Bearing inner ring supporting ring integrated with sealing function

Abstract

The invention provides a bearing inner ring supporting ring integrated with a sealing function, and belongs to the field of aero-engines, the bearing inner ring supporting ring comprises a transverse part and a vertical part, the outer surface of an axial part is provided with a bearing inner ring matching surface, and the side, away from a radial part, of the bearing inner ring matching surface is provided with an external thread used for axial compression of a bearing inner ring; an oil collecting ring is arranged at the position, corresponding to a bearing inner ring matching face, of the inner surface of the axial part, an oil blocking wall and a radial positioning face are arranged on the two sides of an oil collecting ring groove respectively, an oil supply hole is formed in the axial part within the range of the oil collecting ring groove, the oil supply hole is communicated with the oil collecting ring groove and the bearing inner ring matching face, and an oil accumulating groove is formed in the end of the axial part through an end face and a cylindrical face. An oil throwing hole is formed in the outer surface from the oil accumulating groove to the axial portion, a gas sealing labyrinth ring and an oil sealing labyrinth ring are arranged at the radial end of the vertical portion, oil throwing teeth are arranged at the end of the oil sealing labyrinth ring, the axial rear side face of the vertical portion forms an axial positioning face, an axial sunk screw hole is formed in the axial positioning face, and a sealing groove is formed in the axial positioning face.

Description

Technical Field

[0001] The present application belongs to the field of aero-engine technology, and in particular relates to a bearing inner ring support ring with integrated sealing function. Background Art

[0002] When an aircraft engine is operating, its rotor rotates at high speed around its center of rotation, supported by pivot bearings. The rollers of the pivot bearings are mounted on the inner ring of the bearing, a crucial support component for the rotor. Sealing rings are typically installed at both ends of the bearing cavity. These seals, introduced through the air system, seal the bearing cavity tightly, preventing oil leakage.

[0003] like Figure 1 As shown, the bearing inner ring 11 of a common pivot bearing 10 in the prior art is directly mounted on a rotating shaft 12 and secured by a locking ring 13. The rotating shaft 12 is screwed to a bearing cavity sealing grate ring 14. This structural solution is suitable for rotor structures with limited installation space and no conditions for split screw connections, but it also has high manufacturing and maintenance costs. Summary of the Invention

[0004] The purpose of the present application is to provide a bearing inner ring support ring with integrated sealing function to solve or alleviate at least one problem in the background technology.

[0005] The technical solution of the present application is: a bearing inner ring support ring with integrated sealing function, comprising a transverse portion and a vertical portion, wherein the transverse portion and the vertical portion are an integrated structure;

[0006] The outer surface of the axial part is provided with a bearing inner ring mating surface, and the side of the bearing inner ring mating surface away from the radial part is provided with an external thread for axially pressing the bearing inner ring, and the inner surface of the axial part corresponding to the bearing inner ring mating surface is provided with an oil collecting ring at a position corresponding to the bearing inner ring mating surface, and the two sides of the oil collecting ring groove are respectively provided with an oil retaining wall and a radial positioning surface. The axial part is provided with at least one oil supply hole within the range of the oil collecting ring groove, and the oil supply hole connects the oil collecting ring groove and the bearing inner ring mating surface, and the lubricating oil collected by the oil collecting ring groove is supplied to the bearing inner ring that is in contact with the bearing inner ring mating surface through the oil supply hole. The end of the axial part close to the vertical part is constructed with an oil accumulation groove using the end face and the cylindrical surface to collect the lubricating oil seeping from between the radial positioning surface and the rotating shaft mating surface, and an oil throwing hole is provided from the oil accumulation groove to the outer surface of the axial part, and the lubricating oil gathered in the oil accumulation groove is guided to the bearing cavity through the oil throwing hole.

[0007] An air sealing grate ring and an oil sealing grate ring are provided at the radial end of the vertical portion, and an oil-sealing grate ring is provided at the end of the oil-sealing grate ring. The axial rear side surface of the vertical portion constitutes an axial positioning surface, an axial countersunk screw hole is provided on the axial positioning surface, and a sealing groove is provided on the axial positioning surface for installing a sealing ring.

[0008] In a preferred embodiment of the present application, the axial dimension of the matching surface of the bearing inner ring is the same as or similar to the width of the bearing inner ring.

[0009] In a preferred embodiment of the present application, the axial length of the oil collecting ring groove is greater than the axial length of the matching surface of the bearing inner ring.

[0010] In a preferred embodiment of the present application, the oil retaining wall is arranged on the side of the oil collecting ring groove away from the radial portion, the radial positioning surface is arranged on the side of the oil collecting ring groove close to the radial portion, and the axial length of the radial positioning surface at least covers the axial position of the center of gravity of the bearing inner ring support ring.

[0011] In a preferred embodiment of the present application, the axis of the oil supply hole has a predetermined angle with the engine axis.

[0012] In a preferred embodiment of the present application, there is a height difference between the air sealing grate ring and the oil sealing grate ring in radial direction.

[0013] In a preferred embodiment of the present application, the oil flinger 223 is bent outward.

[0014] In a preferred embodiment of the present application, the sealing ring is an O-ring.

[0015] The bearing inner ring support ring with integrated sealing function provided in the present application integrates the air sealing grate ring 221 and the oil sealing grate ring 222 into the bearing inner ring support ring, which can effectively utilize the limited installation space and does not require the use of bolt connections to complete the use requirements of installing the sealing ring on the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0017] Figure 1 The figure is a schematic diagram of the structure of the inner ring and sealing ring of a certain type of aircraft engine bearing in the prior art.

[0018] Figure 2 This is a schematic diagram of the bearing inner ring support ring structure with integrated sealing function of this application.

[0019] Figure 3 This is a schematic diagram of the oil-slinging hole angle in this application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0021] The present application provides a bearing inner ring support ring with integrated sealing function, which can realize the functional requirements of arranging the roller bearing inner ring support ring and the bearing cavity grate sealing ring in a narrow space, thereby reducing the manufacturing and maintenance costs of the entire machine.

[0022] like Figure 2 As shown, the bearing inner ring support ring 20 with integrated sealing function provided by the present application includes an axial portion 21 and a radial portion 22, and the axial portion 21 and the radial portion 22 are an integrated structure.

[0023] The outer surface of the axial portion 21 in the present application (i.e., the side away from the engine axis) is provided with a bearing inner ring mating surface 211. The bearing inner ring mating surface 211 constitutes the radial positioning surface of the bearing inner ring. The side of the bearing inner ring mating surface 211 away from the radial portion 22 is provided with an external thread 212. The bearing inner ring is tightened by a nut mounted on the external thread 212. In some embodiments of the present application, the axial dimension of the bearing inner ring mating surface 211 is generally the same as or similar to the width of the bearing inner ring. For example, the axial dimension of the bearing inner ring mating surface 211 is 0.1 mm less than the width of the bearing inner ring, thereby allowing the nut mounted on the external thread 212 to abut the bearing inner ring and lock it.

[0024] An oil collecting ring groove 215 is provided on the inner surface of the axial portion 21 (i.e., the side closest to the engine axis) corresponding to the bearing inner ring mating surface 211. Oil retaining walls 213 and radial positioning surfaces 214 are provided on either side of the oil collecting ring groove 215. The raised height of the oil retaining wall 213 is no higher than the height of the radial positioning surface 214. In this application, the oil retaining wall 213 is provided to collect the lubricating oil sprayed into the oil collecting ring groove 215 from the lubricating oil supply device, significantly improving the oil collection efficiency. In a preferred embodiment of this application, the axial length of the oil collecting ring groove 215 is greater than the axial length of the bearing inner ring mating surface 211, thereby allowing the oil collecting ring groove 215 to collect more lubricating oil. The bearing inner ring support ring 20 is fixed to the rotating shaft (not shown) by the radial positioning surface 214, so that the radial positioning surface 214 serves as the centering surface of the bearing inner ring support ring 20. Due to the existence of the radial portion 22, the overall center of gravity of the bearing inner ring support ring 20 must be biased toward the side of the radial portion 22. Therefore, in this application, the oil retaining wall 213 is set on the side of the oil collecting ring groove 215 away from the radial portion 22, and the radial positioning surface 214 is set on the side of the oil collecting ring groove 215 close to the radial portion 22, and the axial length of the radial positioning surface 214 at least covers the axial position of the center of gravity of the bearing inner ring support ring 20, so that the radial positioning surface 214 can support the bearing inner ring support ring 20 more stably.

[0025] At least one oil supply hole 216 is provided within the oil collecting ring groove 215 of the axial portion 21. This oil supply hole 216 connects the oil collecting ring groove 215 with the bearing inner ring mating surface 211. Lubricating oil collected by the oil collecting ring groove 215 is supplied through the oil supply hole 216 to the bearing inner ring, which is in close contact with the bearing inner ring mating surface 211, thereby providing lubrication and cooling for the bearing rollers. In a preferred embodiment of the present application, the axis of the oil supply hole 216 has a certain inclination angle with the engine axis. For example, this inclination angle can be set to 30° to 60°.

[0026] The end of the axial portion 21 near the vertical portion 22 is constructed with an oil collection groove 218 using the end surface and cylindrical surface to collect the lubricating oil that seeps out from between the radial positioning surface 214 and the shaft mating surface. An oil-slinging hole 217 is provided from the oil collection groove 218 to the outer surface of the axial portion 21. The oil-slinging hole 217 can guide the lubricating oil collected in the oil collection groove 218 to the bearing cavity. Figure 3 As shown, in the preferred embodiment of the present application, the axis of the oil-slinging hole 217 points to the bearing roller, and there is an angle α between it and the engine axis. This angle can allow the lubricating oil to be sprayed from the side to the bearing roller, thereby improving the lubrication and cooling efficiency of the lubricating oil.

[0027] The radial end of the vertical portion 22 is provided with an air sealing grate ring 221 and an oil sealing grate ring 222. The air sealing grate ring 221 uses the grate teeth on it and the corresponding structure to form a small gap to achieve separation of the sealing air and the air paths of the remaining chambers; the oil sealing grate ring 222 uses the grate teeth on it and the corresponding structure to form a small gap to achieve separation of the bearing cavity lubricating oil and the sealing air cavity. In some embodiments of the present application, there is a certain height difference in radial height between the air sealing grate ring 221 and the oil sealing grate ring 222. In the present application, the end of the oil sealing grate ring 222 is provided with an oil throwing tooth 223, and the oil throwing tooth 223 is bent outward. Taking advantage of the high-speed rotation of the rotor during operation, the oil throwing tooth 223 can throw the lubricating oil splashed onto the surface of the sealing ring back to the bearing cavity, thereby reducing the consumption of lubricating oil.

[0028] In the present application, the axial rear side surface of the vertical portion 22 constitutes an axial positioning surface 224 , which is the axial mounting surface of the part on the rotating shaft and is used to determine the mounting position of the bearing roller on the rotating shaft.

[0029] An axial countersunk screw hole 225 is provided at the axial positioning surface 224 to minimize the effect of the screw head on the lubricating oil in the bearing cavity during rotor rotation. Furthermore, a sealing groove 226 is provided on the axial positioning surface 224. This groove is used to mount a sealing ring, which effectively seals the lubricating oil in the oil reservoir 218 and reduces unexpected leakage. In some embodiments of the present application, the sealing ring is an O-ring, illustratively made of materials such as nitrile rubber, fluororubber, or silicone rubber.

[0030] The integrated sealing function bearing inner ring support ring provided by the application integrates the gas sealing ring 221 and the oil sealing ring 222 into the bearing inner ring support ring, can effectively utilize the limited installation space, and does not need to use bolt connection to complete the use requirement of mounting the sealing ring to the rotating shaft. The technical solution of the application simplifies the number of parts, can reduce the manufacturing and use and maintenance cost of the whole machine, and meanwhile, the integrated design technical solution of the application can effectively reduce the rotor weight, and brings a positive influence on the weight reduction of the engine.

[0031] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A bearing inner ring support ring (20) with integrated sealing function, characterized in that: It comprises a transverse portion (21) and a vertical portion (22), wherein the transverse portion (21) and the vertical portion (22) are an integrated structure; The outer surface of the axial portion (21) is provided with a bearing inner ring mating surface (211), and the side of the bearing inner ring mating surface (211) away from the radial portion (22) is provided with an external thread (212) for axially pressing the bearing inner ring. The inner surface of the axial portion (21) is provided with an oil collecting ring (groove 215) at a position corresponding to the bearing inner ring mating surface (211), and the two sides of the oil collecting ring groove (215) are respectively provided with an oil retaining wall (213) and a radial positioning surface (214). The axial portion (21) is provided with at least one oil supply hole (216) within the range of the oil collecting ring groove (215), and the oil supply hole (216) is connected to the collecting ring. The lubricating oil collected by the oil collecting ring groove (215) and the bearing inner ring mating surface (211) is supplied to the bearing inner ring that is in contact with the bearing inner ring mating surface (211) through the oil supply hole (216); the end of the axial portion (21) close to the vertical portion (22) is constructed with an oil accumulation groove (218) by using the end face and the cylindrical surface to collect the lubricating oil seeping from between the radial positioning surface (214) and the rotating shaft mating surface; an oil throwing hole (217) is provided from the oil accumulation groove (218) to the outer surface of the axial portion (21); the lubricating oil gathered in the oil accumulation groove (218) is guided to the bearing cavity through the oil throwing hole (217); An air sealing grate ring (221) and an oil sealing grate ring (222) are provided at the radial end of the vertical portion (22); an oil-slinging tooth (223) is provided at the end of the oil sealing grate ring (222); an axial rear side surface of the vertical portion (22) constitutes an axial positioning surface (224); an axial countersunk screw hole (225) is provided on the axial positioning surface (224); and a sealing groove (226) is provided on the axial positioning surface (224) for installing a sealing ring.

2. The bearing inner ring support ring with integrated sealing function according to claim 1, characterized in that: The axial dimension of the bearing inner ring matching surface (211) is the same as or similar to the width of the bearing inner ring.

3. The bearing inner ring support ring with integrated sealing function according to claim 1, characterized in that: The axial length of the oil collecting ring groove (215) is greater than the axial length of the bearing inner ring matching surface (211).

4. The bearing inner ring support ring with integrated sealing function as claimed in claim 3, characterized in that: The oil retaining wall (213) is arranged on a side of the oil collecting ring groove (215) away from the radial portion (22), the radial positioning surface (214) is arranged on a side of the oil collecting ring groove (215) close to the radial portion (22), and the axial length of the radial positioning surface (214) at least covers the axial position of the center of gravity of the bearing inner ring support ring (20).

5. The bearing inner ring support ring with integrated sealing function as claimed in claim 1, characterized in that: The axis of the oil supply hole (216) has a predetermined angle with the engine axis.

6. The bearing inner ring support ring with integrated sealing function according to claim 1, characterized in that: There is a height difference between the air sealing grate ring (221) and the oil sealing grate ring (222) in radial height.

7. The bearing inner ring support ring with integrated sealing function as claimed in claim 1, characterized in that: The oil flinger teeth 223 are bent outward.

8. The bearing inner ring support ring with integrated sealing function as claimed in claim 1, characterized in that: The sealing ring is an O-shaped sealing ring.

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