Solutions To Control Valve Vibration--I

Solutions To Control Valve Vibration--I

01 Method of increasing spring stiffness

For oscillation and slight vibration, the stiffness can be increased to eliminate or weaken it. For example, it is feasible to choose a spring with a large stiffness and use a piston actuator.

02 Increased damping method

Increasing damping means increasing the friction against vibration. For example, the valve plug of the sleeve valve can be sealed with an "O" ring, and graphite packing with greater friction can be used. This has a certain effect on eliminating or reducing slight vibration.

03 Increase the guide size and reduce the fit clearance method

Axial-plug valve generally has a small guide size, and the fit clearance of all valves is generally large, 0.4~1mm, which is helpful for generating mechanical vibration. Therefore, when slight mechanical vibration occurs, the vibration can be weakened by increasing the guide size and reducing the fit gap.

04 Change the shape of the throttle and eliminate the resonance method

Because the so-called vibration source of the regulating valve occurs at the orifice with high-speed flow and sharp pressure changes, changing the shape of the throttle can change the frequency of the vibration source, which is easier to solve when the resonance is not strong.

The specific method is to turn the surface of the valve core within the range of vibration opening by 0.5 to 1.0 mm. For example, a self-operated pressure regulating valve is installed near the area of a certain manufacturer, and the squeal generated by resonance affects the rest of the employees. After the spool surface is turned off by 0.5mm, the resonance squeal disappears.