Positioning and clamping mechanism for turbine blade polishing

Abstract

The utility model belongs to the technical field of steam turbine blade machining, particularly relates to a positioning and clamping mechanism for steam turbine blade polishing, and provides the following scheme that a limiting seat can slide along a sliding groove, penetrates through a positioning table through a first screw rod, and limits the degree of freedom of the limiting seat moving towards one side through a nut on the first screw rod; the second screw is rotationally installed at the bottom of the lifting base and is in threaded connection with one side of the top face of the positioning table, the first limiting end is rotationally installed on the lifting base, and the first pressure applying part is rotationally installed on the first limiting end. The first limiting end and the second limiting end are arranged to be in the rotating state, the blade body can be placed and taken down without hindrance, the blade body can be rapidly placed, the blade root of the blade body can be limited in multiple directions, it is guaranteed that the blade body is stably limited, and follow-up polishing treatment on the blade body is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade processing technology, and in particular to a positioning and clamping mechanism for polishing turbine blades. Background Technology

[0002] The turbine blades are key components of the steam turbine, and also one of the most delicate and important components. They withstand the combined effects of high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, as well as water droplet erosion in the wet steam zone under extremely harsh conditions. Their aerodynamic performance, machining geometry, surface roughness, installation clearance, operating conditions, and scaling all affect the efficiency and output of the steam turbine. Their structural design, vibration intensity, and operating mode have a decisive impact on the safety and reliability of the unit.

[0003] The production of steam turbine blades requires polishing. However, the irregular structure of steam turbine blades makes fixing them relatively troublesome. Commonly used fixing devices are prone to loosening during processing, which affects the polishing process. Therefore, there is an urgent need for a positioning and clamping mechanism for steam turbine blade polishing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a positioning and clamping mechanism for polishing steam turbine blades, thereby solving the problems mentioned in the background section.

[0005] A positioning and clamping mechanism for polishing steam turbine blades includes a worktable and a positioning mechanism mounted on the worktable. The positioning mechanism includes a positioning table, a fixed seat, a limiting seat, a first screw, a second screw, a lifting seat, a first limiting end, a first pressure application part, a second limiting end, a second pressure application part, a limiting head, and a third screw. The fixed seat is installed at an opening on one side of the positioning table. The limiting seat can slide along a groove and passes through the positioning table via the first screw, and its freedom of movement to one side is restricted by a nut on the first screw. The second screw is rotatably mounted on the bottom of the lifting seat and threadedly connected to one side of the top surface of the positioning table. The first limiting end is rotatably mounted on the lifting seat. The first pressure application part is rotatably mounted on the first limiting end. The second limiting end is fixed to the other side of the top surface of the positioning table. The second pressure application part is rotatably mounted on the second limiting end. The third screw consists of two opposing screws rotatably mounted on both sides of the worktable. The limiting head is rotatably mounted at the end of the third screw.

[0006] By adopting the above technical solution, the device can quickly place the blade body and limit the blade root in multiple directions to ensure that the blade body is stably restricted, so as to facilitate the subsequent polishing process of the blade body.

[0007] The positioning table is arranged in a "C" - shaped structure. Slot holes with a diameter adapted to the maximum diameter of the limiting head are provided on both side walls of the central opening of the positioning table. The limiting head is arranged in a frustum - of - a - cone structure.

[0008] By adopting the above - mentioned technical solution, it is convenient to place and position the blade body.

[0009] The upper end surface of the limiting seat is arranged as an inclined surface.

[0010] By adopting the above - mentioned technical solution, the blade body can be limited in multiple directions.

[0011] The lower end part of the second limiting end is of a cylindrical structure, and the upper end part is of a straight - plate structure. The straight - plate structure is rotatably installed on the cylindrical structure.

[0012] By adopting the above - mentioned technical solution, it is convenient to adjust the second pressing part and remove the processed blade body.

[0013] Both the first pressing part and the second pressing part are composed of a screw rod and a fitting block. The fitting block is rotatably connected to the screw rod, and the bottom of the fitting block is arranged as an inclined surface.

[0014] By adopting the above - mentioned technical solution, downward pressure is applied to the blade root of the blade body for limitation.

[0015] The beneficial effects of the positioning and clamping mechanism for polishing steam turbine blades of the present utility model are as follows:

[0016] By setting the first limiting end and the second limiting end in a rotating state, the blade body can be placed and removed without obstruction, achieving rapid placement of the blade body. Moreover, the blade root of the blade body can be limited in multiple directions, ensuring that the blade body is stably restricted, so as to facilitate subsequent polishing treatment of the blade body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the first - perspective view when the positioning and clamping mechanism for polishing steam turbine blades of the present utility model places the blade body;

[0018] Figure 2 is the second - perspective view when the positioning and clamping mechanism for polishing steam turbine blades of the present utility model places the blade body;

[0019] Figure 3 is the overall view of the positioning and clamping mechanism for polishing steam turbine blades of the present utility model;

[0020] Figure 4 is another perspective view of the positioning and clamping mechanism for polishing steam turbine blades of the present utility model.

[0021] In the diagram: 1. Workbench; 2. Positioning table; 3. Fixed seat; 301. Slide groove; 4. Limiting seat; 5. Screw 1; 6. Screw 2; 7. Lifting seat; 8. Limiting end 1; 9. Pressure application part 1; 10. Limiting end 2; 11. Pressure application part 2; 12. Limiting head; 13. Screw 3; 14. Blade body. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0023] Reference Figure 1-4 A positioning and clamping mechanism for polishing steam turbine blades includes a worktable 1 and a positioning mechanism mounted on the worktable 1. The positioning mechanism includes a positioning table 2, a fixed seat 3, a limiting seat 4, a first screw 5, a second screw 6, a lifting seat 7, a first limiting end 8, a first pressure part 9, a second limiting end 10, a second pressure part 11, a limiting head 12, and a third screw 13. The fixed seat 3 is installed at an opening on one side of the positioning table 2. The limiting seat 4 can slide along a slide groove 301 and passes through the positioning table 2 via the first screw 5. The nut on screw 5 restricts its freedom of movement to one side. Screw 6 is rotatably mounted on the bottom of the lifting seat 7 and threadedly connected to one side of the top surface of the positioning table 2. Limiting end 8 is rotatably mounted on the lifting seat 7. Pressing part 9 is rotatably mounted on limiting end 8. Limiting end 10 is fixed to the other side of the top surface of the positioning table 2. Pressing part 11 is rotatably mounted on limiting end 10. Screw 3 13 consists of two opposing rotatably mounted on both sides of the worktable 1. Limiting head 12 is rotatably mounted on the end of screw 3 13.

[0024] The blade body 14 is arranged as follows: Figure 1 As shown, the leaf root is placed in the positioning platform 2, and one edge of the leaf root rests on the positioning platform 2. The screw 13 is rotated to push the limiting head 12 toward the round hole at the leaf root, so that the end of the limiting head 12 is embedded in the round hole at the leaf root, thus initially defining the blade body 14.

[0025] Rotate the second screw rod 6 to adjust the height of the lifting seat 7, so that one side of the lifting seat 7 supports the other end edge of the blade root of the blade body 14. Then, rotate the upper end plate of the second limiting end 10 to move the second pressing part 11 above the blade root of the blade body 14, and rotate the second pressing part 11 to make the fitting block at the bottom of the second pressing part 11 closely adhere to the blade root of the blade body 14. Rotate the first limiting end 8 to move the first pressing part 9 above the blade root of the blade body 14, and rotate the first pressing part 9 to make the fitting block at the bottom of the first pressing part 9 closely adhere to the blade root of the blade body 14, further limiting the blade body 14. The upper end surface of the limiting seat 4 is inclined. Push the limiting seat 4 to pass the first screw rod 5 through the blade root of the blade body 14 and out from the other side of the positioning table 2 until the inclined surface of the limiting seat 4 abuts against the blade root of the blade body 14. Limit the movement of the first screw rod 5 through a nut, and the complete limitation of the blade body 14 can be completed;

[0026] Subsequently, through an external polishing device, manual polishing or polishing with the cooperation of a manipulator can be carried out;

[0027] This device can quickly place the blade body 14 and limit the blade root of the blade body 14 in multiple directions, ensuring that the blade body 14 is stably restricted, so as to facilitate the subsequent polishing treatment of the blade body 14.

[0028] The positioning table 2 is arranged in a "C" - shaped structure. Slot holes with a diameter adapted to the maximum diameter of the limiting head 12 are opened at the two side walls of the middle opening of the positioning table 2. The limiting head 12 is arranged in a frustum - shaped structure; so as to rotate the third screw rod 13 to adjust the position of the limiting head 12 and limit the round - hole part of the blade root of the blade body 14 through the limiting head 12.

[0029] The lower end part of the second limiting end 10 is of a cylindrical structure, and the upper end part is of a straight - plate structure. The straight - plate structure is rotatably installed on the cylindrical structure; so as to adjust the second pressing part 11 and remove the processed blade body 14.

[0030] Both the first pressing part 9 and the second pressing part 11 are composed of a screw rod and a fitting block. The fitting block is rotatably connected to the screw rod, and the bottom of the fitting block is inclined. So as to adjust the downward pressure exerted by the first pressing part 9 and the second pressing part 11 on the blade root of the blade body 14, and the bottom of the fitting block is inclined so as to fit the blade root of the blade body 14.

[0031] The above - described embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A positioning and clamping mechanism for polishing a steam turbine blade, comprising a worktable (1) and a positioning mechanism mounted on the worktable (1), characterized in that: Said positioning mechanism comprises a positioning table (2), a fixing base (3), a limiting base (4), a screw rod one (5), a screw rod two (6), a lifting base (7), a limiting end one (8), a pressure applying part one (9), a limiting end two (10), a pressure applying part two (11), a limiting head (12) and a screw rod three (13), the fixing base (3) is installed at one side opening of the positioning table (2), the limiting base (4) can slide along the sliding groove (301), and passes through the positioning table (2) through the screw rod one (5), and the freedom of moving to one side is limited through the nut on the screw rod one (5), the screw rod two (6) is rotationally installed at the bottom of the lifting base (7) and is screw connected with one side of the top surface of the positioning table (2), the limiting end one (8) is rotationally installed on the lifting base (7), the pressure applying part one (9) is rotationally installed on the limiting end one (8), the limiting end two (10) is fixed on the other side of the top surface of the positioning table (2), the pressure applying part two (11) is rotationally installed on the limiting end two (10), the screw rod three (13) is rotationally installed on two sides of the workbench (1), and the limiting head (12) is rotationally installed on the end of the screw rod three (13).

2. A positioning and clamping mechanism for polishing of a steam turbine blade according to claim 1, characterized in that: Said positioning table (2) is arranged in a " " character shape structure, groove holes with diameters matched with the maximum diameter of the limiting head (12) are arranged at the two side walls of the opening in the middle of the positioning table (2), and the limiting head (12) is arranged in a circular table structure.

3. A positioning and clamping mechanism for polishing of a turbine blade according to claim 2, characterized in that: The upper end surface of the limiting base (4) is arranged in an inclined surface.

4. A positioning and clamping mechanism for polishing of a turbine blade according to claim 3, characterized in that: The lower end of the limiting end two (10) is arranged in a cylindrical structure, and the upper end is arranged in a straight plate structure rotationally installed on the cylindrical structure.

5. A positioning and clamping mechanism for polishing of a turbine blade according to claim 4, characterized in that: Said pressure applying part one (9) and pressure applying part two (11) are both composed of screw rods and abutting blocks, the abutting blocks are rotationally connected with the screw rods, and the bottom of the abutting block is arranged in an inclined surface.

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