The plunger pump is composed of many parts, due to the manufacturing error of parts, improper assembly will likely cause vibration and noise of the hydraulic system
Vibration and noise of hydraulic valves hydraulic valve attack noise, due to the variety of valves, application conditions and other detailed conditions are different. According to the cause of its attack can be roughly divided into mechanical sound and fluid sound two categories.
1) the mechanical noise
The large part of the hydraulic valve by the spool, valve body, control parts, fasteners, seals, and so on, he is the process of external force to make the spool movement, spool movement to the corresponding position to change the flow attack, to meet the work of beg. In this process temporary, the valve within the mechanical contact of movable parts attack noise.
2) fluid
Due to the hydraulic valve in the end of austerity, reversing, overflow, so that the flow of liquid in the valve body, direction and back pressure attack of all kinds of innovation, resulting in valve parts and pipe wall vibration, thereby attack noise. According to the cause of the burst pressure vibration, it can be divided into cavitation sound, motion sound, hydraulic impact sound and shock sound. Pipeline vibration and noise this main assumption due to pump, valve and other hydraulic components vibration in the pipeline caused by interaction. Research shows that when the length of the pipeline is exactly equal to half the vibration pressure wavelength integer times, the pipeline will burst into violent high-frequency noise.
In addition, the external source may also cause pipe resonance; When the cross - section of a line dies (expands and cuts sharply, or turns sharply), dui makes its fluid flow innovate, making it turbulent and noisy.
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