Multi-pipeline combined floating seal structure of double-layer outer casing

Abstract

The present invention provides a multi-pipeline combined floating seal structure for a double-layer outer casing, comprising: an outer-layer outer casing, including a cylindrical casing and a support plate; an inner-layer outer casing fixedly connected to the support plate; a combined floating seal bushing lapped with the cylindrical casing, the combined floating seal bushing being capable of moving relative to the cylindrical casing, the combined floating seal bushing being provided with a plurality of pipeline mounting holes arranged at intervals, and a pipeline being correspondingly inserted through each pipeline mounting hole; and a cover plate fixedly connected to the outer-layer outer casing and crimped to the upper end of the combined floating seal bushing. By installing multiple pipelines through the combined floating seal bushing, the purposes of reducing aerodynamic loss and structural weight can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine aero-engines, and particularly to a multi-pipeline combined floating seal structure for a double-layer outer casing. Background Art

[0002] Some engines adopt a double-layer outer casing design. The fuel supply and return pipelines, gas supply, and ventilation of the engine need to pass through the double-layer outer casing and be connected to the inner casing. The space between the double-layer outer casings is the engine flow path. Aerodynamic profile struts are used to wrap the pipelines to reduce aerodynamic losses. The struts should not be designed too large to facilitate reducing aerodynamic losses and structural weight. When there are many pipelines, if the traditional form of separate individual floating seals is used, it will occupy a large amount of space, forcing the struts to be designed too large, increasing aerodynamic losses and structural weight. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a multi-pipeline combined floating seal structure for a double-layer outer casing to achieve the purpose of reducing aerodynamic losses and structural weight.

[0004] The specific technical solution of the present invention is: a multi-pipeline combined floating seal structure for a double-layer outer casing, including: an outer outer casing, including a cylindrical casing and struts; an inner outer casing fixedly connected to the struts; a combined floating seal bushing lapped with the cylindrical casing, the combined floating seal bushing being able to move relative to the cylindrical casing, the combined floating seal bushing being provided with a plurality of spaced pipeline mounting holes, and a pipeline is correspondingly passed through each pipeline mounting hole; a cover plate fixedly connected to the outer outer casing and crimped to the upper end of the combined floating seal bushing.

[0005] Further, the cylindrical casing is provided with a cylindrical casing mounting seat, and the combined floating seal bushing is provided with a radially outward flange, and the radially outward flange is lapped with the cylindrical casing mounting seat.

[0006] Further, there are three pipeline mounting holes, and the three pipeline mounting holes are located on the same straight line.

[0007] Further, the pipelines passed through the pipeline mounting holes on both sides are both provided with semi-circular bosses, and the semi-circular bosses can be snap-connected and limited to the lower end of the combined floating seal bushing.

[0008] Further, a seal mounting groove is provided in each pipeline mounting hole, and a seal rubber ring is provided in the seal mounting groove.

[0009] Further, the strut is provided with a strut mounting seat, the inner outer casing is provided with an inner outer casing mounting seat, the strut mounting seat and the inner outer casing mounting seat are in corresponding positions and are connected by bolts.

[0010] Furthermore, a sealing gasket is provided between the strut mounting seat and the inner outer casing mounting seat.

[0011] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification at least include: by installing multiple pipelines through a combined floating seal bushing, the purposes of reducing aerodynamic losses and reducing structural weight can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 is Figure 1 a cross-sectional view taken along the A-A direction in

[0015] Reference numerals in the drawings: 1, outer outer casing; 2, inner outer casing; 3, cover plate; 4, combined floating seal bushing; 5, sealing rubber ring; 6, bolt; 7, first pipeline; 8, second pipeline; 9, third pipeline; 10, sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The embodiments of the present application will be described in detail below with reference to the drawings.

[0017] The following illustrates the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0018] Such as Figure 1 and Figure 2As shown in the figure, an embodiment of the present invention provides a multi-pipeline combined floating seal structure for a double-layer outer casing, including an outer outer casing 1, an inner outer casing 2, a cover plate 3, and a combined floating seal bushing 4. The outer outer casing 1 includes a cylindrical casing and a support plate; the inner outer casing 2 is fixedly connected to the support plate; the combined floating seal bushing 4 overlaps with the cylindrical casing, and the combined floating seal bushing 4 can move relative to the cylindrical casing. The combined floating seal bushing 4 is provided with a plurality of pipeline mounting holes arranged at intervals, and a pipeline is correspondingly penetrated in each pipeline mounting hole; the cover plate 3 is fixedly connected to the outer outer casing 1 and is crimped with the upper end of the combined floating seal bushing 4.

[0019] By installing multiple pipelines through the combined floating seal bushing 4, the purpose of reducing aerodynamic loss and reducing structural weight can be achieved.

[0020] The cylindrical casing is provided with a cylindrical casing mounting seat, and the combined floating seal bushing 4 is provided with a radially outward flange, and the radially outward flange overlaps with the cylindrical casing mounting seat. The cover plate 3 is covered above the combined floating seal bushing 4 and is fixedly connected to the outer outer casing 1. A floating space is formed between the cover plate 3 and the outer outer casing 1, and the radially outward flange is arranged in the floating space and can slide, so as to achieve the purpose of floating connection.

[0021] There are three pipeline mounting holes, and the three pipeline mounting holes are located on the same straight line. The three pipelines in this embodiment are the first pipeline 7, the second pipeline 8, and the third pipeline 9 in sequence. The second pipeline 8 is penetrated in the middle position, and the first pipeline 7 and the third pipeline 9 are symmetrically arranged on both sides of the second pipeline 8 respectively, and both ends of the first pipeline 7 and the third pipeline 9 are bent away from the second pipeline 8, so as to achieve the purpose of avoiding interference.

[0022] The pipelines penetrated in the pipeline mounting holes located on both sides are both provided with semi-circular bosses, and the semi-circular bosses can be clamped and limited with the lower end of the combined floating seal bushing 4. In the embodiment of the present invention, semi-circular bosses are provided on the first pipeline 7 and the third pipeline 9. The semi-circular bosses are circular ring structures protruding radially outward, and are used to be clamped with the lower end of the combined floating seal bushing 4, so as to limit the combined floating seal bushing 4 in the vertical direction.

[0023] Of course, the above semi-circular bosses can also be of other structures or installed at other positions. Any structure that can axially limit the combined floating seal bushing 4 should be within the protection scope of this application.

[0024] Preferably, a seal mounting groove is provided in each pipeline mounting hole, and a seal rubber ring 5 is arranged in the seal mounting groove. By providing the seal rubber ring 5, the sealing of the pipeline can be realized, so as to ensure the sealing performance of the overall device.

[0025] The strut is provided with a strut mounting seat, and the inner annular outer casing 2 is provided with an inner annular outer casing mounting seat. The strut mounting seat and the inner annular outer casing mounting seat are in corresponding positions and are connected by bolts 6. A sealing gasket 10 is arranged between the strut mounting seat and the inner annular outer casing mounting seat.

[0026] When the engine is operating, the deformation of the inner casing and the outer casing is inconsistent. The inner casing drives the first pipeline 7, the second pipeline 8, and the third pipeline 9 to generate relative movement with the outer casing. The combined floating seal bushing 4 slides in the groove between the mounting seat of the outer annular outer casing 1 and the cover plate 3, realizing the combined floating seal of the first pipeline 7, the second pipeline 8, and the third pipeline 9.

[0027] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A multi-pipeline combined floating seal structure for a double-layer outer casing, characterized in that, Comprising: An outer bypass casing (1), including a cylindrical casing and struts; An inner bypass casing (2), fixedly connected to the struts; A combined floating seal bushing (4), lapped with the cylindrical casing, the combined floating seal bushing (4) being capable of moving relative to the cylindrical casing, the combined floating seal bushing (4) being provided with a plurality of spaced pipeline mounting holes, and each pipeline mounting hole corresponding to a pipeline passing through; A cover plate (3), fixedly connected to the outer bypass casing (1) and crimped to the upper end of the combined floating seal bushing (4); The cylindrical casing is provided with a cylindrical casing mounting seat, the combined floating seal bushing (4) is provided with a radially outward flange, and the radially outward flange is lapped with the cylindrical casing mounting seat; There are three pipeline mounting holes, and the three pipeline mounting holes are located on the same straight line; The pipelines passing through the pipeline mounting holes on both sides are provided with semi-circular bosses, and the semi-circular bosses can be snap-fitted and limited to the lower end of the combined floating seal bushing (4); Each pipeline mounting hole is provided with a seal mounting groove, and a seal rubber ring (5) is arranged in the seal mounting groove.

2. The multi-pipeline combined floating seal structure of the double-layer outer casing according to claim 1, wherein The strut is provided with a strut mounting seat, the inner bypass casing (2) is provided with an inner bypass casing mounting seat, the strut mounting seat and the inner bypass casing mounting seat are in corresponding positions and are connected by bolts (6).

3. The multi-pipeline combined floating seal structure of the double-layer outer casing according to claim 2, characterized in that, A sealing gasket (10) is arranged between the strut mounting seat and the inner bypass casing mounting seat.

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