Diesel filtration system diagram
Diesel filter composition
The diesel filter mainly consists of a hand oil pump (filter seat), a filter component, a water level sensor, a temperature sensor, a heater, a sealing ring, a pipe joint, and the like, wherein the filter core member is a filter element, see a structural drawing.
Filter cleaning method and working principle
(1) Screening effect
When the fluid passes through the porous body, the impurity particles of the particle size in the fluid are intercepted by the porous body on the surface; the particles having smaller diameter particles than the porous body pass through the porous body with the fluid.
The screening effect is the basic principle of the filter. The general wire mesh filter and surface filter are filtered according to the screening effect. Since the pore diameter of the filter medium and the diameter of the impurity particles are not round, they are equivalent pore diameters and equivalent particle diameters. Therefore, the particle size it intercepts is much smaller than the pore size of the filter material.
(2) Brownian motion
The phenomenon that the suspended particles continuously move irregularly is called Brownian motion) and the aggregation of the particles and the impurity particles in the adhering fluid make irregular Brownian motion all the time, and are adhered and retained when moving to the pore wall of the porous body. In a small area on the wall of the hole, it is filtered out by the porous body.
Impurity particles may also collide with each other due to Brownian motion and liquid vibration, and the apparent diameter of the particles gradually increases under the surface bonding force. It is well known that the surface energy of a particle increases as the particle size decreases (inverse relationship) and is proportional to the square root of the contact area between the particles, so that minute particles are easily aggregated and are not easily dispersed.
(3) Separation of “affinity” and “distance” effects of media (such as oil and water) using filter media
When the oil flow with tiny water droplets enters a kind of “pro-oil” oil “sparse” water filter material (such as microporous filter paper with resin content of 27~32%), due to the “affinity” of the filter material to the oil The oil flow smoothly passes through the micropores of the filter material; due to the “distance” of the filter material to water, tiny water droplets cannot smoothly pass through the micropores of the filter material. Due to the wetting effect of tiny water droplets on the filter paper fluff, tiny water droplets are retained on the fluff of the filter paper. The tiny water droplets that are intercepted gradually increase, causing them to gradually coalesce into large water droplets. Under the action of oil pressure, the water droplets are pressed against the wedge-shaped passage of the filter element to form larger water droplets. Under the action of oil pressure, after the water droplets pass through the filter material, they will settle down and fall into the water collecting cup under the action of their own mass.
The most widely used one is to separate the water from the fuel. The better the “sparse” performance of the filter material, the better the effect of separating the water.
Post time: Nov-16-2018