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螺杆压缩机工作的可靠性及效率,在很大程度上取决于转子的加工精度,在国内外,通常均采用盘形铣刀按仿形法加工。显然,这种方法的加工精度和生产率都比较低。目前,西德、日本、英国、美国以及苏联等,已开始对小尺寸转子采用滚刀加工。由于小型转子精度要求较高、产量较大,而加工这种转子的滚刀尺寸并不很大,在实践上有可能制造出来,因此采用滚刀加工小型转子具有一定发展前途。这里仅对滚刀齿形的计算及其有关问题作一初步讨论。这些计算公式可以方便地编成语言程序,由计算机得出具体结果。一、转子型线及计算准备 1.已知条件齿数:z_1,z_2; 节圆半径:R_1,R_2(R_1/R_2=z_1/z_2=i); 齿高半径:r(圆心在节圆上); 圆弧延长角:ψ_1;
Screw compressor work reliability and efficiency, to a large extent depends on the rotor machining accuracy, at home and abroad, usually using a disc cutter according to profile processing. Obviously, this method of processing accuracy and productivity are relatively low. At present, West Germany, Japan, Britain, the United States and the Soviet Union, have begun to use small hobs hobbing. Due to the high accuracy and high yield of small rotor, the hob size of this rotor is not large enough to be manufactured in practice. Therefore, hobbing with small rotor has certain development prospects. Here only the calculation of hob tooth shape and its related issues for a preliminary discussion. These formulas can be easily compiled into a language program, the computer to draw concrete results. First, the rotor profile and calculation 1. Known conditions Number of teeth: z_1, z_2; pitch radius: R_1, R_2 (R_1 / R_2 = z_1 / z_2 = i); tooth radius: r ; Arc extension angle: ψ_1;