A bearing inner ring support ring with integrated sealing function
By integrating a sealing function into the bearing inner ring support ring, the problems of limited installation space and high cost in existing technologies are solved, achieving efficient sealing and lubrication in aero engines, reducing manufacturing and maintenance costs, and decreasing lubricating oil consumption and rotor weight.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AECC SHENYANG ENGINE RES INST
- Filing Date
- 2025-08-15
- Publication Date
- 2026-06-30
AI Technical Summary
The existing sealing structure of aero-engine pivot bearings has high manufacturing and maintenance costs due to limited installation space and the lack of separate screw connections.
Design a bearing inner ring support ring with integrated sealing function. The sealing grate ring and the oil sealing grate ring are integrated into one-piece structure. The sealing function is achieved by using components such as oil collection ring groove, oil supply hole, oil throwing hole and sealing groove, reducing the need for bolt connection.
It effectively utilizes limited installation space, reduces manufacturing and maintenance costs, simplifies the number of parts, reduces lubricating oil consumption, reduces rotor weight, and improves lubrication and cooling efficiency.
Smart Images
Figure CN120759864B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of aero-engine technology, and specifically relates to a bearing inner ring support ring with integrated sealing function. Background Technology
[0002] When an aero-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, which is an important supporting component for the rotor. At the same time, sealing rings are generally provided at both ends of the bearing cavity. Sealing air introduced by the air system is used to seal the bearing cavity and prevent lubricating oil from leaking out.
[0003] like Figure 1 As shown, in the prior art, the inner ring 11 of the pivot bearing 10 is directly mounted on the shaft 12 and limited by the locking ring 13. The shaft 12 and the bearing cavity sealing grate ring 14 are connected together by screws. This structural solution is suitable for rotor structures with limited installation space and no conditions for separate screw connection, but the manufacturing and maintenance costs are high. Summary of the Invention
[0004] The purpose of this application is to provide a bearing inner ring support ring with integrated sealing function to solve or alleviate at least one of the problems in the prior art.
[0005] The technical solution of this application is: a bearing inner ring support ring with integrated sealing function, including a horizontal part and a vertical part, wherein the horizontal part and the vertical part are an integral structure;
[0006] The axial portion has a bearing inner ring mating surface on its outer surface. The bearing inner ring mating surface, away from the radial portion, has an external thread for axially pressing the bearing inner ring. An oil collecting ring is provided on the inner surface of the axial portion corresponding to the bearing inner ring mating surface. An oil baffle and a radial positioning surface are provided on both sides of the oil collecting ring groove. The axial portion has at least one oil supply hole within the oil collecting ring groove, connecting the oil collecting ring groove and the bearing inner ring mating surface. The lubricating oil collected through 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. An oil accumulation groove is constructed at the end of the axial portion near the vertical portion using an end face and a cylindrical surface to collect lubricating oil seeping from between the radial positioning surface and the shaft mating surface. An oil throwing hole is provided from the oil accumulation groove toward the outer surface of the axial portion, guiding the lubricating oil collected in the oil accumulation groove to the bearing cavity through the oil throwing hole.
[0007] The radial end of the vertical part is provided with a sealing grate ring and an oil sealing grate ring. The end of the oil sealing grate ring is provided with oil throwing teeth. The axial rear side of the vertical part forms 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 this application, the axial dimension of the inner ring mating surface of the bearing is the same as or similar to the width of the inner ring of the bearing.
[0009] In a preferred embodiment of this application, the axial length of the oil collecting ring groove is greater than the axial length of the bearing inner ring mating surface.
[0010] In a preferred embodiment of this application, the oil baffle is disposed on the side of the oil collecting ring groove away from the radial portion, the radial positioning surface is disposed 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 position of the center of gravity of the bearing inner ring support ring in the axial direction.
[0011] In a preferred embodiment of this application, the axis of the oil supply hole has a predetermined angle with the engine axis.
[0012] In a preferred embodiment of this application, the air-sealing grate ring and the oil-sealing grate ring have a height difference in radial height.
[0013] In a preferred embodiment of this application, the oil-slinging tooth 223 bends outward.
[0014] In a preferred embodiment of this application, the sealing ring is an O-ring.
[0015] The bearing inner ring support ring with integrated sealing function provided in this application integrates the gas 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 meet the usage requirements of installing the sealing ring onto the rotating shaft without the need for bolt connection. Attached Figure Description
[0016] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.
[0017] Figure 1 This is a schematic diagram of the inner ring and sealing ring structure of a certain type of aero-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 according to this application.
[0019] Figure 3 This is a schematic diagram of the oil slinger angle in this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.
[0021] This application provides a bearing inner ring support ring with integrated sealing function, which can realize the functional requirements of arranging roller bearing inner ring support ring and bearing cavity grate sealing ring in a narrow space, thereby reducing the manufacturing and maintenance costs of the whole machine.
[0022] like Figure 2 As shown, the bearing inner ring support ring 20 with integrated sealing function provided in this application includes an axial portion 21 and a radial portion 22, which are integral structures.
[0023] The outer surface of the axial portion 21 in this 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 installed on the external thread 212. In some embodiments of this application, the axial dimension of the bearing inner ring mating surface 211 is usually 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, so that the nut installed on the external thread 212 can abut against 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 near the engine axis) corresponding to the bearing inner ring mating surface 211. An oil baffle wall 213 and a radial positioning surface 214 are respectively provided on both sides of the oil collecting ring groove 215. The protrusion height of the oil baffle wall 213 is not higher than the height of the radial positioning surface 214. In this application, the oil baffle wall 213 collects the lubricating oil injected by the lubricating oil supply device into the oil collecting ring groove 215, which can significantly improve 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, thus enabling the radial positioning surface 214 to act as a centering surface for the bearing inner ring support ring 20. Due to the presence of the radial portion 22, the overall center of gravity of the bearing inner ring support ring 20 will inevitably be biased towards the radial portion 22. Therefore, in this application, the oil baffle 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. The axial length of the radial positioning surface 214 at least covers the position of the center of gravity of the bearing inner ring support ring 20 in the axial direction, so that the radial positioning surface 214 can more stably support the bearing inner ring support ring 20.
[0025] The axial portion 21 has at least one oil supply hole 216 within the range of the oil collecting ring groove 215. The oil supply hole 216 connects the oil collecting ring groove 215 and the bearing inner ring mating surface 211. The lubricating oil collected through 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, to provide lubrication and cooling for the bearing rollers. In a preferred embodiment of this application, the axis of the oil supply hole 216 has a certain angle with the engine axis. For example, this angle can be set to 30° to 60°.
[0026] An oil collection groove 218 is constructed at the end of the axial portion 21 near the vertical portion 22 using an end face and a cylindrical surface to collect lubricating oil seeping from between the radial positioning surface 214 and the shaft mating surface. An oil throwing hole 217 is provided from this oil collection groove 218 to the outer surface of the axial portion 21, through which the lubricating oil collected in the oil collection groove 218 can be guided to the bearing cavity. Figure 3 As shown, in a preferred embodiment of this application, the axis of the oil slinger 217 points to the bearing roller, and there is an angle α between it and the engine axis. This angle allows 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 section 22 is provided with a sealing grate ring 221 and an oil sealing grate ring 222. The sealing grate ring 221 uses its grates to form a small gap with the corresponding structure, thereby separating the sealing air intake from the air passage of the other chambers. The oil sealing grate ring 222 uses its grates to form a small gap with the corresponding structure, thereby separating the lubricating oil in the bearing cavity from the sealing air cavity. In some embodiments of this application, the sealing grate ring 221 and the oil sealing grate ring 222 have a certain height difference in radial height. In this application, the end of the oil sealing grate ring 222 is provided with an oil-throwing tooth 223. The oil-throwing tooth 223 bends 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 into the bearing cavity, reducing the consumption of lubricating oil.
[0028] In this application, the axial rear side of the vertical part 22 forms an axial positioning surface 224, which is an 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 temperature increase effect of the screw head stirring the lubricating oil in the bearing cavity during rotor rotation. Simultaneously, a sealing groove 226 is designed on the axial positioning surface 224 for installing a sealing ring, ensuring a good seal for the lubricating oil in the oil accumulation groove 218 and reducing unexpected oil leakage. In some embodiments of this application, the sealing ring is an O-ring; for example, the sealing ring can be made of materials such as nitrile rubber, fluororubber, or silicone rubber.
[0030] The bearing inner ring support ring with integrated sealing function provided in this application integrates the gas sealing grate ring 221 and the oil sealing grate ring 222 onto the bearing inner ring support ring. This effectively utilizes limited installation space and eliminates the need for bolt connections to install the sealing ring onto the shaft. The technical solution of this application simplifies the number of parts, reducing the overall manufacturing and maintenance costs. Furthermore, the integrated design of this application effectively reduces rotor weight, positively impacting engine weight reduction.
[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A bearing inner ring support ring (20) with integrated sealing function, characterized in that, It includes a horizontal part and a vertical part, which are integral structures. The horizontal part constitutes the axial part (21) of the bearing inner ring support ring, and the vertical part constitutes the radial part (22) of the bearing inner ring support ring. The axial portion (21) has a bearing inner ring mating surface (211) on its outer surface. The bearing inner ring mating surface (211) away from the radial portion (22) has an external thread (212) for axial clamping of the bearing inner ring. The inner surface of the axial portion (21) corresponding to the bearing inner ring mating surface (211) has an oil collecting ring groove (215). Oil baffles (213) and radial positioning surfaces (214) are respectively provided on both sides of the oil collecting ring groove (215). The axial portion (21) has at least one oil supply hole (216) within the oil collecting ring groove (215). The oil supply hole (216) connects to... Through the oil collecting ring groove (215) and the bearing inner ring mating surface (211), the lubricating oil collected by the oil collecting ring groove (215) 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 part (21) near the vertical part is provided with an oil collecting groove (218) constructed by the end face and the cylindrical surface to collect the lubricating oil that seeps out from between the radial positioning surface (214) and the rotating shaft mating surface. An oil throwing hole (217) is provided from the oil collecting groove (218) to the outer surface of the axial part (21), and the lubricating oil gathered in the oil collecting groove (218) is guided to the bearing cavity through the oil throwing hole (217). The radial end of the vertical part is provided with a sealing grate ring (221) and an oil sealing grate ring (222). The end of the oil sealing grate ring (222) is provided with an oil-throwing tooth (223). The axial rear side of the vertical part forms 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 as described in claim 1, characterized in that, The axial dimension of the inner ring mating surface (211) of the bearing is the same as or similar to the width of the inner ring of the bearing.
3. The bearing inner ring support ring with integrated sealing function as described in 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 mating surface (211).
4. The bearing inner ring support ring with integrated sealing function as described in claim 3, characterized in that, The oil baffle (213) is located on the side of the oil collecting ring groove (215) away from the radial part (22), and the radial positioning surface (214) is located on the side of the oil collecting ring groove (215) close to the radial part (22), and the axial length of the radial positioning surface (214) at least covers the position of the center of gravity of the bearing inner ring support ring (20) in the axial direction.
5. The bearing inner ring support ring with integrated sealing function as described in claim 1, characterized in that, The axis of the oil supply hole (216) is at a predetermined angle to the engine axis.
6. The bearing inner ring support ring with integrated sealing function as described in claim 1, characterized in that, The sealing grate ring (221) and the oil sealing grate ring (222) have a height difference in radial height.
7. The bearing inner ring support ring with integrated sealing function as described in claim 1, characterized in that, The oil-spinning tooth (223) bends outward.
8. The bearing inner ring support ring with integrated sealing function as described in claim 1, characterized in that, The sealing ring is an O-ring.