马良冬，唐斌，鲍益东，郭强，毕宸洋

摘 要：针对飞机液压系统铝合金螺纹连接结构微动磨损产生渗漏的问题，设计了一种环氧树脂螺纹锁固剂。以粘接性能和耐油性能为判据依次确定了螺纹锁固剂的基体树脂、固化剂、粉末填料，得到了满足实际需要的锁固剂配方，结果表明：所研制的ED-V10Z20配方性能最优，常温固化24 h即可使用，拉伸剪切强度为1.53 MPa，浸泡于15号航空液压油质量无明显变化。并以M42螺栓为例，计算了施涂时所需锁固剂的用量，施涂后以78.4 N·m拧紧力矩装配，松开力矩为298.7 N·m，大于技术指标，满足使用要求。

关键词：环氧树脂;螺纹锁固剂;配方设计;铝合金螺纹;液压系统

中图分类号：TQ430.7+74 文献标识码：A 文章编号：1001-5922（2021）12-0001-06

Application of Epoxy Resin Screw Locking Agent in Aircraft Aluminum Alloy Screw Joint

Ma Liangdong1， Tang Bin2， Bao Yidong1， Guo Qiang3， Bi Chenyang3

（1.College of Mechanical & Electrical Engineering， NUAA， Nanjing 210016， China; 2. 2.Wuhu State-owned Factory of Machining， Wuhu 241000， China;3.Shanghai University， Shanghai 200444， China）

Abstract：To solve the leakage problem caused by fretting wear of aluminum alloy screw joint structure in aircraft hydraulic system， an epoxy resin screw locking agent is designed. With the bonding performance and oil resistance as the criterion， the matrix resin， curing agent and powder filler of the screw locking agent are determined in turn， and the locking agent formula that met the actual needs is obtained. The results show that the developed ED-V10Z20 formula has the best performance， which can be used after curing for 24 h at room temperature. The tensile shear strength is 1.53 MPa， and there is no obvious change when it is soaked in the quality of No. 15 aviation hydraulic oil. The M42 bolt is taken as an example to calculate the amount of locking agent required during coating. After coating， the tightening torque of assembly is 78.4 N·m， and the loosening torque is 298.7 N·m， which is greater than the technical index and meets the requirements

Key words：Epoxy resin; Screw locking; Formula design; Aluminum alloy screw; Hydraulic system

0 引言

液壓系统中铝合金螺纹连接是一种重要的连接方式，连接部位多采用硫酸阳极化的方法以提高零件表面性能，该表面处理工艺防腐效果较好，但抗磨损性能较差[1-2]。在机上振动环境下，易产生螺纹磨损松脱，导致液压系统漏油，影响飞行安全。因此研究铝合金螺纹连接防损伤松脱的工艺方法十分必要。

铝合金螺纹连接结构产生微动磨损的主要原因：一是螺纹连接存在一定的轴向间隙，给螺纹在外力作用下的窜动提供了空间，工作中不断接触咬合，螺纹拧合部位易出现磨损损伤;二是机上振动无法避免，飞机的振动尤其是发动机附近的高频振动会恶化螺纹拧合面间的工作状况，加剧微动磨损的产生[3-4]。

为提高铝合金螺纹连接部位抗磨能力，提升产品服役可靠性，采用螺纹锁固剂方案，通过锁固剂胶液填充螺纹间隙，利用胶液紧固作用消除螺纹拧合间隙，消除振动带来螺纹拧合部位损伤的影响。……