High-temperature air pipeline compensation structure penetrating three-layer machine case

Abstract

The application provides a high-temperature air pipeline compensation structure penetrating three-layer machine cases, which is installed on a main machine case, the main machine case comprises an inner layer machine case, a middle layer machine case and an outer layer machine case, and the high-temperature air pipeline compensation structure penetrating the three-layer machine cases comprises: an inner guide pipe fixedly connected with the inner layer machine case; an outer guide pipe fixedly connected with the outer layer machine case; a lower floating ring abutting against the middle layer machine case, one end of the inner guide pipe being inserted into the lower floating ring and being capable of moving axially relative to the lower floating ring; an upper floating ring abutting against the lower floating ring, one end of the outer guide pipe being inserted into the upper floating ring and being capable of moving axially relative to the upper floating ring; and the upper floating ring being capable of moving radially relative to the lower floating ring. The application can automatically compensate the uncoordinated radial and axial deformation occurring between the three-layer machine cases, and a larger compensation amount can be achieved; the structure comprises a small number of parts, the parts have simple structures, and the structure has high reliability.

Description

Technical Field

[0001] This invention relates to the field of aero-engine structural technology, specifically to a high-temperature air pipeline compensation structure that passes through a three-layer casing. Background Technology

[0002] A certain engine employs a multi-bypass design to broaden the range of bypass ratio variations and reduce fuel consumption. To ensure safe and reliable engine operation, air must be bleed from the engine core through three casing layers via air piping. Due to the engine's high flight speed, the bleed air temperature exceeds 600°C, surpassing the operating temperature range of traditional sealing elements such as rubber or graphite seals. Furthermore, due to differences in ambient temperature and load conditions among the casing layers, varying deformations occur along the engine's axial and radial directions. To ensure deformation coordination between casing layers, the high-temperature air piping passing through the three casing layers needs to possess deformation compensation capabilities along both the engine's axial and radial directions. Summary of the Invention

[0003] In view of this, the present invention provides a high-temperature air pipeline compensation structure that passes through a three-layer casing to achieve compensation for uncoordinated axial and radial deformation of the three-layer casing.

[0004] This invention provides the following technical solution: a high-temperature air pipeline compensation structure passing through a three-layer casing, installed on the main casing. The main casing includes an inner casing, a middle casing, and an outer casing. The high-temperature air pipeline compensation structure passing through the three-layer casing includes: an inner conduit fixedly connected to the inner casing; an outer conduit fixedly connected to the outer casing; a lower floating ring abutting against the middle casing, with one end of the inner conduit inserted into the lower floating ring and capable of axial movement relative to the lower floating ring; an upper floating ring abutting against the lower floating ring, with one end of the outer conduit inserted into the upper floating ring and capable of axial movement relative to the upper floating ring; and the upper floating ring capable of radial movement relative to the lower floating ring.

[0005] Furthermore, the high-temperature air pipeline compensation structure passing through the three-layer casing also includes a pressure plate, which is fixedly connected to the middle layer casing and has a gap with the upper floating ring.

[0006] Furthermore, the inner conduit includes: an inner conduit flange structure, which is fixedly connected to the inner casing; and an inner conduit circular tube structure, which is integrally formed with the inner conduit flange structure, with the end of the inner conduit circular tube structure away from the inner conduit flange structure being inserted into and engaged with the lower floating ring.

[0007] Furthermore, the outer conduit includes: an outer conduit flange structure, which is fixedly connected to the outer casing; and an outer conduit circular tube structure, which is integrally formed with the outer conduit flange structure, with the end of the outer conduit circular tube structure away from the outer conduit flange structure being inserted and mated with the upper floating ring.

[0008] Furthermore, the lower floating ring includes: a lower floating ring flange structure that abuts against the middle casing; and a lower floating ring sleeve structure that is integrally formed with the lower floating ring flange structure, wherein the lower floating ring sleeve structure is inserted into and fitted with the inner conduit circular tube structure.

[0009] Furthermore, the upper floating ring includes: an upper floating ring flange structure that abuts against the lower floating ring flange structure; and an upper floating ring sleeve structure that is integrally formed with the upper floating ring flange structure, wherein the upper floating ring sleeve structure is inserted into and fitted with the outer conduit circular tube structure.

[0010] Furthermore, a countersunk hole for the lower floating ring is provided at one end of the middle section; and a countersunk hole for the upper floating ring is provided at one end of the middle section.

[0011] Furthermore, a lower floating ring guide angle is provided at the other end of the middle part of the lower floating ring; an upper floating ring guide angle is provided at the other end of the middle part of the upper floating ring.

[0012] Furthermore, the inner catheter, outer catheter, lower floating ring, and upper floating ring are all made of the same material.

[0013] Compared with the prior art, the beneficial effects that the above-mentioned at least one technical solution adopted by the present invention can achieve include at least the following: the present invention can automatically compensate for the uncoordinated radial and axial deformations that occur between the three-layer casing, and can achieve a large compensation amount; the structure contains fewer parts, the parts have simple structural shapes, and the structure has high reliability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a high-temperature air pipeline compensation structure that passes through a three-layer casing according to the present invention;

[0016] Figure 2 This is a schematic diagram of the lower floating ring structure of a high-temperature air pipeline compensation structure passing through a three-layer casing according to the present invention;

[0017] Figure 3 This is a schematic diagram of the floating ring structure of a high-temperature air pipeline compensation structure passing through a three-layer casing according to the present invention.

[0018] Figure 4 This is a schematic diagram illustrating the radial and axial compensation of a high-temperature air pipeline compensation structure passing through a three-layer casing according to the present invention.

[0019] The reference numerals in the figure are as follows: 1. Inner casing; 2. Middle casing; 3. Outer casing; 4. Piping assembly; 41. Inner conduit; 411. Flange structure; 412. Circular tube structure; 42. Outer conduit; 421. Flange structure; 422. Circular tube structure; 43. Lower floating ring; 431. Lower floating ring flange structure; 432. Sleeve structure; 433. Guide angle; 434. Lower floating ring countersunk hole; 44. Upper floating ring; 441. Upper floating ring flange structure; 442. Sleeve structure; 443. Guide angle; 444. Upper floating ring countersunk hole; 45. Pressure plate. Detailed Implementation

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0021] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] like Figures 1 to 4 As shown, this embodiment of the invention provides a high-temperature air pipeline compensation structure with three casings, including an inner casing 1, a middle casing 2, an outer casing 3, and a pipeline assembly 4. The middle casing 2 and the outer casing 3 are sequentially and coaxially fitted onto the outside of the inner casing 1. The pipeline assembly 4 includes an inner conduit 41, an outer conduit 42, a lower floating ring 43, an upper floating ring 44, and a pressure plate 45; the inner conduit 41 includes a flange structure 411 and a circular tube structure 412, and the inner conduit 41 is fixedly connected to the outside of the inner casing 1 through the flange structure 411; the outer conduit 42 includes a flange structure 421 and a circular tube structure 422, the end of the circular tube structure 422 of the outer conduit 42 passes through the outer casing 3, and the outer conduit 42 is fixedly connected to the outside of the outer casing 3 through the flange structure 421.

[0023] according to Figure 2As shown, the lower floating ring 43 includes a lower floating ring flange structure 431 and a sleeve structure 432; the sleeve structure 432 of the lower floating ring 43 passes through the middle casing 2 and is fitted onto the round tube structure 412 of the inner guide tube 41, the sleeve structure 432 and the round tube structure 412; the lower floating ring flange structure 431 of the lower floating ring 43 is installed on the outside of the middle casing 2, the lower floating ring 43 and the inner guide tube 41 adopt a clearance fit, the tolerance at the fit can be H7 / h6, they can slide along the axial direction, and the lower floating ring 43 can slide laterally along the outside of the middle casing 2.

[0024] according to Figure 3 As shown, the upper floating ring 44 includes an upper floating ring flange structure 441 and a sleeve structure 442. The sleeve structure 442 of the upper floating ring 44 is fitted onto the circular tube structure 422 of the outer guide tube 42. The upper floating ring flange structure 441 of the upper floating ring 44 is in contact with the lower floating ring flange structure 431 of the lower floating ring 43. The upper floating ring 44 and the outer guide tube 42 are fitted with a clearance fit. The tolerance at the fit can be H7 / h6. They can slide relative to each other along the axial direction. The upper floating ring 44 and the lower floating ring 43 can slide relative to each other. The pressure plate 45 is fixed to the outside of the middle casing 2 by bolts. The pressure plate 45 limits the lower floating ring 43 and the upper floating ring 44. There is a gap between the pressure plate 45 and the upper floating ring 44, so that the lower floating ring 43 and the upper floating ring 44 can only slide laterally in the cavity formed between the pressure plate 45 and the middle casing 2.

[0025] The inner conduit 41 and the outer conduit 42 have the same diameter. The outer diameter of the end of the circular tube structure 412 of the inner conduit 41 is larger than the diameter of the rest of the circular tube structure 412. The outer diameter of the end of the circular tube structure 422 of the outer conduit 42 is larger than the diameter of the rest of the circular tube structure 422.

[0026] The lower floating ring 43 and the upper floating ring 44 are respectively provided with a countersunk hole 434 for the lower floating ring and a countersunk hole 444 for the upper floating ring. The inner diameter of the countersunk hole 434 for the lower floating ring and the countersunk hole 444 for the upper floating ring is determined according to the maximum relative lateral misalignment between the lower floating ring 43 and the upper floating ring 44 and the diameter of the lower floating ring 43, to ensure that the effective diameter of the pipeline assembly 4 is not less than the diameter of the inner conduit 41.

[0027] The inner guide tube 41, outer guide tube 42, lower floating ring 43, upper floating ring 44, pressure plate 45, and middle casing 2 are made of the same high-temperature resistant material to ensure that the linear expansion coefficient of each part is the same.

[0028] After the inner conduit 41 is installed, the top of the round tube structure 412 is lower than the inner side of the middle casing 2, so that the inner conduit can be properly assembled when the middle casing 2 is installed after the inner casing 1 is installed.

[0029] The lower floating ring 43 and the upper floating ring 44 are respectively provided with guide angles 433 and 443 on the inner side of the inner guide tube 41 and the outer guide tube 42, which facilitates the installation of parts.

[0030] according to Figure 4 As shown, the compensation principle of a high-temperature air pipeline compensation structure with a three-layer casing is explained: The inner conduit 41 and the lower floating ring 43 are fitted with a clearance fit, allowing them to slide relative to each other axially along the mating surface; the outer conduit 42 and the upper floating ring 44 are fitted with a clearance fit, allowing them to slide relative to each other axially along the mating surface; the lower floating ring 43 and the upper floating ring 44 can slide relative to each other along the contact surface, and both the lower floating ring 43 and the upper floating ring 44 can slide within the cavity formed by the pressure plate 45 and the middle casing 2. When uncoordinated axial and radial deformation occurs between the inner casing 1, the middle casing 2, and the outer casing 3, the inner conduit 41 and the outer conduit 42 slide along the axial directions of the lower floating ring 43 and the upper floating ring 44, respectively. Simultaneously, the lower floating ring 43 and the upper floating ring 44 can slide within the cavity formed by the pressure plate 45 and the middle casing 2, thereby achieving deformation compensation between the casings. The inner diameter of the countersunk hole 434 of the lower floating ring 43 can be the same as the inner diameter of the countersunk hole 444 of the upper floating ring 44. The size of the inner diameter must meet the requirement that when the lower floating ring 43 and the upper floating ring 44 have extreme misalignment, the effective flow channel diameter of the pipeline assembly 4 is not less than the inner guide 41 diameter, so as to ensure that no throttling phenomenon occurs in the pipeline assembly 4 during engine operation.

[0031] Meanwhile, since the linear expansion coefficients of the materials of the inner conduit 41, outer conduit 42, lower floating ring 43, upper floating ring 44, pressure plate 45, and middle casing 2 are the same, when thermal expansion occurs under the action of high temperature air, the gap between each part remains unchanged, so that the parts will not jam or the gap will increase, which can effectively avoid the failure of the structure's compensation function or the increase of air leakage.

[0032] 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 high-temperature air pipeline compensation structure for passing through three-layer engine casings, which is installed on a main engine casing, the main engine casing comprising an inner-layer engine casing (1), a middle-layer engine casing (2), and an outer-layer engine casing (3), characterized in that, The high-temperature air pipeline compensation structure penetrating through the three-layer casing comprises: an inner conduit (41) fixedly connected with the inner-layer casing (1); an outer conduit (42) fixedly connected with the outer-layer casing (3); a lower floating ring (43) abutting against the middle-layer casing (2), one end of the inner conduit (41) being inserted into the lower floating ring (43) and being axially movable relative to the lower floating ring (43); an upper floating ring (44) abutting against the lower floating ring (43), one end of the outer conduit (42) being inserted into the upper floating ring (44) and being axially movable relative to the upper floating ring (44); the upper floating ring (44) being radially movable relative to the lower floating ring (43); the inner conduit (41) comprises: an inner conduit flange structure (411) fixedly connected with the inner-layer casing (1); and an inner conduit circular tube structure (412) integrally arranged with the inner conduit flange structure (411), one end of the inner conduit circular tube structure (412) away from the inner conduit flange structure (411) being inserted into the lower floating ring (43) in a fitting manner; the outer conduit (42) comprises: an outer conduit flange structure (421) fixedly connected with the outer-layer casing (3); and an outer conduit circular tube structure (422) integrally arranged with the outer conduit flange structure (421), one end of the outer conduit circular tube structure (422) away from the outer conduit flange structure (421) being inserted into the upper floating ring (44) in a fitting manner; the lower floating ring (43) comprises: a lower floating ring flange structure (431) abutting against the middle-layer casing (2); and a lower floating ring sleeve structure (432) integrally arranged with the lower floating ring flange structure (431), the lower floating ring sleeve structure (432) being inserted into the inner conduit circular tube structure (412) in a fitting manner; the upper floating ring (44) comprises: an upper floating ring flange structure (441) abutting against the lower floating ring flange structure (431); and an upper floating ring sleeve structure (442) integrally arranged with the upper floating ring flange structure (441), the upper floating ring sleeve structure (442) being inserted into the outer conduit circular tube structure (422) in a fitting manner; one end of the middle part of the lower floating ring (43) is provided with a lower floating ring counterbore (434); one end of the middle part of the upper floating ring (44) is provided with an upper floating ring counterbore (444); the inner diameters of the lower floating ring counterbore (434) and the upper floating ring counterbore (444) are determined according to the maximum relative transverse displacement amount between the lower floating ring (43) and the upper floating ring (44) and the size of the lower floating ring (43) passageway, so as to ensure that the effective passageway of the pipeline assembly (4) is not less than the passageway of the inner conduit (41).

2. The high temperature air ducting compensation structure of claim 1, wherein, The high-temperature air pipeline compensation structure penetrating through the three-layer casing further comprises a pressing plate (45) fixedly connected with the middle-layer casing (2) and arranged in a gap manner with the upper floating ring (44).

3. The high-temperature air pipeline compensation structure penetrating through the three-layer casing according to claim 1, wherein: the other end of the middle part of the lower floating ring (43) is provided with a lower floating ring guide angle (433); the other end of the middle part of the upper floating ring (44) is provided with an upper floating ring guide angle (443).

4. The high temperature air ducting compensation structure of claim 1, wherein, The inner conduit (41), the outer conduit (42), the lower floating ring (43) and the upper floating ring (44) are all made of the same material.

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