无摩擦球阀设计-机械毕业设计.docx

无摩擦球阀设计-机械毕业设计.docx曲南科啟丈曇
毕业设计（论文）
题目名称：无摩擦球阀设计
西南科技大学教务处制
无摩擦球阀设计
摘要：该设计是为了改善传统球阀的缺点而做的，传统球阀的缺点是摩擦大、使用寿 命短、密封性能不好。此设计可以根据流体冲蚀磨损、腐蚀程度和工作压力来调整密 封比压。轨道式无摩擦球阀是一种新型的球阀，它利用阀杆头部的斜面凸轮与导轨套 螺旋槽的配合来实现球阀的无摩擦开启、关闭和金属密封的新型阀门；所以设计中的 关键问题是要避免产生摩擦，密封要紧，最终达到高效率、高质量、耐用性等要求。 本论文研究对轨道式无摩擦球阀的运动和动力分析方法，完成了球阀启闭运动轨迹、 球体运动空间以及主要零部件的受力分析设计。该球阀具有启闭无磨损，关闭时压力 可调节和启闭省力的优点；克服了普通球阀因密封比压大而使密封面容易磨损的缺 点，延长了球阀的使用寿命。
关键词：无摩擦；球阀；轨道式；凸轮
Design of Non-Friction Ball Valve
Abstract: The design is to improve the shortcomings of traditional ball valve , and the shortcomings of traditional ball valve is friction, short life, sealing performance bad. According to this design's fluid erosion, corrosion and pressure then the pressure was adjust sealed .Orbit Non・Friction Ball Valve is a new type of valve and realizes non-friction switching and metal pressurization of the valve by cam paper researches the design of Orbit Non・Fraction Ball Valve's move and the analysis of dynamically. The paper puts forward the kinetic analysis method of Orbit Non・FTaction Ball Valve, analysising the track and motion space of the conglobulation for switching etc, and bring forward rule of its configuration design, designing its assembling body and main parts. This valve has a series of advantage, such as non-friction, the adjusting of pressure and laborsaving when it switches .Its pressurization is different from the usual whose pressurization is easy to destroy, which overcome the fault of the usual valves. So it has a longer life-span.
KeyWords: Orbit, Non-Friction, Ball Valve, Cam
目录
第1章引言 5
1课题来源 5
5
6
6
第2章主要结构参数 7
8
1. 1技术参数 8
1. 2技术要求 8
8
2主要结构尺寸 8
2. 1球体直径 8
2. 2密封面宽度及压紧比压 9
2. 3密封比压q 10
2. 4球阀结构长度及连接法兰尺寸 10
第3章 运动轨迹设计 10
1球阀启闭运动轨迹 10
1. 1滚动启闭 10
1. 2球阀摆动 11
1. 3凸轮的轮廓 11
2球阀下支承外形 14
2. 1滚动柱面与倒角半径 14
15
3. 3滚动空间 16
第4章结构设计和计算 16
1阀杆机构受力状况 16
1. 1球阀受力状况 17
1. 2阀杆支承反力与支承结构型式选择 18
1. 3摩擦阻力扭矩 20
21
2操作扭矩和