What should be done after surge occurs in the centrifugal compressor? The theoretical basis of the treatment measures is, please give me the answer.

I am a copycat, so I will try to explain it for reference. First of all, the basis for the surge of a centrifugal compressor is that the outlet pressure is greater than the maximum capacity of the impeller. Moreover, the compression elasticity factor of the air causes the higher part of the pressure to be discharged into the atmosphere along the impeller flow channel. When the outlet pressure expands, the pressure is lower than the capacity of the impeller. The centrifugal force of the impeller compresses the gas again and again, forming periodic vibrations. The solution is to ensure that the outlet pressure must be maintained at the "design pressure" condition. The so-called design pressure is the theoretical basis you need. I don't know if I can explain your problem, it's just for reference. Oh, I'm not a master, I'm not a master of dancing, I'm just participating in the fun: lol

Thank you for sharing. In normal operation, the pressure cannot be lower than a certain level, but what should we do if the compressor surges when the pressure is lower than a certain level?

When the centrifuge detects surge, it will automatically unload and vent, and then load again. If it happens again, the volute and gearbox need to be dismantled. By the way, check the vibration probe and cables!

The centrifugal fan will surge if the flow rate is small enough to a certain extent. If it can be vented, add a vent at the fan outlet. If it cannot be vented, take a pipe from the outlet to the inlet.

When looking at the centrifuge's anti-surge, it is usually adjusted to reverse flight or open to empty. My analysis is to see which indicator exceeds during surge, and whichever overshoots will be fine. Ha ha

lCentrifuge surge treatment: 1. Increase the unit speed ； 2. Reduce the outlet pressure. 3. Turn on the anti-flight. There is no other basis for processing.: Reduce pressure ratio

The Design Institute reminds you: 1. Reduce the unit speed 2. Reduce the pipe network pressure 3. Turn on anti-surge The ultimate reason for surge is rotational stall, that is, the speed of the gas cannot keep up with the speed of the impeller. This leads to a reduction in the work done by the impeller on the gas, that is, the compressor outlet pressure decreases and is less than the pipe network pressure, so the pipe network pressure backflows. After the backflow, the gas in the compressor increases, the gas speed keeps up with the impeller speed, and the compressor can exhaust air again. Once the air is exhausted, the gas decreases again, which leads to rotational stall. Repeatedly, the gas flows back for a while, and the gas is evacuated for a while. This is called surge. Therefore, surge occurs and what must be overcome is the rotational stall. How to Overcome a Spinal Stall. 1. Increase the inlet gas volume so that the gas speed keeps up with the impeller speed. That is to turn on anti-surge. 2. Reduce the pressure of the pipe network so that the compressor can discharge air normally and prevent backflow. That is to say, venting 3 reduces the speed, so that the impeller speed decreases, so that the gas speed can keep up. That is to say, reduce the rotational speed. People who have not done in-depth research will not understand my answer. However, it is worth noting that the response to lowering the speed is slower and the speed cannot be reduced quickly, so it is rarely used.