CN219605850U - Ball bearing for turbocharger - Google Patents
Ball bearing for turbocharger Download PDFInfo
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- CN219605850U CN219605850U CN202320470225.8U CN202320470225U CN219605850U CN 219605850 U CN219605850 U CN 219605850U CN 202320470225 U CN202320470225 U CN 202320470225U CN 219605850 U CN219605850 U CN 219605850U
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- bearing
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- ball
- outer ring
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Abstract
A ball bearing for a turbocharger, the ball bearing comprising an inner bearing ring and an outer bearing ring, the inner bearing ring and the outer bearing ring being sleeved together, a gap being provided between the inner bearing ring and the outer bearing ring and forming a bearing cavity in which bearing balls are disposed; the bearing comprises a bearing outer ring, and is characterized in that at least one circumferentially distributed oil groove is formed in the periphery of the bearing outer ring, an oil through hole communicated to the inner cavity of the bearing is formed in the oil groove, and a first lower oil hole is further formed in the bearing outer ring. In the supercharger, the unique oil path structure is arranged on the ball bearing, after lubricating oil enters the central shell through the oil inlet, the lubricating oil can be fully distributed in the oil groove, and enters between the bearing inner ring and the bearing outer ring through the oil hole for lubrication, and a hydraulic oil film can be formed during operation to absorb vibration from a rotating shaft and improve NVH performance.
Description
Technical Field
The utility model belongs to the technical field of turbochargers, and particularly relates to a ball bearing for a turbocharger.
Background
The turbocharger technology is widely applied to automobiles, and as an important device applied to automobiles, the reliability, the running stability and the like of the turbocharger are required to be focused.
The turbocharger is provided with a shafting assembly, which comprises a rotating shaft and a bearing arranged on the rotating shaft, wherein the bearing can be a sleeve type floating bearing or a ball bearing with a relatively complex structure.
At present, a common turbocharger has the characteristic of slow low-speed response, but the low-speed turbocharger is a common state of a vehicle. The use of ball bearings in the shafting assembly can improve the low speed efficiency of the supercharger, but in the conventional structure, the ball bearings are in rigid contact, the vibration transmitted from the rotor to the bearing outer ring cannot be absorbed, and the NVH performance is poor.
In addition, since the ball bearing itself is characterized by point contact, the mechanical efficiency is high, but too much lubrication oil between the bearing balls will cause a large rotational resistance of moving parts such as the bearing balls, so the design of the oil path in the ball bearing also needs to be improved.
Based on the above circumstances, the present utility model has further devised and improved ball bearings.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the ball bearing for the turbocharger, which is provided with a unique oil path structure, can generate a hydraulic oil film during working, has good lubricating effect and improves the overall operation efficiency of the turbocharger.
The utility model is solved by the following technical scheme.
A ball bearing for a turbocharger, the ball bearing comprising an inner bearing ring and an outer bearing ring, the inner bearing ring and the outer bearing ring being sleeved together, a gap being provided between the inner bearing ring and the outer bearing ring and forming a bearing cavity in which bearing balls are disposed; the bearing comprises a bearing outer ring, and is characterized in that at least one circumferentially distributed oil groove is formed in the periphery of the bearing outer ring, an oil through hole communicated to the inner cavity of the bearing is formed in the oil groove, and a first lower oil hole is further formed in the bearing outer ring.
In the supercharger, the unique oil path structure is arranged on the ball bearing, after lubricating oil enters the central shell through the oil inlet, the lubricating oil can be fully distributed in the oil groove, and enters between the bearing inner ring and the bearing outer ring through the oil hole for lubrication, and a hydraulic oil film can be formed during operation to absorb vibration from a rotating shaft and improve NVH performance. Specifically, since the lubricant oil flows sufficiently, a hydraulic oil film can be formed on both the axial outer surface and the radial outer surface of the ball bearing, and an excessive phenomenon of lubrication oil praise does not occur.
In a preferred embodiment, the two ends of the bearing inner cavity are provided with bearing ball positioning sleeves, and the bearing balls are arranged in holes in the bearing ball positioning sleeves, so that the structure is stable, and the working efficiency is high.
In a preferred embodiment, two annular oil grooves are formed in the periphery of the bearing outer ring, a central groove is formed between the two oil grooves, and the oil grooves and the central groove are formed by concave outer surfaces of the bearing outer ring.
In a preferred embodiment, the bearing outer ring is provided with a notch for cooperating with a limiting structure to prevent the bearing outer ring from rotating.
In a preferred embodiment, the inner wall of the bearing inner ring is provided with a bearing inner ring oil cavity with a concave structure, and the lubricating effect is good due to oil storage and lubrication.
In a preferred embodiment, the bearing inner ring is formed by two symmetrically arranged bearing inner ring halves, and a hydraulic oil film can be formed between the mutually contacted end surfaces of the two bearing inner ring halves during operation, so that axial supporting force can be well provided.
Compared with the prior art, the utility model has the following beneficial effects: the ball bearing for the turbocharger is provided with a unique oil path structure, can generate a hydraulic oil film during working, has a good lubricating effect, and improves the overall operation efficiency of the turbocharger.
Drawings
Fig. 1 is a partial structural sectional view of a ball bearing according to the present utility model assembled in a turbocharger.
Fig. 2 is a perspective view of a ball bearing in the present utility model.
Fig. 3 is a cross-sectional view of a ball bearing in the present utility model.
Fig. 4 is a perspective view of a ball bearing of the present utility model in which the outer race of the bearing is omitted.
Description of the embodiments
The utility model is described in further detail below with reference to the drawings and the detailed description.
In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.
Referring to fig. 1 to 4, in a ball bearing 8 for a turbocharger according to the present utility model, the ball bearing 8 is provided on a rotating shaft 9, and a shaft sleeve 74 is further provided on the rotating shaft 9. The ball bearing 8 is arranged in a central shell, the central shell is provided with an oil inlet 21, the oil inlet 21 is communicated with a transverse oil groove 218, and the transverse oil groove 218 is communicated with an oil groove oil storage cavity 24 through a transverse oil groove oil hole 219, so that the supply and flow uniformity of lubricating oil are ensured.
In particular to a ball bearing 8 in the utility model, as shown in the drawing, the ball bearing 8 comprises a bearing inner ring 84 and a bearing outer ring 81, the bearing inner ring 84 and the bearing outer ring 81 are sleeved together, a gap is formed between the bearing inner ring 84 and the bearing outer ring 81, and a bearing inner cavity is formed, wherein bearing balls 82 are arranged in the bearing inner cavity; the outer periphery of the bearing outer ring 81 is provided with at least one circumferentially distributed oil groove 87, the oil groove 87 is provided with oil holes 871 communicated to the bearing inner cavity, and the bearing outer ring 81 is also provided with a first lower oil hole 881.
Further, the two ends of the bearing inner cavity are provided with bearing ball positioning sleeves 83, and the bearing balls 82 are arranged in holes on the bearing ball positioning sleeves 83, so that the structure is stable and the working efficiency is high. The bearing outer ring 81 is provided with a notch 818 for cooperating with a limit structure to prevent the bearing outer ring 81 from rotating.
In the utility model, two annular oil grooves 87 are arranged on the periphery of the bearing outer ring 81, a central groove 88 is arranged between the two oil grooves 87, and the oil grooves 87 and the central groove 88 are formed by recessing the outer surface of the bearing outer ring 81; the inner wall of the bearing inner ring 84 is provided with a bearing inner ring oil cavity 841 with a concave structure for oil storage, so that a hydraulic oil film can be formed between the inner wall of the bearing inner ring and the surface of the rotating shaft 9, and the bearing inner ring 84 in the utility model is composed of two symmetrically arranged bearing inner ring halves, and a hydraulic oil film can be formed between the mutually contacted end surfaces of the two bearing inner ring halves during operation, so that an axial supporting force can be well provided.
In the utility model, the ball bearing 8 is arranged in an assembling cavity in the central shell, a plurality of convex inner ring bulges 271 are arranged on the inner wall of the assembling cavity to position the outer surface of the bearing outer ring 81, and a hydraulic oil film can be formed at the position; the oil groove storage chamber 24 and the central oil storage chamber 28 are respectively formed between the inner wall of the assembly chamber and the outer wall of the bearing outer ring 81 in the areas corresponding to the oil groove 87 and the central groove 88, and lubricating oil can fill the oil groove storage chamber 24 and the central oil storage chamber 28 and enter the ball bearing; the bearing outer ring 81 is provided with a first lower oil hole 881 at a lower position of the central groove 88, and a second lower oil hole 26 is provided at a corresponding position on the wall of the assembly cavity and is communicated with the oil outlet cavity, so as to be used for discharging oil and form a part of a circulating oil path.
As can be seen from the above description of the structure, in the present utility model, a unique oil path structure is provided on the ball bearing 8, after the lubricating oil enters the central housing 2 through the oil inlet 21, the lubricating oil can be distributed in the oil groove 87, and enters between the bearing inner ring 84 and the bearing outer ring 81 through the oil through hole 871, so as to lubricate, form a hydraulic oil film during operation, absorb vibration from the rotating shaft, and improve NVH performance. Specifically, since the flow of the lubricating oil is sufficient, a hydraulic oil film can be formed on both the axially outer surface and the radially outer surface of the ball bearing 8. The oil storage cavities on two sides are used for storing lubricating oil, so that the ball bearing is always in a state of being saturated with the lubricating oil.
In the above, the ball bearing for the turbocharger is provided with a unique oil path structure, and can generate a hydraulic oil film during working, so that the lubricating effect is good, and the overall operation efficiency of the turbocharger is improved.
The scope of the present utility model includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the utility model.
Claims (6)
1. A ball bearing for a turbocharger, characterized in that the ball bearing (8) comprises a bearing inner ring (84) and a bearing outer ring (81), the bearing inner ring (84) and the bearing outer ring (81) are sleeved together, a gap is formed between the bearing inner ring (84) and the bearing outer ring (81) and a bearing inner cavity is formed, and bearing balls (82) are arranged in the bearing inner cavity;
the bearing outer ring (81) is provided with at least one circumferentially distributed oil groove (87), the oil groove (87) is internally provided with an oil through hole (871) communicated to the inner cavity of the bearing, and the bearing outer ring (81) is also provided with a first lower oil hole (881).
2. A ball bearing for a turbocharger according to claim 1, wherein the bearing cavity is provided with bearing ball locating sleeves (83) at both ends, and the bearing balls (82) are provided in holes in the bearing ball locating sleeves (83).
3. A ball bearing for a turbocharger according to claim 1, wherein two annular oil grooves (87) are provided on the outer periphery of the bearing outer ring (81), a central groove (88) is provided between the two oil grooves (87), and the oil grooves (87) and the central groove (88) are formed by recessing the outer surface of the bearing outer ring (81).
4. A ball bearing for a turbocharger according to claim 1, wherein the bearing outer race (81) is provided with notches (818).
5. A ball bearing for a turbocharger as claimed in claim 1, wherein the inner wall of the bearing inner ring (84) is provided with a bearing inner ring oil chamber (841) of a concave structure.
6. A ball bearing for a turbocharger according to claim 1, characterized in that the bearing inner ring (84) is formed by two symmetrically arranged bearing inner ring halves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320470225.8U CN219605850U (en) | 2023-03-13 | 2023-03-13 | Ball bearing for turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320470225.8U CN219605850U (en) | 2023-03-13 | 2023-03-13 | Ball bearing for turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219605850U true CN219605850U (en) | 2023-08-29 |
Family
ID=87745610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320470225.8U Active CN219605850U (en) | 2023-03-13 | 2023-03-13 | Ball bearing for turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219605850U (en) |
-
2023
- 2023-03-13 CN CN202320470225.8U patent/CN219605850U/en active Active
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