A guide vane locking structure with adjustable exhaust area

Abstract

The application provides a guide vane locking structure with adjustable exhaust area, comprising: a left vane, a right vane and a gasket; wherein the left vane comprises a left vane blade body and a left vane upper edge plate and a left vane lower edge plate located at the upper and lower ends of the blade body, and the left vane upper edge plate and the left vane lower edge plate are respectively provided with an upper edge plate boss and a lower edge plate boss; the right vane comprises a right vane blade body and a right vane upper edge plate and a right vane lower edge plate located at the upper and lower ends of the blade body, and the right vane upper edge plate and the right vane lower edge plate are respectively provided with an upper edge plate hook and a lower edge plate hook matched with the upper edge plate boss and the lower edge plate boss; the left vane and the right vane are connected through the upper edge plate hook, the lower edge plate hook, the upper edge plate boss and the lower edge plate boss; and the gasket with different thicknesses is installed between the upper edge plate hook and the upper edge plate boss and / or the lower edge plate hook and the lower edge plate boss, so that the relative position of the left vane and the right vane is changed, and then the window exhaust area between the left vane and the right vane is adjusted.

Description

Technical Field

[0001] This application belongs to the field of aero-engine blade design technology, and specifically relates to a guide vane locking structure with adjustable exhaust area. Background Technology

[0002] Turbine guide vanes are crucial components of aircraft engines or gas turbines, used to alter the angle and velocity of the main combustion gas flow, converting the gas's thermal energy into kinetic energy. For example... Figure 1 As shown, in order to improve the installation process of turbine guide vanes and prevent problems such as misalignment and wear of the turbine guide vane crowns, turbine guide vanes are connected into double blades by welding two blades, left and right. The minimum cross-sectional area of ​​the gas passage between the double blades is called the exhaust area of ​​the turbine guide vane, which has a significant impact on the overall performance of the aero-engine.

[0003] However, during engine development and improvement, it is often necessary to adjust the exhaust area of ​​the turbine guide vanes. Since the turbine guide vanes themselves are integrally cast or welded structures, the welded connection means the vane's spatial orientation is relatively fixed and cannot be adjusted. After casting, the exhaust area of ​​the guide vane is a fixed value. Therefore, guide vanes with different exhaust areas need to be cast, and during assembly, they must be selected and matched according to the exhaust area value of each vane to meet the overall engine's exhaust area requirements. This often necessitates the manufacture of multiple sets of vane molds, significantly increasing production costs. Inconsistent technical conditions of the outer blades also increase the difficulty of blade design, manufacturing, assembly, and management, reducing the efficiency of aero-engine development. Summary of the Invention

[0004] The purpose of this application is to provide a guide vane locking structure with adjustable exhaust area to solve or mitigate at least one of the problems in the prior art.

[0005] The technical solution of this application is: a guide vane locking structure with adjustable exhaust area, comprising: a left vane, a right vane, and a gasket;

[0006] The left blade includes a left blade body and a left blade upper edge plate and a left blade lower edge plate located at the upper and lower ends of the left blade body. The left blade upper edge plate and the left blade lower edge plate are respectively provided with an upper edge plate boss and a lower edge plate boss.

[0007] The right blade includes a right blade body and a right blade upper edge plate and a right blade lower edge plate located at the upper and lower ends of the right blade body. The right blade upper edge plate and the right blade lower edge plate are respectively provided with upper edge plate hooks and lower edge plate hooks that match the upper edge plate bosses and lower edge plate bosses.

[0008] The left blade and the right blade are connected to the upper edge plate hook and the lower edge plate boss through the upper edge plate hook and the lower edge plate hook, respectively. Gaskets of different thicknesses are installed between the upper edge plate hook and the upper edge plate boss and / or the lower edge plate hook and the lower edge plate boss, thereby changing the relative position of the left blade and the right blade and thus adjusting the window exhaust area between the left blade and the right blade.

[0009] In a preferred embodiment of this application, each of the upper edge plate boss, lower edge plate boss, upper edge plate hook, and lower edge plate hook is provided in pairs.

[0010] In a preferred embodiment of this application, the upper edge plate boss and the lower edge plate boss are respectively arranged along the crown edge of the upper edge plate of the left blade and the lower edge plate of the left blade.

[0011] In a preferred embodiment of this application, the upper edge plate boss and the lower edge plate boss have the same cross-sectional shape.

[0012] In a preferred embodiment of this application, the cross-sectional shape of the upper edge plate boss and the lower edge plate boss is rectangular or rhomboid.

[0013] In a preferred embodiment of this application, the upper edge plate boss, the lower edge plate boss, the upper edge plate hook, and the lower edge plate hook are fixed to the corresponding upper edge plate and lower edge plate of the left blade and the right blade, respectively, by welding.

[0014] In a preferred embodiment of this application, the thickness T of the gasket is ≤1mm, and the distance L between the two hooks is not less than 2 / 3 of the side length of the edge plate.

[0015] Compared with the welding fixing method in the prior art, the guide vane locking structure provided in this application can set a specific exhaust area value for the vane assembly according to the usage requirements during the vane assembly processing, avoiding the traditional method of using multiple sets of molds, significantly reducing production costs and shortening the development cycle. 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 a double-bladed assembly using welding in the prior art.

[0018] Figure 2 This is a schematic diagram of the left blade in this application.

[0019] Figure 3 This is a schematic diagram of the right blade in this application.

[0020] Figure 4This is a schematic diagram of the locked state of the left and right blades in this application.

[0021] Figure 5 This is a schematic diagram showing the dimensions of the hooks and bosses on the upper edge plates of the left and right blades in one embodiment of this application.

[0022] Figure 6 This is a schematic diagram showing the change in exhaust area of ​​the left and right blades in this application.

[0023] Figure label:

[0024] 10-Left blade

[0025] 11-Left leaf blade

[0026] 12-Left blade upper edge plate

[0027] 13-Left blade lower edge plate

[0028] 14- Upper edge plate boss

[0029] 15-Lower edge plate boss

[0030] 20-Right blade

[0031] 11-Right leaf blade

[0032] 12-Right blade upper edge plate

[0033] 13-Right blade lower edge plate

[0034] 14-Upper edge plate hook

[0035] 15-Lower edge plate hook

[0036] 30-Gasket Detailed Implementation

[0037] 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.

[0038] To address the problem that existing turbine guide vane (or guide vane) connection structures are difficult to adjust the exhaust area of ​​the turbine guide vane, this application proposes a guide vane locking structure with adjustable exhaust area. This structure can adjust the orientation of the turbine guide vane within a certain range, thereby adjusting the exhaust area of ​​the turbine guide vane. At the same time, this structure can achieve a reliable connection between the turbine guide vanes.

[0039] like Figures 2 to 4 As shown, the adjustable exhaust area guide vane locking structure provided in the application includes a left vane 10, a right vane 20, and a gasket 30.

[0040] The left blade 10 includes a left blade body 11 and a left blade upper edge plate 12 and a left blade lower edge plate 13 located at the upper and lower ends of the left blade body 11. The left blade upper edge plate 12 and the left blade lower edge plate 13 are respectively provided with an upper edge plate boss 14 and a lower edge plate boss 15.

[0041] The right blade 20 includes a right blade body 21 and a right blade upper edge plate 22 and a right blade lower edge plate 23 located at the upper and lower ends of the right blade body 21. The right blade upper edge plate 12 and the right blade lower edge plate 13 are respectively provided with upper edge plate hooks 24 and lower edge plate hooks 25 that match the upper edge plate boss 14 and the lower edge plate boss 15.

[0042] The left and right blades are connected by hooks and bosses. Different thickness shims 30 are installed between the hooks and bosses to change the relative position of the left and right blades, thereby adjusting the window area between the left and right blades.

[0043] In some embodiments of this application, the upper edge plate boss 14, the lower edge plate boss 15, the upper edge plate hook 24, and the lower edge plate hook 25 can be provided as two or more, preferably two. The upper edge plate boss 14 and the lower edge plate boss 15 are provided along the edges of the upper and lower edge plates of the left blade. The cross-sectional shapes of the upper edge plate boss 14 and the lower edge plate boss 15 can be the same or different, preferably the same. For example, in some embodiments of this application, the shape of the boss is rectangular or rhomboid. When the cross-sectional shapes of the upper edge plate boss 14 and the lower edge plate boss 15 are different, the upper edge plate hook 24 and the lower edge plate hook 25 can be adapted accordingly.

[0044] In this application, the upper edge plate boss 14, the lower edge plate boss 15, the upper edge plate hook 24, and the lower edge plate hook 25 can be fixed to the upper and lower edge plates of the left or right blade respectively by welding.

[0045] like Figure 5 As shown, the distance between the two hooks on the same flange is L. When hook A is not fitted with a washer and hook B is fitted with a washer of thickness T, the left blade has a rotation angle α relative to the right blade.

[0046] α = arctan(T / L).

[0047] Changes in blade angle will cause corresponding changes in the exhaust area of ​​the twin blades, such as... Figure 6 As shown, the dashed line represents the changes in the blade body after the blade rotates. It can be seen that after adding the gasket 30, the width of the gas passage between the double blades increases, which in turn increases the exhaust area of ​​the double blades.

[0048] It should be noted that the increase in exhaust area of ​​the double-bladed system depends on the blade angle and blade profile. To balance the angle and structural strength, this application limits the gasket thickness T to ≤ 1 mm and the distance L between the two hooks to not less than 2 / 3 of the side length of the flange.

[0049] Compared with the welding fixing method in the prior art, the guide vane locking structure provided in this application can set a specific exhaust area value for the vane assembly according to the usage requirements during the vane assembly processing, avoiding the traditional method of using multiple sets of molds, significantly reducing production costs and shortening the development cycle.

[0050] 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 guide vane locking structure with adjustable exhaust area, characterized in that, include: Left blade, right blade, and gasket; The left blade includes a left blade body and a left blade upper edge plate and a left blade lower edge plate located at the upper and lower ends of the left blade body. The left blade upper edge plate and the left blade lower edge plate are respectively provided with an upper edge plate boss and a lower edge plate boss. The right blade includes a right blade body and a right blade upper edge plate and a right blade lower edge plate located at the upper and lower ends of the right blade body. The right blade upper edge plate and the right blade lower edge plate are respectively provided with upper edge plate hooks and lower edge plate hooks that match the upper edge plate bosses and lower edge plate bosses. The left blade and the right blade are connected to the upper edge plate hook and the lower edge plate boss through the upper edge plate hook and the lower edge plate hook, respectively. Gaskets of different thicknesses are installed between the upper edge plate hook and the upper edge plate boss and / or the lower edge plate hook and the lower edge plate boss, thereby changing the relative position of the left blade and the right blade and thus adjusting the window exhaust area between the left blade and the right blade.

2. The guide vane locking structure with adjustable exhaust area as described in claim 1, characterized in that, The upper edge plate boss, lower edge plate boss, upper edge plate hook, and lower edge plate hook are all provided in pairs.

3. The guide vane locking structure with adjustable exhaust area as described in claim 2, characterized in that, The upper edge plate boss and the lower edge plate boss are respectively set along the crown edge of the upper edge plate of the left blade and the lower edge plate of the left blade.

4. The guide vane locking structure with adjustable exhaust area as described in claim 2 or 3, characterized in that, The upper edge plate boss and the lower edge plate boss have the same cross-sectional shape.

5. The guide vane locking structure with adjustable exhaust area as described in claim 4, characterized in that, The cross-sectional shape of the upper edge plate boss and the lower edge plate boss is rectangular or rhomboid.

6. The guide vane locking structure with adjustable exhaust area as described in claim 1, characterized in that, The upper edge plate boss, lower edge plate boss, upper edge plate hook, and lower edge plate hook are fixed to the corresponding upper edge plate and lower edge plate of the left blade and right blade respectively by welding.

7. The guide vane locking structure with adjustable exhaust area as described in claim 2, characterized in that, The thickness T of the gasket is ≤1mm, and the distance L between the two hooks is not less than 2 / 3 of the side length of the edge plate.

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