Ceramic ball bearing of supercharger

Abstract

The utility model belongs to the technical field of bearings for superchargers, and relates to a ceramic ball bearing for a supercharger, which comprises a mandrel and a spacer bush, and two axial ends of an inner hole of the spacer bush are respectively and rotatably supported on the mandrel through a group of support components; the supporting assembly comprises a retainer and a ceramic ball limited by the retainer, the radial inner side of the ceramic ball is arranged in the outer roller path of the mandrel, and the radial outer side of the ceramic ball is limited by a spacer bush limiting part on the inner wall of the spacer bush. The product is reasonable and ingenious in structure, adopts the spacer bush to be rotatably supported on the mandrel through the ceramic balls, and has the advantages of being not easy to block during high-speed operation, good in stability, high-temperature-resistant and wear-resistant.

Description

Technical Field

[0001] The utility model belongs to the technical field of supercharger bearings and relates to a supercharger ceramic ball bearing. Background Art

[0002] Chinese Patent No. 2015207557730 discloses a floating bearing spacer for a gasoline engine turbocharger, which can effectively increase the life of the turbocharger and reduce pollution during use. However, some problems were found in use, mainly that it is easy to get stuck and has poor stability when running at high speed. Summary of the invention

[0003] In view of the above problems, the utility model provides a supercharger ceramic ball bearing, which is not easy to get stuck and has good stability when running at high speed.

[0004] According to the technical solution of the utility model: a supercharger ceramic ball bearing, characterized in that: it includes a core shaft and a spacer sleeve, and the axial ends of the inner hole of the spacer sleeve are rotatably supported on the core shaft through a group of support components;

[0005] The support assembly includes a retaining frame and a ceramic ball limited by the retaining frame. The radial inner side of the ceramic ball is placed in the outer raceway of the core shaft, and the radial outer side of the ceramic ball is limited by a spacer limiting portion of the inner wall of the spacer.

[0006] As a further improvement of the utility model, a beveled annular groove is respectively arranged on the inner side of the core shaft corresponding to each group of support components, and the diameter of the axial outer side of the beveled annular groove is larger than the diameter of the axial inner side.

[0007] As a further improvement of the utility model, an oil hole is arranged on the spacer sleeve, and the axial direction of the oil hole is inclined toward one side of the support component.

[0008] As a further improvement of the utility model, a spacer sleeve bevel groove is further provided on the spacer sleeve, and the oil hole is provided inwardly along the bevel of the spacer sleeve bevel groove.

[0009] As a further improvement of the utility model, one axial end of the core shaft extends to the outside of the spacer, and a first annular groove and a second annular groove are provided on the circumferential surface of the core shaft extending to the outside of the spacer.

[0010] As a further improvement of the present invention, the width of the second annular groove is greater than the width of the first annular groove.

[0011] As a further improvement of the utility model, the core shaft is provided with an axially penetrating inner hole.

[0012] As a further improvement of the utility model, a first through hole and a second through hole are arranged on the circumferential surface of the spacer sleeve, and the inner diameter of the first through hole is greater than the inner diameter of the second through hole.

[0013] The technical effect of the utility model is that the product structure of the utility model is reasonable and ingenious, and the spacer is rotatably supported on the core shaft through the ceramic ball, and has the advantages of high-speed operation, not easy to get stuck, good stability, high temperature resistance and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It includes a core shaft 10, an outer raceway 11, a bevel ring groove 12, a first ring groove 13, a second ring groove 14, a support assembly 20, a retaining frame 21, a ceramic ball 22, a spacer 30, a spacer limiter 31, an oil hole 32, a first through hole 33, a second through hole 34, etc.

[0017] like Figure 1 As shown, the utility model is a supercharger ceramic ball bearing, comprising a core shaft 10 and a spacer sleeve 30, wherein the axial ends of the inner hole of the spacer sleeve 30 are rotatably supported on the core shaft 10 through a group of support components 20 respectively.

[0018] The support assembly 20 includes a retainer 21 and a ceramic ball 22 limited by the retainer 21. The radial inner side of the ceramic ball 22 is placed in the outer raceway 11 of the core shaft 10, and the radial outer side of the ceramic ball 22 is limited by the spacer limiting portion 31 on the inner wall of the spacer 30. Figure 1 As shown, the spacer sleeve limiter 31 is respectively arranged at the axial ends of the inner wall of the spacer sleeve 30, and the spacer sleeve limiter 31 is an arc shape with an axial outer opening to achieve reliable rotation of the ceramic ball 22 and ensure that it is not easy to get stuck during high-speed operation.

[0019] A bevel annular groove 12 is provided on the mandrel 10 corresponding to the inner side of each group of supporting components 20, and the diameter of the axial outer side of the bevel annular groove 12 is larger than the diameter of the axial inner side. When in use, a retaining spring is provided at the bevel annular groove 12.

[0020] It is understandable that, in order to achieve oil lubrication of the ceramic balls 22 , an oil hole 32 is provided on the spacer sleeve 30 , and the axial direction of the oil hole 32 is inclined toward one side of the support assembly 20 .

[0021] The spacer sleeve 30 is also provided with a spacer sleeve inclined surface groove 35 , and the oil hole 32 is provided inwardly along the inclined surface of the spacer sleeve inclined surface groove 35 .

[0022] One axial end of the mandrel 10 extends to the outside of the spacer 30, and a first annular groove 13 and a second annular groove 14 are provided on the circumferential surface of the mandrel 10 extending to the outside of the spacer 30. The inner hole of the other axial end of the mandrel 10 away from the first annular groove 13 is provided with a countersink step.

[0023] In specific production practice, the width of the second annular groove 14 is greater than the width of the first annular groove 13 .

[0024] The core shaft 10 is provided with an inner hole which penetrates axially.

[0025] A first through hole 33 and a second through hole 34 are provided on the circumferential surface of the spacer 30 . The inner diameter of the first through hole 33 is greater than the inner diameter of the second through hole 34 .

[0026] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A supercharger ceramic ball bearing, characterized in that: It comprises a core shaft (10) and a spacer sleeve (30), wherein the axial ends of the inner hole of the spacer sleeve (30) are rotatably supported on the core shaft (10) via a set of support components (20); The support assembly (20) comprises a retaining frame (21) and a ceramic ball (22) limited by the retaining frame (21), the radial inner side of the ceramic ball (22) is placed in the outer raceway (11) of the core shaft (10), and the radial outer side of the ceramic ball (22) is limited by a spacer limiting portion (31) on the inner wall of the spacer (30); The core shaft (10) is provided with an axially penetrating inner hole.

2. The supercharger ceramic ball bearing according to claim 1, characterized in that: A bevel annular groove (12) is provided on the core shaft (10) on the inner side corresponding to each group of support components (20), and the diameter of the axial outer side of the bevel annular groove (12) is greater than the diameter of the axial inner side.

3. The supercharger ceramic ball bearing according to claim 1, characterized in that: The spacer sleeve (30) is provided with an oil hole (32), and the axial direction of the oil hole (32) is inclined toward one side of the support assembly (20).

4. The supercharger ceramic ball bearing according to claim 3, characterized in that: The spacer sleeve (30) is also provided with a spacer sleeve inclined surface groove (35), and the oil hole (32) is arranged inwardly along the inclined surface of the spacer sleeve inclined surface groove (35).

5. The supercharger ceramic ball bearing according to claim 1, characterized in that: One axial end of the core shaft (10) extends to the outside of the spacer sleeve (30), and a first annular groove (13) and a second annular groove (14) are provided on the circumferential surface of the core shaft (10) extending to the outside of the spacer sleeve (30).

6. The supercharger ceramic ball bearing according to claim 5, characterized in that: The width of the second annular groove (14) is greater than the width of the first annular groove (13).

7. The supercharger ceramic ball bearing according to claim 1, characterized in that: A first through hole (33) and a second through hole (34) are provided on the circumferential surface of the spacer sleeve (30); the inner diameter of the first through hole (33) is greater than the inner diameter of the second through hole (34).

Images