왕복동식 압축기 피스톤의 역학적 거동특성

Abstract

Division of Mechanical System Engineering, Chonbuk National University(Received January 4, 2013 ; Revised February 28, 2013 ; Accepted March 3, 2013)Abstract − Refrigeration and air-conditioning compressors used in home appliances, including refrigerators andair conditioners, are typically hermetic-type reciprocating compressors. Because the shell is sealed by welding,it should be designed to have a semi-permanent life. The energy consumption of a hermetic-type reciprocatingcompressor is low, but because it operates continuously to maintain a constant temperature inside the refrigerator,it has a certain base load. In this type of compressor, the driving motor operates at a high speed (about 3,000- 3,600 rpm), which causes valve damage, friction, wear, and high-frequency noise. Many studies have been con-ducted to solve these problems. To enhance the reliability and efficiency of the reciprocating compressor, thedesign conditions and operating environment of journal bearings should be considered. Dynamic behavior anal-ysis should be carried out in terms of the discharge pressure. The results showed that the load (discharge pres-sure) increases in the forward lookup zone and decreases in the backward lookup zone. When the revolutionspeed is increased, the maximum load decreases in the region where the maximum load operates.Keywords −reciprocating compressor (왕복동식 압축기), dynamic behavior characteristics (역학적 거동특성),discharge pressure (토출 압력)