三维装配图
具有4-20MA远传信号的液位计设计
摘要：在现代制造业中，油位计在各种非标准自动化设备中的应用极为广泛，基本上安装在封闭的油箱上用来测量油液位的液位高度值，其通过内部结构将液位高度的实时变化值传动至外置指针表盘，以供使用者观测。传统的油液位测量仪在设计中难免存在不足之处，比如结构较为复杂且实现的功能很少，尤其不能进行实时信号的远距离传输，精度方面更是达不到应有的要求。本所设计的油液位测量仪，充分考虑了我国现阶段机械行业普遍制造工艺现状及代加工工厂的实际设备情况，为此设计了一套具有远传信号的YZF型油液位测量仪，在满足传统油液位测量仪的基础上，增添了新的功能，尤其在结构方面，进行了大幅度优化，更好地安排内置零件的空间分布位置，并且尽最大可能满足制造精度要求，以实现更高精度的远传信号。
采用依靠计算机辅助设计软件UG及Auto-CAD进行三维设计和二维工程图绘制，在UG软件按照自顶向下的设计理念进行结构设计的方法，在设计的整个过程中，通过在满足加工工艺要求的同时，也在零件的特殊位置施加曲面设计以更好地满足人的视觉需要，当然考虑了研发制造成本，在零件材料的选取上，尽可能在材料满足耐磨耐腐蚀的基础上选择较便宜的材质。同时对于齿轮的传动精度方面，在工程图中有所注明，即加工要求较高的手段，得出了所设计的油液位测量计能满足弥补市面上现存产品的不足之处，取长补短以更好的适应设备得的实际需求的结果和重要的结论。
关键词：液位计；UG;Auto-CAD
Design of liquid level meterwith 4-20mA remote signal
Abstract: In modern manufacturing, the oil level meter iswidely used in all kinds of non-standard automation equipment. It is basically installed in closed oil tank to measure the level of liquid level of oil level. It drives the real time changevalue of the level height to the external pointer dial through the internal structure for the user to observe. The traditional oil level measuring instrument is difficult to avoid in the design, such as the complex structure and few functions, especially the long distance transmission of real time signal. The oil level measuring instrument designed in this paper fully considers the current situation of the general manufacturing process in our machinery industry and the actual equipment of the processing plant in our country. A set of YZF type oil level measuring instrumentwith long transmission signal is designed,which has added new functions, especially on the basis of the traditional oil level measuring instrument. In the aspect of structure, a large scale optimization is carried out to better arrange the spatial distribution of the built-in parts, and to meet the requirements of the manufacturing precision as much as possible to achieve a higher precision remote transmission signal.
The paper adopts the computer aided design software UG and Auto-CAD for three-dimensional design and drawing of two-dimensional engineering drawings. In the UG software, the design method of the structure is carried out according to the top-down design idea. In thewhole process of the design, the surface design is applied to the special position of the parts by meeting the requirements of the processing technology. for the transmission precision of gear, it is indicated in the engineering drawing, that is, the means of higher processing requirements, and the designed oil level measuring meter can meet the shortcomings of the existing products on the market and make up for better the results and important conclusions of the actual needs of the equipment.
Keywords：Liquid level meter;UG;Auto-CAD
目录
摘要I
AbstractⅡ
1绪论1
1.1课题研究的目的及意义1
1.2国内外研究现状3
1.3本课题研究内容3
2油位计的分析5
2.1油位计的构成5
2.2油位计的工作原理6
2.3影响油位计精度的因素7
2.4油位计的应用8
3油位计的设计11
3.1油位计的工艺设计12
3.2表盘与表体13
3.3浮球的设计14
3.4传动部分的设计14
3.5信号传输电路与报警电路的设计16
4油位计参数的计算19
4.1油位计外轮廓参数的计算19
4.1.1表盘的直径和量程19
4.1.2表体设计19
4.2设计摆杆20
4.2.1摆杆与浮球、指针之间的运动形式20
4.2.2摆杆的摆动角度及长度21
4.3齿轮的计算与选择21
4.3.1齿轮种类的选择22
4.3.2齿轮参数的确定22
4.3.3齿轮设计校核24
5硬件电路设计27
5.1具有远传信号的电路设计27
5.2报警电路设计27
6总结29
参考文献30
致谢31
附录a 33
外文文献及翻译33
油位计装配图
01支架
02齿轮
3密封圈
4密封圈
5端盖
06玻璃板
07支柱
09表盘
11支撑板
12垫圈
14接线座
15轴套
16齿轮
18O型密封胶圈
20支架
21锥齿
22指针
023传动轴
24支架
26橡胶套
27支撑板
28支撑板
29支柱
30齿轮
三维爆炸图
设计目录
设计字数统计
摘要部分
