☆ 4.6 Article

Modeling and Characteristic Analysis of a Cylinder Block/Valve Plate Interface Oil Film Model for 35 MPa Aviation Piston Pumps

MACHINES (2022)

Related references

Note: Only part of the references are listed.

Article Engineering, Multidisciplinary

Capped piston: A promising design to reduce compressibility effects, pressure ripple and cavitation for high-speed and high-pressure axial piston pumps

Qun Chao et al.

Summary: Increasing rotational speed and operating pressure can enhance the power density of axial piston pumps. Nevertheless, standard hollow pistons in axial piston pumps encounter issues like volumetric losses, pressure ripple, and cavitation at high rotational speeds and operating pressures. To mitigate these fluid-related problems, the capped piston design provides a promising alternative by minimizing dead volume. This study aims to elucidate the mechanism behind the improved flow characteristics of axial piston pumps with capped pistons. Computational fluid dynamics simulations demonstrate that capped pistons can notably diminish compressibility effects, pressure ripple, and cavitation across various operating conditions.

ALEXANDRIA ENGINEERING JOURNAL (2023)

Add to Collection

Article Engineering, Aerospace

Flow characteristics of integrated motor-pump assembly with phosphate ester medium for aerospace electro-hydrostatic actuators

Jiangao Zhao et al.

Summary: This paper investigates the design and flow characteristics of the motor-pump assembly, a core component of the Aerospace Electro-hydrostatic Actuator (EHA). A hierarchical modeling method is used to build relevant models, and a comparison and analysis of experimental and simulation results are conducted.

CHINESE JOURNAL OF AERONAUTICS (2023)

Add to Collection

Article Engineering, Multidisciplinary

Improving accuracy of cavitation severity recognition in axial piston pumps by denoising time-frequency images

Qun Chao et al.

Summary: In this paper, an intelligent method for recognizing the cavitation severity of an axial piston pump in a noisy environment is proposed. The experimental results demonstrate that the denoising method significantly improves the diagnostic performance of the CNN model.

MEASUREMENT SCIENCE AND TECHNOLOGY (2022)

Add to Collection

Article Engineering, Mechanical

Optimization of the outlet unloading structure to prevent gaseous cavitation in a high-pressure axial piston pump

Bin Zhang et al.

Summary: This study proposes a new method to reduce cavitation by changing the shape of unloading holes, which effectively redistributes the damaging power of cavitation. The crescent-shaped unloading hole design significantly improves the unloading rate and effectively decreases cavitation in the pump.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE (2022)

Add to Collection

Article Mathematics

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

Shiqi Xia et al.

Summary: This paper proposes a discharge pressure-based model and fault detection methodology for specific cavitation damage in axial piston pumps. The study investigates the effects of cavitation damage on discharge pressure and presents a method for detecting this damage.

MATHEMATICS (2022)

Add to Collection

Article Engineering, Mechanical

Derivation of the Reynolds equation in cylindrical coordinates applicable to the slipper/swash plate interface in axial piston pumps

Qun Chao

Summary: This paper derives a generalized Reynolds equation in cylindrical coordinates for the slipper/swash plate interface in axial piston pumps to account for the complex motion of slippers, evaluating boundary velocity conditions based on the kinematics of slippers. The new Reynolds equation considers geometric squeeze and centrifugal terms, along with a different form of Couette terms compared to traditional equations.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY (2021)

Add to Collection

Review Engineering, Aerospace

Review of cylinder block/valve plate interface in axial piston pumps: Theoretical models, experimental investigations, and optimal design

Jiang'ao Zhao et al.

Summary: Axial piston pumps are widely used in aircraft hydraulic systems, requiring high power density, safety, and reliability. This study comprehensively reviews the latest literature on the cylinder block/valve plate interface, including theoretical models, experimental studies, and structural optimization methods.

CHINESE JOURNAL OF AERONAUTICS (2021)

Add to Collection

Article Engineering, Mechanical

Experimental research on tribological characteristics of TiAlN coated valve plate in electro-hydrostatic actuator pumps

Jiangao Zhao et al.

Summary: Electro-hydrostatic actuators (EHA) demand high efficiency, high speed, and a wide range of speed from piston pumps, requiring the cylinder block/valve plate interface to function as both a bearing and a seal. By establishing friction coefficient equations and utilizing cermet coatings to improve friction performance, the study evaluated the wear status of TiAlN coated and nitrided valve plates. In a wide speed range of 500-10000 rpm, the TiAlN coated valve plate showed a decrease percentage of friction coefficient and a wear rate significantly lower than the nitrided one.

TRIBOLOGY INTERNATIONAL (2021)

Add to Collection

Article Engineering, Mechanical

Simulation and experimental investigation on low wear rate surface contour of piston/cylinder pair in an axial piston pump

Junhui Zhang et al.

Summary: The study demonstrates that optimizing the design of a pre-machined surface contour can reduce wear rate during the initial operating stage of the piston/cylinder pair, with the surface modification layer playing a crucial role in this process.

TRIBOLOGY INTERNATIONAL (2021)

Add to Collection

Article Automation & Control Systems

Analytical Harmonic Method for Modeling High-Frequency Oscillation With Applications to Aircraft Piston Pump Vibration Analysis

Lei Li et al.

Summary: Undesired oscillations in controlled systems can be effectively identified using the analytical harmonic model (AHM), which expresses oscillatory variables as harmonic kernel vectors and a position-independent harmonic amplitude vector. Experimental results on an aircraft pressure-controlled piston pump reveal that high-frequency SP oscillations are dominated by the fundamental harmonic component contributed by disturbance torque.

IEEE-ASME TRANSACTIONS ON MECHATRONICS (2021)

Add to Collection

Article Engineering, Aerospace

Numerical investigation of effect of a centrifugal boost impeller on suction performance of an aircraft hydraulic pump

Hongkang DONG et al.

Chinese Journal of Aeronautics (2021)

Add to Collection

Article Chemistry, Analytical

Active Pressure Ripple Reduction of a Self-Supplied Variable Displacement Pump with Notch Least Mean Square Filter

Xiaochen Huang et al.

Summary: The research demonstrates that reducing pressure pulsation in variable displacement axial piston pumps can be achieved through active control of the proportional valve, supporting miniaturization of the control system. Analysis using mathematical models and algorithms has proven the effectiveness of the active control technique. The comprehensive reaction of flow rate variations in different chambers contributes to changes in pressure pulsation.

MICROMACHINES (2021)

Add to Collection

Review Engineering, Aerospace

Hydraulic piston pump in civil aircraft: Current status, future directions and critical technologies

Shengrong Guo et al.

CHINESE JOURNAL OF AERONAUTICS (2020)

Add to Collection

Article Engineering, Mechanical

Analysis on micro-motion of cylinder block based on elasto-hydrodynamic lubrication

Jihai Jiang et al.

INDUSTRIAL LUBRICATION AND TRIBOLOGY (2020)

Add to Collection

Review Engineering, Mechanical

A Review of High-Speed Electro-Hydrostatic Actuator Pumps in Aerospace Applications: Challenges and Solutions

Qun Chao et al.

JOURNAL OF MECHANICAL DESIGN (2019)

Add to Collection

Article Nanoscience & Nanotechnology

Study on the effects of the textured surface to improve the performance of cylinder block/valve plate interfaces

Qibing Lv et al.

AIP ADVANCES (2019)

Add to Collection

Article Engineering, Mechanical

Multi-objective optimization of micron-scale surface textures for the cylinder/valve plate interface in axial piston pumps

Yuan Chen et al.

TRIBOLOGY INTERNATIONAL (2019)

Add to Collection

Article Engineering, Mechanical

Analysis of lubricating characteristics of valve plate pair of a piston pump

Zhaoqiang Wang et al.

TRIBOLOGY INTERNATIONAL (2018)

Add to Collection

Article Engineering, Mechanical

Effect of Surface Texturing Parameters on the Lubrication Characteristics of an Axial Piston Pump Valve Plate

Zhaoqiang Wang et al.

LUBRICANTS (2018)

Add to Collection

Article Engineering, Multidisciplinary

Thermal-fluid-structure coupling analysis for valve plate friction pair of axial piston pump in electrohydrostatic actuator (EHA) of aircraft

Yunhua Li et al.

APPLIED MATHEMATICAL MODELLING (2017)

Add to Collection

Article Engineering, Mechanical

POWER LOSS IN THE LUBRICATING GAP BETWEEN CYLINDER BLOCK AND VALVE PLATE OF SWASH PLATE TYPE AXIAL PISTON MACHINES

Monika Ivantysynova et al.

INTERNATIONAL JOURNAL OF FLUID POWER (2009)

Add to Collection

Article Automation & Control Systems

Pressure, flow, force, and torque between the barrel and port plate in an axial piston pump

J. M. Bergada et al.

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME (2008)

Add to Collection

Article Automation & Control Systems

Tipping the cylinder block of an axial-piston swash-plate type hydrostatic machine

ND Manring

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME (2000)

Add to Collection

© Peeref 2019-2024. All rights reserved.