Valve repair using high noise often encountered in the valve, the valve will generate a high level of noise is generated, and how to eliminate or reduce it? Let us fully to understand the understanding of the factors and the dangers of high valve noise. The valve repair factory Jiangyin Oulei Si: high noise level for humans, not only interfere with life, and can lead to permanent hearing failures and unsafe working environment. The valve is the most obvious and the most comfortable one manic sound. Studies have shown that long-term exposure to high noise levels, hearing damage. Hearing damage is progressive and irreversible, the beginning of the high-frequency failures, the top the hearing continue malfunction eventually lead to lower frequency will malfunction, it affects the ability to listen to normal language. When subjected to low frequency noise, the function of human organs such as the heart or liver may also be affected. In addition, the noise and vibration associated also affect valve performance and lead to the valve pipeline and adjacent equipment fatigue.
Analysis: When vibration produces a wide range of changes in atmospheric pressure, will produce manic sound, then as manic sound transmitted to the eardrum into the inlet valve repair. Eardrum it is 1100ft / s (335m / s) the speed of sound [750m / h (1200km / h)] diffusion. The noise of the valve can be produced in many different ways, the most common cause, however, is generated by the valve geometry, turbulence, caused by the downstream pipeline diffusion. In many cases, the noise contribution not help the valve body to the body diffusion, because the valve body itself is rigid and sturdy. Process turbulence will produce vibration of the valve or valve member. Manic sound is caused by the vibration generated by the random pressure fluctuations within the valve assembly, or the obstacle collision by a fluid stream, for example, caused by the vibrations generated by the valve body, the valve disc or other closure element. When the closing element continue to impact its director, for a long time will cause the noise of the sound of explosions. Because its frequency levels below 1500Hz, it does not interfere with normal observers. However, these stem or with a guide shaft of explosion can damage limit guide and the valve seat surface. The valve parts of explosion noise another secondary benefit is provided in the turbulence generated the manic sound pressure within the valve of this secondary warning information, is corrected before the accident is required. The vibration can also be caused by certain resonance at its natural frequency of the valve parts or accessories, they are often at a lower noise level (less than 100dBA) found. This type of noise is characterized by a tone color or the Weng Weng sound (frequency in the 300 to 700 Hz), it is to produce high levels of stress in the material of the member material fatigue and causing material becomes weak. The noise contribution of fluid by hydrodynamic or aerodynamic sound. For liquid operation, the fluid dynamic noise is caused by the turbulence of the flow, cavitation and flash, or in the high speed of the fluid through the cross section of the contraction caused.
The analysis of the above reasons sum up: the noise generated by the liquid stream does not produce a high noise level and staff endured. Severe cavitation or flashing operation, the noise level can reach a higher level must go through to change the process or in the valve anti cavitation member installed for disposal, while the valve repair the valve in the grinding process may also cause the valve noise, To reduce such things to try to use a high-quality valve grinding machine, valve grinding equipment selection.
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