Assembly auxiliary device and assembly method of gas turbine guider assembly

Abstract

The invention discloses an assembling auxiliary device and an assembling method for a gas turbine guider assembly, and belongs to the technical field of aero-engine manufacturing, the assembling auxiliary device for the gas turbine guider assembly comprises a base, the upper end face of the base is provided with a step face, and the step face is used for coarse positioning of a guider support; the positioning pin is arranged on the step surface of the base and is used for being matched with the positioning hole of the guider assembly to realize accurate positioning; the bolt supporting pin is arranged on the step surface of the base, is parallel to the positioning pin and is used for supporting a bolt on the guider assembly, so that the threaded end part of the bolt is exposed out of the mounting surface of the guider assembly; and the detection assembly is arranged in the middle of the base and is used for measuring the offset amount of the fan-shaped blades of the guider assembly and the K plane flatness. The technical problems that an existing assembling method is low in assembling efficiency and large in error can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine manufacturing, and particularly to an assembly auxiliary device and an assembly method for a gas turbine guide vane assembly. Background Art

[0002] As a key component of an aero-engine, the guide vane assembly of a gas turbine usually consists of a plurality of sector guide vanes, a sealing structure and a support structure. These vanes are equally spaced along the circumferential direction and need to be sequentially assembled in an Ω-shaped sealing ring and finally fixed to a guide vane bracket.

[0003] The existing assembly method for a gas turbine guide vane assembly usually adopts a manual cooperation method for operation. The specific process is as follows: First, a plurality of sector guide vanes are manually placed in the sealing ring groove in sequence, and the preliminary positioning between the vanes is completed by inserting sealing pieces; then, one person holds the guide vane assembly, and another person uses a tool to insert bolts from the back and manually align the screw holes on the guide vane bracket, and then a third person assists in tightening the nuts from the other side to complete the fixation.

[0004] Due to the annular structure of the guide vane assembly and the slot insertion sealing form between its vanes, the assembly operation has high requirements for position accuracy. The traditional operation requires multiple operators to cooperate, and due to factors such as manual positioning and manual alignment, the efficiency is low and the rework rate is high. In addition, for the misalignment amount between the inner edge and the outer edge of the sector vanes and the flatness of the installation surface K plane, at present, a feeler gauge or a point height gauge is mostly used to manually detect point by point. Not only is the detection efficiency low and the whole circle cannot be continuously covered, but also the error is large and the repeatability is poor, which is difficult to meet the requirements of modern aero-engines for high-precision assembly and quality stability. Summary of the Invention

[0005] The present invention provides an assembly auxiliary device and an assembly method for a gas turbine guide vane assembly to solve the technical problems of low assembly efficiency and large error in the existing assembly method.

[0006] According to one aspect of the present invention, an assembly auxiliary device for a gas turbine guide vane assembly is provided, which includes a base with a stepped surface on its upper end face for rough positioning of the guide vane bracket; positioning pins arranged on the stepped surface of the base for precise positioning in cooperation with the positioning holes of the guide vane assembly; bolt support pins arranged on the stepped surface of the base, parallel to the positioning pins, for supporting the bolts on the guide vane assembly to expose the threaded ends of the bolts outside the mounting surface of the guide vane assembly; a detection component arranged in the middle of the base for measuring the misalignment amount of the sector blades of the guide vane assembly and the flatness of the K plane. The detection component can rotate around the central axis to measure multiple positions of the guide vane assembly, and the rotation axis of the detection component is consistent with the axis direction of the positioning pins on the base; the number of the positioning pins and the bolt support pins corresponds to the number of sector blades of the guide vane assembly, and the positioning pins and the bolt support pins are distributed along the circumferential direction with the rotation center of the detection component as the center of the circle.

[0007] Optionally, the length of the positioning pin is greater than the length of the bolt support pin.

[0008] Optionally, the detection component includes a dial gauge holder rotatably fitted with the base, a connecting head arranged on the dial gauge holder, and a dial gauge rod installed on the connecting head. A measuring dial for contacting the surface to be measured for measurement is installed on the dial gauge rod.

[0009] Optionally, the connecting head includes a dial gauge holder clamping piece, a connecting rod, and a dial gauge rod support part. The dial gauge holder clamping piece is a U-shaped structure including two clamping plates. The dial gauge holder is located between the two clamping plates. The connecting rod penetrates through the two clamping plates. One end of the connecting rod is rotatably fitted with the dial gauge rod support part, and a locking piece is threadedly connected to the other end of the connecting rod.

[0010] Optionally, both the positioning pins and the bolt support pins are detachably connected to the base.

[0011] According to another aspect of the present invention, an assembly method for a gas turbine guide vane assembly is further provided, which includes the following steps: S1. Connect multiple gas turbine guide vanes through the seal strip groove to form a closed annular structure; S2. Assemble and combine the sealing ring with the guide vane assembly that has been connected into a ring; S3. Install the guide vane bracket downward on the base structure, make the positioning pins cooperate with the positioning holes on the guide vane bracket, and make the bolts pre-installed on the bracket correspond to the bolt support pins, so that the tails of the bolts are exposed above the mounting surface of the bracket; S4. Install the guide vane assembly installed in the sealing ring as a whole on the guide vane bracket, align the mounting holes of the guide vane assembly with the bolts, and assemble and lock the nuts to fix the guide vane assembly on the bracket; S5. Through the detection component on the assembly auxiliary device, measure the misalignment amount and the flatness of the K plane of the guide vane assembly to confirm the assembly quality.

[0012] Optionally, step S1 includes the following steps: arranging a plurality of guide vanes in a circle in a preset number sequence along the circumferential direction, with one guide vane set at the reference angular position, a notch provided on the side of each guide vane, and the sealing strip connected to the sealing piece inserted into the notch, so that the guide vanes form a closed ring through the insertion of the sealing strips.

[0013] Optionally, the content measured in step S5 includes: measuring the relative position difference between the inner edge and the outer edge of the guide vane assembly to obtain misalignment data, and measuring multiple height points along the circumferential direction of the end face of the guide vane assembly to evaluate the flatness of the K plane.

[0014] Optionally, step S2 includes the following steps: sequentially inserting the front outer flanges of a plurality of guide vanes into the grooves of the sealing ring, inserting the sealing strips into the corresponding notches of adjacent guide vanes, reserving the installation space for the last guide vane during assembly, and finally forming a tight connection of the guide vane assembly by pushing the sealing ring inward tightly.

[0015] Optionally, when measuring the misalignment of the guide vanes in step S5, through the continuous rotation of the dial indicator support in the detection component, the non-interrupted measurement of the inner edge and the outer edge of the entire circle of guide vanes is realized.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] By providing a step surface for rough positioning of the guide vane support, a positioning pin for precise alignment, and a bolt support pin for the support bolt on the base, the rapid positioning and stable support of the guide vane assembly during the assembly process are effectively realized, significantly simplifying the multi-station cooperation process, allowing a single person to complete the bolt alignment and guide vane installation that originally required multiple people to cooperate, thus greatly improving the assembly efficiency; at the same time, a rotatable detection component is provided in the center of the device, and in combination with the measuring instrument, the misalignment of the entire circle of guide vanes and the flatness of the K plane are continuously measured, overcoming the limitations of traditional point-type manual detection, improving the detection coverage rate and measurement accuracy, and significantly reducing the assembly error. In addition, the device structure is modular, the positioning pins and bolt support pins are evenly distributed in a circle according to the number of guide vanes, and can be detachably replaced to adapt to different specifications of guide vanes, with good versatility and adaptability; the rotation axis of the detection component is consistent with the positioning reference, ensuring that the measurement path is concentric with the structural axis, enhancing the consistency and repeatability of the measurement results.

[0018] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The following will refer to the drawings for a further detailed description of the present invention. Description of the Drawings

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A cross-sectional view of the assembly auxiliary device for the gas turbine guide vane assembly of the present invention;

[0021] Figure 2 A top view of the assembly auxiliary device for the gas turbine guide vane assembly of the present invention;

[0022] Figure 3 is Figure 1 A partial cross-sectional view taken along C-C in

[0023] Figure 4 A structural schematic diagram of the gas turbine guide vane assembly;

[0024] Figure 5 A schematic diagram of the measurement positions of the radial misalignment amount between the inner edge and the outer edge of the blade in the assembly method of the present invention;

[0025] Figure 6 A schematic diagram of the measurement position of plane K in the assembly method of the present invention.

[0026] Legend:

[0027] 1. Base; 2. Gauge rod; 3. Locating pin; 4. Gauge stand; 5. Gauge rod joint; 51. Clamping plate; 52. Connecting rod; 53. Locking member; 54. Gauge rod support part; 6. Welding handle; 7. Bolt support pin. Detailed implementation manners

[0028] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the following.

[0029] The following will be further described in detail with reference to the attached Figures 1-6 to further illustrate the present application.

[0030] The embodiments of the present application disclose an assembly auxiliary device and an assembly method for a gas turbine guide vane assembly.

[0031] Referring to Figure 1 , the assembly auxiliary device for the gas turbine guide vane assembly mainly includes a base 1, a locating pin 3, a bolt support pin 7, and a detection assembly.

[0032] The base 1 serves as the support and positioning platform for the entire device and is made of a rigid structure. The upper end face of the base 1 is provided with a stepped surface for supporting the guide vane holder and providing a rough positioning reference, which is the spatial and position reference surface for the entire assembly process. Preliminary positioning is achieved through the stepped surface of the base 1, and precise hole alignment is carried out in cooperation with the positioning pin 3, significantly reducing the time and error required for traditional manual centering operations. In this embodiment, the base 1 is a hollow frame structure formed by integral milling and is made of a lightweight alloy material, which not only ensures the structural strength but also significantly reduces the overall weight of the device, facilitating on-site operation and handling. The stepped structure on the upper end face of the base 1 forms an installation reference surface for supporting the guide vane holder and defining its initial placement position in the vertical direction. In actual use, only by placing the guide vane holder downward on the stepped structure and relying on the stable support provided by the structure of the base 1 can the preliminary positioning be completed, significantly reducing the jitter and offset phenomena during the traditional placement process of the holder.

[0033] The positioning pin 3 is used to cooperate with the positioning holes of the guide vane assembly to achieve precise positioning of the guide vane holder in the horizontal direction, ensuring that the holder does not rotate or shift during the assembly process, and providing a basic guarantee for the subsequent accurate assembly of the guide vane assembly. During use, the guide vane holder is inserted and cooperated with the positioning pin 3 on the base 1 through a plurality of positioning holes provided thereon to complete precise alignment in the circumferential and radial directions. This structure effectively avoids the rotation error and eccentricity problems of the holder during the assembly process, significantly improving the assembly consistency. In a specific implementation manner, the end of the positioning pin 3 can be designed as a tapered structure for realizing the functions of self-guidance and self-centering; it can also be designed as an axially adjustable structure, and the height can be adjusted through threads or positioning slots to adapt to workpiece structures of different heights, enhancing the compatibility and adjustment flexibility of the device.

[0034] The bolt support pin 7 is arranged on the stepped surface of the base 1 and is arranged in parallel with the positioning pin 3. It is used to provide support after pre-installing bolts on the guide vane holder, making the threaded end stably exposed above the installation surface, which helps the subsequent installation operation of the locking part 53 and can uniformly control the protrusion amount of the bolts, improving the consistency and reliability of bolt connection. By supporting the pre-installed bolts on the holder through the bolt support pin 7, rapid alignment and insertion support of the holes of the guide vane assembly are achieved, enabling the guide vane to be conveniently assembled to the holder as a whole; all bolts are supported by the bolt support pin 7, making the exposed height of the threaded ends consistent, ensuring the consistency of the pre-tightening force of each locking nut, and avoiding assembly deviations or local looseness caused by differences in tightening degrees.

[0035] Before assembly, the hexagon socket head bolt is pre-inserted into the guide bracket and positioned by aligning with the support pin on the base 1. The head part of the bolt is supported by the support pin to ensure that the bolt will not slip, and the threaded end naturally extends vertically downward through the mounting surface of the bracket, forming a uniformly high exposed amount. Such a structure supports single-person operation without the need for auxiliary pushing on the back of the bracket, improving the assembly efficiency and ergonomic performance. To achieve higher positioning accuracy and operation convenience, the support pin can also be designed with a groove structure at the end to lock the bolt head and prevent it from rotating.

[0036] In this embodiment, the number of the positioning pins 3 and the bolt support pins 7 corresponds to the number of the fan-shaped blades of the guide assembly and is distributed along the circumferential direction with the rotation center of the detection assembly as the center of the circle, which can ensure that each guide vane obtains independent and equally spaced positioning and support during the assembly process, so as to achieve concentric assembly and balanced force of the entire guide assembly. The axial height of each positioning pin 3 is higher than that of the bolt support pin 7, and its main function is to achieve prior guidance and positioning during the installation process of the guide assembly. When the guide bracket is placed downward on the assembly auxiliary device, the higher positioning pin 3 can be inserted into the positioning hole on the bracket prior to the bolt support pin 7, quickly establishing a spatial position reference and achieving precise alignment of the assembly in the radial and circumferential directions; at the same time, the lower bolt support pin 7 only contacts and supports the bolt after the positioning is completed, avoiding interference or misguidance during the initial placement stage.

[0037] In a specific implementation manner, both the positioning pin 3 and the bolt support pin 7 are detachably connected to the base 1. Through the detachable structure, the user can freely replace the positioning pin 3 and the support pin with different numbers, lengths or diameters according to different models or specifications of the gas turbine guide assembly, so that the same assembly auxiliary device is applicable to multiple types of guide assemblies, reducing the tooling replacement cost and improving the equipment utilization rate. In addition, if the positioning pin 3 or the support pin needs to be replaced due to wear or damage during the assembly process, it can also be quickly disassembled and replaced, significantly improving the maintenance efficiency. Specifically, the detachable connection between the positioning pin 3 and the bolt support pin 7 and the base 1 includes a threaded connection method and a plug-and-play cooperation method. The threaded connection method is to set an internal threaded hole on the base 1 and process an external thread at the lower end of the pin part, and the installation is completed by screwing, which has the advantages of firm connection and strong reusability; the plug-and-play cooperation method is to set a positioning hole on the base 1, and after the pin part is inserted, it is locked by laterally inserting a limit pin or a spring pin, which can achieve quick plugging and unplugging and is suitable for frequent replacement scenarios on site.

[0038] Refer to Figure 1 and Figure 2, the detection component is arranged at the central position of the device base 1. This component includes a dial gauge holder 4 that can rotate around the central axis, a connector arranged on the dial gauge holder 4, a dial rod 2, and a measuring gauge. The rotation axis is consistent with the axis directions of the positioning pin 3 and the bolt support pin 7, ensuring that the measurement path is consistent with the center of the guide component circle, and improving the measurement accuracy.

[0039] Refer to Figure 3 , in this embodiment, the connector includes a dial gauge holder 4 clamping member, a connecting rod 52, and a dial rod 2 support portion. The dial gauge holder 4 clamping member has a U-shaped structure and includes two clamping plates 51. The dial gauge holder 4 is located between the two clamping plates 51. The connecting rod 52 penetrates through the two clamping plates 51. One end of the connecting rod 52 is rotatably matched with the dial rod 2 support portion, and the other end of the connecting rod 52 is threadedly connected with a locking member 53. By setting the dial gauge holder 4 clamping member with a U-shaped structure including two clamping plates 51, reliable clamping and positioning of the dial gauge holder 4 are achieved; when the locking member 53 is loosened, the connecting rod 52 drives the clamping plates 51 to open, releasing the clamping force on the dial gauge holder 4, enabling the connector to slide along the dial gauge holder 4, realizing continuously adjustable height of the measuring gauge, and adapting to the height requirements of different blades or measuring points. At the same time, one end of the connecting rod 52 is rotatably connected with the dial rod 2 support portion, enabling the installation angle of the measuring gauge to be finely adjusted according to the position of the measured surface, thus ensuring that the measuring head is always perpendicular to the surface to be measured in contact, and improving the measurement accuracy and adaptability.

[0040] During the use process, the dial gauge holder 4 can be manually rotated to make the measuring gauge sequentially contact the inner edge, outer edge, or K-plane mounting surface of the guide vane along an arc path. The height difference or position offset at each position is continuously read through the measuring head on the dial rod 2, and the stagger amount and K-plane flatness data of the entire circle of fan-shaped blades are obtained. This method overcomes the inefficiency and discontinuity defects of traditional manual point-by-point detection. In this embodiment, the measuring gauge uses a contact type dial indicator. The contact type dial indicator directly contacts the measured surface through a mechanical measuring head, and the displacement change is converted into a pointer reading through a lever amplification structure. The operator can quickly obtain high-precision data, which is suitable for quick judgment in the on-site environment. In addition, the contact type dial indicator can be installed on various forms of brackets and jigs through the dial rod 2, and can flexibly adjust the direction and angle of the measuring head to meet the measurement requirements of various curved surfaces or inclined surfaces of the guide component.

[0041] According to another aspect of the present invention, an assembly method for a gas turbine guide component is also provided, which includes the following steps:

[0042] S1: Pre-assemble the guide vane component into a closed ring;

[0043] S2: Insert the closed guide vane component into the sealing ring;

[0044] S3: Install the guide support to the assembly auxiliary device;

[0045] S4: Install the guide vane assembly as a whole onto the guide vane support;

[0046] S5: Detect the stagger of the sector vanes and the flatness of the K plane through the detection assembly.

[0047] Through the above five steps, an integrated process of assembly operation and assembly precision detection is achieved, forming an assembly-detection-adjustment closed loop, which is applicable to the rapid and batch assembly scenarios of multiple sector guide vanes in aeroengines.

[0048] The following is a specific description of each step:

[0049] S1: Refer to Figure 4 , pre-assemble the guide vane assembly. In this step, first arrange multiple gas turbine guide vanes in sequence in a clockwise numbering order. The numbering is usually marked with ink on the back of the vane for easy identification of the assembly order. Place the No. 1 guide vane at the 12 o'clock position, and the rest are placed in sequence in the clockwise direction, so that they form an approximately complete circular arrangement as a whole. Subsequently, insert the corresponding seal segments and sealing strips into the grooves on the side edges of each guide vane, and connect adjacent vanes through the sealing strips in a plug-in manner, finally forming a closed guide vane ring. By forming an integrated vane ring before formal assembly, subsequent unified assembly operations can be realized, avoiding phenomena such as misalignment and seal segment detachment during piece-by-piece installation, and improving the integrity and consistency of the assembly.

[0050] S2: Seal ring assembly. After the guide vane assembly forms a closed structure, sleeved each piece of the assembly into the Ω-shaped seal ring one by one. The specific operation is to insert the front outer flange of each guide vane into the seal ring notch, and ensure that the sealing strip is inserted into the docking groove of the adjacent guide vane. During the assembly process, the position of the last vane (usually No. 12) should be left vacant to enable pre-tightening positioning of the first 11 pieces. Finally, after inserting the No. 12 guide vane, push the seal ring inward as a whole to make its structure tense, ensuring that all guide vane sealing strips are correctly inserted and fitted, and finally forming a complete, stable and non-loose closed guide assembly. By uniformly restricting the 12 guide vanes through the seal ring, the assembly forms a quasi-integral structure, which can automatically maintain the axial tightness and circumferential seal continuity between the guide vanes, effectively avoiding problems such as local stress concentration and uneven assembly.

[0051] S3: Install the guide vane support. In this step, the operator places the guide vane support downward on the base 1 of the assembly auxiliary device. The lower surface of the support fits with the step structure on the base 1, thus completing the preliminary placement. Subsequently, insert multiple positioning holes on the support into the corresponding positioning pins 3 on the base 1 respectively to achieve precise circumferential and radial positioning. Insert the hexagon socket head bolts into the bolt holes of the support in advance, and ensure that their threaded ends pass through the bolt support pins 7 on the step surface of the base 1, so that the bolt tails are naturally exposed, facilitating subsequent nut tightening. The positioning pins 3 and the support pins are circumferentially distributed, and the quantity corresponds to the blades. Combined with the limit of the step surface of the base 1, automatic guiding and stable support can be achieved without manual leveling, greatly improving the assembly alignment efficiency and reducing the operation intensity.

[0052] Alternative method: The support can be designed with a guiding bevel to make the insertion process of the positioning pin 3 smoother; the base 1 of the positioning pin 3 can adopt a structure with adjustable height to adapt to different support sizes.

[0053] S4: Integrally assemble the guide vane assembly. In this step, insert the completed closed guide vane assembly as a whole from above onto the guide vane support, ensuring that the bolt holes on the guide vane assembly correspond one by one to the pre-installed bolt positions on the support. Subsequently, install the lock nuts in sequence, and use a torque wrench to tighten the bolts according to the standard pre-tightening sequence to complete the structural locking.

[0054] The technical advantage is that the integral assembly method avoids problems such as blade misalignment, seal detachment, and incorrect hole alignment caused by piece-by-piece insertion, greatly improving the assembly efficiency and consistency; the bolt height is uniformly limited by the support pins, ensuring that the tightening torque conditions of all nuts are the same, and avoiding poor local clamping.

[0055] S5: Refer to Figure 5 and Figure 6 , for assembly quality inspection. After the assembly is completed, the operator starts or manually rotates the detection component installed in the center of the assembly auxiliary device, so that the gauge holder 4 drives the measuring gauge to rotate around the circumference of the guide vane assembly. The probe of the measuring gauge contacts the inner edge, outer edge, and K-plane mounting surface of the guide vane respectively, and continuously reads the position change values at different angles. The specific inspection contents include: 1) The radial displacement between the inner edge and the outer edge of the blade to judge whether there is an assembly deviation between the guide vanes; 2) The flatness detection of the K-plane. Read the height difference values of each equally spaced measuring point through the measuring gauge, and calculate the maximum runout and the error range. The detection component is a central rotation structure, and the measurement process is continuous and non-interrupted, which can quickly complete the error scanning of the whole circle, significantly superior to the traditional point measurement method. The measurement accuracy is high and the repeatability is good, providing a reliable basis for the determination of assembly quality and subsequent optimization.

[0056] This solution realizes the efficient assembly and precise detection of the guide vane support and guide vane assembly by designing an assembly auxiliary device for gas turbine guide vane components that integrates positioning, support, and detection, combined with an optimized assembly method, and has comprehensive advantages in many aspects. First, in terms of structural design, the positioning pins 3 and the bolt support pins 7 are circumferentially equidistantly arranged according to the number of guide vanes and are coaxially set with the rotation axis of the detection component, so that the entire assembly process is carried out around the geometric center, ensuring the consistency and symmetry of the assembly, and effectively avoiding the problem of uneven assembly caused by eccentricity or blade angle error; the height of the positioning pins 3 is slightly higher than that of the bolt support pins 7 to ensure that the precise positioning of the support is completed first during installation, and then the bolts are supported to avoid mutual interference, improving the stability of positioning and support; the support pins expose the threaded ends of the bolts uniformly, providing a unified reference for subsequent tightening, improving the assembly quality and reliability of the bolts; the base 1 is a hollow integral structure, lightweight and easy to carry, and the stepped surface forms a reference positioning, which helps to quickly align and repeat positioning during the assembly process; the detection component is located at the center position, and a rotatable dial gauge stand 4 is used in combination with the dial gauge rod 2 and the dial indicator to realize continuous and non-interrupted detection of the misalignment of the inner and outer edges of the guide vane and the flatness of the K plane, replacing the inefficient detection methods of traditional feeler gauges and single-point measurements, and significantly improving the measurement accuracy and coverage; the dial gauge stand 4 and the connector adopt an adjustable structure, which can not only slide and adjust the measurement height, but also fine-tune the measurement angle by rotation to adapt to different measuring point requirements and structural size changes; all the positioning pins 3 and the support pins adopt a detachable structure, which is convenient for replacement, maintenance or adaptation to different models of guide vane supports, improving the versatility and modularization level; the supporting assembly method first integrally assembles the guide vanes and seals the sealing strips, then integrally inserts them into the support, and finally uniformly tightens the bolts and detects the errors, constructing a standardized, batch-oriented, and highly consistent assembly process, avoiding risks such as sealing misalignment and blade tilt caused by piecemeal insertion, significantly improving the assembly efficiency, and finally forming an assembly-detection-feedback closed-loop control system, which is widely applicable to high-precision and highly consistent assembly tasks of multi-piece annular fan-shaped components such as aero-engine gas turbine guide vanes.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An assembly auxiliary device for a gas turbine guide vane assembly, characterized in that: include: The base (1) has a stepped surface on its upper end surface for coarse positioning of the guide bracket; A positioning pin (3) is arranged on the stepped surface of the base (1) and is used to cooperate with the positioning hole of the guide assembly to achieve precise positioning; a bolt support pin (7) is arranged on the stepped surface of the base (1), and the bolt support pin (7) is arranged parallel to the positioning pin (3) and is used to support the bolt on the guide assembly so that the threaded end of the bolt is exposed on the installation surface of the guide assembly; A detection assembly is arranged in the middle of the base (1) and is used to measure the displacement of the fan-shaped blades of the guide assembly and the flatness of the K plane. The detection assembly can rotate around the central axis to measure multiple positions of the guide assembly. The rotation axis of the detection assembly is consistent with the axis direction of the positioning pin (3) on the base (1); The number of the positioning pins (3) and the bolt support pins (7) corresponds to the number of the fan-shaped blades of the guide assembly, and the positioning pins (3) and the bolt support pins (7) are distributed along a circumferential direction with the rotation center of the detection assembly as the center of the circle.

2. The assembly auxiliary device of the gas turbine guide vane assembly according to claim 1, characterized in that: The length of the positioning pin (3) is greater than the length of the bolt support pin (7).

3. The assembly auxiliary device of the gas turbine guide vane assembly according to claim 2, characterized in that: The detection assembly comprises a meter frame (4) rotatably matched with a base (1), a connector arranged on the meter frame (4), and a meter rod (2) mounted on the connector, wherein a measuring meter for contacting a surface to be measured to achieve measurement is mounted on the meter rod (2).

4. The assembly auxiliary device for a gas turbine guide vane assembly according to claim 3, characterized in that: The connecting head comprises a meter frame (4) clamping piece, a connecting rod (52) and a meter rod (2) supporting portion, the meter frame (4) clamping piece is a U-shaped structure comprising two clamping plates (51), the meter frame (4) is located between the two clamping plates (51), the connecting rod (52) passes through the two clamping plates (51), one end of the connecting rod (52) is rotatably matched with the meter rod (2) supporting portion, and the other end of the connecting rod (52) is threadedly connected with a locking piece (53).

5. The assembly auxiliary device of the gas turbine guide vane assembly according to claim 1, characterized in that The positioning pin (3) and the bolt support pin (7) are both detachably connected to the base (1).

6. A method for assembling a gas turbine guide vane assembly, using the auxiliary assembly device for a gas turbine guide vane assembly according to any one of claims 1 to 5, characterized in that: The steps include: S1. Connecting a plurality of gas turbine guide blades through a sealing strip groove to form a closed annular structure; S2, assembling the sealing ring and the guide blade assembly connected into a ring; S3, install the guide bracket downward on the base (1) structure, so that the positioning pin (3) matches the positioning hole on the guide bracket, and the bolt pre-installed on the bracket is positioned corresponding to the bolt support pin (7), so that the tail of the bolt is exposed above the bracket installation surface; S4. Install the guide vane assembly installed in the sealing ring on the guide bracket as a whole, align the installation hole of the guide vane assembly with the bolt, and assemble the locking nut to fix the guide vane assembly on the bracket; S5. Use the detection component on the assembly auxiliary device to measure the misalignment and K-plane flatness of the guide assembly to confirm the assembly quality.

7. The method for assembling a gas turbine guide vane assembly according to claim 6, characterized in that: Step S1 includes the following steps: arranging a plurality of guide blades in sequence along the circumferential direction according to a preset numbering order to form a ring, wherein one guide blade is set at a reference angle position, a notch is provided on the side of each guide blade, a sealing strip connected to the sealing piece is inserted into the notch, and the guide blades are connected through the sealing strip to form a closed ring.

8. The method for assembling a gas turbine guide vane assembly according to claim 6, characterized in that: The contents of the measurement in step S5 include: measuring the relative position difference between the inner edge and the outer edge of the guide vane assembly to obtain the offset data, and measuring multiple height points along the circumference of the end face of the guide vane assembly to evaluate the flatness of the K plane.

9. The method for assembling a gas turbine guide vane assembly according to claim 6, characterized in that: Step S2 includes the following steps: inserting the front outer flanges of multiple guide blades into the grooves of the sealing ring in sequence, inserting the sealing strips into the corresponding notches of adjacent guide blades, reserving installation space for the last guide blade during assembly, and finally forming a tight connection between the guide blade assembly by pushing the sealing ring inward.

10. The method for assembling a gas turbine guide vane assembly according to claim 6, characterized in that: When measuring the blade offset in step S5, the non-interrupted measurement of the inner edge and the outer edge of the entire circle of the guide blade is achieved by continuously rotating the meter frame (4) in the detection assembly.

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