Novel filter assembly

Abstract

The invention provides a novel filter assembly comprising a flange, an oil pipe and a filter screen in press fit with the oil pipe, wherein the press fit part of the oil pipe and the filter screen is noncircular. The invention can avoid the rotating and the falling off of the filter screen rotates under then condition that installing is not influenced.

Description

technical field [0001] The present invention generally relates to a filter assembly, and more particularly relates to a novel diesel engine filter assembly. Background technique [0002] figure 1 It is a schematic diagram of the structure of the filter assembly of the prior art. Such as figure 1 As shown, the filter assembly includes a flange 1, an oil pipe 2 and a filter screen 3. [0003] The structure of the diesel engine filter assembly in the prior art is that the circular filter screen 3 is press-fitted on the oil pipe 2 after the pipe fittings have been flared, and then welded with the flange 1 . [0004] figure 2 yes figure 1 The cross-sectional view of the filter assembly in the direction A-A. It should be noted that figure 2 The cross-sectional view of FIG. 2 only shows the parts related to the press joint of the oil pipe 2 and the filter screen 3, while omitting other parts that are not very relevant. Such as figure 2 As shown, the shape of the joint b...

AI Technical Summary

Problems solved by technology

From the principle of six-point positioning, this circular structure is difficult to limit the degree of freedom of rotation

Therefore, this structure often loses the screen due to the rotation of the filter screen 3 during use, resulting in poor oil filtration quality.

[0005] In addition, due to the low rigidity of the filter screen 3, the filter screen 3 will appear concave and loose after being riveted with the oil pipe 2

[0006] At the same time, limited by the flaring diameter (the national standard stipulates that the flaring diameter of the pipe should not exceed 15% of the pipe diameter, otherwise flaring and cracking will occur), the effective area of ​​the filter is relatively small, resulting in a relatively small oil pipe flow rate. As a result, the oil suction flow is relatively insufficient

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