CAE Approach to the Development of Rotary Compressors

This paper describes the computer aided engineering (CAE) approach to in,estigate the vibration of rolling piston type rotary compressors in the design and analysis stages. At first, the optimum design procedure for the compressor and piping system is presented. Then ,a compressor data base used for a dynamic simulation of the royary compressors are carried out. Finally, a practical application of the CAE approach to the optimum design of the rotary compressor is considered. INTRODUCTION Rolling piston type hermetic compressors have been used widely for room air-conditioners and unitary air-conditioners, because of high efficiency and reliability ,small size ,and light weight. Howe,er ,exciting forces generated by the rotary compressors are sometimes co•parable to the con,entional reciprocating compressors. Because,the motor and the components are directly fixed to the hermetic housing in order to reduce the size and improve the productivity. This means that an unbalanced inertia force around the crankshaft directly transmits to the hermetic housing which Is suspended with three coiled springs. Thetefore,it is important task to design the piping system connected to the rotary co•pressor in view of low vibration. A general concept of the CAE approach to the ptptng system in outdoor units has been established at DAIKIN and has already been