JPH0522015U - Oil filter - Google Patents

Abstract

(57) [Abstract] [Purpose] A magnetic cylindrical body having a large number of openings directed in the tangential direction is arranged inside the filter body of an oil filter, and a magnetic annular body having an annular inclined portion is further provided. The iron powder inside is brought into contact with the magnetic adsorption surface over a wide area, and centrifugal force is applied to the iron powder by a swirling flow to facilitate adsorption, thereby completely trapping the iron powder. [Structure] Inside the filter body 7 of the oil filter 1, a magnetic cylindrical body 14 in which a vertical wall 15 is formed with a tangential opening 17 by a guide wall 16 is arranged. Further, a magnetic annular body 18 having an annular inclined portion 19 and a cylindrical portion 20 is provided below the vertical hole 15. Therefore, the iron powder in the oil is sucked and captured by the outer surface of the magnetic cylindrical body, the inner surface that becomes the swirling flow, and the wide inclined surface by the annular inclined portion. Therefore, the capture rate is high, and wear of the sliding portion due to iron powder is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an oil filter for an internal combustion engine.

[0002]

[Prior Art]

 Conventionally, there is a method in which a magnet is built in an oil filter and fine iron powder in the oil is attached to remove it. This is because even fine iron powder that is not captured by the filter may damage the sliding surface, hinder the formation of an oil film, and accelerate wear.

For example, in the oil filter disclosed in Japanese Utility Model Laid-Open No. 60-124616, a magnet body is attached to the outer surface of the cylindrical portion that serves as an oil outlet, that is, to the oil inflow path. The oil strainer disclosed in Japanese Utility Model Laid-Open No. 56-2916 is provided with a linear permanent magnet in a coil shape around the outer cylindrical surface of the strainer on the upstream side of the oil suction, or an annular permanent magnet. The magnets are arranged so as to overlap at appropriate intervals.

[0004]

[Problems to be solved by the device]

 In the conventional oil filter as described above, a linear or lumped magnet is arranged on the upstream side of the filter body so as to face the oil flow path, but the space forming the oil flow path is extremely small. It only contacts a small part of it, and most of the inflowing oil passes through without being affected by the iron powder adsorbed by the magnet. Also, if a magnet is placed on the upstream side of the filter body, a relatively large amount of iron powder that is trapped by the filter body will also be adsorbed, the amount of deposition will increase, and the subsequent iron powder adsorption force will weaken. .. Further, fine rust or the like generated on the inner wall of the container or the end plate of the filter element will flow out to the sliding portion.

[0005]

[Means for Solving the Problems]

 Inside the container, an annular tubular filter body that allows oil to flow downward from the outside to the inside is made of a cylindrical magnetic material. A magnetic cylindrical body with a tangential direction opening formed in the vertical hole is provided, and a circular inclined portion and a cylindrical portion rising upward from the inner peripheral edge are formed below the vertical hole on the inner surface of the magnetic cylindrical body. Provide a magnetic ring that has magnetism.

[0006]

[Action]

 The oil flows through the filter body from the outside to the inside and is filtered. The fine iron powder that has passed through the filter collides with the filtered oil in the radial direction on the outer surface of the magnetic cylinder. Here, the primary adsorption of iron powder is performed. Next, the oil becomes a swirling flow along the inner surface of the magnetic cylindrical body according to the opening direction of the vertical hole. Here, the iron powder remaining in the oil is given a centrifugal force to approach the inner surface of the magnetic cylindrical body, and is attracted by the magnetic force to perform the secondary iron powder adsorption. The oil swirls and descends to flow out of the outlet, but the iron powder that has swirled and descended without being adsorbed by the secondary iron powder adsorbs the annular slanted portion and cylindrical portion of the magnetic annular body. It descends into the pocket and receives and is trapped by the third iron powder adsorption. Therefore, the iron powder that goes to the outlet together with the oil is substantially absent. If the iron powder deposited by the secondary adsorption of iron powder falls off, it will be caught and stored in the pocket part of the magnetic annular body and will not flow over the cylindrical part.

[0007]

【Example】

 In the disposable oil filter 1 shown in FIG. 1, the open end of a cup-shaped body 2 is closed with a cover plate 3 provided with an oil inlet 4 and an oil outlet 5 to form a container, and a filter element 6 is provided inside. It was housed. The filter element 6 comprises an annular tubular filter body 7 made of filter paper folded in a chrysanthemum shape, upper and lower end plates 8 and 9, and a porous inner tube 10. In the figure, reference numeral 11 is a mounting seal packing, 12 is a rubber check valve and seal packing, and 13 is a leaf spring.

A cylindrical magnetic cylindrical body 14 made of a magnetic synthetic resin plate is provided inside the filter body 7 and the inner tube 10. As shown in FIGS. 2 and 3, the magnetic cylindrical body 14 has a large number of vertical holes 15 cut into slits. The opening 17 of the vertical hole 15 is oriented tangentially by bulging the wall surface on one side of the vertical hole 15 inward to form a louver-shaped guide wall 16.

A magnetic annular body 18 made of a magnetic synthetic resin is provided below the vertical hole 15 on the inner surface of the magnetic cylindrical body 14. The magnetic annular body 18 includes an annular inclined portion 19 that is inclined inward and upward from the inner surface of the magnetic cylindrical body 14, and a cylindrical portion 20 that rises upward from the inner peripheral edge thereof.

The oil passes from the inflow port 4 through the filter body 7 of the filter element 6 from the outside to the inside and is filtered, and the iron powder passing through the filter body 7 swirls on the outer surface of the magnetic cylindrical body 14 on the primary and inner surfaces On the other hand, the secondary adsorption is received and captured, and the one further lowered is subjected to the tertiary adsorption by the annular inclined portion 19 of the magnetic annular body 18 and captured. When the iron powder deposited by the secondary adsorption falls off, it is received and accumulated in the pocket portion 21 of the magnetic annular body 18.

Like the magnetic annular body 25 shown in FIG. 4, the annular inclined portion 26 has a shape inclined downward inward of the magnetic cylindrical body 14, the cylindrical portion 27 is provided on the inner peripheral edge, and the pocket portion 28 is formed. It may be formed.

The magnetic cylindrical body and the magnetic annular body may be made of iron permanent magnets, and may be made of any material as long as they have magnetism and can adsorb iron powder. Further, the magnetic cylindrical body may also serve as the inner tube of the filter element. Further, the present invention can be applied to not only the disposable oil filter shown in FIG. 1 but also a center bolt type oil filter. In the case of the disposable type, the iron powder accommodating capacity of the pocket part should be provided to correspond to the clogging life of the filter body, but in the case of the center bolt type, remove the iron powder adsorbed and scrape it off and use it repeatedly. Is also possible.

[0013]

[Effect of the device]

 Since the oil filter of this invention adsorbs iron powder in the final stage of filtration inside the filter body, iron powder such as iron generated in the oil filter is trapped and does not flow out to the sliding portion. In addition, the contact area of the adsorption surface with oil is made extremely wide on the outer surface and inner surface of the cylindrical body and the inclined surface of the annular body, and a swirl flow is generated in the oil to impart centrifugal force to the iron powder and direct it toward the adsorption surface. As a result, the capture rate of iron powder becomes extremely high. Further, since the magnetic body is provided inside the filter body, the large iron powder is trapped by the filter body, and the burden on the magnetic body is reduced, and the decrease in suction due to the iron powder deposition is reduced. In addition, iron powder, etc. generated on the end plates of the filter element will be prevented from flowing out at the final stage.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is a sectional view of a main part taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of main parts taken along the line BB in FIG.

FIG. 4 is a sectional view of an essential part showing another example of the magnetic annular body.

[Explanation of symbols]

 4 Inlet 5 Outlet 7 Filter 14 Magnetic cylinder 15 Vertical hole 17 Opening 18 25 Magnetic annular body 19 26 Annular inclined part 20 27 Cylindrical part

Claims (1)

[Scope of utility model registration request] 1. An oil filter in which a container accommodating an annular tubular filter body is provided with an inflow port communicating with the outer side of the filter body and an outflow port communicating with the inner side of the filter body and located below the filter body. A magnetic cylindrical body made of a magnetic material, in which a large number of vertical holes are provided on a cylindrical wall surface, one wall surface of each vertical hole is bulged inward of the cylinder, and a tangentially-oriented opening is formed in the vertical hole, Arranged inside the filter body, below the vertical hole on the inner surface of the magnetic cylinder,
An oil filter provided with a magnetic annular body including an annular inclined portion and a cylindrical portion rising from the inner peripheral edge thereof.