1、 Working principle

The coating hydraulic oil filter element is the core filtering component of the hydraulic system in the coating production line, mainly used to purify the hydraulic oil medium inside the hydraulic circuit. During the operation of hydraulic systems, hydraulic oil is affected by equipment wear, environmental dust intrusion, and oil oxidation, which can produce pollutants such as metal debris, colloidal impurities, and oxidized precipitates. The hydraulic oil carrying impurities flows through the filter element under the pressure of the system, relying on the physical screening, adsorption and interception of the filter material inside the filter element to trap solid impurities outside the filter material or inside the filter layer. After filtration and purification, the clean hydraulic oil flows out of the filter element and continues to supply the hydraulic actuator. The filter element is equipped with a support skeleton to prevent deformation and damage of the filter material due to oil pressure impact, and the end cap sealing structure avoids bypass short circuits of unfiltered oil. Part of the filter elements are equipped with a pressure difference warning structure. When the pressure difference before and after the filter material is clogged reaches the set threshold, a blockage warning signal is issued to remind the operation and maintenance personnel to replace the filter element in a timely manner, prevent impurities from entering the valve group and oil cylinder, causing component wear and jamming, and ensure the stable operation of the coating hydraulic drive equipment.

2、 Technical parameters

1. Filtration process: pressure type medium filtration, achieving interception and purification of solid impurities in coating hydraulic oil;

2. Homework method: Online continuous filtering operation, continuously working with the hydraulic system cycle;

3. Equipment configuration: filter material layer, internal and external support skeleton, sealed end cover, pressure difference detection component, installation connection interface;

4. Process conditions: working pressure 1.0-32MPa, filtration accuracy 3-20 μ m, allowable working oil temperature -20-80 ℃;

5. Filtering indicators: High impurity interception efficiency, no oil bypass leakage, pressure difference reaching the set value indicating blockage, protecting hydraulic valves and cylinders from wear and tear;

6. Weather resistance: The filter material has resistance to hydraulic oil corrosion, impact resistance, and is suitable for dust and humid working conditions in the painting workshop;

7. Applicable medium: ordinary anti-wear hydraulic oil, suitable for various hydraulic drive equipment in coating production lines;

8. Supporting performance: It can be paired with a differential pressure alarm, with blockage prompts, making it easy for daily maintenance and upkeep of the equipment.

3、 Application scope

Coating hydraulic oil filter element solves the problems of internal impurities and particles in hydraulic oil causing wear on precision hydraulic components, resulting in oil cylinder leakage, stuck reversing valve, and shaking operation, and protects hydraulic equipment in the coating production line. Widely used in hydraulic drive units for coating suspension and conveying, lifting hydraulic mechanisms, robot hydraulic stations, electrophoresis tank hydraulic lifting devices, drying chamber hydraulic opening and closing mechanisms, workpiece hydraulic fixture clamping mechanisms, and pre-treatment hydraulic valve power stations. A large number of tooling lifting, workstation switching, and workpiece clamping in the painting production line are driven by hydraulic systems. Solid particles in the oil are prone to scratch the valve core and inner wall of the oil cylinder, causing unstable equipment operation and leading to spraying positioning deviation, directly affecting the quality of the painted products. The filter element continuously filters impurities in the oil, maintains the cleanliness of the hydraulic oil, reduces the wear and failure rate of valve components and oil cylinders, prolongs the service life of hydraulic components, and reduces the frequency of equipment shutdown and maintenance. The filter element is easy to disassemble and replace, the maintenance cost is controllable, and it is suitable for the dusty on-site environment of the painting workshop. The filter specifications can be selected according to the flow rate and pressure of the hydraulic station, taking into account different installation positions for main circuit filtration, return oil filtration, and bypass filtration. Suitable for various automated coating production enterprises such as engineering machinery coating, rail transit component coating, tank coating, and hardware coating, it is an essential filtering and protective component for hydraulic systems in coating production lines.