Roller bearing with oil guide hole structure on outer ring
By opening oil guide holes at the bottom of the outer ring oil groove and through material, precision and structural design, the problem of foreign matter accumulation under oil mist lubrication is solved, improving the reliability and load-bearing capacity of the bearing and adapting to complex working conditions.
Patent Information
- Application Number
- CN202511833624.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-08
- Publication Date
- 2026-03-03
AI Technical Summary
In existing cylindrical roller bearings with oil mist lubrication and inner ring rotation structure, foreign matter in the oil accumulates in the outer ring oil groove and cannot be discharged, resulting in low bearing reliability.
Oil guide holes are radially opened at the bottom of the outer ring oil groove to discharge foreign objects. It is combined with the design of 8Cr4Mo4V material smelted in double vacuum, Grade I roller with P4 precision and solid cage, and the combination structure of double flange on the outer ring and single flange on the inner ring.
It effectively solves the problem of foreign matter accumulation, improves the reliability of bearings, ensures stable performance in a wide temperature range, can withstand high radial and axial loads, and adapts to complex flight loads.
Smart Images
Figure CN121594086A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a roller bearing with an outer ring featuring an oil guide hole structure, belonging to the field of aero-engine transmission technology. Background Technology
[0002] Currently, cylindrical roller bearings, deep groove ball bearings, angular contact ball bearings, and tapered roller bearings are commonly used for accessory drive bearings. However, a certain accessory drive component in an aero-engine operates under special conditions, requiring high bearing speeds and radial loads of 3000–4000 N simultaneously.
[0003] The load-carrying capacity of deep groove ball bearings is insufficient. After changing to cylindrical roller bearings, the load-carrying capacity of the bearings is improved. However, due to the gear shaft structure, the roller bearings use double flanges on the outer ring. Furthermore, due to oil mist lubrication and inner ring rotation, foreign matter in the oil accumulates in the outer ring oil groove and cannot be discharged, affecting the reliability of the bearings.
[0004] In summary, existing cylindrical roller bearings employ oil mist lubrication and an inner ring rotation structure, which leads to the accumulation of foreign matter in the oil in the outer ring oil groove, resulting in low bearing reliability. Summary of the Invention
[0005] This invention addresses the technical problem of existing cylindrical roller bearings using oil mist lubrication and an inner ring rotation structure, which leads to the accumulation of foreign matter in the oil in the outer ring oil groove and the inability to be discharged, resulting in low bearing reliability. Therefore, this invention proposes a roller bearing with an outer ring oil guide hole structure, which includes an outer ring, an inner ring, rolling elements disposed between the inner and outer rings, and a cage.
[0006] When the roller bearing with an outer ring having an oil guide hole is in operation, its outer ring is stationary while its inner ring rotates and is lubricated by oil mist.
[0007] The outer ring has a double-edge structure. Both ends of the inner raceway of the outer ring are provided with annular oil grooves. At least one oil guide hole is provided radially at the bottom of each annular oil groove. The oil guide hole penetrates the outer ring and is used to discharge foreign objects accumulated in the annular oil grooves to the outside.
[0008] As another modification of the present invention, the number of oil guide holes is multiple, and they are evenly distributed along the outer circumference.
[0009] As another modification of the present invention, three oil guide holes are opened radially at the bottom of each annular oil groove.
[0010] As another modification of the present invention, the inner ring is provided with a single retaining edge.
[0011] As another modification of the present invention, the cage adopts an outer ring guiding method.
[0012] As another modification of the present invention, the outer ring, inner ring and rolling elements are all made of 8Cr4Mo4V steel smelted under double vacuum.
[0013] As another modification of the present invention, the overall precision of the bearing is grade C.
[0014] As another modification of the present invention, the rolling element is a cylindrical roller with Class I precision.
[0015] As another modification of the present invention, the cage is a solid cage.
[0016] As another modification of the present invention, the inner diameter of the outer ring with oil guide hole structure is 30mm, the outer diameter is 62mm, and the width is 16mm.
[0017] The beneficial effects of this invention are:
[0018] By adding oil guide holes to the outer ring oil groove, the problem of foreign matter accumulating in the outer ring oil groove and being unable to be discharged under oil mist lubrication and inner ring rotation conditions is effectively solved, avoiding premature bearing failure caused by this and improving bearing reliability.
[0019] The bearing rings and rolling elements are made of 8Cr4Mo4V material smelted in a double vacuum process, ensuring stable performance over a wide temperature range of -40 to +250°C. By employing P4-grade precision, the largest number of Class I rollers, and a solid cage, the bearing can withstand radial heavy loads of 3000 to 4000 N and coupled axial loads.
[0020] The design, which combines an outer ring with double flanges, external cage guidance, and an inner ring with a single flange, improves the oil mist lubrication effect, can withstand a certain axial force, and allows necessary axial displacement, thus adapting to complex flight load conditions. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of a roller bearing with an outer ring having an oil guide hole, according to the present invention.
[0022] Figure 2 This is a schematic diagram of a roller bearing with an outer ring featuring an oil guide hole being installed on a main machine. Detailed Implementation
[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a roller bearing with an outer ring having an oil guide hole structure, characterized in that it includes an outer ring 1, an inner ring 2, rolling elements 3 disposed between the inner and outer rings 1, and a cage 4;
[0025] When the roller bearing with an outer ring having an oil guide hole is in operation, its outer ring 1 is stationary and its inner ring 2 rotates and is lubricated by oil mist.
[0026] The outer ring 1 has a double-edge structure. Both ends of the inner raceway of the outer ring 1 are provided with annular oil grooves. At least one oil guide hole 5 is provided radially at the bottom of each annular oil groove. The oil guide hole 5 penetrates the outer ring 1 and is used to discharge foreign objects accumulated in the annular oil grooves to the outside.
[0027] By adding oil guide holes to the outer ring oil groove, the problem of foreign matter accumulating in the outer ring oil groove and being unable to be discharged under oil mist lubrication and inner ring rotation conditions is effectively solved, avoiding premature bearing failure caused by this and improving bearing reliability.
[0028] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that it has multiple oil guide holes 5, evenly distributed along the circumference of the outer ring 1. By adding oil guide holes to the outer ring oil groove, the problem of foreign matter accumulating in the outer ring oil groove and failing to be discharged under oil mist lubrication and inner ring rotation conditions is effectively solved, avoiding premature bearing failure caused by this and improving bearing reliability. Other components and connection methods are the same as in specific embodiment one.
[0029] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that each annular oil groove has three radially spaced oil guide holes 5 at its bottom. Preferably, three oil guide holes are used, as testing has shown this to be more effective. The number of oil guide holes can be adjusted according to the bearing size and operating environment. Other components and connection methods are the same as in specific embodiment one or two.
[0030] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that the inner ring 2 is provided with a single retaining edge. It can withstand a certain axial force and allow necessary axial displacement, adapting to complex flight load conditions. Other components and connection methods are the same as any one of specific embodiments one to three.
[0031] Specific Implementation Method Five: Combining Figure 1 and Figure 2This embodiment differs from specific embodiment one in that the cage 4 uses an outer ring 1 as a guide. This design facilitates lubrication of the inner ring. Other components and connection methods are the same as in any one of specific embodiments one through four.
[0032] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that the outer ring 1, inner ring 2, and rolling element 3 are all made of 8Cr4Mo4V steel produced by double-vacuum smelting. Double-vacuum smelting 8Cr4Mo4V steel is a high-end special bearing steel developed to address the extreme operating conditions of aero-engine bearings. Its chemical composition, 8Cr4Mo4V, determines its high strength, high wear resistance, and high temperature resistance. The double-vacuum smelting process is its forging process, which, combined with its high strength, high wear resistance, and high temperature resistance, improves bearing reliability. This ensures stable bearing performance within a wide temperature range of -40°C to +250°C; other components and connection methods are the same as any one of specific embodiments one through five.
[0033] Specific implementation method seven: Combination Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that the overall precision of the bearing is grade C. By employing grade C and P4 precision, the maximum number of grade I rollers, and a solid cage, the bearing can withstand radial heavy loads of 3000–4000 N and coupled variable axial loads. Other components and connection methods are the same as in any one of specific embodiments one through six.
[0034] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that the rolling element 3 uses Class I precision cylindrical rollers. National standard GB / T 4661—2002 "Rolling Bearings - Cylindrical Rollers" classifies the product quality of cylindrical rollers into four tolerance grades, with precision requirements ranging from high to low: Grade 0, Grade I, Grade II, and Grade III. This embodiment can be assembled using pre-produced Class I cylindrical rollers. Other components and connection methods are the same as any one of specific embodiments one through seven.
[0035] Specific Implementation Method Nine: Combining Figure 1 and Figure 2 This embodiment differs from specific embodiment one in that the cage 4 is a solid cage 4. This design is used to improve bearing strength. Other components and connection methods are the same as any one of specific embodiments one through eight.
[0036] Specific Implementation Method Ten: Combining Figure 1 and Figure 2This embodiment differs from specific embodiment one in that the inner diameter of the outer ring 1 with the oil guide hole 5 in this embodiment is 30mm, the outer diameter is 62mm, and the width is 16mm. This design meets the bearing interface dimensions, and the other components and connection methods are the same as any one of specific embodiments one to nine.
[0037] Combination Figure 1 and Figure 2 Explanation of the working principle of this invention:
[0038] By adding oil guide holes to the outer ring oil groove, the problem of foreign matter accumulating in the outer ring oil groove and failing to be discharged under oil mist lubrication and inner ring rotation conditions is effectively solved, avoiding premature bearing failure caused by this and improving bearing reliability. The bearing rings and rolling elements are manufactured using 8Cr4Mo4V material smelted in a double vacuum process, ensuring stable bearing performance over a wide temperature range of -40℃ to +250℃. The use of P4-grade precision, the largest number of Class I rollers, and a solid cage design enables the bearing to withstand radial heavy loads of 3000–4000N and coupled variable axial loads. The design of double flanges on the outer ring, external cage guidance, and a single flange on the inner ring improves oil mist lubrication while also withstanding a certain axial force and allowing necessary axial displacement, adapting to complex flight load conditions.
[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A roller bearing with an outer ring having an oil guide hole structure, characterized in that... It includes an outer ring (1), an inner ring (2), a rolling element (3) disposed between the inner and outer rings (1), and a cage (4); When the roller bearing with an outer ring having an oil guide hole is in operation, its outer ring (1) is stationary and its inner ring (2) rotates and is lubricated by oil mist. The outer ring (1) has a double-edge structure. Both ends of the inner raceway of the outer ring (1) are provided with annular oil grooves. At least one oil guide hole (5) is provided radially at the bottom of each annular oil groove. The oil guide hole (5) penetrates the outer ring (1) and is used to discharge foreign objects accumulated in the annular oil groove to the outside.
2. The roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The number of oil guide holes (5) is multiple, and they are evenly distributed along the outer ring (1) circumferentially.
3. A roller bearing with an outer ring and an oil guide hole structure according to claim 2, characterized in that, Three oil guide holes are opened radially at the bottom of each annular oil groove (5).
4. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The inner ring (2) is provided with a single retaining edge.
5. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The cage (4) is guided by the outer ring (1).
6. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The outer ring (1), inner ring (2) and rolling element (3) are all made of 8Cr4Mo4V steel smelted under double vacuum.
7. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The overall precision of the bearing is grade C.
8. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The rolling element (3) is a cylindrical roller with Class I precision.
9. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The cage (4) is a solid cage (4).
10. A roller bearing with an outer ring and an oil guide hole structure according to claim 1, characterized in that, The inner diameter of the outer ring (1) with oil guide hole (5) structure is 30mm, the outer diameter is 62mm, and the width is 16mm.