Bearing transmission mechanism with emergency lubrication function and aero-engine

Abstract

The invention discloses a bearing transmission mechanism with an emergency lubrication function and an aero-engine, in the bearing transmission mechanism with the emergency lubrication function, an oil way is formed in a bearing seat, an oil hole is formed below the oil way, and the oil way and the oil hole are used for allowing lubricating oil of the engine to pass through; the bearing comprises an outer ring and a retainer, a rolling body is embedded in the retainer, the outer ring comprises an oil receiving groove and an oil storage groove, the oil receiving groove is formed over the outer ring, communicated with the oil hole and used for receiving lubricating oil from the bearing seat, and the oil storage groove is communicated with the oil receiving groove and used for storing the lubricating oil. An oil outlet hole is formed in the bottom of the oil storage groove and used for enabling lubricating oil to flow into the bearing. The oil collecting groove, the oil storage groove, the oil outlet and other structures are integrated on the bearing outer ring, certain lubricating oil can be stored through the structure of the bearing under the condition that an emergency lubricating system is not additionally arranged, and the lubricating oil can directly flow into the bearing so as to cope with the lubricating oil interruption working condition of an aero-engine.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengines, and in particular to a bearing transmission mechanism and an aeroengine with an emergency lubrication function. Background Art

[0002] For aircraft engine main shaft bearings, oil interruption is one of the most severe working conditions, and the operating risk of main shaft bearings in this condition is huge. At present, for some main shaft bearings with relatively severe working conditions such as load, speed, and ambient temperature, emergency lubrication systems are often added to the engine to cope with oil interruption conditions. However, this brings more complex oil systems, engine structure layouts, and more expensive costs.

[0003] Aircraft engines usually have a complete set of lubricating oil systems for lubricating and cooling bearings, gears and other friction pairs. However, during the flight of the aircraft, the engine may be too large in flight attitude or overloaded, causing the oil pump to be unable to extract lubricating oil from the bottom of the oil tank, causing the bearings, gears and other friction pairs to operate under the condition of oil interruption. At this time, bearings, gears and other components are facing oil shortage or even oil-free conditions, which poses a huge risk during operation. In particular, for some main shaft bearings with heavy loads, high speeds, and high ambient temperatures, severe wear and even locking often occur during oil interruption conditions, which greatly affects the progress of engine development. If this occurs in actual flight, it may cause the engine to stop in the air.

[0004] In existing high-performance engines, the main shaft bearings are usually small in size, high in speed, heavy in load, and high in ambient temperature. They generate a lot of friction and heat during operation, and require sufficient lubricating oil to lubricate and cool them. When the lubricating oil is interrupted, these bearings face severe tests because there is no lubricating oil to lubricate and cool them. In some current engines, the main shaft bearings with more severe working conditions are usually equipped with additional emergency lubricating oil circuits in addition to conventional lubricating oil circuits, which are used to provide a certain amount of lubricating oil to the bearings when the lubricating oil is interrupted, so as to prevent them from being unable to withstand the oil outage condition.

[0005] The existing technology requires an additional emergency lubrication system, including an additional emergency oil source, emergency oil circuit, emergency nozzle, etc., which makes the entire engine structure and layout more complicated and the cost more expensive. In addition, the emergency lubrication system usually uses air bleed to inject emergency lubricating oil. The external emergency nozzle usually sprays oil-air mixture to the bearing, which is easily affected by the wind resistance caused by the high-speed rotation of the bearing, making it difficult to effectively enter the bearing. In addition, the layout of the air circuit also makes the engine structure more complicated, and the temperature and impact of the airflow will also have an adverse effect on the operation of the bearing. Summary of the invention

[0006] The present invention provides a bearing transmission mechanism with an emergency lubrication function to solve the technical problem that the prior art uses an additional emergency lubrication system for use in the event of oil interruption, which makes the engine structure and layout complex and the cost high.

[0007] The invention provides an aircraft engine.

[0008] According to one aspect of the present invention, there is provided a bearing transmission mechanism with an emergency lubrication function, which is used to be arranged on an aircraft engine. The bearing transmission mechanism with an emergency lubrication function comprises a bearing and a bearing seat. The bearing is mounted on the bearing seat. The axis of the bearing seat has an angle relative to the vertical direction. An oil path is opened inside the bearing seat. An oil hole is arranged below the oil path. The oil path and the oil hole are used to allow the lubricating oil of the aircraft engine to pass through. The bearing comprises an outer ring and a retaining frame. A rolling body is embedded on the retaining frame. The outer ring is sleeved on the outside of the retaining frame and pressed against the rolling body. The outer ring comprises an oil collecting groove and an oil storage groove. The oil collecting groove is arranged directly above the outer ring and is connected with the oil hole for receiving the lubricating oil from the bearing seat. The oil storage groove is connected with the oil collecting groove. The oil storage groove is used to store the lubricating oil. An oil outlet hole is arranged at the bottom of the oil storage groove. The oil outlet hole is used to flow the lubricating oil in the oil storage groove to the rolling body.

[0009] Furthermore, there are a plurality of oil storage tanks, which are arranged around the oil collecting tank, and the depth of the oil storage tank is lower than the depth of the oil collecting tank.

[0010] Furthermore, the oil collecting tank is provided with a channel which is connected with the oil storage tank and is inclined downward in a direction toward the oil storage tank.

[0011] Furthermore, a sealing groove is provided on the outer ring or the bearing seat, the sealing groove is used to install a sealing ring, the sealing ring is used to enclose a sealing ring between the bearing seat and the outer ring, and the oil storage tank and the oil collection tank are both arranged in the sealing area.

[0012] Furthermore, the pressure in the oil collecting tank and the oil storage tank is lower than the oil circuit pressure in the bearing seat.

[0013] Furthermore, one of the outer ring and the bearing seat is provided with a groove, and the other is provided with a boss embedded in the groove, and the boss is used to cooperate with the groove to position the oil collecting groove directly above the bearing.

[0014] Furthermore, the oil collecting groove is arranged at the axial center position of the outer peripheral wall of the outer ring, the oil storage groove is arranged outside the oil collecting groove, and the oil outlet hole is inclined toward one end of the rolling body along the center direction of the rolling body.

[0015] Furthermore, the retaining frame is also provided with a ramp surface and an oil dam. The ramp surface extends outward along the axial direction of the retaining frame and is inclined radially outward at one end away from the rolling body. The oil dam is arranged at the end of the ramp surface away from the rolling body, and the height of the oil dam is greater than the height of the ramp surface.

[0016] Furthermore, the bearing also includes an inner ring, which is embedded in the inner side of the retaining frame and abuts the rolling body. The inner ring is provided with an oil inlet channel, the first end of which is used to connect to the lubricating oil system of the aircraft engine, and the second end of which is arranged toward the rolling body.

[0017] Furthermore, the oil inlet channel includes an axial oil groove and a radial oil groove. The radial oil groove is arranged along the outer wall of the semi-inner ring with the drawing groove, and the axial oil groove is arranged on the inner wall of the semi-inner ring with the drawing groove. The axial oil groove and the radial oil groove are connected to each other to guide the lubricating oil of the normal oil supply system to the inside of the bearing.

[0018] According to yet another aspect of the present invention, there is provided an aircraft engine, the aircraft engine comprising the bearing transmission mechanism with emergency lubrication function.

[0019] The present invention has the following beneficial effects:

[0020] The present invention provides a bearing transmission mechanism with an emergency lubrication function, wherein an oil collecting groove, an oil storage groove, an oil outlet hole and other structures are integrated on the outer ring of the bearing. When the engine is normally supplied with oil, the oil path opened in the bearing seat flows the lubricating oil into the oil collecting groove through the oil hole and enters the oil storage groove for storage. When the engine lubricating oil is interrupted, the lubricating oil stored in the oil storage groove can automatically flow to the inside of the bearing through the oil outlet hole under the action of gravity, thereby playing the emergency oil supply function of lubricating oil interruption. The present invention can reserve a certain amount of lubricating oil by using the bearing's own structure without adding an additional emergency lubrication system. The lubricating oil can directly flow into the inside of the bearing to cope with the lubricating oil interruption condition of the aircraft engine. While reducing the operating risk of the bearing, it also improves the compactness, simplicity and economy of the engine structure.

[0021] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention is further described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 This is the structural explosion diagram of the bearing;

[0024] Figure 2 The radial section of the bearing transmission mechanism with emergency lubrication function Figure 1 ;

[0025] Figure 3 The radial section of the bearing transmission mechanism with emergency lubrication function Figure 2 ;

[0026] Figure 4 for Figure 3 An enlarged view of the bearing transmission mechanism with emergency lubrication function;

[0027] Figure 5 This is a graph showing the relationship between the amount of oil stored in the oil collection tank and the oil storage tank and time under lubricating oil interruption conditions.

[0028] In the figure: 1. semi-inner ring, 2. outer ring, 3. rolling element, 4. retaining cage, 5. semi-inner ring with drawing groove, 6. sealing groove, 7. oil retaining dam, 8. ramp surface, 9. oil storage groove, 10. channel, 11. oil collecting groove, 12. oil outlet hole, 13. drawing groove, 14. radial oil groove, 15. axial oil groove, 16. groove, 17. bearing seat, 18. oil circuit, 19. oil hole, 20. sealing ring, 21. boss. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] See also Figures 1 to 4 The embodiment of the first aspect of the present invention provides a bearing transmission mechanism with an emergency lubrication function, which is used to be arranged on an aircraft engine. The bearing transmission mechanism with an emergency lubrication function includes a bearing and a bearing seat 17. The bearing is installed on the bearing seat 17. The axis of the bearing seat 17 has an angle relative to the vertical direction. An oil passage 18 is opened inside the bearing seat 17. An oil hole 19 is arranged below the oil passage 18. The oil passage 18 and the oil hole 19 are used to allow the lubricating oil of the aircraft engine to pass through; the bearing includes an outer ring 2 and a retainer 4. The retaining frame 4 is embedded with a rolling body 3, the outer ring 2 is sleeved on the outside of the retaining frame 4 and pressed against the rolling body 3, the outer ring 2 includes an oil collecting groove 11 and an oil storage groove 9, the oil collecting groove 11 is arranged directly above the outer ring 2 and is connected with the oil hole 19, and is used to receive the lubricating oil from the bearing seat 17, the oil storage groove 9 is connected with the oil collecting groove 11, the oil storage groove 9 is used to introduce the lubricating oil collected by the oil collecting groove 11 and store the lubricating oil, and an oil outlet hole 12 is provided at the bottom of the oil storage groove 9, and the oil outlet hole 12 is used to flow the lubricating oil in the oil storage groove 9 to the rolling body 3.

[0031] The bearing transmission mechanism with emergency lubrication function described above has a basic bearing structure of a double-half inner ring three-point contact ball bearing. This type of bearing is common in aircraft engines and is often used as a thrust bearing, such as Figure 1 As shown, its components include a semi-inner ring 1, an outer ring 2, rolling elements 3, a cage 4, and a semi-inner ring 5 with a drawing groove, wherein the semi-inner ring 5 with a drawing groove is provided with a drawing groove 13. However, the difference between the bearing provided by the present invention and conventional bearings is mainly that it has a certain emergency lubrication function, which is achieved by a special structural design that is different from the outer ring 2 and the cage 4 of conventional bearings. Figure 2 and Figure 3 As shown, an oil passage 18 is provided inside the bearing seat 17, and the lubricating oil of the engine enters the bearing seat 17, and then enters the oil collecting groove 11 of the bearing through the oil hole 19 provided just above the bearing seat 17; the oil collecting groove 11 is provided just below the oil hole 19, and the oil collecting groove 11 is provided just above the outer ring 2 and is connected with the oil hole 19, and the lubricating oil in the oil collecting groove 11 enters the oil storage tank 9, and flows to the inside of the bearing through the oil outlet 12 below the oil storage tank 9. When the lubricating oil of the engine is interrupted, the lubricating oil stored in the oil storage tank 9 can automatically flow to the inside of the bearing through the oil outlet 12 under the action of gravity, and play the emergency oil supply function when the lubricating oil is interrupted.

[0032] The present invention provides a bearing transmission mechanism with emergency lubrication function, in which an oil collecting groove 11, an oil storage groove 9, an oil outlet hole 12 and other structures are integrated on the bearing outer ring 2. Without adding an additional emergency lubrication system, the bearing itself can store a certain amount of lubricating oil, and the lubricating oil can directly flow into the bearing to cope with the lubricating oil interruption condition of the aircraft engine. While reducing the risk of bearing operation, the compactness, simplicity and economy of the engine structure are also improved.

[0033] In an embodiment of the present invention, the oil storage tanks 9 are provided in a plurality, and the plurality of oil storage tanks 9 are arranged around the oil collection tank 11. The depth of the oil storage tank 9 is lower than the depth of the oil collection tank 11, and the oil collection tank 11 is provided with a channel 10 which is connected with the oil storage tank 9 and is inclined downward in the direction toward the oil storage tank 9. The oil storage tank 9 is used to store lubricating oil. The oil storage tank 9 is connected to the oil collection tank 11. The number of the oil storage tanks 9 can be one, two, three or more. In this embodiment, the oil storage tanks 9 are preferably two. A channel 10 is provided between the oil collection tank 11 and the two oil storage tanks 9 opened just above the outer ring 2. The channel 10 has a downward inclination toward the oil storage tank 9, so that the remaining oil in the oil collection tank 11 can still flow into the oil storage tank 9 when the lubricating oil is interrupted.

[0034] In the embodiment of the present invention, the outer ring 2 or the bearing seat 17 is provided with a sealing groove 6, and the sealing groove 6 is used to install a sealing ring 20, and the sealing ring 20 is used to enclose a sealing area between the bearing seat 17 and the outer ring 2, and the oil storage tank 9 and the oil collection tank 11 are both provided in the sealing area. The sealing groove 6 can be provided on the outer ring 2 or the bearing seat 17, and the sealing area between the bearing seat 17 and the outer ring 2 formed by the sealing ring 20 can prevent the leakage of lubricating oil.

[0035] In the embodiment of the present invention, one of the outer ring 2 and the bearing seat 17 is provided with a groove 16, and the other is provided with a boss 21 embedded in the groove 16. The boss 21 is used to cooperate with the groove 16 to position the oil collecting groove 11 directly above the bearing, and is also used to prevent the outer ring 2 from rotating. Preferably, the groove 16 provided directly below the outer ring 2 is limited by the boss 21 on the bearing seat 17, so that the oil collecting groove 11 is positioned directly above the bearing, and is also used to prevent the outer ring 2 from rotating, so that the lubricating oil in the oil storage tank 9 and the oil collecting groove 11 can automatically flow to the inside of the bearing under the action of gravity, playing a role in emergency lubrication.

[0036] In the embodiment of the present invention, the oil collecting groove 11 is arranged at the central position of the outer peripheral wall of the outer ring 2 in the axial direction, the oil storage groove 9 is arranged outside the oil collecting groove 11, and the oil outlet hole 12 is arranged at an end facing the rolling element 3 in an inclined direction toward the center of the rolling element 3. The oil storage groove 9 is arranged around the oil collecting groove 11 and arranged outside the oil collecting groove. The lubricating oil in the oil collecting groove 11 is guided to the oil storage groove through the channel 10. The oil outlet hole 12 below the oil storage groove plays the role of automatically guiding the lubricating oil from the oil storage groove 9 to flow to the rolling element 3 and the retainer 4 and enter the bearing under the action of gravity. The oil outlet hole 12 is arranged in an inclined manner so that the lubricating oil in the oil storage grooves 9 distributed at different positions can flow to the center of the rolling element 3, achieving a better cooling and lubricating effect, and when the lubricating oil in some oil storage grooves 9 is empty or cannot be supplied due to the flight posture, the oil can continue to be supplied to the center of the rolling element 3 through other oil storage grooves 9.

[0037] In the embodiment of the present invention, the main purpose is to deal with the interruption of lubricating oil. The main lubrication of the bearing is to form a conventional under-ring lubrication by relying on the axial oil groove 15 and the radial oil groove 14 opened in the semi-inner ring 51 with the drawing groove. Therefore, during normal oil supply, the lubricating oil flowing out of the oil outlet hole 12 should only play the role of auxiliary lubrication, and its flow rate should not be too large. Since during normal oil supply, the total lubricating oil flow rate of several oil outlet holes 12 is consistent with the lubricating oil flow rate of the oil hole 19, the size of the oil hole 19 determines the lubricating oil flow rate of auxiliary lubrication during normal oil supply. Under a certain lubricating oil pressure, the larger the diameter of the oil hole 19, the larger the lubricating oil flow rate will be, and the higher the oil supply margin requirement for the lubricating oil system. Therefore, in the present invention, the diameter of the oil hole 19 is designed to be within the oil supply margin of the lubricating oil system. During normal oil supply, before the oil storage tank 9 is filled with lubricating oil, the lubricating oil flow rate of the oil outlet hole 12 is consistent with that when the lubricating oil is interrupted, which is the natural outflow of lubricating oil flow rate. Therefore, the diameter of the oil outlet hole 12 cannot be too large. On the one hand, if the diameter of the oil outlet hole 12 is too large, the oil storage tank 9 cannot be filled with lubricating oil and the emergency lubricating oil cannot be effectively provided when the lubricating oil is interrupted. On the other hand, if the diameter of the oil outlet hole 12 is too large, the outflowing lubricating oil is too dispersed and cannot effectively flow into the bearing. When the lubricating oil is interrupted, the oil passage 18 of the bearing seat 17 no longer provides lubricating oil. At this time, the lubricating oil stored in the oil storage tank 9 automatically flows out through the oil outlet hole 12 under the action of gravity and enters the bearing to provide emergency lubricating oil.

[0038] like Figure 4 As shown, when the engine is normally supplied with oil, the oil pressure in the oil passage 18 in the bearing seat 17 is relatively high, and the lubricating oil flows along the lubricating oil flow direction and quickly fills the oil storage tank 9 with lubricating oil; when the lubricating oil is interrupted, the lubricating oil stored in the oil storage tank 9 flows out along the oil outlet 12 under the action of gravity to perform emergency lubrication on the bearing. When the engine is normally supplied with oil, the speed at which the oil storage tank 9 is filled with lubricating oil depends on the difference in the lubricating oil flow rate between the oil hole 19 and the oil outlet 12 in the natural outflow state under normal oil pressure; when the lubricating oil is interrupted, the consumption time that the oil in the oil storage tank 9 can maintain depends on the lubricating oil flow rate of the oil outlet 12 in the natural outflow state and the volume of the oil storage tank 9.

[0039] In this embodiment, the diameter of the oil hole 19 is designed to be 0.5mm, the oil pressure in the oil circuit 18 is designed to be 0.5MPa during normal oil supply, the diameter of the two oil outlet holes 12 is designed to be 0.8mm, and the total volume of the oil collecting tank 11 and the oil storage tank 9 is designed to be 5ml. According to calculations, during normal oil supply, the oil flow rate of the oil hole 19 is 0.27L / min, and the average lubricating oil flow rate of the two oil outlet holes 12 in a natural outflow state is 0.02L / min. Therefore, the time for the lubricating oil to fill the oil collecting tank 11 and the oil storage tank 9 is about 1.2s. When the lubricating oil is interrupted, the oil hole 19 almost stops discharging oil, and the stored oil in the oil collecting tank 11 and the oil storage tank 9 naturally flows out from the two oil outlet holes 12 under the action of gravity, as shown in FIG. Figure 5As shown, the stored oil in this embodiment can briefly supply lubricating oil for about 15 seconds to the bearing for emergency use when the lubricating oil is interrupted.

[0040] In the embodiment of the present invention, the retainer 4 is also provided with a ramp surface 8 and an oil retaining dam 7. The ramp surface 8 is arranged to extend outwardly along the axial direction of the retainer 4 and is arranged to be inclined outwardly along the radial direction at the end away from the rolling element 3. The oil retaining dam 7 is arranged at the end of the ramp surface 8 away from the rolling element 3, and the height of the oil retaining dam 7 is greater than the height of the ramp surface 8. The retainer 4 is designed to have an oil retaining dam 7 structure, and the outer diameter surface is set as the ramp surface 8, so that the lubricating oil flowing from the oil outlet 12 can overcome the influence of the rotation and swing of the retainer 4 and flow smoothly to the rolling element 3. Considering the influence of the rotation, swing and vibration of the retainer 4 and the internal airflow on the lubricating oil flowing out of the oil outlet 12, the cross-sectional shape above the retainer 4 is designed as a ramp surface 8 with an oil retaining dam 7, so as to keep the lubricating oil inside the bearing as much as possible.

[0041] In an embodiment of the present invention, the bearing further comprises an inner ring, the inner ring is embedded in the inner side of the retaining frame 4 and abuts against the rolling element 3, the inner ring is provided with an oil inlet channel, the first end of the oil inlet channel is used to connect with the lubricating oil system of the aircraft engine, and the second end of the oil inlet channel is arranged toward the rolling element 3; the inner ring comprises two half rings, a half inner ring 1 and a half inner ring 5 with a drawing groove, the oil inlet channel is arranged on the half inner ring 5 with the drawing groove. The oil inlet channel comprises an axial oil groove 15 and a radial oil groove 14, the radial oil groove 14 is arranged along the outer wall of the half inner ring 5 with the drawing groove, the axial oil groove 15 is arranged on the inner wall of the half inner ring 5 with the drawing groove, and the axial oil groove 15 is provided with a channel connected with a normal oil supply system, the axial oil groove 15 and the radial oil groove 14 are connected with each other to guide the lubricating oil to the inside of the bearing for conventional under-ring lubrication. The main lubrication of the bearing is mainly based on the conventional under-ring lubrication formed by the axial oil groove 15 and the radial oil groove 14 provided in the semi-inner ring 5 with the drawing groove, and the lubricating oil flowing out of the oil outlet hole 12 only plays the role of auxiliary lubrication. In addition to the under-ring lubrication, the main lubrication of the bearing can also be other lubrication methods, and the lubrication structure can also be changed, as long as it does not affect the emergency lubrication structure in the present invention.

[0042] An embodiment of the second aspect of the present invention provides an aircraft engine, wherein the aircraft engine includes the bearing transmission mechanism with emergency lubrication function.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearing transmission mechanism with emergency lubrication function, used for being arranged on an aircraft engine, characterized in that: The bearing transmission mechanism with emergency lubrication function comprises a bearing and a bearing seat (17), wherein the bearing is mounted on the bearing seat (17), the axis of the bearing seat (17) has an angle relative to the vertical direction, an oil passage (18) is provided inside the bearing seat (17), an oil hole (19) is provided below the oil passage (18), and the oil passage (18) and the oil hole (19) are used to allow lubricating oil of the aircraft engine to pass through; the bearing comprises an outer ring (2) and a retaining frame (4), a rolling body (3) is embedded in the retaining frame (4), and the outer ring ( 2) is sleeved on the outer side of the retaining frame (4) and pressed against the rolling body (3), the outer ring (2) includes an oil collecting groove (11) and an oil storage groove (9), the oil collecting groove (11) is arranged directly above the outer ring (2) and is connected to the oil hole (19), the oil storage groove (9) is connected to the oil collecting groove (11), the oil storage groove (9) is used to introduce the lubricating oil collected by the oil collecting groove (11) and store the lubricating oil, and the bottom of the oil storage groove (9) is provided with an oil outlet hole (12), and the oil outlet hole (12) is used to flow the lubricating oil in the oil storage groove (9) to the rolling body (3).

2. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: A plurality of the oil storage tanks (9) are provided, and the plurality of the oil storage tanks (9) are arranged around the oil collection tank (11), and the depth of the oil storage tank (9) is lower than the depth of the oil collection tank (11).

3. The bearing transmission mechanism with emergency lubrication function according to claim 2 is characterized in that: The oil collecting tank (11) is provided with a channel (10) which is in communication with the oil storage tank (9) and is inclined downward in a direction toward the oil storage tank (9).

4. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: The outer ring (2) or the bearing seat (17) is provided with a sealing groove (6), the sealing groove (6) is used to install a sealing ring (20), the sealing ring (20) is used to enclose a sealing area between the bearing seat (17) and the outer ring (2), and the oil storage groove (9) and the oil collection groove (11) are both arranged in the sealing area.

5. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: One of the outer ring (2) and the bearing seat (17) is provided with a groove (16), and the other is provided with a boss (21) embedded in the groove (16), and the boss (21) is used to cooperate with the groove (16) to position the oil collecting groove (11) directly above the bearing.

6. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: The oil collecting groove (11) is arranged at the central position of the outer peripheral wall of the outer ring (2) along the axial direction, the oil storage groove (9) is arranged outside the oil collecting groove (11), and the oil outlet hole (12) is arranged at an end toward the rolling body (3) and is inclined in a direction toward the center of the rolling body (3).

7. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: The retaining frame (4) is also provided with a ramp surface (8) and an oil retaining dam (7); the ramp surface (8) is arranged to extend outwardly along the axial direction of the retaining frame (4) and is arranged to be inclined radially outwardly at one end away from the rolling body (3); the oil retaining dam (7) is arranged at one end of the ramp surface (8) away from the rolling body (3), and the height of the oil retaining dam (7) is greater than the height of the ramp surface (8).

8. The bearing transmission mechanism with emergency lubrication function according to claim 1, characterized in that: The bearing further comprises an inner ring, the inner ring comprising a half inner ring (1) and a half inner ring (5) with a drawing groove, the half inner ring (5) with a drawing groove being embedded in the inner side of the retaining frame (4) and abutting against the rolling body (3), the half inner ring (5) with the drawing groove being provided with an oil inlet channel, the first end of the oil inlet channel being used for connecting to the lubricating oil system of the aircraft engine, and the second end of the oil inlet channel being arranged toward the rolling body (3).

9. The bearing transmission mechanism with emergency lubrication function according to claim 8, characterized in that: The oil inlet channel comprises an axial oil groove (15) and a radial oil groove (14); the radial oil groove (14) is arranged along the outer wall of the semi-inner ring (5) with the drawing groove; the axial oil groove (15) is arranged on the inner wall of the semi-inner ring (5) with the drawing groove; the axial oil groove (15) and the radial oil groove (14) are interconnected to guide the lubricating oil of the normal oil supply system to the inside of the bearing.

10. An aircraft engine, characterized in that: The aircraft engine comprises a bearing transmission mechanism with emergency lubrication function as described in any one of claims 1 to 9.

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