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直升机传动系统用铝青铜-聚苯酯涂层磨损性能研究
作者:
作者单位:

中国航发湖南动力机械研究所,湖南 株洲 412002

作者简介:

佘定君,硕士,高级工程师,研究方向为直升机传动系统设计。E-mail:deanshaw@sohu.com。

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中图分类号:

TG174.4

基金项目:


Fretting Wear Test of Aluminum Bronze-Polyester Coating for Helicopter Transmission System
Author:
Affiliation:

AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002,China

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    摘要:

    直升机行星传动系统由于结构紧凑、传递功率高、承载能力高、抗冲击和振动能力强及传动平稳等优点,在航空航天领域中得到了广泛应用。为了提高行星传动系统的轮系减速结构中行星齿轮的均载性,避免单个行星轮过载断齿失效,通常将其设计为以支承环浮动支承的太阳齿轮。然而,这种设计导致支承环与太阳齿轮之间的接触部位在工作时可能产生严重的微动磨损。因此,在支承环表面制备铝青铜-聚苯酯涂层,以提升其抗微动磨损性能。采用等离子喷涂工艺,将通过机械混匀的铝青铜和质量分数约5%的聚苯酯混合粉末(KF-1301)喷涂在以30Ni4CrMoA钢为基体的支承环表面。喷涂前试样表面需经刚玉砂喷砂处理,以提高表面粗糙度。通过扫描电子显微镜(SEM)和光学显微镜,对制备的涂层进行微观形貌和孔隙率分析。结果表明,涂层的孔隙率约为31.8%,表面洛氏硬度平均值为79.9 HR15Y,结合强度平均值为42.6 MPa。通过SRV-4微动摩擦磨损试验机,测试涂层的抗微动磨损性能。结果表明,涂层的摩擦系数平均值约为0.169,具有较好的减摩性能,磨损机制主要为磨粒磨损,同时伴有粘着磨损。对喷涂铝青铜-聚苯酯涂层的支承环进行零件级摩擦磨损试验,发现涂层无开裂、剥离、剥落和严重磨损等异常情况。对试验前后相同位置涂层的厚度进行测量,结果显示涂层的磨损量非常小。铝青铜-聚苯酯涂层具有较高的硬度、结合强度及较低的摩擦系数,可满足抗微动磨损涂层应用的技术要求,在模拟工作状态下其表现出优异的抗磨损性能,未出现明显的异常磨损现象,说明该涂层可有效地提高直升机传动系统的耐磨性和使用寿命。

    Abstract:

    Helicopter planetary transmission systems are widely used in the aerospace field due to their compact structure, high power transmission capability, high load-bearing capacity, strong resistance to impact and vibration, and smooth operation. In these systems, the reduction gear structure is designed to improve the load sharing among planetary gears and prevent overloading and gear tooth breakage in individual planetary wheels by supporting the sun gear with a floating ring gear. However, the incomplete fixation between the ring gear and the sun gear can lead to severe fretting wear at their contact points during operation. This study aims to enhance the fretting wear resistance of aluminum bronze-polyester coatings by preparing and evaluating these coatings. Aluminum bronze and approximately 5% mechanically mixed polyester powder (KF-1301) were plasma-sprayed onto the 30Ni4CrMoA steel substrate. Prior to spraying, the sample surface was treated with corundum sandblasting to increase surface roughness. The prepared coatings were characterized using scanning electron microscopy (SEM) and optical microscopy, revealing a porosity of approximately 31.8%. The average surface Rockwell hardness of the coatings was 79.9 HR15Y, and the average bond strength was 42.6 MPa. The fretting wear resistance of the coatings was tested using the SRV-4 fretting friction wear tester. The results indicated an average friction coefficient of about 0.169, demonstrating good friction reduction performance. The primary wear mechanism was abrasive wear, accompanied by adhesive wear. Part-level friction wear tests on support rings coated with aluminum bronze-polyester showed no cracking, peeling, spalling, or severe wear. Thickness measurements before and after the tests indicated minimal wear. In conclusion, the aluminum bronze-polyester coating exhibits high hardness, bond strength, and a low friction coefficient, meeting the technical requirements for anti-fretting wear applications. Part-level wear tests confirmed that the coating performs excellently under simulated working conditions, showing no significant abnormal wear. Therefore, the aluminum bronze-polyester coating can effectively improve the wear resistance and service life of helicopter transmission systems.

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佘定君.直升机传动系统用铝青铜-聚苯酯涂层磨损性能研究[J].材料研究与应用,2024,18(4):662-667.

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  • 收稿日期:2023-01-04
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  • 在线发布日期: 2024-08-26
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