And the impact between the needle and its seat works in short time and brings very large impact stress,which decides the working reliability of components.
针对柴油机喷油器内的针阀运动速度快,作用时间短,负荷强度高的特点,按针阀实际工作负荷确定加载函数,采用有限元方法,对喷油器多质量运动系统进行非线性动力学分析,研究针阀碰撞的影响因素,模拟针阀系统的运动,计算冲击应力。
Application of needle valve to urban water and wasterwater treatment plants to avoid the cavitation and regulate water and air flow is introduced.
从避免气蚀和调节水、气流量等方面介绍了电动针阀在城市给水厂和污水处理厂中的应用,并结合杭州西区水厂和七格污水处理厂的实例阐述了电动针阀结合流量计在水厂输水管线流量调节中的控制方法,以及溶氧仪和针阀联动控制曝气池DO的应用。
In addition, we suggest some new concepts and consider the effect of the shape of pin valve and pressure chamber on the atomization of a jet.
此外,笔者提出了若干新的概念和考虑了针阀和压力室形状对射流雾化的影响。
