Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston pump design

Chao, Qun; Tao, Jianfeng; Lei, Jiehao; Wei, Xiaoliang; Liu, Chengliang; Wang, Yuanhang; Meng, Linghui

doi:10.1007/s11465-020-0616-0

Cited by 15 publications

(11 citation statements)

References 23 publications

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Section: Machine Descriptionmentioning

confidence: 99%

“…Compared with other application fields, the aerospace applications require the axial piston pump to operate at high rotational speed and over a wide temperature range. High-speed rotation improves the power density (also known as power to weight ratio) of the hydraulic system 1,2 because it can not only scale down the pump, 3 but also eliminate the need of bulky reduction gearing between the prime mover and the pump. The normal speed of the aviation axial piston pump is usually more than 10000 r/min and the maximum speed can even reach 22500 r/min.…”

Section: Introductionmentioning

confidence: 99%

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Cavitation in a high-speed aviation axial piston pump over a wide range of fluid temperatures

Chao

Tao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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The axial piston pump in aerospace applications needs to operate over a wide range of fluid temperatures from −54°C to 135 °C. The fluid properties at such extreme temperatures will significantly affect the cavitation that is one of the major limiting factors for the efficiency and reliability of aviation axial piston pumps. However, it appears that very little of the existing literature studies the effects of extreme fluid temperatures on the pump cavitation. This paper aims to examine the temperature effects on the cavitation in an aviation axial piston pump. First, we develop a three-dimensional (3D) transient computational fluid dynamics (CFD) model to investigate the pump cavitation and validate it experimentally. Second, we use the validated CFD model to investigate the temperature effects on the pump cavitation by changing the fluid properties including viscosity, density, and bulk modulus. The numerical results show that low fluid temperature makes the aviation axial piston pump suffer serious cavitation due to high viscosity, leading to delivery flow breakdown, unacceptable pressure pulsation, and delayed pressure built up. In contrast, high fluid temperatures have minor effects on the cavitation although they increase the pressure pulsation and built-up time slightly.

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Section: Machine Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cavitation in a high-speed aviation axial piston pump over a wide range of fluid temperatures

Chao

Tao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

Self Cite

View full text Add to dashboard Cite

show abstract

“…The vapor cavitation [25] based CFD model is presented to identify the critical inlet pressure [26]. Apart from the CFD model, an analytical cavitation model is used to determine the pump's speed limitations [27].…”

Section: Introductionmentioning

confidence: 99%

Modelling and Fault Detection for Specific Cavitation Damage Based on the Discharge Pressure of Axial Piston Pumps

Xia

Xiang

2022

Mathematics

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Cavitation will increase the leakage and discharge pressure fluctuation of axial piston pumps. In particular, specific cavitation damage may aggravate the pressure impact and performance degradation. The influence of the specific cavitation damage on the discharge pressure is unclear, and the need for fault detection of this damage is urgent. In this paper, we propose a discharge pressure-based model and fault detection methodology for the specific cavitation damage of axial piston pumps. The discharge pressure model with specific damage is constructed using a slender hole. The simulation model is solved through numerical integration. Experimental investigation of cavitation damage detection is carried out. Discharge pressure features in the time domain and frequency domain are compared. The results show that waveform distortions, spectrum energy relocation, generation of new frequencies and sidebands can be used as features for fault detection regarding the specific cavitation damage of axial piston pumps.

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“…There are 8%-12% percent gas mixed in oil in hydraulic systems in general. The gas in the oil could cause cavitation, noise, vibration and damage to the hydraulic components and lead to reduction of the reliability, capacity and e ciency of the system [3,4]. As an auxiliary component, traditional hydraulic oil tank needs huge space to guarantee the degassing capacity, which renders the high potentiality of reduction and minimization.…”

Section: Introductionmentioning

confidence: 99%

Influence of Structural Parameters on Separation Performance of Gas-liquid Cyclone Separator for Hydraulic Oil Tank

Zhang

Chen

et al. 2022

Preprint

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Lightweight design of oil tank could improve the endurance, maneuverability and carrying capacity of mobile equipment. Cyclone separator is beneficial for the miniaturization and lightweight design of hydraulic tank due to high separation efficiency. Structural parameters are essential for separation performance. The influence of five key parameters was studied by the orthogonal experiment method. Three assessment indexes, gas-liquid separation efficiency γ, overflow split ratio β and effective split ratio α, of the separation performance of the flow separator were proposed. The best optimal structure in orthogonal experiment was selected for verification experiment. The overflow split ratio of the cyclone was 15.8% and the separation efficiency reached 95.95%. The influence of five parameters on three indexes basically has same trend. The study provides a reference for the structure design and separation performance evaluation of the gas-liquid cyclone separator.

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Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston pump design

Cited by 15 publications

References 23 publications

Cavitation in a high-speed aviation axial piston pump over a wide range of fluid temperatures

Cavitation in a high-speed aviation axial piston pump over a wide range of fluid temperatures

Modelling and Fault Detection for Specific Cavitation Damage Based on the Discharge Pressure of Axial Piston Pumps

Influence of Structural Parameters on Separation Performance of Gas-liquid Cyclone Separator for Hydraulic Oil Tank

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