As the core power unit of modern industrial equipment, the stable operation of the hydraulic system depends on the cleanliness of the hydraulic oil. The hydraulic oil filter, as the "blood purifier" in the system, removes pollutants in the oil through the physical interception and adsorption mechanism to ensure the long-term operation of the hydraulic components. Its working principle can be divided into three core steps: multistage filtration structure: Liffert filters adopt a gradient filtration design, usually including a coarse filter layer, a fine filter layer and an adsorption layer. The coarse filter layer (such as metal mesh or fiber material) intercepts larger particles (≥100μm), the fine filter layer (high-precision filter paper or ceramic filter) captures small impurities (5-30μm), and the adsorption layer (activated carbon or magnetic material) removes colloids, moisture and metal particles. This layered design ensures a balanced filtration efficiency and flow rate, avoiding overloading of a single filter element. Differential pressure monitoring and automatic cleaning: When the accumulation of pollutants causes the differential pressure between the two sides of the filter to exceed the set threshold (such as 1.5-2.0 bar), the intelligent monitoring system triggers the cleaning mechanism. Some models use backwashing technology to wash the surface of the filter through the reverse oil flow, or use the vibration module to loosen the sediment to achieve online maintenance and extend the replacement cycle. Material adaptability: For different industrial scenarios, the selection of filter materials is targeted. For example, glass fiber reinforced filter paper is used in high temperature environments, 316L stainless steel filter element is used in corrosion resistant scenarios, sintered metal powder material is applied in extreme pressure conditions to ensure stability in the temperature range of -40 ° C to 120 ° C and pressure of 350 bar.
Technical advantages of Lifeldt hydraulic oil filters: Breaking through the traditional bottleneck innovation path As an industry benchmark, Lifeldt filters have achieved significant breakthroughs in filtration efficiency, durability and intelligence, and their advantages can be summarized into four dimensions: nanoscale filtration accuracy and low flow resistance balance: Self-developed "microfiber composite membrane" technology, through the 0.3μm aperture control, the impurity interception rate of 99.9%, while optimizing the fluid channel structure, so that the same accuracy of the pressure drop is reduced by 30% (compared with traditional filters). Experimental data show that under the flow rate of 500L/min, the pressure loss of filter element is maintained within 0.3 bar, which effectively reduces the pump energy consumption. Adaptive pollution Management system: Equipped with iot modules, real-time monitoring of oil cleanliness (ISO 4406), filter life and temperature parameters. When the pollution index exceeds the standard, the system automatically adjusts the cleaning frequency or early warning replacement, and some models can remotely transmit data to the cloud to support preventive maintenance decisions. For example, after applying this technology in a steel plant, the failure rate of the hydraulic system was reduced by 62% and the maintenance cost was reduced by 40%. Long life design and environmentally friendly materials: The "gradient wear compensation structure" is adopted, and the load is degraded step by step through the multi-layer filter element, so that the overall life is increased to 2-3 times that of traditional products. At the same time, some filter materials are made of degradable composite materials, which meet the EU RoHS environmental protection standards and reduce industrial waste pollution. Adaptability to extreme conditions: For aerospace, deep-sea equipment and other special scenarios, Liffelter has developed anti-radiation filter (10Gy dose tolerance), high-pressure pulse tolerance (500 bar pulse test without failure) and vacuum compatible (10^-3 Pa environment normal operation) products, expanding the application boundaries of hydraulic systems.
Application scenario analysis: The efficient performance of the hydraulic oil filter covers the whole field from the industrial cornerstone to the cutting-edge field, making it the core guarantee of multiple industries, typical application scenarios include: construction machinery and mining equipment: The hydraulic system of excavators and shield machines is in frequent contact with dust and water in harsh environments. The Lifeldt filter is designed with IP68 protection grade and automatic drainage valve, which ensures that the equipment can run continuously for 3000 hours without trouble under 90% humidity environment. Wind power and new energy fields: the hydraulic variable pitch system of wind turbines requires high precision control, and the 0.5μm filter precision filter effectively prevents the servo valve from sticking and improves the power generation efficiency by 5%-8%. At the same time, with the lubricating oil regeneration module, extend the service life of the oil to 3 years, reduce the cost of operation and maintenance. Aerospace and military equipment: Used in aircraft hydraulic landing gear and missile launch systems, the vibration resistance is tested by 20G acceleration to ensure reliable operation under extreme stress. The hydraulic oil pollution degree of a certain type of fighter jet is stable at NAS level 3 for a long time, which greatly improves the service life of the equipment. Metallurgical and chemical processes: In high temperature metal rolling (800 ° C) and corrosive media transport scenarios, the customized filter element is resistant to sulfur compound erosion, and the rapid change of interface design enables line maintenance within 2 minutes to avoid production interruptions
