The "kidney" hydraulic filter core of the hydraulic system

Kidney is an organ of vertebrates. It is responsible for filtering impurities in the blood, maintaining the balance between body fluid and electrolyte, and finally producing urine through the following pipes. In addition, it also has endocrine functions to regulate blood pressure. In the engineering machinery, there is also a part similar to the "kidney", that is, the hydraulic oil filter.

The "kidney" hydraulic filter core of the hydraulic system

The hydraulic oil filter element is used to filter solid impurities produced by external mixing or system operation in various oil systems. It is mainly installed on the oil suction roads, the pressure oil circuits, the oil return pipes, the bypass systems and the separate filtration systems in the system.

Product use

Industrial use of hydraulic oil in use because of various reasons mixed into some impurities, the main impurities are mechanical impurities, water and air, these magazines will cause corrosion speed, increase mechanical wear, reduce work efficiency, reduce the service life of the equipment to make oil deterioration, serious can be generated.

Production accidents are caused by blockage of oil raw road. The filtration of the hydraulic oil of the concrete pump, the filtration of the hydraulic oil of the engineering machinery, and the filtration of the hydraulic oil of the hydraulic station.

The problems that should be paid attention to in the installation of hydraulic oil filter core are:

(1) installed in the oil suction port of the hydraulic pump, installing oil filters on the suction port of the pump can protect all the components in the system, but because of the limitation of the oil suction resistance of the pump, only the net filter with small pressure loss can be selected. The oil filter has low filtration accuracy, and the particles produced by pump wear will enter the system, and other hydraulic components of the system can not be completely protected. Other oil filters should be used in the oil circuit.

(2) installed in the pump outlet, the installation can be effectively protected except the pump and other hydraulic components, but because the oil filter is working under high pressure, the filter should have high strength, in order to prevent the oil filter blockage caused by hydraulic pump overload or oil filter damage, often a plugging indicator or bypass valve protection is provided to the oil filter at.

(3) installed in the oil return road, the oil filter is installed on the system's oil back road. This way can filter out the particles produced by the falling off of the fuel tank or the oxide of the tube wall or the wear of the hydraulic components, so as to ensure the cleaning of the hydraulic oil in the fuel tank and protect the pump and other components. As the oil recovery pressure is low, the intensity of the oil filter needs not to be too high.

(4) installed on the branch, this way is mainly installed on the return valve of the relief valve, which will not increase the pressure loss of the main oil well, and the flow rate of the oil filter can also be smaller than that of the pump, which is more economical and reasonable. But it can not filter all the oil, and it does not guarantee that the impurities do not enter the system.

(5) separate filtration, using a hydraulic pump and oil filter to form a filter circuit independent of the system, so that impurities in the system can be cleaned up continuously, and the clearance in the system can be ensured. It is generally used in large hydraulic systems.

Maintenance method

The maintenance method of the hydraulic oil filter core is as follows:

1., before releasing, remove the original hydraulic oil. Check the oil return filter element, oil absorption filter element and pilot filter element to see if there are any iron chips or copper chips or other impurities. Some of them may have hydraulic components failure, and after cleaning and cleaning, they will be cleaned.

2. change all hydraulic oil filter core (return oil filter core, oil absorbing filter core, pilot filter core) at the same time when changing hydraulic oil, otherwise it is equivalent to no change.

3. identification of hydraulic oil marks, different labels, different brands of hydraulic oil do not mix, may be reactive metamorphic production of floc. It is recommended to use the excavator to specify the oil.

4. before refueling must be first installed on the oil absorption filter core, the oil absorption filter core directly to the main pump entrance to the main pump, into the impurities to speed the main pump wear, heavy pump.

5. to the standard position, the hydraulic tank usually has the oil level table, look at the level table. Pay attention to the way of stopping, usually all the oil cylinders are recovered, that is, the small arm and the bucket are fully extended and landed.

6. and after the oil pump to pay attention to the main exhaust air, or light is temporarily the whole car without action, the main pump noise (air, heavy cavitation sonic boom) damage to the main pump. The air discharge method is to release the pipe joint directly at the top of the main pump and fill the pipe directly.

Having a healthy kidney is important for a living creature, and a healthy hydraulic oil filter is also important for your machine. The house of engineering machinery provides you with a high quality: Donaldson hydraulic oil filter core.

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