A mechanism for floating clamping of gas turbine blade profiles

Abstract

The application provides a mechanism for floating clamping of a turbine blade profile, which can be used for clamping of a turbine blade profile, is convenient to use, and can guarantee good clamping rigidity by floating clamping. The mechanism comprises a blade basin side clamping block, a blade back side clamping block, a pressing base one for fixing the blade basin side clamping block, a pressing base two for fixing the blade back side clamping block, a clamping part on the upper part of the blade basin side clamping block and the blade back side clamping block for clamping the turbine blade profile, a mandrel and a clamping screw, and a semicircular mounting groove is arranged on the opposite surface of the blade basin side clamping block and the blade back side clamping block, respectively, for inserting the mandrel. When the mandrel is in contact with the blade basin side clamping block and the blade back side clamping block at the same time, there is a gap between the blade basin side clamping block and the blade back side clamping block. The clamping screw is located below the clamping part and above the mounting groove, and is used for threadedly connecting with the blade basin side clamping block and the blade back side clamping block.

Description

Technical Field

[0001] This invention relates to the field of workpiece machining clamping tools, specifically a mechanism for floating clamping of gas turbine blade profiles. Background Technology

[0002] like Figure 1 The gas turbine blade shown includes a blade profile A and tenon B. During precision machining of the blade's rim, tenon B is typically used for positioning and clamping at one end. However, since this type of blade lacks a crown for clamping, using only the tenon for positioning results in a small positioning surface, insufficient clamping force, and inadequate clamping rigidity. To ensure sufficient system rigidity after blade clamping, further clamping of the blade profile is required. However, blade profile machining is limited by machining accuracy, resulting in errors in actual shape and dimensions compared to the theoretical design. Furthermore, due to machining deformation of the tenon from the previous process to the blade profile, clamping errors, etc., the actual position and angle of the blade profile deviate from the theoretical position. Therefore, a floating clamping mechanism for the blade profile needs to be designed to improve system clamping rigidity while ensuring the positioning accuracy of the blade tenon. Summary of the Invention

[0003] To address the issue that deviations in blade profiles can affect clamping rigidity, this invention provides a floating clamping mechanism for gas turbine blade profiles. This mechanism is convenient to use and ensures good clamping rigidity through floating clamping.

[0004] The technical solution is as follows: A mechanism for floating clamping of gas turbine blade profiles includes a blade basin-side clamping block, a blade back-side clamping block, a first clamping base for fixing the blade basin-side clamping block, and a second clamping base for fixing the blade back-side clamping block. The blade basin-side clamping block and the blade back-side clamping block have clamping portions on their upper parts for clamping the blade profile. The mechanism further includes a mandrel and clamping screws. Opposite surfaces of the blade basin-side clamping block and the blade back-side clamping block are respectively provided with opposing semi-circular mounting grooves. The mounting grooves are used to insert the mandrel. When the mandrel simultaneously contacts both the blade basin-side clamping block and the blade back-side clamping block, there is a gap between them. The clamping screws are located below the clamping portions and above the mounting grooves, and are used for threaded connection with the blade basin-side clamping block and the blade back-side clamping block.

[0005] Its further features are:

[0006] The guiding grooves are respectively arranged on the pressing base one and the pressing base two, the blade-pit-side clamping block is slidably connected with the pressing base one through the guiding grooves and is fixed on the pressing base one through the pressing mechanism one, and the blade-back-side clamping block is slidably connected with the pressing base two through the guiding grooves and is fixed on the pressing base two through the pressing mechanism two.

[0007] The pressing mechanism one and the pressing mechanism two respectively include a pressing screw and a locking pressing block, the pressing screw is threadedly connected with the locking pressing block after penetrating through the blade-pit-side clamping block / the blade-back-side clamping block, the pressing base one / the pressing base two.

[0008] The clamping part is a profiled surface.

[0009] The present application has the advantages that the position of the blade-pit-side clamping block and the blade-back-side clamping block is adjusted by cooperating with the pressing base, so that the clamping part is in contact with the blade profile, the gap is left between the two clamping blocks by inserting the mandrel, the clamping block can rotate around the mandrel in the process of tightening the clamping screw if there is an error in the blade profile, floating clamping is realized to make the clamping part fit the blade profile, the use is convenient, and good clamping rigidity can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic view of a blade structure.

[0011] Figure 2 It is a schematic view of the present application from the top.

[0012] Figure 3 It is a schematic view of the present application from the top. Figure 2

[0013] Figure 4 It is a schematic view of the present application from the top. DETAILED DESCRIPTION

[0014] As Figures 2-4 ​The device is used for floating clamping of turbine blade profile, which comprises a blade pressure side clamping block 6, a blade suction side clamping block 4, a first pressing base 9 for fixing the blade pressure side clamping block 6, a second pressing base 1 for fixing the blade suction side clamping block 4, a clamping part 11 provided on the upper part of the blade pressure side clamping block 6 and the blade suction side clamping block 4 for clamping the blade profile, the clamping part 11 is provided with a profiled surface corresponding to the standard blade profile shape, and the device further comprises a mandrel 5 and a clamping screw 10, a semi-circular mounting groove is provided on the opposite surface of the blade pressure side clamping block 6 and the blade suction side clamping block 4 respectively, the mounting groove is used for inserting the mandrel 5, when the mandrel 5 is in contact with the blade pressure side clamping block 6 and the blade suction side clamping block 4, there is a gap between the blade pressure side clamping block 6 and the blade suction side clamping block 4, the clamping screw 10 is located below the clamping part 11 and above the mounting groove, and is used for being screwed with the blade pressure side clamping block 6 and the blade suction side clamping block 4.

[0015] In addition, a guide groove 12 is provided on the first pressing base 9 and the second pressing base 1 respectively, the blade pressure side clamping block 6 is slidably connected with the first pressing base 9 through the guide groove 12 and is fixed on the first pressing base 9 through a first pressing mechanism, and the blade suction side clamping block 4 is slidably connected with the second pressing base 2 through the guide groove and is fixed on the second pressing base 2 through a second pressing mechanism. One of the forms of the pressing mechanism is that the first pressing mechanism and the second pressing mechanism respectively comprise a first pressing screw 7, a second pressing screw 3 and a first locking pressing block 8 and a second locking pressing block 2, the clamping block is locked by screwing the pressing screw through the clamping block and the base and being screwed with the locking pressing block. Of course, the form of the pressing screw and the pressing nut can also be adopted, the rod part of the pressing screw is connected with the pressing nut after penetrating through the waist-shaped groove in the clamping block and the base, and the clamping block is fixed on the base by tightening the pressing nut together with the head part of the screw when the clamping block needs to be fixed.

[0016] When the device is used for clamping the blade, the clamping blocks on both sides are pulled apart after the pressing mechanism is loosened, and then the blade is placed in, and then the clamping blocks are moved close to the blade, the mandrel and the clamping screw 10 are placed in during the moving process, the two clamping blocks are further close to each other and clamp the blade by tightening the clamping screw 10, and the gap between the two clamping blocks is caused by the mandrel, if the blade has an error, the clamping blocks can be rotated around the mandrel to make the profiled surface fit the blade profile when the clamping screw is tightened, and the blade pressure side clamping block 6 can be rotated clockwise and the blade suction side clamping block 4 can be rotated counterclockwise (taking the position in the figure as the reference) because the clamping screw 10 is located below the clamping part 11 and above the mounting groove, and it is worth mentioning that the error of the blade is often small, so the rotation angle is small, which will not cause the clamping block to be separated from the base and cannot be fixed, and then the clamping blocks are fixed on the base by the pressing mechanism, so that the clamping of the blade profile is completed, and the clamping rigidity and positioning accuracy are good. Figure 3

[0017] ​The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mechanism for floating clamping of blade profile of a combustion engine, comprising a blade pressure side clamping block, a blade suction side clamping block, a pressing base one for fixing the blade pressure side clamping block, a pressing base two for fixing the blade suction side clamping block, and a pressing mechanism; a pressing mechanism one and a pressing mechanism two; The compacting mechanism comprises: the blade pressure side clamping block is locked by the pressing mechanism one, and the blade suction side clamping block is locked by the pressing mechanism two; the blade pressure side clamping block and the blade suction side clamping block are provided with clamping portions for clamping the blade profile, characterized in that it further comprises a mandrel and a clamping screw, opposite faces of the blade pressure side clamping block and the blade suction side clamping block are respectively provided with oppositely arranged semicircular mounting grooves, the mounting grooves are used for inserting the mandrel, when the mandrel is in contact with the blade pressure side clamping block and the blade suction side clamping block at the same time, the blade pressure side clamping block and the blade suction side clamping block have a gap therebetween; the clamping screw is located below the clamping portion and above the mounting groove, and is used for threadedly connecting with the blade pressure side clamping block and the blade suction side clamping block; the clamping portion is a profiled surface; when clamping the blade, the pressing mechanism is loosened to pull apart the blade pressure side clamping block and the blade suction side clamping block on both sides and then place them into the blade, and then move the blade pressure side clamping block and the blade suction side clamping block to approach the blade, insert the mandrel and the clamping screw in the process of approaching, and rely on tightening the clamping screw to make the blade pressure side clamping block and the blade suction side clamping block further approach and clamp the blade, due to the existence of the mandrel, there is a gap between the blade pressure side clamping block and the blade suction side clamping block, if there is an error in the blade, the clamping block can be rotated around the mandrel when the clamping screw is tightened to make the profiled surface fit the blade profile, and at the same time, due to the fact that the clamping screw is located below the clamping portion and above the mounting groove, the blade pressure side clamping block can rotate clockwise and the blade suction side clamping block can rotate counterclockwise. the pressing base one and the pressing base two are respectively provided with guide grooves, the blade pressure side clamping block is slidably connected with the pressing base one through the guide grooves and is fixed on the pressing base one through the pressing mechanism one, and the blade suction side clamping block is slidably connected with the pressing base two through the guide grooves and is fixed on the pressing base two through the pressing mechanism two.

2. A mechanism for floating clamping of a vane profile of a combustion engine according to claim 1, characterized in that: the pressing mechanism one comprises a pressing screw one and a locking pressing block one, and the pressing mechanism two comprises a pressing screw two and a locking pressing block two; 3. A mechanism for floating clamping of a vane profile of a combustion engine according to claim 1, characterized in that: the pressing screw one is threadedly connected with the locking pressing block one after penetrating through the blade pressure side clamping block and the pressing base one; the pressing screw two is threadedly connected with the locking pressing block two after penetrating through the blade suction side clamping block and the pressing base two. ​

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