二级圆柱齿轮减速器设计 大学毕设论文.doc

??减速器是一种由封闭在刚性壳体内的齿轮传动所组成的独立部件, 常用在动力机与工作机之间作为减速的传动装置,在少数场合下也用作增速的传动装置, 这时就称为增速器, 减速器由于结构紧凑, 效率较高, 传递运动准确可靠,使用维护简单,并可成批生产,故在现代机械中应用很广。汽轮机的减速器都采用斜齿轮,斜齿一般具有渐开形,新的减速器齿轮采用螺线形斜齿轮。汽轮机减速器齿轮是将斜齿轮成组的组装在一起成为人字形齿轮组,用来平衡斜齿轮工作时的轴向推力,从而保证齿轮啮合良好。在有些小型汽轮机的减速器上, 靠发电机侧的大齿轮轴承, 除有支承作用外,在轴承两侧还浇铸有乌金,并开有倾斜油槽,与装在大齿轮轴上的两个推力盘组成推力轴承,来承受轴向推力。大齿轮工作时的轴向推力,可能来自发电机,也可能是斜齿轮工作时残余的轴向不平衡推力。????齿轮;传动比;减速器。 Abstract Reducer isa kind of enclosed bya rigid shell gear in the transmission, which posed of ponents, commonly used as gear between the power machine and work, ina few cases is also used asa speed transmission device, then said speeder, reducer due pact structure, high efficiency transmission movement, accurate and reliable, simple maintenance and batch production, so in the modern machinery is widely used. Turbine reducer adopts helical gears, bevel generally has gradually open form, the new reduction gear using spiral bevel gear. The reducer gear of the turbine is assembled together with the helical gear into a human form gear set, which is used to balance the axial thrust of the helical gear in order to ensure the gear meshing well. In some small turbine reducer on, rely on the generator side gear bearing, in addition toa supporting role, on the two sides of the bearing also cast Ugyen, and is provided with an inclined oil groove, and installed in the gear shaft of the two thrust posed of thrust bearing, to bear the axial thrust. The axial thrust of the big gear, which e from the generator, may also be the axial unbalance thrust of the helical gear. Key words: gear; transmission ratio; gear reducer. ??第一章工作机器特征的分析.......................................................................... 1 第二章传动方案的设计.................................................................................. 2 第三章选择电动机.......................................................................................... 3 求电机至工作机之间的传动装置的总效率............................................ 3 计算电机所需功率...................................