DEVICE TO PROTECT GAS TURBINE UNIT AGAINST SURGE Russian patent published in 2009 - IPC F04D27/02 

FIELD: engines and pumps.

SUBSTANCE: proposed device is intended for control over aircraft gas turbine units designed to reveal and prevent compressor surge. To this end, the device is used comprising pickup to measure air pressure P₂ behind the compressor and pickup to measure compressor inlet air pressure P₁. It comprises also first functional converter, divider and first threshold device incorporating additionally pickup of air temperature behind compressor T₂ and second functional converter, adder, second multiplier and second threshold device, all connected in series. Proposed device incorporates also first multiplier and integrator with its output connected with input of first threshold device and its input connected to output of divider. Note that first output of pickup to measure air pressure P₂ behind the compressor is connected to second input of second multiplier. Output of pickup to measure air pressure P₂ behind the compressor is connected with first input of first multiplier with its first output connected with first input of the divider and second input connected with second output of pickup of air temperature behind compressor T₂. output of first functional converter is connected with second input of the adder.

EFFECT: higher reliability and accuracy of revealing turbine surge.

1 dwg