Numerical analysis of collision impact and sound noise in axial flow check valve

As a key fluid control device, axial check valves play a vital role in industrial systems, but they may encounter a series of problems during their operation, including noise and collision failure. Collision may lead to wear and fatigue of the valve components, which in turn affects their normal operation. Noise not only causes environmental pollution but also may adversely affect the staff and the surrounding environment. In this paper, based on the dynamic mesh and fluid-solid coupling of the valve closing process flow field and structural deformation of the three-dimensional numerical simulation study, we analyze the differential pressure on the valve collision impact characteristics and the valve internal flow under the influence of the noise law. The results show that the larger the pressure difference between the inlet and outlet, the faster the valve closes, the larger the impact generated by the collision, and the larger the deformation generated by the valve flap and valve seat. The axial flow check valve gradually closes when the flow path is narrowed, resulting in a higher flow field noise level. Sound pressure greater than 100 dB in the frequency range is mainly distributed at 200 Hz or less.