新型双出杆活塞式磁流变减摆器结构设计及性能研究

田静; 张亚男

doi:10.13433/j.cnki.1003-8728.20220094

新型双出杆活塞式磁流变减摆器结构设计及性能研究

doi: 10.13433/j.cnki.1003-8728.20220094

田静,
张亚男

中国民航大学航空工程学院，天津　300300

基金项目: 中航工业产学研协同创新专项（cxy2013MH35）

详细信息

作者简介:
田静（1972−），教授，硕士生导师，博士，研究方向为磁流变减震技术和飞机维修理论及故障诊断技术，715732278@qq.com

中图分类号: V226；TH137
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-30
- 刊出日期: 2023-09-30

Structural Design and Performance Research of New Type Double-rod Piston Magnetorheological Shimmy Damper

College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China

摘要

摘要: 被动油液式减摆器对摆振激励的改变不能实时响应，传统磁流变（Magnetorheological，MR）减摆器存在引线复杂、不利于散热、输出阻尼力较低等方面的不足。针对上述问题，为了有效抑制飞机前轮摆振，提出一种新型压差式结构的双出杆活塞式MR减摆器，内置固定双线圈，内筒两端与磁芯和导磁环形成对称双阻尼通道；根据减摆需求完成结构设计，利用ANSYS/Emag 2020 R1对MR减摆器进行磁场仿真，仿真结果验证理论分析的合理性；最后进行力学性能分析。结果表明：设计的MR减摆器输出阻尼力满足减摆需求，动力可调系数较大，示功曲线近似于椭圆。所采用的研究思路对今后飞机起落架MR减摆器的研发具有一定指导意义。
- 磁流变减摆器 /
- 结构设计 /
- 磁场仿真 /
- 力学性能
Abstract: Passive oil-type shimmy dampers cannot respond to the change of shimmy excitation in real time. Traditional magnetorheological (MR) shimmy dampers have shortages such as complicated lead wires, unfavorable heat dissipation and low output damping force. For the above problems, a new differential pressure structure type of double-rod piston MR shimmy damper, applicable to suppress the shimmy of the nose wheel of the aircraft, was presented. It has the fixed double coils, and the two ends of the inner cylinder forming a symmetrical double damping channels with a magnetic core and a magnetic guide ring. According to the requirements of shimmy reduction, the structure design was completed, and the ANSYS/Emag 2020 R1 was used to simulate the magnetic field of the MR damper, which verified the rationality of the theoretical analysis. Finally, the mechanical properties were analyzed. The results show that the output damping force of the designed MR shimmy damper meets the demand of damping, the dynamic adjustable coefficient is large, and the indicator curve is approximate to ellipse. The design idea adopted in this paper has certain guiding significance for the future research of MR shimmy damper of the aircraft landing gear.
- magnetorheological shimmy damper /
- structural design /
- magnetic field simulation /
- mechanical property

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图 1 不同结构形式MR减摆器

Figure 1. Different structural forms of MR dampers

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图 2 新型双出杆活塞式MR减摆器原理图

Figure 2. Schematic diagram of a novel double-out-rodpiston MR damper

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图 3 密封部位

Figure 3. Sealing components

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图 4 MR减摆器结构尺寸

Figure 4. MR damper structural dimensions

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图 5 MR减摆器装配图

Figure 5. MR damper assembly diagram

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图 6 磁路走势

Figure 6. Distribution of magnetic flux

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图 7 MR减摆器建模示意图

Figure 7. Schematic diagram of the MR damper model

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图 8 材料导磁性能曲线

Figure 8. Magnetic permeability performance of the materials

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图 9 磁感应强度云图

Figure 9. Cloud map of induction intensity

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图 10 磁力线走势图

Figure 10. Distribution of magnetic field lines

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图 11 阻尼通道有效长度磁感应强度B

Figure 11. Magnetic induction intensity along the effective length of the damping channel

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图 12 阻尼通道平均磁感应强度$\bar B$

Figure 12. Average magnetic induction intensity in the damping channel

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图 13 MR减摆器运动示意图

Figure 13. Schematic diagram of the motion of the MR damper

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图 14 MR减摆器F-v曲线

Figure 14. The F-v curve of the MR damper

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图 15 不同速度下的动力可调系数

Figure 15. The dynamic adjustable coefficient atdifferent speeds

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图 16 MR减摆器示功图

Figure 16. Indicator diagram for the MR damper

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表 1 不同工况下的理论阻尼力

Table 1. Theoretical damping force under differentoperating conditions

序号	振幅/mm	频率/Hz	理论阻尼力/kN
1	2.8	3	1.23
2	1.4	7	1.44
3	0.7	11	1.13
4	0.7	15	1.54

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表 2 结构尺寸参数

Table 2. Structural dimension parameter

参数	数值/mm	参数	数值/mm
R₀	5	L_m	10
R₁	11.5	t_m	0.8
R₂	18.5	L_n	42
R₃	22	t_n	1
R₄	24.5	L_c	12
R₅	13	W_c	5.5
L_g	7

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表 3 不同电流下MRF屈服强度

Table 3. MRF yield strength under different currents

电流/A	阻尼通道$\bar {{B} }$/T	τ_y/kPa
0.25	0.2415	10.26481
0.50	0.4375	23.43169
0.75	0.5475	30.70975
1.00	0.6105	34.52339
1.25	0.6515	36.81403

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表 4 系数c数值

Table 4. Numerical values of the coefficient c

v/（m·s⁻¹）	I/A
v/（m·s⁻¹）	0.25	0.50	0.75	1.00	1.25
0	2.07	2.07	2.07	2.07	2.07
0.04	2.16	2.11	2.10	2.10	2.10
0.08	2.23	2.15	2.13	2.12	2.12
0.12	2.30	2.18	2.16	2.15	2.15
0.16	2.35	2.22	2.19	2.17	2.17
0.20	2.40	2.25	2.21	2.20	2.19
0.24	2.44	2.27	2.23	2.22	2.21

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