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Reasons and solutions for the high noise of the four-column hydraulic press

by:WORLD     2022-10-31

Reasons and solutions for the high noise of the four-column hydraulic press

(1) The equipment has been used for a long time, and noise occurs after the parts are aged;

(2) The hydraulic pump distribution plate of the four-column hydraulic press is damaged, and the solenoid valve spring is damaged;

(3) Oil pressure suction, and the liquid contains air.​​

The solution to the noisy four-column hydraulic press

First, the noise of the relief valve of the four-column hydraulic press

The overflow valve is prone to high-frequency noise, which is mainly caused by the unstable performance of the pilot valve, that is, the noise generated by the high-frequency oscillation of the pressure in the front chamber of the pilot valve caused by the air vibration. The main reasons are:

(1) Air is mixed into the oil, and cavitation is formed in the front cavity of the pilot valve, causing high-frequency noise. At this time, the air should be exhausted in time and the outside air should be prevented from re-entering.​​

(2) The needle valve is excessively worn due to frequent opening during use, so that the needle valve cone surface and the valve seat cannot be tightly fitted, resulting in unstable pilot flow, pressure fluctuations and noise. At this time, it should be repaired or replaced in time.

Second, the noise of the hydraulic pipeline of the four-column hydraulic press

Too many dead bends in the pipeline or loose fixing clips can also generate vibration and noise. Therefore, dead bends should be avoided as far as possible in the pipeline arrangement, and the loose clamps should be tightened in time.

The noise of the hydraulic cylinder of the third and fourth column hydraulic press

(1) There is air mixed in the hydraulic oil of the hydraulic pressure or the air in the hydraulic cylinder is not completely exhausted, and the cavitation phenomenon occurs under the action of high pressure, which causes a large noise. At this time, the air must be exhausted in time.

(2) The oil seal of the cylinder head is too tight or the piston rod is bent, and noise will also be generated due to the tension during the movement. At this time, it is necessary to replace the oil seal or straighten the piston rod in time.

Fourth, when the four-column hydraulic oil is mixed with air, it is easy to form cavitation in its high-pressure area, and spread in the form of pressure waves, causing the oil to oscillate and cause the system to produce cavitation noise. The main reasons are:

(1) The oil filter and oil inlet pipe of the hydraulic pump are blocked or the viscosity of the oil is too high, which can cause the vacuum at the oil inlet of the pump to be too high and allow air to penetrate.

(2) The oil seal at the shaft end of the hydraulic pump and pilot pump is damaged, or the oil inlet pipe is poorly sealed, causing air to enter

(3) The oil level of the oil tank is too low, so that the oil inlet pipe of the hydraulic pump is directly sucked.​​

When high noise occurs during the operation of the hydraulic pump of the hydraulic press, the above-mentioned parts should be checked first, and the problem should be dealt with in time. This article comes from the hydraulic manufacturer WORLD Press Machine official website, please indicate the source for reprinting!

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