Shot blasting tool for 3-8-level drum of V2500 aero-engine

Abstract

The utility model discloses a shot blasting tool for a 3-8-level drum of a V2500 aero-engine, which comprises a protective cover which is a cylinder with a closed upper end and is used for covering a 3-5-level area of a part and exposing a 6-8-level area for shot blasting repair; the bracket is used for bearing parts; the positioning block is fixed on the bracket and is used for being inserted into a middle hole channel of the part; and the long screw rod is used for extending from the opening in the top surface of the part and is downwards fixed on the positioning block. According to the utility model, the bracket is used for bearing parts, and the long screw rod is matched with the positioning block, so that the parts are kept in the center in a rotating manner in the repairing process, and the parts are prevented from toppling over due to rotation in the repairing process, therefore, the parts can be fixed in the shot blasting process, and areas which do not need to be repaired are shielded; and shot blasting repair is completed. The device is simple in structure, low in cost, convenient to use and install, easy to position and high in safety coefficient.

Description

Technical Field

[0001] The utility model relates to a shot peening tool, in particular to a shot peening tool for 3rd to 8th grade drums of a V2500 aircraft engine. Background Art

[0002] The 3-8 stage drum is a key rotor life part in the aircraft engine compressor. The rotor blades of the high-pressure compressor from the 3rd stage to the 8th stage are installed on the drum.

[0003] The V2500 aircraft engine is a twin-rotor, axial-flow, high-bypass turbofan engine developed by International Aero Engines. It is mainly installed on passenger aircraft such as A319, A320, and A321. The engine has the advantages of low noise, low emissions, high reliability, and low fuel consumption. During engine operation, the high-pressure compressor drives the high-pressure compressor blades to rotate at a maximum speed of 15,000 revolutions per minute to compress air in preparation for subsequent combustion. The 6-8th stage sealing ring slot of the 3-8th stage drum of the high-pressure compressor needs to be polished and shot peened because the sealing ring will vibrate and cause wear as the drum rotates after installation, so the worn parts need to be repaired.

[0004] During the shot peening process, because the 3-8 level drums need to rotate with the turntable of the shot peening machine, and the manufacturer does not provide an official tooling model in the engine maintenance manual, the shot peening tooling needs to be designed by the maintenance manufacturer. Utility Model Content

[0005] The utility model aims to provide a shot peening tool for the 3-8th stage drum of a V2500 aircraft engine which has a simple structure, low cost and is easy to use, and can fix parts during the shot peening process and provide shielding for areas that do not need to be repaired.

[0006] The purpose of the utility model is achieved through the following technical solution: a shot peening tool for the 3rd to 8th grade drum of a V2500 aircraft engine, characterized in that it includes:

[0007] The protective cover is a cylinder with a closed upper end, which is used to cover the 3-5 level area of ​​the part and expose the 6-8 level area for shot peening repair;

[0008] A bracket, used to carry parts;

[0009] A positioning block is fixed on the bracket and is used to be inserted into the middle hole of the part;

[0010] A long screw rod is used to extend from the opening on the top surface of the part and be fixed downward on the positioning block;

[0011] The bracket includes a support foot, a bottom plate fixed at the lower end of the support foot, and a top plate fixed at the upper end of the support foot. The top surface periphery of the top plate has an annular boss for supporting the periphery of the bottom surface of the part. A groove is provided in the middle of the top surface of the top plate, and a through hole is opened in the groove. The positioning block is composed of a cylindrical body for inserting into the middle channel of the part, a convex part provided on the bottom surface of the body, and an extension part provided on the periphery of the bottom of the body. The extension part is located in the groove, and the convex part passes through the through hole. The positioning block is connected to the top plate through the body and is fixed on the top plate. The lower end of the long screw is inserted into the top of the positioning block. Raising the support foot can ensure that the spray gun can spray the bottom surface of the part during the shot peening process.

[0012] The utility model uses a bracket to carry parts, and adopts a long screw and a positioning block to make the parts rotate and keep them in the center during the repair process, and ensure that the parts will not fall due to rotation during the repair process. Therefore, the utility model can fix the parts during the shot peening process and provide shielding for the area that does not need to be repaired, so as to complete the shot peening repair. The utility model has a simple structure, low cost, easy use, easy installation, easy positioning, and a high safety factor.

[0013] The protective cover of the utility model is made of a steel plate, and a PU layer is covered on the outside of the steel plate. The PU layer can ensure that the protective cover will not be deformed after multiple shot blasting.

[0014] The shot blasting tool of the utility model comprises a positioning pin used for cooperating with a positioning hole of a shot blasting machine, and the positioning pin is fixed at the center of a bottom plate of a bracket to ensure that the tool is located at the center of a turntable after being placed in the shot blasting machine.

[0015] The shot blasting tool of the utility model comprises lifting ears, and the lifting ears are distributed on the periphery of the bottom plate of the bracket. Because the tool has a large deadweight, a crane is used to lift the tool onto the turntable of the shot blasting machine through the lifting ears, so as to facilitate transfer.

[0016] The long screw rod of the utility model is a T-shaped piece, the transverse part of which is used for overlapping on the top surface of the part, and the vertical part extends into the part.

[0017] The utility model provides an elastic ring for clamping parts at the bottom of the side wall in the protective cover. The elastic ring is made of elastic material, so that the protective cover can be firmly installed on the parts.

[0018] Compared with the prior art, the utility model has the following significant effects:

[0019] ⑴ The utility model uses a bracket to carry parts, and adopts a long screw and a positioning block to ensure that the parts rotate and remain in the center during the repair process, and ensure that the parts will not fall over due to rotation during the repair process. Therefore, the parts can be fixed during the shot peening process and the area that does not need to be repaired can be shielded to complete the shot peening repair.

[0020] (2) The utility model has the advantages of simple structure, low cost, easy use, easy installation, easy positioning, high safety factor, and can well solve the risk of tipping during maintenance due to the high center of gravity of the parts and the difficulty of shielding and protecting the complex shape of the upper part of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a cross-sectional view of the utility model (with parts installed).

[0023] In the figure: 1-protection cover, 2-parts, 3-bracket, 4-positioning block, 5-long screw, 6-support foot, 7-bottom plate, 8-top plate, 9-positioning pin, 10-lifting ear, 11-elastic ring, 12-steel plate, 13-PU layer, 14-annular boss, 15-extension part. DETAILED DESCRIPTION

[0024] like Figure 1 As shown, it is a shot peening tool for the 3-8th drum of a V2500 aircraft engine of the utility model, comprising a protective cover 1, a bracket 3, a positioning block 4, a long screw 5, a positioning pin 9 and a lifting lug 10, wherein:

[0025] The protective cover 1 is a cylindrical body with a closed upper end, made of a steel plate 12, and covered with a PU layer 13 on the outside of the steel plate 12. This PU layer can ensure that the cylindrical body will not be deformed after multiple shot peening. When in use, the protective cover 1 covers the upper part of the part 2, that is, it covers the 3-5 level area of ​​the part 2 (the 3-8 level drum of the V2500 aircraft engine), and exposes the 6-8 level area for shot peening repair; an elastic ring 11 for clamping the part 2 is provided at the bottom of the side wall inside the protective cover 1. The elastic ring 11 is made of PU material and is integrally formed with the PU layer 13 covering the outside of the steel plate. The elastic ring 11 is firmly installed on the part 2 through its own extrusion deformation.

[0026] The bracket 3 is used to support the part 2, which includes multiple supporting feet 6, a bottom plate 7 fixed at the lower end of the supporting feet 6 and a top plate 8 fixed at the upper end of the supporting feet 6. Raising the supporting feet can ensure that the spray gun can spray the bottom surface of the part during the shot peening process.

[0027] The positioning block 4 is made of POM material and is used to be inserted into the middle channel of the part 2. The top surface periphery of the top plate 8 has an annular boss 14 for supporting the bottom periphery of the part 2. A groove is provided in the middle of the top surface of the top plate 8, and a through hole is opened in the groove. The positioning block 4 is composed of a cylindrical body for inserting into the middle channel of the part 2, a convex part provided on the bottom surface of the body, and an extension part 15 provided on the bottom periphery of the body. The extension part 15 is located in the groove for supporting the part 2 located at the periphery of its central channel. The convex part passes through the through hole. The positioning block 4 is connected to the top plate 8 through the body and is fixed on the top plate 8. The lower end of the long screw 5 is inserted on the top of the positioning block 4. The positioning block 4 can ensure that the rotation of the part remains in the center during the repair process.

[0028] The long screw 5 is a T-shaped piece made of POM material, the horizontal portion of which is used to overlap the top surface of the part 2, and the vertical portion extends into the part 2, and the lower end of the vertical portion is inserted into the top of the positioning block 4, thereby ensuring that the part 2 will not fall over due to rotation during the repair process.

[0029] The positioning pin 9 is fixed at the center of the bottom plate 7 of the bracket 3 and is used to cooperate with the positioning hole of the shot blasting machine to ensure that the tool is located at the center of the turntable after being placed in the shot blasting machine.

[0030] The lifting lugs 10 are distributed on the periphery of the bottom plate 7 of the bracket 3. Because the tooling has a large deadweight, a crane can be used to lift the tooling into the shot blasting machine through the lifting lugs 10 for easy transfer.

[0031] The installation process of the utility model is as follows:

[0032] First, use a crane to lift the tool into the shot blasting machine through the lifting ear 10 and place it on the turntable. Then, use the positioning pin 9 to position the tool on the turntable and press it with the pressure plate. Then, lift the part 2 and insert the positioning block 4 into the middle channel. The part 2 naturally falls on the bracket 3 to achieve automatic positioning. Then, extend the long screw 5 into the part 2 through the opening on the top surface of the part 2, and then tighten it with the positioning block 4 to fix the part 2 on the tool to prevent it from tipping over. Finally, cover the upper part of the part 2 with the protective cover 1 so that only the part that needs to be repaired is exposed. Then use tape to stick the joint to complete the installation.

[0033] The implementation methods of the utility model are not limited to this. According to the above content of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above basic technical ideas of the utility model, the utility model can also make other various forms of modifications, replacements or changes, all of which fall within the scope of protection of the utility model.

Claims

1. A shot peening tool for the 3rd to 8th stage drum of a V2500 aircraft engine, characterized in that include: The protective cover is a cylinder with a closed upper end, which is used to cover the 3-5 level area of ​​the part and expose the 6-8 level area for shot peening repair; A bracket, used to carry parts; A positioning block is fixed on the bracket and is used to be inserted into the middle hole of the part; A long screw rod is used to extend from the opening on the top surface of the part and be fixed downward on the positioning block; The bracket includes a supporting foot, a bottom plate fixed to the lower end of the supporting foot and a top plate fixed to the upper end of the supporting foot. The top surface periphery of the top plate has an annular boss for supporting the periphery of the bottom surface of the part. A groove is provided in the middle of the top surface of the top plate, and a through hole is opened in the groove. The positioning block consists of a cylindrical body for inserting into the middle channel of the part, a convex portion provided on the bottom surface of the body and an extension portion provided on the bottom periphery of the body. The extension portion is located in the groove, and the convex portion passes through the through hole. The positioning block is fixed to the top plate by connecting the body to the top plate, and the lower end of the long screw is inserted into the top of the positioning block.

2. The shot peening tool for the 3rd to 8th stage drum of the V2500 aircraft engine according to claim 1, characterized in that: The protective cover is made of a steel plate, and a PU layer is covered on the outside of the steel plate.

3. The shot peening tool for the 3rd to 8th stage drum of the V2500 aircraft engine according to claim 2 is characterized in that: The shot peening tool comprises a positioning pin for cooperating with a positioning hole of a shot peening machine, and the positioning pin is fixed at the center of a bottom plate of the bracket.

4. The shot peening tool for the 3rd to 8th stage drum of the V2500 aircraft engine according to claim 3 is characterized in that: The shot peening tool comprises lifting ears, which are distributed on the periphery of the bracket bottom plate.

5. The shot peening tool for the 3rd to 8th stage drum of the V2500 aircraft engine according to claim 4 is characterized in that: The long screw is a T-shaped piece, the transverse portion of which is used to overlap the top surface of the part, and the vertical portion extends into the part.

6. The shot peening tool for the 3rd to 8th stage drum of the V2500 aircraft engine according to claim 5, characterized in that: An elastic ring for clamping parts is arranged at the bottom of the side wall inside the protective cover.

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