초록 ▼

An arrangement for protecting a turbocompressor against surges by blowing off through a blow-off valve, in which at least the flow-through of the compressor and the compressor outlet pressure are measured. A regulating parameter is determined from the measured results, as well as from predetermined

An arrangement for protecting a turbocompressor against surges by blowing off through a blow-off valve, in which at least the flow-through of the compressor and the compressor outlet pressure are measured. A regulating parameter is determined from the measured results, as well as from predetermined reference values. A blow-off valve is adjusted dependent on the regulating parameter, by a surge-limit regulator through activating device with a downstream state regulator and a compressed medium. The blow-off valve is shifted in opening direction at a maximum rate of adjustment by safety controls when the regulating parameter exceeds a safe threshold. The compressed medium that activates the blow-off valve bypasses the state regulator and escapes directly when the safety controls engage. The compressed medium is prevented from escaping, on the other hand, when the safety controls disengage, and regulation is resumed only by the surge-limit regulator and the downstream state regulator.

대표청구항 ▼

A method for protecting a turbocompressor against surges by blowing off through a blow-off valve, comprising the steps: measuring at least flow through the compressor and the compressor outlet pressure; determining a regulating parameter from said measuring step and predetermined reference values; a

A method for protecting a turbocompressor against surges by blowing off through a blow-off valve, comprising the steps: measuring at least flow through the compressor and the compressor outlet pressure; determining a regulating parameter from said measuring step and predetermined reference values; adjusting the state of the blow-off valve dependent on said parameter by a surge-limit regulator through activating means with a downstream state regulator by a compressed medium; shifting said blow-off valve in opening direction at a maximum rate of adjustment by safety controls when said regulating parameter exceeds a safe threshold; said compressed medium that activates said blow-off valve bypassing said state regulator and escaping directly when said safety controls engage; preventing said compressed medium from escaping when said safety controls disengage, and resuming regulation only by said surge-limit regulator and said downstream state regulator, so that the blow-off valve is adjusted in a rapid-opening procedure at its maximum rate of adjustment independent of said state regulator and improper blow-off of compressed medium is prevented.