DE102007058744A1 - Plain bearing shell for use as main bearing shell in crankshaft bearing, has two partial surfaces and two side surfaces, where bearing coating is made of bearing coating material - Google Patents

Abstract

A sliding bearing shell (1) with two partial surfaces (2a, b) and with two lateral surfaces (3a, b) is described. The sliding bearing shell has at least one sliding layer of a sliding layer material and has at least one lubricant barrier (20) arranged on the inner circumference, which consists of a material charge, in particular of a melt charge. A bearing arrangement and a method for producing plain bearing shells are also described.

Description

The The invention relates to a sliding bearing shell with two partial surfaces and with two side surfaces, with at least one sliding layer made of a sliding layer material and with at least one on the inner circumference arranged lubricant barrier.

The The invention also relates to a particular use of a such plain bearing shell and to a method for producing Such plain bearing shells and on a bearing assembly.

The Plain bearing shells have a sliding surface on the inside, which is formed by a sliding layer material. The plain bearing shells may consist of a monometal, but is preferred a layered composite material. In general, the plain bearing shells a carrier material, in particular a steel backing, on which a sliding layer material or a layer system with a sliding layer material is applied as an upper layer. One typical layer construction sees a bearing metal on the steel back is applied, and a deposited on the bearing metal sliding layer before, between the bearing metal and the sliding layer, if necessary, a or a plurality of diffusion barrier layers may be arranged.

such Plain bearing shells are well known and are mainly used in Internal combustion engines used to support the crankshaft. The Main crankshaft bearings are lubricated via channels, lubricating oil supplied, the oil over an oil groove in the plain bearing shell and over the Crankshaft cheek the connecting rod journal and thus fed to the connecting rod becomes. It has been found that only about 25% of the oil on the Arrive rod bearing. This is due to, that the oil losses mainly in the axial direction relative to the main bearing shells, that is vertical To the Nutrichtung, are very large. The oil drain becomes with increasing play between the plain bearing shell and the Opposites, such as waves or cones, favored. To constantly ensure adequate lubrication are correspondingly large oil pumps for promotion a sufficiently large amount of oil required. A shortage and thus a demolition of the oil film in the Connecting rod bearing and the insufficient supply of the connecting rod with oil would cause a quick wear or scuffing the sliding partner and lead to premature failure of the bearing.

To remedy this, be in the DE 10 2004 028 773 64 Lubricant barriers proposed in the form of Dehnlementen, which are arranged either between the bearing housing and the plain bearing shell or between the plain bearing shell and the counter-rotor. It is according to the DE 10 2004 028 773 B4 have been recognized that Spaltentstehungsprozesse can be compensated by expansion elements. In particular, it has been recognized that it is possible to dispense with the use of heavy metals, which have to be optimized particularly costly with regard to their thermal expansion coefficient. There are proposed expansion elements, which are made of lightweight materials, such. As polytetrafluoroethylene compounds, may be made to compensate for expansion processes of the components.

When Elongation is therefore proposed those that have a larger Thermal expansion coefficient, as the materials, from which the bearing element and the shaft to be supported or the plain bearing shell are made.

So far the expansion elements in the sliding surface of the plain bearing shell are arranged, these are on the plain bearing shell edge and thus spaced from the lubricant groove.

There the expansion elements have a high thermal expansion coefficient can, with a small gap between the plain bearing shell and the shaft may be at high temperatures the expansion elements are built up a clamping pressure, which is the rotation the shaft obstructs or the wear of the expansion elements increased, whereby they lose their effect.

One Another disadvantage is that the expansion elements made separately and then in specially prepared Grooves must be used. The production cost is very high.

It is therefore an object of the invention to provide a plain bearing shell, the no or only slight lubricant losses during operation allows, with the lubricant barriers simple and inexpensive to be produced.

These Task is solved with a plain bearing shell, in the the lubricant barrier consists of a material throw.

Material on rolls have the advantage that the lubricant barrier is an integral part the sliding bearing shell is and thus in contrast to separate elements no measures to fix the lubricant barriers required are.

Another advantage is the fact that a Materialaufwurf consists at least of the sliding layer material and thus has the same positive sliding properties, as the rest of the sliding surface. Depending on the type of layer structure of Gleitla gerschale and the height of the lubricant barrier material consists of either exclusively of the sliding layer material or the Aufwurf contains in addition to the material of the overlay still material from the underlying layers, such. As the bearing metal or possibly also from the material of the diffusion barrier layer. There is thus the possibility of deliberately changing the properties of the lubricant barrier by the proportion of materials from the lower layers.

Of the Materialaufwurf preferably consists of a melt charge, by means of treatment of the sliding layer by means of a laser beam can be generated in a simple manner.

When Alternatives to the melt charge can be the material throw from a Embossing, a Rollieraufwurf or a knurled Aufwurf consist. Such complaints are made by mechanical methods produced, where an embossing punch, a roller blade or a knurling tool is used. Training The lubricant barriers occur during the mechanical processes through material displacement.

Preferably The plain bearing shells are used in crankshaft main bearings. It has been shown that when using this plain bearing shells Reduce oil flow in crankshaft main bearings by up to 30% leaves. The advantage of the reduced oil flow allows therefore the use of smaller sized oil pumps, thereby Engines can be operated significantly more economical.

plain bearing shells preferably have a lubricant channel. At least one lubricant barrier is disposed between the bearing shell rim and the lubricant channel.

The The lubricant barrier is preferably marginal or spaced arranged to the edge of the sliding bearing shell. For bearings with lubricant channel the lubricant barriers can be laid as far as they are inside Be sure they are at the edge or adjacent to the edge of the lubricant channel are arranged.

The The lubricant barrier preferably extends at least over a section of the inner circumference. The lubricant barrier can also have interruptions and thus along the circumference comprise several barrier sections. Interruptions of the lubricant barrier have the advantage that targeted small amounts of oil in the axial direction can drain and thereby discharged dirt particles can be.

The The lubricant barrier preferably extends beyond the partial surface a section of the inner circumference. The arrangement of the lubricant barrier in this area is advantageous because it has been found that the biggest oil losses occur there.

This especially applies if the plain bearing shell in this area has an exposure. Exposures extend from one End of the sliding bearing shell to the partial surface and are either in front of a partial surface or in front of both partial surfaces arranged. The lubricant barrier extends at this Embodiment preferably of the partial surface at least beyond the scope of exposure.

A further advantageous embodiment of the plain bearing shell provides that the lubricant barrier over the entire inner circumference the sliding bearing shell extends.

Preferably is at each edge or spaced from each edge at least one Lubricant barrier arranged.

The Sealing can be significantly increased when in axial Direction of the plain bearing shell at least two lubricant barriers are arranged. It becomes a kind of labyrinth seal in this way generated. This arrangement is particularly advantageous if with a significant wear of the lubricant barriers during operation and thus a deterioration of the sealing effect is to be reckoned. A staggered array of lubricant barriers in the axial direction, preferably also with different heights H the lubricant barriers, improves the sealing effect.

lubricant barriers can be executed arbitrarily. Preferred are straight-line lubricant barriers, undulating lubricant barriers and zigzag lubricant barriers, including different versions can be combined.

It has proven to be advantageous when the lubricant barrier in the direction of the partial surface turns outward. If Lubricant barriers are provided on both sides, is characterized the flow cross section of the lubricant in the direction Part surface enlarged. The dynamic pressure can be specifically reduced.

It is also possible, the lubricant barriers in the direction Turn part faces inwards. Accordingly, at an arrangement of two lubricant barriers of the flow cross section accordingly reduced, causing a pressure increase in the range between the lubricant barriers can be achieved.

One Materialaufwurf goes with a material reduction elsewhere associated. In this respect, forms in the production of lubricant barriers next the lubricant barrier a groove-like depression. This groove-like Deepening can be used to advantage when following the inside facing side of the lubricant barrier is arranged and thus overflowed by the lubricant, in particular the lubricating oil becomes. It has been shown that dirt particles in the lubricant collect in this groove-like depression and thus the lubricant can be easily withdrawn.

The groove-like depression can also be on the outward facing Be arranged side of the lubricant barrier.

According to one Another embodiment, the groove-like depression be arranged between two lubricant barriers. Such Arrangement can be generated for example by means of a laser beam be perpendicular to the inner surface of the plain bearing shell is directed so that forms a material Aufwurf on both sides of the laser beam.

The Height H of the lubricant barrier is preferably included 5 to 60 microns and depends essentially on the gap between the sliding bearing shell and the counter rotor. preferred Heights of the lubricant barrier are 10 to 50 μm, 30 to 50 μm and 30 to 40 μm.

The Width B of the lubricant barrier is advantageously included 0.5 to 2 mm, in particular 0.75 to 1.5 mm. Wider lubricant barriers have the advantage that during operation a lesser removal of the lubricant barriers takes place as this is the case with narrower lubricant barriers is.

A Inventive bearing assembly sees two plain bearing shells and a rotating counter-rotor mounted in the plain bearing shells before, where between counter runner and sliding surface the sliding bearing shell a bearing gap S is present, at least a plain bearing shell a lubricant channel and at least one arranged on the inner circumference, the bearing gap S between the plain bearing shell and the countercurrent lubricant barrier having. At least one sliding bearing shell of this bearing arrangement has a lubricant barrier resulting from a material throw consists.

Preferably are at least in the area of the lubricant groove on both sides respectively Lubricant barriers provided in the form of Materialaufwürfen.

• – Bereitstellen einer vorgefertigten Gleitlagerschale, und
• – Ausbilden mindestens einer Schmiermittelbarriere mittels mindestens eines Laserstrahls, der unter einem Winkel α auf die Innenfläche der Gleitlagerschale gelenkt und längs einer vorbestimmten Bahn über die Innenfläche geführt wird, wobei der Winkel α zwischen dem Laserstrahl und der Senkrechten auf der Innenfläche gemessen wird.

The method for producing plain bearing shells is characterized by the following steps:

• - Providing a prefabricated plain bearing shell, and
• - Forming at least one lubricant barrier by means of at least one laser beam which is directed at an angle α on the inner surface of the sliding bearing shell and guided along a predetermined path over the inner surface, wherein the angle α between the laser beam and the perpendicular to the inner surface is measured.

Of the Use of laser beams has the advantage that after deployment the sliding bearing shell without mechanical stress the lubricant barriers can be produced. This means that the plain bearing shell can already be calibrated and only this one mechanically non-incriminating process step must be subjected.

One Another advantage is that the laser beam to any Point of the inner surface of the plain bearing shell to be steered can, so at any point the lubricant barriers can be generated.

about the power of the laser beam on the one hand and the angle α on the other can barrier different properties of the lubricant and the lubricant barrier adjacent groove-like depression be set.

about the power of the laser and thus the energy input through the laser beam can the height of the melt charge to be controlled. It is thus possible to adjust the height the amount of material to be kept constant or the height to vary according to a given pattern.

Along the web makes it possible to both the height of the lubricant barrier as well as their width by changing the performance and possibly also adjust by a change in the angle α. The larger the angle α selected the wider the groove-like depression becomes, from which the material becomes is provided for the material disposal. With vertical Incidence (angle α = 0) is on both sides of the groove-like depression created a Materialaufwurf, so formed a double barrier becomes.

There are essentially two variants of the method possible. The prefabricated sliding bearing shell can already have the sliding layer according to a first embodiment. Subsequently, the formation of the lubricant barriers is performed. This method is suitable for plain bearing shells whose sliding layer has a corresponding thickness. This is the case, for example, with plain bearing shells, which on the steel back a meh wear 100 μm thick overlay.

According to one Another embodiment may also be thinner Sliding layers already be applied to the plain bearing shell. Such overlays can be plated or else be applied galvanically. These applied to a bearing metal Sliding layers are usually in the range of a few 10 microns. In this embodiment form, it is advantageous, the angle α as possible big to choose, so the underlying layer is not is affected by the laser beam and thus also no material of this underlying layer is removed. If necessary, this material should also be required remove and bring in the melt charge to the properties Adjust the lubricant barrier accordingly, can also correspondingly smaller angle α can be selected.

According to one second embodiment comprises the prefabricated plain bearing shell still no overlay, so the melt charge from the material the underlying layer, for example Bearing metal layer, is formed. The sliding layer is at this Embodiment of the method after forming the lubricant barrier applied. The sliding layer thus also covers the Grease barrier. Preferably, the sliding layer in this Embodiment galvanically applied.

Preferably becomes a pulsed laser, in particular a pulsed solid-state laser used. By means of a pulsed laser is briefly a high Performance introduced, the desired material Aufwurf generated. Preferably, the laser is at a frequency of 50 to 100 hertz, in particular pulsed from 60 to 80 hertz. this leads to in the area of the groove-like depression to a scale-like formation, which is related to the fact that the pulsed laser beam continuously over the inner surface of the plain bearing shell is moved.

Of the Laser beam is preferably at an angle α between 0 ° and 50 ° steered to the inner surface. Preferred angles lying at 25 ° to 35 °.

exemplary Embodiments of the invention are described below explained in more detail in the drawings.

It demonstrate:

1 a perspective view of a plain bearing shell according to a first embodiment, cut open in the middle and opened,

2 3 a perspective view of an end section of a sliding bearing shell according to a further embodiment, enlarged,

3 a perspective view of an end portion of a sliding bearing shell according to another embodiment, enlarged,

4 a perspective view of a sliding bearing shell according to another embodiment, cut open in the middle and opened,

5a - 5f various embodiments of lubricant barriers based on halved bearings in perspective views,

6 - 14 various cross-sectional shapes and arrangements of lubricant barriers,

15 the partial plan view of a lubricant barrier with adjacent groove-like recess with scaly surface in an enlarged view,

16 the side view of a sliding bearing shell with a lubricant barrier according to another embodiment,

17 - 18 schematic representations of various mechanical production processes in section,

19 a bearing arrangement in side view,

20 a bearing arrangement in longitudinal section in the plane XX-XX of 19 , and

21 a diagram showing the oil flow as a function of the speed of rotation of the counter-rotor and the oil pressure.

In the 1 is a plain bearing shell 1 shown in perspective, the two ends at its two ends 2a , b and at the front sides two side surfaces 3a , b. The inner surface of the plain bearing shell 1 is with 5 while the rear outer surface is the reference numeral 4 wearing. Along the inner circumference is a lubricant channel 15 arranged, over an oil well 17 in the area of the vertex 7 the plain bearing shell with lubricant, especially lubricating oil, is supplied.

In the in the 1 shown embodiment are in the end regions of the plain bearing shell 1 spaced to the edge 8th two lubrication barriers each 20 presented in the form of Materialaufwürfen. The lubricant barriers 20 extend from the faces 2a , b as straightforward barriers in Direction crest 7 and terminate at a distance from the vertex 7 , Immediately adjacent to the lubricant barriers 20 are groove-like depressions 25 provided in connection with the 6 to 18 be described in more detail. By means of these lubricant barriers 20 becomes the uncontrolled oil drain in the direction of the axis 6 the plain bearing shell effectively prevented.

In the 2 is an enlarged view of another embodiment of the sliding liner 1 shown in the end below the subarea 2a an exposure 16 having. This exposure is continuous in the inner surface 5 over and ends in front of the lubricant channel 15 whose groove depth is continuously in the direction of the partial surface 2a reduced. The lubricant barrier 20 extends from the subarea 2a through the exposure area into the inner surface 5 and ends below the exposure area 16 ,

The plain bearing shell of 3 differs from the embodiment according to the 2 only in that the lubricant channel 15 down to the partial area 2a extends.

In the 4 an embodiment is shown in which the lubricant barriers 20 over the entire inner circumference of a partial surface 2a to the other part surface 2 B extend. The lubricant barriers are designed as straight-line barriers. A lubricant channel 15 is in this plain bearing shell 1 not provided. All embodiments of lubricant barriers 20 can on plain bearing shells 1 with and without lubricant channel 15 will be realized.

In the 5a to 5f Different versions are shown schematically. In the 5a are on both sides of the lubricant channel 15 two lubricant barriers each 20 intended. These may have an equal or different height H.

In the 5b to 5f are the depressions 25 have been omitted for clarity.

In the 5b are lubricant barriers 20 shown having breaks. This embodiment has the advantage that a targeted oil drain is permitted over the length of the individual lubricant barrier sections and the corresponding interruptions in order, for example, to discharge dirt particles.

In the 5c are lubricant barriers 20 shown, the end sections 21 have, which are arranged inclined outwardly, so that the cross section between the lubricant barrier 20 in the direction of the partial area 2a is enlarged. In the 5d is a wave-shaped embodiment of the lubricant barriers 20 shown. In the 5e are the end sections 22 the lubricant barriers 20 inclined inwards, so that a cross-sectional reduction is achieved.

In the 5f are zigzag lubricant barriers 20 shown.

In the 6 is shown schematically as by means of a laser beam 30 , which is perpendicular to the inner surface 5 directed material spills to form lubricant barriers 20 can be generated. By the vertical impact of the laser beam 30 becomes a groove-like depression 25 generated, which has on both sides of this recess material Aufwürfe. Since the material from the groove-like depression 25 on two lubricant barriers 20 These are lower than if they were the same material for a single lubricant barrier 20 is used, as in the 7 is shown. There, the laser beam at the angle α of about 30 ° relative to the vertical 32 on the inner surface 5 directed. As a result, the molten material is only on one side of the groove-like depression 25 piled up.

In the 7 are heights and widths of the lubricant barrier 20 located. Typical values for height H are 5-60 μm, with values between 35 and 45 μm being preferred. The width B of the lubricant barrier is between 0.5 and 2 mm.

When the angle α is made larger, the groove-like depression becomes shallower and wider as shown in FIG 8th is shown.

When the laser beam 30 in contrast to the embodiment of 7 and 8th from the right side to the surface 5 is directed, arises on the left side of the groove-like depression 25 the lubricant barrier 20 (please refer 9 ).

In the 10 is the embodiment of 9 shown again, wherein the groove-like depression 25 with dirt particles 26 is filled up. This embodiment provides that the lubricant barrier 20 adjacent to the edge 8th is arranged and the groove-like depression 25 insofar provided inside, so that the groove-like depression 25 is overflowed by the lubricant. The groove-like depression 25 serves as a reservoir for dirt particles of the lubricant.

In the 11 is shown a further embodiment in which the groove-shaped recess 25 is arranged outside lying. The groove-like depression 25 is located between the edge 8th the sliding bearing shell 1 and the lubricant barrier 20 , Ge according to 11 exists the plain bearing shell 1 from a steel back 10 and a sliding layer 12 , z. B. from AlSn20 shown. The sliding layer 12 has a thickness of about 250 microns to 400 microns, so that the groove-like depression 25 exclusively in the overlay 12 located. Accordingly, the lubricant barrier becomes 20 exclusively of the material of the sliding layer 12 educated.

In the 12 a further embodiment is shown, which is a plain bearing shell 1 with a composite material consisting of three layers. On the steel back 10 is a bearing metal 11 applied to the example by electroplating a sliding layer 12 is applied. The bearing metal can for example consist of CuNi2Si, on which a sliding layer 12 made of the material SnCu6. The sliding layer 12 has a thickness of 15 microns to 20 microns.

To a lubricant barrier 20 With a height in the range to produce up to 60 microns, it is necessary that a corresponding amount of material is melted. The thickness of the sliding layer 12 is not enough, so that also material of the bearing metal 11 participates in the melting process. This causes the lubricant barrier 20 both material of the sliding layer 12 as well as material of the bearing metal 11 having. This is in the 12 only shown schematically.

In the 13 a further embodiment can be seen, according to which the sliding layer 12 only after the formation of the lubricant barrier 20 and thus the groove-like depression 25 is applied, preferably galvanized. This method has the advantage that the sliding layer 12 largely uniform all areas including the groove-like depression 25 and the lubricant barrier 20 covered. The thickness of the sliding layer 12 is therefore almost the same size at all points.

In the 14 is another embodiment of a three-layer bearing shell 1 shown. In this embodiment, the laser beam becomes 30 at a large angle α to the surface 5 directed so that only the material of the sliding layer 12 used up and used for the formation of the Schmelzaufwurfs.

In the 15 is the top view of a lubricant barrier 20 with juxtaposed groove-like depression 25 shown. It can be seen that the groove-like depression 25 a structure with scales 27 having. Preferably, a pulsed laser is used, the laser beam continuously over the surface of the plain bearing shell 1 to be led. The scale structure is created by the laser pulses.

In the 16 another embodiment is shown in which the lubricant barrier 20 has a wavy contour. The height H of the lubricant barrier 20 varies along the circumference, which can be achieved by a corresponding control of the laser with respect to its performance. This embodiment has the advantage that over the troughs of the lubricant barrier 20 can selectively drain a defined amount of oil and thus also dirt particles.

In the 17 and 18 mechanical production processes are shown. In the 17 becomes a stamp 40 with a lead 42 and a depression 44 on the surface of the sliding layer 12 pressed. When the stamp is pressed on a material displacement takes place, so that a lubricant barrier 20 with adjoining groove-like depression 25 is produced.

In the 18 becomes a roller blade 50 used at the angle α in the surface of the layer 12 is pressed in order to produce in this way a material Aufwurf.

In the 19 is a bearing arrangement with upper shell 1' and lower shell 1 and shown with a counter-runner in side view.

In the 20 is the bearing assembly along the section line in 19 with two of the plain bearing shells 1 . 1' and the counter-runner 8th represented in the form of a rotating shaft. Between the inner surface 5 the sliding bearing shells 1 . 1' and the shaft passes a gap S, which is the barrier of the lubricant 20 side of the plain bearing shells 1 . 1' closed, leaving the lubricant 9 can not drain away laterally. In this arrangement has only the upper shell 1' a lubricant channel 15 ,

In the 21 is a diagram of the oil loss at the main bearing shell as a function of the speed and the oil pressure shown. It can be seen that the oil loss in a plain bearing shell without lubricant barriers is significantly higher than in a plain bearing shell with lubricant barriers. The oil savings are approximately 15% to 30% over the entire speed range. Here, a plain bearing shell with lubricant barriers according to the 3 used.

1, 1'

plain bearing shell

2a, b

subarea

3a, b

side surface

4

outer surface

5

palm

6

axis the sliding bearing shell

7

vertex the sliding bearing shell

8th

expeller

9

lubricant

10

support material

11

bearing metal

12

Overlay

15

lubricant channel

16

exposure

17

oil well

20

lubricant barrier

21

section the lubricant barrier

22

section the lubricant barrier

25

groove-like deepening

26

dirt

27

shed

30

laser beam

32

vertical

40

stamp

42

head Start

44

deepening

50

rolling knife

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 10200402877364 [0005]
• DE 102004028773 B4 [0005]

Claims (38)

Plain bearing shell ( 1 ) with two partial surfaces ( 2a , b) and with two side surfaces ( 3a , b), with at least one sliding layer ( 12 ) of a sliding layer material and with at least one lubricant barrier arranged on the inner circumference ( 20 ), characterized in that the lubricant barrier ( 20 ) consists of a Materialaufwurf. Slide bearing shell according to claim 1, characterized that the material throw consists of a melt charge. Slide bearing shell according to claim 1, characterized that the Materialaufwurf from a mint or a Rollieraufwurf exists. Slide bearing shell according to one of claims 1 to 3, characterized in that the lubricant barrier at the edge ( 8th ) or spaced from the edge ( 8th ) of the sliding bearing shell ( 1 ) is arranged. Slide bearing shell according to claim 4, characterized in that the sliding bearing shell a lubricant channel ( 15 ) and that at least one lubricant barrier ( 20 ) between the edge 8th and the lubricant channel 15 is arranged. Slide bearing shell according to one of claims 1 to 5, characterized in that the lubricant barrier ( 20 ) extends over at least a portion of the inner circumference. Slide bearing shell according to one of claims 1 to 6, characterized in that the lubricant barrier ( 20 ) of the partial surface ( 2a , b) extends over a portion of the inner circumference. Slide bearing shell according to one of claims 1 to 7, characterized in that the plain bearing shell ( 1 ) on the inner circumference at least one up to a partial area ( 2a , b) extending exposure ( 16 ) and that the lubricant barrier ( 20 ) of the partial surface ( 2a , b) at least on the exposure ( 16 ). Slide bearing shell according to one of claims 1 to 8, characterized in that the lubricant barrier ( 20 ) over the entire inner circumference of the plain bearing shell ( 1 ). Slide bearing shell according to one of claims 1 to 9, characterized in that at each edge ( 8th ) or spaced at each edge ( 8th ) at least one lubricant barrier ( 20 ) is arranged. Slide bearing shell according to one of claims 1 to 10, characterized in that in the axial direction of the plain bearing shell ( 1 ) at least two lubricant barriers ( 20 ) are arranged. Slide bearing shell according to claim 11, characterized in that in the axial direction juxtaposed lubricant barriers ( 20 ) have different heights H. Slide bearing shell according to one of claims 1 to 12, characterized in that the lubricant barrier ( 20 ) is executed in a straight line. Slide bearing shell according to one of claims 1 to 12, characterized in that the lubricant barrier ( 20 ) is wavy. Slide bearing shell according to one of claims 1 to 12, characterized in that the lubricant barrier ( 10 ) is zigzag-shaped. Slide bearing shell according to one of claims 1 to 15, characterized in that the lubricant barrier ( 20 ) in the direction of the partial area ( 2a , b) turns outward. Slide bearing shell according to one of claims 1 to 16, characterized in that the lubricant barrier ( 20 ) in the direction of the partial area ( 2a , b) turns inwards. Slide bearing shell according to one of claims 1 to 17, characterized in that in addition to the lubricant barrier ( 20 ) a groove-like depression ( 25 ) is provided. Slide bearing shell according to claim 18, characterized in that the groove-like depression ( 25 ) on the inwardly facing side of the lubricant barrier ( 20 ) is arranged. Sliding tray according to claim 18, characterized in that the groove-like depression ( 25 ) on the outwardly facing side of the lubricant barrier ( 20 ) is arranged. Slide bearing shell according to one of claims 1 to 20, characterized in that the groove-like depression ( 25 ) between two lubricant barriers ( 20 ) is arranged. Slide bearing shell according to one of the claims 1 to 21, characterized in that the height H of the lubricant barrier 5 to 60 microns. Slide bearing shell according to one of claims 1 to 22, characterized in that the width B of the lubricant barrier ( 20 ) Is 0.5-2 mm. Slide bearing shell according to one of claims 1 to 23, characterized in that the plain bearings Bowl ( 1 ) of a carrier material ( 10 ) and a sliding layer ( 12 ) and that the lubricant barrier ( 20 ) consists of sliding layer material. Slide bearing shell according to one of claims 1 to 23, characterized in that the sliding bearing shell, a carrier material, a bearing metal ( 11 ) and a slip layer ( 12 ) and that the lubricant barrier ( 20 ) of sliding layer material or of sliding layer material and bearing metal ( 11 ) consists. Use of the sliding bearing shell according to one of the claims 1 to 25 as the main bearing shell in crankshaft bearings. Bearing arrangement with two plain bearing shells ( 1 . 1' ) and one in the sliding liners ( 1 . 1' ) mounted rotating counter-runners ( 8th ), whereby between counterparts ( 8th ) and sliding surface of the sliding bearing shell ( 1 . 1' ) a bearing gap S is present, wherein at least one sliding bearing shell ( 1 . 1' ) a lubricant channel ( 15 ) and at least one arranged on the inner circumference, the bearing gap S between the sliding bearing shell and the counter-rotor closing lubricant barrier ( 20 ), characterized in that the lubricant barrier ( 20 ) consists of a material throw-up and that during operation the lubricant barrier ( 20 ) the counter-runner ( 8th ) touched. Bearing arrangement according to claim 27, characterized in that the plain bearing shell ( 1 . 1' ) at least in the region on both sides of the lubricant channel ( 15 ) at least one lubricant barrier ( 20 ) having. Method for producing plain bearing shells, characterized by the following steps: - Provide a prefabricated plain bearing shell, - Training at least one lubricant barrier by means of at least one Laser beam, which at an angle α on the inner surface the slide bearing shell steered and along a predetermined Web is guided over the inner surface, where the angle α between the laser beam and the vertical is measured on the inner surface. Method according to claim 29, characterized the prefabricated sliding bearing shell has a sliding layer. Method according to claim 29, characterized that the prefabricated plain bearing shell still no sliding layer and that the sliding layer after forming the lubricant barrier is applied. Method according to claim 31, characterized in that that the sliding layer is applied galvanically. Method according to one of claims 29 to 32, characterized in that a pulsed laser is used. Method according to claim 33, characterized that a pulsed solid-state laser is used. Method according to one of claims 29 to 34, characterized in that the laser beam at an angle α between 0 ° and 50 ° steered to the inner surface becomes. Process according to claim 35, characterized in that that the beam at an angle α between 25 ° and 35 ° is directed to the inner surface. Method according to one of claims 33 to 36, characterized in that the laser has a frequency of 50 is pulsed to 100 hertz. Method according to claim 37, characterized in that that the laser is pulsed at a frequency of 60 to 80 hertz.