Summary:Among the fluid dynamics effects of butterfly valves, vibration and noise are two important issues, which are directly r...
Among the fluid dynamics effects of
butterfly valves, vibration and noise are two important issues, which are directly related to the stability of the system and the comfort of the working environment.
Vibration
Causes:
Eddy current excitation: The existence of eddy current will form vibration excitation around the butterfly plate, causing the valve and pipe to vibrate.
Unstable flow: When a butterfly valve is partially closed, the fluid may experience unstable flow, causing vibrations.
Influencing factors:
Flow rate: Higher flow rates increase the potential for vibration, especially when the butterfly valve is partially closed.
Butterfly plate design: The design and shape of the butterfly plate are directly related to the intensity and frequency of vibration.
Valve opening: Partially closed valves are more likely to cause unstable flow and vibration.
Impact and issues:
Structural fatigue: Vibration can cause structural fatigue in valves and piping, shortening equipment life.
Noise: Vibration creates noise, which can have adverse effects on the health of the work environment and equipment.
Noise
Causes:
Turbulence Noise: The presence of turbulence is often accompanied by noise, especially at high speeds.
Butterfly plate movement noise: The movement, contact or interaction of the butterfly plate with fluid may produce noise.
Influencing factors:
Flow velocity: High-velocity fluids generally cause greater turbulence noise.
Disc Design: The shape and surface treatment of the disc affect the noise produced when it interacts with the fluid.
Valve opening: Partially closed valves are more likely to cause noise.
Impact and issues:
Working environment: High-intensity noise will affect the surrounding working environment and have a negative impact on the health and work efficiency of workers.
Regulatory Compliance: Noise levels may be restricted by regulations and need to comply with relevant environmental regulations and industry standards.
Ways to reduce vibration and noise:
Optimize butterfly plate design:
The butterfly plate design is optimized by aerodynamics and structural dynamics to reduce the interaction between the butterfly plate and the fluid, reducing vibration and noise.
Control flow rate:
Reducing the flow rate of the fluid, especially when partially closed, helps reduce vibration and noise generation.
Use a damper:
Adding appropriate dampers to the system, such as mufflers and damping devices on valves and pipes, can help absorb vibration and reduce noise.
Choose materials wisely:
Choose materials with vibration-absorbing and sound-insulating properties to help reduce vibration and noise.
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