JPH07317526A - Oil mist separator/collector - Google Patents

Abstract

PURPOSE:To provide an oil mist separator/collector not preventing passage of gas even when its filter member clogs. CONSTITUTION:This oil mist separator/collector has a cylindrical container 10. The container comprises an upper part 11 combined with a lower part 12, and a filter member 20 interposed between them separates the container inside into an upper chamber and a lower chamber. The filter member 20 is formed piling up an upper filter plate, a spacer, and a lower filter plate. Each of the upper and lower filter plate has each auxiliary vent hole. The spacer comprises a big ring part and a small ring part which are arranged concentrically and jointed together by a supporting part. Both of the auxiliary vent holes are formed by sandwiching the supporting part. When the filter plate clogs due to slugs or the like, the auxiliary vent holes pass gas to suppress the increase of pressure loss.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil mist separating / collecting apparatus, and more particularly to a small and lightweight suitable for separating and collecting oil mist contained in blow-by gas accumulated in a crank chamber of an engine for vehicles such as automobiles. The present invention relates to an oil mist separation / collection device.

[0002]

2. Description of the Related Art Heretofore, as an oil mist separating and collecting apparatus of this type, as shown in, for example, Japanese Utility Model Publication No. 59-206610, an oil mist installed in a part of a blow-by gas recirculation pipe of an automobile engine is known. Separation and collection device (oil trapper) was known. As shown in FIG. 4, this oil mist separating / collecting device 1 forms a zigzag path 4 by providing a plurality of partition plates 3 on the inner lower side of a cylindrical casing 2 and forms a mesh-like shape on the inner upper side of the casing. A filter (oil strainer) 5 was provided. Then, by applying blow-by gas to the partition plate 3, a part of the oil mist having a large particle size is mainly condensed on the partition plate 3, and the oil mist having a small particle size that cannot be removed by the partition plate 3 is finely filtered. It was supposed to be removed by 5.

[0003]

However, in the above-described oil mist separation / collection device, since the density of the filter is increased in order to improve the recovery efficiency of the oil mist having a small particle size, sludge due to deterioration of oil or the like causes There is a problem that the filter is clogged, and water in the gas is frozen and clogged in the filter in the winter when the outside temperature is low. Due to such clogging of the filter, the pressure loss becomes very large, the pressure inside the engine increases, and the plug of the oil level gauge may fly off, or there may be problems such as oil leakage from the seal part. It was The present invention is intended to solve the above problems, and an object of the present invention is to provide an oil mist separation / collection device that does not prevent passage of gas mixed with oil mist due to clogging of a filter.

[0004]

In order to achieve the above object, the structural feature of the invention according to claim 1 is that it is attached to an inner surface of a container having a gas inlet and a gas outlet on an outer wall. In an oil mist separation / collection device provided with a filter member that divides the space inside the container into a gas inflow space following the gas inflow port and a gas outflow space following the gas outflow port, a plurality of filter plates are provided at predetermined intervals as filter members. And at least one auxiliary vent hole is provided at a different position of each filter plate.

Further, the structural feature of the invention according to claim 2 is that in the oil mist separating and collecting apparatus according to claim 1, the auxiliary passage is provided by partitioning a space between the filter plates between the filter plates. The reason is that a partition member is provided to increase the distance between the pores.

[0006]

In the invention according to claim 1 configured as described above, the distance between the auxiliary vent holes provided in each filter plate is large, which is significantly longer than the distance between the filter plates. Therefore, in the normal case where the filter is not clogged, a small amount of gas passes between the auxiliary vent holes, and therefore, the oil mist removing ability of the filter is slightly reduced. When the filter is clogged due to sludge in the oil mist, the gas flows from the auxiliary vent hole of the first filter plate into the space between the second filter plate and the second filter plate. By passing through the auxiliary ventilation hole provided in the filter plate, it is possible to prevent the pressure loss from becoming larger than a predetermined value. Even when three or more filter plates are provided, the gas passes in the same manner as above. As a result, a large pressure loss does not occur in the oil mist separation / collection device, so that the internal pressure of the engine or the like connected to the gas inlet is not increased, and problems such as oil leakage from the seal portion etc. occur. Does not occur.

Further, in the invention according to claim 2 configured as described above, since the space is partitioned by the partition plate, the distance between the auxiliary vent holes can be increased, so that the filter is not clogged. Under normal conditions,
Very little gas flow between the vents,
The oil mist removing ability of the filter is hardly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of an oil mist separating and collecting apparatus for an automobile engine according to the embodiment. . This oil mist separation / collection device is provided with a cylindrical container 10. As shown in FIG. 1, the container 10 is divided into an upper portion 11 and a lower portion 12, and a flange portion 11 a provided at the lower end of the upper portion 11 and a flange portion 12 a provided at the upper end of the lower portion 12 a. It becomes one by joining and. A gas outlet 11c is provided at the center of the upper wall 11b of the upper portion 11, and a gas outlet pipe 13 is connected to the gas outlet 11c. The bottom wall 12b of the lower side portion 12 is
It has a funnel shape for allowing the removed oil to flow downward, and a gas inlet 12c is provided at the center thereof, and a gas inlet pipe 14 is connected to the gas inlet 12c. Further, two arcuate partition plates 15 having an area larger than a semicircle are alternately attached to the inner peripheral surface of the lower side portion 12.

The upper part 11 and the lower part 1 of the container 10
The filter member 20 is attached to the joint portion of the two flanges 1
It is arranged so as to be sandwiched between 1a and 12a. As shown in FIG. 2, the filter member 20 is provided with an upper filter plate 21, a lower filter plate 22, and a spacer 23 sandwiched between them. The upper filter plate 21 and the lower filter plate 22 have a thickness of 0.
60m with 1mmφ micro holes 21a and 22a on the entire surface
It is a thin metal plate of mφ, and has 10 mmφ auxiliary vent holes 21b and 22b provided at the periphery. Spacer 23
Is made of aluminum and has an outer diameter of 60 m, as shown in FIG.
A large ring portion 23a having an mφ and a small ring portion 23b having an outer diameter of 30 mmφ are arranged in concentric circles, and they are connected at a single location by a rod-shaped support portion 23c, which are integrally formed by a press or the like. . The upper and lower filter plates 2
The diameters and arrangement densities of the minute holes 21a and 22a of 1 and 22 can be appropriately selected according to the purpose and application, and also regarding the diameter and number and the arrangement position of the auxiliary ventilation holes 21b and 22b.
It can be appropriately selected and implemented. The shape of the spacer 23 is not limited to the ring shape, and may be a straight line, a curved line, or a combination thereof.

In a state where the auxiliary vent hole 21b of the upper filter plate 21 and the auxiliary vent hole 22b of the lower filter plate 22 are arranged on opposite sides with the support portion 23c of the spacer 23 interposed therebetween, the upper filter plate 21 and the spacer 23 are separated from each other. The filter member 20 is obtained by stacking and fixing the lower filter plate 22. By providing the filter member 20 in the container 10, the inside of the container 10 is separated into the upper chamber R1 and the lower chamber R2. The inside of the lower chamber R2 is the partition plate 15
Are separated by a zigzag path.

Next, the operation of the embodiment constructed as described above will be explained. First, when the gas mixed with the oil mist flows into the oil mist separating and collecting apparatus through the gas inflow pipe 14, first, in the lower chamber R2. By hitting the partition plate 15, part of the oil mist adheres to the partition plate 15 and is removed from the gas. These removed oil components flow down through the gas inflow pipe 14 and are collected. Further, the gas flows into the filter member 20, but when the filter member 20 is in a normal state without being clogged at this time, as shown by a line A in FIG. 3, the lower filter plate is straightened upward. After passing through 22 and the upper filter plate 21, the particles in the oil mist are efficiently removed by the upper and lower filter plates 21 and 22.

Then, the insides of the upper and lower filter plates 21 and 22 are clogged by sludge in the oil mist, or the upper and lower filter plates 21 and 22 are clogged due to the freezing of water in the gas in the winter when the outside temperature is low. When occurs,
As shown in FIG. 3, gas flows from the auxiliary vent hole 22b of the lower filter plate 22 into the space of the spacer 23, and passes through the route shown by the line B to the auxiliary vent hole 21b outlet of the upper filter plate 21 to the upper space R1. It enters and flows out from the gas outflow pipe 13. In addition, the upper and lower filter plates 21 and 2 may be slid or the like.
When one of the two is clogged, the gas passes through the auxiliary vent hole only for the clogged filter plate.
Therefore, even if the filter plates 21 and 22 are clogged, a large pressure loss does not occur in the oil mist separation / collection device. Therefore, a large increase in pressure does not occur inside the engine connected to the gas inflow pipe 14, and problems such as oil leakage from the seal portion do not occur.

The filter member 20 according to the above embodiment will be described below.
An experiment was conducted on changes in pressure loss when the angles of the auxiliary vent holes of the upper filter plate 21 and the lower filter plate 22 were changed. The gas flow is a flow rate of 45 Nl / min, which is the maximum flow rate in an automobile engine (flow rate is 0 gas temperature).
It is a value calculated by standardizing a standard condition of ℃ and 1 atm).
As samples 1 and 2, the angles between both auxiliary vent holes were 90 ° and 180 °, respectively. However, the upper and lower filter plates 21 and 22 are completely clogged. In addition, as Reference Example 3, a filter provided with no filter member was added. The experimental results are shown in Table 1 below.

[0014]

[Table 1]

From the above experimental results, the pressure loss increases as the angle of both auxiliary ventilation holes increases, but even at the maximum angle of 180 °, 158 mmAQ.
The result was practically no problem.

In the above embodiment, the material of the filter member is not limited to metal, but plastic, ceramics or the like can be used. Also, as for the filter plate, a porous plate, a slit plate or the like can be used instead of the perforated plate. Further, in the above embodiment, the shape and the like of the oil mist separating and collecting apparatus can be appropriately changed according to the intended use. Further, although the oil mist separating / collecting device is used for the automobile engine in the above-mentioned embodiment, it may be used for the oil mist separating / collecting of other engines and gas turbines.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing an oil mist separating and collecting apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view schematically showing a filter member of the oil mist separation / collection device.

FIG. 3 is a perspective view schematically showing a gas flow of the filter member.

FIG. 4 is a sectional view schematically showing an oil mist separation / collection device according to a conventional example.

[Explanation of symbols]

10 ... Container, 11 ... Upper part, 11a ... Flange part, 11
b ... upper wall, 11c ... outflow port, 12 ... lower side part, 12a ... flange part, 12b ... bottom wall, 12c ... inflow port, 13 ... outflow pipe, 14 ... inflow pipe, 15 ... partition plate, 16 ... oil discharge Tube, 20 ... Filter member, 21 ... Upper filter plate, 21a
... Micro holes, 21b ... Auxiliary ventilation holes, 22 ... Lower filter plate,
22a ... Minute holes, 22b ... Auxiliary ventilation holes, 23 ... Spacers, 23a ... Large ring portion, 23b ... Small ring portion, 23c
… Supporting part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Serizawa 3600 Amigazu, Komaitoyama, Komaki City, Aichi Tokai Rubber Industry Co., Ltd.

Claims (2)

[Claims] 1. A gas inflow space which is attached to an inner surface of a container having an outer wall provided with a gas inflow port and a gas outflow port, and which has a space in the container, the gas inflow space continuing to the gas inflow port, and the gas outflow continuing to the gas outflow port. In an oil mist separation / collection device provided with a filter member for partitioning into a space, as the filter member, a plurality of filter plates are arranged at predetermined intervals and at least one auxiliary vent hole is provided at a different position of each filter plate. An oil mist separation / collection device characterized by being provided. 2. The oil mist separation / collection device according to claim 1, wherein a partition member is provided between the filter plates to partition the space between the filter plates to increase the distance between the auxiliary vent holes. An oil mist separation / collection device characterized in that