新型爪式轉子引擎之設計與分析

Design and Analysis of a New Claw Rotor Engine

周代翔(Tai-Hsiang Chou)

指導教授 ： 鍾添東

國立臺灣大學/工學院/機械工程學研究所/碩士(2008年)

https://doi.org/10.6342/NTU.2008.02462

摘要

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。

關鍵字

爪式轉子 ； 轉子引擎 ； 參數化實體模型 ； 共軛曲線

並列摘要

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.

並列關鍵字

Claw rotors ； rotary engine ； parametric modeling ； conjugate curves

參考文獻

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