DE202007010776U1 - Oil mist separator for an internal combustion engine - Google Patents

Abstract

Oil Mist Separators for internal combustion engines with a centrifugal separator (1) with a disk separator (2) and a rotor (4) axially surrounding gas guide ring (6), characterized in that the gas guide ring (6) is not formed to rotate relative to the rotor (4).

Description

The The present invention relates to an oil mist separator for internal combustion engines with a Tellerseparator and a surrounding a rotor gas guide ring.

In front especially in automotive engineering, for example in crankshaft housings, it is necessary to use a gaseous medium of solid and / or liquid Impurities, such as lubricating oil to clean. Centrifugal separators or oil mist separators are used for this purpose for internal combustion engines, which include a Tellerseparator.

Such a plate separator is from the DE 103 38 770 B4 known, wherein a plurality of axially arranged plates rotate together and thus pressed due to the resulting centrifugal forces, for example, oil droplets to the outside. There you will encounter a substantially cylindrical gas guide ring, which is part of a basket that surrounds the rotor on the outside, wherein the rotor is formed by the plurality of plates. This basket is rotatably connected to the rotor, so that in particular the cylindrical part of the basket rotates with the plates.

Furthermore, on the EP 1 273 335 B1 such a centrifugal separator with disc separator, wherein the rotor is surrounded by a housing outside only and the rotor rotates relative to the stationary housing, so that radially outwardly carried oil impinges on a housing inner side and runs down.

When disadvantageous in these known Zentrifugalabscheidern has proved that without an additional gas guide the Abscheideleistung is not sufficient and with the rotor co-rotating gas guide a considerable design effort requires.

outgoing from this prior art arises for the present Invention the task of a Ölnebelabscheider for Internal combustion engines with a plate separator of the type mentioned to create a simple structural design with improved Has separation efficiency.

The Solution of the problem is achieved by the invention a gas guide ring which is not co-rotating relative to the rotor is.

at a centrifugal separator or an oil mist separator for internal combustion engines with such a trained Tellerseparator is indeed a the rotor or the more axially superposed plate outside surrounding gas guide ring present, this is not co-rotating formed with the rotor. This means that the rotor is relative turns to the surrounding gas guide ring. The gas guide ring forms an impact / deposition surface and may be substantially cylindrical be educated. In known manner, the rotor or the centrifuge formed by the plates by a lubricating oil flow driven. By the rotating plate stack respectively Rotor receive the mixture of gaseous medium and for example a liquid Verunreingigung a swirl-shaped Movement and especially the impurities such as oil due to the centrifugal force discharged to the outside.

One such a simple structure component such as the gas guide ring, for example made of plastic and / or metal can be produced in a simple manner, a plastic injection-molded part is easier to demold and can, especially as described below, be designed in such a way that fulfills the desired functionalities become. The gas guide ring can be designed to be stationary, For example, in that he with the surrounding housing of the Centrifugal separator is firmly connected or it may also be relative to be designed to be rotatable in this housing, wherein he himself does not rotate with the rotor.

Of the Advantage of the invention is that the oil mist separator for internal combustion engines has a simple structure and by the stationary relative to the rotating rotor gas guide ring z. B. oil better separated from an oil mist becomes. It is understood that any fluid media of any Impurities with a so designed centrifugal separator can be cleaned.

additionally the gas guide ring can be designed to be movable in the axial direction, such a variable in its size gap between the gas guide ring and a part of a basket covering the plates, to build. There is a slight overpressure in the plate separator so the gas guide ring can flow through an outward flowing Gas flow in the axial direction can be easily raised so as to the Gap to enlarge until a pressure equalization is established is. Subsequently, the gas guide ring automatically drops again and the gap size is reduced. For this the gas guide ring can also be acted upon by a spring force.

For shaping of the sliding ring this may be bent at its upper edge, where it rests, for example on the above-described upper part of the basket, L-shaped, so as to deflect the gas flow and to direct. In the same way, this upper edge may also be formed cranked, that is, have two substantially 90 degree deflections. By such gutter-shaped edge in particular leakage of impurities such as lubricating oil is prevented upwards.

to Improvement of the separation efficiency are on the gas guide ring inside Guides or fins formed, preferably thread-like are formed running obliquely downwards. Through this Guide troughs will do this on the gas guide ring due to the centrifugal forces impinging oil, for example, in a crankcase derived obliquely down and can no longer be one Gas flow upwards be dissipated with, so that the oil completely recovered. These chutes or lamellae are either designed as mere elevations or actually shaped like a channel.

In Similarly, a substantially vertically formed Grid or network may be provided, which is the Tellerseparator radially surrounds. Such a network or grid, for example, in one piece with the upper part of a rotating basket, so that it also rotates. In principle, this network can But not synonymous with rotating trained and / or it is not further surrounding the Tellerseparator gas guide ring, except the Grid itself, more available.

By this additional grid or the grid wall be in the housing between the housing inner wall of the centrifugal separator and the plate separator two separate Spaces formed. For one, this is between the Tellerseparator or the plates and the grid wall a first space in the substantially the gas is discharged, practically not through the openings the grid wall emerges outwards. On the other hand, between the grid wall and the surrounding Zentrifugalabscheidergehäuse formed a second space in which, for example, the oil is dissipated. By separating these spaces is achieved in the second, outer space practically no more gas flow is present, so that through the openings of the Grid wall or the lattice passed through oil practically can tidy downwards turbulence free.

to further reduction of a gas flow in the second outer Space can be between a housing wall of the centrifugal separator and a basket having a substantially vertical orientation Grid wall formed an additional labyrinth seal which is the passage of a gas stream substantially inhibits, making this second, outer space turbulence-free is held.

alternative to the grid can on an outside the Tellerseparator surrounding basket also substantially vertically oriented Slats should be provided, which are similar to fan blades the swirl and the velocity of the gas flow and thus the centrifugal force for example, increase the oil droplets. Thus, the slats act like a fan.

Preferably these slats are slightly skewed in the axial direction. This means that upwards the lamellae move radially slightly are inclined inside, thus a smaller distance from the axis of rotation have as in a lower portion of the Tellerseparators.

It is understood that these slats, for example, metal and / or Plastic can be made and preferably exchangeable are formed to replace damaged lamellae. For example several slats could be clipped on each end be to a simple construction of the centrifugal separator too receive.

Also here can be an additional surrounding the Tellerseparator outer Gas guide provided or omitted. Likewise the slats are also fixed relative to the rotating Tellerseperator be arranged or co-rotating with this.

After all It is proposed that a substantially vertically aligned Part of the basket surrounding the Tellerseparator lamellar in shape slanted blinds is formed. Also such an arrangement the fins accelerate the gas flow in addition, so that Here, too, the separation efficiency is improved.

Preferably the slats are both downwards and downwards arranged obliquely inclined outside, thus the To direct gas flow in a desired direction and the For example, to further improve oil separation.

Also for this embodiment, an additional on the outside the Tellerseparator and the slanted Lamella surrounding gas guide be provided, but this is unnecessary. Likewise, the slanted Slats also spatially fixed, relative to the rotating Tellerseparator, be arranged or rotating with this.

in the Below are embodiments of the invention Centrifugal separator with a plate separator based on drawings explained. Showing:

1 a centrifugal separator with a gas guide ring,

2 a centrifugal separator with a grid,

3 a centrifugal separator with vertically standing slats,

4 a centrifugal separator with oblique lamellas, and

5 a gas guide ring.

In the 1 to 4 is in each case a centrifugal separator 1 or an oil mist separator for internal combustion engines with a rotating Tellerseparator 2 shown, with several plates 3 a rotor 4 form, which is set in a conventional manner by a lubricant in rotation. The plate separator 2 is here in a housing 5 of the centrifugal separator 1 arranged.

In 1 has the centrifugal separator 1 via an additional gas guide ring 6 the gas guide ring 6 is designed such that it does not interfere with the rotor 4 or the plates 3 rotates. He can either be arranged spatially fixed and, for example, with the housing 5 be firmly connected, or he can be independent of the rotor 4 around the axis of rotation of the plate separator 2 rotate. In addition, the gas guide ring 6 as indicated by the double arrow, movable in the axial direction, so as to form a gap between an upper edge 7 of the gas guide ring 6 and a basket 8th to change. Dominates inside the Tellerseparators 2 a slight overpressure so can the gas guide ring 6 slightly raised by the overpressure, leaving the gap between the edge 7 and the basket 8th increases until a pressure equalization is obtained. Preferably, this is the gas guide ring 6 also acted upon by a spring force. It can be this edge 7 either bent or cranked in an L-shape so as to form a groove, so that the escape of, for example, lubricating oil at this edge 7 is effectively prevented. By relative to the Tellerseparator 2 fixed surface of the gas guide ring 6 becomes the separation efficiency of the centrifugal separator 1 improved. In addition, on the inner surface of the gas guide ring 6 also preferably helically downwardly extending fins or discharge channels 16 be provided for discharging a fluid medium, as in 5 shown.

In 2 that is the plate separator 2 surrounding basket 8th formed such that a substantially vertically oriented part of this basket 8th as a grid 9 , Grid wall or network structure is formed, this area either with the Tellerseparator 2 rotates with or can be designed to be fixed relative to this. Likewise, an additionally arranged outside gas guide ring 6 be provided. Through the grid 9 becomes a first room 10 and a second room 11 educated. In the first room 10 In essence, the gas is discharged through an opening at the top 12 , The further removal of the gas takes place in a conventional manner. Since the gas is almost completely in the first room 10 can be dissipated in the second room 11 For example, lubricating oil can be dissipated much better, because in this second room 11 virtually no gas flow prevails, which could swirl among other oil droplets. Thus, the oil can be discharged in a likewise known manner downwards and recycled.

Furthermore, between the basket 8th and the housing 5 a labyrinth seal 15 formed, which is only hinted here, to an influx of gas, for example, in the second room 11 as far as possible to prevent. Through the labyrinth seal 15 the gas flow is quasi inhibited.

In a further embodiment, the in 3 is shown, is the substantially vertically oriented part of the basket 8th in the form of slats extending substantially in the axial direction 13 formed, for example, made of plastic and / or metal and are preferably releasably fastened to damaged lamellae 13 to be able to exchange. As indicated by the two arrows, the slats 13 tilted slightly upward or tilted upward to act in the manner of a fan, so that the swirl and the velocity of a gas flow is increased, to increase the centrifugal force, which acts on entrained impurities. Thus, the separation efficiency of the centrifugal separator 1 significantly improved. Again, the vertical slats 13 either spatially fixed or with the Tellerseparator 2 be formed co-rotating and it may optionally be another outer gas guide 6 be provided.

Finally, in 4 a fourth embodiment shown, wherein the substantially vertically aligned part of the basket 8th by inclined slats 14 is formed, for example, made of metal and / or plastic and preferably detachable. These oblique lamellas 14 are inclined to the outside and run obliquely downwards in the manner of a tilted window blind, thus also the separation efficiency of the centrifugal separator 1 to improve. Again, a gas flow through an opening 12 dissipated upwards away, leaving outside the oblique slats 14 practically no vortexing gas flow is available. Again, the crooked slats 14 with the plate separator 2 be co-rotating or relative to this fixed and it may be another surrounding the plate separator gas guide 6 be provided.

1

centrifugal

2

Tellerseperator

3

Plate

4

rotor

5

casing

6

gas guiding

7

upper edge

8th

basket

9

grid

10

first room

11

second room

12

opening

13

vertical lamella

14

Leaning lamella

15

labyrinth seal

16

discharge duct

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10338770 B4 [0003]
• - EP 1273335 B1 [0004]

Claims (10)

Oil mist separator for internal combustion engines with a centrifugal separator ( 1 ) with a plate separator ( 2 ) and a rotor ( 4 ) axially surrounding gas guide ring ( 6 ), characterized in that the gas guide ring ( 6 ) relative to the rotor ( 4 ) is not designed to rotate. Centrifugal separator ( 1 ) according to claim 1, characterized in that the gas guide ring ( 6 ) is movable in the axial direction, in particular it is acted upon by a spring force. Centrifugal separator ( 1 ) according to claim 1 or 2, characterized in that an upper edge ( 7 ) of the gas guide ring ( 6 ) Is L-shaped or cranked. Centrifugal separator ( 1 ) according to one of claims 1 to 3, characterized in that the gas guide ring ( 6 ) inside drainage channels ( 16 ) are formed, in particular thread-like. Centrifugal separator ( 1 ) according to one of claims 1 to 4, characterized in that a rotor ( 4 ) surrounding grid ( 9 ), which is a first room ( 10 ) and a second room ( 11 ). Centrifugal separator ( 1 ) according to claim 5, characterized in that a labyrinth seal ( 15 ) between the housing ( 5 ) and the basket ( 8th ) is provided. Centrifugal separator ( 1 ) according to one of claims 1 to 4, characterized in that on a basket ( 8th ) substantially in the axial direction extending slats ( 13 ) are provided. Centrifugal separator ( 1 ) according to claim 7, characterized in that the lamellae ( 13 ) are arranged slightly inclined inwards towards the top. Centrifugal separator ( 1 ) according to one of claims 1 to 4, characterized in that the basket ( 8th ) obliquely downwardly oriented lamellae ( 14 ) are provided. Centrifugal separator ( 1 ) according to claim 9, characterized in that the lamellae ( 13 ) are inclined inclined outwards.