Orifice plates and buffers reduce airflow pulsations and pipeline vibrations in reciprocating compressors
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Gas flow pulsation in reciprocating compressors and the resulting pipe vibrations are common problems during their operation. The book \"Gas Flow Pulsation and Pipe Vibration in Piston Compressors\" compiled by the Pipe Vibration Research Group of Xi’an Jiaotong University in 1984 mentions that methods for reducing pulsation and pipe vibrations include the use of orifices and buffers. An analysis of the mechanism behind this is provided in the article \"Mechanism Analysis of Orifice Reduction of Gas Flow Pulsation\" published in the second issue of the Journal of Xi’an Jiaotong University in 1979: when orifices and buffers are used together, with the orifices installed at the inlet and outlet of the buffer, the standing waves in the pipeline are transformed into traveling waves, thereby reducing pulsation and pipe vibrations. For compressors and pipelines under normal pressure, orifice plates and buffers are generally used in combination. However, through my research on the vibration problems in the pipelines of ultra-high-pressure ethylene compressors, I found that manufacturers of ethylene compressors operating at pressures as high as 300 MPa use only orifice plates in their pipelines. This is because such high pressures make it difficult to manufacture, install, and maintain buffers. Theoretically, however, even when orifice plates are used alone, standing waves still exist within the pipeline. It is difficult to provide a reasonable explanation as to whether orifice plates alone can reduce airflow fluctuations and pipeline vibrations. I wonder if researchers specializing in pulsation issues at reciprocating compressor manufacturers, as well as staff working in organizations that use such compressors, are aware of any other reasonable explanations I earnestly request guidance! Thank you so much!
The vibration of reciprocating compressors is very complex.
The last edit to this post was made by Zhongyuanren on 2020-12-12 at 00:53. The reasons for pipeline vibration in reciprocating compressors are: 1. Airflow pulsation; 2. Pipeline vibration. Solutions: 1. For airflow pulsation, use appropriate orifices and buffer tanks between stages with matching capacities； The intake and exhaust pressure control of the process system is stable ； 2. Pipeline vibration: Ensure proper fixation of the pipes ； The pipe clamp is securely in place ； Pipe clamps and pipeline fasteners are designed and installed in accordance with specifications ； Add spring brackets as appropriate. Sinopec Luoyang Engineering Company has extensive experience in piping work; it is recommended that the original poster get in touch with them.
Reducing the impact of pipeline pulsation is a complex computational process, and the use of orifices and buffers is just one method among others. Whether to install buffers and what size those buffers should be require calculations; it cannot be explained in just a few words.
Using an orifice plate alone can also reduce pulsations; it is cost-effective but the effect is limited.
Could you give me your contact number? 15049508944