JPS6034328Y2 - filter body - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in filter bodies.

Conventionally, in filter bodies that combine multiple furnace materials, pressure is applied to the back side of the furnace material on the fluid inflow side to reduce the pressure difference between both sides of the furnace material and increase the dust trapping efficiency. Although such methods have been proposed, since the filtration area of the outflow side furnace material cannot be made sufficiently large and the surface area is small, the furnace mouth must necessarily be made rough.

Even if the filtration efficiency could be improved by using the inlet furnace material, there is no guarantee that large particles of dust will not be mixed into the fluid (oil or air) passing through the bypass hole, and these large particles may It damages the rotating and sliding parts, causing seizure accidents and early wear, and is not suitable for applications where fluid that has passed through such a filter is directly supplied to each sliding part.

This invention was developed in response to these circumstances.
The object of the present invention is to completely eliminate the conventional drawbacks by simple and rational means, improve filtration efficiency and dust trapping efficiency, and provide a filter body with long life and high filtration performance.

To explain the details of the embodiment with reference to FIGS. 1 and 2, a dead protection cylinder 3 is attached between the centers of the upper and lower end plates 1 and 2, and a protection cylinder 3 made of a dense material such as filter paper is attached to the outer periphery of the protection cylinder 3.
Two pieces of chrysanthemum-shaped furnace materials 4 and 5 are arranged concentrically so that their plate surfaces do not overlap, and a large space 6 is formed between the two furnace materials 4 and 5.

As shown in FIG. 1, the fluid inflow side furnace material 5 is formed to be slightly lower or shorter than the outflow side furnace material 4, and a gap 7 is formed between the upper edge of this furnace material 5 and the upper end plate 1. , and the gap 7 is communicated with the space 6.

Further, the outer periphery of the end plate 1 on the side where the gap 7 is formed is pressed in stages, and a part of the upper end surface of the inlet side furnace material 5 is held by the lower end plate 1'.

8 in the figure is a band that also serves as a spacer.

Alternatively, as shown in FIG. 3, the end plate 1 facing the gap 7 may be used as is in the conventional manner without being press-worked to form a large gap.

Next, the details of another embodiment will be explained with reference to FIGS.
Two pieces of chrysanthemum-shaped furnace materials 4.5 made of a dense material such as door paper are arranged on the outer periphery of the dead guard cylinder 3 in a polymeric and concentric manner so as to interlock with each other, and between the two furnace materials 4 and 5. The space portion 6 is forcibly formed.

Then, as shown in FIG. 4, the fluid inflow side furnace material 5 is shaped to have a slightly lower height than the outflow side furnace material 4, that is, to have a shorter length, and between the upper edge of this furnace material 5 and the upper end plate 1. A gap 7 that can be configured is communicated with the space 6.

Also, a space 6 is forced between the inflow and outflow side furnace materials 4 and 5.
As a means for configuring this, as shown in FIG. A space 6 is formed between the tops of both the furnace materials 4 and 5 by determining the pleat length of the furnace materials in the opposite manner to that shown in FIG. 6, as shown in FIG.

Furthermore, as shown in FIGS. 8 and 9, a recess or a convex part 8 is formed on either the inflow side or the outflow side material, and this concave or convex part 8 creates a space between the furnace materials 4.5. 6.

In the above example, two furnace materials were polymerized, but three
More than one piece of furnace material may be provided in a polymerized manner. In this case, all the furnace materials other than the outflow side furnace material are made shorter than the outflow side furnace material, and the upper ends of these inflow side furnace materials and the upper end plate A gap 7 communicating with the space 6 is provided between the two.

Further, in each of the above embodiments, the gap 7 is formed between the upper edge of the inflow side furnace material 5 and the upper end plate, but on the contrary, the gap 7 is formed between the lower edge of the inflow side furnace material 5 and the lower end plate 2. Since the gap 7 may be formed between the two or above and below, the location of the gap 7 is not limited to that of the embodiment.

Next, to explain the filtration action of both of the above embodiments, the fluid passes through the surface of the inflow side furnace material 5 and a part of the fluid passes through the gap 7 into the space 6 between the furnace materials, and is further removed by the outflow side fencing material 4. Necessary dust is completely filtered and flows out from the protection cylinder 3, and fluid is supplied to the required locations.

At this time, by providing a gap 7 at the end of the furnace material 5 on the inflow side, the pressure difference between the inside and outside of the furnace material 5 is reduced, and this small pressure difference significantly improves the dust trapping performance. The fine dust deposited on the surface of the furnace material on the inlet side is further deposited, and even finer dust than the furnace mouth of the furnace material can be captured.

However, in this case, the filtration resistance of the furnace material gradually increases and the flow rate flowing through the furnace material decreases, but experiments using bypass filters have shown that, for example, in the case of engine lubricating oil, the amount of flow through the furnace material is 3 times the amount of oil flowing through the engine. If it is about %, the effect is sufficiently achieved.

Of course, in this case, the 3% oil must be extremely clean.

In this way, as the oil flow resistance of the inflow side furnace material 5 in the first stage increases, the amount of oil that passes through the gap 7 formed in the filter paper and reaches the outflow side furnace material 5 increases, but this state is normal. Due to the action of the single chrysanthemum folded type element, the accumulation of dust gradually increases, but the bypass filtration effect of the inflow side furnace material 5 significantly delays the clogging of the outflow side furnace material 4, resulting in a filter body with a long life and high filtration performance. can get.

As described above, according to the present invention, the inflow side furnace material has a bypass filtration effect, which has a large amount of dust trapping ability, and in addition, the outflow side furnace material has the same absolute filtration effect on the particles that need to be removed as the ordinary chrysanthemum folding type. It is possible to ensure high efficiency, high precision, and long life in the filter case.

Furthermore, since the gap formed in the inflow side furnace material is constructed by making this furnace material shorter than the outflow side furnace material, it is smaller than the gap formed by drilling small holes on the side of the furnace material. It has great practical effects as it is easy to process and saves on materials.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view, Fig. 2 is a transverse sectional view of the same as above, Fig. 3 is a longitudinal sectional front view of another example, Fig. 4 is a longitudinal sectional front view of yet another example, Fig. 5 is a plan view of the same as above, and Fig. 6 is a longitudinal sectional front view of another example. 9 are partially cutaway plan views of the furnace material. 1.2... End plate, 3... Dead guard cylinder, 4
, 5...Furnace material, 6...Space, 7...
...Gap area.

Claims (1)

[Scope of utility model registration request] When at least two chrysanthemum-shaped furnace materials are arranged concentrically around the outer periphery of a dead cylinder installed between the centers of the upper and lower end plates, the above-mentioned Among the furnace materials, the furnace material on the inflow side of the fluid is made shorter than the furnace material on the outflow side, and a gap is formed between the end of the inflow side furnace material and the end plate, and this is formed between the furnace materials. A filter body characterized by communicating with a space portion.