Hydraulic axial plunger pump: gaseous and vaporous cavitation characteristics and optimization method

Suo, Xiaoyu; Jiang, Yi; Wang, Wenjie

doi:10.1080/19942060.2021.1913232

Cited by 12 publications

(6 citation statements)

References 25 publications

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“…At present, plunger grouting pumps are mainly used in grouting projects, and their basic motion is driven by crankshaft rotation to complete the reciprocating motion of the plunger in the cylinder. However, the reciprocating motion of the plunger results in a moment of inertia and imbalance of the inertial force, which causes an increase in the inertial load on the support members of the plunger pump structure [6][7][8][9]. The plunger produces different degrees of cyclic pressure per stroke, and the grouting pressure and flow are difficult to control, with pressure fluctuations ranging from a few to more than a dozen megapascals.…”

Section: Introductionmentioning

confidence: 99%

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Wang²,

Zhang

et al. 2023

Preprint

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In underground engineering disaster management, existing grouting devices are mainly plunger pumps with large output pulses, which easily cause secondary damage to the surrounding rock of tunnels. Using a rotary piston Wankel pump, an intelligent dual-liquid grouting automation control system (SDUZJ) was developed based on the Fuzzy-PID composite control method to achieve steady output pressure control. Fuzzy control was used when the target and current pressure difference was large to improve self-adaptability and response time. Conversely, PID controller was used when the difference was small to eliminate static differences for steady-state regulation. Combined with the human–computer interaction interface of the computer, automatic control of dual-liquid grouting, alarm recording, real-time monitoring curve, system data setting, and historical data query were realized. A constant-pressure fracturing grouting model experiment with three-axis stress was performed using the proposed system. The Fuzzy control mode was selected to rapidly increase the grouting pressure and flow (pressurization stage) and adjust the grouting pressure to the target value (fracture initiation stage) through rapid rotation of the stepper motor. In the pressure stabilization and fracturing expansion stage, the PID control mode was used for grouting pressure and flow stabilization. Therefore, the Fuzzy-PID pressure stabilization grouting control was realized.

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Section: Introductionmentioning

confidence: 99%

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Wang²,

Zhang

et al. 2023

Preprint

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show abstract

“…While the vapour cavitation is accompanied by the phase change between liquid and gas phases, gas cavitation is associated with diffusion processes in the liquid [2,11]. Liquids are affected by both processes [6][7][8][9], and both significantly affect the hydraulic mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Flow Through Throttle Valve During Gaseous Cavitation

et al. 2022

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The multiphase flow in oil hydraulic systems has a very significant effect on the correct operation of the hydraulic system. Air can be found in various states in hydraulic systems, while free entrained air in the form of bubbles has the potential to be the most problematic. It especially affects the compressibility of the hydraulic liquid resulting in reduced stiffness of the hydraulic system. The actuators of the hydraulic mechanisms then do not achieve the fast response and the precision of movements depending on the input control signals. One possibility for the contamination of hydraulic fluid by air bubbles is through a phenomenon known as gaseous cavitation. This is a phenomenon in which gas is released when the pressure drops below the saturation pressure of the dissolved gas in the liquid. This article focuses on the experimental analysis of the flow through the throttle valve which is affected by the formation of air bubbles at the throttle edge of the valve. The regions of gaseous cavitation were observed at the different flow cross-section of the throttle valve. The throttle valve was placed into the block of transparent material to provide visualization of the individual measurements. The article is supplemented with photographs of the individual measurements showing the gaseous cavitation inception. Research background: flow cross-section, cavitation phenomenon, discharge coefficient. Purpose of the article: Effect of flow cross-section size and flow velocity on cavitation development. Methods: Experimental measurements. Findings & Value added: The investigation of the gaseous cavitation inception, Visualization of the individual measurements.

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“…17,18 Suo et al proposed a full cavitation model and compressibility model to simulate the influence of cavitation on the flow rate of the piston pump. 19 Gullapalli et al used an experiment to study the influence of oil gas content on flow loss and noise of the piston pump, the results showed that the volume efficiency of the piston pump decreased, the mechanical efficiency increased slightly, and the overall efficiency decreased with the increase of gas content. 20 Vacca et al analyzed the influence of cavitation on the effective flow rate of swash-plate piston pumps based on compressible flow models.…”

Section: Introductionmentioning

confidence: 99%

Prediction approach of compression loss in bent-axis piston pump with cavitation

Qing

Yang

et al. 2022

Advances in Mechanical Engineering

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Compression loss is one of the volumetric losses of bent-axis piston pumps, and its accurate evaluation is the basis for predicting the effective flow rate and volumetric efficiency of bent-axis piston pumps. The effect of changes in gas content on the effective bulk modulus rarely is considered in the existing compression loss models, which does not apply to the compression loss of bent-axis piston pumps under cavitation. However, cavitation exists in the actual work, especially in increasing the speed of the bent-axis piston pump. To solve this problem, a compression loss model is proposed. Firstly, the modified Henry’s law and the simplified transport equations of gas are used to describe the oil gas content under cavitation, and the effective bulk modulus equation is established. Then, combined with the definition of compressibility, the compression loss model of the bent-axis piston pump is proposed. Finally, the compression loss of the bent-axis piston pump under different operating conditions is analyzed through simulation, and the results are verified by experiment. The results show that the model prediction results are a good agreement with the experimental results under different operating conditions. The conclusions provide a new method for evaluating the effective flow rate and volumetric efficiency in the bent-axis piston pump.

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Hydraulic axial plunger pump: gaseous and vaporous cavitation characteristics and optimization method

Cited by 12 publications

References 25 publications

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Experimental Analysis of Flow Through Throttle Valve During Gaseous Cavitation

Prediction approach of compression loss in bent-axis piston pump with cavitation

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