Friction-Excited Oscillation of Air Conditioner Rotary Compressors: Measurements and Numerical Simulations

Vibration Analysis of Rotary Compressors

By theoretically analyzing dynamic behavior of the crankshaft, the rolling piston and the blade inrolling-piston rotary compressors, constraint forces and sliding speed at each pair of movable machine elements were obtained, and unbalanced inertia forces and compressor vibrations were evaluated. It was concluded that theoretical results have a goodagreement with experimental ones. Moreover, it ...

The Development Of High Efficiency Air Conditioner With Two Compressors Of Different Capacities

An air-conditioner driven by two compressors with different capacity was developed to improve energy efficiency by use high efficiency components and load matching. An algorithm for driving the two-compressor system was devised for optimum capacity modulation, and seasonal energy efficiency increased by 22%, when compared with that of a conventional air-conditioner of the same rated cooling cap...

Rolling Piston Type Rotary Compressors with Special Attention to Friction and Leakage

Selection of Friction Materials Used in Compact, High Performance Inverter Controlled Rotary Compressors

T. IIZUKA and K. IKEDA Tochigi Works Hitachi, Ltd. Shimotsuga-gun, Tochigi-ken, Japan, 329-44 Since applications of rotary compressors driven by inverter motors have become more widespread, l~bricating problems with the sliding parts have been appearing. The sliding parts require sufficient antiseizure and wear-resistant properties under the boundary lubricating conditions. The authors have dev...

Vibration-Acoustics Study of R410A Rotary Compressors

This paper demonstrates a typical process to investigate the vibro-acoustic behavior of R410A rotary compressors. The compressor shell is usually the main noise radiator in a rotary compressor. However, the accumulator shell can be a significant noise source as well, although its size is relatively small. Sound performance of a rotary compressor is affected not only by the dynamic characteristi...