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我厂生产的各种型号的钢球磨煤机传动齿轮副中,主动齿轮为人字齿轮轴,模数为5～8,节圆直径在200～270毫米(调质毛坯尺寸还要大些)。图1为较典型的一种。该齿轮在运行中负荷较重,且受冲击载荷,使用单位反映断齿较为严重。因为润滑和密封条件较好,未发现点蚀、咬合、剥落。所以,我们认为提高齿部和齿根部的强度是解决问题的关键。关于表面强化方面,实践证明磨损很小,且淬火齿轮比软齿面齿轮容易折断,这可能是与淬火组织中的微裂纹和应力分布不合理有
I plant the production of various types of steel ball mill gear pair, the pinion gear for the herringbone axis, the modulus of 5 to 8, pitch diameter of 200 to 270 mm (quenched rough size even larger). Figure 1 is a more typical one. The heavy load in the operation of the gear, and affected by the impact load, the use of units to reflect broken teeth is more serious. Because lubrication and sealing conditions are good, no pitting, bite, spalling. Therefore, we think the key to solve the problem is to improve the strength of the teeth and the root. On the surface strengthening, the practice proved that wear is small, and the quenched gear easier to break than soft-tooth gear, which may be quenched with micro-cracks and stress distribution is not reasonable