COMPRESSOR ANTISURGE PROTECTION Russian patent published in 2012 - IPC F04D27/02 

FIELD: machine building.

SUBSTANCE: proposed method comprises defining compressor flow rate variation speed or pressure difference variation rate at confuser and compressor rotor rpm acceleration. In case compressor rotor rpm acceleration ω_c exceeds preset ω_c-crit or compressor flow rate drop Q with inverse signal exceeds preset Q_crit, signal PRESURGE is generated to start count of said signal holding time. In case during said time another signal PRESURGE is generated, holding time is restarted. In case after termination of signal holding time count, count time is not counted to the end, signal SURGE is generated. Note here that signal SURGE may be generated if the number of n_nn occurrences of signal PRESURGE during preset time t_n after occurrence of first signal PRESURGE exceeds critical n_{nn_crit}.

EFFECT: reliable identification of surge at start of its origination.

2 cl, 3 dwg