起落架收放作动筒串联 VL 型密封低温密封特性研究

中国民航大学学报 ›› 2025, Vol. 43 ›› Issue (5): 64-72.

起落架收放作动筒串联 VL 型密封低温密封特性研究

中国民航大学航空工程学院，天津 300300

收稿日期:2024-07-30 修回日期:2024-09-30 出版日期:2025-11-17 发布日期:2025-11-17
作者简介:魏戬（1988— ），男，江苏徐州人，实验师，硕士，研究方向为流体密封技术
基金资助:
中央高校基本科研业务费专项（3122025043）

Study on low-temperature sealing characteristics of series VL-type seal of

retracting and releasing actuator of landing gear

College of Aeronautical Engineering, CAUC, Tianjin 300300, China

Received:2024-07-30 Revised:2024-09-30 Online:2025-11-17 Published:2025-11-17

摘要/Abstract

摘要：

为研究串联 VL 型密封在低温环境下的密封特性，首先，本文以某型飞机起落架收放作动筒用串联 VL 型密

封为例，测试了密封材料聚四氟乙烯和丁腈橡胶在不同环境温度下的应力、应变数据。其次，采用 ABAQUS

有限元分析软件建立了串联 VL 型密封二维轴对称模型，并建立了往复串联 VL 型密封的混合润滑模型；

以摩擦力和泄漏量为评价指标，基于实际工况分析环境温度、介质压力、往复速度对串联 VL 型密封特性的

影响。结果表明：随着环境温度降低，串联 VL 型密封的回弹性能下降，密封面的接触压力和接触宽度变小，

中间压力增大，净泄漏量增加；随着往复速度增大，流体动压效应增强，油膜厚度增大，摩擦力减小，净泄漏量

增加；随着介质压力增大，串联 VL 型密封的接触压力和摩擦力增大，净泄漏量增加。

关键词:

起落架, 低温环境, 串联 VL 型密封, 混合润滑, 密封性能

Abstract:

In order to study the sealing characteristics of series VL-type seal in low temperature ambient, firstly, this paper

takes the series VL-type seal for the retracting and releasing actuator of a certain type of aircraft landing gear as an

example, test the stress-strain data of seal material of polytetrafluoroethylene and nitrile butadiene rubber under

different ambient temperatures. Secondly, the finite element analysis software ABAQUS is used to establish a two dimensional axisymmetric model of series VL-type seal, and a mixed lubrication model of reciprocating series VLtype seal is established. Taking friction force and leakage as evaluation indicators, the influence of ambient temperature, medium pressure and reciprocating speed on sealing characteristics is analyzed based on actual working

conditions. The results show that with the decrease of ambient temperature, the resilience of the VL-type seal decreases, the contact pressure and contact width of the sealing surface are decrease, the intermediate pressure increases, and the net leakage increases. With the increase of the reciprocating speed, the dynamic pressure effect of

fluid increases, the oil film thickness increases, the friction force decreases, and the net leakage increases. With

the increases of medium pressure, the contact pressure and friction force of the series VL-type seal in increases,

and net leakage increases.

Key words:

landing gear, low temperature ambient, series VL-type seal, mixed lubrication, sealing performance

中图分类号:

V226

魏戬, 刘路卓, 田静, 刘雨杭.

起落架收放作动筒串联 VL 型密封低温密封特性研究

[J]. 中国民航大学学报, 2025, 43(5): 64-72.

WEI Jian, LIU Luzhuo, TIAN Jing, LIU Yuhang.

Study on low-temperature sealing characteristics of series VL-type seal of

retracting and releasing actuator of landing gear

[J]. Journal of Civil Aviation University of China, 2025, 43(5): 64-72.

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