同城品茶约茶yp服务联系方式-约单aapp平台city is large enough; in the choice of hydraulic pump is required to ensure the power and the flow of the premise, try to choose the hydraulic pump speed is low; can also use composite pump, improve the sensitivity of the relief valve, an unloading between the road to reduce noise.

The 2. control valve is another source of noise

The cavitation of the control valve produces fluid noise. This is because the oil flow to flow through the valve, resulting in a high velocity in the throttle, change velocity pressure, when the pressure is lower than atmospheric pressure, dissolved in the oil in the air will be separated, resulting in a large number of bubbles, the noise frequency will be very high.

In addition, in the jet flow, the oil flow rate is uneven and the eddy current occurs, or the noise is also caused by the oil flow is cut off. The solution to this kind of noise is to increase the back pressure at the lower side of the throttling orifice so that it is higher than the boundary value of the air separation pressure, and the method of multistage decompression can be used to prevent cavitation. When the general oil flow passes through the throttling orifice of the control valve, the ratio of the upstream pressure to the downstream pressure shall be 3~6.

The pressure fluctuation of the hydraulic pump causes the valve to resonate so as to increase the noise. In the control valve, especially throttle valve, its throttle opening small, high flow speed, easy to produce vortex, and sometimes the spool, mortar seat, vibration is great. When this happens, replace it with a small gauge valve or throttle it open.

When the directional control valve closes or opens, it will cause vibration and noise due to hydraulic shock. Such as when the solenoid valve is switching rapidly. Hydraulic shock will cause severe fluctuations of the pressure in the pipe and propagate along the pipeline. When it is transmitted to the hydraulic pump and the oil cylinder, it will cause vibration and noise in these links. Reduce this vibration and noise, should be reasonable through the valve and pipeline settings, minimize hydraulic impact.

3. the suction of the hydraulic pump produces noise

The suction phenomenon of a hydraulic pump means that the oil pump is directly sucked into the air or sucked into the oil and mixed with air. This phenomenon not only affects the oil quality, increases the noise, but also affects the volume efficiency of the hydraulic pump, which is not allowed in the hydraulic system. The main reason for this phenomenon is that the oil tank and the oil suction pipe are unreasonable. In order to prevent this phenomenon, the following measures should be adopted:

The design of the tank is reasonable and the volume is large enough. A long oil tank with a partition board can be divided into the oil tank and the fuel tank;

The oil in the tank should be added to the required height, and the oil suction pipe must enter the 3/5 depth of the oil tank;