Tenon protection device and method for high-pressure compressor rotor blade part anticorrosive coating processing

Abstract

The application discloses a tenon protection device and method for anticorrosion coating processing of a high-pressure compressor rotor blade part, and the protection device comprises a clamping body, rotary locking studs, movable sliding blocks and limiting blocks. Rectangular grooves are formed in the clamping body, and a plurality of movable sliding blocks are placed in the rectangular grooves, and four adjacent movable sliding blocks form a tenon clamping hole. The application clamps and protects and fixes the non-coating part of the blade through the special protection device, and facilitates sand blowing and coating. The application is convenient to use, can quickly clamp the blade, ensures that the tenon is not affected by sand blasting and spraying, saves time and labor, and guarantees the processing quality of the blade coating.

Description

Technical Field

[0001] This invention belongs to the field of surface engineering technology, specifically a protective device and a method for coating anti-corrosion coatings on rotor blades of high-pressure compressors for aero engines. Background Technology

[0002] The high-pressure compressor rotor blades of aero-engines are assembled into the engine compressor components and are hot-end parts of the engine. The blade material has poor corrosion resistance. To meet the "three-proof" requirements of the marine environment and extend the engine's service life, the flow channel surfaces of each stage of the high-pressure compressor rotor blades need to be coated with a water-based anti-corrosion coating using an air spray method. This coating isolates the parts from air, thus preventing rust. To improve coating adhesion and remove dirt and other impurities from the parts' surface that could affect coating quality, the flow channel surface needs to be sandblasted before coating. To ensure assembly clearance, the blade tenon area is an uncoated surface and requires protection (see...). Figure 1 Conventional protective methods are inefficient, affecting product processing cycles and quality. Summary of the Invention

[0003] The present invention aims to provide a tenon protection device and method for processing anti-corrosion coating of high-pressure compressor rotor blade parts, which solves the problem of tenon protection during the coating processing of blade parts. It is simple to operate, easy to clamp, and can effectively protect the tenons of engine blade parts, significantly improving the protection efficiency and protection quality of blade parts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Tenon protection device for processing anti-corrosion coating of high-pressure compressor rotor blade parts, including,

[0006] The clamping body has a rectangular groove on its upper surface, and the rectangular groove extends in a straight line along the length of the clamping body.

[0007] A limiting block is disposed at the first end of the rectangular groove along its length direction;

[0008] Movable sliders, multiple movable sliders are placed in a rectangular groove, and four adjacent movable sliders each provide a surface and surround to form a tenon clamping hole;

[0009] A rotary locking stud is fixed on a clamping body and includes a stud and a handle. The end of the stud is pressed against a movable slider at the second end of the rectangular groove along its length.

[0010] Furthermore, the limiting block is installed in the rectangular groove by bolts.

[0011] Alternatively, the movable slider is a triangular prism, with the first side of each prism in close contact with the sidewall of the rectangular groove, the second side of each prism being used to form a tenon clamping hole, a portion of the third side of each prism in close contact with another movable slider, and the remaining portion of the third side being used to form another tenon clamping hole.

[0012] Alternatively, the movable slider is a quadrangular prism, with the first side of each quadrangular prism in close contact with the sidewall of the rectangular groove, the second side of each quadrangular prism in close contact with another movable slider, the third side of each quadrangular prism entirely used to form a tenon clamping hole, and the fourth side of each quadrangular prism entirely used to form another tenon clamping hole.

[0013] Furthermore, the rotary locking stud is connected to the clamp body via a mounting plate and bolts.

[0014] A method for processing an anti-corrosion coating on a high-pressure compressor rotor blade part using the aforementioned tenon protection device includes the following steps:

[0015] Step 1: Clean and remove oil, removing oil and dirt from the surface of the leaves and letting them air dry;

[0016] Step 2: Loosen the rotary locking stud, causing the stud to move away from the first end of the rectangular groove. At this time, a gap is formed between the adjacent movable sliders. Place the blades into the tenon clamping holes in the same direction.

[0017] Step 3: Tighten the rotary locking stud, moving the stud toward the first end of the rectangular groove along its length until all the tenons of the blades are clamped by the movable slider without any looseness.

[0018] Step 4, sand blowing: Place the clamp and blades into the sand blowing device for sand blowing treatment. During the sand blowing process, adjust the sand blowing angle and slowly move the spray gun to sand blow all flow channel surfaces of all blades.

[0019] Step 5: Apply anti-corrosion coating. Load the prepared anti-corrosion coating into the spray gun and spray it onto the surface of the blade flow channel according to the spraying process requirements until the coating thickness meets the requirements.

[0020] Furthermore, step five includes a curing step and a disassembly step. In the curing step, after the surface of the sprayed blade is dry, it is placed in an oven along with the clamping body, heated to the specified temperature and kept at that temperature for the corresponding time to cure the coating. In the disassembly step, the rotary locking stud is loosened, the movable slider is loosened in sequence, and the blades are removed one by one.

[0021] Compared with existing technologies, this invention uses a specialized protective device to clamp and secure the uncoated parts of the blades, facilitating sandblasting and coating application. This invention is easy to use, allowing for quick blade clamping to ensure the tenons are unaffected by sandblasting and coating, saving both time and labor while ensuring the quality of the blade coating. Specifically, this invention has the following advantages:

[0022] (1) The number of clamps is flexible and adjustable, and the number of movable sliders can be adjusted flexibly according to the needs of the blades; (2) The blade body is straightened by the dovetail movable slider, which is convenient for spraying and can effectively reduce the shading effect between blades.

[0023] (3) Steel parts, the sandblasted surface is not easily damaged, the clamp body and the movable slider are made of high temperature alloy, the coating is processed and then put into the furnace for curing together with the parts to meet the curing conditions of 550℃, and there is no need to repeatedly disassemble and clamp.

[0024] (4) Using studs to apply fixing force and fix the tenon position, the clamping is firm and the parts will not loosen or fall off during sandblasting and spraying. The protective effect is better than using tape protection, and there is no risk of residual glue on the tenon or damage to the parts by the tape. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the blade structure involved in this invention;

[0026] Figure 2 A schematic diagram showing the assembly of the blades and protective devices.

[0027] In the diagram: 1. Rotary locking stud; 2. Clamp body; 3. Movable slider; 4. Blade; 5. Tenon clamping hole. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0029] To address the protection issue of tenons during blade sandblasting and coating processes, this invention designs a protective device from the following aspects:

[0030] ① Use clamp 2 to clamp a certain number of blades 4 as needed, tighten the rotary locking stud 1 to lock and fix the tenon of the blades 4, so that the blades 4 are locked without loosening (e.g. Figure 2The movable slider 3 is a triangular prism or a quadrangular prism (selected according to the placement angle of the blade 4, thereby changing the position of the blade 4 relative to the sandblasting or spraying surface, i.e., the rotation of the blade 4 in its own Z-axis direction), forming a dovetail tenon clamping hole 5, such as... Figure 2 Multiple movable sliders 3 are placed in the rectangular groove of the clamping body 2. Four adjacent movable sliders 3 form a tenon clamping hole 5. To ensure that the movable sliders 3 can be pressed tightly, the movable sliders 3 that contact the limiting block and the rotary locking stud 1 need to be cut so that the contact surface between the movable sliders 3 and the limiting block and the rotary locking stud 1 is as large as possible. Figure 2 In the bottom sub-figure, the movable slider 3, which contacts the limiting block and the rotary locking stud 1, has been partially cut, so that the limiting block, the rotary locking stud 1, and the movable slider 3 all have large surface (planar) contact. The limiting block is fixed to the left side of the rectangular groove in the clamping body 2 by bolts, and the rotary locking stud 1 is fixed to the right side of the clamping body 2 by a mounting plate. Rotating the handle in the rotary locking stud 1 drives the stud to move relative to the movable slider 3.

[0031] ② To enhance coating adhesion and clean the flow channel surface, the flow channel surface of blade 4 is sandblasted, and the surface of blade 4 and protective device is cleaned after sandblasting.

[0032] ③ Apply the corresponding anti-corrosion coating to the flow channel surface of the blade 4 after sandblasting. There is no need to disassemble the clamp body 2 and the movable slider 3. It can be heated and cured together with the blade.

[0033] The following are protective devices using the present invention. Figure 1 The specific steps for applying an anti-corrosion coating to the blades are as follows:

[0034] (1) Inspection:

[0035] Blade 4 should be free from defects such as mechanical damage, rust, and dirt.

[0036] (2) Cleaning and degreasing:

[0037] Clean blade 4 with clean acetone, alcohol, or water-based cleaner. Blade 4 should be air-dried or blow-dried after cleaning.

[0038] (3) Clamping:

[0039] Loosen the rotary locking stud 1 to ensure that the movable slider 3 can move. Then, in the same direction, clamp the blades into the holes 5 one by one. After clamping, tighten the rotary locking stud 1 to ensure that all clamped blades 4 are secure. Clean gloves must be worn during the operation.

[0040] (4) Sand blowing:

[0041] According to the sandblasting process requirements, the blade 4 is sandblasted according to the required sandblasting particle size, air pressure, sandblasting distance and sandblasting angle. By adjusting the sandblasting angle and slowly moving the spray gun, all flow channel surfaces of the blade 4 are sandblasted. It is not allowed to fix one place for sandblasting.

[0042] (5) Cleaning:

[0043] After sandblasting, clean compressed air is used to remove sand and dust from the surfaces of blade 4, clamp body 2, and movable slider 3.

[0044] (6) Applying anti-corrosion coating:

[0045] Load the prepared anti-corrosion coating into the spray gun and spray it onto the flow channel surface of blade 4 according to the spraying process requirements to ensure the coating thickness and avoid defects such as coating dripping and dry spraying.

[0046] (7) Curing:

[0047] After the surface of the sprayed blade 4 is dry, place the blade 4 and the clamp body 2 together in an oven, heat it to the specified temperature and keep it at that temperature for the corresponding time to cure the coating.

[0048] (6) Disassembly:

[0049] Loosen the rotary locking stud 1, then loosen the movable slider 3 in sequence. Remove the blade 4 and clean the protective device for future use. Wear clean gloves during operation; do not touch the coated surface of the blade 4 with bare hands to prevent contamination.

[0050] Based on the shape and technical processing characteristics of blade 4, this invention designs and manufactures a special protective device for blades, which effectively protects the tenon part of blade 4, while greatly improving the processing efficiency of blade anti-corrosion coating, avoiding the problem of sandblasting surface contamination of blade 4, and improving the quality of blade anti-corrosion coating.

[0051] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A tenon protection device for processing anti-corrosion coating on high-pressure compressor rotor blade parts, characterized in that: include, The clamp body (2) has a rectangular groove on its upper end face, and the rectangular groove extends in a straight line along the length direction of the clamp body (2). A limiting block is disposed at the first end of the rectangular groove along its length direction; Movable slider (3), multiple movable sliders (3) are placed in a rectangular groove, and four adjacent movable sliders (3) each provide a surface and enclose a tenon clamping hole (5). A rotary locking stud (1) is fixed on a clamping body (2), and the rotary locking stud (1) includes a stud and a handle. The end of the stud is pressed against the movable slider (3) at the second end of the rectangular groove in the length direction. The movable slider (3) is a triangular prism. The first side of each triangular prism is in close contact with the side wall of the rectangular groove. The second side of each triangular prism is used to form a tenon clamping hole (5). A portion of the third side of each triangular prism is in close contact with another movable slider (3), and the remaining portion of the third side is used to form another tenon clamping hole (5). Alternatively, the movable slider (3) is a quadrangular prism, with the first side of each quadrangular prism in close contact with the side wall of the rectangular groove, the second side of each quadrangular prism in close contact with another movable slider (3), the third side of each quadrangular prism being used to form a tenon clamping hole (5), and the fourth side of each quadrangular prism being used to form another tenon clamping hole (5). Choose either a triangular prism or a quadrangular prism as the movable slider (3) based on the placement angle of the blade (4), thereby changing the position of the blade (4) relative to the sandblasted or sprayed surface.

2. The tenon protection device for processing anti-corrosion coating of high-pressure compressor rotor blade parts according to claim 1, characterized in that: The limiting block is installed in the rectangular groove by bolts.

3. The tenon protection device for processing anti-corrosion coating of high-pressure compressor rotor blade parts according to claim 1, characterized in that: The rotary locking stud (1) is connected to the clamp body (2) by a mounting plate and bolts.

4. A method for processing an anti-corrosion coating on a high-pressure compressor rotor blade part using the tenon protection device described in claim 1, characterized in that: Includes the following steps: Step 1: Clean and remove oil, removing oil and dirt from the surface of the leaves and letting them air dry; Step 2: Loosen the rotary locking stud (1) so that the stud moves away from the first end of the rectangular groove. At this time, a gap is formed between the adjacent movable sliders (3). Place the blades into the tenon clamping holes (5) in the same direction. Step 3, tighten the rotary locking stud (1) so that the stud moves toward the first end of the rectangular groove length direction until all the tenons of the blades are clamped by the movable slider (3) without loosening; Step 4, sand blowing: Place the clamp (2) and the blade as a whole into the sand blowing device for sand blowing treatment. During the sand blowing process, adjust the sand blowing angle and slowly move the spray gun to blow sand onto the surface of all flow channels of all blades. Step 5: Apply anti-corrosion coating. Load the prepared anti-corrosion coating into the spray gun and spray it onto the surface of the blade flow channel according to the spraying process requirements until the coating thickness meets the requirements.

5. The method for processing anti-corrosion coating on high-pressure compressor rotor blade parts according to claim 4, characterized in that: Step 5 is followed by a curing step and a disassembly step. In the curing step, after the surface of the sprayed blade is dry, it is placed in an oven along with the clamp (2) and heated to the specified temperature and kept warm for the corresponding time to cure the coating. In the disassembly step, the rotary locking stud (1) is loosened, the movable slider (3) is loosened in sequence, and the blades are removed one by one.

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