Oil recovery and gas guiding assembly, main bearing and aeroengine

Abstract

The present invention discloses an oil collecting and air guiding assembly, a main bearing and an aeroengine, which includes two annular fences arranged at intervals along the axial direction and a plurality of oil collecting blades arranged between the two annular fences and evenly spaced along the circumferential direction. The radially outer end faces of the oil collecting blades and the two annular fences enclose an oil transmission channel, and the radially inner end faces of the oil collecting blades and the two annular fences are used to enclose an oil collecting cavity with the engine main shaft. The adjacent two oil collecting blades and the two annular fences enclose an oil collecting window respectively communicating with the oil transmission channel and the oil collecting cavity. The radially inner end face of the oil collecting blade is convexly provided with a throat oil retaining dam located between the oil collecting window and the oil collecting cavity and a tail oil retaining dam located at the tail of the oil collecting blade. The oil collecting and air guiding assembly further includes an air guiding structure arranged on the annular fence and used to communicate with the oil collecting cavity and the external atmosphere respectively; compared with the prior art, it has a simple structure, small occupied space, high oil collecting efficiency, strong practicability, and is suitable for wide popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oil lubrication, and in particular, to an oil collecting and air guiding assembly. In addition, the present invention also relates to a main bearing including the above-mentioned oil collecting and air guiding assembly. In addition, the present invention also designs an aeroengine including the above-mentioned oil collecting and air guiding assembly. Background Art

[0002] The lubricating oil system of an aeroengine is one of the core systems to ensure the safe operation of the engine. Its functions cover multiple fields, specifically including lubrication and friction reduction, heat dissipation and cooling, cleaning and pollutant control, sealing and leakage prevention, anti-corrosion and rust prevention, auxiliary functions and power transmission, condition monitoring and fault warning, etc., to ensure the reliability and durability of the aeroengine under extreme working conditions. It is an indispensable "blood system" for modern aero power.

[0003] The oil collecting structure in the main bearing of an aeroengine is one of the key designs of the lubricating oil system. When the main bearing rotates at high speed and the lubricating oil is thrown outward by centrifugal force, the oil collecting structure captures the splashing lubricating oil through geometric design, preventing it from spreading disorderly or leaking to non-target areas, quickly guiding the recovered lubricating oil back to the oil pump or redistributing it to other lubrication points, maintaining the circulation efficiency of the lubricating oil system, and reducing lubricating oil consumption.

[0004] As Figure 1 and Figure 2 shown, the commonly used oil collecting structures are divided into axial oil collecting structures and radial oil collecting structures. Among them, with the development of aeroengines, the requirement for thrust-to-weight ratio is continuously increasing. However, the existing axial oil collecting structures have large position limitations and large space occupation, require an obvious gradient in diameter size, and at the same time require an axial space inside the bearing cavity for installing nozzles. Therefore, it is difficult to achieve miniaturization of the structure while meeting the lubrication requirements under the main bearing ring. For the existing radial oil collecting structures, when the main bearing rotates at high speed, a large amount of ventilation will enter the oil collecting cavity after being collected by the blades, but it can only be discharged through the oil outlet structure on the bearing side. Its air guiding ability is low, resulting in too high cavity pressure in the oil collecting cavity, which is not conducive to the collection of lubricating oil and makes the oil collecting efficiency low.

[0005] In summary, the existing oil collecting structures can no longer meet the usage requirements of the main bearings of aeroengines and need to be solved urgently. Summary of the Invention

[0006] The present invention provides an oil collecting and air guiding assembly, a main bearing and an aeroengine to solve the technical problems that the existing oil collecting structures in the main bearings of aeroengines are complex in structure, occupy a large space, or have low oil collecting efficiency.

[0007] According to one aspect of the present invention, there is provided an oil collecting and air guiding assembly, which includes two annular fences arranged at intervals along the axial direction and a plurality of oil collecting blades arranged between the two annular fences and evenly spaced along the circumferential direction. The radially outer end faces of the oil collecting blades and the two annular fences enclose an oil transmission channel, and the radially inner end faces of the oil collecting blades and the two annular fences are used to enclose an oil collecting cavity with the engine main shaft. An oil collecting window communicating with the oil transmission channel and the oil collecting cavity respectively is formed by enclosing two adjacent oil collecting blades and the two annular fences. A throat oil retaining dam for preventing the reverse flow of lubricating oil between the oil collecting window and the oil collecting cavity and a tail oil retaining dam for blocking the outflow of lubricating oil at the tail of the oil collecting blade are convexly provided on the radially inner end face of the oil collecting blade. The oil collecting and air guiding assembly further includes an air guiding structure arranged on the annular fence and used to communicate with the oil collecting cavity and the external atmosphere respectively.

[0008] As a further improvement of the above technical solution:

[0009] Further, the air guiding structure includes an air guiding ring connected to the annular fence and used to axially fit the inner ring of the main bearing to form an annular distribution cavity by enclosing the inner ring of the main bearing and the annular fence, an air guiding window radially opened on the air guiding ring and corresponding to the oil collecting window in the circumferential position, and an air guiding oil retaining dam arranged on the radially inner end face of the air guiding ring and enclosing the edge of the air guiding window. The annular distribution cavity is communicated with the radially inner end of the oil collecting cavity, and the air guiding window is used to communicate with the annular distribution cavity and the external atmosphere respectively.

[0010] Further, the maximum radial height of the radially inner end face of the air guiding oil retaining dam is less than or equal to the minimum radial height of the throat oil retaining dam.

[0011] Further, the air guiding structure includes an air guiding groove I opened on the radially inner end face of the annular fence far from the main bearing, and the circumferential position of the air guiding groove I is arranged opposite to the oil collecting cavity. The air guiding groove I is used to communicate with the radially inner end of the oil collecting cavity and the external atmosphere respectively.

[0012] Further, the maximum radial height of the air guiding groove I is less than the minimum radial height of the throat oil retaining dam.

[0013] Further, the air guiding structure includes an air guiding ring connected to the annular fence and used to axially fit the inner ring of the main bearing to form an annular distribution cavity by enclosing the inner ring of the main bearing and the annular fence, and an air guiding groove II opened on the annular fence and communicated with the oil collecting window and the annular distribution cavity respectively. The annular distribution cavity is communicated with the radially inner end of the oil collecting cavity.

[0014] Further, the maximum radial height of the air guiding groove II is less than the minimum radial height of the throat oil retaining dam.

[0015] Further, the air guiding groove II is arranged far from the throat oil retaining dam.

[0016] According to another aspect of the present invention, there is also provided a main bearing, which includes the above-mentioned oil collecting and air guiding assembly. The main bearing further includes a plurality of oil supply grooves formed in the radially inner end portion, and the inlets of the plurality of oil supply grooves are evenly arranged at intervals in the circumferential area between the throat oil retaining dam and the tail oil retaining dam.

[0017] According to another aspect of the present invention, there is also provided an aeroengine, which includes the above-mentioned oil collecting and air guiding assembly.

[0018] The present invention has the following beneficial effects:

[0019] In the oil collecting and air guiding assembly of the present invention, after arranging a plurality of oil collecting blades between two annular fences, an oil supply channel is formed by enclosing the radially outer end faces of the oil collecting blades and the two annular fences. The radially inner end faces of the oil collecting blades and the two annular fences are used to enclose an oil collecting cavity with the engine main shaft. And an oil collecting window communicating with the oil supply channel and the oil collecting cavity is formed by enclosing two adjacent oil collecting blades and the two annular fences. The splashed lubricating oil is captured through the oil supply channel, transported along the radially outer end faces of the oil collecting blades into the oil collecting window, and then transported along the radially inner end faces of the oil collecting blades into the oil collecting cavity to realize the collection of the lubricating oil. And the throat oil retaining dam and the tail oil retaining dam are used to prevent the leakage of the lubricating oil. During the collection process, the air guiding structure is respectively communicated with the oil collecting cavity and the external atmosphere, so that the gas in the oil collecting cavity can be introduced into the external atmosphere through the air guiding structure, thereby reducing the cavity pressure of the oil collecting cavity, and thus improving the oil collecting efficiency. Compared with the prior art, the present solution has a simple structure, occupies a small space, and without changing the design of the main bearing, improves the radial oil collecting efficiency through the air guiding structure, can effectively reduce the requirements for the main bearing, ensure the structural strength of the main bearing, has strong practicability, and is suitable for wide promotion and application.

[0020] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is a partial structural sectional view of the existing axial oil collecting structure;

[0023] Figure 2 is a partial structural sectional view of the existing radial oil collecting structure;

[0024] Figure 3 is a schematic structural view of the oil collecting and air guiding assembly according to the first preferred embodiment of the present invention;

[0025] Figure 4 is a schematic cross-sectional view of the oil collecting and gas guiding assembly according to the first preferred embodiment of the present invention;

[0026] Figure 5 is a schematic structural view of the oil collecting and gas guiding assembly according to the second preferred embodiment of the present invention;

[0027] Figure 6 is a schematic cross-sectional view of the oil collecting and gas guiding assembly according to the second preferred embodiment of the present invention;

[0028] Figure 7 is a schematic structural view of the oil collecting and gas guiding assembly according to the third preferred embodiment of the present invention;

[0029] Figure 8 is a schematic cross-sectional view of the oil collecting and gas guiding assembly according to the third preferred embodiment of the present invention after being assembled with the engine main shaft;

[0030] Figure 9 is the simulation result of the pressure contour map of the existing radial oil collecting structure;

[0031] Figure 10 is the simulation result of the pressure contour map of the oil collecting and gas guiding assembly according to the preferred embodiment of the present invention.

[0032] Legend:

[0033] 10. Ring-shaped fence; 20. Oil collecting blade; 30. Oil delivery channel; 40. Oil collecting cavity; 50. Oil collecting window; 60. Throat oil retaining dam; 70. Tail oil retaining dam; 81. Gas guiding ring; 82. Ring-shaped distribution cavity; 83. Gas guiding oil retaining dam; 84. Gas guiding window; 85. First gas guiding groove; 86. Second gas guiding groove. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the following.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "central", "end portion", "length", "outer end", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] In addition, in the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] It should be understood that the axial, radial, and circumferential directions of the present invention are all based on the main bearing of the aero-engine.

[0038] Embodiment 1:

[0039] As Figure 3 and Figure 4 shown, the oil collection and gas guiding assembly of this embodiment includes two annular fences 10 arranged at intervals along the axial direction, and a plurality of oil collection vanes 20 arranged between the two annular fences 10 and evenly spaced along the circumferential direction. The radially outer end surfaces of the oil collection vanes 20 and the two annular fences 10 enclose an oil transmission channel 30. The radially inner end surfaces of the oil collection vanes 20 and the two annular fences 10 are used to enclose an oil collection cavity 40 with the engine main shaft. Adjacent two oil collection vanes 20 and the two annular fences 10 enclose an oil collection window 50 that is respectively communicated with the oil transmission channel 30 and the oil collection cavity 40. A throat oil dam 60 for preventing the backflow of lubricating oil and a tail oil dam 70 for blocking the outflow of lubricating oil are convexly provided on the radially inner end surface of the oil collection vane 20 between the oil collection window 50 and the oil collection cavity 40 and at the tail of the oil collection vane 20. The oil collection and gas guiding assembly further includes a gas guiding structure arranged on the annular fence 10 and used to be respectively communicated with the oil collection cavity 40 and the external atmosphere.

[0040] As Figure 3 and Figure 4 shown, specifically, for the oil collection and gas guiding assembly of the present invention, after arranging a plurality of oil collection vanes 20 between the two annular fences 10, an oil transmission channel 30 is enclosed by the radially outer end surfaces of the oil collection vanes 20 and the two annular fences 10. An oil collection cavity 40 is enclosed by the radially inner end surfaces of the oil collection vanes 20 and the two annular fences 10 and the engine main shaft. And adjacent two oil collection vanes 20 and the two annular fences 10 enclose an oil collection window 50 that is respectively communicated with the oil transmission channel 30 and the oil collection cavity 40. The splashed lubricating oil is captured through the oil transmission channel 30, conveyed along the radially outer end surface of the oil collection vane 20 into the oil collection window 50, and then conveyed along the radially inner end surface of the oil collection vane 20 into the oil collection cavity 40 to realize the collection of lubricating oil. And the leakage of lubricating oil is prevented by the throat oil dam 60 and the tail oil dam 70. During the collection process, the gas guiding structure is respectively communicated with the oil collection cavity 40 and the external atmosphere, so that the gas in the oil collection cavity 40 can be introduced into the external atmosphere through the gas guiding structure, thereby reducing the cavity pressure of the oil collection cavity 40, and thus improving the oil collection efficiency. Compared with the prior art, this solution has a simple structure, occupies a small space, and without changing the design of the main bearing, improves the radial oil collection efficiency through the gas guiding structure, can effectively reduce the requirements for the main bearing, ensure the structural strength of the main bearing, has strong practicability, and is suitable for wide promotion and application.

[0041] It should be understood that the communication between the gas guiding structure and the oil collection cavity 40 can be direct communication or indirect communication.

[0042] As Figure 3 and Figure 4 shown, in this embodiment, the air guiding structure includes an air guiding ring 81 connected to the annular fence 10 and used for axially end - fitting the inner ring of the main bearing to enclose an annular distribution cavity 82 with the inner ring of the main bearing and the annular fence 10, an air guiding window 84 radially opened on the air guiding ring 81 and arranged at a circumferential position corresponding to the oil collecting window 50, and an air guiding oil - retaining dam 83 arranged on the radially inner end face of the air guiding ring 81 and surrounding the edge of the air guiding window 84. The annular distribution cavity 82 is communicated with the radially inner end of the oil collecting cavity 40, and the air guiding window 84 is used for communicating with the annular distribution cavity 82 and the external atmosphere respectively.

[0043] As Figure 3 and Figure 4 shown, specifically, the air guiding structure is close to the oil - supply side of the main bearing. The air guiding ring 81 is connected to the annular fence 10, and the axial end face facing away from the annular fence 10 fits the inner ring of the main bearing to enclose an annular distribution cavity 82 with the inner ring of the main bearing and the annular fence 10, and the annular distribution cavity 82 is communicated with the oil collecting cavity 40. Then, by opening the air guiding window 84 on the air guiding ring 81, the lubricating oil and gas in the oil collecting cavity 40 can flow into the annular distribution cavity 82, so as to distribute the lubricating oil through the annular distribution cavity 82, and the gas in the annular distribution cavity 82 is discharged to the external atmosphere through the air guiding window 84, thereby sequentially reducing the cavity pressure in the annular distribution cavity 82 and the oil collecting cavity 40 and improving the oil collecting efficiency. Under the action of the air guiding oil - retaining dam 83, the leakage of lubricating oil from the air guiding window 84 is avoided as much as possible, thus realizing the centrifugal air guiding near the bearing side.

[0044] Optionally, in this embodiment, the air guiding window 84 is arranged in a rectangular shape. In another embodiment, the air guiding window 84 is arranged in a circular shape, triangular shape, inclined groove or inclined hole.

[0045] It should be understood that this embodiment is applicable to the main bearing with a relatively long axial installation dimension.

[0046] As Figure 3 and Figure 4 shown, in this embodiment, the maximum radial height of the radially inner end face of the air guiding oil - retaining dam 83 is less than or equal to the minimum radial height of the throat oil - retaining dam 60.

[0047] As Figure 3 and Figure 4 shown, specifically, after the lubricating oil is introduced into the oil collecting cavity 40 from the oil collecting window 50 and enters the annular distribution cavity 82, by making the maximum radial height of the radially inner end face of the air guiding oil - retaining dam 83 less than or equal to the minimum radial height of the throat oil - retaining dam 60, the leakage of lubricating oil from the air guiding window 84 is avoided as much as possible.

[0048] Optionally, there are multiple air guiding windows 84, and the air guiding windows 84 and the oil collecting windows 50 are arranged in one-to-one correspondence to improve the air guiding ability and thus indirectly improve the oil collecting efficiency.

[0049] It should be understood that the shape, position, quantity and flow area of the air guiding window 84 can all be adaptively set according to requirements.

[0050] It should be understood that the maximum radial height, axial thickness and formation of the radial inner end face of the air guiding oil dam 83 can all be adaptively set according to requirements.

[0051] It should be understood that the shape of the air guiding window 84 is associated with the lubricating oil flow condition in the annular distribution cavity 82.

[0052] It should be understood that the position of the air guiding window 84 is associated with the lubricating oil distribution among the oil delivery grooves in the main bearing. Therefore, the air guiding window 84 is arranged close to the oil collecting window 50 to make the circumferential distribution of the lubricating oil uniform and minimize the restriction on the lubricating oil flow ability.

[0053] Optionally, the number of the air guiding windows 84 is not less than the number of the oil collecting vanes 20 to ensure stable air guiding ability and uniform circumferential distribution of the lubricating oil.

[0054] Optionally, the maximum radial height of the radial inner end face of the air guiding oil dam 83 is properly set, which can also reduce the lubricating oil leakage while ensuring the air guiding ability.

[0055] It should be understood that the greater the maximum radial height of the radial inner end face of the air guiding oil dam 83, the stronger the air guiding ability, but the lubricating oil leakage increases; the smaller the maximum radial height of the radial inner end face of the air guiding oil dam 83, the weaker the air guiding ability, and the lubricating oil leakage increases.

[0056] It should be understood that the thickness of the air guiding oil dam 83 is associated with the space requirement and the process. A larger thickness of the air guiding oil dam 83 requires a larger space; a lower thickness of the air guiding oil dam 83 requires a higher process.

[0057] It should be understood that the shape of the air guiding oil dam 83 is associated with the air flow at the position of the air guiding window 84 and the lubricating oil flow condition in the annular distribution cavity 82.

[0058] Such as Figure 9 and Figure 10 As shown, by comparison, it can be seen that for the oil collecting and air guiding assembly of this embodiment, compared with the existing radial oil collecting structure, the chamber pressure of the oil collecting chamber 40 is significantly reduced (the maximum value is reduced from about 200 kPa to about 60 kPa). After the chamber pressure of the oil collecting chamber 40 is reduced, it is beneficial for the lubricating oil to enter the oil collecting chamber 40, thereby improving the oil collecting efficiency.

[0059] Embodiment Two:

[0060] Such asFigure 5 and Figure 6 As shown in Figure 6 , the difference between this embodiment and the first embodiment is that the air guiding structure includes an air guiding groove 85 formed on the radial inner end surface of the annular fence 10 away from the main bearing. The circumferential position of the air guiding groove 85 is arranged opposite to the oil collecting cavity 40. The air guiding groove 85 is used to communicate with the radial inner end of the oil collecting cavity 40 and the external atmosphere respectively.

[0061] As Figure 5 and Figure 6 shown, specifically, by forming the air guiding groove 85 on the radial inner end surface of the annular fence 10 away from the main bearing, the gas in the oil collecting cavity 40 is discharged to the external atmosphere through the air guiding groove 85, thereby reducing the chamber pressure of the oil collecting cavity 40, improving the exhaust efficiency, realizing air guiding on the side away from the bearing, and being applicable to the main bearing with an air outlet on the side away from the bearing, that is, the gas in the oil collecting cavity 40 is discharged to the external atmosphere through the air guiding groove 85 and the air opening in sequence.

[0062] As Figure 5 and Figure 6 shown, in this embodiment, the maximum radial height of the air guiding groove 85 is less than the minimum radial height of the throat oil retaining dam 60. Specifically, after the lubricating oil enters the oil collecting cavity 40, by making the maximum radial height of the air guiding groove 85 less than the minimum radial height of the throat oil retaining dam 60, the lubricating oil is prevented from flowing from the air guiding groove 85 to the non-bearing groove, thereby avoiding lubricating oil leakage.

[0063] Optionally, the air guiding structure further includes an air guiding ring 81 connected to the annular fence 10 and used for axially fitting the inner ring of the main bearing to form an annular distribution cavity 82 with the inner ring of the main bearing and the annular fence 10.

[0064] Optionally, there are multiple air guiding grooves 85. The air guiding capacity is improved through the multiple air guiding grooves 85, so as to indirectly improve the oil collecting efficiency.

[0065] Optionally, the air guiding groove 85 is arranged close to the throat oil retaining dam 60, so that the air guiding capacity is limited, the air resistance at the position of the throat oil retaining dam 60 is reduced, and the oil collecting efficiency is increased, which is applicable to the main bearing with strong lubricating oil flow capacity; because when the lubricating oil flow capacity is insufficient, the lubricating oil in the oil collecting cavity 40 will accumulate, waves will form from the throat oil retaining dam 60 during the oil collecting process, and the wave amplitude at the position close to the throat oil retaining dam 60 is larger, and the lubricating oil is easy to leak from the air guiding groove 85.

[0066] It should be understood that the maximum radial height, circumferential position relative to the throat oil retaining dam 60, circumferential angle occupied, and number of the air guiding groove 85 can all be adaptively set according to requirements.

[0067] It should be understood that the maximum radial height of the first air guide groove 85 is associated with the air guiding capacity and the oil collecting efficiency. When the maximum radial height of the first air guide groove 85 increases, the air guiding capacity is enhanced, the oil collecting efficiency is improved, and the lubricating oil leakage amount increases; when the maximum radial height of the first air guide groove 85 decreases, the air guiding capacity is weakened, the oil collecting efficiency is reduced, and the lubricating oil leakage amount decreases.

[0068] It should be understood that the circumferential angle occupied by the first air guide groove 85 is associated with the air guiding capacity, the oil collecting efficiency, and the oil leakage amount. The larger the circumferential angle occupied by the first air guide groove 85, the stronger the air guiding capacity of the first air guide groove 85, the higher the oil collecting efficiency, and the more the oil leakage amount; conversely, the smaller the circumferential angle occupied by the first air guide groove 85, the weaker the air guiding capacity of the first air guide groove 85, the lower the oil collecting efficiency, and the less the oil leakage amount.

[0069] It should be understood that the oil leakage amount mainly depends on the maximum radial height of the first air guide groove 85.

[0070] Optionally, the number of the first air guide grooves 85 is increased, but the circumferential angle occupied by a single first air guide groove 85 is decreased, so as to ensure the air guiding capacity while making the radial inner end face of the annular fence 10 contact the engine main shaft evenly and the structure stable.

[0071] Embodiment 3:

[0072] As Figure 7 and Figure 8 shown, the difference between this embodiment and Embodiment 1 is that the air guiding structure includes an air guiding ring 81 connected to the annular fence 10 for axially end-face fitting with the inner ring of the main bearing to form an annular distribution cavity 82 together with the inner ring of the main bearing and the annular fence 10, and a second air guide groove 86 opened on the annular fence 10 and communicating with the oil collecting window 50 and the annular distribution cavity 82 respectively. The annular distribution cavity 82 communicates with the radial inner end of the oil collecting cavity 40.

[0073] As Figure 7 and Figure 8 shown, specifically, the annular distribution cavity 82 is formed by enclosing with the air guiding ring 81, so as to conduct lubricating oil distribution through the annular distribution cavity 82, and then the second air guide groove 86 is used to communicate the oil collecting window 50 and the annular distribution cavity 82, so that the gas in the oil collecting cavity 40 is discharged to the external atmosphere through the annular distribution cavity 82, the second air guide groove 86, and the oil collecting window 50 in sequence, which is applicable to the main bearing in which the annular distribution cavity 82 can occupy a relatively large axial space.

[0074] As Figure 7 and Figure 8As shown, in this embodiment, the maximum radial height of the second air guide groove 86 is less than the minimum radial height of the throat oil baffle 60. Specifically, by making the maximum radial height of the second air guide groove 86 less than the minimum radial height of the throat oil baffle 60, during the process of lubricating oil being distributed through the annular distribution cavity 82, it is possible to prevent the lubricating oil from flowing from the second air guide groove 86 to the oil collection window 50, and to minimize lubricating oil leakage.

[0075] In this embodiment, the second air guide groove 86 is arranged away from the throat oil baffle 60. Specifically, the second air guide groove 86 is located on the annular fence 10 near the bearing and is close to the tail of the previous oil collection blade 20, so as to improve the air guiding ability, reduce the air resistance of the throat oil baffle 60, and increase the oil collection efficiency.

[0076] It should be understood that the maximum radial height of the second air guide groove 86 is associated with the air guiding ability, oil collection efficiency, and oil leakage amount. By reasonably setting the maximum radial height of the second air guide groove 86, it is possible to ensure appropriate air guiding ability, increase the oil collection efficiency, and ensure an appropriate oil leakage amount.

[0077] It should be understood that the circumferential angle occupied by the second air guide groove 86 is associated with the air guiding ability, oil collection efficiency, and oil leakage amount. The larger the circumferential angle occupied by the second air guide groove 86, the stronger the air guiding ability of the second air guide groove 86, the higher the oil collection efficiency, and the more the oil leakage amount; conversely, the smaller the circumferential angle occupied by the second air guide groove 86, the weaker the air guiding ability of the second air guide groove 86, the lower the oil collection efficiency, and the less the oil leakage amount.

[0078] Optionally, the number of the second air guide grooves 86 is increased, but the circumferential angle occupied by a single second air guide groove 86 is decreased, so as to ensure the air guiding ability while making the radial inner end face of the annular fence 10 contact the engine main shaft evenly and the structure stable.

[0079] Embodiment Four:

[0080] The main bearing of this embodiment includes the oil collection and air guiding assembly in any of the above embodiments. The main bearing further includes a plurality of oil delivery grooves opened on the radial inner end portion, and the inlets of the plurality of oil delivery grooves are evenly spaced in the circumferential region between the throat oil baffle 60 and the tail oil baffle 70.

[0081] It should be understood that in the existing main bearing, the oil delivery grooves are evenly spaced circumferentially, so that the circumferential positions of the inlets of some oil delivery grooves are located on the side of the oil collection window 50, which prevents the pressure relief ability of the oil delivery grooves from being fully exerted and the lubricating oil flow capacity is low.

[0082] Specifically, in the present application, by arranging the inlets of multiple oil pipelines evenly spaced in the circumferential area between the throat oil dam 60 and the tail oil dam 70, and the oil collection chamber 40 is located between the throat oil dam 60 and the tail oil dam 70, the oil pipelines corresponding to the same position in the oil collection chamber 40 are evenly distributed, so as to make full use of the flow capacity of the liquid pipelines. Compared with the prior art, fewer oil pipelines are required to achieve the same oil collection efficiency.

[0083] Embodiment 5:

[0084] The aeroengine of this embodiment includes the oil collection and air guiding assembly in any of the above embodiments. Specifically, since the technical effects of the aeroengine provided in this embodiment are the same as those of the oil collection and air guiding assembly provided in the above embodiments, they will not be elaborated here.

[0085] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An oil collecting and air guiding component, characterized in that: The invention comprises two annular fences (10) arranged at intervals in the axial direction and a plurality of oil collecting blades (20) arranged between the two annular fences (10) and evenly arranged at intervals in the circumferential direction, wherein the radial outer end surfaces of the oil collecting blades (20) and the two annular fences (10) are enclosed to form an oil delivery channel (30), the radial inner end surfaces of the oil collecting blades (20) and the two annular fences (10) are used to enclose with the main shaft of the engine to form an oil collecting cavity (40), and the adjacent two oil collecting blades (20) and the two annular fences (10) are enclosed to form an oil collecting cavity (40). An oil collecting window (50) is respectively connected to the oil delivery channel (30) and the oil collecting cavity (40); a throat oil retaining dam (60) for preventing the backflow of lubricating oil and a tail oil retaining dam (70) for preventing the outflow of lubricating oil are convexly provided on the radial inner end surface of the oil collecting blade (20) and are located between the oil collecting window (50) and the oil collecting cavity (40); and the oil collecting air guide assembly further comprises an air guide structure arranged on the annular fence (10) and respectively connected to the oil collecting cavity (40) and the external atmosphere; The air guide structure comprises an air guide ring (81) connected to the annular fence (10) and used for the axial end face to fit the inner ring of the main bearing so as to enclose the inner ring of the main bearing and the annular fence (10) to form an annular distribution chamber (82), and an air guide groove 2 (86) opened on the annular fence (10) and respectively connected to the oil collection window (50) and the annular distribution chamber (82), and the annular distribution chamber (82) is connected to the radial inner end of the oil collection chamber (40).

2. The oil collecting and air guiding assembly according to claim 1, characterized in that: The maximum radial height of the second air guide groove (86) is smaller than the minimum radial height of the throat oil retaining dam (60).

3. The oil collecting and air guiding assembly according to claim 1, characterized in that: The second air guide groove (86) is arranged away from the throat oil retaining dam (60).

4. A main bearing, characterized in that: The main bearing comprises an oil collecting and air guiding assembly as described in any one of claims 1 to 3, and further comprises a plurality of oil delivery grooves opened on the radial inner end portion, wherein the inlets of the plurality of oil delivery grooves are evenly spaced and arranged in a circumferential area between the throat oil retaining dam (60) and the tail oil retaining dam (70).

5. An aircraft engine, characterized in that: The invention comprises the oil collecting and air guiding component as described in any one of claims 1 to 3.

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