电动静液作动器热力学建模方法及油液温升规律

王岩; 郭生荣; 杨乐

doi:10.13700/j.bh.1001-5965.2017.0622

电动静液作动器热力学建模方法及油液温升规律

doi: 10.13700/j.bh.1001-5965.2017.0622

王岩^1, ,,
郭生荣²,
杨乐²

1.
北京航空航天大学交通科学与工程学院, 北京 100083
2.
航空工业金城南京机电液压工程研究中心, 南京 211106

基金项目:

国家自然科学基金 51375029

国家自然科学基金 51775013

详细信息

作者简介:
王岩男, 博士, 副教授。主要研究方向:液压系统控制、数值模拟与热管理等

通讯作者:
王岩, E-mail: wybuaa@buaa.edu.cn

中图分类号: V245.1
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- 被引次数: 0
出版历程
- 收稿日期: 2017-10-10
- 录用日期: 2017-11-23
- 网络出版日期: 2018-08-20

A thermodynamic modeling method of electro-hydrostatic actuator and law of oil temperature rise

1.
School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
AVIC Jincheng Nanjing Engineering Institute of Aircraft System, Nanjing 211106, China

Funds:

National Natural Science Foundation of China 51375029

National Natural Science Foundation of China 51775013

More Information

Corresponding author: WANG Yan, E-mail: wybuaa@buaa.edu.cn

摘要

摘要:
电动静液作动器（EHA）是多电飞机关键子系统之一，其高度集成设计在减小体积和质量的同时，大幅降低换热能力，导致EHA油液温度过高、功能丧失。针对目前EHA一维热力学建模不足问题，以油冷电机驱动的EHA为研究对象，提出EHA的“三维+一维+三维”的热力学建模方法。首先，分析EHA能量转换及传递规律，探究EHA热能产生和扩散途径，在考虑参数时变基础上提出EHA的“三维+一维+三维”热力学建模方法；其次，基于ANSYS平台建立EHA电机生热和壳体对流换热的三维热力学模型；然后，建立柱塞泵、液压缸、阀和增压油箱等一维热力学模型；最后，在AMESim平台上搭建EHA的“三维+一维+三维”的热力学模型。仿真和实验验证了EHA的“三维+一维+三维”热力学建模方法的正确性，揭示了EHA油液温升规律，为EHA的热设计提供了理论依据。
- 电动静液作动器(EHA) /
- 热力学建模方法 /
- 电机 /
- 温升规律 /
- 柱塞泵
Abstract:
Electro-hydrostatic actuator (EHA), one of the key subsystems in the more electric aircraft, can reduce the size and weight of airborne equipment because of its highly compact design. However, the heat dissipation is weakened simultaneously, which can easily lead to an extremely rapid temperature increase and loss of function. In view of the drawbacks of traditional 1D thermal model, a "3D-1D-3D" thermal modeling method was proposed in order to research on the temperature rise of EHA driven by oil-cooled motor. Firstly, the conversion and transfer of energy in EHA were analyzed, aiming to find out the heat source and its diffusion. Further, the "3D-1D-3D" thermal modeling method was proposed considering that the parameters varied with time. Secondly, the 3D thermal model of EHA motor was established in ANSYS including the heat generation module and dissipation module, while the other components, for instance piston pump, hydraulic cylinder, valves, pressurized tank, etc., were studied with 1D thermal models. Finally, the whole "3D-1D-3D" thermal model of EHA was integrated on AMESim platform, and validated by experimental results. The results from simulations and experiments reveal the law of temperature rise in EHA, which provides the theoretical guidance for thermal design of EHA.
- electro-hydrostatic actuator (EHA) /
- thermodynamic modeling method /
- motor /
- law of temperature rise /
- piston pump

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图 1 EHA原理

Figure 1. Principle of EHA

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图 2 EHA能量传递及转换过程

Figure 2. Energy transfer and transformation process in EHA

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图 3 EHA的“三维+一维+三维”热力学建模方法

Figure 3. "3D-1D-3D" thermodynamic modeling method of EHA

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图 4 电机三维热力学建模架构

Figure 4. 3D thermodynamic modeling architecture of motor

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图 5 转速为18 000 r/min时电机轴截面稳态温度分布

Figure 5. Steady temperature distribution of motor axial section when speed is 18 000 r/min

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图 6 不同功率下电机总损耗随转速变化曲线

Figure 6. Total loss-speed curves of motor in different power conditions

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图 7 风速为5 m/s时增压油箱对流换热系数

Figure 7. Convective heat transfer coefficient of oil tank when wind speed is 5 m/s

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图 8 EHA的“三维+一维+三维”热力学模型

Figure 8. "3D-1D-3D" thermal model of EHA

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图 9 不同部件内油液温度

Figure 9. Oil temperature in different parts

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图 10 不同工作频率下伺服电机的油液温度

Figure 10. Oil temperature of servo motor under different working frequency conditions

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图 11 不同负载下伺服电机的油液温度

Figure 11. Oil temperature of servo motor under different load conditions

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图 12 伺服电机油液温度仿真数据与实验数据对比

Figure 12. Comparison between simulation data and experimental data of oil temperature of servo motor

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表 1 EHA参数

Table 1. EHA parameters

参数	数值
柱塞泵排量/(mL·r^-1)	4.3
定子绕组电阻/Ω	1.15
定子环电感/H	0.01
磁链/Wb	0.134
晶体管正向压降/V	1
晶体管电阻/Ω	0.013
活塞直径/mm	65
作动器行程/mm	50
二极管电阻/Ω	0.008 7
二极管正向压降/V	1.3

下载: 导出CSV

表 2 EHA运动规律

Table 2. Motion laws of EHA

正弦信号序号	幅值/mm	频率/Hz	周期/s	持续时间/s
1	2.1	1	1	506
2	7	2/3	1.5	33
3	28	1/3	3	51
4	42	1/5	5	10

下载: 导出CSV

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