低噪声控制阀优化设计及试验验证

摘要

控制阀在舰船管路系统中运行时受流体激励产生振动噪声,抑制阀门节流口空化及降低阀内流动脉动是低噪声控制阀设计的关键.该文基于计算流体动力学方法,以某型分层迷宫式控制阀为对象,进行了低噪声的优化设计.优化设计方案采取了一系列有利于抑制空化、均匀流场并降低流动脉动措施,包括应用双层渐变开孔阀套、入流整流装置、阀芯吸振装置、出流导流装置等.优化设计方案的流动计算分析结果表明,优化设计方案有利于降低振动噪声源.通过对普通控制阀、分层迷宫式控制阀和新型低噪声控制阀台架试验对比结果表明,相同水力状态下新型低噪声控制阀水动力噪声、振动响应和空气噪声皆显著降低,优化设计方案得到了试验验证.%Control valves used in ship piping system become vibration and noise sources because of fluid dynamic excitation, low noise designs of control valves focus on suppressing inception of cavitations and evening flow dynamic characteristics. In this paper, some optimizations are used to control valve noise. The optimizations are two-double trim with uneven holes, inlet guidance, plug vibration isolation device, outlet guidance. CFD results show that the optimizations are effective. Experimental results on normal, layered labyrinth and new type low noise valves show that new type low noise valve behaves better hydrodynamic noise, vibration and air-noise performances. The optimization designs on low noise control valve are veri-fied experimentally.