人人文库网 > 图纸下载 > 毕业设计 > 双螺杆压缩机的设计【2张CAD图纸+毕业论文】

附录.doc

双螺杆压缩机的设计【2张CAD图纸+毕业论文】

资源目录

双螺杆压缩机的设计【全套CAD图纸+毕业论文】.rar

双螺杆压缩机（剖视）.DWG

阴阳转子啮合.DWG

压缩包内文档预览：

编号：721979 类型：共享资源大小：1.25MB 格式：RAR 上传时间：2016-08-04 上传人：好资料QQ****51605 IP属地：江苏

45
积分

版权申诉 word格式文档无特别注明外均可编辑修改；预览文档经过压缩，下载后原文更清晰！ 立即下载

关键词：: 螺杆压缩机设计全套 cad 图纸毕业论文

资源描述：

【温馨提示】购买原稿文件请充值后自助下载。

以下预览截图到的都有源文件,图纸是CAD，文档是WORD，下载后即可获得。

预览截图请勿抄袭，原稿文件完整清晰，无水印，可编辑。

有疑问可以咨询QQ：414951605或1304139763

双螺杆压缩机的设计

【摘要】双螺杆压缩机是一种比较新颖的压缩机，因其可靠性高、操作维修方便、动力平衡性好、适应性强等优点，而广泛地应用于矿山、化工、动力、冶金、建筑、机械、制冷等工业部门。双螺杆压缩机已经超过所有工业压缩机的50 ％，其市场份额超过80 ％，今后其市场份额还将继续扩大。可见，研究双螺杆压缩机具有十分重要的意义。本课题主要是设计通用的喷油双螺杆空气压缩机，采用单边不对称摆线-销齿圆弧型型线，阴、阳转子齿数比为6：4。设计新型转子型线，目的是使接触线长度、泄漏三角形面积和封闭余隙容积3者达到最优化设计，以进一步提高双螺杆压缩机的机械性能。重点研究的是双螺杆压缩机的转子型线设计、几何特性、受力分析、热力学计算。

【关键词】双螺杆压缩机转子型线啮合线齿间容积

The design of twin screw compressor

[Abstract] The twin-screw compressor is a kind of newly emerging compressor. Because of its high reliability, easy repair, good balance and good adaptability etc, and widely applied to such industrial departments as mine, chemical industry, power, metallurgy, architecture, machinery, refrigeration, etc. By designing the project, the volumetric efficiency is 70%, the compressed temperature is more 80℃。It is very important to design and research a twin-screw compressor in industrial. The project is to design a universal twin-screw air compressor, and to adopt single side asymmetric swept line unilaterally and dowel tooth circular rotor profile. There are six lobes on the female rotor and four lobes on the male rotor. The aim of designing a new rotor profile is to optimize the contact line length, blowhole area and clearance volume. That can improve the mechanical performance of a twin-screw compressor further. The project is mainly to research a twin-screw compressor rotor profile, geometry characteristic, mechanics analysis, thermodynamics calculation

[Keywords] A twin-screw compressor, rotor profile, mesh curve, tooth space volume.

毕业设计(论文)任务书…………………………………………………………………..Ⅰ

开题报告………………………………………………………………………………….Ⅱ

指导教师审查意见……………………………………………………………………….Ⅲ

评阅教师评语…………………………………………………………………………….Ⅳ

答辩会议记录…………………………………………………………………………….Ⅴ

中文摘要………………………………………………………………………………….Ⅵ

外文摘要………………………………………………………………………………….Ⅶ

前言…………………………………………………………………………………. ….1

1选题背景……………………………………………………………………………. ….3

1.1研究双螺杆压缩机的目的和意义……………………………………………3

1.2双螺杆压缩机的特点和应用前景……………………………………………3

1.3国内外双螺杆压缩机研究的进展……………………………………………5

1.4双螺杆压缩机基本结构和工作原理…………………………………………6

2双螺杆压缩机的转子型线设计……………………………………………………. ….9

2.1转子型线设计原则……………………………………………………………9

2.2型线方程和啮合线方程………………………………………………………10

2.3单边不对称摆线-销齿圆弧型线………………………………………… … 10

3双螺杆压缩机螺杆尺寸的确定……………………………………………………. …23

4几何特性……………………………………………………………………………. …23

4.1齿间面积和面积利用系数……………………………………………………23

4.2齿间容积及其变化过程………………………………………………………24

4.3扭角系数及内容积比…………………………………………………………27

5双螺杆压缩机的热力学计算……………………………………………………. …28

5.1内压力比………………………………………………………………………28

5.2容积流量及容积效率…………………………………………………………28

5.3轴功率…………………………………………………………………………29

5.4电动机功率……………………………………………………………………31

5.5电功率…………………………………………………………………………31

6双螺杆压缩机的结构设计……………………………………………………………31

7双螺杆压缩机的力学计算……………………………………………………………31

7.1径向力的计算…………………………………………………………………32

7.2轴承支反力的计算……………………………………………………………34

7.3轴向力的计算…………………………………………………………………34

8双螺杆压缩机的吸、排气孔口设计…………………………………………………35

8.1吸气孔口………………………………………………………………………36

8.2排气孔口………………………………………………………………………37

9主要零部件设计和选材……………………………………………………………. .38

10双螺杆压缩机压力脉动计算………………………………………………………39

结束语………………………………………………………………………………. …43

参考文献…………………………………………………………………………. …. .44

附录………………………………………………………………………………. …. .Ⅸ

前言

双螺杆压缩机属于回转式压缩机。回转式压缩机是一种工作容积作旋转运动的容积式气体压缩机械。气体的压缩是通过容积的变化来实现，而容积的变化又是借压缩机的一个或几个转子在气缸里作旋转运动来达到。回转式压缩机的工作容积不同于往复式压缩机，它除了周期性地扩大和缩小外，其空间位置也在变更。

回转式压缩机靠容积的变化来实现气体的压缩，这一点与往复式压缩机相同，它们都属于容积式压缩机；回转式压缩机的主要机件（转子）在气缸内作旋转运动，这一点又与速度式压缩机相同。所以，回转式压缩机同时兼有上述两类机器的特点。

回转式压缩机没有往复运动机构，一般没有气阀，零部件（特别是易损件）少，结构简单、紧凑，因而制造方便，成本低廉；同时，操作简便，维修周期长，易于实现自动化。

回转式压缩机的排气量与排气压力几乎无关，与往复式压缩机一样，具有强制输气的特征。

回转式压缩机运动机件的动力平衡性良好，故压缩机的转数高、基础小。这一优点，在移动式机器中尤为明显。

回转式压缩机转数高，它可以和高速原动机（如电动机、内燃机、蒸汽轮机等）直接相联。高转数带来了机组尺寸小、重量轻的优点。同时，在转子每转一周之内，通常有多次排气过程，所以它输气均匀、压力脉动小，不需设置大容量的储气罐。

回转式压缩机的适应性强，在较大的工况范围内保持高效率。排气量小时，不像速度式压缩机那样会产生喘振现象。

在某些类型的回转式压缩机（如罗茨鼓风机、螺杆式压缩机）中，运动机件相互之间，以及运动机件与固定机件之间，并不直接接触，在工作容积的周壁上无需润滑，可以保证气体的洁净，做到绝对无油的压送气体（这类机器成为无油回转压缩机）。同时，由于相对运动的机件之间存在间隙以及没有气阀，故它能压送污浊和带液滴、含粉尘的气体。

但是，回转式压缩机也有它的缺点，这些缺点是：

由于转数较高，加之工作容积与吸排气孔口周期性地相通、切断，产生较为强烈的空气动力噪声，其中螺杆式压缩机、罗茨鼓风机尤为突出，若不采取消音措施，即不能被用户所利用。

许多回转式压缩机，如螺杆式、罗茨式、转子式等，运动机件表面多呈曲面形状，以其啮合运动使工作容积改变，这些曲面的加工及其校验均较复杂，有的还需使用专用设备。

回转式压缩机工作容积的周壁，大多不是圆柱形，使运动机件之间或运动机件与固定机件之间的密封问题较难满意解决，通常仅以其间保持一定的运动间隙达到密封，气体通过间隙势必产生泄漏，这就限制了回转式压缩机难以达到较高的终了压力。

回转式压缩机的形式和结构类型较多，分类也各有不同。

按转子的数量区分：单转子和双转子回转式压缩机，个别情况下还有多转子回转式压缩机；

按气体压缩的方式区分：有内压缩和无内压缩回转式压缩机；

按工作容积是否有油（液）区分：有无油（液）和喷油（液）回转式压缩机。

通常都按结构元件的特征区分和命名，目前广为使用的有罗茨鼓风机、滑片式压缩机和螺杆式压缩机。此外，单螺杆压缩机、液环式压缩机、偏心转子式压缩机以及旋转活塞式压缩机等在不同领域内也得到应用。

上述各种回转式压缩机，除罗茨鼓风机属无内压缩的机器外，其余均是有内压缩的机器。

双螺杆压缩机是一种很年轻的压缩机型，在最近二十五年才发展成熟，形成系列化。约在一百多年前，人们已经知道双螺杆压缩机的工作原理，但类似今天设计的双螺杆压缩机的诞生日，则应该是在1934年，SRM工厂的总工程师A•利斯霍尔姆（A•Lysholm）的专利出现的时候。后来，又发明了圆弧形齿，非对称齿形SRM和今天的第四代节能型。

回转式压缩机大多作为中、小排气量，中、低压压缩机或鼓风机之用。目前，回转式压缩机在冶金、化工、石油、交通运输、机械制造以及建筑工程等工业部门得到广泛的应用；随着人民生活水平的逐步提高，在耐用消费品中也将得到广泛的应用。

1 选题背景

1.1 研究双螺杆压缩机的目的和意义

本设计题目来源是自选科研。本课题主要是设计通用的喷油双螺杆空气压缩机。在深刻理解前人研究的理论基础上，在给定设计参数和设计要求的条件下，研究双螺杆压缩机的转子型线、几何特性、工作过程、受力分析及转子的加工，以进一步提高双螺杆压缩机的机械性能。设计新型转子型线，使接触线长度、泄漏三角形面积和封闭余隙容积3者达到最优化。利用自备砂轮修正器的转子专用数控磨床，快速加工出新型线的转子，使转子的精度和表面粗糙度预计超过现有的值。设计吸气孔口的形状和合理位置，来提高压缩机效率。同时，研究型线和孔口配置等因素对噪声的影响指标，从而更有效地降低噪声。通过设计双螺杆压缩机，可以了解双螺杆压缩机的发展历程、研究现状和发展方向；深入理解双螺杆压缩机的基本结构、特点、主要零部件设计选型、主机结构设计和机组系统设计；重点研究的是双螺杆压缩机的转子型线、几何特性、工作过程、受力分析、转子加工和主要设计参数的确定。通过设计，能了解设计的一般要求和规则，能将理论知识与生产实际联系起来。

双螺杆压缩机是一种比较新颖的压缩机，因其可靠性高、操作维修方便、动力平衡性好、适应性强等优点，而广泛地应用于矿山、化工、动力、冶金、建筑、机械、制冷等工业部门。统计数据表明，螺杆压缩机的销售量已占所有容积式压缩机销售总量的80%以上，在所有正在运行的容积式压缩机中，有50%是螺杆压缩机，今后螺杆压缩机的市场份额仍将不断扩大。可以看出，螺杆压缩机的设计研究在工业生产中具有十分重要的意义。通过本设计，可以充分了解双螺杆压缩机的有关知识，以及如何进一步改善其性能和扩大其应用范围，使双螺杆压缩机能得到更好的发展，为生产和生活服务。可以将所学理论知识与生产实际联系起来，并积累了宝贵的经验，为以后的工作打下了一个坚实的基础。

全部文件.gif

双螺杆压缩机（剖视）.gif

阴阳转子啮合.gif

字数统计.gif

内容简介：: Screw compressor rotor machining tool wear the geometric calculation method Abstract: screw compressor rotor milling and processing a grinding two methods, usually conducted in two phases processing; first stage is rough, when the workpiece to be processed about its size to the second stage of Finished, when the rotor be processed into its final size when completed. Materials or cutting cushion in the finishing was removed, it is by milling, grinding and cutting tools determined by the design. Taking into account the screw compressor rotor is a spiral shape, in the process of cutting, cutting tool on every point of contact with the rotor of the horizontal length is not the same, therefore, finished at the rate of wear and tear tool of its type along the line is Inconsistent. Envelop the meshing theory be used here in terms of the process of cutting tool on every point and the relative motion between the rotor. To a certain scale, in this relative movement of assumptions, calculated on every point of the tool wear rate. By calculating the results and experimental tool that the rate of wear and tear, we can see that both the conclusions are the same. On this basis, can know how to create a rough time so that semi-processed materials while the thinning tool and thereby facilitate the finishing tool at the same rate of wear and tear. A similar technology is being applied to many of the machines during processing, and forming a variety of knives were also used for these technical. Keyword: screw compressors; spiral rotor; manufacturing tool1. Description: Screw compressor is a displacement of the rotary volume machines, it mainly by the meshing of a spiral rotor component, in the case, do rotor rotary movement, with its volume of the rotor spinning change. Todays main rotor was a screw-type, used for milling or grinding. In either form of processing by the rotor, rotor can be used to define the coordinates of their geometric characteristics, as shown in Figure 1. To run a good screw compressor rotor must mesh properly, and in the contact line in the rotor to retain a certain seal. This requires suitable for processing such knives, and must be a reasonable process of engagement worked out. Gear envelope of processing methods, if in a particular relative movement of a surface on another envelope, on this surface is meshing the two. Equation (1) the definition of a given surface, the second surface by equation (2) and the equation (3) is given. Rotor in x, y coordinates the work surface for the change function x (t) and y (t). Through the x (t) and y (t) can be defined the type of rotor, Figure 2 is a typical example. Equation (4) is a familiar mating surface. Rotor coordinate their knives and coordinates the derivation can be equation (5). Equation (5) in C on behalf of the rotor shaft centerline the distance between the rotor and tool is the angle between the shaft. h t mean, respectively, and the rotor and tool the surface. These surface of the envelope equation by equation (6) in the rotation angle to function in the form of that out.Because the surface is generated by the t to define the parameters, the envelope can be used to calculate the other parameters, it is the back corner of the rotor, is generated mesh surface as a factor. Envelope equation in the cross-section of the generation that is part of the plane, but two general points on the relative speed rotary tool is the point of view. Rotor of the lead by each rotor rotary angle to determine;r (t, )=xcos-ysin,xsin+ycos,p(1)NamingC Rotor Tool center distance Rotor rotary angleP Rotor each arc-lead Rotor-point line tan=R Tool-line coordinate Pressure angletan=r Vector coordinates Rot Shaft angles Measuring Tool Wea Tool perspectivet Rotor parameters x x Coordinate h Rotor spiralt y Coordinate hn Surface preparation of the rotorz z Coordinate n Rotor cross-section preparation Ms Liu area t Tool Figure 1 Rotor Tool and the coordinates (3)P(t, ,)= =(4) (5) (6) (7)Equation (7) in the equation (6) on the basis of the conditions of engagement, into the specific data can be obtained results. To set a parameter t, cross-section of the rotor coordinate x (t) and y (t) and their derivative known Rafah. Through the equation (1) and (2) and the parameters of the valve can be calculated. （8） Meshing conditions show that the spiral in the formation surface, the screw rotor precise tool of a broader and very convenient to use. With related gear envelope production of linear cutter involute line in the example of many in the relevant materials, such as Litin and Fuentes. But Andreev 2 and xing 3 in their recent book by using screw Compressor specific forms of processing tool to screw compressor theory. Stosic 4 propose a suitable rotation of the screw rotor imbalance and do not intersect axis production methods. And Stosic Etal. 5 not only describes the intersection axis method. Equation (10) gives a reverse tool of the special form of the rotor. It can be used to calculate the impact of screw rotor manufacturing processing equipment deficiencies. Tool is given the coordinates, the rotor-line through the coordinates of the points equation (4) the inverse operation can be calculated. Algorithms are as follows; （9） Angle from the next-calculated parameters: （10）Shizi over by equation (!) The inverse operation can be calculated rotor horizontal coordinates x and y. are as follows: （11）Here Once the results worked out along the distribution of the dispersion of meshing tool can be used to calculate the rotor and the coordinates. The same can be identified contact line and the rotor, rotor and contacts between the tool path. Screw compressor line is sealed by a series of points near the rotor component, usually in the gap between the rotor, a similar, knives and the contact line between the workpiece can be regarded as a rotor of the contact line, redundant Preparation should be removed when the rotor machining. If these remaining tool processing of raw materials have not been out, that gap is often overlooked. In this case, presented by the more than expected, with results to calculate the gap tool wear. 2. Ms Liu calculated given the coordinates distribution 2.1 more than expected given the coordinates of the rotorIf the rotor from the processing of raw materials out of a given thickness of the rotor to the vertical surface of a normal position, rough when the rotor plane of the corresponding coordinates and finishing at the rotor plane of the corresponding coordinate the different representatives in the process of cutting the rotor and Tool of relative movement. When the rotor in the calculation of rough circumferential, and the equation (6), a related derivative of the r to determine the normal direction of the rotor. Rotor plane method used to calculate the coordinates. It does not include the rotor cross-section coordinates of the remaining preparation of raw materials, is more than the thickness of material calculated as follows: （12）Here diameter D calculated from the next （13）Preparation of the horizontal coordinates of the rotor can equation (11) worked out at the point of cutting tools for rough coordinates, finishing tool when the coordinates from the original rotor x and y coordinates to calculate. Rough at the rotor plane of the corresponding coordinates and finishing at the rotor plane of the corresponding coordinate the different representatives in the process of cutting tool and the rotor relative movement. When the rotor in the calculation of rough cross-section coordinates, finishing at the cross-section coordinates x, y,. Can get the same conclusion. The conclusions from the rough, can also coordinate the rotor cutter knives and finishing at the coordinates of that.2.2 tool wearThe start given the tools, wear parts and tool and the relative motion between the relevant rate. Rough and finishing tool when the coordinates can illustrate this point. Or through the rough when the rotor and finishing at the rotor plane or cross-section of the difference can be seen. The following example is through the rotor in the rough when the cross-section coordinates and finishing of the cross-section. （14） From the equation (14) can be calculated tool wear, the cutter knives from excessive wear and tear can see the coordinates. The sooner that coordinates changes also wear faster rate. This theory was later used to wear by Cutter calculated by the rotor of the processing line. To wear a specific method is feasible in proportion to gradually enlarge it, stack it to the rotor or tool-line, the right-line position on a reasonable estimate wear.3. Examples of applications3. Examples of industrial application of the rotor is a 5-6 tooth meshing of the yin and yang of mutual rotor, plans were set out two of their engagement, map conversion of the diameter of 144 mm, the rotor helix angle, the rotor center distance To 108 mm.3.1 Cutting tool wear uniformFigure 2 is given by the rotor meshing situation tells us that screw compressor rotor and its engagement in the forming tool is neither parallel nor intersection of the axis. Equation (7) the solution can be calculated Rotor Tool meshing requirements. When the rotor is finishing cross-section point coordinates x, y and, on the rotor of the spiral can coordinate equation (1) obtained. Use the same method of calculation of rotor rough coordinates can be obtained at the thickness of material for more than 50. The meshing of the yin and yang rotor knives, their rotor knives from the Centre for 180 mm and 200 mm. Roughing and finishing tool is the same. Rotor and tool for the axis angle.Uniform caused by the cutting tool wear, the preparation was in order gradually increased 50 times, it superimposed on the coordinates of the tool, charts, three representatives of the curve in the coordinates, the cutter knives on the wear and tear from every point leads to the To a certain length of the line said. Tool of wear and tear of the tool along the line is inconsistent. In the rotor-point line all the perspective. Pressure angle is the same. Under such circumstances, the tool is the smallest of wear and tear, no other case of wear and tear than it big.3.2 more than expected use of cutting tool to reduce the distribution of the wear and tearUneven thickness over a certain amount of material was processed out, is what we expect. Because of uneven thickness of the material would cause more than cutter-type knives along the line the direction of wear. If Ms Liu is deemed to be a uniform distribution of more than expected, so the cycle of wear and tear caused can be a tool wear the uniform. Tool wear the uniform from the economic terms, should be the best option. Because it allows tool in the renovation period, or when to use sharp in the longest time. The new rotor coordinates and the old rotor coordinates x, y in comparison to be reflected in Figure 4. Rotor coordinates of a special online every point from a certain length of the line that coordinates the rotor case-by - Step increases 50 times, wear a result, not all the same.3.3 experimental verificationCalculated by the type of tool wear and get the actual measurement tool wear-line, on the basis of this production of the 150 twin-screw compressors. Figure 5 is rotor meshing of the yin and yang situation. Theory did not wear a given line of the tolerance zone for the 6, it said that a certain degree of wear and tear. Figure in the actual measurement tool wear-line marked by fine line, calculated type of tool wear line marked by rough line. Taken in line with the statement result of this calculation is correct. Figure 4 Figure 54. ConclusionTool wear often occur in the screw compressor rotor machining process. Logically speaking in the hope that the uneven thickness of material from the rotor in the process of being processed out, otherwise it will cause along the tool-wear line thickness inconsistent. If a certain size tool to reverse the processing of surplus materials, will be in uniform thickness of the material, processing tool in the course of a certain rate cutting will produce a uniform tool wear. Gear envelope theory was as a meshing requirements, horizontal helical gears used this to calculate the distribution of preparation, it will cause the finishing tool wear. 中文摘要双螺杆压缩机的设计【摘要】双螺杆压缩机是一种比较新颖的压缩机，因其可靠性高、操作维修方便、动力平衡性好、适应性强等优点，而广泛地应用于矿山、化工、动力、冶金、建筑、机械、制冷等工业部门。双螺杆压缩机已经超过所有工业压缩机的50 ，其市场份额超过80 ，今后其市场份额还将继续扩大。可见，研究双螺杆压缩机具有十分重要的意义。本课题主要是设计通用的喷油双螺杆空气压缩机，采用单边不对称摆线-销齿圆弧型型线，阴、阳转子齿数比为6：4。设计新型转子型线，目的是使接触线长度、泄漏三角形面积和封闭余隙容积3者达到最优化设计，以进一步提高双螺杆压缩机的机械性能。重点研究的是双螺杆压缩机的转子型线设计、几何特性、受力分析、热力学计算。【关键词】双螺杆压缩机转子型线啮合线齿间容积The design of twin screw compressor Abstract The twin-screw compressor is a kind of newly emerging compressor. Because of its high reliability, easy repair, good balance and good adaptability etc, and widely applied to such industrial departments as mine, chemical industry, power, metallurgy, architecture, machinery, refrigeration, etc. By designing the project, the volumetric efficiency is 70%, the compressed temperature is more 80。It is very important to design and research a twin-screw compressor in industrial. The project is to design a universal twin-screw air compressor, and to adopt single side asymmetric swept line unilaterally and dowel tooth circular rotor profile. There are six lobes on the female rotor and four lobes on the male rotor. The aim of designing a new rotor profile is to optimize the contact line length, blowhole area and clearance volume. That can improve the mechanical performance of a twin-screw compressor further. The project is mainly to research a twin-screw compressor rotor profile, geometry characteristic, mechanics analysis, thermodynamics calculation Keywords A twin-screw compressor, rotor profile, mesh curve, tooth space volume.目录毕业设计(论文)任务书.开题报告.指导教师审查意见.评阅教师评语.答辩会议记录.中文摘要.外文摘要.前言. .11选题背景. .31.1研究双螺杆压缩机的目的和意义31.2双螺杆压缩机的特点和应用前景31.3国内外双螺杆压缩机研究的进展51.4双螺杆压缩机基本结构和工作原理62双螺杆压缩机的转子型线设计. .92.1转子型线设计原则92.2型线方程和啮合线方程102.3单边不对称摆线-销齿圆弧型线 103双螺杆压缩机螺杆尺寸的确定. 234几何特性. 234.1齿间面积和面积利用系数234.2齿间容积及其变化过程244.3扭角系数及内容积比275双螺杆压缩机的热力学计算. 285.1内压力比285.2容积流量及容积效率285.3轴功率295.4电动机功率315.5电功率316双螺杆压缩机的结构设计317双螺杆压缩机的力学计算317.1径向力的计算327.2轴承支反力的计算347.3轴向力的计算348双螺杆压缩机的吸、排气孔口设计358.1吸气孔口368.2排气孔口379主要零部件设计和选材. .3810双螺杆压缩机压力脉动计算39结束语. 43参考文献. . .44附录. . . 螺杆压缩机转子加工中刀具磨损的几何计算方法摘要：螺杆压缩机转子加工有磨削和铣削两种方法，通常分两个阶段进行加工；第一阶段为粗加工，当工件被加工到它的大概尺寸即可；第二阶段为精加工，当转子被加工成它的最终尺寸时完成。材料或切削余量在精加工中被除掉，它是由磨削和铣削加工时切削刀具的设计所决定的。考虑到螺杆压缩机的转子是螺旋形状，在切削过程中，刀具上的每一点与转子的横向接触线长度是不一样的，因此，精加工时刀具的磨损速率沿着它的型线也是不一致的。包络线的啮合理论被用于这里来计算在切削加工过程中刀具上的每一点和转子之间的相对运动。以一定的比例尺，在此相对运动的假设下，计算出刀具上每一点的磨损速率。通过计算结果和实验得出的刀具的磨损速率的比较，可以看出两者的结论是一致的。在这个基础上，可以知道怎样去制造一种粗加工时使半加工余料变薄的刀具，从而促使精加工时刀具的磨损速率一致。一种相似的技术正被应用于许多机器的加工过程中，而多种成型刀具也是被用于这些技术上。关键字：螺杆压缩机；螺旋转子；制造刀具1介绍：螺杆压缩机属于正排气量的回转式容积机器，它主要由一对啮合的螺旋转子组成，转子在机壳内做回转运动，它的容积随着转子的旋转而发生变化。今天的螺杆转子主要被造成盘型，来用于铣削或者磨削加工。无论是哪种形式加工出来的转子，可以用转子的坐标系来定义它们的几何特性，如图1所示。要使螺杆压缩机运行良好，转子必须啮合得恰当，且在整个转子接触线中要保留一定的密封。这就要求有适合这种加工的刀具，且必须由合理的啮合过程计算出来。齿轮包络线的加工方法，如果在一个特定的相对运动中一个表面包络另一个表面，说明这两个表面是啮合的。方程（1）定义了给定的表面，第二个表面由方程（2）和方程（3）给出。转子在x,y工作表面的坐标变化函数为x(t)和y(t)。通过x(t)和y(t)就可以定义转子的型线，图2就是一个典型的例子。方程(4)给出了一个熟悉的啮合表面。它们对转子坐标和刀具坐标的求导就可以得到方程(5).方程(5)中的C代表转子轴中心线之间的距离，是转子和刀具轴之间的角度。h和t分别指转子和刀具的表面。这些表面的包络线方程由方程(6)中的回转角度以函数的形式表示出来。因为生成的表面是由参数t来定义的，包络线的情况可以用来计算另一个参数，它是转子的回转角，是生成啮合表面的一个因素。包络线方程中的横截面的生成说明线是属于该平面的，而是两表面一般点的相对速度，是刀具回转角度。转子的的导程由每个转子的回转角度来确定；r (t, )=xcos-ysin,xsin+ycos,p(1)(2)命名C 转子刀具中心距转子回转角度P 转子每弧度导程转子型线角度 tan=R 刀具型线坐标压力角 tan=r 转子矢量坐标轴角度 s 刀具磨损测量刀具角度t 转子参数 x x 坐标 h 螺旋状转子t y坐标 hn 转子法面备料z z 坐标 n 转子横截面备料余料面积 t 刀具图1 转子和刀具的坐标系 (3)P(t, ,)= =(4) (5) (6) (7)方程(7)在方程(6)的基础上得到了啮合条件，代入具体的数据就可以求出结果。给定一个参数t,转子横截面的点坐标x(t)和y(t)和它们的导数就知道拉。通过方程(1)和（2）和阀门的参数可以计算出.图2 双螺杆压缩机转子改进的阀门参数可以通过方程（7）算出。这个过程一直重复进行直到两个连续阀门之间的差异变得足够小为止。刀具横截面的点坐标可以通过方程（4）算出。（8）啮合条件表明，在生成螺旋表面时，精确的螺杆转子刀具应用较广泛且使用很方便。有关用齿轮包络线方法生产直线刀具渐开线的例子在很多教材中有相关的介绍,例如Litin和Fuentes.然而Andreev2和xing3最近在他们的书中提出了用螺杆压缩机特定形式的刀具来加工螺杆压缩机的理论。Stosic4提出了一种合适的有关螺杆旋转转子不平衡和不相交轴的生产方法。而Stosic Etal.5只描述了不相交轴的方法。方程（10）给出了一种逆向刀具转子的特殊形式。它可以用来计算影响螺杆转子制造加工设备的不足之处。给出刀具的坐标，转子型线的点坐标通过方程（4）的逆运算可以算出。算法如下；（9）角度参数由下式算出：（10）以上式子通过方程（！）的逆运算可以计算出转子横向坐标x和y. 如下：（11）这里结果一旦计算出来，沿着分布图的分散性可以用来计算啮合刀具和转子的坐标系。同样可以确定接触线和转子，转子和刀具之间的接触路径。螺杆压缩机的密封线是由转子附近一系列的点组成的，通常在转子之间存在间隙，类似的，刀具和工件之间的接触线可以被当作是转子的接触线，多余的备料应从转子加工时除去。如果这些剩余原材料没有被刀具加工掉，通常被认为是间隙忽略。在这种情况下，通过给出的余料，用间隙结果来计算出刀具的磨损量。2计算给定余料的坐标分布2.1 给定余料的转子坐标如果把从转子加工掉的原材料厚度给定到转子竖直表面的一个正常位置,粗加工时转子法平面对应的坐标和精加工时转子法平面对应的坐标的不同代表在切削加工过程中转子和刀具的相对运动。在计算粗加工时转子横截面上，与方程（6）第一个有关的的r的导数，确定了转子的法线方向。用来计算转子法平面的坐标。它包括转子横截面没有剩余备料的原材料坐标，给出的余料厚度计算如下：（12）这里直径D由下式算出（13）备料转子的横向坐标可以通过方程（11）计算出来，角度为粗加工时刀具的坐标，精加工时刀具的坐标由原始的转子坐标x和y来计算。粗加工时转

温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。