DE2061597A1 - Device for defoaming lubricants, preferably oil - Google Patents

Description

Daimler-Benz Aktiengesellschaft Daim 8907/4

Stuttgart-Untertürkheim December 8, 1970

Device for defoaming
Lubricants, preferably oil

The invention relates to a device for defoaming the like

Lubricants, preferably oil, in particular for supplying hydraulic valve compensation elements in internal combustion engines, to their lubrication or supply points the oil from an oil pan through a feed pump via a Oil channel is promoted.

The purpose of the invention is to provide foam-free oil in an oil defoaming device for special lubrication and supply points, as in special cases of installation an oil supply with completely foam-free oil must be guaranteed, since the 01, especially in engines with can easily be foamed at high speeds.

Even if an oil pump sucks in air-free, i.e. if its suction pipe is below the oil level, this can also be the case with engines at high speeds oil can be heavily foamed. Because of the rapid circulation of the oil, air is released from the environment carried away and then passed with the 01 to the lubrication or supply point.

Hydraulic valve lash adjustment elements must be supplied with air-free oil to prevent rattling of the elements, in particular when starting to avoid. For this case a defoaming device was developed by the airless oil. separated from aerated oil.

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At the same time this device can be used for the oil supply can be used by hydraulic chain tensioners, as these are also supplied with air-free oil, especially when starting up to avoid rattling.

This object is achieved in an inventive way by that in a housing a vertically extending channel to the 01 connected, opening into a line leading to the oil pan central tube is arranged, in which there is a throttle point is located, in front of the - seen in the direction of flow holes are arranged in the opposite to the central tube open into larger housing space, from which the cleaned 01 through an opening at the bottom to the valve lash adjustment elements is discharged, while oil, which may still be permeated with air, is passed through a top on the housing space Mounted opening can flow into the line leading to the oil pan.

In such a device, a partition, which is mounted just below the holes, in the housing can be an upper one Separate the ventilation room from a lower storage room, the are connected to each other only by an annular gap remaining between the partition and the housing wall. This partition can expediently be supported on a fine-meshed sieve jacket that surrounds the central tube and serves as a filter, which comprises the mouth of the opening provided below, preferably in the bottom of the housing, through which the cleaned Oil flows to the hydraulic elements. Furthermore, the opening at the top can consist of a gap, between the central tube and the wall of the opening made in the ceiling of the housing and pierced by the central tube remains and the opening in one of an annular chamber cylinder Enclosed space leads into which also open recesses connected to the core of the central tube.

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Furthermore, it can be advantageous to have the central tube penetrating the entire housing on the one hand with a head and on the other hand, to be provided with a thread with which it is screwed into the housing base up to the oil channel is, while the at least on one side provided with a flattened head with a connection for the Oil pan leading line provided with a sealing ring chamber cylinder presses against the ceiling of the housing, whereby the gap is also sealed.

Further details of the invention emerge from the following description, in which a shown in the drawing Embodiment is explained in more detail. f

The drawing shows a defoamer according to the invention in a vertical section.

A housing 2 is firmly seated on a housing base 1 and is tightly connected to it. In the housing base there is an oil channel 3 * which can be connected to a line coming from the main oil channel. Furthermore, the housing bottom is provided with a bore k which is in communication with the interior of the housing 2 via an opening 5 and to which, on the other hand, a line can be connected which leads to the hydraulic elements to be supplied with purified oil;

ten leads. '

A central tube 7, provided with a thread 6 and penetrating the entire housing, is screwed into the housing base 1 to such an extent that that it penetrates to the oil channel 3 and its core 8 with the oil channel 3 is a otherwise sealed connection Has.

On the other side, the central tube ends with a head 9 which is provided with a flat on at least one side is to be able to screw the central tube with its thread 6 into the housing base.

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Between the head 9 of the central tube 7 and the ceiling 11 of the Housing 2, an annular chamber cylinder 12 is used, which of your head 9 of the tightened central tube 7 sealingly against the Ceiling 11 of the housing 2 is pressed. To the sealing of the Ringkanmierzylinders 12 between the head 9 of the central tube 7 and the ceiling 11 of the housing 2, there are 12 sealing washers on both sides of the annular chamber cylinder 13 inserted. The lower of the sealing washers I3 must but be so large that there is a gap between the central tube 7 on the one hand and the annular chamber cylinder 12 and the ceiling 11 on the other hand remaining opening 14 leaves free, which the space inside the annular chamber cylinder 12 with the larger housing space l6 of the housing connects. The space 15 in the annular chamber cylinder 12 also has a connection to a line 17 »which is connected to the oil pan. Furthermore, the room has Via recesses 18 connection to the core 8 of the central tube 7

The core 8 of the central tube has in the lower part of the larger housing space l6, which is from the lower storage space 19 by a Partition wall 21 is separated, a throttle point 22. Below the throttle point 22, 7 holes 23 are made in the central tube, which connect the core 8 of the central tube with the larger housing space l6.

The partition wall 21, which is only so large that it leaves an annular gap 24 between its periphery and the housing 2, is based with its lower conical surface 25 on a the fine-meshed sieve casing 28 surrounding the central tube 7, which also forms the mouth of the placed in the bottom 1 of the housing 2 opening 5 includes. The partition wall 21 and thus the screen jacket 28 are pressed by a spring 26 downwards, so that the screen jacket both on the housing base and on the Partition wall fits tightly.

To operate the device according to the invention for defoaming From 01, after the engine has been started up, this also becomes the usual way of those arranged above the cylinders Camshafts conveyed through a main oil duct. Of this

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In the main oil channel, a line is branched off, which is connected to the oil channel 3 of the defoamer. The oil penetrating here, which can still be mixed with air, penetrates into the core 8 of the central tube after flowing through the oil duct 3. The oil flow is divided by the throttle point 22. One part flows through this throttle point 22 into the upper part of the core 8 of the central tube 7 and from there through the recesses 18 into the space 15 enclosed by the annular chamber cylinder 12.The other part of the oil flow penetrates the holes 23 and reaches the larger housing space l6, which is used to vent the same due to the now reduced flow rate of the oil. With air throughput A oil added, the more easily than non-aerated oil slowly flows upward comes to the ball to tapered surface 27 of the cover 11 and thence attached to the top of the housing chamber opening 14, the walls of which also can be designed to be tapered from bottom to top to the center. The oil permeated with air now also penetrates into the space 15 through the opening 14. From there, the oil in this space is fed back via line 17 to the oil pan.

The heavier part of the oil, which is not or only slightly permeated with oil, penetrates through the ring gap 2k into the lower storage space 19. Optionally, like beer air still present is now retained by the basket 28 and has to flow back through the outwardly inclined surface 25 in particular, with the engine stopped opportunity in the housing space sixteenth From the inner storage space 29 enclosed by the sieve casing 28, the cleaned oil can now be conveyed through the opening 5 made in the bottom of the housing 1 via the bore 4 to the hydraulic valve lash adjustment elements.

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The screen jacket expediently has a mesh size from 10 to 20 / u.

The described defoaming device ensures that the hydraulic elements are immediately supplied with air-free oil when starting up. This creates a start-up rattle avoided. Since only leakage losses in the hydraulic valve lash adjustment elements are refilled must, so the defoamer has only a small flow during operation, is also during engine operation a practically air-free oil is pumped to the hydraulic valve lash adjustment elements.

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Claims (1)

- 7 - Daim 8907/4 Expectations Device for defoaming lubricants, preferably oil, in particular for supplying hydraulic valve lash adjustment elements in internal combustion engines, to the lubrication or supply points of which the oil is conveyed from an oil pan by a feed pump via a channel, characterized in that a housing (2) has a vertically extending central tube (7) connected to the oil duct (3) and opening into a line (17) leading to the oil pan, in which there is a throttle point (22), in front of which - seen in the direction of flow - holes _Λ (23) are attached, which are in the opposite of the central tube ™ (7) open into larger housing space (16), from which the cleaned oil is fed through an opening (5) at the bottom the valve lash adjustment elements is derived, while with air possibly still permeated oil through a The opening (l4) at the top of the housing space can flow into the line (17) leading to the oil pan 2. Apparatus according to claim 1, characterized in that a partition (21) which is mounted just below the holes (23) in the housing (2) an upper ventilation space (l6) from a lower storage space (I9) separates which with each other connected only by 'an annular gap (24) remaining between the partition (21) λ and the housing wall (.2). 3. Device according to claim 1 or 2, characterized in that that the partition (21) is supported on a fine-mesh screen jacket (28) surrounding the central tube (7), which also includes the mouth of the bottom, preferably in the bottom (l) of the housing (2) mounted opening (5) through which the purified oil flows to the hydraulic elements -8th- 209827/0215 ORIGINAL - 8 - Daim 8907A h . Device according to claims 1-3, characterized in that the opening (lh) attached at the top consists of a gap between the central tube (7) and the wall of the central tube made in the ceiling (ll) of the housing (2) (7) remains and the opening (lh) leads into a barely enclosed by an annular chamber cylinder (12) into which recesses (l8) connected to the core (8) of the central tube (7) open. 5. Device according to claims 1-4, characterized in that the entire housing (2) penetrating central tube (7) is provided on the one hand with a head (9) and on the other hand with a thread (6) with which it is in the housing base (l) is screwed in as far as the oil channel (3), while the head, which is provided with a flattening on at least one side, seals the annular chamber cylinder (12), which is provided with a connection for the line leading to the oil pan, against the cover (ll) of the housing (2) ) presses, whereby the opening (lh) is also sealed. 209827/0215 BATH ORIGINAL