How to explain the cause of mechanical vibration in hydraulic pumps: Hydraulic pumps are composed of many parts. Due to the manufacturing errors of parts, improper assembly may cause vibration and noise of the hydraulic system,hydraulic pump vibration and noise of hydraulic valves,hydraulic pump and noise generated by hydraulic valves. It is different due to different types of valves, utilization conditions and other specific conditions. According to the cause of its occurrence, it can be roughly divided into two categories: mechanical sound and fluid sound.
Mechanical sound: Most hydraulic valves are composed of spool, valve body, control parts, fasteners, seals,hydraulic pump etc. It is through the process of external force that the spool moves,hydraulic pump and the spool moves to the corresponding position to cause fluid flow. Change to meet job demands. During this process, the mechanical contact of the movable parts in the valve generates noise.
Fluid sound: As the hydraulic valve changes its flow,hydraulic pump direction and back pressure at the end of austerity, reversal, and overflow, various changes occur in the flow, direction,hydraulic pump and back pressure of the fluid in the valve body, causing the valve and the pipe wall to vibrate, resulting in noise. According to the causes of pressure vibration, it can be divided into cavitation sound, movement sound, hydraulic shock sound and shock sound. Pipeline vibration and noise are mainly caused by the interaction of pumps, valves and other hydraulic components on the pipeline. Studies have shown that when the length of the pipeline is exactly an integer multiple of half the vibration pressure wavelength,hydraulic pump severe high-frequency noise will occur in the pipeline.
In addition,hydraulic pump external seismic sources may also cause pipeline resonance;hydraulic pump and when the cross-sectional area of the pipeline changes suddenly (rapidly enlarged and reduced or sharply turned), the liquid flow in it will change,hydraulic pump and turbulence may easily occur and cause noise.