摘  要

渐开线行星齿轮减速器是一种至少有一个齿轮绕着位置固定的几何轴线作圆周运动的齿轮传动，这种传动通常用内啮合且多采用几个行星轮同时传递载荷，以使功率分流。渐开线行星齿轮传动具有以下优点:传动比范围大、结构紧凑、体积和质量小、效率普遍较高、噪音低以及运转平稳等，因此被广泛应用于起重、冶金、工程机械、运输、航空、机床、电工机械以及国防工业等部门作为减速、变速或增速齿轮传动装置
NGW型行星齿轮传动机构的传动原理:当高速轴由电动机驱动时，带动太阳轮回转，再带动行星轮转动，由于内齿圈固定不动，便驱动行星架作输出运动，行星轮在行星架上既作自转又作公转，以此同样的结构组成二级、三级或多级传动。NGW型行星齿轮传动机构主要由太阳轮、行星轮、内齿圈及行星架所组成，以基本构件命名，又称为ZK-H型行星齿轮传动机构。
本设计的基本思想是以两级外啮合接触强度相等为原则分配传动比，而构造是以高速级传动比为设计变量的目标函数，采用黄金分割法得到合理的传动比分配。然后采用离散变量的组合型法分别进行单级传动的优化设计。
 
关键词：渐开线齿轮，离散变量，齿轮传动，优化设计

Abstract

Involute planetary gear reducer is a kind of at least one gear around the axis of the geometry of the fixed position for circular motion of gear transmission, the transmission usually use internal meshing and use more several planet round and load, in order to make power diversion. Involute planetary gear transmission has the following advantages: transmission range, compact structure, small volume and quality, and generally high efficiency, low noise and stable operation, etc, so are widely used in lifting, metallurgy, construction machinery, transportation, aviation, machine tools, electric machinery and defense industry and other sectors for slowing down, variable speed or growth gear transmission device
Planetary gear transmission mechanism NGW modeled drive principle: when the shaft from motor driver, drive the sun turn rebirth, then drive the planet wheel rotation, with the inner circle teeth fixed, then drive planet shelf as the output motion, the planet round in the planet shelf is rotation and the revolution, to the same structure of the second and third or multi-stage transmission. NGW modeled planetary gear transmission main institutions by the sun, planets wheel, inner wheel gear circle and of planet shelf, with basic component named, also called ZK-H planetary gear transmission mechanism.
The basic idea of this design is based on the two levels of meshing contact strength for principle equal distribution ratio, and structure is based on the level as the design variables transmission ratio, the objective function of the separation of gold get reasonable distribution of transmission ratio. And then the discrete variable combination method, single stage of transmission of optimization design.
 
Key Words:  Involute gear, discrete variables, gear transmission, optimization design