火箭发动机轴承摇摆试验技术

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...

Swing test technology of bearing in rocket engines

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.