CN213808469U - Double-inner-ring three-point contact ball bearing - Google Patents
Double-inner-ring three-point contact ball bearing Download PDFInfo
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- CN213808469U CN213808469U CN202022544217.2U CN202022544217U CN213808469U CN 213808469 U CN213808469 U CN 213808469U CN 202022544217 U CN202022544217 U CN 202022544217U CN 213808469 U CN213808469 U CN 213808469U
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Abstract
The utility model relates to a two inner circle three point contact ball bearings, include: the steel ball bearing comprises an outer ring, a first inner ring, a second inner ring, a steel ball and a retainer; the outer ring, the first inner ring and the second inner ring are provided with grooves which are correspondingly matched to form a raceway, the steel ball is arranged in the retainer and assembled in the raceway, and the steel ball is in three-point contact fit with the raceway; a joint of the two inner rings is formed between one end surface of the first inner ring and one end surface of the second inner ring; oil filling holes are uniformly formed in the end face, close to the joint, of the first inner ring, a lubricating oil groove is formed in the inner diameter of the second inner ring, and the position, formed in the second inner ring, of the lubricating oil groove corresponds to the position of the oil filling holes of the first inner ring. The utility model improves the bearing lubrication condition, improves the bearing heat dispersion and prolongs the service life through the structural design mode of the double inner rings; the retainer is designed into a boss structure, so that the high-speed performance of the bearing is improved, and the bearing is designed to be guided internally; the structural design of the withdrawal groove solves the problem that the bearing is inconvenient to disassemble after being installed on the shaft.
Description
Technical Field
The utility model relates to a three point contact ball bearing, specificly relate to a two inner circle three point contact ball bearing, belong to bearing technical field.
Background
The three-point contact ball bearing is applied to a certain gas turbine and used for supporting the rotation of a main shaft of the gas turbine. The bearing mainly bears larger radial load and certain axial load during working, the bearing has high working temperature and high rotating speed, is convenient to maintain, and is urgently required to design a special-structure three-point contact ball bearing which has good stress performance, excellent heat dissipation performance, long service life and high reliability in order to meet the use requirement of required working conditions.
Disclosure of Invention
To the requirement of this operating mode to the bearing, the utility model provides a be arranged in certain gas turbine to be used for supporting rotatory two inner circle three point contact ball bearings of main shaft, this bearing can satisfy user's installation and use operating mode demand conscientiously, and easy dismounting improves bearing heat dispersion and life.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a dual inner race three point contact ball bearing comprising: the steel ball bearing comprises an outer ring, a first inner ring, a second inner ring, a steel ball and a retainer; the outer ring, the first inner ring and the second inner ring are provided with grooves which are correspondingly matched to form a raceway, the steel ball is arranged in the retainer and assembled in the raceway, and the steel ball is in three-point contact fit with the raceway; a joint of the two inner rings is formed between one end surface of the first inner ring and one end surface of the second inner ring; oil filling holes are uniformly formed in the end face, close to the joint, of the first inner ring, a lubricating oil groove is formed in the inner diameter of the second inner ring, and the position, formed in the second inner ring, of the lubricating oil groove corresponds to the position of the oil filling holes of the first inner ring.
Furthermore, a lubricating oil groove formed in the second inner ring leads to an oil filling hole in the end face of the first inner ring, and a communicated oil way is formed between the lubricating oil groove and the oil filling hole;
one end of the lubricating oil groove is close to the oil filling hole, oil mist is sprayed from the other end of the lubricating oil groove to perform forced lubrication on the bearing, and lubricating oil can directly enter the middle part of the bearing raceway.
The oil injection holes on the end surface of the first inner ring are radial holes, the number of the oil injection holes is a plurality, and the oil injection holes are uniformly distributed on the end surface of the first inner ring at equal intervals;
the lubricating oil grooves formed in the second inner ring are axial grooves, the number of the lubricating oil grooves corresponds to the number of the oil injection holes, and the lubricating oil grooves are uniformly arranged in the inner diameter of the second inner ring at equal intervals;
further, the inner diameter chamfer angle of the joint of the two inner rings is designed to be 30 degrees; what this design is different from the fillet is that bearing internal diameter and axle cooperation installation back can increase the space of lubricated oil circuit, and the lubricating oil of being convenient for gets into inside the bearing.
The utility model discloses a structural design mode of above-mentioned two inner circles improves the bearing lubrication condition, improves bearing heat dispersion and life.
The internal diameter lead angle of the first inner ring is 30 degrees; the internal diameter lead angle of the second inner ring is 30 degrees.
In order to improve the high-speed performance of the bearing, the bearing is designed to be internally guided, and the weight of the retainer is reduced as much as possible; the inner diameter and the outer diameter of the retainer are respectively and uniformly provided with a boss structure, a boss extending to the inner diameter direction of the retainer is an inner diameter boss, a boss extending to the outer diameter direction of the retainer is an outer diameter boss, a retainer part between the inner diameter boss and the outer diameter boss is a retainer beam, and every two adjacent retainer beams and the respective inner diameter boss and outer diameter boss thereof form a retainer pocket;
furthermore, the diameter of the pocket of the inner-diameter boss and the diameter of the pocket of the outer-diameter boss of every two adjacent retainer beams are slightly smaller than the diameter of the steel ball; during assembly of the design, the steel ball is pressed in from the outer diameter direction of the retainer, so that the steel ball rotates flexibly and cannot fall out from the inner diameter direction and the outer diameter direction, and the steel ball and the retainer form an assembly component in an assembly process and then are matched with the bearing ring, so that the assembly and disassembly are convenient.
Furthermore, the inner diameter boss and the outer diameter boss of the retainer are respectively designed into a round-cornered structure, so that the steel ball is prevented from being rubbed with the boss structure to generate bruise during installation.
The utility model discloses a two inner circle three point contact ball bearing, in order to solve the very inconvenient problem of dismantlement after the bearing is installed on the axle, the axial width of second inner circle be greater than the axial width of first inner circle, regard the extension line that the centre of sphere of steel ball is perpendicular to the outer lane as the central boundary line, the terminal surface of the outer lane part with the second inner circle homonymy is greater than the terminal surface of the outer lane part with the first inner circle homonymy and the distance of central boundary line; withdrawal grooves are correspondingly arranged between the outer diameter close to the direction of the outer end face of the second inner ring and the inner diameter of the outer ring part at the same side as the first inner ring;
the withdrawing groove is internally provided with a withdrawing tool, the withdrawing tool can be used for being placed into the withdrawing groove during the disassembly, and then the inner ring and the outer ring are pulled out.
The utility model has the advantages that: (1) by means of the structural design mode of the double inner rings, the lubricating condition of the bearing is improved, the heat dissipation performance of the bearing is improved, and the service life of the bearing is prolonged; (2) the retainer is designed into a boss structure, so that the high-speed performance of the bearing is improved, the bearing is designed into an inner guide, and the weight of the retainer is reduced as much as possible; (3) the structural design of the withdrawal groove solves the problem that the bearing is inconvenient to disassemble after being installed on the shaft.
Drawings
Fig. 1 is an overall structure diagram of the present invention.
Fig. 2 is a first inner ring structure diagram of the present invention.
Fig. 3 is a second inner ring structure diagram of the present invention.
Fig. 4 is a structural view of the radial oil filler hole of the first inner ring in cooperation with the axial oil groove of the second inner ring.
Fig. 5 is a structural view of the outer ring withdrawal groove of the present invention.
Fig. 6 is a view showing a structure of the retainer of the present invention.
Fig. 7 is a view from direction a-a of fig. 6.
Fig. 8 is a partially enlarged view of fig. 6.
In the figure, 1, an outer ring, 2, a first inner ring, 3, a second inner ring, 4, a steel ball, 5, a retainer, 6, an oil injection hole, 7, a lubricating oil groove, 2.1 an inner diameter lead angle of the first inner ring, 3.1, an inner diameter lead angle of the second inner ring, 5.1, an inner diameter boss, 5.2, an outer diameter boss, 8, an extension line from a ball center of the steel ball to the outer ring, 9, a second inner ring withdrawal groove, 10 and an outer ring withdrawal groove.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 8, a double inner race three-point contact ball bearing includes: the steel ball bearing comprises an outer ring 1, a first inner ring 2, a second inner ring 3, a steel ball 4 and a retainer 5; the outer ring 1, the first inner ring 2 and the second inner ring 3 are provided with channels which are correspondingly matched to form a raceway, the steel ball 4 is arranged in the retainer 5 and assembled in the raceway, and the steel ball 4 is in three-point contact fit with the raceway; a joint of the two inner rings is formed between one end face of the first inner ring 2 and one end face of the second inner ring 3; oil filling holes 6 are uniformly formed in the end face, close to the joint, of the first inner ring 2, a lubricating oil groove 7 is formed in the inner diameter of the second inner ring 3, and the position, formed in the second inner ring 3, of the lubricating oil groove 7 corresponds to the position of the oil filling hole 6 of the first inner ring 2.
Further, a lubricating oil groove 7 formed in the second inner ring 3 leads to an oil filling hole 6 in the end face of the first inner ring 2, and a communicated oil way is formed between the lubricating oil groove 7 and the oil filling hole 6;
the oil injection holes 6 in the end surface of the first inner ring 2 are radial holes, the number of the oil injection holes 6 is a plurality, and the oil injection holes 6 are uniformly distributed on the end surface of the first inner ring 2 at equal intervals;
preferably, the number of the oil injection holes 6 is 12;
the lubricating oil grooves 7 formed in the second inner ring 3 are axial grooves, the number of the lubricating oil grooves 7 corresponds to the number of the oil filling holes 6, and the lubricating oil grooves 7 are uniformly arranged in the inner diameter of the second inner ring 3 at equal intervals;
preferably, the number of the lubricating oil grooves 7 arranged in the inner diameter of the second inner ring 3 is 12;
further, the inner diameter chamfer angle of the joint of the two inner rings is designed to be 30 degrees; what this design is different from the fillet is that bearing internal diameter and axle cooperation installation back can increase the space of lubricated oil circuit, and the lubricating oil of being convenient for gets into inside the bearing.
The internal diameter lead angle of the first inner ring 2 is 30 degrees; the lead angle of the inner diameter of the second inner ring 3 is 30 °.
In order to improve the high-speed performance of the bearing, the bearing is designed to be guided internally, and the weight of the retainer is reduced as much as possible; the inner diameter and the outer diameter of the retainer 5 are respectively and uniformly provided with a boss structure, a boss extending to the inner diameter direction of the retainer is an inner diameter boss 5.1, a boss extending to the outer diameter direction of the retainer is an outer diameter boss 5.2, a retainer part between the inner diameter boss 5.1 and the outer diameter boss 5.2 is a retainer beam, and each two adjacent retainer beams and the respective inner diameter boss 2.1 and outer diameter boss 5.2 form a retainer pocket;
furthermore, the diameter of a pocket of an inner diameter boss 5.1 and the diameter of a pocket of an outer diameter boss 5.2 of every two adjacent retainer beams are slightly smaller than the diameter of the steel ball 4; during assembly of the design, the steel ball 4 is pressed in from the outer diameter direction of the retainer 5, so that the steel ball 4 rotates flexibly and cannot fall out from the inner diameter direction and the outer diameter direction, and the steel ball 4 and the retainer 5 form an assembly component in an assembly process and then are matched with the bearing ring, so that the assembly and disassembly are convenient.
In order to solve the problem that the bearing is very inconvenient to disassemble after being installed on a shaft, the axial width of the second inner ring 3 is larger than that of the first inner ring 2, the central boundary line is the extension line 8 from the center of the steel ball 4 to the outer ring 1, and the distance h1 from the end surface of the outer ring part on the same side as the second inner ring 3 to the central boundary line is larger than the distance h2 from the end surface of the outer ring part on the same side as the first inner ring 2 to the central boundary line; a second inner ring withdrawal groove 9 and an outer ring withdrawal groove 10 are correspondingly arranged between the outer diameter close to the outer end face direction of the second inner ring 3 and the inner diameter of the outer ring part at the same side as the first inner ring 2;
the withdrawing groove is internally provided with a withdrawing tool, the withdrawing tool can be used for being placed into the withdrawing groove during the disassembly, and then the inner ring and the outer ring are pulled out.
Based on the above embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Claims (6)
1. A dual inner race three point contact ball bearing comprising: outer lane, first inner circle, second inner circle, steel ball and holder, its characterized in that: the outer ring, the first inner ring and the second inner ring are provided with grooves which are correspondingly matched to form a raceway, the steel ball is arranged in the retainer and assembled in the raceway, and the steel ball is in three-point contact fit with the raceway; a joint of the two inner rings is formed between one end surface of the first inner ring and one end surface of the second inner ring; oil filling holes are uniformly formed in the end face, close to the joint, of the first inner ring, a lubricating oil groove is formed in the inner diameter of the second inner ring, and the position, formed in the second inner ring, of the lubricating oil groove corresponds to the position of the oil filling holes of the first inner ring.
2. A double inner race three point contact ball bearing according to claim 1, wherein: and a lubricating oil groove formed in the second inner ring leads to the oil filling hole in the end face of the first inner ring, and a communicated oil way is formed between the lubricating oil groove and the oil filling hole.
3. A double inner race three point contact ball bearing according to claim 1, wherein: the oil filler point on the first inner circle terminal surface be radial hole, oil filler point quantity be a plurality of, a plurality of oil filler point equidistance evenly distributed on first inner circle terminal surface.
4. A double inner race three point contact ball bearing according to claim 1, wherein: the lubricating oil grooves formed in the second inner ring are axial grooves, the number of the lubricating oil grooves corresponds to the number of the oil holes, and the lubricating oil grooves are uniformly arranged in the inner diameter of the second inner ring at equal intervals.
5. A double inner race three point contact ball bearing according to claim 1, wherein: the inner diameter chamfer of the joint of the two inner rings is designed to be 30 degrees.
6. A double inner race three point contact ball bearing according to claim 1, wherein: the axial width of the second inner ring is greater than that of the first inner ring, an extension line from the center of the steel ball to the outer ring is taken as a central boundary line, and the distance from the end face of the outer ring part at the same side as the second inner ring to the central boundary line is greater than the distance from the end face of the outer ring part at the same side as the first inner ring to the central boundary line; and withdrawal grooves are respectively and correspondingly arranged between the outer diameter close to the direction of the outer end face of the second inner ring and the inner diameter of the outer ring part at the same side as the first inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022544217.2U CN213808469U (en) | 2020-11-06 | 2020-11-06 | Double-inner-ring three-point contact ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022544217.2U CN213808469U (en) | 2020-11-06 | 2020-11-06 | Double-inner-ring three-point contact ball bearing |
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| Publication Number | Publication Date |
|---|---|
| CN213808469U true CN213808469U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022544217.2U Active CN213808469U (en) | 2020-11-06 | 2020-11-06 | Double-inner-ring three-point contact ball bearing |
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| CN (1) | CN213808469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253618A (en) * | 2020-11-06 | 2021-01-22 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Double-inner-ring three-point contact ball bearing |
-
2020
- 2020-11-06 CN CN202022544217.2U patent/CN213808469U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253618A (en) * | 2020-11-06 | 2021-01-22 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Double-inner-ring three-point contact ball bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221209 Address after: 116300 No.1, Section 1, North Gongji street, Zhuhua street, Wafangdian City, Dalian City, Liaoning Province Patentee after: WAFANGDIAN BEARING GROUP SPECIAL BEARING CO.,LTD. Address before: 116300 Wafangdian Bearing Industrial Park, Dalian City, Liaoning Province Patentee before: WAFANGDIAN BEARING GROUP NATIONAL BEARING ENGINEERING TECHNOLOGY RESEARCH CENTER Co.,Ltd. |
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| TR01 | Transfer of patent right |