I’m seeking advice from everyone – are there any good methods for dealing with pipeline vibration in reciprocating pumps?
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I went to the site for an inspection today and found vibration in the inlet and outlet pipes of the compressor; the same issue of compressor pipe vibration was observed in other factory sites as well. Our usual approach is to secure the pipeline to prevent it from vibrating, by using supports and shims. But I always feel that this isn’t the best method. I was wondering if anyone has other methods or ideas that we could discuss.
When the pump is in operation, the pipes that are rigidly connected to it also move. If you don’t want to move it, use expansion joints, hoses, or similar things for connection. @Dawn bellows
There are two reasons for the vibration: one is resonance with the pipes caused by pulses generated by the compressor, and this resonance can be eliminated by adding supports, pipe hangers, and counterweights. Secondly, there are pulse vibrations caused by the medium inside the reciprocating machine; adding support can reduce these vibrations, but this approach is not ideal, as local stresses in the pipelines can become quite high. Therefore, buffer tanks at the inlet and outlet areas are typically included in the design. Pulse analysis is also conducted in the design of inlet and outlet pipelines to determine the pipeline layout, the location of pipe supports, and the size of buffers. You can contact the manufacturer to get an updated estimate.
Is the outlet damper working properly?
I rarely see domestic units equipped with dampers; generally, inlet and outlet buffer tanks are used instead. I’m not sure about imported units. Under normal conditions, the vibration level is generally acceptable. .
It is mainly resonance with the pipes caused by compressor pulses; in this case, metal hoses or shock-absorbing bellows compensators are used (since metal hoses and bellows compensators have a high resistance to vibration fatigue, and they can also be used to prevent the transmission of forces). The vibration in the inlet and outlet ports of compressors and pumps, as well as in the piping of systems such as reactors and synthesis towers, can be controlled or reduced using metal hoses or wave compensators.
Vibration in the inlet and outlet piping of reciprocating compressors is generally caused by factors such as mechanical resonance of the pipes and resonance of internal air columns. Although manufacturers conduct calculations regarding acoustic pulsations and pipe vibration, these are theoretical estimates, and there are always certain deviations in practice. First, analyze what the excitation frequency of the compressor is and what the vibration frequency of the pipeline is It is mostly column resonance, with the vibration frequency being a multiple of the excitation frequency. The recommended treatment measures are as follows: First, increase the number of pipe supports and their stiffness, depending on the actual conditions on site. However, this has a significant effect on the mechanical resonance of pipes caused by insufficient support stiffness, while for vibrations resulting from air column resonance, it can only provide temporary relief rather than a permanent solution. Second, add vibration-damping orifice plates to the pipeline. For the calculation and design of vibration-damping orifice plates, please contact me; it’s difficult to go into detail here. This is the simplest, and the effect on air column resonance is also noticeable. Third is to increase the volume of the buffer tank, although this is generally difficult to achieve.
It's a good idea. Mark it.
The analysis is very reasonable; I’ve learned from it.