In order to ensure the safe use of the heat exchanger and the safe production of the device, it must be operated at a smooth operating pressure. However, the pressure pulsation of the reciprocating superhigh pressure compressor causes excessive vibration of the heat exchanger, which threatens the safe production of the device. Analyze the vibration causes of a high-pressure heat exchanger in a high-pressure device, and accordingly develop corresponding vibration-absorbing measures to perform effective vibration-absorbing treatment to ensure the safe and stable operation of the equipment. The cooling water in the outer casing is cracked and leaked across the tee of the pipe. Although it has been repaired several times, it is cracked in the original place. In this year's major overhaul, the vibration of the three-wire heat exchanger was still large after it was installed. We analyzed the causes of vibration together with Tsinghua University and Sinopec Beijing Design Institute and formulated corresponding vibration reduction measures. An ultra-high pressure heat exchanger is proposed as a casing-type heat exchanger. Due to its special role in the device, its work directly affects the normal production of the high-pressure device. For ultra-high pressure pipelines, the allowable values ​​of pressure unevenness have not yet been quoted at home and abroad, citing the standards proposed by the former Soviet Leningrad Institute of Chemical Machinery for pressure unevenness of large-scale opposed reciprocating compressors, but this The standard is only applicable to medium and low voltage and high pressure systems. For ultra high pressure systems, it is for reference only. The allowable stress unevenness may be a larger value than a lighter gas or a hydrogen-containing mixed gas. According to the site investigation, the main skeleton of the heat exchanger has sufficient rigidity and vibration, so the vibration of the elbow is the result of lack of support itself. Pressure pulsating gas vibration and structural vibration analysis to evaluate pressure pulsation analysis and evaluation Due to the intermittent nature of the reciprocating compressor suction and exhaust, the pressure and velocity of the airflow in the pipeline are unstable, which is commonly referred to as pressure pulsation. The vibration of the pipeline is mainly caused by the pulsation of the airflow. The excitation force applied to the pipeline due to the pulsation of the airflow can be considered as the result of the combined action of the pressure pulsation and the velocity pulsation, but the pressure pulsation accounts for the above. Therefore, the analysis of the pressure pulsation is crucial. . The degree of pressure pulsation is usually characterized by pressure non-uniformity, which reflects the relative ratio of the maximum pressure change of the gas in the tube to the average pressure during operation of the compressor. The calculation uses a numerical method that combines the one-dimensional non-convective theory with the uniform correction theory. After obtaining the relevant structural parameters of the compressor, the operating parameters of the gas and the structural parameters of the pipeline, the pressure unevenness of each part in the pipe can be obtained by computer solution. The calculation of pressure pulsation can be seen through the above calculation results through the calculation software developed by Sinopec Beijing Design Institute. The pressure pulsation of the compressor outlet is the largest, and the pressure pulsation is gradually attenuated with the extension of the pipeline. Due to problems in the design of the pressure piping and the lack of cushioning equipment, the value of the pressure unevenness is very large, far exceeding the standard in the table, and even if it is far from the exit, there is still a large pressure pulsation. Analysis of gas frequency characteristics Since the gas in the tube is a system and has its own inherent characteristics, when the excitation frequency of the compressor coincides with the natural frequency of the gas, the gas will resonate, causing a large pressure pulsation. The intrinsic properties of gas are mainly characterized by its natural frequency and pressure mode. It can be solved by wavelet theory and transfer matrix method. After obtaining the natural frequency and vibration mode, it can be judged whether the gas in the tube is in resonance state, so as to develop effective countermeasures. The calculation of the inherent characteristics of the gas in the pipe was completed by the calculation software developed by Sinopec Beijing Design Institute. The calculation results of the natural gas frequency of the pipeline to which the heat exchanger belongs are shown in the table. The natural frequencies of each pipeline are dense and the fundamental frequency is low. This is mainly due to the lack of buffering of the pipeline. The safety meter gas natural frequency calculation result excitation frequency is. The natural frequency of the pipeline gas to which the order station belongs is expressed by the natural frequency with the natural frequency, and the excitation frequency is very close to the tank and the pipe diameter is too small. It can also be seen from the calculation results that the natural frequency is very close to the excitation frequency, resulting in gas resonance, which is one of the reasons for the large pressure pulsation. It can be seen from the gas pressure mode of each order resonance frequency that the place with the largest amplitude occurs at the entrance of one, which causes a large vibration. The structural modal analysis pipeline is a continuous elastomeric structure that, like the gas inside the pipe, has its inherent dynamic characteristics, namely the natural frequency and vibration mode of the structure. When the excitation frequency of the compressor coincides with the natural frequency of the pipe, it can cause structural resonance and cause a large mechanical vibration response. The natural frequency and vibration mode of the structure can be calculated by the finite element method. After obtaining the natural frequencies and modalities of the pipelines, it is possible to judge whether structural resonance occurs, and then formulate corresponding countermeasures. The dynamic characteristics of the pipeline structure are analyzed. The computer program is completed. 3D Printing,Custom Stereolithography,Custom 3D Printing,3D Print Services Suzhou FCE precision electronics Co., LTD , https://www.sjfukeyifcesz.com