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由于锥形螺纹接头结构简单,且不需要依靠填料(只需涂润滑脂)即可在高压下保持密封,因而被广泛采用在液压系统中。60°锥形螺纹(HB247-67)的联接如图1所示,螺纹型面角(60°)的等分角线垂直于管子轴线,斜角为1°47′24″,螺距为S,螺纹工作高度为h_1+h_2=0.8S(普通螺纹的工作高度为h=0.54S)。在用手拧紧螺纹之前,内外螺纹的齿峰、齿谷和齿侧之间均有缝隙存在,如图2(a)所示。而当用手力将管子拧紧在接管套内,使接管套内螺纹的基面与管子外螺纹的基面相重合,此时内外螺纹齿形两侧接触。但由于螺纹牙顶高h_1和牙根高h_2均有负偏差δh_1和δh_2,故此时齿峰和齿谷间仍有缝隙存在,如图2(b)所示。由于有斜角,从基面开始再将管子用扳手拧进一扣,
The tapered nipples are widely used in hydraulic systems due to their simple structure and their ability to hold seals under high pressure without relying on packing (greased only). The 60 ° taper thread (HB247-67) is attached as shown in Figure 1. The bisector angle of the thread profile (60 °) is perpendicular to the tube axis at an angle of 1 ° 47’24 "with a pitch of S, Thread working height h_1 + h_2 = 0.8S (ordinary thread working height h = 0.54S). Before tightening the thread by hand, the internal and external thread peaks, valleys and flanks of the gap between the existence, as shown 2 (a) .When the pipe by hand to tighten the pipe in the sleeve, so that the outer surface of the pipe thread with the base surface of the pipe thread coincide, then both sides of the internal and external thread toothed but the thread The crest height h_1 and the root height h_2 have negative deviation δh_1 and δh_2, so there is still a gap between the tooth peak and the tooth valley, as shown in Figure 2 (b) .Because of bevel angle, Use a wrench to screw into a buckle,