What is the filter element of a hydraulic system?

In a hydraulic system, the filter element is a crucial component used to remove impurities and contaminants from the hydraulic fluid. Here is a detailed introduction:

Structure and Material:

Structure: It usually consists of a framework and a filtering medium. The framework provides support and protection for the filtering medium, while the filtering medium is the core part for filtering impurities.

Material: Common materials for filter elements include metal meshes, non - woven fabrics, paper - based materials, and sintered metal powders. Different materials have different filtering precisions and performances, and are selected according to the specific requirements of the hydraulic system. For example, metal mesh filter elements have high strength and can be reused after cleaning, while paper - based filter elements have high filtering precision but are usually disposable.

Working Principle:

The filter element works based on the principle of mechanical filtration. As the hydraulic fluid flows through the filter element, the filtering medium blocks and traps impurities such as dirt, metal particles, and oxide flakes in the fluid. The size of the pores in the filtering medium determines the filtering precision of the filter element. The smaller the pore size, the higher the filtering precision, and the smaller the impurities that can be removed from the hydraulic fluid.

Function and Importance:

Maintaining Fluid Cleanliness: The cleanliness of the hydraulic fluid has a significant impact on the performance and service life of the hydraulic system. By removing impurities, the filter element helps maintain the cleanliness of the hydraulic fluid, preventing contaminants from entering components such as pumps, valves, and cylinders, which can cause wear, clogging, and malfunctions.

Protecting System Components: It serves as a safeguard for the various components in the hydraulic system. Clean hydraulic fluid ensures smooth operation of the components, reduces friction, and extends the service life of the components. This helps to improve the reliability and stability of the entire hydraulic system, reducing the occurrence of failures and maintenance costs.

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