机械专业外文文献翻译外文翻译螺杆压缩机的几何形状.doc

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1、中文译文2螺杆压缩机的几何形状 (2.12) 简介部分A1D1在主转子的圆形半径，0T2。 (2.13) C1D1段出现作为一个次摆线在主转子所产生的圆的半径r4在大门口转子。曲线是从门转子坐标通过相同的啮合过程。圆C2D2是： （2.14）现在，当主旋翼的所有片段都是已知的，它们被用来作为源曲线。门转子叶现在会被完全产生在上一节中描述的啮合过程。虽然本质上是简单的，演示文件包含所有功能用现代的螺杆转子型线。压力角同时，扁平和圆形轮廓的裂片不为零。这是至关重要的成功的制造。轮廓由曲线和不产生点。这进一步增强了其可制造性。通过改变其参数，C，R，R0，R2，R3和R4，各种曲线可以产生，一些正栅

2、极转子力矩，有的适合低压力比，和其他人高压缩比压缩。配置文件是完全计算机化，可以用于演示，教学和发展的目的。2.4.2 SKBK剖面图2.6 SKBK剖面 1977 SKBK剖面是第一个在公开的俄罗斯文献中出现的现代的轮廓，如图2.6所示。简介了相同的布局和序列段，除了演示文件事实上，R2和R3线段所取代AB和AF的产生。这可以很容易地实现如果在演示型R2和R3趋于零。同样的演示文件，SKBK型材偏心圆在主旋翼的圆形叶，给出了压力角不同在节圆的面积为零。这进一步使其易于制造和栅极转子力矩的稳定性。这一特点的SKBK简介已经至少出版了五年前的开关磁阻电机转子的专利“D”它声称相同的特征。然而，由

3、于在平面叶边主门转子由点和在栅极和主要产生转子分别从E位于栅极转子的齿圈，在节圆上的压力角的平面侧为零。这是不允许的通过铣削或磨削除非型材制造该剖面。2.4.3傅声简介图 2.7 傅声剖面傅声曲线，如图2.7所示，是几乎一样的示威者，但有一个特点。线段AB是一个椭圆。2.4.4“超”的文件“超”的配置文件几乎是为傅声分布相同，除了线段AB，这是在主转子代替椭圆双曲线傅声原来的轮廓。然而，尽管有这样的一个小的差异，“超”是一个更好的轮廓给较大的螺杆压缩机的位移，一较短的密封线和较强的转子叶栅。日立的轮廓有相同的布局为“超”的文件。2. 4 .5“”剖面“”是一个相对旧的配置文件。它诞生于20世纪

4、年底年代作为对SRM授予独占许可证的Aerzener德国。其他的德国汽车制造商,如GHH和凯瑟尔因此,需要开发自己的配置文件。“”,显示在图。2.8是一个美丽的和高效的配置文件。然而,新的和更好的资料现在可用。平面一侧的“”叶一样的示威者概要文件,但是圆边的概要文件生成从平面侧的信封的圆圈,它涉及平面和圆边,半径的提前给予。这是一个可以接受的方法配置生成的如果没有更多的一般是已知的,但严重限制了生成过程。有几个修改“”剖面。其中的一个,这是这里提出,由一条直线圆边的BC2大门口转子。这种改性大大提高了剖面,它是比原来少有限。图2.8 西格玛剖面2.4.6“气旋”剖面“气旋”显示在图2.9是一个

5、概要文件由康普艾开发。布局和序列的剖面段没有完全不同的演示,但“气旋”介绍了parabolae代替圈在公元前片段,GH和JH。 的一个有趣特性“气旋”剖面是“负面”转矩在大门口转子导致转子接触的平面一边的转子。图2.9 Cyclon概况2 .4 .7对称剖面对称剖面,显示在图。2.10是非常简单的,由三个圈主转子在中心位置无论是在转子中心或在节圆的主要转子。因为圈主转子与转子中心的中心要么或节圆,他们只生成圈了门转子与中心无论是在转子中心,或在转子齿节圆。因此不足为奇的是这是第一次吗螺杆转子概要文件生成过。段D1E1是一个圆的半径r1w与其中心r0的转子轴,而段E1F1是一个圆的半径r0的。段

6、F1A1是一个圆圈的半径r。两个,最后两段有其中心在转子螺距圆。进一步段类似于给定的对称。图2.10 对称圆形轮廓有一个巨大的对称剖面面积不包括它从水中憋气任何压缩机应用程序中一个高或中度压力比是涉及。然而,对称剖面表现令人惊奇的好低压力压缩机的应用程序。更详细的圆形轮廓可以发现在马戈利斯,1978.2 4 8 SRM”“剖面“一个”的SRM概要显示在图2.11。它保留了所有有利的特性的对称剖面喜欢它的简单,同时避免其主要缺点,即大水中憋气区。主要的目标是降低了气孔面积是通过允许提示点的主要和门转子产生他们的同行,trochoids在门和主旋翼分别。“一个”剖面主要由转子和圈了门一行通过大门口

7、转子轴。主曲线的设置包括:D2C2,这是一个圆形的门转子与中心门口节圆,C2B2,这是一个圆在大门口转子,该中心位于外的节圆区域。这是一个新的功能实施的一些问题在一代的主旋翼同行,因为数学用于配置生成当时通用传动装置不足。这偏心保证压力角的转子球不同于零,导致它的易于制造。段是一个圆形的英航转子以其中心门在节圆。扁平的叶边的主要和门出现生成hypocycloids epi /由分G和H的门主转子分别。是一个径向线GF2门口的转子。这带来了同样的制造业的好处前面提到的圆偏心在对面的叶侧。F2E2是一个圆的中心在大门口音高和最后,E2D2是一个圆的中心在门轴。更多的细节在”一个“剖面将被Amoso

8、v et al出版。1977和剩余的,1979。“A”配置文件是一个很好的例子,一个好的和简单的想法如何进化成一个复杂的结果。因此,“A”剖面是不断遭受这导致变化的“C”剖面。这主要是生成改善剖面可制造性。最后,一个完全新的配置文件,“D”剖面生成了一个新的发展介绍在剖面传动装置和增加门转子扭矩。尽管其最终形式的复杂性的“A”剖面出现的最受欢迎的螺杆压缩机剖面,特别是在其专利过期。图 2.11 “A”概要SRM2. 4 .9 SRM“D”剖面SRM的“D”剖面,显示在图2.12,生成完全由圆圈从转子的中心距圈。类似于示威者,C2D2是一个偏心圆的半径r3上大门口转子。B1C1是一个偏心圆的半径

9、r1,再加上小圆弧的半径A1J1 r2,位置在主转子。G2H2是一个小圆弧转子和E2F2的门是一个圆弧的门转子。F2G2是一个相对大的圆弧转子产生的门相应的曲线的最小曲率在主转子。两个圆弧,B2C2和F2G2确保大曲率半径的节圆面积。这避免了高应力在转子接触区。图 2.12 SRM“D”剖面2.4.10 SRM“G”剖面“G”概要的介绍,并通过SRM在年代末作为替换为“D”转子和图2.13所示。相比“D”的“G”转子,转子具有独特特征的两个额外的圆圈两叶的齿顶区域的主旋翼,靠近节圆。这个特性提高了转子接触,此外,生成较短密封线。这可以从图2.13,一个转子具有“G”剖面只有在它的平的面特征通过

10、段提出了H1I1。图 2.13 SRM“G”剖面2. 4 .11城市“N”架产生转子剖面“N”是计算转子架代过程。这种区分他们从任何其他人。在这种情况下,大水中憋气区,这是一个特点生成齿条的转子,是克服通过生成高压力侧架通过转子共轭过程。这削弱了单一的适当的曲线放在架子上。这样一架然后用于分析两个主要的和门的转子。该方法及其扩展使用通过作者创建许多不同的转子概要,其中一些使用通过Stosic et al。,1986年,Hanjalic和Stosic,1994。 其中一个应用程序的架在Stosic描述生成程序,1996。下面是一个简短的描述生成一架“N”转子剖面,典型的家庭的转子概要设计高效的压

11、缩空气,常见的制冷剂和一系列过程气体。生成的转子通过组合架转子一代的过程,它的特点是这样的它可以很容易地修改进一步优化性能对于任何特定的应用程序。英文原文2 Screw Compressor Geometryx01 = (r1i r3) cos 2 + r3 cos ty01 = (r1i r3) sin2 + r3 sin t (2.12)Profile portion A1D1 is a circle of radius r2 on the main rotor, 0 t 2.x01 = r1e r2 cos ty01 = r2 sin t (2.13)Segment C1D1 emerg

12、es as a trochoid on the main rotor generated by the circle of radius r4 on the gate rotor, 4 1 t 1. The trochoid is obtained from the gate rotor coordinates through the same meshing procedure.The circle C2D2 is:x02 = (r2e r4) cos 1 + r4 cos ty02 = (r2e r4) sin1 + r4 sin t (2.14)Now, when all the seg

13、ments of the main rotor are known, they are used as source curves. The gate rotor lobe can now be generated completely by the meshing procedure described in the previous section. Although essentially simple, the Demonstrator profile contains all the features which characterize modern screw rotor pro

14、files. The pressure angles on both, the flat and the round profile lobes are not zero. This is essential for successful manufacturing. The profile is generated by the curves and not by points. This further enhances its manufacturability. By changing its parameters, C, r, r0, r2, r3 and r4, a variety

15、 of profiles can be generated, some with positive gate rotor torque, some suitable for low pressure ratios, and others for high pressure ratio compression. The profile is fully computerized and can be used for demonstration, teaching and development purposes.2.4.2 SKBK ProfileAmosovs 1977 SKBK profi

16、le is the first modern Russian profile to be published in the open literature and it is shown in Fig. 2.6. The profile has the same layout and sequence of segments as the Demonstrator profile apart frothe fact that the circles r2 and r3 the substituted by cycloids and the segments AB and AF are gene

17、rated by point generation. This can be readily achieved if r2 and r3 in the Demonstrator profile tend to zero. Similarly to the Demonstrator profile, SKBK profile has an eccentric circle on the round lobe of the main rotor, which gives a pressure angle far different from zero in the pitch circle are

18、a. This further ensures both its ease of manufacture and the gate rotor torque stability. This characteristic of the SKBK profile was published at least five years prior the SRM “D” rotor patents which claimed the same feature. However, since the flat lobe sides on the main and gate rotors are gener

19、ated by points E and A on the gate and main rotor respectively and since E is positioned on the gate rotor pitch circle, the pressure angle at the pitch circle on the flat side is zero. This does not allow manufacturing of this profile by milling or grinding unless the profile is modified.Fig. 2.6.

20、SKBK ProfileFig. 2.7. Fu Sheng Profile2.4.3 Fu Sheng ProfileThe Fu Sheng profile, as shown in Fig. 2.7, is practically the same as the Demonstrator, but has one distinguishing feature. The segment AB is an ellipse.2.4.4 “Hyper” ProfileThe “Hyper” profile is virtually the same as the Fu Sheng profile

21、 apart from the segment AB, which is a hyperbola on the main rotor instead of the ellipse of the original Fu Sheng profile. However, despite such a small difference, the “Hyper” is a better profile giving larger screw compressor displacement, a shorter sealing line and stronger gate rotor lobes. Th

22、e Hitachi profile has the same layout as the “Hyper” profile.2.4.5 “Sigma” ProfileThe “Sigma” is a relatively old profile. It was developed in the late nineteen seventies as a response to SRM awarding an exclusive licence to Aerzener in Germany. Other German manufacturers, such as GHH and Kaeser, th

23、erefore, needed to develop their own profiles. The “Sigma”, shown in Fig. 2.8 is a beautiful and efficient profile. However, new and better profiles are now available. The flat side of the “Sigma” lobe is the same as that of the Demonstrator profile, but the round side of the profile is generated fr

24、om the flat side by an envelope of circles, which touch both the flat and the round sides, the radii of which are given in advance. This is an acceptable method of profile generation if nothing more general is known, but seriously limits the generation procedure. There are several modifications of t

25、he “Sigma” profile. One of these, which is presented here, comprises a straight line BC2 on the round side of the gate rotor. This modification significantly improves the profile, which is less limited than the original.Fig. 2.8. Sigma Profile2.4.6 “Cyclon” ProfileThe “Cyclon” shown in Fig. 2.9 is a

26、 profile developed by Compair. The layout and sequence of profile segments are not so different from the Demonstrator, but the “Cyclon” introduces parabolae instead of circles in segments BC, GH and JH. One of the interesting features of the “Cyclon” profile is the “negative” torque on the gate roto

27、r which results in rotor contact on the flat side of the rotors.Fig. 2.9. Cyclon Profile2.4.7 Symmetric ProfileThe Symmetric profile, shown in Fig. 2.10 is very simple and consists of three circles on the main rotor with centres positioned either on the rotor centre or on the pitch circle of the mai

28、n rotor. Since the circles are on the main rotor with centres either at the rotor centre or on the pitch circle, they only generate circles on the gate rotor with centres either in the rotor centre, or on the rotor pitch circle. Is is therefore not surprising that this was the first screw rotor prof

29、ile ever generated.Segment D1E1 is a circle of radius r1w r0 with its centre on the rotor axis, while segment E1F1 is a circle of radius r0. Segment F1A1 is on a circle of radius r. Both, the last two segments have their centres on the rotor pitch circle. Further segments are symmetrically similar t

30、o the given ones.Fig. 2.10. Symmetric Circular ProfileThe Symmetric profile has a huge blow-hole area which excludes it from any compressor application where a high or even moderate pressure ratio is involved. However, the symmetric profile performs surprisingly well in low pressure compressor appli

31、cations. More details about the circular profile can be found in Margolis, 1978.2.4.8 SRM “A” ProfileThe SRM “A” profile is shown in Fig. 2.11. It retains all the favourable features of the symmetric profile like its simplicity while avoiding its main disadvantage, namely, the large blow-hole area.

32、The main goal of reducing the blow hole area was achieved by allowing the tip points of the main and gate rotors to generate their counterparts, trochoids on the gate and main rotor respectively. The “A” profile consists mainly of circles on the gate rotor and one line which passes through the gate

33、rotor axis. The set of primary curves consists of: D2C2, which is a circle on the gate rotor with the centre on the gate pitch circle, and C2B2, which is a circle on the gate rotor, the centre of which lies outside the pitch circle region. This was a new feature which imposed some problems in the ge

34、neration of its main rotor counterpart, because the mathematics used for profile generation at that time was insufficient for general gearing. This eccentricity ensured that the pressure angles on the rotor pitches differ from zero, resulting in its ease of manufacture. Segment BA is a circle on the

35、 gate rotor with its centre on the pitch circle. The flat lobe sides on the main and gate rotors were generated as epi/hypocycloids by points G on the gate and H on the main rotor respectively. GF2 is a radial line at the gate rotor. This brought the same benefits to manufacturing as the previously

36、mentioned circle eccentricity on the opposite lobe side. F2E2 is a circle with the centre on the gate pitch and finally, E2D2 is a circle with the centre on the gate axis.More details on the “A” profile are published by Amosov et al., 1977 and by Rinder, 1979.The “A” profile is a good example of how

37、 a good and simple idea evolved into a complicated result. Thus the “A” profile was continuously subjected to changes which resulted in the “C” profile. This was mainly generated to improve the profile manufacturability. Finally, a completely new profile, the “D” profile was generated to introduce a

38、 new development in profile gearing and to increase the gate rotor torque.Despite the complexity of its final form the “A” profile emerged to be the most popular screw compressor profile, especially after its patent expired.2.4.9 SRM “D” ProfileThe SRM “D” profile, shown in Fig. 2.12, is generated e

39、xclusively by circles with the centres off the rotor pitch circles. Similar to the Demonstrator, C2D2 is an eccentric circle of radius r3 on the gate rotor. B1C1 is an eccentric circle of radius r1, which, together with the small circular arc A1J1 of radius r2, is positioned on the main rotor. G2H2

40、is a small circular arc on the gate rotor and E2F2 is a circular arc on the gate rotor. F2G2 is a relatively large circular arc on the gate rotor which produces a corresponding curve of the smallest possible curvature on the main rotor.Both circular arc, B2C2 and F2G2 ensure a large radius of curvat

41、ure in the pitch circle area. This avoids high stresses in the rotor contact region.Fig. 2.11. SRM “A” ProfileFig. 2.12. SRM “D” Profile2.4.10 SRM “G” ProfileThe “G” profile was introduced by SRM in the late nineteen nineties as a replacement for the “D” rotor and is shown in Fig. 2.13. Compared wit

42、h the “D” rotor, the “G” rotor has the unique feature of two additional circles in the addendum area on both lobes of the main rotor, close to the pitch circle.This feature improves the rotor contact and, additionally, generates shorter sealing lines. This can be seen in Fig. 2.13, where a rotor fea

43、turing “G” profile characteristics only on its flat side through segment H1I1 is presented.Fig. 2.13. SRM “G” Profile2.4.11 City “N” Rack Generated Rotor Profile“N” rotors are calculated by a rack generation procedure. This distinguishes them from any others. In this case, the large blow-hole area,

44、which is a characteristic of rack generated rotors, is overcome by generating the high pressure side of the rack by means of a rotor conjugate procedure. This undercuts the single appropriate curve on the rack. Such a rack is then used for profiling both the main and the gate rotors. The method and

45、its extensions were used by the authors to create a number of different rotor profiles, some of them used by Stosic et al., 1986, and Hanjalic and Stosic, 1994. One of the applications of the rack generation procedure is described in Stosic, 1996. The following is a brief description of a rack gener

46、ated “N” rotor profile, typical of rotor profiles designed for the efficient compression of air, common refrigerants and a number of process gases. The rotors are generated by the combined rack-rotor generation procedure whose features are such that it may be readily modified further to optimize performance for any specific application.