鍾添東臺灣大學:機械工程學研究所周代翔Chou, Tai-HsiangTai-HsiangChou2010-06-302018-06-282010-06-302018-06-282008U0001-2707200823313700http://ntur.lib.ntu.edu.tw//handle/246246/187327本文針對創新之爪式轉子引擎設計進行研究。先提出兩種概念設計之爪式轉子引擎並針對其優缺點發展第三種改良之設計。接著以參數化系統之方式配合3D繪圖軟體建立引擎之實體模型。而此轉子引擎前後之排列包括齒輪組、壓縮組、緩衝組、燃燒組及若干塊側板。除了齒輪箱內之一對正時齒輪外，壓縮組與燃燒組內各包含一外殼及一對轉子。且每顆轉子輪廓皆為特殊之共軛曲線構成三葉片之設計。緩衝腔由兩塊板子構成，其作用在於調節油氣混合氣之壓力及控制壓縮腔與燃燒腔連通之時機。兩根傳動軸串起齒輪及轉子並帶動之。而壓縮腔轉子與燃燒腔轉子之相位角之探討與分析減少了壓縮功之浪費。接著對於不同緩衝腔至燃燒腔流道之設計進行空氣流量之分析，進而改善引擎性能。利用力學原理計算爪式轉子引擎之扭矩與面積效率並與Wankel引擎、活塞引擎比較證明了爪式轉子引擎之優越性能。而運用數個爪式轉子以不同排列方式發展多轉子之爪式轉子引擎也證明其為優良之機構設計。最後除了以壓克力材料製作一展示用之爪式引擎外也進行初型機之加工與組裝。This paper describes the development of a new and innovative claw rotor engine. At first, two concept designs of the claw rotor engine are presented, where the advantages and shortcomings are modified to develop the third concept design. The third concept design includes transmission assembly, compression assembly, buffer assembly, combustion assembly, and several intermediate walls located front and rear. The transmission assembly contains a pair of timing gears. Each of the compression and combustion assembly has a housing and a pair of rotors, where the driving rotor has 3 same claws with profiles of repetitive lines and arcs, and the driven rotor profile consists of conjugate curves of the driving rotor. The gears and rotors are mounted on two shafts which are used for power transmission. The buffer assembly is combined with two intermediate walls to make the fuel-air mixture with the appropriate pressure flow into the combustion chamber from the compression chamber. Then, the phase angle difference between the compression and combustion rotors is changed to reduce the dissipated negative work in the compression process. In the meantime, amount of air flows from the buffer chamber to the combustion chamber in several passage designs are also simulated and compared to improve the performance of the claw engine. Engine performances between piston engine, Wankel engine and the developed claw engine are roughly estimated and compared, and it shows that the new claw engine has better performances. Besides, a special lateral arrangement with several claw rotors is also demonstrated to reveal the possibility of other the claw rotor engine configurations. Finally, an acrylic model and a prototype of the new claw rotor engine are manufactured such that the working principle of the engine can be demonstrated.Table of contentscknowledgement I要 IIIbstract Vable of contents VIIist of figures IXist of tables XIIIist of symbols or abbreviations XVhapter 1 Introduction 1.1 Introduction 1.2 Paper review 5.3 Motivation and purpose of the research 12hapter 2 Mechanical principles and engine theories 15.1 Engine cycles 15.2 Ideal gas law utilized for engine 16.3 Combustion process with different compression ratio 17.4 Definition and theory of piston engine 18.5 Theory and application of claw rotor 20.6 Geometry of Wankel engine 23.7 Area efficiency of the roots vacuum pump 26hapter 3 Fundamental of the claw rotor engine 29.1 Design goal and Characteristics of claw rotor 29.2 Proposal of the claw engine design 30.2.1 First concept design of claw rotor engine 30.2.2 Second concept design of claw rotor engine 34.2.3 Discussion 39.2.4 Third concept design with detail mechanism 41.2.5 Operation of the claw rotor engine 49.3 The 3D model of the claw rotor engine 51.4 Phase angle difference between compression and combustion rotors 53.5 Three types of the buffer design 61hapter 4 Analysis of engine performances and prototype manufacturing 69.1 Calculation and comparison of engine torque and work 69.2 Engine area efficiency calculation and comparison 77.3 Claw rotor engines with multiple stages and rotors 82.4 Prototype manufacturing of claw rotor engine 89.4.1 Acrylic engine model for demonstration 89.4.2 Manufacturing of prototype 90hapter 5 Conclusions and perspectives 95.1 Conclusions 95.2 Perspectives 97eferences 99ppendix A Detailed design of claw rotor engine 101.1 Side seal 101.2 Oil circuit 102.3 Shaft and bearing 105.4 Apex seal 107ppendix B Torque calculation of Wankel engine and piston engine 109.1 Torque of Wankel engine 109.2 Torque of piston engine 111ppendix C Basic theory of mechanics 115.1 Parallel axis theorem 115.2 Two-force principle 116ppendix D Pressure drop analysis 117.1 Major losses 117.2 Minor losses 118.3 Pressure drops of three buffer designs 1205449822 bytesapplication/pdfen-US爪式轉子轉子引擎參數化實體模型共軛曲線Claw rotorsrotary engineparametric modelingconjugate curvesthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/187327/1/ntu-97-R95522635-1.pdf