Filter element assembly of fuel filter

Abstract

The invention discloses a filter element assembly of a fuel filter. A filter paper layer of the filter element assembly is arranged on a framework in a sleeving mode, and an upper end cover and a lower end cover are arranged at the upper end and the lower end of the filter paper layer; and a drainage net is inserted in the center of the framework, the top end of the drainage net is fixed to the upper end cover in a bonding mode, and an upper end opening of the drainage net is turned outwards in the radial direction to form a horizontal first turning edge. According to the filter element assembly, the first turning edge of the drainage net is turned out horizontally, the annular contact area between the drainage net and the upper end cover is increased, the drainage net and the upper end cover are bonded more firmly, and the drainage net is not prone to falling off from the upper end cover.

Description

technical field [0001] The invention relates to the technical field of fuel filters for vehicles, in particular to a filter element assembly of a fuel filter. Background technique [0002] The fuel pre-filter is set in the engine fuel supply system, and is used to filter out impurities, water and other pollutants in the fuel, and then input it into the fuel delivery pump and fuel injector, so as to avoid excessive wear and tear of important parts such as fuel delivery pump and fuel injector. More or blockage and other problems to ensure the normal operation of the engine. [0003] The existing fuel filter with electric pump has the following problems: [0004] (1) The filter element assembly of the fuel filter is usually placed in the casing as a whole, and then the casing is screwed onto the base through thread fit. At this time, the upper end of the filter element assembly is inserted into the central channel of the base; Assembly method, the assembly accuracy between th...

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Problems solved by technology

[0004] (1) The filter element assembly of the fuel filter is usually placed in the casing as a whole, and then the casing is screwed onto the base through thread fit. At this time, the upper end of the filter element assembly is inserted into the central channel of the base; Assembly method, the assembly accuracy between the filter element assembly and the base needs to be determined indirectly through the assembly accuracy between the shell and the base, that is, it is first necessary to ensure a high assembly accuracy between the filter element assembly and the shell, in order to ensure that the shell is assembled to When it is on the base, the upper end of the filter element assembly can be accurately inserted into the central channel of the base. If the assembly between the assembled filter element assembly and the shell is out of tolerance, it will affect the subsequent assembly and maintenance between the shell, filter element assembly and the base. Coordination, this method puts forward higher requirements on the assembly accuracy between the filter element assembly and the shell, which increases the difficulty of the assembly process; The requirements are high, that is, the filter element assembly is closely matched with the shell, and the filter element assembly is basically placed in the shell as a whole. When disassembling and replacing the filter element assembly, it is difficult to take the filter element assembly out of the shell. The labor and time are more, and the labor cost and time cost are higher

[0005] (2) The hydrophobic net of the filter element assembly is usually glued to the bottom surface of the upper end cover, and the contact area between the hydrophobic net and the upper end cover is only a circular top surface of the hydrophobic net, and the width of the ring is the top of the hydrophobic net. The wall thickness value of the surface, and the thickness of the hydrophobic mesh is usually small, so the contact area between the hydrophobic mesh and the upper end cover is small, the bonding firmness is poor, and the hydrophobic mesh is easy to fall off from the upper end cover

The central tube of the filter element assembly is inserted in the center of the hydrophobic net, and the ends of the two have a certain fit gap. The central tube is prone to skewing, which affects the uniformity of the gap between the central tube and the hydrophobic net, and then affects the oil-water separation of the hydrophobic net. efficiency

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