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研究生:趙柏凱
研究生(外文):Po-Kai Chao
論文名稱:具變擺線比外擺線之新型爪式轉子外形發展
論文名稱(外文):Development of New Claw Rotor Profiles with Variable Trochoid Ratio Epicycloid Curves
指導教授:鍾添東鍾添東引用關係
口試委員:劉正良劉霆
口試日期:2013-07-02
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:機械工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:英文
論文頁數:94
中文關鍵詞:爪式轉子爪式轉子修正尖端擺線修正型擺線
外文關鍵詞:Claw rotorModified claw-shapeCycloidModified cycloid
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本論文發展出具變擺線比外擺線之新型爪式轉子外形設計方法。此種爪式轉子之單一爪部外形由一外擺線、兩段圓弧、一段由具變擺線比外擺線所產生之曲線以及其對應之共軛曲線所組成。此轉子輪廓由若干外形相同之爪部所構成,而轉子對由兩外形相同之爪式轉子組成。其單一爪部可以被四個基本設計參數以及一個調整係數所決定。四個基本設計參數包括轉子外徑、節圓半徑、爪數與密封角角度。調整係數為一介於0到1之間數值,其功用是用來調整爪部輪廓之平滑度。有兩種修正爪形在本篇論文被提出,一種是利用部份擺線齒輪輪廓,另一種則是利用部分修正型擺線齒輪輪廓。此種修正爪部相較其他相似之修正爪部,可提供轉子對之間較良好之密封性,進而幫浦效率增加。此修正爪部也可以避免在組裝及運轉的過程中因為誤差而產生之碰撞。

This thesis develops design methods for new claw rotor profiles with variable trochoid ratio epicycloid curves. Each claw profile of a rotor consists of an epitrochoid, two arcs, an epicycloid with variable trochoid ratio, and a conjugate curve corresponding to the epicycloid. The rotor profile consists of several identical claws and the claw rotor pair consists of two identical rotor profiles. The profile of a single claw is determined by four basic design parameters and one adjusting coefficient. The four basic design parameters include pitch radius, rotor radius, number of claws and a conformity angle. The adjusting coefficient with value between 0 and 1 is used for adjusting the smoothness of the claw rotor profile. Two types of modified claw-shape are also proposed, one uses portion of a cycloid gear tooth profile, the other uses portion of a modified cycloid gear tooth profile. The proposed modified claw-shape has better sealing property between rotors than the similar types of modified claw-shape. The proposed modified claw-shapes can avoid the crash and locking between the rotor pair because of the smooth contour.

ABSTRACT i
摘要 iv
CONTENTS v
LIST OF FIGURES viii
LIST OF SYMBOLS xiv
Chapter 1 Introduction 1
1.1 Introduction 1
1.2 Classification of rotary pumps 2
1.3 Paper review 6
1.4 Motivation 15
1.5 Outline 16
Chapter 2 Mechanical principles and pump theories 18
2.1 Specific flow rate and area efficiency 18
2.2 Coordinate transformation matrix 19
2.3 Pump efficiency 21
2.4 Roots rotor profile with variable trochoid ratio 22
2.4.1 Addendum curve with shortened epicycloid 23
2.4.2 Roots rotor profile with variable trochoid ratio 24
2.5 Design of original and modified claw-shape profile 28
2.6 Tooth profiles of external gear pumps 32
2.6.1 Cycloid tooth profile 32
2.6.2 Modified cycloid tooth profile 35
Chapter 3 Geometric designs of claw rotor profiles and modified claw-shape profiles 38
3.1 Geometric design of new type claw rotor 38
3.1.1 Design of new type claw rotor 38
3.1.2 Function of trochoid ratio 46
3.2 Geometric design of modified claw-shape 53
3.2.1 Cycloid 54
3.2.2 Modified cycloidal curve 56
3.3 Computer aided design 58
Chapter 4 Performance analysis 61
4.1 Performance analysis of new type claw rotors 61
4.2 Performance analysis of modified claw-shapes 66
4.2.1 Area efficiency 66
4.2.2 Length of leakage path 70
4.2.3 Machining allowance of claw rotors 79
Chapter 5 Conclusions and suggestions 82
5.1 Conclusions 82
5.2 Suggestions 83
Chapter 6 Reference 84
Appendix A: Interface of AutoCAD program 86
Appendix B: The lisp program for new type claw rotor 88


[1]R. Dearn, ‘‘The fine art of gear pump selection and operation,’’ World Pumps, pp. 38-40, 2001.
[2]H. C. Liu, Tong, S. H. and Yang, D. C. H., ‘‘Trapping-free rotors for high-sealing lobe pumps,’’ ASME Journal of Mechanical Design, vol. 122, no. 4, pp. 536–542, 2000.
[3]Hydraulics & Pneumatics, “Hydraulic Pumps,” Fluid Power Handbook & Directory, pp.119-127, 1998-1999.
[4]U.S. patent 4,504,201, “Mechanical pumps,” 1985.
[5]U.S. patent 5,046,934, “Twin shaft vacuum pump with purge gas inlet,” 1991.
[6]U.S. patent 5,697,772, “Screen rotor and method generating tooth profile therefor,” 1997.
[7]U.S. patent 6,364,642, “Rotary piston mechine with three-blade rotors,” 2002.
[8]U.S. patent 7,128,543, “Compressor mechine with two conter-rotating rotors,” 2006.
[9]U.S. patent 4,543,048, “Stepped-disc pump,” 1985.
[10]C. F. Hsieh, Y. W. Hwang, and Z. H. Fong, “Study on the tooth profile for the screw claw-type pump,” Mech. Mach. Theory, vol. 43, no. 7, pp. 812-828, 2008.
[11]F. Cao, Y. Peng, Z. Xing, and P. Shu, “Thermodynamic performance simulation of a twin-screw multiphase pump,” Proc. IMechE, Part E: J. Process Mechanical Engineering, vol.215, no.2, pp.157-163, 2001.
[12]C. F. Hsieh, “A study of the geometric design and gas port of the claw-type rotor,” J. Mechanocal Engineering Science, vol. 223, part C, 2009.
[13]C. F. Hsieh, Y. W. Hwang, “Study on the high-sealing of roots rotor with variable trochoid ratio,” ASME Transaction, Journal of Mechanical Design, vol. 129, pp. 1278-1284, 2007.
[14]U.S. patent 6,139,297, “Double worm system,” 2000.
[15]U.S. patent 6,056,804, “High frequency rotary pressure swing adsorption apparatus,” 2000.
[16]K. Nagamura, K. Ikejo, and F.G. Tutulan, “Design and performance of gear pumps with a non-involute tooth profile,” Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture, Vol.218, pp.699–710, 2004.
[17]U.S. patent 7,565,741, “Methods for designing lobe type rotors,” 2009.
[18]T.W. patent 101,137,987 “Device of a pair of claw-type rotorshaving same rpofiles,” 2012. (Traditional Chinese)
[19]C. G. Fu, Design of a Liquid Pump with New Claw Rotors, National Taiwan University Master Thesis , July, 2009. (Traditional Chinese)
[20]H. W. Wang, Design of a New Fluid Pump with Helical Claw Rotors, National Taiwan University Master Thesis , July, 2010.
[21]L. U. Kung, Clearance and Leakage Analysis of a Liquid Pump with Claw Rotors, National Taiwan University Master Thesis , July, 2011.
[22]C. F. Hsieh, Y. W. Hwang, “Study on the high-sealing of roots rotor with variable trochoid ratio,” ASME Transaction, Journal of Mechanical Design, vol. 129, pp. 1278-1284, 2007.
[23]N. Manrig, ”Measuring pump efficiency: uncertainty considerations,” Transaction of ASME, vol. 127, pp.280-284, 2005.


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