CN110500360B

CN110500360B - Bearing sleeve for a charging device, bearing housing and charging device

Info

Publication number: CN110500360B
Application number: CN201810808704.XA
Authority: CN
Inventors: D·佩杜托; S·厄兹代米尔
Original assignee: BorgWarner Inc
Current assignee: BorgWarner Inc
Priority date: 2018-05-18
Filing date: 2018-07-17
Publication date: 2023-02-03
Anticipated expiration: 2038-07-17
Also published as: CN110500360A; DE102019112833A1; CN209430613U

Abstract

The invention relates to a bearing bush for a charging device and a bearing housing having such a bearing bush and a charging device having such a bearing housing. The bearing sleeve for the supercharging device comprises an outer peripheral surface, a first restraining portion and a second restraining portion. The first and second restraining portions respectively include first grooves circumferentially arranged on the outer peripheral surface. The respective first groove is circumferentially interrupted by at least one first blocking element.

Description

Bearing sleeve for a charging device, bearing housing and charging device

Technical Field

The invention relates to a bearing bush for a charging device and a bearing housing having such a bearing bush and a charging device having such a bearing housing.

Background

More and more new generation vehicles are equipped with turbines. To achieve the desired objectives and statutory requirements, it is necessary to drive development throughout the drive train and optimize the reliability and efficiency of the individual components and the overall system.

Known turbochargers have a turbine housing, a compressor housing and a bearing housing, which is usually connected to the turbine housing on the turbine side and to the turbocharger housing on the turbocharger side. In the bearing housing a shaft is mounted, on which a turbine wheel and a compressor wheel are mounted. The shaft, which is also referred to as a turbocharger rotor in combination with a turbine, is mounted in the radial and axial direction in a bearing housing. In most of the prior art turbochargers, a central radial bearing with a bearing sleeve is provided. In many cases, the conventional support sleeve has a plurality of continuous grooves for supplying oil, and a large amount of oil is supplied to the grooves. By means of the grooves and the disadvantageous drainage situation in this region, the risk of oil leakage and the power loss caused by oil flooding are increased. Also, each portion located in the shaft composite affects the profile clearance in the compressor and turbine, which ultimately affects the efficiency of the turbine and compressor.

Disclosure of Invention

It is an object of the present invention to provide a bearing bush for a turbocharger, which improves the oil supply and oil control.

The invention relates to a bearing bush, a bearing housing and a charging device.

The bearing sleeve for the supercharging device comprises an outer peripheral surface, a first restraining portion and a second restraining portion. The first and second restraining portions respectively include first grooves circumferentially arranged on the outer peripheral surface. The respective first groove is interrupted in the circumferential direction by at least one first blocking element. By means of this groove on the outer circumferential surface of the bearing bush, a supply groove for a fluid, in particular a coolant or a lubricant, in particular oil, is provided. This improves the cooling or lubrication of the bearing bush or the associated bearing. The blocking member acts to throttle the flow through the slot. Thus, the fluid throughput within the bearing sleeve may be limited. By means of the axial flanks of the grooves, the fluid can flow in both axial directions through the respective suppression section and thus obtain a cooling or lubricating effect there. Thus, a reduction in the axial throughput can be produced by the blocking element. The watering losses can be reduced and there is a reduced risk of leakage. In addition, flow losses and hydrodynamic friction power can be reduced. Overall, a reduction in coolant or lubricant flux can be achieved by the bearing sleeves of the present invention while maintaining efficient cooling or lubrication.

In an embodiment of the bearing sleeve according to the invention, the respective first groove can be interrupted in the circumferential direction by at least one second blocking element, so that the respective first groove extends in the circumferential direction between the respective first blocking element and the respective second blocking element.

In an embodiment that can be combined with the previous embodiment, the first restraining portion and the second restraining portion may each include one second groove disposed on the outer circumferential surface in the circumferential direction. The respective second groove is arranged adjacent to the respective first groove in the circumferential direction and extends between the respective first blocking element and the respective second blocking element. By providing two grooves and two blocking elements in the first and second suppression parts, respectively, the coolant or lubricant feed can be controlled in a targeted manner. An asymmetrical throttling or conveying can also be achieved in the circumferential direction and in the axial direction by a corresponding design of the corresponding groove and the corresponding blocking element. Thus, coolant control or lubricant control may be improved, which results in increased efficiency.

In embodiments that can be combined with any of the preceding embodiments, the first blocking member and/or the second blocking member, if present, can be integrally formed with the support sleeve. Alternatively or additionally, the respective first blocking element and/or, if present, the respective second blocking element closes flush in the radial direction with the respective restraining outer circumferential surface of the respective restraining part.

In an embodiment which can be combined with any of the preceding embodiments, the respective first groove and/or the respective second groove, if present, may each comprise one or more holes which extend in radial direction up to the inner circumferential surface of the bearing bush. By such a hole, an inner lubrication film, i.e., cooling or lubrication, can be provided on the inner peripheral surface of the bearing sleeve. In addition, the total fluid throughput, in particular the throughput between the outer circumferential surface and the inner circumferential surface, can be controlled by means of corresponding bores.

In an embodiment which can be combined with any of the preceding embodiments, the respective first groove and/or the respective second groove, if present, may be arranged substantially centrally in the axial direction within the respective suppression portion.

In an embodiment which can be combined with any of the preceding embodiments, the extension of the respective first groove in the circumferential direction may be less than 360 °, preferably less than 270 °, particularly preferably less than 180 °.

In an embodiment which can be combined with any of the preceding embodiments, the respective first groove and/or, if present, the respective second groove may at least partially coincide in the radial direction with a respective inflow groove of the bearing housing which surrounds the bearing shell in the mounted state.

In an embodiment that can be combined with any of the preceding embodiments, the first restraining portion and the second restraining portion may include a third groove and a third blocking member, respectively, that are circumferentially disposed on the outer circumferential surface. In this case, the respective third groove is arranged in the circumferential direction between the respective first groove and the respective second groove. In this case, the respective third groove extends in the circumferential direction between the respective first blocking element and the respective third blocking element. The first and second inhibiting portions may further include respective at least one other nth groove and respective at least one other mth blocking member. Here, the number n of slots is associated with the number m of blocking elements. The respective other nth groove is circumferentially arranged on the outer circumferential surface and circumferentially arranged between the respective first groove and the respective nth-1 groove. The respective further nth groove then extends in the circumferential direction between the respective first blocking element and the respective further mth blocking element.

In an embodiment which can be combined with any of the preceding embodiments, the design of the first groove of the first restraining part may be different from the design of the first groove of the second restraining part. In particular, the lengths of the first grooves extending in the circumferential direction may be different. Alternatively or additionally, the design of the second groove of the first inhibiting portion may be different from the design of the second groove of the second inhibiting portion, if provided. In particular, the length of the second groove extending in the circumferential direction may be different. Thus, by designing the groove accordingly, the fluid transport to the first suppression portion or the second suppression portion can be increased or decreased compared to the fluid transport to the respective other suppression portion. By creating different fluid transport conditions in the first and second restraining portions, a relatively strong coolant or lubricant action can be created in the desired bearing sleeve portion.

In an embodiment that can be combined with any of the preceding embodiments, the support sleeve may further comprise a connection section. The connecting section is arranged axially between the first and second restraining portions. In addition, the bearing sleeve can comprise at least one central opening which extends in the connecting section radially between the outer and inner circumferential surfaces.

In an embodiment that can be combined with any of the preceding embodiments, the bearing sleeve can be designed in two parts. Here, the bearing sleeve may include a first bearing sleeve portion and a second bearing sleeve portion. The first bearing sleeve part here comprises a first inhibiting part and a first connecting part of the connecting section. The second bearing sleeve part then comprises the second inhibiting portion and the second connecting part of the connecting section. The two-part design of the bearing bush brings processing-technical advantages. For example, tooling costs may be reduced by having less complexity in manufacturing the part product than when manufacturing a single piece.

The invention also relates to a bearing housing for a charging device. The support housing includes a support portion for supporting the drive shaft and first and second inflow grooves disposed on an inner circumferential surface of the support housing. The support portion comprises a support sleeve according to any preceding embodiment.

The invention also relates to a supercharging device. The booster device includes a compressor having a compressor wheel and a compressor housing. Furthermore, the supercharging arrangement comprises a drive shaft which is operatively coupled to the compressor wheel. The drive shaft is designed to be driven by a turbine in a turbine housing or by an electric motor. The drive shaft is here designed to be rotatably mounted in a bearing housing. Here, the bearing housing is a bearing housing according to one of the preceding embodiments.

Drawings

FIG. 1 shows a side cross-sectional view of a bearing housing according to the invention with a bearing sleeve according to the invention;

FIG. 2 shows an isometric view of the support sleeve of the present invention of FIG. 1;

FIG. 3A shows a partial cross-sectional view of the inventive bearing sleeve of FIG. 1 in the region of a first restraint section along section line B-B of the bearing shell of FIG. 1; an isometric view of the support sleeve of the present invention of FIG. 1 is shown;

FIG. 3B showsbase:Sub>A partial cross-sectional view of the inventive bearing sleeve of FIG. 1 in the region of the first restraint section along section line A-A of the bearing shell of FIG. 1; and

fig. 4 shows an isometric view of the bearing sleeve of the invention in the form of a two-piece design.

Detailed Description

In the context of the present application, the expressions "shaft" and "axial" relate to the shaft of the bearing bush; correspondingly, the axis of the drive shaft of the charging device mounted in the bearing housing or bearing sleeve is also referred to. Referring to fig. 1, the axial direction is indicated by reference numeral 22. Here, the radial direction 24 relates to the axis or axial direction 22. The circumferential surface or circumference 26 also relates to the shaft or axial direction 22.

Fig. 1 shows an exemplary bearing sleeve 10 for a charging device arranged in a bearing housing 20. The support sleeve 10 includes an outer peripheral surface 310, a first restraining portion 100, and a second restraining portion 200. The first restraining portion 100 and the second restraining portion 200 include

first grooves

130, 230, respectively, disposed on an outer circumferential surface 310 in the circumferential direction 26. Each

first groove

130, 230 is interrupted in the circumferential direction 26 by at least one first blocking element 140, 240 (see fig. 2). In other words, this means that the respective

first groove

130, 230 is interrupted in the circumferential direction 26 by the respective

first interruption member

140, 240. By means of the

grooves

130, 230 in the outer circumferential surface 310 of the bearing bush 10, supply channels for a fluid, in particular a coolant or a lubricant, in particular oil, can be provided. This improves the cooling or lubrication of the bearing bush 10 or of the associated bearing. The blocking

members

140, 240 throttle the flow through each of the

first slots

130, 230. Thus, the fluid flow within the bearing sleeve 10 may be limited or controlled. By means of the axial flanks of the respective

first grooves

140, 240, the fluid can flow through the

respective suppression section

100, 200 in both axial directions 22 and thus obtain a cooling or lubricating effect there. Thus, a reduction in axial fluid flow may be produced by the blocking

members

140, 240. Watering losses can be reduced and there is a reduced risk of leakage. In addition, flow losses and hydrodynamic friction power can be reduced. In general, a reduction in coolant or lubricant flux may be achieved by the bearing sleeve 10 of the present invention while maintaining efficient cooling or lubrication.

The outer circumferential surface 310 is the entire outer circumferential surface of the bearing sleeve 10. The outer circumferential surface 310 here includes the first restraining outer circumferential surface 110 of the first restraining part 100 and the second restraining outer circumferential surface 210 of the second restraining part 200. That is, the first groove 130 is disposed on the first suppressor outer circumferential surface 110 in the circumferential direction 26, and the first groove 230 is disposed on the second suppressor outer circumferential surface 210 in the circumferential direction 26. The first and

second suppression portions

100, 200 are sleeve-shaped portions of the bearing sleeve 10, which each have a larger outer circumference or a larger outer diameter in the circumferential direction 26 than the remainder of the bearing sleeve 10. One of the remaining portions is, for example, a connecting section 330 of the bearing sleeve 10, which extends in a sleeve-like manner in the axial direction between the first suppression part 100 and the second suppression part 200 (see fig. 2).

As shown in fig. 3A and 3B, each

first groove

130, 230 is interrupted in the circumferential direction 26 by at least one

second blocking member

160, 260. Thus, each

first groove

130, 230 extends in the circumferential direction 26 between each first blocking

member

140, 240 and each second blocking

member

160, 260. The first restraining part 100 and the second restraining part 200 include one

second groove

150, 250, respectively, which is arranged on the outer circumferential surface 310 in the circumferential direction 26 (see fig. 3A and 3B). The second groove 150 is disposed on the first suppressor outer circumferential surface 110 in the circumferential direction 26, and the second groove 250 is disposed on the second suppressor outer circumferential surface 210 in the circumferential direction 26. Each

second groove

150, 250 is arranged adjacent to the respective

first groove

130, 230 in the circumferential direction 260 and extends between the respective

first blocking element

140, 240 and the respective

second blocking element

160, 260. Thus, in other words, the respective

first groove

130, 230 may be separated or spaced apart in the circumferential direction 26 from the respective

second groove

150, 250 by the respective first and second blocking

members

140, 240, 160, 260. By providing the respective two

grooves

130, 230, 150, 250 and the respective two blocking

elements

140, 240, 160, 260 in the first suppression part 100 and the second suppression part 200, coolant or lubricant transport can be controlled in a targeted manner. An asymmetrical throttling or conveying in the circumferential direction 26 and in the axial direction 22 is also possible by a corresponding design of the

grooves

130, 230, 150, 250 and of the blocking

elements

140, 240, 160, 260. Coolant control or lubricant control can thus be improved, which leads to increased efficiency. In an alternative embodiment, only one of the two

restraint portions

100, 200 may include the

second groove

150, 250 and/or the

second blocking member

160, 260. Alternatively, the respective

second groove

150, 250 and/or the

second blocking element

160, 260 may also be arranged offset in the axial direction 22 with respect to the respective

first groove

130, 230.

As shown in particular in fig. 3A and 3B, the respective first blocking

member

140, 240 and/or the respective second blocking

member

160, 260 are integrally formed with the support sleeve 10. The respective

first blocking element

140, 240 and/or the respective

second blocking element

160, 260 is flush-closed in the radial direction 24 with the respective outer suppression

peripheral surface

110, 210 of the

respective suppression portion

100, 200. In alternative embodiments, one or both of the respective first blocking

elements

140, 240 and/or one or both of the respective

second blocking elements

160, 260 may extend in the radial direction 24 also over the respective outer suppression

peripheral surface

110, 210 of the

respective suppression portion

100, 200, or alternatively may extend radially 24 inwardly into the respective outer suppression

peripheral surface

110, 210 of the

respective suppression portion

100, 200. The radial depth of the respective blocking element is smaller than the radial depth of the respective groove. In alternative embodiments, one, more or all of the respective first blocking

elements

140, 240 and/or second blocking

elements

160, 260 may also be formed separately from the support sleeve 10. In the latter case, the respective first blocking

member

140, 240 and/or the respective second blocking

member

160, 260 may be encased in and coupleable with the support sleeve. In this case, the blocking

elements

140, 240, 160, 260 can be designed differently, in particular with different dimensions of extension in the circumferential direction 26.

In the exemplary embodiment of fig. 3A and 3B, the respective

first slot

130, 230 includes four

apertures

138, 238. The

bores

138, 238 extend in the radial direction 24 to the inner circumferential surface 320 of the bearing sleeve 10. The inner circumferential surface 320 here includes the first suppression inner circumferential surface 120 of the first suppression portion 100 and the second suppression inner circumferential surface 220 of the second suppression portion 200. That is, these holes 138 extend from the bottom surface 135 of the first groove 130 to the first restraining inner peripheral surface 120 in the radial direction 24. Similarly, a hole 238 extends from the bottom surface 235 of the second groove 230 in the radial direction 24 to the second restraining inner circumferential surface 220. The number of

holes

138, 238 of the respective

first groove

130, 230 is, for example, four in the embodiment shown. However, in alternative embodiments, more or less than four

apertures

138, 238 may be provided. The

first slots

130, 230 may also have a different number of

apertures

138, 238. In alternative embodiments, the respective

second groove

150, 250 may also have a plurality of bores, which extend in the radial direction 24 as far as the inner circumferential surface 320 of the bearing sleeve 10 (not shown). Similarly, the number of holes may also vary here. In embodiments where the second groove 150 includes a hole, the hole of the second groove 150 extends from the bottom surface 155 of the second groove 150 in the radial direction 24 to the first restraining inner circumferential surface 120. In embodiments where the second groove 250 includes a hole, the hole of the second groove 250 extends from the bottom surface 255 of the second groove 250 in the radial direction 24 to the second restraining inner circumferential surface 220. Through

such holes

138, 238, an internal lubrication film, i.e., cooling or lubrication, can be provided on the inner peripheral surface of the bearing sleeve 10. In addition, the total fluid flow, particularly between the outer circumferential surface 310 and the inner circumferential surface 320, may be controlled through the

respective apertures

138, 238.

The respective

first groove

130, 230 and the respective

second groove

150, 250 are arranged substantially centrally in the

respective suppression portion

100, 200 in the axial direction 22. Substantially centered herein refers to a position within the central 50% of the total axial length of the

respective suppression portions

100, 200 in the axial direction 22.

In the exemplary embodiment of the figures, the first slot 130 of the first inhibitor 100 extends over about 180 ° in the circumferential direction 26. The first groove 230 of the second suppression portion 200 extends through about 230 ° in the circumferential direction 26. This is an exemplary embodiment and should not be considered limiting. In alternative embodiments, the extent of the respective

first groove

130, 230 in the circumferential direction 26 may be less than 360 °, preferably less than 180 °. Particularly preferably, the respective

first groove

130, 230 extends in the circumferential direction 26 between 45 ° and 270 °. Similar applies to the respective

second grooves

150, 250 and possibly other grooves (see below).

As already mentioned, the bearing sleeve 10 can be enclosed by the bearing housing 20 in the mounted state. In the example shown in fig. 3A and 3B, the support case 20 includes

inflow grooves

21, 23 for the

respective suppression portions

100, 200, respectively. The

respective inflow groove

21, 23 here at least partially coincides with the respective

first groove

130, 230 in the radial direction 24. In an alternative embodiment, the

respective inflow groove

21, 23 may alternatively or additionally at least partially coincide with the respective

second groove

150, 250 in the radial direction 24. It is also conceivable that the

respective inflow groove

21, 23 alternatively or additionally at least partially coincides in the radial direction 24 with one or more of the blocking

elements

140, 240, 160, 260. The

respective inflow grooves

21, 23 are designed, for example, in the shape of a sickle (see fig. 3A and 3B). In alternative embodiments, however, other groove shapes can also be provided, or even no grooves can be provided, but only one

respective inflow opening

21a, 23a is provided, for example. The design of the

inflow mechanisms

21, 23, 21a, 23a in the

suppression portions

100, 200 may also be different.

In an alternative embodiment not shown here, the first restraining part 100 and the second restraining part 200 may each comprise a respective third groove and a respective third blocking member, which are arranged on the outer circumferential surface 310 in the circumferential direction 26. The respective third groove is arranged in the circumferential direction 26 between the respective

first groove

130, 230 and the respective

second groove

150, 250. In this case, the respective third groove extends in the circumferential direction 26 between the respective

first blocking element

140, 240 and the respective third blocking element. Further, the first and

second suppression portions

100 and 200 may include at least another (n) th groove and at least another (m) th blocking member, respectively. Here, the number of grooves (n) is associated with the number of blocking elements (m). The respective other (n) th groove is arranged on the outer circumferential surface 310 in the circumferential direction 26 and between the respective

first groove

130, 230 and the respective (n-1) th groove in the circumferential direction 26. The respective other (n) th groove extends in the circumferential direction 26 between the respective

first blocking element

140, 240 and the respective other (m) th blocking element.

The following detailed description of the aspects is described in connection with only one inhibitor: in the embodiment with more than two grooves and more than two blocking elements, the second groove accordingly extends in the circumferential direction between the first blocking element and the second blocking element, but also only from the second blocking element to the third blocking element, since the third groove extends in the circumferential direction from the third blocking element to the first blocking element. Similar considerations apply to other troughs and blockers when the total number of troughs is (n) and the total number of blockers is (m): the (n-1) th groove circumferentially adjoins and extends between the (n-2) th groove and the (n) th groove and circumferentially extends from the (m-1) th blocking member to the (m) th blocking member. The (n) th groove circumferentially adjoins and extends between the (n-1) th groove and the first groove and circumferentially extends from the (m) th blocking member to the first blocking member.

The respective third groove or the respective further groove can here be arranged offset in the axial direction 22 with respect to the respective

first groove

130, 230 and/or the respective

second groove

150, 250 and/or the respective (n-1) th groove, analogously to the above description for the respective

second groove

150, 250. By correspondingly varying the extent of the respective first, second and (n) th groove, in particular the respective first, second and (n) th groove, in the circumferential direction 26, the coolant or lubricant feed can be controlled in a targeted manner. An asymmetrical throttling or conveying can also be achieved in the circumferential direction 26 and in the axial direction 22 by a corresponding design of the respective first, second and (n) th grooves and the respective first, second and (m) th blocking elements. Coolant control or lubricant control can thus be improved, which leads to increased efficiency.

As described above, the design of the first groove 130 of the first suppression part 100 is different from the design of the first groove 230 of the second suppression part 200. Here, the first groove 130 of the first suppression portion 100 has a greater length in the circumferential direction 26 than the first groove 230 of the second suppression portion 200. However, in alternative embodiments, the

first grooves

130, 230 can also be identical in design. In an alternative embodiment, the design of the second groove 150 of the first suppression part 100 may also be different from the design of the second groove 250 of the second suppression part 200. In particular, the

second slots

150, 250 may extend different lengths in the circumferential direction 26. A similar situation applies to the possible third or further (n) th groove and the first, second, third and (m) th blocking member. In alternative embodiments, the grooves of the first and second inhibiting portions may also have different widths in the axial direction 22 and/or different depths in the radial direction 24. A correspondingly different design of the plurality of grooves in the suppression portion is also conceivable. By designing the

slots

130, 230, 150, 250 accordingly, fluid delivery to the first restraint 100 or the second restraint 200 may be increased or decreased as compared to fluid delivery to the respective

other restraints

100, 200. By creating different fluid transport conditions in the first and

second inhibition portions

100, 200, a stronger coolant or lubricant action may be created within the desired bearing sleeve portion.

As previously described, the support sleeve 10 also includes a connecting section 330 (see fig. 2). The connecting section 330 is arranged axially between the first suppression portion 100 and the second suppression portion 200. The support sleeve 10 also includes two central openings 338 (see fig. 1). The central opening 338 extends in the radial direction 24 between the outer circumferential surface 310 and the inner circumferential surface 320 within the connection section 330. The central opening ensures the return of the fluid. In alternative embodiments, the fluid return can also be achieved in other ways, for example by means of radial openings in another region of the bearing shell 10, by means of axial return or by means of more than two central openings 338. It is preferred that the fluid return is achieved through at least one central opening 338 arranged in the connecting section 330.

In a further embodiment, the bearing sleeve 10 can be designed in two parts (see fig. 4). The support sleeve 10 of fig. 4 corresponds to the support sleeve 10 of fig. 1-3B, except for a two-piece design. Here, like features are denoted by like reference numerals. The bearing sleeve 10 of fig. 4 comprises a first bearing sleeve part 11 and a second bearing sleeve part 12. The first bearing sleeve part 11 here comprises the first suppression part 100 and the first connection part 331 of the connection section 300. The second bearing sleeve part 12 here comprises the second inhibiting portion 200 and a second connecting part 332 of the connecting section 330. The first bearing sleeve part 11 and the second bearing sleeve part 12 can be fixedly coupled to one another here. The two-part design of the bearing shell 10 provides processing advantages. For example, tooling costs may be reduced by having less complexity in manufacturing the part product than when manufacturing a single piece.

The present invention includes a support housing 20 for a supercharging device (see fig. 1). The support housing 20 includes a support portion for supporting the drive shaft and a first inflow groove 21 and a second inflow groove 23 disposed on an inner circumferential surface 20a of the support housing 20. The support portion comprises a support shell 10 according to any of the previous embodiments. As already mentioned, the

inflow grooves

21, 23 are arranged axially such that, viewed in the radial direction 24, they at least partially coincide with the respective

first grooves

130, 230. The

inflow grooves

21, 23 are preferably arranged at the same axial position as the

first grooves

130, 230. Alternatively, however, the

inflow grooves

21, 23 can also be arranged offset in the axial direction with respect to the respective

first grooves

130, 230. The

respective inflow groove

21, 23 is preferably designed such that its respective length in the circumferential direction 26 corresponds at most to the length of the respective

first groove

130, 230 in the circumferential direction 26 and optionally also to the length of the respective

first blocking element

140, 240 in the circumferential direction 26 and/or of the respective

second blocking element

160, 260 in the circumferential direction 26. As already mentioned, the

respective inflow groove

21, 23 can likewise only coincide in the radial direction 24 with the respective

second groove

150, 250 and/or the respective third groove. It is also conceivable that the

respective inflow groove

21, 23 alternatively or additionally at least partially coincides in the radial direction 24 with one or more of the

respective blocking elements

140, 240, 160, 260. The cross section of the

respective inflow groove

21, 23 is designed, for example, in the shape of a sickle (see fig. 3A and 3B). In alternative embodiments, however, other groove shapes can also be provided, or even no grooves can be provided, but only one

respective inflow opening

21a, 23a is provided, for example. The design of the

inflow mechanisms

21, 23, 21a, 23a in the

suppression portions

100, 200 may be different from each other.

In the exemplary embodiment of fig. 3A and 3B, the bearing shell 10 is arranged in the bearing housing 20 in such a way that the

respective inflow groove

21, 23 coincides in the radial direction 24 with at least a part of the respective

first groove

130, 230 and is limited in its extension in the circumferential direction 26, so that the

inflow groove

21, 23 does not coincide in the radial direction 24 with at least a part of the respective

second groove

150, 250, preferably also with at least a part of the respective

first blocking element

140, 240 and/or with at least a part of the respective

second blocking element

160, 260. The bearing is designed as a sliding bearing in the example shown. However, in alternative embodiments, the bearing can also be designed as a rolling bearing.

The invention also relates to a supercharging arrangement (not shown). The booster device includes a compressor having a compressor wheel and a compressor housing. Furthermore, the supercharging arrangement comprises a drive shaft which is operatively coupled to the compressor wheel. The drive shaft is designed to be driven by a turbine in a turbine housing or by an electric motor. The supercharging arrangement also comprises a support housing. The drive shaft is here designed to be rotatably mounted in the bearing housing. Here, the bearing housing is the bearing housing 20 according to the invention of one of the preceding embodiments.

Claims

1. A bearing sleeve (10) for a supercharging device, comprising:

an outer peripheral surface (310);

a first restraining portion (100) and a second restraining portion (200) each including a first groove (130, 230) arranged on the outer peripheral surface (310) in a circumferential direction (26);

it is characterized in that the preparation method is characterized in that,

the respective first groove (130, 230) is interrupted in the circumferential direction (26) by at least one first blocking element (140, 240).

2. The support sleeve (10) of claim 1, wherein the respective first groove (130, 230) is interrupted in the circumferential direction (26) by at least one second blocking member (160, 260), such that the respective first groove (130, 230) extends in the circumferential direction (26) between the respective first blocking member (140, 240) and the respective second blocking member (160, 260).

3. The support sleeve (10) of claim 2, wherein the first restraining portion (100) and the second restraining portion (200) each include a second groove (150, 250) disposed circumferentially (26) on the outer peripheral surface (310) adjacent the respective first groove (130, 230) and extending between the respective first blocking member (140, 240) and the respective second blocking member (160, 260) circumferentially (26).

4. The support sleeve (10) of claim 1, wherein the first blocking member (140, 240) is integrally formed with the support sleeve (10).

5. The support sleeve (10) of claim 2 or 3, wherein the first blocking member (140, 240) and/or the second blocking member (160, 260) are formed integrally with the support sleeve (10).

6. The support sleeve (10) of claim 1, wherein the first blocking member (140, 240) is radially (24) flush with the respective restraining outer peripheral surface (110, 210) of the respective restraining portion.

7. The support sleeve (10) according to claim 2 or 3, characterized in that the first blocking element (140, 240) and/or the second blocking element (160, 260) are flush with the respective outer restraining peripheral surface (110, 210) of the respective restraining portion in the radial direction (24).

8. The support sleeve (10) of claim 1 or 2, characterized in that the first groove (130, 230) comprises one or more holes (138, 238) extending in a radial direction (24) up to an inner circumferential surface (320) of the support sleeve (10).

9. The support sleeve (10) of claim 3, characterized in that the first groove (130, 230) and/or the corresponding second groove (150, 250) each comprise one or more holes (138, 238) which extend in the radial direction (24) up to the inner circumferential surface (320) of the support sleeve (10).

10. The support sleeve (10) of claim 1 or 2, wherein the respective first groove (130, 230) is disposed centrally in the axial direction (22) within the respective restraint.

11. The support sleeve (10) of claim 3, wherein the respective first groove (130, 230) and/or the respective second groove (150, 250) is disposed centrally in the axial direction (22) within the respective restraint.

12. The support sleeve (10) of one of claims 1 to 3, characterized in that the respective first groove (130, 230) extends over less than 360 ° in the circumferential direction.

13. The support sleeve (10) according to one of claims 1 to 3, characterized in that the respective first groove (130, 230) extends over less than 270 ° in the circumferential direction.

14. The support sleeve (10) according to one of claims 1 to 3, characterized in that the respective first groove (130, 230) extends over less than 180 ° in the circumferential direction.

15. The bearing shell (10) according to claim 1 or 2, wherein the respective first groove (130, 230) coincides at least partially in the radial direction (24) with the respective inflow groove (21, 23) of the bearing housing (20) which surrounds the bearing shell (10) in the mounted state.

16. The bearing shell (10) according to claim 3, characterized in that the respective first groove (130, 230) and/or the respective second groove (150, 250) coincide at least partially in the radial direction (24) with a respective inflow groove (21, 23) of a bearing housing (20) which surrounds the bearing shell (10) in the mounted state.

17. The support sleeve (10) of claim 3, wherein the first restraining portion (100) and the second restraining portion (200) each comprise a third groove and a third blocking member, wherein the respective third groove is arranged in the circumferential direction (26) on the outer circumferential surface (310) and in the circumferential direction (26) between the respective first groove (130, 230) and the respective second groove (150, 250), and wherein the respective third groove extends in the circumferential direction (26) between the respective first blocking member (140, 240) and the respective third blocking member.

18. The support sleeve (10) of claim 17, wherein the first restraining portion (100) and the second restraining portion (200) each comprise at least one further nth groove and at least one further mth blocking member, wherein the number n of grooves and the number m of blocking members are related to each other, and wherein the respective further nth groove is arranged circumferentially (26) on the outer circumferential surface (310) and circumferentially (26) between the respective first groove (130, 230) and the respective nth-1 groove, and wherein the respective further nth groove extends circumferentially between the respective first blocking member (140, 240) and the respective further mth blocking member.

19. The bearing sleeve (10) according to claim 1 or 2, characterized in that the design of the first groove (130) of the first suppression portion (100) differs from the design of the first groove (230) of the second suppression portion (200) such that the fluid transport to the first suppression portion (100) or the second suppression portion (200) is correspondingly increased compared to the fluid transport to the respective other suppression portion.

20. The bearing sleeve (10) according to claim 3, characterized in that the design of the first groove (130) of the first suppression portion (100) differs from the design of the first groove (230) of the second suppression portion (200) and/or the design of the second groove (150) of the first suppression portion (100) differs from the design of the second groove (250) of the second suppression portion (200), so that the fluid transport to the first suppression portion (100) or the second suppression portion (200) is correspondingly increased compared to the fluid transport to the respective other suppression portion.

21. The support jacket (10) of claim 19, wherein the lengths of the first slots (130, 230) extending in the circumferential direction (26) are different from one another.

22. The support sleeve (10) of claim 20, wherein the lengths of the first slots (130, 230) extending in the circumferential direction (26) are different from one another.

23. The support sleeve (10) of claim 20, wherein the lengths of the second slots (150, 250) extending in the circumferential direction (26) are different from one another.

24. The support sleeve (10) of one of claims 1 to 3, characterized in that the support sleeve (10) further comprises a connecting section (330) disposed axially between the first suppression portion (100) and the second suppression portion (200).

25. The support sleeve (10) of claim 24, characterized in that the support sleeve (10) comprises at least one central opening (338) extending in the radial direction (24) between the outer circumferential surface (310) and the inner circumferential surface (320) of the support sleeve (10) in the connecting section (330).

26. The support sleeve (10) according to claim 24, characterized in that the support sleeve (10) is designed in two parts, wherein a first support sleeve part (11) comprises the first inhibiting portion (100) and the first connecting part (331) of the connecting section (330), and a second support sleeve part (12) comprises the second inhibiting portion (200) and the second connecting part (332) of the connecting section (330).

27. A support housing (20) for a supercharging device, comprising:

a support portion for supporting the drive shaft;

a first inflow groove (21) and a second inflow groove (23) which are arranged on the inner peripheral surface (20 a) of the support housing (20);

characterized in that the support comprises a support shell (10) according to one of claims 1 to 26.

28. A supercharging arrangement, comprising:

a compressor having a compressor wheel and a compressor housing;

a drive shaft which is operatively connected to the compressor wheel, wherein the drive shaft is designed to be driven by a turbine wheel in a turbine housing or by an electric motor, and wherein the drive shaft is rotatably supported in a bearing housing;

it is characterized in that the preparation method is characterized in that,

the bearing housing is a bearing housing (20) according to claim 27.