The core reason for using hydraulic filters in hydraulic systems is that they can intercept and remove impurities from the oil, ensuring stable system operation and extending component life. The following is a comprehensive analysis of the specific reasons:
1、 Prevent pollution and protect components
Impurities come from a wide range of sources: Impurities in hydraulic systems include mechanical impurities (such as iron filings and welding slag) that remain after cleaning, dust that enters from the outside, as well as metal powder and seal fragments generated during operation. These impurities will circulate with the oil and enter the gaps of precision components, causing blockages, scratches, or jamming. For example, a clogged throttle hole may cause system failure.
Key component protection: Core components such as hydraulic pumps and valves require extremely high oil cleanliness. Filters can significantly reduce the risk of wear and failure caused by pollution by intercepting impurities, thereby extending the lifespan of components. According to statistics, about 75% of hydraulic system failures are caused by oil contamination.
2、 Maintain system efficiency and performance
Reduce internal leakage: Impurities can damage the oil film between moving parts, exacerbate wear and increase internal leakage, and reduce system efficiency. Filters help maintain the integrity of the oil film by keeping the oil clean, reducing energy loss and heat generation.
Optimizing response speed: Pure hydraulic oil can reduce pump load fluctuations and improve system dynamic response capabilities, especially in high-precision control scenarios.
3、 Improve system reliability
Preventing sudden malfunctions: Unfiltered impurities may cause the overflow valve to malfunction or the filter element to collapse, while filters equipped with alarm devices can promptly prompt the replacement of the filter element to avoid unexpected shutdowns
Application of independent filtration system: Large equipment often uses bypass filtration system to continuously purify oil, further improve cleanliness, and enhance long-term stability.
4、 Extend the overall lifespan of the equipment
Reduce maintenance costs: The cost of regularly replacing or cleaning filter cartridges is much lower than the cost of frequent maintenance or replacement of damaged components.
Inhibit chemical deterioration: Filters can also filter out harmful substances such as gum and asphaltene generated by oxidation, delay the oil degradation cycle, and reduce the frequency of oil changes.
In short, the selection of hydraulic filters should be based on the installation location (such as suction port, return oil circuit) and accuracy level to meet the requirements of different working conditions.
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