The Effect of Water Contents of POE on Scuffing Characteristics

摘要

The conditions, required for applying POE to refrigerating oil of rotary compressor using HFCs, were examined. It became clear that the vanes and pistons are more likely to scuff when the water content is high, however, the scuffing pressure of the sliding bearings is less likely to be affected by the water content. The use of POE with optimized extreme pressure additives and controlled water content ensures more excellent scuffing characteristics than that when a conventional refrigerating atmosphere or other refrigerating oils are used, and contributes to the reduction of sludge. Therefore, rotary compressors using POE with optimized EPAs and controlled water content are reliably manufactured.