Cold spraying protection device for tenon of air compressor blade of aero-engine

Abstract

In order to solve the technical problems that an existing blade tenon spraying protection tool is not suitable for tenon bottom face spraying and a blade base body is prone to being scratched, the utility model provides the aero-engine compressor blade tenon cold spraying protection device. The blade tenon protection device comprises the sliding check block and the adjustable check block which are used for protecting the long side wall and the short side wall of the blade tenon respectively, and the protection requirement for a non-spraying area when the bottom face of the blade tenon is sprayed can be met. Moreover, a sealing rubber strip is arranged on the contact surface of the sliding stop block and the long side wall of the blade tenon, and a sealing rubber strip is arranged on the contact surface of the adjustable stop block and the short side wall of the blade tenon, so that the clamping and protection effects can be achieved through the sealing rubber strips, and the risk that the blade tenon is scratched due to clamping is avoided.

Description

Technical Field

[0001] This utility model relates to a cold spray protection device, and more particularly to a cold spray protection device for the tenon of an aero-engine compressor blade. Background Technology

[0002] Compressor blades are core components of aero engines, assembled and installed via tenons on the blade and tenons on the engine disk. To improve the efficiency of compressor blades and maximize air pressure, engineers often use aluminum or titanium alloys, which have low density, high specific strength, and good corrosion resistance, as the raw materials for the blades. However, during service, the intense vibrations transmitted by the engine cause fretting wear between the bottom surface of the tenon and the tenon of the aluminum or titanium alloy blades. This leads to problems such as installation dimensions not meeting usage requirements. Excessive installation clearance can cause rotor failure, or even blade breakage that damages the entire engine.

[0003] Cold spray additive manufacturing is a new type of surface coating technology that has been developed in recent years. It involves spraying particles that collide with the substrate in a solid state and undergo intense plastic deformation to deposit and form a coating without producing a thermal effect on the substrate material.

[0004] This is the first time that cold spray technology has been used to additively repair the tenon of a certain type of engine blade. By protecting the non-sprayed areas and then spraying repair coating on the worn tenon bottom surface, the service life of the blade can be extended, significantly reducing equipment maintenance costs. However, to ensure good aerodynamic performance of the compressor, compressor blades are usually divided into multiple stages of blades of different sizes, such as... Figure 1 As shown, the shapes and sizes of the tenons vary, making it difficult to protect the non-painted areas. Using existing methods (high-temperature tape) not only fails to guarantee the consistency of the painted areas, but also requires post-treatment of the tape, posing a risk of scratching the tenons, while consuming a lot of manpower and resources.

[0005] Invention patent CN 110433979A proposes a protective clamp for spraying tenons of blades and its manufacturing method, including a support plate clamp, a pressure handle, a spring, etc. It designs a clamp-like protective clamp that achieves spraying of the tenon sidewall by setting a spraying window in the clamping area. However, the solution in this patent has certain drawbacks: 1. This design is not universal; different sizes of clamps and spraying windows of different specifications need to be designed for tenons of different lengths; 2. This design is only suitable for spraying the long sidewall area of ​​the tenon, and cannot be used for spraying the bottom surface of the tenon; 3. This design involves direct rigid contact between the clamping protection and the tenon, which can easily cause scratches on the blade substrate material.

[0006] Invention patent CN 107626494A proposes a blade tenon spraying positioning and protection fixture, including an L-shaped protective plate with an adaptable surface matching the non-sprayed area of ​​the blade tenon and an airfoil protective plate with an adaptable surface matching the waist of the blade tenon, thereby protecting the non-sprayed area. However, similar to patent CN 110433979A, this design has poor versatility, requiring multiple fixtures to be designed for multi-stage compressor blades; furthermore, this design is also only applicable to spraying the long sidewall area of ​​the tenon, and without clamping protection, it is prone to scratching the blade substrate material. Utility Model Content

[0007] To address the technical problems of existing blade tenon spraying protection fixtures being unsuitable for spraying the bottom surface of the tenon and easily scratching the blade substrate, this utility model provides a cold spraying protection device for the tenon of aero-engine compressor blades.

[0008] The technical solution adopted in this utility model is:

[0009] A cold spray coating protection device for the tenon of an aero-engine compressor blade is characterized by comprising a fixed base, a sliding block, an adjustable block, and a sliding bolt.

[0010] The fixed base has a central groove for the blade tenon to pass through. The upper surface of the fixed base and both sides along the length of the central groove are provided with sliding grooves for installing the sliding block. A fixing block with a threaded hole is provided at the center of each of the four sides of the upper surface of the fixed base.

[0011] There are two sliding blocks, which are set in the groove and can slide along the groove; the two sliding blocks are respectively located on both sides of the central groove, and are used to press and protect the long side wall of the blade tenon installed in the central groove; the side wall of the sliding block used to press the blade tenon is provided with a sealing strip that plays a pressing and protective role; the side wall of the sliding block opposite to the blade tenon is provided with a first threaded hole, which is a stepped blind hole;

[0012] There are two adjustable stops, which are disposed between the two sliding stops and can move between the two sliding stops. The two adjustable stops are located on both sides of the central groove and are used to press and protect the short sidewall of the blade tenon installed in the central groove. The sidewall of the adjustable stop used to press the blade tenon is provided with a sealing strip that plays a pressing and protective role. The sidewall of the adjustable stop away from the blade tenon is provided with a second threaded hole, which is a stepped blind hole.

[0013] There are two sets of sliding bolts, two in each set; the first set of sliding bolts passes through the two fixed blocks in the width direction of the fixed base and then screws into the first threaded hole on the side wall of the sliding block; the second set of sliding bolts passes through the two fixed blocks in the length direction of the fixed base and then screws into the second threaded hole on the side wall of the adjustable block; by rotating the first set of sliding bolts and the second set of sliding bolts, the sliding block and the adjustable block can be moved respectively, so as to realize the positioning, clamping and protection of the blade tenon side wall.

[0014] Furthermore, the groove is a T-shaped groove with a T-shaped cross-section, and the length direction of the T-shaped groove is parallel to the width direction of the central groove.

[0015] Furthermore, the sliding block includes a long strip-shaped block body and two sliders disposed at the bottom of the long strip-shaped block body; the long strip-shaped block body has a first rectangular groove and a second rectangular groove arranged vertically on the side wall for pressing the blade tenon, and a sealing strip for pressing and protecting is bonded in the first rectangular groove; the sliders are installed in the T-shaped groove;

[0016] The adjustable stop includes an adjustable stop body; the adjustable stop body is a parallelepiped structure with parallelograms on both the top and bottom surfaces. In this parallelepiped structure, a sealing strip for pressing and adhering to the short sidewall surface of the blade tenon is attached to one side, and a boss is provided on two opposite sides of the other three sides. The second threaded hole is provided in the middle of the remaining side. The boss is adapted to the second rectangular groove on the sidewall of the sliding stop. The angle between the side where the sealing strip is located and the bottom surface is equal to the angle between the short sidewall of the blade tenon and the horizontal plane. The angle between the side where the sealing strip is located and the side where the boss is located is equal to the angle between two adjacent sides of the bottom surface of the blade tenon. This allows the sidewall of the parallelepiped structure to adapt to the short sidewall surface of the blade tenon to be protected, thereby pressing and adhering to the short sidewall surface of the blade tenon.

[0017] Furthermore, multiple sets of sliding blocks are pre-set, with two blocks in each set; the length of each set of sliding blocks can cover the length of the long sidewall of the tenon of each level of blade, and the height of each set of sliding blocks matches the height of the long sidewall of the tenon of each level of blade. The appropriate sliding block is selected for use according to the size parameters of the long sidewall of the tenon of the blade. Multiple sets of adjustable blocks are pre-set, with two blocks in each set; the multiple sets of adjustable blocks are respectively used to match the short sidewall of the tenon of different levels of blade. The appropriate adjustable block is selected for use according to the size parameters of the short sidewall of the tenon of the blade. The two adjustable blocks belonging to the same set are arranged between the two sliding blocks, and the boss on them is located in the second rectangular groove.

[0018] Furthermore, rolling bearings are provided on both opposite sidewalls of the slider.

[0019] Furthermore, the sliding bolt has a smooth rod structure after the first n threads; n≥3; the first threaded hole and the second threaded hole are both stepped blind holes, the side wall of the step is a threaded hole that matches the thread of the sliding bolt, and the rest of the part is unthreaded; when the threaded section of the sliding bolt in front of the smooth rod structure is completely screwed into the threaded hole in the stepped blind hole, the smooth rod structure of the sliding bolt is located in the threaded hole in the stepped blind hole and can slide in it, so that the sliding stop and the sliding bolt, and the adjustable stop and the sliding bolt are rotated and separated.

[0020] Furthermore, the bottom edges of the central groove are chamfered.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model includes a sliding stop and an adjustable stop for protecting the long and short sidewalls of the blade tenon, respectively, which can meet the protection requirements for non-sprayed areas during spraying of the bottom surface of the blade tenon. Furthermore, this utility model provides sealing strips on the contact surfaces of the sliding stop and the long sidewall of the blade tenon, and on the contact surfaces of the adjustable stop and the short sidewall of the blade tenon. These sealing strips provide clamping and protection, avoiding the risk of scratches to the blade tenon due to clamping.

[0023] 2. In this invention, the length of the sliding stop can cover the length of the long sidewall of the tenon at each stage of the blade, thus providing compression protection to the long sidewall. Multiple sets of adjustable stops are available, each adapted to the length W and angle α of the short sidewall of the tenon at each stage of the blade. By replacing adjustable stops of different sizes, compression protection can be provided to the short sidewall of the tenon at different stages of the blade. Therefore, this invention has strong versatility and is suitable for spraying protection of the long and short sidewalls of the tenon of compressor blades of different sizes at multiple stages. It effectively avoids a series of problems caused by existing technologies (high-temperature tape), effectively improving equipment repair efficiency, extending blade service life, and significantly reducing equipment maintenance costs. It has high practical value in the maintenance of aviation equipment.

[0024] 3. This utility model has a simple structure, is easy to manufacture, and is easy to operate. Attached Figure Description

[0025] Figure 1 Schematic diagram of additive blade awaiting cold spraying;

[0026] Figure 2 This is a schematic diagram of the structure of the blade tenon cold spray protection device of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the fixed base in this utility model; wherein, (a) is a three-dimensional representation. Figure 1 (b) is a three-dimensional object. Figure 2 (Bottom side up);

[0028] Figure 4 This is a schematic diagram of the sliding stop in this utility model;

[0029] Figure 5 This is a schematic diagram of the adjustable stop block in this utility model;

[0030] Figure 6 This is a schematic diagram of the sliding bolt in this utility model;

[0031] Figure 7 This is a schematic diagram of the first threaded hole and the second threaded hole in this utility model.

[0032] Figure label:

[0033] 1-Fixed base; 101-Slot; 102-T-slot; 103-Fixing block; 1031-Threaded hole;

[0034] 2-Sliding stop; 201-Elongated stop body; 202-Slider; 203-First rectangular groove; 204-Second rectangular groove; 205-First threaded hole;

[0035] 3-Adjustable stop block; 301-Adjustable stop block body; 302-Boss; 303-Second threaded hole;

[0036] 4-Sliding bolt; 401-Smooth rod structure;

[0037] 5-Connecting rod;

[0038] 6-Rolling bearing;

[0039] 7-blade;

[0040] 8-Sealing strip;

[0041] 9 - Surface to be coated; Detailed Implementation

[0042] like Figure 1 As shown, after a certain service life, the bottom surface of the blade tenon will experience micro-wear, resulting in excessive clearance between it and the tenon groove. Repair requires cold spraying additive manufacturing on the bottom surface of the tenon (surface 9 to be coated). This invention provides a device for clamping and protecting the long and short sidewalls of the tenon during cold spraying additive manufacturing repair of the blade tenon bottom surface.

[0043] The present invention will now be described in detail with reference to the accompanying drawings.

[0044] like Figure 2 As shown, the cold spray coating protection device for the tenon of the aero-engine compressor provided by this utility model includes a fixed base 1, a sliding block 2, an adjustable block 3, a sliding bolt 4, a connecting rod 5, and a rolling bearing 6.

[0045] like Figure 3 As shown, a central groove 101 is provided in the center of the fixed base 1. The length and width of the central groove 101 should be sufficient to accommodate the tenons of multiple blades. Furthermore, the edges of the central groove 101 are chamfered at the bottom of the fixed base 1 to ensure that the free-form blade does not interfere with the fixed base 1. T-shaped grooves 102 with a T-shaped cross-section are provided on both sides of the upper surface of the fixed base 1 along the length of the central groove 101. The length direction of the T-shaped grooves 102 is parallel to the width direction of the central groove 101. The T-shaped grooves 102 are used to place the sliding stop 2. Simultaneously, four fixing blocks 103 are also provided on the upper surface of the fixed base 1, distributed on the four sides of the fixed base 1. Each fixing block 103 has a threaded hole 1031 for installing the sliding bolt 4.

[0046] like Figure 4 As shown, the sliding block 2 includes a long strip-shaped block body 201 and two sliders 202 disposed at the bottom of the long strip-shaped block body 201. Two first rectangular grooves 203 and second rectangular grooves 204, arranged vertically and horizontally, are formed on one side wall of the long strip-shaped block body 201. A sealing strip 8, which provides compression and protection, is adhered in the upper first rectangular groove 203 (to provide protection, the thickness of the sealing strip should be greater than the groove depth and protrude outwards). The lower second rectangular groove 204 is adapted to accommodate a boss 302 on the side wall of the adjustable block 3. A first threaded hole 205 (not a through hole) is provided in the middle of the other side wall of the long strip-shaped block body 201, which is used to mate with a sliding bolt 4. Rolling bearings 6 are provided on the two opposite side walls of the slider 202. The rolling bearings 6 are installed on the slider 202 through the connecting rod 5. After assembly, the elongated block body 201 is located above the fixed base 1 and is perpendicular to the two T-slots 102 on the fixed base 1. The two sliders 202 and the corresponding rolling bearings 6 are located in the two T-slots 102 on the fixed base 1 and can slide in the T-slots 102. Through the cooperation of the slider 202, the rolling bearings 6 and the T-slots 102, the sliding block can slide along the T-slots 102.

[0047] like Figure 5As shown, the adjustable stop 3 includes an adjustable stop body 301, a boss 302, and a second threaded hole 303. The adjustable stop body 301 is a parallelepiped structure with parallelogram-shaped upper and lower surfaces. In the parallelepiped structure, a sealing strip 8 for pressing and fitting the short sidewall surface of the blade tenon is attached to one side, and a boss 302 is provided on two opposite sides of the other three sides. The boss 302 is adapted to the second rectangular groove 204 on the sidewall of the sliding stop 2. The sealing strip 8... The angle between the side and the bottom is equal to the angle between the short sidewall of the blade tenon and the horizontal plane. The angle between the surface of the sealing strip 8 and the side of the boss 302 is equal to the angle between two adjacent sides of the bottom surface of the blade tenon. This allows the sidewall of the parallelepiped structure to fit the surface of the short sidewall of the blade tenon to be protected, thus pressing it tightly against the surface of the short sidewall of the blade tenon. A second threaded hole 303 (non-through hole) is provided in the middle of the remaining sidewall of the parallelepiped structure. This second threaded hole 303 is used to cooperate with the sliding bolt 4.

[0048] like Figure 6 As shown, the sliding bolt 4 has a smooth rod structure 401 with an axial length of 10mm after the first 3 threads.

[0049] like Figure 7 As shown, the first threaded hole 205 and the second threaded hole 303 are staged blind holes. The stepped sidewall has a threaded hole 3031 that mates with the thread of the sliding bolt 4; the remaining portion is unthreaded. After the first three turns of the sliding bolt 4 are fully screwed into the threaded hole, the subsequent smooth rod structure 401 can slide at the threaded hole 3031, allowing the sliding stop 2 and the sliding bolt 4, and the adjustable stop 3 and the sliding bolt 4, to rotate and separate, preventing jamming when tightening the sliding bolt 4. Figure 2 As shown, there are two sliding blocks 2 and two adjustable blocks 3. The two sliding blocks 2 have sidewalls of a first rectangular groove 203 and a second rectangular groove 204 facing each other. The two adjustable blocks 3 are both located between the two sliding blocks 2. The protrusions 302 on the sidewalls of the adjustable blocks 3 are all placed in the second rectangular grooves 204 on the sidewalls of the sliding blocks 2. The adjustable blocks 3 can slide between the two sliding blocks 2 through the cooperation of the protrusions 302 and the second rectangular grooves 204. There are four sliding bolts 4, arranged in pairs. The first pair of sliding bolts 4 are screwed into the two fixing blocks 103 on the long side of the fixed base 1, and their first three threads are screwed into the first threaded hole 205 on the side wall of the sliding block 2. Their smooth rod structure 401 can slide at the threaded hole 3031. The second pair of sliding bolts 4 are screwed into the two fixing blocks 103 on the short side of the fixed base, and their first three threads are screwed into the second threaded hole 303 on the side wall of the adjustable block 3. Their smooth rod structure 401 can slide at the threaded hole 3031.

[0050] When the threaded sections of the two sliding bolts 4 in the first group, located at the front end of the smooth rod structure 401, are fully screwed into the first threaded hole 205, and the smooth rod structure 401 is located within the threaded hole 2051, rotating the two sliding bolts 4 in the first group causes them to move linearly relative to the fixed block 103 on the long side of the fixed base 1. The threaded structures on both sides of the smooth rod structure 401 can drive (push / pull) the two sliding blocks 2 to move along the T-slot 102 on the fixed base 1; when the threaded sections of the two sliding bolts 4 in the second group, located at the front end of the smooth rod structure 401... When the threaded section is fully screwed into the second threaded hole 303 and the smooth rod structure 401 is located in the threaded hole 3031, the two sliding bolts 4 of the second set are rotated to make them move linearly relative to the fixed block 103 on the short side of the fixed base 1. The threaded structures on both sides of the smooth rod structure 401 can drive (push / pull) the two adjustable blocks 3 to move along the second rectangular groove 204 on the side wall of the two sliding blocks 2. Thus, the sliding blocks 2, the adjustable blocks 3 and the sealing strip 8 work together to achieve the positioning and clamping of the blade tenon side wall.

[0051] As can be seen from the above process, the purpose of machining the smooth rod structure 401 on the sliding bolt 4 is to achieve the rotational separation of the sliding bolt 4 from the sliding stop 2 and the sliding bolt 4 from the adjustable stop 3. Therefore, the length of the smooth rod structure 401 only needs to meet this requirement; 10mm in this embodiment is just an example. The first three threads at the front end of the smooth rod structure 401 are mainly used to pull the sliding stop 2 and the adjustable stop 3 when the sliding bolt 4 is unscrewed. Therefore, the machining position of the smooth rod structure 401 only needs to meet this requirement, taking into account the axial dimensions of the stepped threaded blind holes on the sliding stop 2 and the adjustable stop 3. Machining the smooth rod structure 401 after the third thread in this embodiment is just an example.

[0052] In this invention, the length of the sliding stop 2 is sufficient to cover the length of the long sidewall of the blade tenon at various levels. Simultaneously, multiple sets of the sliding stop 2 can be pre-set according to the height of the long sidewall of the blade tenon at different levels, thus achieving compression protection of the long sidewall of the blade tenon at various levels. Multiple sets of the adjustable stop 3 can be pre-set according to the changes in the length W and angle α of the short sidewall of the blade tenon at different levels. Compression protection of the short sidewall of the blade tenon at different levels can be achieved simply by replacing the adjustable stop 3, improving the versatility of the device. When the adjustable stop 3 needs to be removed for replacement, it can be squeezed tightly by hand in a free state, and then the two sliding bolts 4 of the first set can be rotated to increase the distance between the sliding stop 2, at which point the adjustable stop 3 can be removed.

[0053] How to use this utility model:

[0054] 1. Place the blade tenon to be painted with its bottom surface facing up into the center groove 101 from the bottom of the fixed base 1.

[0055] 2. Rotate the two sliding screws 4 of the first group, causing the two sliding blocks 2 to move slowly towards the center simultaneously, intersecting with the two long sidewalls of the tenon (such as...). Figure 1 As shown, the distance L is in contact with and pre-tightened, while ensuring that the two protrusions 302 on the side wall of the adjustable stop 3 enter the second rectangular grooves 204 on the side wall of the two sliding stops 2 respectively.

[0056] 3. Rotate the two sliding screws 4 of the second group, causing the two adjustable stops 3 to move slowly towards the center simultaneously, intersecting with the two short sidewalls of the tenon (such as...). Figure 1 As shown, the distance of W is in contact with and pre-tightened.

[0057] 4. To provide protection, the sealing strips on the sliding block 2 and the adjustable block 3 will protrude outward in the thickness direction (preferably, 0.5mm outward). At this time, the sliding screw 4 needs to be tightened to ensure the axial and radial positioning and clamping of the tenon sidewall.

[0058] 5. After the blade tenon is positioned and protected, the cold spraying process can be carried out.

Claims

1. An aeroengine compressor blade tenon cold spray protection device, characterized by: Includes a fixed base, a sliding stop, an adjustable stop, and a sliding bolt; The fixed base has a central groove for the blade tenon to pass through. The upper surface of the fixed base and both sides along the length of the central groove are provided with sliding grooves for installing the sliding block. A fixing block with a threaded hole is provided at the center of each of the four sides of the upper surface of the fixed base. There are two sliding blocks, which are set in the groove and can slide along the groove; the two sliding blocks are respectively located on both sides of the central groove, and are used to press and protect the long side wall of the blade tenon installed in the central groove; the side wall of the sliding block used to press the blade tenon is provided with a sealing strip that plays a pressing and protective role; the side wall of the sliding block opposite to the blade tenon is provided with a first threaded hole, which is a stepped blind hole; There are two adjustable stops, which are disposed between the two sliding stops and can move between the two sliding stops. The two adjustable stops are located on both sides of the central groove and are used to press and protect the short sidewall of the blade tenon installed in the central groove. The sidewall of the adjustable stop used to press the blade tenon is provided with a sealing strip that plays a pressing and protective role. The sidewall of the adjustable stop away from the blade tenon is provided with a second threaded hole, which is a stepped blind hole. There are two sets of sliding bolts, two in each set; the first set of sliding bolts passes through the two fixed blocks in the width direction of the fixed base and then screws into the first threaded hole on the side wall of the sliding block; the second set of sliding bolts passes through the two fixed blocks in the length direction of the fixed base and then screws into the second threaded hole on the side wall of the adjustable block; by rotating the first set of sliding bolts and the second set of sliding bolts, the sliding block and the adjustable block can be moved respectively, so as to realize the positioning, clamping and protection of the blade tenon side wall.

2. The aeroengine compressor blade nose cold spray protection device of claim 1, wherein: The groove is a T-shaped groove with a T-shaped cross-section, and the length direction of the T-shaped groove is parallel to the width direction of the central groove.

3. The gas turbine engine compressor blade nose cold spray protective device of claim 2, wherein: The sliding block includes a long strip-shaped block body and two sliders disposed at the bottom of the long strip-shaped block body; the long strip-shaped block body has a first rectangular groove and a second rectangular groove arranged vertically on the side wall for pressing the blade tenon, and a sealing strip for pressing and protecting is bonded in the first rectangular groove; the sliders are installed in the T-shaped groove. The adjustable stop includes an adjustable stop body; the adjustable stop body is a parallelepiped structure with parallelograms on both the top and bottom surfaces. In this parallelepiped structure, a sealing strip for pressing and adhering to the short sidewall surface of the blade tenon is attached to one side, and a boss is provided on two opposite sides of the other three sides. The second threaded hole is provided in the middle of the remaining side. The boss is adapted to the second rectangular groove on the sidewall of the sliding stop. The angle between the side where the sealing strip is located and the bottom surface is equal to the angle between the short sidewall of the blade tenon and the horizontal plane. The angle between the side where the sealing strip is located and the side where the boss is located is equal to the angle between two adjacent sides of the bottom surface of the blade tenon. This allows the sidewall of the parallelepiped structure to adapt to the short sidewall surface of the blade tenon to be protected, thereby pressing and adhering to the short sidewall surface of the blade tenon.

4. The turbine blade tip cold spray protection device of claim 3, wherein: Multiple sets of sliding blocks are pre-installed, with two blocks in each set. The length of each set of sliding blocks can cover the length of the long sidewall of the tenon at each level of blade, and the height of each set of sliding blocks matches the height of the long sidewall of the tenon at each level of blade. The appropriate sliding block is selected for use according to the size parameters of the long sidewall of the tenon. Multiple sets of adjustable blocks are pre-installed, with two blocks in each set. The multiple sets of adjustable blocks are used to match the short sidewall of the tenon at different levels of blade. The appropriate adjustable block is selected for use according to the size parameters of the short sidewall of the tenon. The two adjustable blocks belonging to the same set are arranged between the two sliding blocks, and the boss on them is located in the second rectangular groove.

5. The gas turbine engine compressor blade nose cold spray protective device of claim 4, wherein: Rolling bearings are provided on both opposite sidewalls of the slider.

6. The gas turbine engine compressor blade nose cold spray protective device of claim 5, wherein: The sliding bolt has a smooth rod structure after the first n threads; n≥3; the first threaded hole and the second threaded hole are both stepped blind holes, the stepped sidewall is a threaded hole that matches the thread of the sliding bolt, and the rest of the part is unthreaded; when the threaded section of the sliding bolt in front of the smooth rod structure is completely screwed into the threaded hole in the stepped blind hole, the smooth rod structure of the sliding bolt is located in the threaded hole in the stepped blind hole and can slide in it, so that the sliding stop and the sliding bolt, and the adjustable stop and the sliding bolt are rotated and separated.

7. The gas turbine engine compressor blade nose cold spray protective device of claim 6, wherein: The bottom edges of the central groove are chamfered.

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