DE102014209642A1 - Bearing outer ring for a radial rolling bearing and radial rolling bearing - Google Patents

Abstract

A bearing outer ring (1) for a radial rolling bearing, in particular an exhaust gas turbocharger, has two axially spaced apart on an inner side (2) of the bearing outer ring (1) arranged first and second raceways (3 and 4) for guiding in each case a row of rolling elements of the radial roller bearing and at least two the bearing outer ring (1) radially penetrating, obliquely to a transverse plane A of the bearing outer ring (1) first and second spray oil holes (8, 9). In order to ensure a supply of rolling bearing rows of a arranged in a bearing housing of an exhaust gas turbocharger radial bearing with an oil in such a case in which at least one arranged on the bearing housing supply bore at least partially in a radially outside of a raceway (3, 4) arranged portion of the bearing outer ring (1 ), it is proposed with the invention that an inlet of at least the first and / or second spray oil bore (8, 9) provided on an outer lateral surface (5) of the bearing outer ring (1) is at least partially within an axial extent of the respective raceway (3, 4 ) and is oriented obliquely to the transverse plane A of the bearing outer ring (1), that with her in the region of the respective opposite end of the bearing outer ring (1) arranged Wälzkörperreihe (13 or 14) is directly acted upon by oil.

Description

The invention relates to a bearing outer ring for a double-row radial rolling bearing, in particular an exhaust gas turbocharger, with at least two axially spaced from each other on its inner side arranged first and second raceways for guiding one rolling element of the radial rolling bearing and at least two radially outwardly penetrating the bearing outer ring, obliquely to a transverse plane of the bearing outer ring running first and second spray oil holes.

Furthermore, the invention relates to a double-row radial rolling bearing, in particular for an exhaust gas turbocharger, with at least one bearing outer ring, at least one bearing inner ring and between these guided Wälzkörperreihen.

• – einem Lageraußenring, der zwei axial beabstandet voneinander an seiner Innenseite angeordnete erste und zweite Laufbahnen zum Führen von jeweils einer Wälzkörperreihe und wenigstens zwei den Lageraußenring radial durchdringende, schräg zu einer Querebene des Lageraußenringes verlaufende erste und zweite Spritzölbohrungen aufweist, und mit
• – wenigstens einem über die Wälzkörperreihen drehbar im Lageraußenring gelagerten Lagerinnenring.

In addition, the invention relates to a double-row radial rolling bearing, in particular for an exhaust gas turbocharger, with

• - A bearing outer ring having two axially spaced from each other on its inner side disposed first and second raceways for guiding one rolling element and at least two radially outwardly penetrating the bearing outer ring, extending obliquely to a transverse plane of the bearing outer ring first and second spray oil holes, and with
• - At least one on the Wälzkörperreihen rotatably mounted in the bearing outer ring bearing inner ring.

Furthermore, the invention relates to a bearing outer ring for a double-row radial rolling bearing, in particular an exhaust gas turbocharger, with at least two axially spaced from each other on an inner side of the bearing outer race arranged raceways for guiding one rolling element of the radial rolling bearing and at least two the bearing outer ring radially penetrating spray oil holes.

An exhaust-gas turbocharger of an internal combustion engine has a turbine wheel, a compressor wheel and a rotor shaft connecting the turbine wheel in a rotationally fixed manner to the compressor wheel. The rotor shaft is usually arranged rotatably in a housing of the turbocharger via at least one radial rolling bearing or radial plain bearing. A radial roller bearing for an exhaust gas turbocharger can be designed to accommodate radial and axial loads as a double-row shoulder ball bearings or angular contact ball bearings. A shoulder ball bearing has a usual for deep groove ball bearings training of the bearing inner ring, while the bearing outer ring is provided with a shoulder. In the angular ball bearing, on the other hand, both the bearing outer ring and the bearing inner ring are provided with shoulders. A fully assembled radial rolling bearing can be placed on a rotor shaft of an exhaust gas turbocharger. Subsequently, the assembly formed from the radial rolling bearing and the rotor shaft can be inserted into a housing of an exhaust gas turbocharger.

A bearing outer ring or a double-row radial roller bearing of the type described above is known from DE 10 2010 054 904 A1 known. This discloses a double-row radial roller bearing for an exhaust gas turbocharger with einpressbaren in a bearing housing of the exhaust gas turbocharger carrier rings, one of the support rings radially outer bearing ring and a rotatable about Wälzkörperreihen arranged in the bearing outer ring bearing inner ring. Such a construction of the double-row radial rolling bearing is also referred to as a bearing cartridge. The bearing outer ring comprises two axially spaced from each other on an inner side of the bearing outer ring arranged raceways for guiding one rolling element of the radial roller bearing and at least two the bearing outer ring radially penetrating, obliquely to a transverse plane of the bearing outer ring extending first and second spray oil holes. The spray oil holes are supplied with oil via supply bores and circumferential grooves formed in the housing of the exhaust gas turbocharger and the carrier ring, wherein the supply bores each open into the spray oil bores in a middle region of the bearing outer ring arranged between the raceways.

The object of the invention is to adapt radial rolling bearings to the respective position of supply holes in a housing of an exhaust gas turbocharger while ensuring adequate lubrication of the radial rolling bearing.

This object is solved by the independent claims. Advantageous embodiments are given in the dependent claims, which in themselves or in various combinations with each other can constitute an aspect of the invention.

The bearing outer ring according to the invention for a double-row radial rolling bearing, in particular an exhaust gas turbocharger comprises at least two axially spaced from each other on an inner side of the bearing outer ring arranged first and second raceways for guiding each of a rolling element of the radial rolling bearing and at least two the bearing outer ring radially penetrating, obliquely to a transverse plane extending first and second spray oil holes, wherein a provided on an outer circumferential surface of the bearing outer ring inlet at least the first and / or the second spray oil hole is at least partially within an axial extent of the respective track and extends obliquely to the transverse plane of the bearing outer ring, that with her arranged in the region of the opposite end of the bearing outer ring row of rolling elements can be acted upon directly with oil.

When arranging a radial roller bearing provided with the bearing outer ring according to the invention on a bearing housing of an exhaust gas turbocharger, a supply bore of an oil gallery arranged in the housing opens into each inlet of the respective spray oil bore provided on the outer lateral surface of the bearing outer ring. Since the supply bore and the inlet are at least partially provided in a radially lying to a raceway portion of the bearing outer ring, can be ensured with the bearing outer ring according to the invention a supply of at least one other row of rolling bearings arranged in the bearing housing of the exhaust gas turbocharger radial rolling bearing with oil in such a case. Oil can be injected directly in the direction of the rolling element row guided on the further raceway via the respective spray oil bore and its alignment, whereby the direct application of this rolling element row to oil takes place. Consequently, the two spray oil holes extend over a substantial part of lying between the two Wälzkörperreihen axial portion of the bearing outer ring, wherein the lubricating oil is supplied to the bearing outer ring in each case in the region of a rolling element and obliquely injected onto the rolling elements of the other row of rolling elements. From the manufacturer of the exhaust gas turbocharger usually a position of the oil gallery is specified, in which the corresponding oil holes with respect to the bearing outer ring receiving bore are relatively far out and are thus in the raceways of the bearing outer ring. By the aforementioned course of the spray oil holes these are guided past the respective career and directed to the other career.

In the bearing outer ring according to the invention, only a single spray oil hole must be formed on the bearing outer ring to supply a row of rolling a radial roller bearing, which is associated with a low production cost, especially in terms of burr formation, repeatability and the like, and a use of a lightweight bearing outer ring with a relatively small wall thickness allows. The preferably rectilinear spray oil hole also allows a good oil jet training, without a deflection of an oil flow in the spray oil well and without a hereby formed in the spray oil well Rückströmgebiet is formed, which could hinder the flow of oil through the spray oil hole and what with insufficient lubrication of a respective Wälzkörperreihe would go along

In an embodiment of a bearing outer ring or an arrangement of spray oil holes on the bearing outer ring accordingly DE 10 2010 054 904 A1 could be ensured no supply of Wälzkörperreihen the radial rolling bearing in such a case in which at least one arranged on the bearing housing supply bore opens at least partially in a radially outwardly of a raceway arranged portion of the bearing outer ring or in an axially adjacent thereto portion of the bearing outer ring. Rather, it is according to DE 10 2010 054 904 A1 Required that the supply holes and an entry into spray bores are sufficiently axially spaced from the raceways, that are arranged in a lying between the raceways middle region of the bearing outer ring.

According to an advantageous embodiment, two spray oil holes are provided and extend in the bearing outer ring circumferentially offset from one another. The circumferentially offset arrangement of the spray oil holes prevents the spray oil holes and / or outgoing oil jets cross, which would be associated with insufficient lubrication of Wälzkörperreihen.

The double-row radial roller bearing according to the invention, in particular for an exhaust gas turbocharger, comprises a bearing outer ring, at least one bearing inner ring and between them guided Wälzkörperreihen, wherein the bearing outer ring is formed according to one of the aforementioned embodiments or any combination thereof. With the double-row radial rolling bearing the advantages mentioned above with respect to the bearing outer ring are connected accordingly. The radial rolling bearing can be designed as a double-row shoulder ball bearing or angular contact ball bearings. The bearing inner ring can be constructed in one or two parts in the axial direction. The rolling elements of at least one row of rolling elements can be guided in a Wälzkörperkäfig. The rolling elements of at least one row of rolling elements may be formed as balls, rollers, barrels, needles or tapered rollers. Instead of the inner ring, a rotor shaft can be arranged to be rotatable in the bearing outer ring directly above the rows of rolling elements, wherein a corresponding outer contour with raceways is to be formed on the outer side of the rotor shaft.

• – einem Lageraußenring, der zwei axial beabstandet voneinander an einer Innenseite des Lageraußenrings angeordnete erste und zweite Laufbahnen zum Führen von jeweils einer Wälzkörperreihe und wenigstens zwei den Lageraußenring radial durchdringende, schräg zu einer Querebene des Lageraußenringes verlaufende, erste und zweite Spritzölbohrungen aufweist, und mit
• – wenigstens einem über die Wälzkörperreihen drehbar im Lageraußenring gelagerten Lagerinnenring, liegt ein an einer Außenmantelfläche des Lageraußenringes vorgesehener Eintritt zumindest der ersten und/oder zweiten Spritzölbohrung wenigstens teilweise innerhalb einer axialen Erstreckung der jeweiligen Laufbahn, wobei die jeweilige mit dem Eintritt kommunizierende Spritzölbohrung einen in Richtung der Mitte des Radialwälzlagers geneigten Verlauf aufweist und in eine am Lagerinnenring in Umfangsrichtung umlaufende Nut einmündet, die derart ausgebildet ist, dass mit ihr zumindest ein Teil eines aus der Spritzölbohrung austretenden Schmieröls in Richtung der an der ersten Laufbahn geführten Wälzkörperreihe zuführbar ist.

In the further double-row radial rolling bearing according to the invention, in particular for an exhaust gas turbocharger, with

• - A bearing outer ring, the two axially spaced from each other on an inner side of the bearing outer ring arranged first and second raceways for guiding each of a row of rolling elements and at least two radially outwardly penetrating the bearing outer ring, obliquely to one Transverse plane of the bearing outer ring extending, first and second spray oil holes, and with
• - At least one rotatably mounted on the Wälzkörperreihen in the bearing outer ring bearing inner ring, provided on an outer circumferential surface of the bearing outer ring entry at least the first and / or second spray oil hole is at least partially within an axial extent of the respective track, wherein the respective communicating with the inlet spray oil hole in the direction has the middle of the radial rolling bearing inclined course and opens into a circumferential groove on the bearing inner ring groove, which is designed such that at least a part of a leaking from the spray oil hole lubricating oil in the direction of the guided on the first raceway can be supplied with it.

An oil jet emerging from the spray oil bore can be deflected at least partially in the direction of the respective row of rolling elements by means of the groove arranged on the outside of the bearing inner ring in order to lubricate it. This also allows a supply of rolling bearing rows of arranged in a housing of an exhaust gas turbocharger radial bearing with oil in such a case done reliably, in which at least one arranged on the housing supply bore at least partially in a radially outwardly of a raceway arranged portion of the bearing outer ring or in an axial adjacent thereto portion of the bearing outer ring opens. It can also be both located on the outside of the bearing outer ring entries in spray oil holes at least partially within the extension of the respective career, in which case the spray oil holes have the aforementioned course and cooperate with the corresponding grooves of the bearing inner ring. Trained as a bearing cartridge radial roller bearing may be a double-row shoulder ball bearings or angular contact ball bearings. The bearing inner ring can be constructed in one or two parts in the axial direction. The rolling elements of at least one row of rolling elements can be guided in a Wälzkörperkäfig. The rolling elements of at least one row of rolling elements may be formed as balls, rollers, barrels, needles or tapered rollers. Instead of the inner ring, a rotor shaft can be arranged rotatably in the bearing outer ring directly above the rows of rolling elements, wherein on the outside of the rotor shaft, a corresponding outer contour with tracks and grooves is formed, as described above in connection with the bearing inner ring.

According to an advantageous embodiment, the groove on the one hand in the direction of the nearest track on a steadily increasing ramp and on the other hand on a side wall. An existing in the groove oil can flow by means occurring during operation of the radial rolling bearing centrifugal forces along the ramp in the direction of the nearest row of rolling elements to lubricate the row of rolling elements. An oil jet impinging on the side wall of the groove can at least partially rebound therefrom and be deflected directly in the direction of the row of rolling bodies to be lubricated. The ramp and / or the side wall can, seen in longitudinal section of the bearing inner ring, be formed straight or curved. In an advantageous manner, a radial overhang or an undercut can be formed on the outside of the bearing inner ring for catching and guiding the lubricating oil.

A further advantageous embodiment provides that the groove, seen in its cross section, has a rounded or angular profile. In this case, the side wall can extend with a radius or at an acute angle to the groove bottom.

According to a further advantageous embodiment, at least one, seen in cross-section of the bearing outer ring, annular projection is formed on the inside of the bearing outer ring, pointing in the direction of the respective row of rolling elements edge substantially in a plane with the side wall of the groove and in this way limits a lubricating oil space , Between the annular projection and the outer side of the bearing inner ring only a relatively narrow annular gap is present, can be largely prevented by the fact that oil flows directly axially along the bearing inner ring in the direction of a lubricating oil return. Instead, by the cooperation of the annular projection with the outside of the bearing inner ring, a lubricating oil space is limited and the oil flow is guided substantially in the direction of the next-lying rolling element row, whereby an optimal lubrication of this row of rolling elements is ensured. On the inside of the bearing outer ring and two corresponding annular projections may be arranged, which are each associated with one of the rows of rolling elements.

The further bearing outer ring according to the invention for a double-row radial rolling bearing, in particular an exhaust gas turbocharger, comprises two axially spaced from one another arranged on an inner side of the bearing outer raceways for guiding one rolling element of the radial rolling bearing, and at least two the bearing outer ring radially penetrating spray oil holes, wherein on an outer circumferential surface of the bearing outer ring at least a flattening surrounding an entry region of the spray oil bores is formed. A supply bore in the housing of the exhaust-gas turbocharger can open into a collection space formed by the flattening, which between the bearing outer ring and this directly surrounding bore of the housing or between the bearing outer ring and a surrounding this, be pressed into the housing support ring of the radial roller bearing is formed. The introduced into the flattening oil can flow axially along the bearing outer ring in the direction of a groove and are directed from there into the spray oil hole. It may also be on both outside on the outside of the bearing outer ring grooves each axially outside a corresponding flattening shoot.

The invention is not limited to the specified combination of the features of the independent claims and the dependent claims. In addition, there are further possibilities of combining individual features, in particular if they arise from the claims, the following description of the exemplary embodiments or directly from the figures. In addition, reference to the figures by the use of reference numerals is not intended to limit the scope of the claims to the illustrated embodiment examples.

Preferred embodiments of the invention will be explained in more detail with reference to the accompanying figures. These show:

1 a sectional view of an embodiment of a bearing outer ring according to the invention;

2 a side view of the in 1 shown bearing outer ring;

3 a perspective view of the in the 1 and 2 shown bearing outer ring;

4 a sectional view of an embodiment of a arranged in a housing of an exhaust gas turbocharger, inventive double-row radial rolling bearing;

5 a sectional view of a detail of in 4 shown radial roller bearing;

6 a sectional view of another embodiment of a arranged in a bearing housing of an exhaust gas turbocharger, inventive double-row radial rolling bearing;

7 a sectional view of a detail of in 6 shown double row radial rolling bearing;

8th a sectional view of another embodiment of a arranged in a bearing housing of an exhaust gas turbocharger, inventive radial roller bearing;

9 a sectional view of a detail of in 8th shown radial roller bearing;

10 a perspective view of another embodiment of a bearing outer ring according to the invention.

In the figures, functionally identical components are provided with the same reference numerals.

1 shows a sectional view of an embodiment of a bearing outer ring according to the invention 1 for a not shown radial roller bearing of an exhaust gas turbocharger. The bearing outer ring 1 comprises two axially spaced from each other on an inner side 2 of the bearing outer ring 1 arranged raceways 3 and 4 for guiding in each case one rolling element row, not shown, of the radial rolling bearing. Furthermore, the bearing outer ring comprises 1 two axially spaced from each other on an outer circumferential surface 5 of the bearing outer ring 1 arranged, circumferentially circumferential grooves 6 and 7 , Furthermore, the bearing outer ring comprises 1 two the bearing outer ring 1 penetrating, obliquely to the transverse plane A extending spray oil holes 8th and 9 , communicating with a single circumferential groove 6 respectively. 7 of which in 1 only one spray oil hole 8th is shown.

The first circumferential groove 6 lies in an axial region of the bearing outer ring 1 that she is the first career 3 partially radially surrounding, with the first circumferential groove 6 communicatively connected first spray oil well 8th such obliquely to the transverse plane A of the bearing outer ring 1 is aligned with that one with her on the second career 4 Guided row of rolling elements directly acted upon by oil, so it is anspritzbar. The second circumferential groove 7 is also in this way to the second career 4 arranged so that in the sectional view according to 1 not shown second spray oil hole 9 that with the circumferential groove 7 communicates, so obliquely to the transverse plane A should run that with her one at the first career 3 Guided Wälzkörperreihe can be acted upon directly with oil. The spray oil holes 8th and 9 are circumferentially offset from each other on the bearing outer ring 1 arranged as it is in 2 is shown.

2 shows a side view of the in 1 shown bearing outer ring 1 , It is the circumferentially offset arrangement of the spray oil holes 8th and 9 to see.

3 shows a perspective view of the in the 1 and 2 shown bearing outer ring 1 ,

4 shows a sectional view of an embodiment of a in a housing 10 an exhaust gas turbocharger 11 arranged, inventive double-row radial roller bearing 12 , The radial rolling bearing 12 includes a bearing outer ring 1 at least two axially spaced from each other on an inner side 2 of the bearing outer ring 1 arranged raceways 3 and 4 for guiding one row of rolling elements in each case 13 respectively. 14 having. Furthermore, in the bearing outer ring 1 , two axially spaced from each other on the outer circumferential surface 5 arranged, circumferentially circumferential grooves 6 and 7 and two obliquely to the transverse plane A of the bearing outer ring 1 extending, communicating, each with a single circumferential groove 6 respectively. 7 connected spray oil holes 8th and 9 intended. The radial rolling bearing 12 further includes one over the rows of rolling elements 13 and 14 rotatable in the bearing outer ring 1 arranged, two-piece bearing inner ring 15 , The spherical rolling elements 16 the rows of rolling elements 13 and 14 are each in a Wälzkörperkäfig 17 respectively. 18 guided. In the case 10 is an oil gallery 25 with two supply holes 26 and 27 arranged, each in a circumferential groove 6 respectively. 7 on the outside 5 of the bearing outer ring 1 lead.

The circumferential grooves 6 and 7 each run in such a way that they partially due to their location the careers 3 respectively. 4 enclose radially. Therefore, there are problems, the spray holes 8th and 9 to arrange such that the rolling elements 16 frontally of the two rows of rolling elements 13 and 14 be sprayed. The with the respective groove 6 respectively. 7 communicatively connected spray oil hole 8th respectively. 9 therefore runs, starting from the respective circumferential groove 6 respectively. 7 and with respect to the transverse plane A, with a displacement obliquely towards the center of the bearing outer ring 1 , Here is each of the spray oil holes 8th respectively. 9 on one on an outside 18 of the bearing inner ring 15 trained, circumferentially circumferential groove 19 respectively. 20 directed. These grooves 19 and 20 are formed such that with them at least a part of the respective spray oil hole 8th respectively. 9 departing towards the direction of the respective career 3 respectively. 4 guided rolling element row 13 respectively. 14 is deflectable.

Each on the outside 18 of the bearing inner ring 15 arranged groove 19 respectively. 20 has one of the groove bottom in the direction of the closest to the respective groove 19 respectively. 20 arranged rolling element row 13 respectively. 14 steadily rising ramp 21 respectively. 22 and a side wall 23 respectively. 24 on. The respective side wall 23 respectively. 24 runs under a radius to the bottom of the groove.

5 shows a sectional view of a detail of in 4 shown radial roller bearing 12 in the area of the rolling element row 13 , It is in particular the structure of the circumferential groove 6 of the bearing outer ring 1 and the groove 19 of the bearing inner ring 15 better to recognize.

6 shows a sectional view of another embodiment of a in a bearing housing 10 an exhaust gas turbocharger 11 arranged, inventive radial roller bearing 12 , which except for the design of the grooves 19 and 20 according to the in the 4 and 5 shown radial roller bearings 12 is trained. The grooves 19 and 20 have a triangular cross-section. The side walls 23 respectively. 24 the grooves 19 respectively. 20 run at an acute angle to the bottom of the groove.

7 shows a sectional view of a detail of in 6 shown radial roller bearing 12 in the area of the rolling element row 13 , It is in particular the structure of the circumferential groove 6 of the bearing outer ring 1 and the groove 19 of the bearing inner ring 15 better to recognize.

8th shows a sectional view of another embodiment of a in a bearing housing 10 an exhaust gas turbocharger 11 arranged, inventive radial roller bearing 12 , which except for the design of the grooves 19 and 20 and the additional arrangement of two annular projections 28 and 29 on the inside 2 of the bearing outer ring 1 according to the in the 4 and 5 respectively. 6 and 7 shown radial roller bearings 12 is trained. The grooves 19 and 20 in this case have a triangular cross-section. The side walls 23 respectively. 24 the grooves 19 respectively. 20 run as already to the 6 and 7 explained. Each annular projection 28 respectively. 29 has one in the direction of the adjacent row of rolling elements 13 respectively. 14 pointing flank 28a . 29a on, which essentially wall in one plane with the respective sides 23 respectively. 24 runs. Therefore, the grooves form 19 respectively. 20 together with the annular projections each have a lubricating oil space.

9 shows a sectional view of a detail of in 8th shown radial roller bearing 12 in the area of the rolling element row 13 , It is in particular the structure of the groove 19 and the annular projection 28 better to recognize.

10 shows a shows a perspective view of another embodiment with a bearing outer ring according to the invention 1 for a not-shown radial roller bearing of an exhaust gas turbocharger, wherein the exhaust gas turbocharger a housing 10 according to the 4 to 9 can have. The bearing outer ring 1 comprises two axially spaced from each other on an inner side 2 of the bearing outer ring 1 arranged raceways 3 of which in the presentation of the 10 just a career 3 is visible. This career 3 serves to guide a rolling element row of the not shown Radial rolling bearing. Furthermore, the bearing outer ring comprises 1 two axially spaced from each other on an outer circumferential surface 5 of the bearing outer ring 1 arranged, circumferentially circumferential grooves 6 and 7 , From these circumferential grooves 6 and 7 go each injection oil holes 8th and 9 out. On the outer surface 5 of the bearing outer ring 1 are two flattenings 30 and 31 formed, each with a groove 6 respectively. 7 communicating with each other, wherein each circumferential groove 6 respectively. 7 axially outside a flattening 30 respectively. 31 borders. With offset of the circumferential grooves 6 respectively. 7 to the corresponding supply holes 26 and 27 the oil gallery 25 in the longitudinal direction, however, the lubricating oil on the flats in the circumferential grooves 6 respectively. 7 and thus into the spray oil wells 8th respectively. 9 reach.

LIST OF REFERENCE NUMBERS

1

Bearing outer ring

2

inside

3

career

4

career

5

Outer casing surface

6

circumferential groove

7

circumferential groove

8th

Oil-drilling

9

Oil-drilling

10

casing

11

turbocharger

12

radial bearings

13

rolling body row

14

rolling body row

15

Bearing inner ring

16

rolling elements

17

Rolling Element

18

Rolling Element

19

groove

20

groove

21

ramp

22

ramp

23

Umlenkflanke

24

Umlenkflanke

25

oil gallery

26

supply hole

27

supply hole

28

head Start

28a

flank

29

head Start

29a

flank

30

flattening

31

flattening

32

outside

A

transverse plane

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102010054904 A1 [0006, 0012, 0012]

Claims (10)

Bearing outer ring ( 1 ) for a double row radial rolling bearing ( 12 ), in particular an exhaust gas turbocharger ( 11 ), with two axially spaced from each other on its inside ( 2 ) arranged first and second raceways ( 3 and 4 ) for guiding one row of rolling elements ( 13 . 14 ) of the radial rolling bearing ( 12 ), and at least two of the bearing outer ring ( 1 ) radially penetrating, obliquely to a transverse plane of the bearing outer ring ( 1 ), first and second spray oil wells ( 8th and 9 ), characterized in that a on an outer circumferential surface of the bearing outer ring ( 1 ) provided entry of at least the first and / or second spray oil well ( 8th . 9 ) at least partially within an axial extent of the respective raceway ( 3 . 4 ) and obliquely to the transverse plane (A) of the bearing outer ring ( 1 ) is aligned aligned that with her in the region of the respective opposite end of the bearing outer ring ( 1 ) arranged rolling element row ( 13 or 14 ) can be acted upon directly with oil. Bearing outer ring ( 1 ) according to claim 1, characterized in that two spray oil holes ( 8th and 9 ) are provided and extend circumferentially offset from each other in the bearing outer ring. Bearing outer ring ( 1 ) according to claim 1, characterized in that the respective entry into the respective spray oil bore spray oil bore ( 8th . 9 ) as a radially outer circumferential groove ( 6 . 7 ) and / or as a flattening ( 30 . 31 ) is trained. Double Row Radial Roller Bearing ( 12 ), in particular for an exhaust gas turbocharger ( 11 ), with at least one bearing outer ring ( 1 ), at least one bearing inner ring ( 15 ) and between these guided rows of rolling elements ( 13 . 14 ), characterized in that the bearing outer ring ( 1 ) is designed according to one of claims 1 to 3. Double Row Radial Roller Bearing ( 12 ), in particular for an exhaust gas turbocharger ( 11 ), with - a bearing outer ring ( 1 ), the two axially spaced from each other on its inside ( 2 ) arranged first and second raceways ( 3 and 4 ) for guiding one row of rolling elements ( 13 . 14 ) and at least two of the bearing outer ring ( 1 ) radially penetrating, obliquely to a transverse plane of the bearing outer ring ( 1 ) running first and second spray oil holes ( 8th and 9 ), and with - at least one of the rows of rolling elements ( 13 and 14 ) rotatable in the bearing outer ring ( 1 ) mounted bearing inner ring ( 15 ), characterized in that a on an outer circumferential surface of the bearing outer ring ( 1 ) provided entry of at least the first and / or second spray oil well ( 8th . 9 ) at least partially within an axial extent of the respective raceway ( 3 . 4 ), wherein the respective injection oil bore communicating with the inlet ( 8th . 9 ) one in the direction of the center of the radial rolling bearing ( 12 ) inclined course and in one on the bearing inner ring ( 15 ) circumferentially circumferential groove ( 19 . 20 ), which is designed in such a way that at least part of it from the spray oil bore ( 8th . 9 ) leaking lubricating oil in the direction of the first track ( 3 . 4 ) guided rolling element row ( 13 . 14 ) can be fed. Double Row Radial Roller Bearing ( 12 ) according to claim 5, characterized in that the groove ( 19 . 20 ) on the one hand in the direction of the nearest career ( 3 . 4 ) a steadily rising ramp ( 21 . 22 ) and on the other hand a side wall ( 23 . 24 ) having. Double Row Radial Roller Bearing ( 12 ) according to claim 6, characterized in that the side wall ( 23 . 24 ) runs with a radius to the groove bottom. Double Row Radial Roller Bearing ( 12 ) according to one of claims 5 to 7, characterized in that the side wall ( 23 . 24 ) runs at an acute angle to the groove bottom. Double Row Radial Roller Bearing ( 12 ) according to one of claims 4 to 7, characterized in that on the inside ( 2 ) of the bearing outer ring ( 1 ) at least one, in cross-section of the bearing outer ring ( 1 ), annular projection ( 28 . 29 ) is formed, whose in the direction of the respective rolling element row ( 13 . 14 ) pointing flank ( 28a . 29a ) substantially in a plane with the side wall of the groove ( 19 . 20 ) and limits a lubricating oil space. Bearing outer ring ( 1 ) for a double row radial rolling bearing ( 12 ), in particular an exhaust gas turbocharger ( 11 ), with two axially spaced from each other on an inner side ( 2 ) of the bearing outer ring ( 1 ) arranged raceways ( 3 . 4 ) for guiding in each case one rolling body row ( 13 . 14 ) of the radial rolling bearing ( 12 ) and at least two of the bearing outer ring ( 1 ) radially penetrating spray oil holes ( 8th . 9 ), characterized in that on an outer circumferential surface ( 5 ) of the bearing outer ring ( 1 ) at least one an entry region of the spray oil holes ( 8th . 9 ) surrounding or to a circumferential groove ( 6 . 7 ) adjacent flattening ( 30 . 31 ) is trained.

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