CN112648292B

CN112648292B - Cage, rolling bearing, gas turbine, and method for manufacturing rolling bearing

Info

Publication number: CN112648292B
Application number: CN201910962971.7A
Authority: CN
Inventors: 李佳琪; 韩宁; 王军
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2022-02-08
Anticipated expiration: 2039-10-11
Also published as: CN112648292A

Abstract

The invention relates to a retainer, a rolling bearing, a gas turbine, and a method for manufacturing the rolling bearing. Wherein the cage includes a pocket for accommodating the rolling element, the pocket has a first sidewall and a second sidewall in a circumferential direction, an accommodating space for accommodating the rolling element is provided between the first sidewall and the second sidewall, the first sidewall is located before the second sidewall in a rotational direction of the cage, wherein the cage further includes: the stopper is arranged on the first side wall and provided with an arc-shaped surface, and the arc-shaped surface is used for keeping line contact with the rolling body; and an elastic member provided on the second side wall, the elastic member applying an elastic force to the rolling element to move the rolling element in a rotational direction of the cage. The retainer, the rolling bearing, the gas turbine and the oil drainage method have the advantages of reliable performance, long service life and the like.

Description

Cage, rolling bearing, gas turbine, and method for manufacturing rolling bearing

Technical Field

The invention relates to a retainer, a rolling bearing, a gas turbine, and a method for manufacturing the rolling bearing.

Background

Modern aircraft engines are developing towards large thrust-weight ratios, low fuel consumption, high reliability, high durability, and the like. With the continuous improvement of the performance of the aero-engine, the thrust-weight ratio and the rotating speed of a rotor are continuously increased, and the requirements on the performance of the bearing are higher and higher. The bearing is used as a key part of the aircraft engine and is a weak link of the aircraft engine, and the reliability and the service life of the aircraft engine are directly influenced by the performance of the bearing. With the progress and development of aeronautical science and technology, higher requirements are put forward on the structural design, the lubricating method, the tribology theory and the like of the bearing. At present, the DN value of the bearing is increased due to the increase of the rotating speed of the engine and the diameter of the main shaft. For the rolling element bearing, under the condition of a high DN value, the spinning speed of the rolling elements in the pockets is increased, the friction between the rolling elements and the retainer is intensified, and the frictional heat generation is increased. On the other hand, the rolling element bearing under high-speed rotation may also generate vibration along its own axis, so as to drive the retainer to be in an unstable operation condition, the unstable operation of the retainer leads to the aggravation of vibration and the deterioration of stability of the rolling element bearing, and the serious result of bearing seizure and further damage of the aero-engine is further caused.

When the aeroengine rolling element bearing actually runs, for the bearing guided by the inner ring, the rolling element is firstly driven by the inner ring of the bearing to rotate, and the retainer is driven by acting force generated between the rib of the inner ring and the guide surface of the retainer. The rolling bodies in the pocket holes of the retainer touch the edge of the retainer and generate sliding friction. Because the bearing on the high-pressure rotating shaft of the aircraft engine has higher working rotating speed, the heat generated by the sliding friction between the rolling body and the retainer is also higher. Therefore, it can be found that the friction and wear between the rolling element of the rolling element bearing of the aircraft engine and the retainer is serious, and after the wall surface of the retainer is partially worn, the contact mode of the rolling element and the wall surface of the retainer is changed from linear contact friction to surface contact friction, so that the failure of the bearing is easily caused, and even the normal operation of the aircraft engine is caused.

In summary, the conventional aeroengine rolling element bearing mainly has the following f point deficiency

1. The friction and wear conditions of the rolling body and the retainer in the bearing retainer are severe, particularly under the long-time collision and wear action, the wall surface of the retainer is worn, so that the friction and wear of the rolling body and the retainer are further aggravated, the stable operation of the bearing is further influenced, the bearing is easily excessively worn and even fails, or the temperature rise of the bearing caused by friction is high;

2. because the rolling bodies have a clearance with the cage in the pockets, the clearance causes slight deflection of the rolling bodies during operation, and the deflection may cause the cage not to operate stably, thereby affecting the operation safety of the bearing.

Therefore, there is a need in the art for a cage, a rolling bearing, a gas turbine, a method for manufacturing a rolling bearing, and a method for holding a rolling element, which can improve the reliability of the rolling bearing and the gas turbine by allowing stable operation between the rolling element and the cage.

Disclosure of Invention

One object of the present invention is to provide a cage.

Another object of the present invention is to provide a rolling bearing.

It is another object of the present invention to provide a gas turbine.

Another object of the present invention is to provide a method of manufacturing a rolling bearing.

Another object of the present invention is to provide a method of holding a rolling element.

A cage according to an aspect of the present invention, for a rolling bearing, includes a pocket for accommodating rolling bodies, the pocket having a first sidewall and a second sidewall in a circumferential direction, an accommodating space for accommodating the rolling bodies being provided between the first sidewall and the second sidewall, the first sidewall being located before the second sidewall in a rotational direction of the cage, wherein the cage further includes: the stopper is arranged on the first side wall and provided with an arc-shaped surface, and the arc-shaped surface is used for keeping line contact with the rolling body; and an elastic member provided on the second side wall, the elastic member applying an elastic force to the rolling element to move the rolling element in a rotational direction of the cage.

In one or more embodiments of the retainer, the resilient member includes a first resilient member and a second resilient member, the first resilient member being closer to a midpoint of a radial width of the second sidewall than the second resilient member.

In one or more embodiments of the retainer, the retainer has a plurality of second elastic members, and the plurality of second elastic members include two second elastic members respectively disposed at equal radial intervals on the radially inner and outer sides of the first elastic member.

In one or more embodiments of the retainer, the elastic force directions of the two second elastic members are respectively 5 to 10 degrees of included angles between the elastic force direction of the second elastic member arranged on the radial outer side of the first elastic member and the tangential direction, and 5 to 10 degrees of included angles between the elastic force direction of the second elastic member arranged on the radial inner side of the first elastic member and the tangential direction are radial inward directions.

In one or more embodiments of the cage, the elastic member has a force application surface and an elastic element, one side of the force application surface is used for being in direct contact with the rolling body, and the other side of the force application surface is connected with the elastic element; the second side wall is provided with a second groove, the elastic piece is arranged in the groove, and the force application surface protrudes out of an opening of the second groove.

In one or more embodiments of the cage, the stops include a first stop and a second stop spaced axially of the cage.

In one or more embodiments of the retainer, the stopper has an arc-shaped surface and a rigid supporting column, one side of the arc-shaped surface is used for directly contacting with the rolling body, and the other side of the arc-shaped surface is connected with the supporting column; a first groove is formed in the first side wall, the supporting columns are mounted in the grooves, and the arc-shaped face protrudes out of the opening of the first groove.

In one or more embodiments of the cage, the axial distance between the axial ends of the pockets adjacent to the axial ends of the first stopper and the axial distance between the axial ends of the second stopper and the axial ends of the pockets adjacent to the axial ends of the first stopper and the axial distances between the axial ends of the second stopper and the axial ends of the pockets adjacent to the axial ends of the second stopper are one fourth of the axial width of the pockets.

In one or more embodiments of the cage, the equivalent radius of curvature of the arcuate surface is equal to the equivalent radius of curvature of the rolling element in line contact therewith.

A rolling bearing according to another aspect of the present invention includes: an inner ring, an outer ring, rolling elements and the cage of any of the above.

According to another aspect of the invention, a gas turbine comprises a shaft and said rolling bearing.

According to another aspect of the present invention, a method of manufacturing a rolling bearing is provided.

A method of holding a rolling element of a rolling bearing according to another aspect of the present invention includes:

when the rolling body is contacted with the side wall of the retainer, the rolling body is continuously in ground line contact with the retainer at the front side of the rotation direction of the retainer;

when the rolling body and the retainer move or deflect in the circumferential direction, the rolling body is reset under the action of elastic force on the rear side of the rotation direction of the retainer.

The invention has the following advanced effects: the first side wall of the pocket is provided with the stopper which keeps line contact with the rolling body, so that the actual contact area between the rolling body and the wall surface of the retainer can be effectively reduced, the friction and the wear between the rolling body and the wall surface of the retainer are reduced, and the bearing performance is improved; on the other hand, the second lateral wall in pocket hole is equipped with the elastic component, can effectively alleviate the rolling element in the unstable rocking of pocket hole and circumference drunkenness. The device not only can reduce the friction loss between rolling element and the holder, but also can more steady operation of the rolling element in the pocket hole, thereby prolonging the service life of the bearing and leading the gas turbine to operate stably and reliably.

Drawings

The above and other features, nature, and advantages of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings in which like reference characters refer to like features throughout, it being noted that the drawings are given by way of example only and are not to scale, and should not be taken as limiting the scope of the invention which is actually claimed, wherein:

fig. 1 is a schematic structural view of a cage-mounted rolling element of a rolling bearing according to one or more embodiments;

fig. 2 is a schematic structural view of a cage of a rolling bearing according to one or more embodiments;

FIG. 3 is an enlarged, partial cross-sectional structural view of a cage according to one or more embodiments;

FIG. 4 is a schematic top view from the perspective of the stopper of FIG. 3;

fig. 5 is an enlarged schematic view of the elastic member according to fig. 3.

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.

Further, it is to be understood that the positional or orientational relationships indicated by the terms "front, rear, upper, lower, left, right", "transverse, vertical, horizontal" and "top, bottom" and the like are generally based on the positional or orientational relationships illustrated in the drawings and are provided for convenience in describing the invention and for simplicity in description, and that these terms are not intended to indicate and imply that the referenced devices or elements must be in a particular orientation or be constructed and operated in a particular orientation without departing from the scope of the invention. Also, this application uses specific language to describe embodiments of the application. The terms "inside" and "outside" refer to the inner and outer parts relative to the outline of each part itself, and the terms "first" and "second" are used to define the parts, and are used only for the convenience of distinguishing the corresponding parts, and the terms do not have any special meaning unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

The rolling bearing of the following embodiment, in which the gas turbine is exemplified by an aircraft engine, includes an inner ring, an outer ring, rolling elements exemplified by cylindrical rollers, and a cage.

It is noted that the axial, circumferential and radial directions of the embodiments described below are all referenced to the axial, circumferential and radial directions of the cage.

As shown in fig. 1 and 2, a pocket 101 of a cage 1 of the rolling bearing accommodates rolling elements 2. Referring to fig. 3, in an embodiment, the pocket 101 has a first sidewall 1011 and a second sidewall 1012 in the circumferential direction, the first sidewall 1011 and the second sidewall 1012 provide a receiving space 100 for receiving the rolling element 2, and the first sidewall 1011 is located before the second sidewall 1012 in the rotation direction of the cage 1, for example, the rotation direction of the cage 1 in fig. 3 is the counterclockwise direction, so that the first sidewall 1011 is located at the circumferential position where the second sidewall 1012 rotates by an angle in the counterclockwise direction. The retainer 1 further comprises a stopper 3 and an elastic member 4. The stopper 3 is disposed on the first sidewall 1011 and has an arc surface 300, and the arc surface 300 is used for keeping line contact with the rolling element 2. The elastic member 4 is provided on the second side wall 1012 and applies an elastic force to the rolling elements 2 to move the rolling elements in the rotational direction of the cage 1. The beneficial effect of the arrangement is that the stopper 3 is arranged on the first side wall 1011 of the front end of the pocket 101 in the rotation direction of the retainer 1, so that the actual contact area between the rolling body 2 and the wall surface of the retainer 1 can be effectively reduced, the friction and the abrasion between the rolling body and the wall surface of the retainer 1 can be reduced, and the bearing performance can be improved; an elastic member is provided on the second side wall 1012 at the rear end of the pocket 101 in the rotational direction, and prevents the rolling elements 2 from being deflected and moving in the circumferential direction. The principle of the method is that, in practice, without the stopper 3 and the elastic element 4, when the bearing operates, although the friction between the rolling element 2 and the side wall of the cage 1 is initially formed by the linear contact friction between the cylinder and the plane through the design of the side wall, when the contact wall surface of the rolling element 2 and the cage 1 is slightly worn after the bearing operates for a long time, the contact area between the rolling element 2 and the side wall is gradually increased, even the surface contact friction phenomenon occurs, so that the wear between the rolling element 2 and the wall surface is further increased, and finally the excessive wear of the side wall 1011 of the pocket 101 at the front end of the cage 1 in the rotation direction occurs, so that the stopper 3 with the arc-shaped surface 300 is arranged on the first side wall 1011, so that the linear contact friction between the cylinder and the plane of the cylindrical roller is changed into the linear contact friction between the cylindrical roller and the arc-shaped surface 300, thereby effectively improving the friction and wear condition between the two. The axis of the arc-shaped surface 300 is located on the side of the arc away from the pocket, and may be made of wear-resistant material, such as metal wear-resistant material like cemented carbide, non-gold wear-resistant material like high molecular weight polyethylene, ceramics, etc., to further improve the service life of the stopper 3. On the other hand, the roller 2 revolves around the axial direction as the center, and on the other hand revolves around the axis of the roller in the pocket 101, the roller also deflects and moves circumferentially, and the elastic part 4 and the stopper 3 cooperate with each other, so that the circumferential movement of the roller in the pocket 101 can be effectively relieved. The stopper and the elastic piece are arranged, so that the reliability of the rolling bearing is improved, the problem that the rolling bearing of the aero-engine breaks down after long-time operation is avoided, and the overall reliability of the aero-engine is improved.

Referring to fig. 2-4, in one embodiment, the flight 3 includes a first flight 301 and a second flight 304 spaced axially of the cage 1. In an embodiment, referring to fig. 4, taking the first stopper 301 as an example, the specific structure of the stopper may be that the first stopper 301 has a first arc-shaped surface 302 and a rigid first supporting pillar 303, one side of the first arc-shaped surface 302 close to the pocket is used for directly contacting the rolling element 2, and the other side is connected to the first supporting pillar 303. Similarly, the second stopper 304 also has a second arc-shaped surface 305 and a second supporting pillar 306. The beneficial effect who so sets up includes, when satisfying bearing high-speed operation, guarantees to have sufficient rigidity and intensity to deal with the impact force of roller. In particular, the support column may be a cylinder, the diameter of which is 2-3 mm. The specific installation position of the stopper 3 may be a first groove 102 formed on the first side wall 1011, and the support pillar is installed in the first groove 102, and the arc-shaped surface 300 protrudes out of the opening of the first groove 102. The beneficial effect of so setting includes, as shown in fig. 4, its summit of arcwall face 300 is a little higher than the surface of first lateral wall 1011, exceeds the distance and is Sc, so can reduce the clearance between rolling element 2 and the pocket 101 wall of holder 1 to alleviate rolling element 2 and unstable the rocking in pocket 101. The specific structure of the first groove 102 is not limited to the rectangular groove structure shown in fig. 2 to 4, and may also be an arc-shaped groove with an arc-shaped side wall and a planar bottom wall, and the like, and the groove depth may be 1.5-2 mm. With continued reference to FIG. 4, the particular position of the flight 3 in the first recess 102 may be an axial width W of the pocket 101 where the distances d1, d2 between the axes of the first flight 301 and the second flight 304, respectively, and the axial end points of the pocket 101 adjacent thereto are one-fourth_L. Thus, the rolling element 2 can be contacted more stably, and enough rigidity is ensured to deal with the impact of the rolling element on the rolling element.

Referring to fig. 3 and 4, in an embodiment, the arc-shaped surface 300 may have a specific structure that an equivalent curvature radius of the arc-shaped surface 300 is equal to an equivalent curvature radius of the rolling element 2 in line contact with the arc-shaped surface, for example, if the rolling element is a cylinder, and the curvature radius of the region where the rolling element is connected with the arc-shaped surface is a radius of the bottom surface of the cylinder, it is understood that the above-mentioned equality is not absolutely equal, as long as the two are as close as possible. The beneficial effect that so sets up lies in, through the design of equivalent curvature radius for after taking place slight wearing and tearing, can reduce the area of contact of roller 2 with holder 1 as far as possible, increased antifriction bearing's reliability, avoid aeroengine's antifriction bearing to break down for a long time operation.

Referring to fig. 5, in an embodiment, the elastic member 4 may include a first elastic member 401 and second

elastic members

407 and 408, the first elastic member 401 being closer to the radial width W of the second sidewall 1012 than the second

elastic members

407 and 408 are_RFor example, the first resilient member 401 may be disposed at a midpoint of the radial width of the second sidewall 1012. The arrangement has the advantages that the first elastic piece 401 is arranged at a position close to the midpoint, elastic force is applied to reset the rolling body 2 when the rolling body 2 moves in the circumferential direction, the rolling body 2 is prevented from moving in the circumferential direction, and the second

elastic pieces

407 and 408 are arranged at the side parts of the rolling body 2, so that the rolling body 2 can be prevented from slightly deflecting due to the existence of a gap with the pocket 101 during the operation. The specific form of the first elastic member and the second elastic member may be one first elastic member 401 as shown in fig. 3 and fig. 5, and the two second

elastic members

407 and 408 are respectively disposed at equal radial intervals on the radially inner and outer sides of the first elastic member 401, but not limited thereto, for example, the first elastic member may also be a plurality of elastic members. Further, the elastic force directions of the two second

elastic members

407 and 408 disposed at equal radial intervals are respectively an angle a formed by the elastic force direction of the second elastic member 408 disposed radially outside the first elastic member 401 and radially outward from the tangential direction, a is 5 to 10 °, and the elastic force direction of the second elastic member disposed radially inside 407 of the first elastic member 401 is an angle b formed by the elastic force direction of the second elastic member radially inward from the tangential direction, b is 5 to 10 °. Depending on the range of deflection of the rolling bodies 2 found in practice, the spring force direction of the second spring is arranged slightly obliquely to the tangential direction, further reinforcing its effect of preventing deflection of the rolling bodies 2.

Referring to fig. 5, in one embodiment, the specific structure of the elastic member 4The spring 4 may have a force application surface, one side of which is intended to be in direct contact with the rolling bodies, and a spring element, to which the other side is connected. For example, the first elastic member 401, in particular the first force application surface 409, and the first elastic element 402, which may be a spring. The second

elastic members

407 and 408 have second force-applying

surfaces

403 and 405 and second

elastic elements

404 and 406, respectively. The second sidewall 1012 is formed with a second recess, the elastic member is mounted in the recess, and the force application surface protrudes through an opening of the second recess. The second recess may be multiple, for example, the first elastic member is mounted on the recess 103, the second

elastic members

407 and 408 are mounted on the

recesses

104 and 105, the first force-applying surface 409 protrudes from the recess 103 by an amount S_R1The second force application surfaces 403 and 405 protrude from the

grooves

104 and 105, respectively, and the effect of preventing circumferential play and rolling element deflection can be further optimized by the protruding force application surfaces protruding from the second grooves. The specific structure of the force applying surfaces may be as shown in fig. 5, where the first force applying surface 409 is a flat plate surface, the second

force applying surfaces

403 and 405 are inclined surfaces, the elastic force directions of the two second

elastic members

407 and 408 arranged at equal radial intervals are respectively an angle a between the elastic force direction of the second elastic member 408 arranged radially outside the first elastic member 401 and the tangential direction, the angle a is 5 to 10 °, the elastic force direction of the second elastic member arranged radially inside 407 of the first elastic member 401 and the angle b between the elastic force direction of the second elastic member and the tangential direction, and the angle b is 5 to 10 °. Preferably, the second

elastic members

407, 408 may be located such that the radial width W of the pocket 101 whose axes are respectively one-fifth from the radial end points of the pocket 101 adjacent thereto_R. The depth D1 of the groove 103 for mounting the first elastic member 401 is three to four times the depth D2 of the

grooves

104, 105 for mounting the second

elastic members

407, 408, so as to achieve the effects of preventing circumferential play and rolling body deflection, and to make the arrangement of the elastic members more compact, but not limited thereto.

The rolling bearing can be manufactured by forming a first groove and a second groove on the retainer 1, installing the stopper 3 and the elastic element 4, and assembling the retainer 1 with the inner ring, the outer ring and the rolling body after the installation.

As is apparent from the above description, the method of holding the rolling elements of the rolling bearing includes: when the rolling body is contacted with the side wall of the retainer, the rolling body is continuously in ground line contact with the retainer at the front side of the rotation direction of the retainer;

when the rolling body and the retainer move or deflect in the circumferential direction, the rolling body is subjected to elastic force acting on the rear side of the rotation direction of the retainer.

For example, as described in the above embodiment, the stopper 3 having the arc-shaped surface 300 is provided on the first side wall 1011 at the front end of the rotation direction of the cage 1, so that the rolling element 2 is in continuous line contact with the arc-shaped surface 300 at the front side of the rotation direction of the cage 1;

the second side wall 1012 on which the elastic member 4 is provided at the rear end in the rotational direction of the cage 1, and when the rolling elements 2 and the cage 1 move or deflect in the circumferential direction, the elastic member 4 causes the rolling elements 2 to be restored by receiving an elastic force on the rear side in the rotational direction of the cage 1.

In summary, the cage and the rolling bearing adopting the above embodiments have the advantages that the first side wall of the pocket is provided with the stopper which keeps line contact with the rolling element, so that the actual contact area between the rolling element and the wall surface of the cage can be effectively reduced, the friction and the wear between the rolling element and the wall surface of the cage can be reduced, and the bearing performance can be improved; on the other hand, the second lateral wall in pocket hole is equipped with the elastic component, can effectively alleviate the rolling element in the unstable rocking of pocket hole and circumference drunkenness. The device not only can reduce the friction loss between rolling element and the holder, but also can more steady operation of the rolling element in the pocket hole, thereby prolonging the service life of the bearing and leading the gas turbine to operate stably and reliably.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A cage for a rolling bearing, the cage including pockets for accommodating rolling bodies, the cage being characterized in that the pockets have a first sidewall and a second sidewall in a circumferential direction, an accommodating space for accommodating the rolling bodies being provided between the first sidewall and the second sidewall, the first sidewall being located before the second sidewall in a rotational direction of the cage, wherein the cage further includes:

the stopper is arranged on the first side wall and provided with an arc-shaped surface, and the arc-shaped surface is used for keeping line contact with the rolling body;

and an elastic member provided on the second side wall, the elastic member being configured to apply an elastic force to the rolling element to move the rolling element in a rotational direction of the cage, the elastic member including a first elastic member and a second elastic member, the first elastic member being closer to a midpoint of a radial width of the second side wall than the second elastic member.

2. The retainer of claim 1, wherein the retainer has a plurality of second resilient members, the plurality of second resilient members including two second resilient members respectively disposed at equal radial intervals radially inward and outward of the first resilient member.

3. The holder according to claim 2, wherein the elastic force directions of the two second elastic members are respectively 5 to 10 ° in a radially outward direction from the tangential direction of the elastic force direction of the second elastic member disposed radially outward of the first elastic member, and 5 to 10 ° in a radially inward direction from the tangential direction of the elastic force direction of the second elastic member disposed radially inward of the first elastic member.

4. The cage of claim 1, wherein said elastic member has a force application surface for directly contacting the rolling bodies on one side and an elastic member connected to the other side; the second side wall is provided with a second groove, the elastic piece is arranged in the groove, and the force application surface protrudes out of an opening of the second groove.

5. The cage of claim 1, wherein said stops comprise a first stop and a second stop spaced axially of said cage.

6. The cage of claim 5, wherein said stop member has an arcuate surface for direct contact with the rolling elements on one side and a rigid support post attached to the other side; a first groove is formed in the first side wall, the supporting columns are mounted in the grooves, and the arc-shaped face protrudes out of the opening of the first groove.

7. The cage of claim 6 wherein the axes of the first and second stops are each one-quarter of the axial width of the pocket from the axial end point of the pocket adjacent thereto.

8. The cage of claim 1, wherein the arcuate surface has an equivalent radius of curvature equal to an equivalent radius of curvature of a rolling element in line contact therewith.

9. A rolling bearing comprising:

an inner ring is arranged at the inner side of the inner ring,

an outer ring is arranged on the outer ring,

a rolling body; it is characterized by also comprising:

the holder of any one of claims 1-8.

10. A gas turbine engine comprising a shaft and the rolling bearing of claim 9.

11. A method of manufacturing a rolling bearing, comprising manufacturing the rolling bearing according to claim 9.