用性能,
First, the choice of research programs Turbine compressor wheel material 40CrNiMoA, harsh working conditions, rated speed of 47000 rev / min, overload test required speed 65000 rev / min, the working temperature is about 230 ℃, the export pressure of 4.2 kg / Cm ~ 2, the impeller is complex in shape, 19 thin and high ribs are radially divided equally, the single rib bi-directionally variable cross section, the thinnest at only 1.2 mm, the diameter of 200 mm, the projected area of about 300 cm ~ 2, developed successfully Impeller forgings shown in Figure 1. The parts machined by the machining method is very complex, and because of forging in the machining of the streamline is cut off, the use of parts performance,