Compressor rotor blade tip strengthening coating spraying protection tool and installation method

Abstract

The application discloses a compressor rotor blade tip strengthening coating spraying protection tool, which comprises a base and a protection clamping unit installed on the base; the protection clamping unit comprises a mounting seat, a limiting assembly and a shielding assembly; the mounting seat is arranged on the base; the limiting assembly is used for clamping and fixing a blade; the shielding assembly is arranged on one side of the limiting assembly; the shielding assembly is used for shielding a non-spraying area on the blade; and the shielding assembly is slidably arranged on the mounting seat so as to adjust the gap between the shielding assembly and the blade; the tool is used for fixing the blade and protecting the non-spraying area when a coating is deposited on the tip of the compressor rotor blade for lengthening repair.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aero-engine maintenance, and particularly relates to a compressor rotor blade tip strengthened coating spraying protection tool and an installation method. BACKGROUND

[0002] As a core component of an aero-engine, a compressor rotor blade is long-term in a high-temperature, high-pressure and complex stress coupling environment, especially the blade tip part, which will continuously rub against a stator during service, thereby causing blade tip wear. In order to improve the wear resistance of the compressor rotor blade tip, at present, a coating is mainly deposited on the compressor rotor blade tip by means of laser cladding, chemical vapor deposition, micro-beam plasma welding, spraying and the like to extend and repair the blade tip so as to improve the service life of the blade tip.

[0003] In the process of preparing the compressor rotor blade tip coating by means of spraying, the blade needs to be fixed and the non-spraying area needs to be shielded and protected due to the small spraying area of the blade tip, the high temperature of the thermal spraying beam flow and the large impact force. The traditional way is to use adhesive tape, but due to the high temperature, the adhesive tape will appear phenomena such as overheating, burning, unstable pasting and the like, thereby causing the spraying surface to be contaminated or the non-spraying area to be over-sprayed. At the same time, the adhesive tape is a one-time protection, and the adhesive tape needs to be pasted before each spraying and removed after the spraying is completed, which not only wastes the cost, but also reduces the spraying efficiency of the blade, and therefore a special protection tool is urgently needed to protect the blade tip. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a compressor rotor blade tip strengthened coating spraying protection tool and an installation method.

[0005] The present application achieves the above-mentioned purpose by the following technical scheme: a compressor rotor blade tip strengthened coating spraying protection tool, comprising a base and a protection clamping unit installed on the base; the protection clamping unit comprises a mounting seat, a limiting assembly and a shielding assembly; the mounting seat is arranged on the base; the limiting assembly is used for clamping and fixing the blade; the shielding assembly is arranged on one side of the limiting assembly; the shielding assembly is used for shielding the non-spraying area on the blade; and the shielding assembly is slidingly arranged on the mounting seat to adjust the gap between the shielding assembly and the blade.

[0006] Further, the limiting assembly comprises a shell, a lifting mechanism, a limiting part and a mounting part; the top of the shell is provided with a lifting groove; the lifting mechanism drives the limiting part to move up and down in the lifting groove to lock or unlock the blade tenon; the mounting part is arranged on both sides of the top of the lifting groove; and the mounting part is used for slidingly mounting the blade.

[0007] Further, a limiting groove is arranged on the limiting part; wedge surfaces are arranged on both side walls of the limiting groove corresponding to the blade tenon; the wedge surfaces are used to press the blade tenon downward;

[0008] Further, a positioning pin is further installed in the lifting groove; a through hole is arranged on the limiting part corresponding to the positioning pin;

[0009] Further, a stepped groove is arranged on the side wall of the mounting part corresponding to the blade edge plate; the stepped groove is used to slide and clamp the blade edge plate;

[0010] Further, the lifting mechanism comprises a lever, a lever seat and a lifting rod; the lifting rod is arranged in the shell and the upper end of the lifting rod extends out of the shell and is connected with the limiting part; the lever is hingedly arranged on the lever seat; one end of the lever extends into the shell and abuts against the lower end of the lifting rod; a spring is further sleeved on the lifting rod;

[0011] Further, a flange part is arranged on the bottom of the lifting rod; the lower end of the spring abuts against the flange part; the upper end of the spring abuts against the top of the shell;

[0012] Further, the shielding assembly comprises a sliding seat, a support frame and a baffle; the sliding seat is slidably installed on the base through a sliding groove; a fixing member is arranged on the sliding seat; the baffle is arranged on the sliding seat through the support frame;

[0013] Further, the protection clamping unit comprises a plurality of units and is arranged on the base.

[0014] The application further provides a method for spraying and protecting a compressor rotor blade tip strengthening coating, which adopts the above protection tool and comprises the following steps:

[0015] 1) press the lever downward, the lever lifts the limiting part to move upward in the lifting groove to a position;

[0016] 2) slide and clamp the blade edge plate along the stepped groove on the mounting part, after sliding to a position, make the blade edge plate be located on the stepped groove, and the blade tenon extends into the limiting groove of the limiting part;

[0017] 3) loosen the lever, the spring drives the limiting part downward, the wedge surface of the limiting part is pressed on the upper surface of the blade tenon, and the blade is locked;

[0018] 4) slide the sliding seat of the shielding assembly, adjust the gap between the baffle and the blade, and after adjusting to a position, fix the position of the sliding seat by the fixing member;

[0019] 5) repeat steps 1) to 4), and sequentially arrange and install a plurality of protection clamping units on the base.

[0020] The application has the following advantages:

[0021] 1. The base is provided with a protection clamping unit, the mounting seat of the protection clamping unit is arranged on the base, the limiting assembly and the shielding assembly are arranged on the mounting seat, the blade can be locked and positioned through the limiting assembly, the blade can be stably installed, and the blade can withstand a large spraying impact force, and after the blade is fixed through the limiting assembly, the freedom of the blade in six directions is completely limited, and the blade cannot rotate or move during spraying;

[0022] 2. The non-spraying area on the blade can be shielded and protected through the shielding assembly, the shielding assembly is slidably arranged on the mounting seat, so that the angle between the top baffle of the shielding assembly and the spraying beam can be adjusted, so that part of the lower part of the blade body can be protected, and the non-spraying area is also attached to the spraying particles;

[0023] 3. Preferably, a plurality of protection clamping units are arranged on the base, the protection clamping units can be expanded according to the number of blades, and the template can be arranged in a ring shape or a straight line according to the number of blades and spraying requirements for spraying;

[0024] 4. Preferably, the limiting assembly comprises a shell, a lifting mechanism, a limiting portion and a mounting portion, during the process that the blade withstands a large spraying impact force, the wedge surface on the limiting portion is pressed downward to the blade tenon due to the action of the lifting mechanism in the vertical direction, so that the blade rim plate is always pressed on the mounting portion, and the step-shaped groove on the mounting portion limits the movement and rotation of the blade in the horizontal direction, so that the freedom of the blade in six directions is completely limited after being fixed, and it is ensured that the blade can withstand a large spraying impact force;

[0025] 5. Preferably, the lifting drive of the lifting mechanism adopts a lever structure, so that the installation, disassembly, locking and unlocking of the blade are very convenient, only the lever needs to be operated during the process, the blade can be installed or removed, the process is avoided to be complicated due to the use of screws and other structures for fixing during the design process of the tooling, the clamping time is saved, and the clamping efficiency is improved;

[0026] 6. Preferably, the shielding effect of spraying is fully considered during the design process, a profiled baffle is designed near the upper position of the blade tip, and the profiled baffle is installed through a support frame, so that the protection of other non-spraying areas of the blade body is realized, tooling material is saved, and the weight of the tooling is reduced; the sliding seat of the shielding assembly is connected with the base through sliding, for example, through a sliding groove, after being slid in place, the shielding assembly is fixed through a fixing member, for example, a screw, after the fixing screw is removed, the gap between the shielding assembly and the blade can be adjusted by moving the shielding assembly forward and backward; the shielding assembly can only move forward and backward in the sliding groove, and cannot move left and right or rotate, so that the consistency during the adjustment of the shielding gap is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 Figure 1 is a structural schematic diagram of the present application.

[0028] Fig. 2 Figure 2 is a structural schematic diagram of the protection clamping unit.

[0029] Fig. 3 Figure 3 is a structural schematic diagram of the protection clamping unit when it does not clamp the blade.

[0030] Fig. 4 Figure 4 is a sectional view of the protection clamping unit when it clamps the blade.

[0031] Fig. 5 Figure 5 is a structural schematic diagram of the limiting part.

[0032] Fig. 6 Figure 6 is a schematic diagram of the installation of the installation part.

[0033] In the figure, 1. Base; 2. Protection clamping unit; 3. Mounting seat; 4. Limiting assembly; 5. Shielding assembly; 6. Blade; 7. Shell; 8. Lifting mechanism; 81. Lever; 82. Lever seat; 83. Lifting rod; 84. Spring; 85. Flange part; 9. Limiting part; 10. Installation part; 11. Lifting groove; 12. Limiting groove; 13. Wedge surface; 14. Positioning pin; 15. Through hole; 16. Step groove; 17. Slide seat; 18. Support frame; 19. Baffle; 20. Fixing piece. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0037] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Example 1: As Figs. 1 to 6 As shown, a protective tooling for spraying a reinforced coating on the tip of a compressor rotor blade 6 includes a base 1 and a protective clamping unit 2 mounted on the base 1. The protective clamping unit 2 includes a mounting base 3, a limiting component 4, and a shielding component 5. The mounting base 3 is disposed on the base 1. The limiting component 4 is used to clamp and fix the blade 6. The shielding component 5 is disposed on one side of the limiting component 4. The shielding component 5 is used to shield the non-sprayed area on the blade 6. The shielding component 5 is slidably disposed on the mounting base 3 to adjust the gap between it and the blade 6. In this embodiment, by setting the protective clamping unit 2 on the base 1, and the mounting base 3 of the protective clamping unit 2 is disposed on the base 1, the limiting component 4 and the shielding component 5 are mounted on the mounting base. The limiting component 4 can lock and position the blade 6, so that the blade 6 can be stably installed and can withstand a large spraying impact force. After the blade 6 is fixed by the limiting component 4, the blade 6's freedom in six directions is completely restricted, and it will not rotate or move during spraying. The shielding component 5 can shield and protect the non-sprayed areas on the blade 6. The shielding component 5 is slidably mounted on the mounting base 3, so that the angle between the top baffle 19 of the shielding component 5 and the spray beam can be adjusted, thereby protecting the lower part of the blade 6 and preventing spray particles from adhering to the non-sprayed areas.

[0041] The limiting assembly 4 comprises a shell 7, a lifting mechanism 8, a limiting part 9 and a mounting part 10; the top of the shell 7 is provided with a lifting groove 11; the lifting mechanism 8 drives the limiting part 9 to move up and down in the lifting groove 11 to lock or unlock the tenon of the blade 6; the mounting part 10 is arranged on both sides of the top of the lifting groove 11; the mounting part 10 is used for slidingly mounting the blade 6;

[0042] The limiting assembly 4 comprises a shell 7, a lifting mechanism 8, a limiting part 9 and a mounting part 10, in the process of the blade 6 bearing a larger spraying impact force, in the vertical direction, due to the action of the lifting mechanism 8, the limiting part 9 can press the tenon of the blade 6 downwardly, so that the edge plate of the blade 6 is always pressed on the mounting part 10, in the horizontal direction, the mounting part 10 limits the movement and rotation of the blade 6 in the plane direction, so that the degree of freedom of the blade 6 in six directions is completely limited after being fixed, which ensures that the blade 6 can bear a larger spraying impact force;

[0043] The limiting part 9 is provided with a limiting groove 12; the two side walls of the limiting groove 12 are provided with wedge surfaces 13 corresponding to the tenon of the blade 6; the wedge surfaces 13 are used for pressing the tenon of the blade 6 downwardly; the limiting groove 12 can make the tenon of the blade 6 enter the limiting groove 12 when the blade 6 is slidingly mounted, when the limiting part 9 is downwardly pressed, the wedge surfaces 13 can press the tenon of the blade 6, so that the blade 6 can be locked in the vertical direction.

[0044] The lifting groove 11 is also provided with a positioning pin 14; the limiting part 9 is provided with a through hole 15 corresponding to the positioning pin 14; the through hole 15 is slidingly arranged through the through hole 15, so that the limiting part 9 can stably move up and down along the lifting groove 11, and the shaking is reduced.

[0045] The side wall of the mounting part 10 is provided with a stepped groove 16 corresponding to the edge plate of the blade 6; the stepped groove 16 is used for slidingly clamping the edge plate of the blade 6; the stepped groove 16 facilitates the sliding clamping of the edge plate of the blade 6, after being slidingly clamped in place, the tenon of the blade 6 extends into the lifting groove 11 and is vertically locked by the limiting part 9, at this time, the edge plate of the blade 6 can also be tightly pressed on the stepped groove 16, avoiding the movement and rotation in the horizontal direction.

[0046] The lifting mechanism 8 comprises a lever 81, a lever seat 82 and a lifting rod 83; the lifting rod 83 is arranged in the shell 7, and the upper end of the lifting rod 83 extends out of the shell 7 and is connected with the limiting part 9; the lever 81 is hingedly arranged on the lever seat 82; one end of the lever 81 extends into the shell 7 and abuts against the lower end of the lifting rod 83; in this embodiment, the lifting drive of the lifting mechanism 8 adopts the lever 81 structure, so that the mounting and dismounting, locking and unlocking of the blade 6 are very convenient, and only the lever 81 needs to be operated in the process, so that the blade 6 can be mounted or removed, avoiding the use of screws and other structures for fixing in the tooling design process, saving clamping time and improving clamping efficiency; the lever 81 is pressed downward, and the one end extending into the shell 7 is raised upward by the hinging action of the lever seat 82, so that the lifting rod 83 can be lifted to drive the lifting rod 83 to lift the limiting part 9; at this time, the spring 84 on the lifting rod 83 is deformed by extrusion to generate elastic potential energy; the lever 81 is released, the spring 84 is reset, the limiting part 9 is driven downward, and the wedge surface 13 on the limiting part 9 falls on the tenon of the blade 6 and is pressed tightly to complete the locking of the blade 6.

[0047] The bottom of the lifting rod 83 is provided with a flange part 85; the lower end of the spring 84 abuts against the flange part 85; the upper end of the spring 84 abuts against the top of the shell 7; in this embodiment, the flange part 85 is beneficial to the abutment of the lower end of the spring 84, so that the spring 84 can be extruded upward when the lifting rod 83 is lifted, so that the spring 84 is compressed on the upper part of the shell 7, and the spring 84 is reset when the lever 81 is released, which is beneficial to the downward movement of the lifting rod 83.

[0048] The shielding assembly 5 comprises a sliding seat 17, a support frame 18 and a baffle 19; the sliding seat 17 is slidingly installed on the base 1 through a sliding groove; the sliding seat 17 is provided with a fixing part 20; the baffle 19 is arranged on the sliding seat 17 through the support frame 18; in this embodiment, the shielding effect of spraying is fully considered in the design process, the profiled baffle 19 is designed near the upper position of the blade tip, and is installed through the support frame 18, so that the protection of other non-spraying areas of the blade body is realized, the tooling material is saved, and the tooling weight is reduced; the sliding seat 17 of the shielding assembly 5 is slidingly connected with the base 1, for example through a sliding groove, and is fixed after sliding into position through a fixing part 20, for example a screw; after the fixing screw is removed, the gap between the shielding assembly 5 and the blade 6 can be adjusted by moving the shielding assembly 5 forward and backward; the sliding in the sliding groove limits the shielding assembly 5 to move forward and backward only, and cannot move left and right or rotate, effectively ensuring the consistency in the shielding gap adjustment process.

[0049] The protection clamping unit 2 comprises a plurality of units arranged on the base 1; in the embodiment, a plurality of protection clamping units 2 are arranged on the base 1, which can be expanded according to the number of the blades 6, and the template can be arranged in a ring shape or a linear shape for spraying according to the number of the blades 6 and spraying requirements.

[0050] Embodiment 2: A protection installation method for a compressor rotor blade 6 tip strengthening coating, the protection tool described in embodiment 1; and comprising the following steps:

[0051] 1) press down the lever 81, the lever 81 lifts the limiting part 9 in the lifting groove 11 to move upward to the position;

[0052] 2) slide the blade 6 edge plate into the step-shaped groove 16 on the mounting part 10, after sliding to the position, the blade 6 edge plate is located on the step-shaped groove 16, and the blade 6 tenon is inserted into the limiting groove 12 of the limiting part 9;

[0053] 3) loosen the lever 81, the spring 84 drives the limiting part 9 downward, the wedge surface 13 of the limiting part 9 is pressed on the upper surface of the blade 6 tenon, and the blade 6 is locked;

[0054] 4) slide the sliding seat 17 of the shielding assembly 5, adjust the gap between the baffle 19 and the blade 6, and fix the position of the sliding seat 17 after adjusting to the position;

[0055] 5) repeat steps 1) to 4), and arrange and install a plurality of protection clamping units 2 on the base 1 in sequence.

[0056] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tooling for spraying a protective coating to reinforce the tips of compressor rotor blades, characterized in that: The system includes a base and a protective clamping unit mounted on the base. The protective clamping unit includes a mounting seat, a limiting component, and a shielding component. The mounting seat is disposed on the base. The limiting component clamps and fixes the blade. The shielding component is disposed on one side of the limiting component and shields the non-painted area on the blade. The shielding component is slidably mounted on the mounting seat to adjust the gap between it and the blade. The limiting component includes a housing, a lifting mechanism, a limiting part, and a mounting part. The top of the housing has a lifting groove. The lifting mechanism drives the limiting part to move up and down within the lifting groove. The mechanism includes a lever, a lever seat, and a lifting rod. The lifting rod is installed on both sides of the top of the lifting groove. The mounting part is used to slide the blade. The limiting part is provided with a limiting groove. The two side walls of the limiting groove are provided with wedge-shaped surfaces corresponding to the lower edge of the blade. The wedge-shaped surfaces are used to press the blade tenon downward. The lifting mechanism includes a lever, a lever seat, and a lifting rod. The lifting rod is installed inside the housing and the upper end of the lifting rod extends out of the housing and connects with the limiting part. The lever is hinged to the lever seat. One end of the lever extends into the housing and abuts against the lower end of the lifting rod. A spring is also fitted on the lifting rod.

2. The compressor rotor blade tip strengthening coating spraying protective tooling according to claim 1, characterized in that: The lifting groove is also equipped with a positioning pin; the limiting part is provided with a through hole corresponding to the positioning pin.

3. The compressor rotor blade tip strengthening coating spraying protective tooling according to claim 1, characterized in that: The side wall of the mounting part is provided with a stepped groove corresponding to the blade edge plate; the stepped groove is used to slide and engage with the blade edge plate.

4. The compressor rotor blade tip strengthening coating spraying protective tooling according to claim 1, characterized in that: The bottom of the lifting rod is provided with a flange; the lower end of the spring abuts against the flange; the upper end of the spring abuts against the top of the housing.

5. The compressor rotor blade tip strengthening coating spraying protective tooling according to claim 4, characterized in that: The shielding assembly includes a slide, a support frame, and a baffle; the slide is slidably mounted on the base via a sliding groove; a fixing element is provided on the slide; and the baffle is mounted on the slide via the support frame.

6. The compressor rotor blade tip strengthening coating spraying protective tooling according to claim 5, characterized in that: The protective clamping unit comprises several units arranged on the base.

7. A method for spraying and protecting the tip of a compressor rotor blade with a reinforcing coating, characterized in that: The protective tooling described in any one of claims 1-6 is employed, and includes the following steps: 1) Press down the lever, and the lever will lift the limiting part and move it upward into place within the lifting groove; 2) Slide the blade edge plate into the stepped groove on the mounting part. After sliding into place, the blade edge plate is positioned on the stepped groove, and the blade tenon extends into the limiting groove of the limiting part. 3) Release the lever, the spring will drive the limiting part downward, and the wedge-shaped surface of the limiting part will press against the surface of the blade tenon to lock the blade; 4) Slide the slide block of the sliding block assembly, adjust the gap between the baffle and the blade, and fix the slide block position with the fixing parts after adjustment. 5) Repeat steps 1) to 4) to install several protective clamping units in sequence on the base.

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