Centrifugal compressor pipeline vibration problem

It can be changed to spring support, which can effectively reduce pipeline vibration and comply with design specifications. Determining the proper spring rate and damping is key. In addition, you can consider adding dampers, changing the pipeline layout, adding fixed points, using higher stiffness materials, readjusting the velocity and pressure of the fluid, wrapping the pipelines with vibration-absorbing materials, etc. A detailed analysis of the causes of vibration is required to select an appropriate solution. .

Regarding the vibration of the surge line, if you dare to ask, someone will probably answer. The key to the question is whether you dare to adopt it. It is better to be cautious about complex issues.

There is no fixed bracket in the picture above, only two false tube supports, which are rigid brackets.

First you have to find the source of the vibration, this is the main thing

In order to protect the impeller of many centrifugal compressors, the electrical control circuit should have vibration protection. When surge occurs and the vibration value exceeds the set value, it will automatically trip. To eliminate the fault of the centrifuge itself and the pipeline vibrating, you can install a corrugated expansion joint or change the sliding bracket. (You should be able to find the specifications in the forum). I have encountered two cases of surge in gas compressor pipes, which is outrageous. There is a pressurizing machine with an air intake cabinet that will experience periodic surges after running for about half a month. After the machine is shut down, the cause cannot be found. Later, because it was inconvenient to clear the focus, the outlet hand hole was shortened, and this phenomenon disappeared. :L There is also a furnace bottom fan, which also suffers from intermittent surges, much like a water seal trying to break. I checked many times and couldn't find the reason. Then it got better somehow. The reciprocating air compressor's body and outlet pipe vibrated so violently that the side walls were cracked. We went to the manufacturer but couldn't figure it out. Later, an equipment technician and an experienced craftsman dismantled and reassembled the machine and found out that one of the cross-head pins was short. Completely solved the problem.

Increasing support stiffness should improve

One direction of the spring may not necessarily solve all problems. It is estimated that the process load will increase and the flow rate will increase. If necessary, adjust the bracket settings and pipe diameter of the entire piping system.