Troubleshooting of oil leakage of four-column hydraulic press

The most common failure of the four-column hydraulic press is the leakage of the oil pipe. Once an oil leak occurs, as the manufacturer recommends the user, it is necessary to analyze the cause of the oil leak. Under normal circumstances, the oil leakage of the four-column hydraulic oil pipe is divided into two major aspects: the oil leakage at the oil pipe joint and the rupture of the oil pipe.

1. Oil leakage caused by poor layout of four-column hydraulic oil pipes 30%~40% of oil leakage in hydraulic system comes from unreasonable pipelines and poor installation of pipe joints.

Therefore, in addition to recommending the use of integrated circuits, stacking valves, logic cartridge valves and plate components to reduce the number of pipes and pipe joints, thereby reducing leakage locations, for essential pipes,
When piping, take the following measures:

① Minimize the number of pipe joints to reduce oil leakage.

② While shortening the length of the pipeline as much as possible (which can reduce the pressure loss and vibration of the pipeline, etc.), it is necessary to take measures to avoid the thermal elongation of the pipeline caused by the temperature rise causing the pipeline to be broken or torn, and pay attention to the quality of the joints.

③Similar to the hose, there needs to be a straight section L near the joint

④The bending length should be appropriate, not oblique.

⑤ Prevent leakage caused by hydraulic shock of the system. When hydraulic shock occurs, it will cause the joint nut to loosen and cause oil leakage. At this time, on the one hand, the joint nut should be retightened, and on the other hand, the cause of the hydraulic shock should be found out and tried to prevent it. For example, setting up accumulators to absorb vibration, and adopting buffer components such as buffer valves to eliminate vibration, etc.

⑥ leakage caused by negative pressure. For pipelines with an instantaneous flow rate greater than 10m/s, instantaneous negative pressure (vacuum) may occur. If the joint does not adopt a sealing structure to prevent negative pressure, the O-ring seal will be sucked away when negative pressure is generated. Leak due to element O-ring.

2. The four-column hydraulic oil pipe is broken

If the oil pipe of the four-column hydraulic pressure is broken, you must first find the place where it is broken or twisted. How to judge whether the hose is twisted? For the specific operation, you can draw a colored line on the hose to observe, and the colored line of the twisted hose changes from a straight line to a straight line. for the spiral
line, it is easy to cause oil leakage from the joint, and even cause the hose to rupture.

How to find out the location of pipeline rupture When it is found that the multi-pipe (core) components such as pipelines, coolers and hydraulic oil radiators are damaged, resulting in oil leakage, water leakage and air leakage, in order to quickly determine the damaged part, the cigarette blowing method can be used to find leak. That is, light a cigarette, take a few deep breaths, hold the smoke in your mouth, block one end of the suspected faulty tube (core), and blow the smoke at the other end, then the smoke on the tube (core) is the fault location. , and then look for the next part. This method is simple and easy to implement, effective and reliable, but pay attention to safety. If the broken pipe is found, it should be replaced or repaired.

The oil leakage incident of the four-column hydraulic oil pipe can be big or small, but attention should be paid to it. Maybe the dripping of each drop is often ignored at the beginning, but think carefully about 0.02mL for a drop of oil, and the oil volume of 1mL is 40~50 drops, if
A drop of oil is leaked in about 1s, 1mL is lost in 1min, 60mL is lost in 1h, 15L is lost in 24h, and 45L is lost in one month. The oil in a small oil tank can be completely leaked in a short period of time, so we must pay great attention to the dripping, and the hydraulic cylinder of the four-column hydraulic press needs to be checked regularly to prevent accidents. This article is from the official website of the manufacturer WORLD Press Machine www.pressmachine-world.com, please indicate the source for reprinting!