JPS6020406Y2 - Structure of filter element - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a filter element suitable for use in a portion with a low flow rate, such as a bypass element.

Conventionally, this type of filter element has been used to perform interlayer filtration.

One conventional example is shown schematically in Figure 1, in which two wave bodies 1 made by winding filter paper into a roll are attached coaxially with a spacer 2 interposed between them. It is.

That is, oil is supplied from the outer end surface 3 of each wave body 1, and the wave body 1
The oil is passed between the layers and then drained into the central passage 4 by means of a spacer 2.

Although this type of filter has no particular problems in terms of the filtering function itself, it has drawbacks such as the need to use two crossing bodies 1 and the need for a spacer 2 with a special structure.

In other words, even though the wave body 1 is small in shape,
It must be used as a single unit, including end plates, etc.

The purpose of this invention is to obtain a structure of a filter element that can perform sufficient interlayer filtration with one element.

This idea created a large number of holes in a part of the corrugated body made of filter paper wound in a roll, and also made holes for oil passage in the cylinder, so that the oil that was supplied from the end face and filtered between the layers was The oil flows out into the inner cylinder through the hole and the oil passage hole at the part, so that the same function as the conventional two-piece set can be obtained by just providing one corrugated body. It is composed of

An embodiment of this invention will be explained based on FIGS. 2 and 3.

First, there is an outer cylinder 5 with no oil permeability and a large number of oil permeable holes 6 in the center.
A long filter paper 8 with a predetermined width is placed between the inner cylinder 7 and the
A corrugated body 9, which is wound into a roll, is attached.

A large number of holes 10 are formed in the portions of the filter paper 8 that coincide with the oil passage openings 6, and when the filter paper 8 is wound as a corrugated body 9, the oil passage portions 11 through which oil passes in the stacking direction are formed. There is.

Then, the peripheral edge 12 is fixed to the outer cylinder 5, and the crossing body 9
An end plate 16 is provided, which is connected to the end surface 13 of the inner cylinder 7 through an oil-permeable spacer 14, and connected to the inner cylinder 7 through a seal backing 15.

A backing 1 having an opening 17 in the center of this end plate 16
8 is attached, and a wire mesh-like oil passage portion 19 is provided at a position corresponding to the spacer 14.

In such a configuration, since oil is supplied from the end plate 16 side, interlayer filtration is performed in the corrugated body 9 portion.

Then, in the oil passing portion 11 formed by the hole 10, the flow changes in the centripetal direction with relatively small resistance, and reaches the inside of the inner cylinder 7 via the oil passing hole 6.

Therefore, interlayer filtration is performed using one wave body 9,
Moreover, it becomes possible to discharge the filtered oil into the interior of the inner cylinder 7.

Therefore, the number of parts is small and the workability during installation is low.

In practice, the filter paper 8 may be wound to form a corrugated body 9, and then a large number of holes 10 may be formed through the center of the wave body 9.

This idea holds the corrugated body with the outer cylinder, the inner cylinder and the end plate as described above, forms an oil passage hole in a part of the inner cylinder, and makes the wave body almost coincident with the oil passage hole. Since holes are formed in the body, interlayer filtration can be performed between these holes and the end face, and oil can be drained into the inner cylinder through communication between the holes and the oil passage hole. Oil can be supplied from both end faces of the body and filtered between layers using a single corrugated body, and the structure is simple, the number of parts is small, and the workability during replacement is extremely high. It is something.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a conventional example, FIG. 2 is a partially cutaway side view showing an embodiment of this invention, and FIG. 3 is a partially developed view of a filter paper. 5...Outer cylinder, 6...Oil hole, 7...
... Inner tube, 8 ... Filter paper, 9 ... Wave body, 10 ... Curved hole, 16 ... Curved end plate.

Claims (1)

[Scope of utility model registration request] A corrugated body made of long filter paper wound in a roll is installed between the outer cylinder, which is not oil-permeable, and the inner cylinder, which has some oil-permeable holes. A structure of a filter element, characterized in that an end plate is attached and a number of holes are formed in the corrugated body, the positions of which are approximately aligned with the oil passage holes.