Simulation and Experimental Analysis of Pressure Pulsation Characteristics of Pump Source Fluid

Abstract

The output flow pulsation characteristics of the hydraulic pump due to the structural characteristics may cause pump source fluid pressure pulsation and even cause the equipment to vibrate, which will affect the life and working reliability of the equipment. Scholars have done a lot of theoretical and simulation analysis on the characteristics of fluid flow and pressure pulsation caused by the specific structure and structure of the plunger pump, but there are few comparisons and analyses of the simplified model of the plunger pump and the pressure pulsation characteristics with experiments. In this paper, AMESim software is utilized to establish a simplified model of one seven-plunger hydraulic pump, and simulate and analyze the pump source fluid pressure pulsation characteristics of different system load pressures at a constant speed. An experimental platform for testing pump fluid pressure pulsation was designed and built, and the actual measurement and simulation results of pump fluid pressure pulsation were compared and analyzed. The results show that the system simulation data is in good agreement with the measured data, which verifies the correctness of the simplified model of the plunger pump. At the same time, it is found that the fluid pressure pulsation of the pump source exhibits broadband and multi-harmonic characteristics. At a constant speed, as the load pressure of the hydraulic system increases, the pump source fluid pressure pulsation amplitude increases, the pressure pulsation rate decreases, and the impact on the fundamental frequency amplitude is the most significant. The research results can provide a theoretical basis for suppressing the pressure pulsation of the pump source fluid and reducing the vibration response of a hydraulic pipeline under the action of the pulsating harmonic excitation.

Research on the Error Calibration Method of Rheological Parameters of Rectangular Tubular Viscometer

“…If the diaphragm pump discharges the same fluid each time it does reciprocating work, it can be considered that the average flow rate of the pump is constant. However, in practice, due to the working principle of the diaphragm pump, its instantaneous flow rate is changing, and its flow state is mainly pulsating flow, which will bring strong interference to the measurement of differential pressure signal and seriously reduce the accuracy of the measurement of rheological parameters of water-based drilling fluid [11].…”

Study on High-Precision Tension Control Technology for a Cold-Rolling Pilot Mill with Hydraulic Tension

“…During the rolling process, the outlet of the hydraulic pump is directly connected with the ring side of the entry tension cylinder through pipelines, and constant tension control is achieved through the proportional relief valve. However, due to the impact of the high-frequency flow pulsation of the pump and the fluid inertia effect [8,9], the accuracy of tension control is limited. Furthermore, when used to control T H , the flow of the proportional relief valve includes the pump flow and the output flow from the entry-tension cylinder, which makes it necessary to designate a large nominal size (at least 10 mm) for the proportional relief valves.…”

Effects of pulsating fluid at nozzle inlet on the output characteristics of common and self‐excited oscillation nozzle

“…Ma et al 18 deduced the relationship equation between the displacement and velocity of the piston of the multiphase pump and used the computational fluid dynamics method to study the entire working cycle of the reciprocating multiphase pump, focusing on the effect of the lag angle on the pressure pulsation. In addition, AMESim software is utilized to establish a simplified model of the seven‐plunger hydraulic pump, and the pump source fluid pressure pulsation characteristics of different system load pressures at a constant speed are simulated and analyzed 19 …”

“…In addition, AMESim software is utilized to establish a simplified model of the sevenplunger hydraulic pump, and the pump source fluid pressure pulsation characteristics of different system load pressures at a constant speed are simulated and analyzed. 19 In contrast, when studying the flow of pulsating fluid in pipelines, scholars have focused on the influence of pulsating fluid on the vibration characteristics [20][21][22] and sealing performance 23 of the pipeline, the effect of temperature on the pulsation characteristics of the pipeline, 24 and the hydraulic pulsation attenuator. 19 However, few researchers have considered the effect of the pipes on fluid flow.…”

“…19 In contrast, when studying the flow of pulsating fluid in pipelines, scholars have focused on the influence of pulsating fluid on the vibration characteristics [20][21][22] and sealing performance 23 of the pipeline, the effect of temperature on the pulsation characteristics of the pipeline, 24 and the hydraulic pulsation attenuator. 19 However, few researchers have considered the effect of the pipes on fluid flow.…”