衬套参数对柱塞泵柱塞副油膜特性的影响分析

朱希玲; 张玉华

doi:10.12299/jsues.23-0175

衬套参数对柱塞泵柱塞副油膜特性的影响分析

doi: 10.12299/jsues.23-0175

朱希玲^1,,
张玉华²

1.
上海工程技术大学, 机械与汽车工程学院, 上海 201620
2.
强生(中国)医疗器材有限公司, 上海 200245

详细信息

作者简介:
朱希玲（1977−），女，讲师，硕士，研究方向为流体力学和液压元件研究。E-mail：zhuxiling@sues.edu.cn

中图分类号: TH137.51
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- PDF下载量: 418
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-04
- 刊出日期: 2024-03-30

Influence analysis of parameters of bushing on oil film characteristics of piston/bushing interface in hydraulic piston pump

ZHU Xiling^1
,,
ZHANG Yuhua²

1.
School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
2.
Johnson & Johnson Medical (China) Ltd., Shanghai 200245, China

摘要

摘要: 为改善液压柱塞泵中柱塞副的磨损状况，建立流固耦合模型，求解流体域与固体域的相互作用。考虑柱塞变形和缸体孔衬套变形，讨论不同弹性模量的铜合金衬套材料和不同厚度的衬套对衬套变形和油膜厚度的影响。结果表明，衬套变形值随衬套材料弹性模量增加而减小，采用弹性模量小的铜合金衬套材料或适当增加衬套厚度能使油膜厚度增大，可以改善柱塞副润滑条件，延长柱塞泵的使用寿命。不同弹性模量的铜合金衬套材料和不同厚度的衬套对油膜厚度影响明显。研究结果为柱塞泵的优化设计提供一定的参考。
- 弹性变形 /
- 柱塞泵 /
- 流固耦合 /
- 衬套厚度
Abstract: To better the wear condition of the piston/bushing interface, the fluid-structure model was created, the interaction between fluid domain and solid domain was studied, the elastic deformations of the piston and bushing were considered, the impact of different thickness of bushing and material with different elastic moduli on the film thickness and deformations of bushing was discussed. The results show that the deformations of bushing decrease with increasing modulus of elasticity, bushing of copper lining materials with smaller elastic modulus or increasing of thicknesses of the bushing properly can improve lubrication conditions of the piston/bushing interface and the service life of the piston pump. Elastic deformations of piston and bushing have significant influences on the film thickness. The results provide a reference for the optimization design of the piston pumps.
- elastic deformations /
- piston pump /
- fluid-structure interaction /
- thickness of bushing

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图 1 柱塞副结构模型图

Figure 1. Structural model diagram of the piston/bushing interface

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图 2 计算域网格划分

Figure 2. Mesh of computational domain

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图 3 计算结果对比

Figure 3. Calculation results comparison with classical model

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图 4 开始排油时柱塞和衬套的变形图

Figure 4. Deformations of piston and bushing at the beginning of pressure phase

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图 5 排油结束时柱塞和衬套的变形图

Figure 5. Deformations of piston and bushing at the end of pressure phase

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图 6 材料1衬套变形图

Figure 6. Deformations of bushing with material 1

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图 7 材料2衬套变形图

Figure 7. Deformations of bushing with material 2

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图 8 不同厚度下衬套变形曲线

Figure 8. Deformation of bushing with different thickness

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图 9 材料2衬套变形图

Figure 9. Deformation of material 2bushing

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图 10 衬套材料1−油膜厚度沿轴向变化曲线

Figure 10. Curve of oil film thickness in the axial direction of bushing material 1

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图 11 衬套材料2−油膜厚度沿轴向变化曲线

Figure 11. Curve of oil film thickness in the axial direction of bushing material 2

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表 1 柱塞和衬套材料参数

Table 1. Material parameters of piston and bushing

材料参数	柱塞材料	衬套材料1	衬套材料2
弹性模量/Pa	2.1 × 10¹¹	1.1 × 10¹¹	0.9 × 10¹¹
泊松比	0.3	0.3	0.3
密度/ (kg∙m⁻³)	7.8 × 10³	8.9 × 10³	8.9 × 10³

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表 2 模型参数

Table 2. Parameters of model

参数	数值
柱塞半径r_p / mm	16
柱塞长度/ mm	100
柱塞副起始油膜长度L/ mm	60
柱塞副间隙c/ μm	0.03
常温下润滑油密度ρ/ (kg·m⁻³ )	850
油液动力黏度µ/ (Pa·s)	0.027
斜盘倾角β/ (°)	12
工作压力P₀ / MPa	50
斜盘转速n/ (r·min⁻¹)	3600

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