A new integrated high-strength bearing cavity oil supply heat insulation structure

Abstract

The application belongs to the technical field of aero-engines, and particularly relates to a novel integrated high-strength bearing cavity oil supply heat insulation structure. The oil supply pipe assembly and the skin heat insulation assembly structure are integrated through an integrated rear cover assembly structure, so that the assembly of a rotor and a stator can be completed under visual conditions. Meanwhile, the rear cover assembly can be conveniently disassembled through the design of a top screw hole structure, and the structure of a sealing device is prevented from being damaged, so that the assembly and disassembly reliability of the bearing cavity oil supply heat insulation structure is greatly improved. Through the inner skin structure with a reinforcing rib, the skin heat insulation assembly structure is optimized. Under high pressure difference, the stress of an outer skin and the deformation amount of the skin heat insulation assembly are reduced, the strength and rigidity of the bearing cavity heat insulation structure are improved, and the working reliability of the bearing cavity is improved.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to a novel integrated high-strength bearing cavity oil supply and heat insulation structure. Background Technology

[0002] High-temperature and high-speed operating conditions place high demands on the working environment of engine bearings. Therefore, lubricating oil is needed to remove the heat generated by the high-speed rotation and friction of the bearings. Simultaneously, to maintain a low-temperature environment within the bearing cavity, a heat insulation structure is required to prevent the external high-temperature environment from affecting the bearing's operating environment. Currently, existing bearing cavity oil supply heat insulation structures have the following drawbacks: 1. The assembly sequence of the existing bearing cavity oil supply heat insulation structure involves first assembling the oil supply pipe assembly and the rear cover assembly onto the casing, then fixing the oil supply pipe assembly to the rear cover assembly with bolts, and finally blindly installing the entire assembly onto the rotor. The assembly process cannot use a guiding structure, which may damage the sealing device and affect engine safety; 2. In the existing bearing cavity oil supply heat insulation structure, the skin heat insulation assembly is only filled with a heat insulation layer, resulting in low structural strength. Under certain operating conditions, the pressure difference between the inner and outer sides of the skin heat insulation assembly is large, which may cause deformation or damage to the skin heat insulation assembly. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a novel integrated high-strength bearing cavity oil supply and heat insulation structure, comprising:

[0004] A rotor; a casing connected to the rotor; an oil supply pipe mounted on the casing; a disc-shaped skin heat insulation assembly covering the oil supply pipe; wherein the casing has an oil inlet on its radially outer side, characterized in that...

[0005] An oil supply seat is installed on the oil supply port. One end of the oil supply seat is fixed on the oil supply port, and the other end is a pipe that is inserted and connected to the oil supply seat adapter.

[0006] The oil supply adapter has a cylindrical opening that fits over the oil supply pipe and a sleeve that connects to the oil supply pipe. The oil supply adapter allows the oil from the oil supply to flow into the oil supply pipe.

[0007] The oil supply adapter also has a protrusion that mates with the skin insulation assembly, and the skin insulation assembly has a recess that accommodates the protrusion.

[0008] During installation, one end of the oil supply pipe is fixedly installed on the radial outside of the skin heat insulation assembly via the oil supply adapter, and the other end is fixed on the radial inside of the skin heat insulation assembly; after inserting the cylinder of the oil supply adapter into the pipe opening of the oil supply seat, the skin heat insulation assembly is fixedly installed on the casing.

[0009] Preferably, the skin insulation assembly includes an inner skin, an outer skin, and an insulation layer filled between the inner skin and the outer skin, wherein the inner skin has radial reinforcing ribs.

[0010] Preferably, the oil supply seat has a cylindrical structure with a limiting flange on its outer cylindrical surface. One end of the oil supply seat is inserted into the oil supply port and limited by the limiting flange; the other end of the oil supply seat is connected to the pipe port of the oil supply seat adapter.

[0011] Preferably, one end of the oil supply seat is sealed by a fourth rubber ring, and the port of the oil supply seat is sealed by a fifth rubber ring.

[0012] Preferably, the protrusion is a cylindrical protrusion and the depression is a cylindrical depression.

[0013] Preferably, the oil supply pipe is fixedly connected to the locking plate by the third screw, and the oil supply adapter is connected to the ear plate by the fourth screw.

[0014] Preferably, the skin insulation component has multiple set screw holes, and the skin insulation component is installed with the casing through the set screw holes, which enables quick assembly and disassembly of the skin insulation component and the casing.

[0015] The advantages of this application include: 1. By integrating the oil supply pipe assembly and the skin heat insulation assembly structure through the integrated rear cover assembly structure, the assembly of the rotor and stator can be completed under visual conditions. At the same time, by designing the top screw hole structure, the disassembly of the rear cover assembly can be completed very easily, avoiding damage to the sealing device and other structures, and greatly improving the reliability of the assembly and disassembly of the bearing cavity oil supply heat insulation structure.

[0016] 2. By using an inner skin structure with reinforcing ribs, the structure of the skin insulation component is optimized. Under high pressure differential conditions, the stress on the outer skin and the deformation of the skin insulation component are reduced, thereby improving the strength and stiffness of the bearing cavity insulation structure and enhancing the working reliability of the bearing cavity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a novel integrated high-strength bearing cavity oil supply and heat insulation structure according to a preferred embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of a novel integrated high-strength bearing cavity oil supply and heat insulation structure according to a preferred embodiment of this application. Detailed Implementation

[0019] 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. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-2 As shown, it consists of mounting base 1, first rubber ring 2, first screw 3, bushing 4, sealing device 5, oil collection ring 6, second rubber ring 7, third rubber ring 8, rotor 9, sealing device 10, bearing 11, casing 12, second screw 13, sixth rubber ring 14, inner skin with reinforcing ribs 15 (including set screw hole 31), heat insulation layer 16, outer skin 17, rivet 18, double locking plate 19, nozzle 20, oil supply pipe 21, fourth rubber ring 22, oil supply adapter 23, flat conical semi-hollow rivet 24, third screw 25, locking plate 26, fifth rubber ring 27, oil supply seat 28, fourth screw 29, and ear plate 30.

[0021] Specifically: the skin insulation assembly consists of an inner skin 15 (including set screw holes 31) with reinforcing ribs and an outer skin 17. The insulation layer 16 is cut according to the shape of the reinforcing ribs and filled between the inner skin 15 and the outer skin 17. The inner skin 15 and the outer skin 17 are connected and fixed radially outward by flat conical semi-hollow rivets 24 and radially inward by rivets 18. The skin insulation assembly is connected and fixed to the bushing 4 and the mounting base 1 by the first screw 3 and locked with a double locking plate 19. The first rubber ring 2 is located between the skin insulation assembly and the bushing and plays a sealing role. The oil supply pipe assembly consists of a nozzle 20, an oil supply pipe 21, and an oil supply... The assembly consists of a base adapter 23; the oil supply pipe assembly and the skin heat insulation assembly are connected by the third screw 25 and the fourth screw 29, and locked with locking plates 26 and lugs 30. The skin heat insulation assembly and the oil supply pipe assembly together form an integrated rear cover assembly; the oil supply base and the housing 12 are connected by bolts, and the fourth rubber ring 22 is located between the oil supply base and the housing 12 for sealing; the integrated rear cover assembly and the housing 12 are fixed with bolts 13, and the sixth rubber ring 14 is located between the housing 12 and the rear cover assembly for sealing; two fifth rubber rings 27 are located between the rear cover assembly and the oil supply base assembly for sealing.

[0022] The rotor consists of a shaft 9 and an oil collection ring 6. The second rubber ring 7 and the third rubber ring 8 are located between the shaft 9 and the oil collection ring 6, and serve as a seal. The stator consists of a casing 12, an integrated rear cover assembly, and an oil supply seat assembly. The bearing 11 is located between the rotor and the stator and serves as a support. The sealing device 10 is located between the shaft 9 and the casing 12 and serves as a seal. The sealing device 5 is located between the rotor and the stator and serves as a seal. A low-temperature, low-pressure lubricating oil chamber A is formed between the rotor and the stator, and a high-temperature, high-pressure gas chamber B is located outside the stator.

[0023] Implementation example:

[0024] Lubricating oil enters the low-pressure lubricating oil chamber A through the oil supply pipe assembly in the casing 12, oil supply seat assembly, and integrated rear cover assembly, and then enters the bearing via the rotor, serving a lubrication and cooling function. The heat insulation layer 16 in the skin heat insulation assembly provides heat insulation, preventing heat from the high-temperature, high-pressure gas chamber B from entering the low-temperature, low-pressure lubricating oil chamber A, thus providing a good working environment for the bearing. With the integrated high-strength bearing cavity oil supply and heat insulation structure, the assembly sequence can be adjusted to first assemble the rotor with the casing 12, then assemble the fourth rubber ring 22, oil supply seat 28, and fifth rubber ring 27 onto the casing 12. Afterwards, using the guide structure, the integrated rear cover assembly is assembled onto the casing 12 under visual conditions, completing the assembly of the rotor and stator, avoiding damage to the sealing device 5 and other structures. During disassembly, the integrated rear cover assembly can be directly disassembled from the casing 12 using the set screw hole 31, significantly improving the reliability of the assembly and disassembly of the integrated high-strength bearing cavity oil supply and heat insulation structure.

[0025] Meanwhile, through simulation calculations, by adopting an integrated high-strength bearing cavity oil supply and heat insulation structure and optimizing the skin heat insulation component, and by using an inner skin 15 with reinforcing ribs, under the same boundary conditions, the stress of the outer skin 17 is reduced by 20.3%, the axial deformation of the skin heat insulation component is reduced by 70.2%, the strength and stiffness of the bearing cavity oil supply and heat insulation structure are significantly improved, and the working reliability of the bearing cavity is enhanced.

[0026] 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. An integrated high-strength bearing cavity oil supply and heat insulation structure, comprising: Rotor (9), and casing (12) connected to rotor (9); An oil supply pipe (21) is mounted on the casing (12), and a disc-shaped heat insulation assembly covers the oil supply pipe (21); wherein the casing (12) has an oil inlet on its radially outer side, characterized in that, An oil supply seat (28) is installed on the oil supply port. One end of the oil supply seat (28) is fixed on the oil supply port, and the other end is a pipe opening that is inserted and connected to the oil supply seat adapter (23). The oil supply adapter (23) has a cylindrical opening that fits over the pipe opening of the oil supply seat (28) and a sleeve that connects to the oil supply pipe (21). The oil supply adapter (23) allows the oil from the oil supply seat (28) to flow into the oil supply pipe (21). The oil supply adapter (23) also has a protrusion that is fitted to the skin insulation assembly, and the skin insulation assembly has a recess that accommodates the protrusion. During installation, one end of the oil supply pipe (21) is fixedly installed on the radial outside of the skin heat insulation assembly via the oil supply seat adapter (23), and the other end is fixed on the radial inside of the skin heat insulation assembly; after inserting the cylinder of the oil supply seat adapter (23) into the pipe opening of the oil supply seat (28), the skin heat insulation assembly is fixedly installed on the casing (12).

2. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 1, characterized in that, The skin insulation assembly includes an inner skin (15), an outer skin (17), and an insulation layer (16) filled between the inner skin (15) and the outer skin (17), wherein the inner skin (15) has radial reinforcing ribs.

3. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 1, characterized in that, The oil supply seat (28) is a cylindrical structure with a limiting flange on its outer cylindrical surface. One end of the oil supply seat (28) is inserted into the oil supply port and limited by the limiting flange. The other end of the oil supply seat (28) is connected to the pipe port of the oil supply seat adapter (23).

4. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 3, characterized in that, One end of the oil supply seat (28) is sealed by the fourth rubber ring (22), and the port of the oil supply seat (28) is sealed by the fifth rubber ring (27).

5. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 1, characterized in that, The protrusion is a cylindrical protrusion, and the depression is a cylindrical depression.

6. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 1, characterized in that, The oil supply pipe (21) is fixedly connected to the locking plate (26) by the third screw (25), and the oil supply adapter (23) is connected to the ear plate (30) by the fourth screw (29).

7. The integrated high-strength bearing cavity oil supply and heat insulation structure as described in claim 1, characterized in that, The skin insulation assembly has multiple set screw holes (31), and the skin insulation assembly is installed with the casing (12) through the set screw holes (31), which enables quick assembly and disassembly of the skin insulation assembly and the casing (12).

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