Clamping structure and blade repairing device

Abstract

The utility model discloses a clamping structure and a blade repairing device, which comprises two oppositely arranged clamping pieces, a blade base arranged between the two clamping pieces, a driving assembly, a penetrating rod and two abutting pieces movably sleeved outside the penetrating rod, the clamping pieces are provided with movement holes for the penetrating rod to penetrate through and slide, and the blade base is arranged on the blade base. The two abutting pieces are arranged on the sides, away from each other, of the two clamping pieces correspondingly. The blade base repairing device has the advantages that in the repairing process, a blade base can be firstly placed in the center of the workbench, then the abutting pieces on the penetrating rods are sequentially rotated, the two oppositely-arranged clamping pieces move oppositely, then the blade base is completely clamped, and fixing of a blade is achieved; the diameter of the moving hole is set to be larger than that of the penetrating rod, so that when the abutting piece extrudes the clamping piece to move, the clamping piece deviates to a certain degree according to the shape of the blade base and is better attached to the blade base, and therefore the clamping force of the clamping piece on the blade base is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine blade repair, and in particular to a clamping structure and blade repair device. Background Technology

[0002] Gas turbine blades, subjected to prolonged high temperatures and pressures, are highly susceptible to erosion, wear, oxidation, and corrosion, which negatively impacts the reliability of the gas turbine. A gas turbine contains a large number of blades, but they are extremely expensive. After a certain period of operation, varying degrees of wear, foreign object damage, and material loss are observed at the blade tips. Given the high cost of gas turbine blades, blade repair is more cost-effective than component replacement when considering both maintenance and replacement costs. Therefore, when gas turbine blades malfunction, they are typically repaired. To prevent blade movement during repair and ensure proper functioning, blades are usually secured. However, different blade models have varying sizes. To accommodate different blade models, we propose a clamping structure and blade repair device. Summary of the Invention

[0003] Therefore, the technical problem to be solved by this utility model is that gas turbine blades of different models are not easy to install and fix during repair.

[0004] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a clamping structure and blade repair device, which includes two clamping members arranged opposite to each other, a blade base placed between the two clamping members, a driving component including a through rod, and two abutting members movably sleeved on the outside of the through rod. The clamping members are provided with motion holes for the through rod to slide through, and the two abutting members are respectively arranged on the opposite side of the two clamping members and abut against the adjacent clamping members.

[0005] In a preferred embodiment of the clamping structure and blade repair device of this utility model: the through rod is a threaded rod, and the abutting member is a nut adapted to the through rod.

[0006] In a preferred embodiment of the clamping structure and blade repair device of this utility model: the diameter of the moving hole is larger than the diameter of the through rod.

[0007] In a preferred embodiment of the clamping structure and blade repair device of this utility model: a workbench for fixing the rod is provided below the clamping member, guide blocks are provided at both ends of the clamping member, and a guide groove for sliding the guide block is provided in the middle of the workbench along the axial direction of the moving hole.

[0008] In a preferred embodiment of the clamping structure and blade repair device of this utility model: the repair component includes a welding torch and a resistance heating element, a sealing box, and a sealing cavity inside the sealing box, wherein the clamping structure and the repair component are arranged in the sealing cavity.

[0009] In a preferred embodiment of the clamping structure and blade repair device of this utility model: the repair component further includes two sets of cross slides, which can respectively control the relative positions of the welding torch and the resistance heating element in the sealed cavity.

[0010] In a preferred embodiment of the clamping structure and blade repair device of this utility model: a linear drive mechanism is provided on the side of the cross slide facing the blade, and the output end of the linear drive mechanism is detachably connected to the welding torch and the resistance heating element.

[0011] In a preferred embodiment of the clamping structure and blade repair device of this utility model: a temperature probe for real-time monitoring of the temperature around the blade is also provided in the sealed cavity.

[0012] In a preferred embodiment of the clamping structure and blade repair device of this utility model: an oxygen analyzer is provided in the sealed cavity.

[0013] In a preferred embodiment of the clamping structure and blade repair device of this utility model: the sealing box includes a sealing door disposed on its outer side and an observation window installed on the sealing door.

[0014] The beneficial effects of this utility model are as follows: During the repair process, the blade base can be placed in the center of the workbench first, and then the abutment on the through rod can be rotated in sequence to make the two opposing clamping members move towards each other, thereby completely clamping the blade base and fixing the blade. At the same time, since the through rod and the abutment are preferably screws and matching nuts in this embodiment, they have self-locking properties during movement, which further increases the stability of the clamping members in fixing the blade. In addition, by setting the diameter of the moving hole to be larger than the diameter of the through rod, when the abutment squeezes the clamping members, the clamping members will shift to a certain extent according to the shape of the blade base, making them fit the blade base better, thereby increasing the contact area between the clamping members and the blade base and improving its clamping force on the blade base. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0016] Figure 1 A schematic diagram of the clamping structure in the utility model is shown;

[0017] Figure 2 It shows Figure 1 Enlarged structural diagram of region A in the middle;

[0018] Figure 3 A top view of the workbench structure in the utility model is shown;

[0019] Figure 4 It shows Figure 3 Enlarged structural diagram of region B in the middle;

[0020] Figure 5 A cross-sectional view of the sealing box in the utility model is shown.

[0021] Figure 6 A front view of the sealed box in the utility model is shown. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0024] This embodiment provides a clamping structure, such as Figure 1 As shown, two clamping members 1 are arranged opposite each other on the workbench 3. The motion hole 13 on the clamping members 13 allows the through rod 21 arranged on the workbench 3 to slide. The through rod 21 is provided with an abutment member 22, which abuts against the clamping members 1. In this embodiment, the through rod 21 and the abutment member 22 are preferably screws and nuts that are adapted to them. When they move on the through rod 21, they can push the clamping members 1 to slide synchronously, thereby realizing the function of clamping the blade base and fixing the blade, preventing it from shaking during the repair process and affecting the repair work.

[0025] When it is necessary to fix the blade, the blade base can be placed in the center of the workbench 3 first, and then the abutment 22 on the through rod 21 can be rotated in sequence to make the two oppositely arranged clamping members 1 move towards each other, thereby completely clamping the blade base and fixing the blade. At the same time, since the through rod 21 and the abutment 22 are preferably screws and matching nuts in this embodiment, they have self-locking performance when moving, which further increases the stability of the clamping members 1 in fixing the blade.

[0026] like Figure 2 As shown, guide grooves 12 are provided on both sides of the workbench 3. Guide blocks 11 are provided in the guide grooves 12 and slide with them. One side of the guide block 11 is fixedly connected to the clamping member 1. This setting provides guidance for the movement of the clamping member 1, avoids the clamping member 1 from shifting during the movement, and ensures the normal operation of the blade fixing work.

[0027] The blade base may have an irregular shape depending on the application requirements. This reduces the contact area between the clamping member 1 and the blade base during clamping, affecting the clamping member 1's fixation of the blade base. As a further improvement, in this embodiment, the diameter of the moving hole 13 is set to be larger than the diameter of the through rod 21, preventing a threaded connection between the two. Figure 3 and Figure 4 As shown, when the contacting member 22 presses against the clamping member 1, the clamping member 1 will shift to a certain extent according to the shape of the blade base, such as... Figure 3 As shown, it fits the blade base more closely, thereby increasing the contact area between the clamping member 1 and the blade base and improving its clamping force on the blade base.

[0028] like Figure 5 As shown, the repair component 4 is located inside the sealed box 7 and includes a welding torch 41 disposed in the sealed cavity. The welding torch 41 can be a laser welding machine or an electron beam welding machine, mainly used for high-precision welding of blades. Since it and the resistance heating element are both existing technologies, they will not be described in detail in this patent.

[0029] like Figure 5 As shown, the sealed cavity is equipped with a temperature probe 5 for real-time monitoring of the temperature around the blade and a resistance heating element 42 wrapped around the blade. The number of temperature probes is not unique, and they are arranged around the blade to comprehensively monitor the temperature around the blade. During the repair process, due to rapid thermal cycling and high cooling rate, the liquid film between dendrites may not be able to replenish in time, resulting in cracks in the blade. Therefore, in this embodiment, the temperature around the blade is detected by the temperature probe 5 so that the temperature around the blade can be adjusted in time by the resistance heating element 42, thereby reducing the temperature gradient during the solidification process of the liquid film and improving this defect. The resistance heating element 42 is generally a heating resistance wire, which, along with the temperature probe 5, is existing technology and will not be described in detail in this solution.

[0030] like Figure 5 As shown, the sealed cavity is equipped with two sets of cross slides 43, which can respectively control the relative positions of the welding torch 41 and the resistance heating element 42 in the sealed cavity, ensuring the normal progress of the blade repair work. Meanwhile, as... Figure 5As shown, the inner wall of the sealed cavity is provided with a groove that cooperates with the cross slide 43, which can ensure that the cross slide 43 will not shift during use. In addition, the cross slide 43 is existing technology, which is generally a combination slide composed of two sets of linear slides in the X-axis direction and the Y-axis direction. It will not be described in detail in this patent.

[0031] like Figure 5 and Figure 6 As shown, the sealed chamber 7 has a sealed door 71 at its opening, with an observation window on the sealed door 71. An oxygen analyzer 6 is installed inside the sealed chamber. During the repair process, argon or other inert gases are injected into the sealed chamber to replace the gas, keeping the oxygen concentration at a low level. This provides an inert environment for the blade repair process, ensuring that the gas value remains below a specified value, thus reducing material oxidation, preserving the performance of the repair material, and improving repair quality. Therefore, the sealed door 71 ensures the airtightness of the sealed chamber, preventing airflow between the inside and outside of the sealed chamber 7. The oxygen analyzer 6 monitors the oxygen volume fraction inside the sealed chamber in real time, allowing for timely replenishment of inert gas. The observation window on the sealed door 71 facilitates real-time monitoring of the blade repair process, ensuring the smooth progress of the repair work.

[0032] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A clamping structure, characterized in that: include Two opposing clamping members (1) are provided, and a blade base is placed between the two clamping members (1); The drive assembly (2) includes a through rod (21) and two abutting members (22) movably sleeved on the outside of the through rod (21). The clamping member (1) is provided with a motion hole (13) through which the through rod (21) slides. The two abutting members (22) are respectively disposed on opposite sides of the two clamping members (1) and abut against the adjacent clamping member (1).

2. The clamping structure according to claim 1, characterized in that: The through rod (21) is a threaded rod, and the abutting part (22) is a nut that is adapted to the through rod (21).

3. The clamping structure according to claim 2, characterized in that: The diameter of the moving hole (13) is larger than the diameter of the through rod (21).

4. The clamping structure according to claim 3, characterized in that: The clamping member (1) is provided with a workbench (3) for fixing the through rod (21) below it. The clamping member (1) is provided with guide blocks (11) at both ends. The workbench (3) is provided with a guide groove (12) in the middle position along the axial direction of the motion hole (13) for the guide block (11) to slide.

5. A blade repair device, characterized in that: Includes the clamping structure described in any one of claims 1 to 4; and, Repair component (4), including welding torch (41) and resistance heating element (42); A sealing box (7) is provided inside the sealing box (7), and the clamping structure and repair component (4) are arranged in the sealing cavity.

6. The blade repair device according to claim 5, characterized in that: The repair component (4) also includes two sets of cross slides (43), which can control the relative positions of the welding torch (41) and the resistance heating element (42) in the sealed cavity.

7. The blade repair device according to claim 6, characterized in that: The cross slide (43) is provided with a linear drive mechanism on the side facing the blade, and the output end of the linear drive mechanism is detachably connected to the welding torch (41) and the resistance heating element (42).

8. The blade repair device according to claim 7, characterized in that: The sealed cavity is also equipped with a temperature probe (5) for real-time monitoring of the temperature around the blades.

9. The blade repair device according to claim 8, characterized in that: An oxygen analyzer (6) is installed in the sealed cavity.

10. The blade repair device according to claim 5, characterized in that: The sealed box (7) includes a sealed door (71) located on its outside and an observation window (72) installed on the sealed door (71).

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