The structure principle of diesel filter mainly includes the following aspects:
1. ** Filter element **
- ** Material and structure ** : The filter element is the core component of the diesel filter, usually made of fiber materials, such as filter paper, felt or polymer materials. These materials have good filtration performance and certain mechanical strength, which can effectively block impurities in diesel. The inside of the filter element is specially designed with multi-level filter structure to increase the filtration area and improve the filtration efficiency.
- ** Filter principle ** : When the diesel through the filter element, the solid particles, impurities, etc. are blocked by the fiber material of the filter element in the outer surface or internal pores, and the clean diesel can smoothly through the filter element into the next link. This type of filtration is a physical filtration, which can effectively remove most of the impurities in diesel.
2. ** Filter shell **
- ** Support and protection ** : The filter shell is the support and protection shell of the filter element, usually made of metal or plastic materials. Its main function is to provide stable support for the filter element to ensure that the filter element will not be deformed or damaged during the working process. At the same time, the filter shell also plays a sealing role to prevent diesel leakage.
- ** Import and Export Channels ** : The filter housing is provided with import and export channels for the inflow and outflow of diesel oil. The inlet channel is connected to the oil pipeline of the fuel system, and the diesel oil containing impurities is introduced into the filter; The outlet channel delivers clean filtered diesel to the engine's fuel system.
3. ** Valve **
- ** Control flow ** : The diesel filter is equipped with some valves to control the flow and direction of the diesel. The most common of these are inlet valves and drain valves. The inlet valve is used to control the entry speed of diesel oil to avoid the impact on the filter element due to excessive flow and affect the filtration effect. The drain valve is used to remove the moisture and impurities accumulated inside the filter element to keep the filter element clean and normal operation.
- ** Prevent backflow ** : Some diesel filters are also equipped with an anti-backflow device, which is used to prevent the diesel in the fuel system from backflowing back to the filter when the engine stops running, avoid the filter element from being damaged by the impact of reverse pressure, and also ensure the cleanliness of the fuel when the next start.
In general, the diesel filter through the physical filtration of the filter element, the support protection of the filter shell, the flow control of the valve and the prevention of backflow and other functions, jointly realize the effective filtration of impurities and water in the diesel, provide clean fuel for the engine, and ensure the normal operation and service life of the engine.