Study on vibration of reciprocating pump pipelines

Due to the periodic movement of the piston in the reciprocating pump, the fluid will cause 8 pressure pulsation, and the vibration of the pipeline will lead to instrument distortion, pipe failure 9 and equipment damage. Therefore, it is necessary to study the vibration phenomena of the 10 reciprocating pump pipeline based on the pressure pulsation theory. This paper starts from the 11 reciprocating pump pipe pressure pulsation caused by fluid, pressure pulsation in the pipeline and 12 the excited force is calculated under the action of the reciprocating pump. Then, the numerical 13 simulation model is established based on the pipe beam model, and the rationality of the numerical 14 simulation method is verified by the indoor experiment. Finally, a case study is taken as an example 15 to analyze the vibration law of the pipeline system, and proposed the stress reduction and vibration 16 reduction measures. The main conclusions are drawn from the analysis: (1) Excited force is 17 produced in the bend or tee joint, and it can also influence the straight pipe in different levels; (2) In 18 this pipeline system, the pump discharge pipe has a larger vibration amplitude and lower natural 19 frequency; (3) The vibration amplitude increases with the pipe thermal stress, and when the oil 20 temperature is higher than 85°C, it had a greater influence on the vertical vibration amplitude of the 21 pipe. 22