设计简介
齿轮传动是应用极为广泛和特别重要的一种机械传动形式,它可以用来在空间的任意轴之间传递运动和动力,目前齿轮传动装置正逐步向小型化,高速化,低噪声高可靠性和硬齿面技术方向发展,齿轮传动具有传动平稳可靠,传动效率高(一般可以达到94%以上,精度较高的圆柱齿轮副可以达到99%),传递功率范围广(从仪表中齿轮微小功率的传动到大型动力机械几万千瓦功率的传动)速度范围广(齿轮的圆周速度可以从0.1m/s到200m/s或高,转速可以从1r/min到20000r/min或更高),结构紧凑,维护方便等优点。因此,它在各种机械设备和仪器仪表中被广泛使用。本文设计的就是一种典型的二级锥齿轮圆柱直齿轮减速器的传动装置。其中小齿轮材料为40Cr(调质),硬度约为240HBS,大齿轮材料为45钢(调质),硬度约为215HBS,齿轮精度等级为8级。轴、轴承、键均选用钢质材料。
关键词:链式输送机;锥齿轮;轴、轴承;
关键词:链式输送机;锥齿轮;轴、轴承;
ABSTRACT
Gear is a wide range of applications, and a particularly important form of mechanical transmission, which can be used for any axis in space to pass between the movement and power, is currently gearing gradually to small, high-speed, low noise, high reliability Hardened technical direction and development of stable and reliable gear with the transmission, high transmission efficiency (typically up to 94% and high precision cylindrical gear up to 99%), transmission power range (from the meter gear small power transmission to large machinery and tens of thousands of kilowatts of power transmission) speed range (speed of the circumference of gear from 0.1m / s to 200m / s or higher, the rotational speed or higher from 1r/min to 20000r/min ), compact, and easy maintenance. Therefore, it is in a variety of mechanical equipment and instrumentation is widely used. This is a typical design of a cylindrical gear reducer gear. One small gear material 40Cr (quenched), the hardness is about 240HBS, gear material is 45 steel (quenched and tempered), hardness of about 215HBS, gear
accuracy grade 8 level. Shafts, bearings, keys are made of steel material.
KEY WORDS: reducer; gear; shafts, bearings; key; coupling
目 录
第一章 绪论 ………………………………………………………………………6
1.1 分析和拟定传动方案………………………………………………………6
1.2方案的确定及优缺点分析…………………………………………………7
第二章 电动机的选择与传动比的分配 …………………………………………7
2.1 电动机的选择计算…………………………………………………………7
2.2 计算传动装置的总传动比i并分配传动比………………………………8
2.3 计算传动装置各轴的运动和动力参数……………………………………8
第三章 链传动的设计计算 ………………………………………………………9
3.1选择链轮齿数…………………………………………………………………9
3.2确定计算功率…………………………………………………………………9
3.3 确定链条型号和节距,初定中心距a0,取定链节数Lp…………………10
3.4 求作用在轴上的力…………………………………………………………10
3.5 选择润滑方式………………………………………………………………10
第四章 齿轮的设计计算 …………………………………………………………10
4.1 圆柱斜齿轮的设计 ………………………………………………………11
4.2 锥齿轮的设计 ……………………………………………………………14
第五章 轴的设计计算与校核 ……………………………………………………17
5.1高速轴的设计………………………………………………………………17
5.2中间轴的设计………………………………………………………………21
5.3低速轴的设计………………………………………………………………26
第六章 轴承的计算与校核 ………………………………………………………30
6.1 轴承1的计算与校核………………………………………………………30
6.2 轴承2的计算与校核………………………………………………………31
6.3 轴承3的计算与校核………………………………………………………31
第七章 箱体的设计………………………………………………………………32
第八章 键的选择…………………………………………………………………34
第九章 润滑与密封………………………………………………………………35
参考文献……………………………………………………………………………36
致谢信………………………………………………………………………………37
小结………………………………………………………………………38