Oil collection sealing integrated nut and bearing lubricating structure

Abstract

The oil receiving and sealing integrated nut arranged on the rotating shaft in a sleeving mode comprises an oil receiving part and a sealing part, and an oil lubricating groove is formed in the surface of the oil receiving part and adjoins a bearing on the rotating shaft; the sealing part and the oil collecting part form an integrated piece, the sealing part is provided with an inner peripheral thread used for being connected with an outer peripheral thread of a rotating shaft, and then the integrated nut is fixed to the rotating shaft. According to the oil collection sealing integrated nut, the axial distance can be shortened, the assembling difficulty is simplified, the number of parts is reduced, and the mass of an engine is reduced. The utility model further provides a bearing lubricating structure comprising the oil collecting and sealing integrated nut.

Description

Technical Field

[0001] The utility model relates to the field of aero - engines, and particularly to the field of an integrated nut. Background Art

[0002] The structure of an aero - engine is complex, with a large number and variety of parts. The manufacturing precision of parts is high, and the assembly of components and the whole engine is extremely difficult. For some pivot shaft systems of aero - engines, a structure form of a bearing plus an oil collecting ring and a sealing component is generally adopted. The engine with this structure realizes the rotor support, lubricating oil collection and sealing of the engine. However, the function of the additional nut is to compress the shaft system. The single - function nut increases the axial distance of the engine and thus increases the engine mass. Summary of the Utility Model

[0003] An object of the utility model is to provide an oil collecting and sealing integrated nut, which can shorten the axial distance, simplify the assembly difficulty and the number of parts.

[0004] The oil collecting and sealing integrated nut for achieving the above object is sleeved on a rotating shaft, and includes an oil collecting part and a sealing part. An oil groove is arranged on the surface of the oil collecting part, adjacent to the bearing on the rotating shaft. The sealing part and the oil collecting part form an integral part. The sealing part is provided with an internal thread for connecting with the external thread of the rotating shaft, so as to fix the integrated nut on the rotating shaft.

[0005] In one or more embodiments, an end labyrinth is further arranged at the end of the sealing part, and the end labyrinth is used for sealing with the outer shell.

[0006] In one or more embodiments, the oil collecting part is located at a first radial position, and the end labyrinth is located at a second radial position.

[0007] In one or more embodiments, a force - applying and stopping groove is arranged at the tail end of the sealing part.

[0008] In one or more embodiments, the oil groove includes a radial oil groove and a circumferential notch.

[0009] In one or more embodiments, the oil collecting part further includes a baffle.

[0010] In one or more embodiments, at least part of the internal thread is located on the inner circumferential surface of the oil collecting part.

[0011] Another object of the utility model is to provide a bearing lubrication structure, including the above - mentioned oil collecting and sealing integrated nut. The oil collecting and sealing integrated nut and the bearing are sleeved on the outside of the rotating shaft in sequence.

[0012] In one or more embodiments, the bearing is a pivot bearing or a rolling bearing.

[0013] The above integrated nut integrates the functions of an oil collecting ring and a seal, integrates the nut with the two, omits the additional nut, simplifies the installation steps, significantly reduces the axial distance of the engine, thereby reducing the mass of the engine and improving the working performance of the engine. Description of the Drawings

[0014] The above and other features, properties and advantages of the present utility model will become more obvious through the following description with reference to the drawings and embodiments, where:

[0015] Figure 1 is a schematic structural diagram of a traditional rotor assembly;

[0016] Figure 2 is a schematic structural diagram of the integrated nut.

[0017] Description of Symbol Marks

[0018] 10 Rotating shaft

[0019] 11 Bearing

[0020] 12 Oil collecting ring

[0021] 13 Sealing assembly

[0022] 14 Nut

[0023] 15 End labyrinth

[0024] 20 Integrated nut

[0025] 201 Oil collecting part

[0026] 202 Sealing part

[0027] 203 Inner peripheral thread

[0028] 204 Force application stop groove

[0029] 208 Baffle

[0030] 101 Outer peripheral thread Detailed Embodiment

[0031] The present utility model will be further described below in conjunction with specific embodiments and the drawings. More details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present utility model. Therefore, the protection scope of the present utility model should not be limited by the content of this specific embodiment.

[0032] It should be noted that these and subsequent other drawings are only for illustration purposes and are not drawn under the condition of equal proportion, and should not be used to limit the actual protection scope required by the present utility model.

[0033] It should be noted that in the following description, terms such as "first" and "second" are used to limit components only for the convenience of differentiating the corresponding components. Without additional declaration, the above terms have no special meaning and do not represent primary or secondary, so it cannot be understood as a limitation to the protection scope of the present application.

[0034] The engine main shaft refers to the shaft that connects the main moving components inside the engine and transmits power, and is one of the key components in the engine. The engine bearing is arranged outside the main shaft and is a mechanical element used to support and reduce the friction between rotating or sliding components. The main shaft supports and stabilizes the rotating components through cooperation with the bearing to ensure its smooth operation.

[0035] Effectively lubricating and cooling the bearing is an important task of the engine. In some cases, an oil collecting ring is used to lubricate and cool the bearing.

[0036] Figure 1 The structure of the end of a traditional rotor assembly is shown, and the bearing 11 is sleeved outside the rotating shaft 10. For some fulcrum shaft systems of aeroengines, a structural form of axial cooperation of the bearing 11, the oil collecting ring 12, the sealing assembly 13, and the nut 14 is generally adopted.

[0037] Specifically, both the bearing 11 and the oil collecting ring 12 are sleeved outside the rotating shaft 10. The oil collecting ring 12 is arranged on one side of the bearing 11. After the lubricating oil is sprayed out at a certain speed through the nozzle, it is collected by the oil collecting ring 12 and then flows into the gap between the rotating shaft and the bearing, and is supplied to the bearing under the action of centrifugal force to achieve the lubricating and cooling effects on the bearing. The sealing assembly 13 provides the end labyrinth teeth 15 for cooperation with the external housing to achieve the sealing function with the external housing.

[0038] However, this structure requires the oil collecting ring 12 and the sealing assembly 13 to be axially installed in sequence, and an additional nut 14 is required to achieve axial compression. This setting makes there are more parts in this part, increasing the assembly difficulty, and at the same time increasing the axial distance of the engine, thereby increasing the engine mass.

[0039] Excessive engine mass will increase fuel consumption, affect flight performance, and also increase the structural burden and maintenance cost, having many disadvantages.

[0040] In view of this, the present utility model proposes an oil collecting and sealing integrated nut. Referring to Figure 2 As shown, the oil collecting and sealing integrated nut 20 is sleeved on the rotating shaft 10 and includes an oil collecting part 201 and an oil collecting part 202.

[0041] The surface of the oil collection part 201 is provided with an oil sump, which is arranged adjacent to the bearing 11 on the rotating shaft 10 and is used to supply lubricating oil to the bearing 11.

[0042] In some embodiments, the oil sump includes a radial oil sump and a circumferential notch to introduce the lubricating oil into the interior of the bearing 11 for lubricating and cooling the bearing 11. The oil collection part may further include a baffle 208 located on one axial side.

[0043] The bearing 11 includes, but is not limited to, types such as a pivot bearing and a lubricating bearing.

[0044] The sealing part 202 and the oil collection part 201 form an integral part. The sealing part 202 is provided with an internal circumferential thread 203 for connecting with the external circumferential thread 101 of the rotating shaft 10, thereby fixing the integrated nut on the rotating shaft 10. The integral part has an internal circumferential thread 203 to form an integrated nut 20 with functions of oil collection and sealing.

[0045] In some embodiments, part of the internal circumferential thread 203 may be located on the internal circumferential surface of the oil collection part 201.

[0046] Through the above integrated nut provided integrally, there is no need to apply axial force to different components and use the nut 14 to axially compress again. Instead, only the cooperation of the external circumferential thread 101 and the internal circumferential thread 203 is required to directly connect the integrated nut and the rotating shaft, thereby simplifying the number of components in this part, reducing the axial distance of the engine, and further reducing the mass of the engine; and simplifying the installation steps of the structure in this part, without multiple fastening and position adjustment, reducing the processing and assembly difficulty of the engine.

[0047] In some embodiments, the end of the sealing part 202 is further provided with an end labyrinth 15, and the end labyrinth 15 is used to achieve sealing with the external housing.

[0048] In Figure 2 In the shown embodiment, the oil collection part 201 is located at the first radial position, and the end labyrinth 15 is located at the second radial position, and there is a certain radial distance between the two.

[0049] To provide a force application part, the tail end of the sealing part 202 is provided with a force application stop groove 204, and the force application stop groove 204 may be the same as the rear end of the traditional engine nut and is a blind hole.

[0050] The above integrated nut integrates the oil collection ring, the sealing structure and the nut as an integrated overall structure, significantly shortening the distance of the original nut, further shortening the axial dimension of the engine, and reducing the mass of the engine; the integrated nut integrates the functions of oil collection and sealing, effectively reducing the types and quantities of parts and reducing the manufacturing cost of the engine.

[0051] Combined with the introduction of the above integrated nut, a bearing lubrication structure can also be understood, which includes the above oil-collecting and sealing integrated nut, and the oil-collecting and sealing integrated nut and the bearing are sequentially sleeved outside the rotating shaft. This lubrication structure has fewer component numbers and a more concise installation structure.

[0052] The bearing can be a pivot bearing or a rolling bearing.

[0053] Specific terms are used in this application to describe the embodiments of this application. For example, "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0054] In the description of this application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of this application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0055] Although the present utility model is disclosed above with preferred embodiments, it is not used to limit the present utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present utility model. Therefore, all modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model fall within the protection scope defined by the claims of the present utility model.

Claims

1. The oil collecting seal integrated nut is sleeved on the rotating shaft and is characterized in that: include: An oil collecting portion, the surface of which is provided with an oil groove and is adjacent to the bearing on the rotating shaft; The sealing part and the oil collecting part form an integral part. The sealing part is provided with an inner peripheral thread for connecting with the outer peripheral thread of the rotating shaft, thereby fixing the integrated nut on the rotating shaft.

2. The oil collecting seal integrated nut according to claim 1, characterized in that: The end of the sealing portion is also provided with end comb teeth, and the end comb teeth are used to achieve sealing with the outer peripheral shell.

3. The oil collecting seal integrated nut according to claim 2, characterized in that: The oil collecting portion is located at a first radial position, and the end comb teeth are located at a second radial position.

4. The oil collecting seal integrated nut according to claim 1, characterized in that: A force-applying stop groove is provided at the tail end of the sealing portion.

5. The oil collecting seal integrated nut according to claim 1, characterized in that: The lubricating oil groove comprises a radial lubricating oil groove and a circumferential notch.

6. The oil collecting seal integrated nut according to claim 5, characterized in that: The oil collecting portion further includes a baffle.

7. The oil collecting seal integrated nut according to claim 1, characterized in that: At least a portion of the inner circumferential threads is located on the inner circumferential surface of the oil receiving portion.

8. Bearing lubrication structure, characterized in that: It comprises the oil collecting seal integrated nut as described in any one of claims 1 to 7, wherein the oil collecting seal integrated nut and the bearing are sequentially sleeved on the outside of the rotating shaft.

9. The bearing lubrication structure according to claim 8, characterized in that: The bearing is a fulcrum bearing or a rolling bearing.

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