| 摘要(英) |
This thesis aims to develop and design a limacon slide-rotating plate gasoline rotary engine, which is smaller and lighter than the traditional reciprocating gasoline engine (size and weight are about one-fifth of the traditional reciprocating engine). The additional advantage of this engine is that it has four times power output per 720° (three times more than the reciprocating engine). Such a rotary engine is suitable to be used in military UAV engines or as a range-extender for electric vehicles. Based on our previous design of a limacon slide rotating plate rotary engine compression part (Yin-Li Chen, 2019), this research further manufactures the power part. Combining of the compression part with the power part, the dynamics testing of the limacon slide-rotating plate rotary engine is performed. We use an AC motor to adjust different speeds to measure engine displacement, pressure change, torque loss. Furthermore, we analyze the pressure and torque changes from different angles. The photoelectric sensor module is connected with the Arduino motherboard to read the rotation speed of a grating disk. And then we adjust the carburetor. A stoichiometric fuel to air equivalence ratio(ψ=1), where the fuel is the commercial unleaded gasoline 95. We let the fuel/air mixture compress into the power part, then we use a car spark plug to ignite the mixture for the ignition test. Unfortunately, the ignition test was unsuccessful. There are still several problems to be overcome before a successful engine operation could be achieved. The first problem is the friction problem of the slide-rotating plate. We need to develop a counter-balanced mechanism when the slide-rotating plate rotates, when the rotational speed increases, the centripetal force increases. Thus, the slide-rotating plate is excessively rubbing the rotor housing. It leads to the friction problem between the slide-rotating plate and the rotor housing, resulting in more torque needed in order to run the engine. For example, when the speed setting value is 150 rpm, it only requires 5 N•m of torque to run the engine, but the torque required to run 1050 rpm increased to 20 N•m. The other problem is the gas leakage problem. The gas leakage problem inside the rotor housing has been solved, but there is still an unresolved gas leakage problem between the compression part and the power part. Poor gas tightness problem can result in poor compression. The maximum compression pressure measured is 1.843 bar, which is only 31.2% of the design value of 5.9 bar. When the speed setting value is 450 to 900 rpm, the actual displacement of the power part exceeds the theoretical displacement of the power part. This means that there is gas leakage from the compression part to the power part. Because of the aforesaid two problems, the ignition test cannot be smoothly carried out. Although we cannot operate successfully the limacon slide-rotating plate gasoline rotary engine, we identify the problems to be solved. This will help us to develop an innovative rotary engine in the future. |
| 參考文獻 |
[1] 許右龍,轉子引擎動態氣封洩漏分析,國立中興大學機械工程學研究所碩士論文 (2015).
[2] http://www.ncsist.org.tw/csistdup/products/product.aspx?product_id=278&catalog=41
[3] 陳寅立,蚶線形滑轉板轉子引擎設計與實作,國立中央大學機械工程學研究所碩士論文 (2019).
[4] https://en.wikipedia.org/wiki/Wankel_engine.
[5] 馮俊宇,UAV Wankel燃油噴射式引擎之設計與製作,國立中興大學機械工程學研究所碩士論文 (2008).
[6] K. Yamamoto, Rotary Engine, Sankaido Publishing Co., Ltd., Tokyo, 1981.
[7] T. Sleiman, A.S. Laba, J.J. Laba, Rotary machine with roller controlled vanes, US Patent 8,336,518 (2012).
[8] N.T. Liu, Rotary internal combustion engine, US Patent 6,082,324 (2000).
[9] 周代翔,新型爪式轉子引擎之設計與分析,國立臺灣大學機械工程學研究所碩士論文 (2008).
[10] D.B. Wittry, Rotary engine with variable compression ratio, US Patent 5,433,179 (1995).
[11] R. Morgado, Internal Combustion Engine and Method, US Patent 6,739,307 (2007).
[12] https://medium.com/@timventura/the-high-output-massive-yet-tiny-swing-piston-engine
[13] G.R. Pennock, J.E. Beard, Force analysis of the apex seals in the Wankel rotary compressor including the influence of fluctuations in the crankshaft speed, Mechanism and Machine Theory 32 (1997) 349-361.
[14] J. Knoll, C. Vilmann, H. Schock, R. Stumpf, A dynamic analysis of rotary combustion engine seals, SAE Technical Paper 840035 (1984).
[15] S. Zhang, J. Liu, Y. Zhou, Effect of DLC coating on the friction power loss between apex seal and housing in small Wankel rotary engine, Tribology International 134 (2019) 365-371.
[16] T. Resch, C. Schweiger, G. Offner, Y. Miyauchi, Numerical Investigation in Rotor Motion and Elasto-Hydrodynamic Rotor Bearing Behavior of a Rotary Engine Using Flexible Multi-Body Dynamics, SAE Technical Paper 2007-01-1459 (2007).
[17] W. Chen, J. Pan, Y. Liu, B. Fan, H. Liu, P. Otchere, Numerical investigation of direct injection stratified charge combustion in a natural gas-diesel rotary engine, Applied Energy 233 (2019) 453-467.
[18] B. Fan, J. Pan, W. Yang, Y. Zhu, W. Chen, Effects of hydrogen blending mode on combustion process of a rotary engine fueled with natural gas/hydrogen blends, International Journal of Hydrogen Energy 41 (2016) 4039-4053.
[19] F. Amrouche, P. Erickson, S. Varnhagen, J. Park, An experimental analysis of hydrogen enrichment on combustion characteristics of a gasoline Wankel engine at full load and lean burn regime, International Journal of Hydrogen Energy 43 (2018) 19250-19259.
[20] F. Amrouche, P. Erickson, S. Varnhagen, J.W. Park, An experimental study of a hydrogen-enriched ethanol fueled Wankel rotary engine at ultra lean and full load conditions, Energy Conversion and Management 123 (2016) 174-184.
[21] T. Su, C. Ji, S. Wang, X. Cong, L. Shi, J. Yang, Investigation on combustion and emissions characteristics of a hydrogen-blended n-butanol rotary engine, International Journal of Hydrogen Energy 42 (2017) 26142-26151.
[22] 趙文敏,蚶線,科學月刊21 (1990) 557-560. |
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