How to prevent hydraulic oil pollution in hydraulic press

Generally, during the operation of the oil press filter, the surface of the filter element will gradually collect dirt to form a blockage, which will cause the hydraulic system to malfunction. After the filter is blocked, it will cause the pump to absorb poor oil, generate noise, and the system cannot absorb sufficient oil. If it is not removed, there will be a lot of air bubbles in the pool and the filter element may increase the pressure and cause breakdown due to blockage.

After the filter of the hydraulic press is blocked, it should be cleaned in time. The cleaning method is as follows:



(1) Cleaning with solvent



Commonly used solvents are trichloroethylene, paint thinner, toluene, gasoline, carbon tetrachloride, etc. These solvents are easy to catch fire and have certain toxicity, so special attention should be paid to cleaning. You can also choose alkaline solutions such as caustic pot, caustic bait, surfactants and electrolytic degreasing cleaning, etc. After washing, you must wash with water and other methods to quickly remove the solvent.








(2) Cleaning with mechanical and physical methods



1. Use a brush to clean: a soft brush should be used to remove the dust on the filter element. An excellent wire brush will damage the mesh type and line-gap type filter element, so that the sintered filter element sintered particles will be brushed off, and this method is not suitable for paper quality filter.



2. Ultrasonic cleaning: The ultrasonic effect removes the dirt on the filter element in the cleaning solution, but the filter element is a porous material and has the property of absorbing ultrasonic waves, which may affect the cleaning effect.​​



3. Heating volatilization method: Some fouling on the filter can be removed by heating, but it should be noted that carbon ash and solid attachments cannot remain inside the filter element during heating.



4. Blow with compressed air: use compressed air to blow out the scale on the back of the filter scale layer, and the pulsating air flow is better.



5. Cleaning with water pressure: the method is the same as above, and the effect of alternating the two methods is better.








The reasons for the contamination of the hydraulic oil of the hydraulic press are many and complex, and the hydraulic oil itself is constantly producing stolen goods, so it is very difficult to completely solve the problem of the contamination of the hydraulic oil. In order to prolong the life of hydraulic components and ensure the reliable operation of the hydraulic system, it is a more practical method to control the pollution degree of hydraulic oil within a certain limit.

In order to prevent oil pollution, the following measures should be taken in actual work.



1. Keep the hydraulic oil clean before use. Hydraulic oil will be polluted by the outside world during transportation and storage. The newly purchased hydraulic oil looks clean, but it is actually very dirty.












2. Keep the hydraulic system clean after assembly and before operation. Hydraulic components must be cleaned during machining and assembly. The hydraulic system should be thoroughly cleaned after assembly and before operation. It is best to use the oil used in the system to clean. When cleaning, the fuel tank must be completely sealed except for the vent hole, and the seals must not have flash or burr.








3. Keep the hydraulic oil clean during work. The hydraulic oil will be polluted by the environment during the working process. Therefore, try to prevent the immersion of air and moisture. air filter.








4. Take a suitable oil filter. This is an important means of controlling hydraulic oil contamination. According to the requirements of the equipment, oil filters with different filtering methods, different precisions and different structures should be selected in the hydraulic system, and the oil filters and oil tanks should be checked and cleaned regularly.








5. Regularly replace the hydraulic oil. Before replacing the new oil, the oil tank must be cleaned once. When the system is dirty, it can be cleaned with kerosene. After draining, such as new oil.




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