Theory and Experimental Analysis of the Machining Profile of a Piston Ring with Non-uniform Pressure Distribution inside Cylinder

• Main Authors: Kun Hung Hsieh, 謝坤宏
• Other Authors: C. C. Ling
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/84785968298855020135

碩士 === 國立中正大學 === 機械系 === 87 === A piston ring and piston assembly is commonly used in reciprocating engines and air compressors in order to prevent the high pressure gas in the cylinder chamber from leaking into the crankcase area. The design of the free shape of piston ring will effect the performance of the engines or air compressors. Insufficient design of the free shape of the piston ring will produce the high pressure air emissions, and effect the lubrication condition between piston ring and cylinder. It will produce the noise, vibration, the temperature rising, and the wear of piston rings. So the design of the free shape of the piston ring is the most important. However, there are many different design requirements in different engines, for example, like the consideration of material choice and surface coatings, the section of piston ring, and the pressure distribution , etc. The most difficult aspect of these investigations is how to create a proper unloaded or free ring shape that will lead to different contact pressure distribution. This research focus on the design of the free ring shape which is load by different and non-uniform pressure distribution by using the Bernoulli-Euler theory and use the finite elements and experimental methods to prove this formulation.