A low vortex stator assembly guide vane ring assembly process

Abstract

A method for assembling a whole ring of guide vanes of a low-vortex stator assembly belongs to the technical field of aero-engine assembly. The method for assembling a whole ring of guide vanes of a low-vortex stator assembly includes: S1, assembling the whole ring of guide vanes piece by piece on a positioning tool, and fixing the whole ring of guide vanes through a fixed structure on the positioning tool; S2, placing a transfer tool above the whole ring of guide vanes, and fixing the whole ring of guide vanes to the transfer tool; S3, loosening the fixed structure on the positioning tool to separate the positioning tool from the whole ring of guide vanes; S4, moving the whole ring of guide vanes to the casing through the transfer tool; S5, loosening the fixed connection between the whole ring of guide vanes and the transfer tool, removing the transfer tool, and installing the whole ring of guide vanes on the casing. The method for assembling a whole ring of guide vanes of a low-vortex stator assembly directly installs the assembled whole ring of guide vanes of various levels directly on the casing through a whole ring assembly method, which can save assembly time and improve assembly efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a process for assembling a guide vane ring of a low-vortex stator assembly. Background Art

[0002] At present, the guide vanes of the low-pressure turbine stator assembly of aircraft engines are installed piece by piece and layer by layer. This assembly method can only be performed by one or two operators around the casing piece by piece and layer by layer, which is slow and inefficient. Moreover, this assembly method is highly dependent on the casing and takes a long time to wait for the casing.

[0003] With the development of the aero-engine industry, the requirements for production capacity and production efficiency are getting higher and higher. In mass production, the existing low-vortex stator assembly guide vane assembly method is limited by the uniqueness of the casing, and the assembly efficiency is low. In addition, the existing low-vortex stator assembly guide vane assembly method requires the use of a positioning block structure, which increases the types of parts and increases the difficulty of assembly and management.

[0004] Therefore, there is an urgent need for a low-vortex stator assembly method that does not rely on the casing to avoid waiting for the casing when assembling piece by piece, so as to improve assembly efficiency. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a low-vortex stator assembly guide vane full-ring assembly process method, which directly installs the assembled full-ring guide vanes of each level directly on the casing through a full-ring assembly method, which can save assembly time and improve assembly efficiency.

[0006] In order to achieve the above object, the technical solution of the present invention is:

[0007] A low-vortex stator assembly guide vane ring assembly process method comprises the following steps:

[0008] S1. Assemble the guide vanes of the whole ring piece by piece on the positioning fixture, and fix the guide vanes of the whole ring by the fixing structure on the positioning fixture;

[0009] S2. Place the transfer tooling above the full ring guide vane, and fix the full ring guide vane to the transfer tooling;

[0010] S3, loosen the fixing structure on the positioning fixture to separate the positioning fixture from the full ring guide vane;

[0011] S4. Move the complete ring of guide vanes to the casing by using a transfer tool;

[0012] S5. Loosen the fixed connection between the full ring guide vane and the transfer tooling, remove the transfer tooling, and install the full ring guide vane on the casing.

[0013] Furthermore, the positioning tooling includes a circular chassis and a plurality of the fixing structures arranged along the circumference of the circular chassis, the circular chassis is provided with a positioning ring 1 and a positioning ring 2 for positioning the guide vanes, the fixing structure includes a guide bolt arranged on the circular chassis and a slider connected to the guide bolt, the guide bolt drives the slider to move, the slider extends to fix the angular position of the guide vane, and the slider retracts to loosen the guide vane.

[0014] Furthermore, the top stop of the positioning ring one contacts the front mounting edge of the outer edge of the guide vane to radially position the guide vane, and the top of the positioning ring two contacts the inner ring honeycomb of the guide vane to axially position the guide vane, and both cooperate with the fixing structure to fix the guide vane.

[0015] Furthermore, the guide bolt is arranged on a guide seat above the circular chassis, and a slide groove is arranged on the upper part of the guide seat for movement of the slider, and the slider contacts the groove of the rear mounting edge of the outer edge of the guide vane.

[0016] Furthermore, the transfer tooling is a disc structure, and a plurality of cross beams are provided on the outer edge of the disc structure, and the cross beams are connected to the guide vanes by nylon tie ties.

[0017] Furthermore, the transfer tooling is in contact with the outer edge plate and the inner edge plate of the guide vane.

[0018] Furthermore, a rubber pad is provided at the position where the disc structure contacts the guide vane, which can increase friction and fix the guide vane, and at the same time prevent the transfer tooling from directly contacting the guide vane and causing scratches.

[0019] Beneficial effects of the present invention:

[0020] (1) When assembling the low-pressure turbine stator, the present invention utilizes a full-ring assembly method, which is not affected by the uniqueness of the casing. The full ring assembly of each stage of the guide vanes is completed in advance, and then the assembled full ring of each stage of the guide vanes is assembled on the casing step by step, which can avoid waiting for the casing and improve assembly efficiency.

[0021] (2) The present invention adopts a new method of whole-ring assembly to gradually eliminate the positioning block structure, reduce parts, and facilitate assembly and parts management.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the coordination of the positioning tool and the transfer tool provided in an embodiment of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the cooperation between the positioning tool and the transfer tool provided in an embodiment of the present invention;

[0025] Figure 3 It is a partial top view schematic diagram of the cooperation between the positioning tool and the transfer tool provided in an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional schematic diagram of a guide vane provided by an embodiment of the present invention being assembled on a positioning tool;

[0027] Figure 5 is a partial top view schematic diagram of a guide vane provided by an embodiment of the present invention being assembled on a positioning tool;

[0028] Figure 6 is a schematic diagram of the cooperation between the transfer tooling and the guide vane provided in an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of a rubber pad of a transfer tool provided in an embodiment of the present invention.

[0030] The reference numerals in the drawings of the specification include:

[0031] 1-positioning tooling, 2-transfer tooling, 3-slider, 4-guide bolt, 5-crossbeam, 6-rubber pad, 7-circular chassis, 8-positioning ring one, 9-positioning ring two, 10-outer edge front mounting edge, 11-inner ring honeycomb, 12-guide seat, 13-outer edge rear mounting edge, 14-outer edge plate, 15-inner edge plate, 16-guide vane. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0034] In order to solve the problems existing in the prior art, such as Figures 1 to 7 As shown, the present invention provides a method for assembling a complete ring of guide vanes 16 of a low-vortex stator assembly, comprising the following steps:

[0035] S1, assembling the complete ring of guide vanes 16 piece by piece on the positioning fixture 1, and fixing the complete ring of guide vanes 16 by the fixing structure on the positioning fixture 1;

[0036] S2, placing the transfer tool 2 above the full ring guide vane 16, and fixedly connecting the full ring guide vane 16 to the transfer tool 2;

[0037] S3, loosening the fixing structure on the positioning fixture 1 to separate the positioning fixture 1 from the full ring guide vane 16;

[0038] S4, moving the complete ring of guide vanes 16 to the casing by using the transfer tool 2;

[0039] S5, loosen the fixed connection between the full ring guide vane 16 and the transfer fixture 2, remove the transfer fixture 2, and install the full ring guide vane 16 on the casing.

[0040] In this embodiment, the guide vanes 16 of each stage are assembled on the positioning fixture 1. Since the structure of each stage of the guide vanes 16 is different, the structures of the positioning fixture 1 and the transfer fixture 2 corresponding to each stage of the guide vanes 16 are also different. The number of fixed structures on the positioning fixture 1 of each stage of the guide vanes 16 and the number of crossbeams 5 on the transfer fixture 2 must be equal to the number of the guide vanes 16 of each stage.

[0041] like Figures 1 to 3 As shown, the positioning tool 1 includes a circular chassis 7 and a plurality of fixed structures arranged along the circumference of the circular chassis 7. The circular chassis 7 is provided with a positioning ring 1 8 and a positioning ring 2 9 for positioning the guide vane 16. The fixed structure includes a guide bolt 4 arranged on the circular chassis 7 and a slider 3 connected to the guide bolt 4. The guide bolt 4 drives the slider 3 to move. The slider 3 extends to fix the angular position of the guide vane 16, and the slider 3 retracts to loosen the guide vane 16.

[0042] like Figure 4 As shown, the top stop of the positioning ring 1 8 contacts the outer edge front mounting edge 10 of the guide vane 16 to radially position the guide vane 16, and the top of the positioning ring 2 9 contacts the inner ring honeycomb 11 of the guide vane 16 to axially position the guide vane. At the same time, both cooperate with the fixing structure to fix the guide vane 16.

[0043] like Figure 4 and Figure 5 As shown, the guide bolt 4 is arranged on the guide seat 12 above the circular chassis 7. A slide groove is arranged on the upper part of the guide seat 12 for the movement of the slider 3. The slider 3 contacts the groove of the outer edge rear mounting edge 13 of the guide vane 16. Specifically, the slider 3 extends into the groove of the outer edge rear mounting edge 13 of the guide vane 16 to realize angular positioning and radial positioning of the guide vane 16.

[0044] like Figure 6As shown, the transfer fixture 2 is a disc structure, and a plurality of crossbeams 5 are arranged on the outer edge of the disc structure. The crossbeams 5 are connected to the guide vanes 16 by nylon cable ties, and the transfer fixture 2 is in contact with the outer edge plate 14 and the inner edge plate 15 of the guide vanes 16. In actual use, the number of crossbeams 5 and guide vanes 16 is equal, and the blades are fixed to the crossbeams 5 and then moved to meet the requirements of fixing and moving the guide vanes 16. After the whole ring of guide vanes 16 is assembled, the transfer fixture 2 is placed above the guide vanes 16, and the guide vanes 16 are fixed to the crossbeams 5 of the disc structure with nylon cable ties to ensure the radial and angular positioning of the blades, and at the same time, the blades are in a horizontal state, and then the transfer fixture 2 with the guide vanes 16 is moved and assembled to the casing as a whole to achieve the final assembly. In order to facilitate the installation of nylon tie, the cross beam 5 can be designed as an open cross beam 5. At the same time, in order to prevent the cross beam 5 from interfering with other structures in the casing (such as outer ring block, retaining ring, etc.) when the whole ring guide vane 16 is assembled into the casing, the radial dimension of the cross beam 5 cannot be too longer than the outer edge plate 14 of the guide vane 16.

[0045] like Figure 7 As shown, a rubber pad 6 is provided at the position where the disc structure contacts the guide vane 16, which can increase friction and fix the guide vane 16, while preventing the transfer tool 2 from directly contacting the guide vane 16 and causing scratches.

[0046] In the present invention, when the guide vanes 16 of the low-vortex stator assembly are assembled in a complete ring, two types of tooling are required for each stage of the guide vanes 16:

[0047] (1) a positioning tool 1, used for positioning and assembling the guide vane 16 outside the casing, specifically comprising assembling the guide vane 16 on the positioning tool 1, and fixing the assembled guide vane 16 by means of a slider 3;

[0048] (2) Transfer the tooling 2, fix the guide vane 16, keep it from moving in the circumferential direction, and move the entire ring to install it on the casing.

[0049] The working principle of the low-vortex stator assembly guide vane 16 complete ring assembly process method of the present invention is as follows:

[0050] (1) To realize the complete ring assembly of the guide vane 16, the blade is first assembled on the positioning fixture 1 according to the specified radial and angular positions, while ensuring that the blade is in a horizontal state as a whole, that is, the state of the blade on the casing after the final assembly;

[0051] (2) After the guide vane 16 is positioned and installed on the positioning tool 1, it needs to be fixed with the help of the transfer tool 2, and then moved as a whole and assembled on the casing. Considering the subsequent assembly of the rotor and stator components, the assembly method is to assemble step by step from bottom to top, that is, when assembling the guide vane 16, its lower part is close to the rotor component, and there is no space for placing the tool. Therefore, the present invention uses the upper space to place the tool;

[0052] (3) A slidable slider 3 structure is provided on the positioning fixture 1, that is, after the guide vane 16 is positioned by the slider 3, the slider 3 can be retracted to avoid friction between the slider 3 and the guide vane 16, thereby facilitating the full ring movement of the guide vane 16.

[0053] Examples

[0054] The whole ring assembly technology is illustrated by taking a certain stage of guide vane 16 as an example.

[0055] In order to realize the whole ring assembly of the guide vane 16, the guide vanes 16 of a certain level are first assembled piece by piece on the positioning fixture 1 structure according to the specified radial and angular positions, and the guide vanes 16 are ensured to be in a horizontal state as a whole. At the same time, in order to ensure that the guide vanes 16 do not interfere with the slider 3 during the overall movement of the guide vanes 16, and the parts do not move due to friction and collision during the movement process, which affects the subsequent alignment and assembly, the slider 3 needs to be withdrawn after the guide vanes 16 are angularly positioned and fixed.

[0056] After the guide vane 16 is positioned and installed on the positioning fixture 1 , the blades are not fixed to each other at this time. In order to move the blade as a whole to the casing, it is necessary to fix it with the help of the transfer fixture 2 .

[0057] Since the rotor-stator assembly is assembled step by step from bottom to top, when assembling a certain level of guide vane 16, the rotor blades have been assembled below it, and the space below the guide vane 16 cannot be used, and the axial clamping inner ring fixing method of the guide vane 16 cannot be adopted. The full-ring assembly scheme of this embodiment not only realizes the assembly of the low-vortex stator assembly, but also meets the subsequent application of the rotor-stator assembly, thereby improving efficiency.

[0058] The whole-ring assembly process of the guide vanes 16 of the low-vortex stator assembly of the aircraft engine in this embodiment can shorten the waiting time for the casing when assembling the guide vanes 16, greatly improve the assembly efficiency, and shorten the assembly cycle by assembling the guide vanes 16 of each stage into a whole ring outside the casing in advance, and then assembling the whole ring onto the casing step by step.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-vortex stator assembly guide vane ring assembly process method, characterized in that: The steps include: S1. Assemble the guide vanes of the whole ring piece by piece on the positioning fixture, and fix the guide vanes of the whole ring by the fixing structure on the positioning fixture; The positioning tool comprises a circular chassis and a plurality of the fixing structures arranged along the circumference of the circular chassis, and the circular chassis is provided with a first positioning ring and a second positioning ring for positioning the guide vane; The top stop of the first positioning ring contacts the front mounting edge of the outer edge of the guide vane to radially position the guide vane, and the top of the second positioning ring contacts the inner ring honeycomb of the guide vane to axially position the guide vane; The fixing structure includes a guide bolt arranged on the circular chassis and a slider connected to the guide bolt, the guide bolt drives the slider to move; the slider contacts the groove of the rear mounting edge of the outer edge of the guide vane to perform angular positioning and radial positioning on the guide vane; S2. Place the transfer tooling above the full ring guide vane, and fix the full ring guide vane to the transfer tooling; S3, loosen the fixing structure on the positioning fixture to separate the positioning fixture from the full ring guide vane; S4. Move the complete ring of guide vanes to the casing by using a transfer tool; S5. Loosen the fixed connection between the full ring guide vane and the transfer tooling, remove the transfer tooling, and install the full ring guide vane on the casing.

2. The low vortex stator assembly guide vane ring assembly process according to claim 1 is characterized in that: The guide bolt is arranged on a guide seat above the circular chassis, and a slide groove is arranged on the upper part of the guide seat for the movement of the slider, and the slider contacts the groove of the rear mounting edge of the outer edge of the guide vane.

3. The low vortex stator assembly guide vane ring assembly process according to claim 1, characterized in that: The transfer tooling is a disc structure, and a plurality of cross beams are arranged on the outer edge of the disc structure. The cross beams are connected to the guide vanes by nylon tie bands.

4. The low vortex stator assembly guide vane ring assembly process method according to claim 1, characterized in that: The transfer tool is in contact with the outer edge plate and the inner edge plate of the guide vane.

5. The low vortex stator assembly guide vane ring assembly process method according to claim 3 is characterized in that: A rubber pad is provided at the position where the disc structure contacts the guide vane.

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