The oil filter is located in the engine lubrication system. Its upstream is the oil pump, and downstream is the various parts in the engine that need to be lubricated. Its function is to filter the harmful impurities in the oil from the oil pan, and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving pairs with clean oil, which plays the role of lubrication, cooling and cleaning. Extend the life of these components.
Before the 1980s, most of the oil filters used in Chinese engines were replaceable. The filter of this structure is to put the filter element and other parts, such as springs, sealing rings, etc., into a metal shell, and connect the shell filter element and the like to a metal filter seat through a pull rod.
Its advantage is that the cost of use is low, and it only needs regular maintenance and replacement of the filter element. The disadvantage is that there are too many sealing points, and the maintenance and replacement of the filter element may miss parts, which is easy to cause loopholes, and the replacement is troublesome.
Since the early 1980s, Bengbu Filter Factory was the first in China to introduce spin-on filter production lines from Italy, and spin-on filters have gradually been approved and selected by domestic OEMs. The characteristics of this filter are that it is equipped with a check valve, a bypass valve, and only one sealing point. It can be replaced as a whole, which greatly improves the sealing performance and is easy to replace. The filter element material is mostly imported filter paper, so the filtration efficiency is high. Small flow resistance and long life.
At present, all domestic cars use the oil filter of this structure. filter.
The spin-on oil filter is a closed shell with an oil inlet and an oil outlet, and is equipped with a paper filter element. The upper and lower ends of the paper filter element are respectively glued with upper and lower end caps. Between the upper and lower end caps, there is a porous center tube to support the paper filter element to prevent the paper filter element from being deformed when the oil pressure is large. In the meantime, there is an oil outlet in the middle of the upper end cover, and the oil inlet is around the upper end cover. An oil check valve is arranged between the holes, a bypass valve is arranged on the lower end cover, and a support spring is arranged between the lower end cover and the filter housing. The oil outlet is tightly connected with the oil outlet on the filter housing.
The paper filter element is set up to filter out harmful impurities in the oil by using the densely covered micropores around it; the bypass valve is used to prevent the engine from being dry due to lack of oil when the viscosity of the engine oil is high or the paper filter element is blocked by impurities. The friction can make the oil circulate back to the engine without passing through the paper filter element. set up.
How does a spin-on oil filter work? When in use, the oil first enters the outer cavity of the paper filter element in the filter housing through the oil inlet under the action of the oil pump, and then passes through the paper filter element to filter out the harmful impurities in the oil through the micropores of the paper filter element, and the relatively clean oil enters the paper filter element. The center pipe in the filter element, and then the center pipe flows through the oil outlet and circulates back to the engine to complete a cycle.
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Post time: Apr-27-2022