摘要
大推力火箭发动机摇摆过程中,摇摆轴承使用环境与轴承自身设计指标不同,在承受较大径向载荷的同时,还要承受一定的轴承载荷,并实现低速往复摆动。为获得轴承的静态承载能力摩擦系数及疲劳寿命等关键参数,设计了一种新的轴承试验系统,模拟轴承在发动机不同工作状态下的安装边界和受载形式。通过试验获得了相应的数据,试验结果表明:轴承静态承载能力不小于920 kN,单、双摆状态下的疲劳寿命大于实际使用寿命的10倍,单摆状态的摩擦系数0.045,双摆状态的摩擦系数不大于0.08。目前,经过该方案验证的轴承已多次成功应用于某型液体火箭发动机。
In the swing of high thrust rocket engine,unlike design index,the swing-bearing not only bears a large radial load,but also bears a certain bearing load,and realizes low-speed reciprocating swing.In order to obtain the static bearing capacity,friction coefficient and fatigue life,a new bearing test system was designed to simulate the installation boundary and loading form of the bearing under different working conditions.The test results show that the static bearing capacity is not less than 920 kN,the fatigue life is more than 10 times of actual service life under the single and double pendulum,the friction coefficient of the bearing is 0.045(single pendulum)and not more than 0.08(double pendulum).At present,the bearing verified by the scheme has been successfully applied to a certain type of liquid rocket engine for many times.
作者
袁军社
赵长安
杨孟博
王婷
YUAN Junshe;ZHAO Chang'an;YANG Mengbo;WANG Ting(Science and Technology on Liquid Rocket Engine Laboratory,Xi'an Aerospace Propulsion Institute, Xi'an 710100,China)
出处
《火箭推进》
CAS
2022年第1期83-89,共7页
Journal of Rocket Propulsion
基金
国家基础加强技术领域基金(2019-JCJQ-JJ-480)。
关键词
火箭发动机
轴承
摇摆试验
安装边界
试验系统
静态承载
摩擦系数
疲劳寿命
rocket engines
bearing
swing test
installation boundary
test system
static load
friction coefficient
fatigue life
作者简介
袁军社(1982—),男,硕士,高级工程师,研究领域为发动机结构强度试验技术。
