A spacer ring locking tool

Abstract

A spacer ring locking tool includes a disc support plate, a support plate, and a punch. The support plate is fixedly mounted on the disc support plate. The support plate has an oblique hole with the same inclination angle as the mounting hole on a high-pressure turbine rotor. The punch is movably inserted into the oblique hole and can slide along the axis of the oblique hole. When the disc support plate is supported on the spacer ring, the punch head of the punch faces the opening of the mounting hole on the high-pressure turbine rotor. By supporting the disc support plate on the spacer ring, a fulcrum is formed, ensuring that the locking tool cannot slide under impact. Simultaneously, the oblique hole on the support plate, within which the punch can slide, with the inclination angle matching that of the mounting hole on the high-pressure turbine rotor, allows the punch to move along the axis of the oblique hole when locking the spacer ring. The protrusion formed by the punch impacting the spacer ring is aligned with the inclination of the mounting hole, effectively engaging it.

Description

Technical Field

[0001] This invention relates to the field of assembly tools for aero-engine components, and in particular to a spacer locking tool. Background Technology

[0002] Aero engines are hailed as the crown jewel of industry, representing the pinnacle of industrial manufacturing. Their manufacturing process involves various mechanical connection methods, such as riveting, welding, and bolting.

[0003] The component connection method required by this invention is a structure for fixing spacer components in a manner similar to riveting. See [link / reference]. Figure 1 As shown, this structure requires the spacer ring 4 to be installed on the high-pressure turbine rotor 5. The high-pressure turbine rotor 5 has an inclined mounting hole 501 with an angle β between the mounting hole 501 and the horizontal direction. During installation, a punch is used to punch the spacer ring 4 along the inclined direction of the mounting hole 501, so that the spacer ring 4 forms a protrusion and is inserted into the mounting hole 501 to form a locking groove.

[0004] This structure is located at the center of a core component of an aero-engine, where it operates at very high speeds. The space occupied by this structure is limited, and the locking standards are stringent. It requires punching at an angle, but the punch and other tools are prone to slipping under the impact force. Furthermore, the direction of the protrusion formed by the spacer ring 4 is inconsistent with the inclination of the mounting hole 501. Additionally, the slipping punch can scratch parts, leading to other quality issues, and the locking effect is poor, making it easy for the locking point to detach. Summary of the Invention

[0005] The main objective of this invention is to propose a spacer locking tool to solve the problems of poor locking quality and high difficulty in locking spacer parts, thereby improving production efficiency and product quality.

[0006] To achieve the above objectives, the present invention proposes a spacer ring locking tool, comprising a disc support plate, a support plate, and a punch; the support plate is fixedly mounted on the disc support plate; an oblique hole is provided on the support plate, the inclination angle of which is the same as the inclination angle of the mounting hole on the high-pressure turbine rotor; the punch is movably inserted into the oblique hole, and the punch can slide along the axis of the oblique hole; when the disc support plate is supported on the spacer ring, the punch head of the punch faces the opening of the mounting hole on the high-pressure turbine rotor.

[0007] Preferably, the end of the punch near the punch head is configured with a "Z"-shaped bend. By setting the bend shape, interference between the punch and the high-pressure turbine rotor can be avoided when the mounting hole position on the high-pressure turbine rotor is at a constant height.

[0008] Preferably, the end face of the punch is set as an arc-shaped surface, and the roughness of the arc-shaped surface is not greater than Ra0.8. By setting it as an arc-shaped surface, the protrusion formed by the punch impacting the spacer ring is arc-shaped, reducing stress concentration.

[0009] Preferably, the edges formed between the upper and lower surfaces of the punch and the arc-shaped surface are rounded, and the roughness of the upper and lower surfaces of the punch is no greater than Ra1.6.

[0010] Preferably, a chamfered surface is provided behind the upper surface of the punch, the angle between the chamfered surface and the axial direction of the punch rod is ≤30 degrees, and a chamfered notch is provided below the punch. The chamfered surface and the chamfered notch prevent interference between the punch rod and the spacer ring or the high-pressure turbine rotor.

[0011] Preferably, the oblique hole is a square oblique hole, and the punch rod is a square rod body, with the square rod body slidingly engaging with the square oblique hole; open slots are provided at the four corners of the oblique hole. This structure of square oblique hole and square rod body effectively prevents the punch rod from rotating around itself during impact, ensuring the punch's angle remains constant during operation. The open slots prevent interference between the oblique hole and the edges of the punch rod.

[0012] Preferably, the lower end face of the support plate is provided with two threaded holes for screw connection with the disc support plate, and two pin blind holes are provided; the disc support plate is provided with pin through holes and screw through holes; the pin blind holes and pin through holes are matched, and the tolerance grade is H7; the inner roughness of the pin blind holes and pin through holes is not greater than Ra1.6.

[0013] Preferably, multiple light-reducing holes are provided on the disc support plate.

[0014] Preferably, the lower surface of the disc support plate is provided as a support surface for supporting the spacer ring, and a downwardly protruding positioning frustum is provided, which is used to be inserted into the inner hole of the spacer ring.

[0015] Preferably, the roughness of both the supporting surface and the outer cylindrical surface of the positioning frustum is no greater than Ra0.8, and a chamfer is provided at the bottom edge of the positioning frustum; the diameter accuracy grade of the outer cylindrical surface of the positioning frustum is g7; and the perpendicularity of the positioning frustum relative to the supporting surface is no greater than φ0.03mm.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0017] (1) The spacer locking tool provided by the present invention forms a fulcrum by supporting the disc plate on the spacer, ensuring that the locking tool cannot slide under impact force. At the same time, the support plate is provided with an oblique hole, and the punch can slide in the oblique hole. The inclination angle of the oblique hole is the same as the inclination angle of the mounting hole on the high-pressure turbine rotor. When the punch is struck to lock the spacer, it can move along the axis of the oblique hole, that is, along the axis of the mounting hole. The direction of the protrusion formed by the punch impacting the spacer is consistent with the inclination of the mounting hole, and the protrusion is well locked into the mounting hole. At the same time, the disc plate and the support plate provide support and guidance for the punch, preventing the punch from swinging up and down during the striking process and ensuring the consistency of the inclination angle of the protrusion formed by the locking.

[0018] (2) In this invention, the disc support plate and the support plate form a support and guide for the punch rod, which can effectively prevent the punch from slipping during the striking process and avoid scratching the parts.

[0019] (3) By using the present invention, the pass rate of the spacer lock can be improved, the consistency of the lock can be improved, and thus the pass rate of the assembly of the high pressure turbine rotor and the spacer can be improved, thereby increasing economic benefits. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the spacer lock tool provided by the present invention in operation;

[0022] Figure 2 This is a schematic diagram of the structure of the spacer lock tool provided by the present invention;

[0023] Figure 3 This is a front view of the disc tray in this invention;

[0024] Figure 4 This is a top view of the disc tray in this invention;

[0025] Figure 5 This is a schematic diagram of the support plate in this invention;

[0026] Figure 6 This is a schematic diagram of the punch rod in this invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Disc support plate; 101. Pin through hole; 102. Screw through hole; 103. Lightening hole; 104. Positioning frustum; 105. Support surface; 106. Chamfer; 2. Support plate; 201. Inclined hole; 202. Opening slot; 203. Threaded hole; 204. Pin blind hole; 3. Punch rod; 301. Punch head; 302. Opening bevel; 303. Opening notch; 4. Spacer ring; 5. High-pressure turbine rotor; 501. Mounting hole. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Combination Figure 1 As shown, the structure to be processed by the present invention is to install the spacer ring 4 on the high-pressure turbine rotor 5. The high-pressure turbine rotor 5 has an inclined mounting hole 501. The angle between the mounting hole 501 and the horizontal direction is β. During installation, a punch is used to punch the spacer ring 4 along the inclined direction of the mounting hole 501, so that the spacer ring 4 forms a protrusion and is inserted into the mounting hole 501 to form a locking groove.

[0031] Combination Figures 1 to 6 As shown, a spacer ring locking tool includes a disc support plate 1, a support plate 2, and a punch 3. The support plate 2 is fixedly mounted on the disc support plate 1. An oblique hole 201 is provided on the support plate 2, and the inclination angle of the oblique hole 201 is the same as the inclination angle of the mounting hole 501 on the high-pressure turbine rotor 5, both with an inclination angle of β. The punch 3 is movably inserted into the oblique hole 201, and the punch 3 can slide along the axis of the oblique hole 201. When the disc support plate 1 is supported on the spacer ring 4, the punch 301 of the punch 3 faces the opening of the mounting hole 501 on the high-pressure turbine rotor 5.

[0032] By supporting the disc plate 1 on the spacer ring 4 to form a fulcrum, the locking tool cannot slide under impact. Simultaneously, the support plate 2 has an oblique hole 201 within which the punch 3 slides. The inclination angle of the oblique hole 201 is the same as the inclination angle of the mounting hole 501 on the high-pressure turbine rotor 5. When striking the punch 3 to lock the spacer ring 4, the punch 3 moves along the axis of the oblique hole 201, i.e., along the axis of the mounting hole 501. The direction of the protrusion formed by the punch 301 impacting the spacer ring 4 is consistent with the inclination of the mounting hole 501, and the protrusion is well engaged in the mounting hole 501. At the same time, the disc plate 1 and support plate 2 provide support and guidance for the punch 3, preventing it from swinging up and down during impact and ensuring the consistency of the inclination angle of the protrusion formed during locking.

[0033] In this embodiment, the end of the punch 3 near the punch head 301 is configured with a "Z" shaped bend. By setting the bend shape, interference between the punch 3 and the high-pressure turbine rotor 5 can be avoided when the mounting hole 501 on the high-pressure turbine rotor 5 is at a constant height.

[0034] Combination Figure 6 As shown, the end face of the punch 301 is set as an arc-shaped surface with a radius of R, and the roughness of this arc-shaped surface is no greater than Ra0.8. By setting it as an arc-shaped surface, the protrusion formed by the punch impacting the spacer ring is arc-shaped, reducing stress concentration. The edges formed between the upper and lower surfaces of the punch 301 and the arc-shaped surface are rounded, and the roughness of both the upper and lower surfaces of the punch 301 is no greater than Ra1.6, further reducing stress concentration.

[0035] Furthermore, a sloping surface 302 is provided behind the upper surface of the punch 301, and the angle between the sloping surface 302 and the axial direction of the punch rod 3 is ≤30 degrees. A notch 303 is provided below the punch 301. The sloping surface 302 and the notch 303 are provided to prevent interference between the punch rod 3 and the spacer ring 4 and the high-pressure turbine rotor 5.

[0036] In this embodiment, the oblique hole 201 is a square oblique hole, and the punch 3 is a square rod body, with the square rod body slidingly engaging with the square oblique hole; open slots 202 are provided at the four corners of the oblique hole 201. This structure of square oblique hole and square rod body effectively prevents the punch 3 from rotating around itself during impact, ensuring the angle of the punch 301 during operation. The open slots 202 prevent interference between the oblique hole 201 and the edges of the punch 3.

[0037] In this embodiment, two threaded holes 203 are provided on the lower end face of the support plate 2 for screw connection with the disc support plate 1, and two blind pin holes 204 are provided; the disc support plate 1 is provided with a through pin hole 101 and a screw through hole 102; the blind pin hole 204 and the through pin hole 101 are matched, with a tolerance grade of H7; the inner surface roughness of the blind pin hole 204 and the through pin hole 101 is not greater than Ra1.6. The support plate 2 is fixedly installed on the disc support plate 1 by means of screw connection and pin positioning, which is simple to install and convenient to position.

[0038] In this embodiment, a plurality of weight-reducing holes 103 are provided on the disc tray 1 to reduce the weight of the disc tray 1 and facilitate worker operation.

[0039] In this embodiment, the lower surface of the disc tray 1 is provided as a support surface 105 for supporting the spacer ring 4, and a downwardly protruding positioning frustum 104 is provided, which is inserted into the inner hole of the spacer ring 4. By providing the positioning frustum 104, when using the spacer ring locking tool, it is only necessary to insert the positioning frustum 104 into the inner hole of the spacer ring 4, so that the support surface 105 abuts against the spacer ring 4. The positioning of the disc tray 1 can be completed by using the support surface 105 and the outer peripheral surface of the positioning frustum 104. The positioning structure is simple and the operation is convenient.

[0040] Furthermore, the roughness of both the supporting surface 105 and the outer cylindrical surface of the positioning frustum 104 is no greater than Ra0.8. A chamfer 106 with an angle of 30° is provided at the bottom edge of the positioning frustum 104. The chamfer 106 serves as a guide, facilitating the insertion of the positioning frustum 104 into the inner hole of the spacer ring 4. The diameter accuracy grade of the outer cylindrical surface of the positioning frustum 104 is g7. The perpendicularity of the positioning frustum 104 relative to the supporting surface 105 is no greater than φ0.03mm. Through the above-mentioned roughness settings, accuracy grade, and perpendicularity requirements, the accuracy of positioning is ensured.

[0041] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A spacer lock tool, characterized in that, The device includes a disc support plate (1), a support plate (2), and a punch (3); the support plate (2) is fixedly mounted on the disc support plate (1); an inclined hole (201) is provided on the support plate (2), the inclination angle of which is the same as the inclination angle of the mounting hole (501) on the high-pressure turbine rotor (5); the punch (3) is movably inserted into the inclined hole (201), and the punch (3) can slide along the axis of the inclined hole (201); when the disc support plate (1) is supported on the spacer ring (4), the punch (301) of the punch (3) faces the opening of the mounting hole (501) on the high-pressure turbine rotor (5); The end of the punch (3) near the punch (301) is configured with a "Z" shaped bend; An open cut slope (302) is provided behind the upper surface of the punch (301), the angle between the open cut slope (302) and the axial direction of the punch rod (3) is ≤30 degrees, and an open cut notch (303) is provided below the punch (301). The oblique hole (201) is a square oblique hole, and the punch (3) is a square rod body. The square rod body slides in conjunction with the square oblique hole; the four corners of the oblique hole (201) are provided with open slots (202). The lower surface of the disc support plate (1) is set as a support surface (105) for supporting the spacer ring (4), and a downward protruding positioning frustum (104) is provided, which is used to be inserted into the inner hole of the spacer ring (4).

2. The spacer lock tool as described in claim 1, characterized in that, The end face of the punch (301) is set as an arc surface, and the roughness of the arc surface is not greater than Ra0.

8.

3. The spacer locking tool as described in claim 2, characterized in that, The edges formed between the upper and lower surfaces of the punch (301) and the arc surface are rounded, and the roughness of the upper and lower surfaces of the punch (301) is no greater than Ra1.

6.

4. A spacer locking tool as described in claim 1, characterized in that, Two threaded holes (203) are provided on the lower end face of the support plate (2) for screw connection with the disc support plate (1), and two pin blind holes (204) are provided; a pin through hole (101) and a screw through hole (102) are provided on the disc support plate (1); the pin blind hole (204) and the pin through hole (101) are matched, and the tolerance grade is H7; the inner roughness of the pin blind hole (204) and the pin through hole (101) is not greater than Ra1.

6.

5. A spacer lock tool as described in claim 1, characterized in that, Multiple light-reducing holes (103) are provided on the disc tray (1).

6. A spacer lock tool as described in claim 1, characterized in that, The roughness of both the support surface (105) and the outer cylindrical surface of the positioning frustum (104) is no greater than Ra0.8, and a chamfer (106) is provided at the bottom edge of the positioning frustum (104); the diameter accuracy grade of the outer cylindrical surface of the positioning frustum (104) is g7; the perpendicularity of the positioning frustum (104) relative to the support surface (105) is no greater than 0.03mm.

Images