轴向柱塞泵球形阀对的轴承机理研究

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Actuators Pub Date : 2024-04-15 DOI:10.3390/act13040147
Shunhai Xu, Chunxiao Zhao, Dian He, Nan Xu, Bin Zhang, Guofang Gong
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引用次数: 0

摘要

液压系统驱动刀头机构,实现大型隧道掘进设备的开挖,对泵源提出了高压、大流量的技术要求。传统的小排量轴向柱塞泵采用平面阀板。然而,在大流量、重负荷工况下,平面阀板结构容易因高压、高速(PV)值和压力冲击而产生不均匀磨损,最终影响系统的可靠性。本文对球形阀板机构的承载特性进行了仿真分析。使用计算流体动力学(CFD)方法构建了不同阀板油膜结构的流场模型,以计算其承载能力的差异。此外,还分析了基于球形阀板曲率半径的承载特性变化的原因。模拟结果表明,与传统的平面阀板相比,球形阀板具有更优越的泄漏和承载性能。此外,球形阀板的曲率半径会直接影响柱塞泵的脉动特性。曲率半径越小,油膜接触面积越大,油膜承载波动越大,而曲率半径越大,油膜泄漏越多。通过对重载、高排量轴向柱塞泵的模拟计算,确定了稳定承载的最佳曲率半径为 350 毫米。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on Bearing Mechanism of Spherical Valve Pairs of Axial Piston Pumps
The hydraulic system drives the cutter head mechanism to realize the excavation of large tunnel boring equipment, which puts forward the technical requirements of high pressure and large flow to the pump source. The traditional small displacement axial piston pump uses a planar valve plate. However, under high flow and heavy load conditions, the planar valve plate configuration is prone to uneven wear due to the high-pressure and -velocity (PV) value and pressure shock, which ultimately affects the reliability of the system. A simulation analysis of the load-bearing characteristics of the spherical valve plate mechanism is conducted. The Computational Fluid Dynamics (CFD) method was used to construct flow field models for different valve plate oil film structures to calculate differences in their load-bearing capacities. Additionally, the reasons for variations in load-bearing characteristics based on the curvature radius of the spherical valve plate were analyzed. The simulation results demonstrate that the spherical valve plate exhibits superior leak and load-bearing performance compared to the traditional flat valve plate. Furthermore, the curvature radius of the spherical valve plate directly affects the pulsation characteristics of the piston pump. Smaller curvature radii increase the contact area of the oil film, resulting in greater fluctuation in oil film load-bearing, whereas larger curvature radii lead to increased oil film leakage. Using simulation calculations on heavy-load, high-displacement axial piston pumps, it is determined that the optimal curvature radius for stable load-bearing is 350 mm.
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来源期刊
Actuators
Actuators Mathematics-Control and Optimization
CiteScore
3.90
自引率
15.40%
发文量
315
审稿时长
11 weeks
期刊介绍: Actuators (ISSN 2076-0825; CODEN: ACTUC3) is an international open access journal on the science and technology of actuators and control systems published quarterly online by MDPI.
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