초록 ▼

A turbomachine having variable-angle diffuser vanes operates by regulating the angle of the diffuser vanes on the basis of the sensors disposed on the pump body or pipes of a surge detection device. The onset of surge can be forecast by measuring the fluctuations in the operating parameter(s) over a

A turbomachine having variable-angle diffuser vanes operates by regulating the angle of the diffuser vanes on the basis of the sensors disposed on the pump body or pipes of a surge detection device. The onset of surge can be forecast by measuring the fluctuations in the operating parameter(s) over a measuring interval of time computed on the basis of the operating characteristics of the impeller of the turbomachine. The onset of surge is prevented by adjusting the angle of the diffuser vanes in accordance with the sampling duration for parameter fluctuations over the measuring interval of time, and by adjusting the diffuser vanes to maintain the operating parameter fluctuations of the fluid machinery below a threshold value of the turbomachine derived from the design flow rate of the turbomachine. Application of the surge detection device in combination with fluid flow guide vanes and blades of the turbomachine enables full utilization of the potential capability of the turbomachine.

대표청구항 ▼

A turbomachine having variable guide vanes comprising: an impeller for imparting energy to a fluid medium and forwarding an energized fluid to a diffuser; diffuser vanes provided on said diffuser for enabling alteration of an operating angle of said diffuser vanes; an operating parameter monitoring

A turbomachine having variable guide vanes comprising: an impeller for imparting energy to a fluid medium and forwarding an energized fluid to a diffuser; diffuser vanes provided on said diffuser for enabling alteration of an operating angle of said diffuser vanes; an operating parameter monitoring device disposed on a turbomachine for measuring fluctuations in an operating parameter; a computing processor for determining fluctuations in said operating parameter by computing fluctuations in said operating parameter determined by said operating parameter monitoring device over a measuring interval of time, and comparing computer fluctuations with a predetermined threshold value; and a vane angle control device for regulating said operating angle for altering said operating angle of said diffuser vanes so that said computed fluctuations do not exceed said predetermined threshold value.