二维超音速扩散对称流动实验用锥形盘零件工艺仿真与检测技术研究

发布时间：2018-05-21 12:48

本文选题：高压气体 + 锥形盘　；参考：《武汉科技大学》2011年硕士论文

【摘要】：理想气体二维超音速扩散对称流动是一种新型流动,锥盘形零件是可能实现这种流动的关键部件之一。锥形盘的制造精度对这种扩散对称流动的具体参数有很大影响,本文对零件重要几何量尺寸进行测量,探讨锥盘形零件的检测方法和并对锥形盘零件进行加工工艺仿真。在二维超音速扩散对称流动实验中对止推板零件的锥角和锥面精度要求很高。检测锥角最简单的方法是用万能角度尺测量,但角度尺精度不高,本文介绍了零件的外径、内径、圆度、端面圆跳动等测量方法和测量步骤,得出各几何量达到的精度。还主要介绍了另外几种锥角的高精度测量方法的原理和操作步骤,比如正弦规的测量原理和测量方法。在文章的最后,分析了锥形零件在两种不同设计方案中,加工时主要的受力情况,同时用Ansys软件定量分析零件在卡爪的夹紧力和车刀的轴向切削力作用下,锥孔附近的应力分布状态和应变大小,通过应变情况进行对比得出加工方案的优劣。分析应变大小,可以对提高加工精度有一定的指导作用。在忽略粘性的情况下,高压气体在变间隙圆盘止推气体轴承中的流动接近于二维无旋超音速扩散对称流动。研究此锥形盘零件的检查方法和工艺仿真方法,对研究高压气体在变间隙圆盘中的流动特性具有重要的意义。
[Abstract]:The two-dimensional supersonic diffusion symmetric flow of ideal gas is a new type of flow, and the conical disk part is one of the key components to realize this flow. The manufacturing accuracy of conical disc has great influence on the specific parameters of the diffusion symmetric flow. In this paper, the important geometric dimensions of the part are measured, the inspection method of the conical disk part is discussed, and the machining process simulation of the conical disk part is carried out. The accuracy of cone angle and cone surface of thrust plate is very high in two dimensional supersonic diffusion symmetric flow experiment. The simplest method to detect cone angle is to measure the angle with universal angle ruler, but the precision of angle ruler is not high. This paper introduces the measuring methods and measuring steps of the outer diameter, inner diameter, roundness and runout of the end face, and obtains the accuracy of each geometric quantity. The principle and operation procedure of several other high precision measuring methods of cone angle, such as the measuring principle and measuring method of sinusoidal gage are also introduced. At the end of the paper, the main forces on the tapered parts in two different design schemes are analyzed. At the same time, the Ansys software is used to quantitatively analyze the clamping force of the parts under the clamping force of the claw and the axial cutting force of the turning tool. The stress distribution state and strain size near the conical hole are compared to obtain the advantages and disadvantages of the processing scheme. The analysis of strain size can be used to improve machining accuracy. In the case of ignoring viscosity, the flow of high pressure gas in variable clearance disc thrust gas bearing is close to that of two-dimensional non-rotating supersonic diffusion symmetric flow. It is of great significance to study the flow characteristics of high pressure gas in the disc with variable clearance by studying the inspection method and process simulation method of the conical disc.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.35

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