How to determine if the hydraulic system is malfunctioning

May 26,2023

Firstly, we can listen to whether there is excessive noise during the operation of the hydraulic pump and hydraulic system, whether there is a scream from pressure control components such as relief valves and sequence valves, and whether there is an impact sound when the hydraulic cylinder of the workbench is reversing. This refers to whether there is an excessive impact sound when the piston hits the bottom of the cylinder, and whether there is a phenomenon of hitting the end cover when the reversing valve is reversing.

The second is to understand the working status of the moving parts of the mold by touching them with your hands

1. Touch the vibration, touch the vibration of moving parts and pipelines with your hands, and if there is high-frequency vibration, check the cause.

2. Touch and crawl, when the workbench is moving at low speed under light load, use your hand to feel for any crawling phenomenon

3. Touch the tightness of the gear block, microswitch, and fastening screws with your hand

Generally, different people may have different feelings and differences, but after repeated practice, the problem will eventually be solved. This method is mainly aimed at experienced technical personnel who are more experienced.

How to prevent hydraulic press malfunctions

1. Control hydraulic oil pollution, strengthen equipment maintenance, and regularly inspect hydraulic oil. Before changing the oil, carefully clean the hydraulic system. Many deep hole boring hydraulic systems have never changed oil between major repairs, which is often a potential accident hazard.

2. Control of heating and hydraulic impact During major repairs, it was found that the sealing parts of the deep hole boring section were severely aged, mainly due to system heating. The hydraulic oil temperature increased, and after clamping the oil cylinder, the directional valve could be stopped in the middle position, causing the pump station to stop. This not only saves electricity, but also allows the oil temperature inside the pump station to quickly cool to normal temperature.

Due to reasons such as pump shutdown and workpiece replacement, the system has been impacted frequently, and the correct operation of the system is particularly important. Do not switch the direction of the directional valve quickly when there is a malfunction in the clamping system without identifying the cause. The result will only be a system oscillation and stagnation. The reason is that the hydraulic press impact causes the overflow valve to not respond in time, which will cause the system to experience impact action. Repeated impact, due to high pressure and system heating, the seal is damaged and leakage increases, resulting in loose clamping.

The correct method is to idle the pump station several times before clamping the oil cylinder, observe if there are any abnormalities in the system, and then slowly operate the directional valve to start clamping, which will greatly extend the service life of the system.