Clamping and fixing inspection tool for turbine blade of gas turbine

Abstract

The utility model provides a gas turbine blade clamping and fixing inspection tool. The gas turbine blade clamping and fixing inspection tool comprises a bottom plate, one side of the bottom plate is provided with a positioning bolt, the upper end of the other side of the bottom plate is provided with an adjustable positioning plate, and the lower end is provided with a positioning bolt; three square grooves are evenly distributed in the middle of the bottom plate, the three bases are fixed to the square grooves, a threaded hole is formed in the middle square groove, and an inner hexagon bolt B is installed in the threaded hole. The base mortise is fixedly provided with a shape follow-up baffle; an adapter block and an upper block are sequentially connected to the upper portion of the base, two threaded holes are formed in the upper block, and the base, the adapter block and the upper block are fixed through hexagon socket screws F. According to the utility model, in the process of inspecting the turbine blades by the three-coordinate measuring machine, the blades do not need to be clamped for many times, three turbine blades can be inspected at one time, the inspection efficiency is higher, the repeatability is good, the accurate inspection can be realized, and the economical efficiency and the practicability are considerable.

Description

Technical Field

[0001] The utility model belongs to the field of gas turbine blades, and in particular relates to a gas turbine blade clamping and fixing inspection tool. Background Art

[0002] During the inspection of gas turbine turbine 1 and turbine 2, the dimensions of the blade tenon, blade body line, and blade crown contour are inspected. A three-coordinate measuring machine is used for programming inspection. Before the inspection, the blade needs to be fixed on the marble platform of the three-coordinate measuring machine, multi-point positioning is performed, and a coordinate system is constructed. Since the blade tenon is an irregular shape, the three-coordinate measuring machine does not have a dedicated clamping and positioning tooling. Currently, hot melt adhesive is used to bond it to the bottom of the turbine blade tenon. During the measurement process, the turbine blade positioning is unstable and it is easy to shift after being subjected to force. After the inspection is completed, the hot melt adhesive residue at the bottom of the turbine blade tenon needs to be cleaned, and repositioning is required before each measurement. The inspection efficiency is low. Utility Model Content

[0003] The purpose of the utility model is to provide a tool for clamping, fixing and inspecting turbine blades of a gas turbine.

[0004] A gas turbine turbine blade clamping and fixing inspection tool, comprising a base plate; a positioning bolt is installed on one side of the base plate, an adjustable positioning plate is installed on the upper end of the other side, and a positioning bolt is installed on the lower end; three square grooves are evenly distributed in the middle position of the base plate, three bases are fixed on the square grooves, the middle square groove is provided with a threaded hole, and the threaded hole is installed with a hexagon socket bolt B; a follow-up baffle is fixedly installed on the base tenon groove; an adapter block and an upper forming block are connected to the top of the base in sequence, and two threaded holes are provided in the upper forming block, and the base is fixed to the adapter block and the upper forming block by hexagon socket bolts F.

[0005] Furthermore, a round washer and a hexagon socket bolt G are installed above the positioning bolt, the hexagon socket bolt G is inserted into the inner circular hole of the positioning bolt, and a clearance fit is adopted. The positioning bolt is inserted into the positioning hole of the marble platform provided with the three-dimensional coordinate measuring machine.

[0006] Furthermore, the adjustable positioning plate is fastened by four hexagon socket bolts, a round washer and hexagon socket bolt E are installed above the adjustable positioning plate, the hexagon socket bolt E is inserted into the inner circular hole of the positioning bolt, and a clearance fit is adopted, so that the adjustable positioning plate can be slightly adjusted in the horizontal direction.

[0007] Furthermore, the conformable baffle is fastened to the base by two pins and one hexagon socket bolt A. The pins are installed with interference fit. The conformable baffle is used to install the blade on the tooling, and the tenon root of the blade on one side is against the conformable baffle.

[0008] Furthermore, a threaded hole is opened on the side of the base and a hand-tightening bolt is installed. When the blade is installed on the tooling, the hand-tightening bolt is tightened and pressed against the bottom of the blade tenon root to fix it.

[0009] Furthermore, the top of the base is cross-shaped, and the two mating surfaces of the adapter block are cross-shaped grooves, which adopt a mortise and tenon structure to prevent stringing.

[0010] Furthermore, the mating surface on the other side of the adapter block for installation with the upper block 1 is also a mortise and tenon structure with a cross-shaped groove.

[0011] The beneficial effects of the present invention are:

[0012] The utility model can realize that during the process of inspecting turbine blades with a three-coordinate measuring machine, there is no need to clamp the blades multiple times, and three turbine blades can be inspected at one time, with high inspection efficiency and good repeatability, and can achieve precise inspection, with considerable economy and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram A of the utility model;

[0014] Figure 2 This is a structural diagram B of the utility model;

[0015] Figure 3 It is a three-dimensional diagram of the present utility model;

[0016] In the figure: 1. Upper forming block, 2. Adapter block, 3. Thumb bolt, 4. Base, 5. Pin, 6. Hexagon socket bolt A, 7. Bottom plate, 8. Hexagon socket bolt B, 9. Conformal baffle, 10. Hexagon socket bolt C, 11. Hexagon socket bolt D, 12. Hexagon socket bolt E, 13. Round washer, 14. Adjustable positioning block, 15. Positioning bolt, 16. Hexagon socket bolt F, 17. Hexagon socket bolt G. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figure 1-Figure 3As shown, a gas turbine turbine blade clamping and fixing inspection tool is provided. A positioning bolt 15 is installed on one side of the base plate 7. A round washer 13 and a hexagon socket bolt G17 are installed above the positioning bolt 15. The hexagon socket bolt G17 is inserted into the inner circular hole of the positioning bolt 15 with a clearance fit. The positioning bolt 15 can be inserted into the positioning hole of the marble platform provided with the three-dimensional coordinate measuring machine; an adjustable positioning plate 14 is installed on the other side of the base plate 7 and is fastened by four hexagon socket bolts 11. The positioning bolt 15 is installed below the adjustable positioning plate 14, and a round washer 13 and a hexagon socket bolt E12 are installed above the adjustable positioning plate 14. The hexagon socket bolt E12 is inserted into the inner circular hole of the positioning bolt 15 with a clearance fit. The adjustable positioning plate 14 can be slightly adjusted in the horizontal direction. When the tool is placed on the marble platform of the three-dimensional coordinate measuring machine, it is used to straighten the placement of the tool. After the adjustment is completed, the hexagon socket bolt E12 on the top is tightened;

[0019] Three square grooves are evenly distributed in the middle of the bottom plate 7 for mounting three bases 4, which are fastened by hexagon socket bolts C10. The middle square groove has a threaded hole in the middle for mounting hexagon socket bolts 8, which are used to fix the tooling on the marble platform of the three-dimensional coordinate measuring machine. A follow-up baffle 9 is placed in the mortise and tenon of the base 4. The follow-up baffle 9 is fastened to the base 4 with two pins 5 and one hexagon socket bolt A6. The pin 5 is installed with an interference fit. The follow-up baffle 9 is used to install the blade on the tooling, and the tenon root of the blade on one side is against the follow-up baffle 9.

[0020] A threaded hole is opened on the side of the base 4, and a hand-tightening bolt 3 is installed. When the blade is installed on the tooling, the hand-tightening bolt 3 is tightened and pressed against the bottom of the blade tenon to fix it; the top of the base 4 is cross-shaped, and the two mating surfaces of the adapter block 2 are both cross-shaped grooves, using a mortise and tenon structure to prevent stringing; the mating surface on the other side of the adapter block 2 is installed with the upper block 1, and the mortise and tenon structure with a cross-shaped groove is also applicable. Two threaded holes are opened on the top of the upper block 1 for installing two hexagon socket bolts F16. The hexagon socket bolts F16 are used to connect the upper block 1, the adapter block 2, and the base 4 into one. The function of the adapter block 2 is mainly to adjust the distance between the upper block 1 and the base 4.

[0021] When measuring blades with different tenon root lengths, adjustments are made by disassembly and assembly. When measuring the movement of turbine 1, the adapter block 2 is removed to shorten the distance between the upper block 1 and the base 4. When measuring the movement of turbine 2, the adapter block 2 needs to be installed to increase the distance.

[0022] It can measure the turbine 1 and turbine 2 moving blades at the same time, and can freely combine and clamp the turbine blades.

[0023] The base 4 and the upper shape block 1 are manufactured with the upper tolerance of the blade tenon. When the blade is installed, if it cannot be installed smoothly, it can be roughly determined whether the size of the blade tenon is out of tolerance.

[0024] The following describes the working steps of the utility model in detail:

[0025] Step 1: Place the tooling on the marble platform of the coordinate measuring machine;

[0026] Step 2: Install the hexagon socket bolts F17 and B8 into the bolt holes on the marble platform;

[0027] Step 3: Loosen the hexagon socket bolts D11 and E12, adjust the adjustable positioning block 14 to ensure that the tooling is straight on the platform, and then tighten the hexagon socket bolts D11 and E12;

[0028] Step 4: Disassemble and assemble adapter block 2 according to the different lengths of the tenon roots of the turbine blades to be measured. When measuring the movement of turbine 1, remove adapter block 2. When measuring the movement of turbine 2, install adapter block 2.

[0029] Step 5: Tighten the turbine blades installed on the fixture by hand with bolts 3 to prevent the blades from moving;

[0030] Step 6: Use a coordinate measuring machine to inspect the turbine blades on the tooling.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas turbine blade clamping and fixing inspection tool, characterized in that: The invention comprises a base plate (7); a positioning bolt (15) is installed on one side of the base plate (7); an adjustable positioning plate (14) is installed on the upper end of the other side; a positioning bolt (15) is installed on the lower end; three square grooves are evenly distributed in the middle position of the base plate (7); three bases (4) are fixed on the square grooves; the middle square groove is provided with a threaded hole, and the threaded hole is provided with a hexagonal bolt B (8); a follower baffle (9) is fixedly installed in the mortise and tenon of the base (4); the upper part of the base (4) is connected to the adapter block (2) and the upper forming block (1) in sequence, and the upper forming block (1) is provided with two threaded holes, and the base (4) is fixed to the adapter block (2) and the upper forming block (1) by the hexagonal bolt F (16).

2. A gas turbine blade clamping and inspection tool according to claim 1, characterized in that: A circular washer (13) and a hexagon socket bolt G (17) are installed above the positioning bolt (15); the hexagon socket bolt G (17) is inserted into the inner circular hole of the positioning bolt (15) with clearance fit; and the positioning bolt (15) is inserted into the positioning hole of the marble platform of the three-coordinate measuring machine.

3. The gas turbine blade clamping and fixing inspection tool according to claim 1, characterized in that: The adjustable positioning plate (14) is fastened by four hexagon socket bolts. A round washer (13) and a hexagon socket bolt E (12) are installed above the adjustable positioning plate (14). The hexagon socket bolt E (12) is inserted into the inner circular hole of the positioning bolt (15) with a clearance fit. The adjustable positioning plate (14) can be slightly adjusted in the horizontal direction.

4. A gas turbine blade clamping and inspection tool according to claim 1, characterized in that: The conformable baffle (9) is fastened to the base (4) by two pins (5) and one hexagon socket bolt A (6), the pin (5) being installed by interference fit, and the conformable baffle (9) is used for installing the blade on the tooling, with the tenon root of one side of the blade resting on the conformable baffle (9).

5. The gas turbine blade clamping and fixing inspection tool according to claim 1, characterized in that: The base (4) has a threaded hole on its side and a hand-tightening bolt (3) installed thereon. When the blade is mounted on the fixture, the hand-tightening bolt (3) is screwed and pressed against the bottom of the blade tenon to secure it.

6. The gas turbine blade clamping and fixing inspection tool according to claim 1, characterized in that: The top of the base (4) is cross-shaped, and the two matching surfaces of the adapter block (2) are cross-shaped grooves, which adopt a mortise and tenon structure to prevent stringing.

7. A gas turbine blade clamping and inspection tool according to claim 6, characterized in that: The matching surface on the other side of the adapter block (2) for installation with the upper block (1) is also a mortise and tenon structure with a cross-shaped groove.

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