CENTRIFUGAL COMPRESSOR Russian patent published in 1998 - IPC

FIELD: mechanical engineering; compressors. SUBSTANCE: turnable ring 6 with circular row of holes 7 is installed in chamber 3. Ring precludes flow of gas from chamber 3 into bladeless diffuser 2 in working zone of performance curve and connects spaces of chamber 3 and diffuser 2 at stable operation limit. Turning of ring 6 is carried out by signal of pickup recording the beginning of fluctuations at stables operation limit. EFFECT: provision of surgeless operation at different speeds and different delivery pressures. 4 dwg