Aeroengine rotor and stator center alignment inspection tool

Abstract

The invention belongs to the technical field of aero-engines, and particularly relates to an aero-engine rotor and stator center alignment inspection tool which comprises a support A, a support B, a supporting rod, an alignment block, a pressing block and a laser. One end of the support A and one end of the support B are provided with through holes used for being matched with a cylindrical pin shaft of a tool for assembling an engine, the end faces of the other ends of the support A and the support B are provided with square holes, the two sides of the supporting rod are provided with quadrangular columns capable of being inserted into the square holes in a sliding mode, key grooves are formed in the surfaces of the support A and the support B, and screws penetrate through the key grooves to be connected with threaded holes in the supporting rod. The locking device is used for locking and positioning the bracket A and the bracket B; the alignment block and the pressing block are clamped and pressed on the supporting rod through bolts, and the alignment block is provided with a round hole for installing a laser. A circumferential groove is formed in the surface of the laser and matched with the limiting pin, and fine adjustment of the irradiation direction is achieved through an adjusting structure of the alignment block. The laser device is installed on the alignment block and is used for emitting laser to inspect the center alignment of the rotor and the stator.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to a tooling for aligning and inspecting the center of aero-engine rotor-stator. Background Technology

[0002] The central position relationship between the rotor and stator of an aero-engine directly determines the assembly quality. A large deviation between the rotor and stator centers will cause the engine blades to rub against the casing, the honeycomb and grating structures of the sealing, and may also cause large engine vibration due to the eccentricity of the rotor and stator.

[0003] Currently, the alignment of the rotor and stator is only checked by the operator's visual observation. The location to be checked is shown below. Figure 8 In the area marked with an asterisk, different inspectors observed different results, and the angular positioning results of the rotating stator also differed.

[0004] There is currently no suitable tooling for checking the centering of the rotor and stator. Inspectors rely on experience to visually align the center, resulting in uncontrollable deviations and poor engine assembly quality.

[0005] Due to spatial limitations, the distance between inspectors and the engine structure used to check the alignment of the rotor and stator is too great, making it difficult to observe.

[0006] Cost and Efficiency: Engine testing may be interrupted due to misalignment of the rotor and stator, affecting delivery schedules. Disassembling the engine for troubleshooting would result in significant economic losses and delays in assembly. Summary of the Invention

[0007] To address the aforementioned issues, this application provides a tooling for aligning and inspecting the center of rotation of an aero-engine stator, comprising: a bracket A, a bracket B, a support rod, an alignment block, a clamping block, and a laser.

[0008] The brackets A and B each have a through hole at one end for engaging with a cylindrical pin of an engine assembly tooling. The other end has a square hole on its face. The support rod has square prisms on both sides that can slide into the square hole. The surfaces of brackets A and B are provided with keyways, through which screws pass and connect to threaded holes on the support rod for locking and positioning brackets A and B. The middle section of the support rod is cylindrical.

[0009] The alignment block and the clamping block are clamped and pressed onto the cylindrical section of the support rod by bolts. The alignment block has a circular hole for mounting the laser.

[0010] The laser surface has circumferential grooves that engage with limiting pins, allowing for fine-tuning of the irradiation direction via an adjustment structure on the alignment block. The laser is mounted on the alignment block and is used to emit laser light to verify the alignment of the rotor-stator center.

[0011] Preferably, the laser surface is provided with a circumferential groove, which cooperates with the limiting pin on the aligning block circular hole to restrict the axial installation position of the laser.

[0012] Preferably, the laser surface has axial grooves to avoid the limiting pins and facilitate the insertion of the laser into the circular hole.

[0013] Preferably, the clamping block and the alignment block can rotate together around the support rod.

[0014] Preferably, the leveling mechanism includes a leveling block, a leveling screw, and a limit pin;

[0015] The limiting pin is placed in the mounting hole of the bracket B, and the horizontal adjusting screw is placed in the mounting hole;

[0016] The horizontal adjusting screw has an annular groove that engages with a limiting pin and is threadedly connected to the horizontal adjusting block.

[0017] When the horizontal adjusting screw is rotated, the limiting pin restricts the axial displacement of the horizontal adjusting screw, and the horizontal adjusting block slides up and down in the groove of bracket B. When its lower surface protrudes, it supports the rear end face of the casing, thus adjusting the height of bracket B.

[0018] Preferably, the circular hole of the alignment block is designed with a 1mm straight section to form an installation gap with the laser. A threaded hole and an adjusting screw installed in the threaded hole are provided on one side of the circular hole. The adjusting screw abuts against the surface of the laser. By rotating the adjusting screw, the laser can be pushed to achieve precise adjustment of the irradiation angle.

[0019] A method for aligning and inspecting the center of an engine stator, using the aforementioned aero-engine stator center alignment inspection fixture, includes the following steps:

[0020] Adjust the telescoping amount between bracket A and bracket B and the support rod, and install the fixture on the engine stator casing;

[0021] Use a level to measure the levelness of the rear end face of the casing and the upper end face of bracket B respectively, and adjust them to be level with the leveling mechanism.

[0022] Rotate the adjusting screw to fine-tune the laser's irradiation direction;

[0023] The swinging alignment block allows the laser emitted by the laser to illuminate the asterisk position directly above and directly below the casing;

[0024] Adjust the rotor so that the laser can irradiate points A and B during the oscillation process, thus completing the center alignment test of the rotor and stator.

[0025] This application enables precise inspection of the alignment of the engine's rotor and stator centers, improving accuracy compared to inspectors relying on visual observation from a distance.

[0026] It can ensure that the engine rotor-stator clearance is evenly distributed in the circumference, reduce blade tip and casing friction, reduce the degree of "shaft seizure", and improve engine vibration. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the tooling for aligning and inspecting the rotor center of an aero-engine;

[0028] Figure 2 This is a diagram showing the laser installation;

[0029] Figure 3 This is a diagram showing the installation of the upright block;

[0030] Figure 4 This is a schematic diagram of the horizontal adjustment mechanism;

[0031] Figure 5 This is a cross-sectional view of the tooling for aligning the rotor center of an aero-engine.

[0032] Figure 6 This is a cross-sectional view of the laser installation.

[0033] Figure 7 This is a schematic diagram of a laser;

[0034] Figure 8 This is a schematic diagram for checking the alignment of the engine stator. Detailed Implementation

[0035] 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. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some embodiments of this application, not all embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. Figures 1-8 As shown, this application provides a tooling for aligning and inspecting the center of aero-engine rotor, including: bracket A1, bracket B2, support rod 3, alignment block 4, clamping block 5 and laser 7;

[0036] The brackets A1 and B2 have through holes at one end for engaging with cylindrical pins of engine assembly fixtures, and square holes at the other end. The support rod 3 has slidable quadrangular prisms on both sides that can be inserted into the square holes. Keyways are provided on the surfaces of brackets A1 and B2, and screws 8 pass through these keyways and connect to threaded holes on the support rod 3 for locking and positioning brackets A1 and B2. The middle section of the support rod 3 is cylindrical.

[0037] The middle part of the support rod 3 is cylindrical. The alignment block 4 and the clamping block 5 are fixed to the cylinder of the support rod 3 by four screws 12. See Figure 5 The positive block 4 has a round hole for mounting the laser 7, and there are two screws 9 on the upper part of the positive block 4 for fixing the laser 7.

[0038] The laser 7 has circumferential grooves on its surface that engage with limiting pins, allowing for fine-tuning of the irradiation direction via the adjustment structure of the alignment block 4. The laser 7 is mounted on the alignment block 4 and is used to emit laser light to verify the alignment of the rotor-stator center.

[0039] Preferably, the surface of the laser 7 is provided with a circumferential groove, which cooperates with the limiting pin 13 on the circular hole of the alignment block 4 to limit the axial installation position of the laser 7.

[0040] Preferably, the laser 7 has an axial groove on its surface to avoid the limiting pin 13, facilitating the insertion of the laser 7 into the circular hole. The clamping block 5 and the alignment block 4 are both rotatable around the support rod 3.

[0041] Preferably, the leveling mechanism includes a leveling block 6, a leveling screw 10, and a limiting pin 11; the limiting pin 11 is cylindrical and is interference-fitted with the bracket B.

[0042] The limiting pin 11 is partially placed in the mounting hole of the bracket B2, and the horizontal adjusting screw 10 is placed in the mounting hole;

[0043] The horizontal adjusting screw 10 has an annular groove that cooperates with the limiting pin 11 and is threadedly connected to the horizontal adjusting block 6.

[0044] When the horizontal adjusting screw 10 is rotated, the limiting pin 11 restricts the axial displacement of the horizontal adjusting screw 10, and the horizontal adjusting block 6 slides up and down in the groove of the bracket B2. When its lower surface protrudes, it supports the rear end face of the casing, thus adjusting the height of the bracket B2.

[0045] Preferably, the circular hole of the alignment block 4 is designed with a 1mm straight section to form an installation gap with the laser 7. A threaded hole and an adjusting screw 14 installed in the threaded hole are provided on one side of the circular hole. The adjusting screw 14 abuts against the surface of the laser 7. By rotating the adjusting screw 14, the laser 7 is pushed to achieve precise adjustment of the irradiation angle.

[0046] Principles and kinematic relationships

[0047] Adjust the extension and retraction between bracket A1 and bracket B2 and support rod 3, connect the circular through holes on both sides of bracket A1 and bracket B2 to the engine stator casing, and initially determine the tooling position relationship.

[0048] Tooling body leveling adjustment

[0049] The levelness was measured using a level on the rear end face of the engine stator casing and the upper end face of bracket B. If the levelness was inconsistent, the leveling screw 10 was rotated to adjust the height of the upper end face of bracket B until the levelness was consistent.

[0050] The leveling screw 10 is axially limited by the limiting pin 11, allowing only rotation. The leveling screw 10 is threadedly connected to the leveling block 6. When the leveling screw 10 rotates, the leveling block 6 can slide up and down in the groove of the bracket B. When the lower surface of the leveling block 6 protrudes from the lower surface of the bracket B, the lower surface of the leveling block 6 can be supported on the rear end face of the stator casing, thus achieving adjustment of the tooling's levelness. This is suitable for situations where the rear end face of some engine casings is uneven or has other structural interference, such as circumferentially distributed odd-numbered bosses.

[0051] Laser irradiation direction adjustment

[0052] Laser 7 Figure 8 The surface has two grooves. The circumferential groove engages with the limiting pin to initially determine the laser's installation position. Due to the 1mm straight section in the four circular holes of the alignment block, the laser deflects slightly in the horizontal direction within the four circular holes of the alignment block. The laser's irradiation direction can be adjusted by rotating the adjusting screw 14.

[0053] Center-based verification

[0054] After the alignment block 4 and the clamping block 5 are connected by screw 12, they can rotate freely around the cylinder of the support rod 3. During operation, the laser emitted by the laser first illuminates the position directly above the casing. The alignment block 4 is then swung to check if the laser can illuminate the position directly below the casing. If the laser can illuminate the position directly below the casing, the tooling calibration is considered qualified. The rotor is adjusted so that the laser can illuminate points A and B respectively when the laser is swung, thus completing the engine stator center alignment check.

[0055] 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 tooling for aligning and inspecting the center of aero-engine stator, characterized in that, include: Support A (1), support B (2), support rod (3), alignment block (4), clamping block (5) and laser (7); One end of bracket A (1) and bracket B (2) has a through hole for engaging with a cylindrical pin of an engine assembly tool. The other end has a square hole. The support rod (3) has quadrangular prisms on both sides that can slide into the square hole. The surfaces of bracket A (1) and bracket B (2) are provided with keyways. Screws (8) pass through the keyways and connect to the threaded holes on the support rod (3) for locking and positioning bracket A (1) and bracket B (2). The middle part of the support rod (3) is a cylindrical section. The alignment block (4) and the clamping block (5) are clamped and pressed onto the cylindrical section of the support rod (3) by bolts. The alignment block (4) has a circular hole for mounting the laser (7). The laser (7) has a circumferential groove on its surface that cooperates with a limiting pin. The irradiation direction can be finely adjusted by adjusting the alignment block (4). The laser (7) is mounted on the alignment block (4) and is used to emit laser to check the alignment of the rotating stator center.

2. The aero-engine stator center alignment inspection fixture as described in claim 1, characterized in that, The laser (7) has a circumferential groove on its surface. The circumferential groove cooperates with the limiting pin (13) on the circular hole of the alignment block (4) to limit the axial installation position of the laser (7).

3. The aero-engine stator center alignment inspection fixture as described in claim 2, characterized in that, The laser (7) has an axial groove on its surface to avoid the limiting pin (13) and facilitate the insertion of the laser (7) into the round hole.

4. The aero-engine stator center alignment inspection fixture as described in claim 1, characterized in that, The clamping block (5) and the alignment block (4) can rotate together around the support rod (3).

5. The aero-engine stator center alignment inspection fixture as described in claim 1, characterized in that, The bracket B (2) has a horizontal adjustment mechanism, which includes a horizontal adjustment block (6), a horizontal adjustment screw (10) and a limit pin (11). The limiting pin (11) is partially placed in the mounting hole of the bracket B (2), and the horizontal adjusting screw (10) is placed in the mounting hole; The horizontal adjusting screw (10) is provided with an annular groove that cooperates with the limiting pin (11) and is threadedly connected to the horizontal adjusting block (6); When the horizontal adjusting screw (10) is rotated, the limiting pin (11) restricts the axial displacement of the horizontal adjusting screw (10), and the horizontal adjusting block (6) slides up and down in the groove of the bracket B (2). When its lower surface protrudes, it supports the rear end face of the casing, thus adjusting the height of the bracket B (2).

6. The aero-engine stator center alignment inspection fixture as described in claim 1, characterized in that, The alignment block (4) has a 1mm straight section on the round hole, which forms an installation gap with the laser (7). A threaded hole and an adjusting screw (14) installed in the threaded hole are provided on one side of the round hole. The adjusting screw (14) abuts against the surface of the laser (7). By rotating the adjusting screw (14), the laser (7) is pushed to achieve precise adjustment of the irradiation angle.

7. A method for inspecting the alignment of an engine stator, characterized in that, The aero-engine stator center alignment inspection fixture according to any one of claims 1-6 includes the following steps: Adjust the amount of extension and retraction between bracket A (1) and bracket B (2) and support rod (3) and install the tooling on the engine stator casing; Use a level to measure the levelness of the rear end face of the casing and the upper end face of the bracket B (2) respectively, and adjust them to be level with the leveling mechanism; Rotate the adjusting screw (14) to fine-tune the laser (7) irradiation direction; The swinging alignment block (4) makes the laser emitted by the laser illuminate the star position directly above and directly below the casing; Adjust the rotor so that the laser can irradiate points A and B during the oscillation process, thus completing the center alignment test of the rotor and stator.

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