Steam turbine blade bending device
By using sealing and nitrogen treatment in the turbine blade bending device, the scale problem is solved, and the stability and processing efficiency of the blade are improved.
Patent Information
- Application Number
- CN202422366124.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-27
AI Technical Summary
During the bending process of steam turbine blades, the formation of oxide scales leads to a decrease in the effective load area of the blade, increase in stress concentration, and reduces the strength and stiffness of the blades.
A steam turbine blade bending device is adopted, and seal is achieved using the first cylinder and the connecting plate, and air in the connecting plate is discharged with nitrogen to prevent the formation of oxide scales, and the blades are uniformly cooled through the flow channel and the nozzle to improve stability.
It effectively avoids the formation of oxide scale, improves the stability and processing efficiency of the blades, and improves product quality.
Smart Images
Figure CN223264572U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bending devices, in particular to a turbine blade bending device. Background Art
[0002] Steam turbine blades are key components of steam turbines and play an extremely important role, responsible for converting the thermal energy of high-temperature steam into mechanical energy. The high-temperature, high-pressure steam impacts the blades, causing them to rotate the turbine's rotor, thereby converting energy and providing power for equipment such as generators.
[0003] When bending a turbine blade, the blade to be bent needs to be placed in a dedicated mold, heated, and pressurized to achieve its final shape. However, during the heating process, a layer of oxide scale will adhere to the surface of the heated turbine blade that comes into contact with the air. The presence of the oxide scale will reduce the effective load-bearing area of the blade. Since the oxide scale is generally brittle and has a weak bond with the blade substrate, it easily peels off when subjected to force, resulting in a reduction in the actual load-bearing area of the blade. This will increase the stress concentration of the blade during operation and reduce the strength and rigidity of the blade. Therefore, this application proposes a turbine blade bending device. Utility Model Content
[0004] The utility model aims to propose a turbine blade bending device to solve the problem in the background technology that oxidation scale is formed on the surface of the blade due to heating.
[0005] The technical solution of the utility model: a steam turbine blade bending device includes a base plate and also includes:
[0006] A support column, the support column is fixedly mounted on a base plate, a first cylinder is fixedly mounted on the support column, a piston rod of the first cylinder is fixedly mounted on a connecting plate, a second cylinder is fixedly mounted on the bottom of the connecting plate, a piston rod of the second cylinder is fixedly mounted on an extrusion plate, a heating platform is fixedly mounted on the base plate, a placement groove is provided in the heating platform, the placement groove is located directly below the level of the extrusion plate, and a protective device is provided on the connecting plate to prevent oxidation of the turbine blades in the placement groove during heating.
[0007] Optionally, the protective device includes a sealing plate fixedly mounted on the bottom of the connecting plate, a sealing groove is provided on the heating platform, the sealing plate is located in the sealing groove, an air storage tank is fixedly mounted on the support column, a connecting pipe is fixedly mounted on the air storage tank, one end of the connecting pipe is connected to the sealing plate, a one-way valve is fixedly mounted on the connecting plate, and an auxiliary mechanism for cooling the bent turbine blades is provided in the connecting plate.
[0008] Optionally, the auxiliary mechanism includes a guide tube fixedly installed on one side of the connecting tube, a third cylinder fixedly installed on one side of the sealing plate, a guide chamber fixedly installed on the piston rod of the third cylinder, the guide chamber is a hollow cavity, the guide chamber is connected to the guide tube, a plurality of nozzles arranged at equal distances are fixedly installed on the bottom of the guide chamber, and valves are fixedly installed on both the connecting tube and the guide tube.
[0009] Optionally, a top support plate is fixedly mounted on the support column, and the top support plate is fixedly connected to the first cylinder.
[0010] Optionally, guide frames are fixedly installed on both sides of the top support plate, guide grooves are provided on the guide frames, guide plates are fixedly installed on both sides of the connecting plate, protrusions are fixedly installed at both ends of the guide plates, and the protrusions are located in the guide grooves.
[0011] Optionally, a fixing plate is fixedly mounted on the support column, and the fixing plate is fixedly connected to the gas storage tank.
[0012] Optionally, a support foot is fixedly mounted on the bottom plate, and the support foot is fixedly connected to the heating platform.
[0013] In summary, this application includes at least one of the following beneficial technical effects:
[0014] The utility model drives the connecting plate and the sealing plate to seal the placement groove through the first cylinder, and then discharges the nitrogen in the gas storage tank into the connecting plate through the connecting pipe, and discharges the air in the connecting plate from the one-way valve, so that there is no air inside the connecting plate, thereby avoiding the occurrence of oxide scale when heating before the turbine blades are bent, and improving product quality.
[0015] Furthermore, nitrogen is transported from the guide pipe into the guide cavity and then sprayed out by the nozzle. The third cylinder drives the guide cavity to perform horizontal reciprocating motion, thereby uniformly cooling the bent turbine blades, improving blade stability and enhancing processing efficiency.
[0016] The utility model can avoid the generation of oxide scale in the turbine blades during the heating process, and improve the stability of the blades.
[0017] Qualitative, improve product quality and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of the structure of an embodiment of the present invention is given Figure 1 ;
[0019] Figure 2 A schematic diagram of the structure of an embodiment of the present invention is given Figure 2 ;
[0020] Figure 3Schematic diagram of the connecting plate, sealing plate and guide cavity structure.
[0021] Figure numerals: 1. Base plate; 2. Support column; 3. Top support plate; 4. First cylinder; 5. Guide frame; 6. Guide groove; 7. Connecting plate; 8. One-way valve; 9. Heating table; 10. Placement groove; 11. Sealing groove; 12. Sealing plate; 13. Fixing plate; 14. Gas storage tank; 15. Connecting pipe; 16. Guide pipe; 17. Valve; 18. Guide plate; 19. Bump; 20. Second cylinder; 21. Extrusion plate; 22. Third cylinder; 23. Guide chamber; 24. Nozzle; 25. Support foot. DETAILED DESCRIPTION
[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.
[0023] Example
[0024] like Figure 1-2 As shown, the turbine blade bending device proposed by the present invention includes a base plate 1 and a support column 2, which is fixedly mounted on the base plate 1. A first cylinder 4 is fixedly mounted on the support column 2, and a connecting plate 7 is fixedly mounted on the piston rod of the first cylinder 4. A second cylinder 20 is fixedly mounted on the bottom of the connecting plate 7, and an extrusion plate 21 is fixedly mounted on the piston rod of the second cylinder 20. A heating table 9 is fixedly mounted on the base plate 1 for heating the turbine blade to be bent, and a placement groove 10 is provided in the heating table 9 for placing the blade to be bent. The steam turbine blades are placed in the placement groove 10, and the heating platform 9 is started to heat the steam turbine blades. The first cylinder 4 is started, and the piston rod of the first cylinder 4 drives the connecting plate 7 to move downward. The second cylinder 20 is started, and the piston rod of the second cylinder 20 drives the extrusion plate 21 to extrude the steam turbine blades in the placement groove 10 and bend them into shape. A protective device is provided on the connecting plate 7 to prevent oxidation of the steam turbine blades in the placement groove 10 during the heating process.
[0025] like Figure 2-3As shown, this embodiment also includes a protective device, which includes a sealing plate 12 fixedly mounted on the bottom of the connecting plate 7, a sealing groove 11 is opened on the heating table 9, and the sealing plate 12 is located in the sealing groove 11, which is used to seal the inside of the connecting plate 7, and a gas storage tank 14 is fixedly mounted on the support column 2 for storing nitrogen. A connecting pipe 15 is fixedly mounted on the gas storage tank 14, and one end of the connecting pipe 15 is connected to the sealing plate 12. A one-way valve 8 is fixedly mounted on the connecting plate 7, and the one-way valve 8 can only exhaust gas outward, and then the turbine blades are Before heating, start the first cylinder 4, and the piston rod of the first cylinder 4 drives the connecting plate 7 to move downward to seal the heating platform 9. The valve on the connecting pipe 15 is opened to deliver nitrogen to the connecting plate 7. As the nitrogen is continuously input, the air in the connecting plate 7 is discharged from the one-way valve so that there is no air in the connecting plate 7. At this time, the heating platform 9 is started again to heat the turbine blades to avoid the formation of oxide scale on the surface of the turbine blades when they come into contact with the air. An auxiliary mechanism is provided in the connecting plate 7 to cool the bent turbine blades.
[0026] like Figure 2-3 As shown, this embodiment also includes an auxiliary mechanism, which includes a guide pipe 16 fixedly installed on one side of the connecting pipe 15, a third cylinder 22 fixedly installed on one side of the sealing plate 12, and a guide chamber 23 fixedly installed on the piston rod of the third cylinder 22. The guide chamber 23 is a cavity setting, and the guide chamber 23 is connected to the guide pipe 16. A plurality of nozzles 24 arranged at equal distances are fixedly installed at the bottom of the guide chamber 23. Valves 17 are fixedly installed on both the connecting pipe 15 and the guide pipe 16. After heating is completed, the valve on the connecting pipe 15 is closed, and the valve on the guide pipe 16 is opened. Nitrogen enters the guide chamber 23 from the guide pipe 16, and the third cylinder 22 is started. The third cylinder 22 drives the guide chamber 23 to reciprocate in the horizontal direction. The nitrogen sprayed by the nozzle 24 cools the bent turbine blades, eliminates residual stress, and improves stability.
[0027] like Figure 1-2 As shown, a top support plate 3 is fixedly mounted on the support column 2, and the top support plate 3 is fixedly connected to the first cylinder 4. Guide frames 5 are fixedly mounted on both sides of the top support plate 3, and a guide groove 6 is provided on the guide frame 5. Guide plates 18 are fixedly mounted on both sides of the connecting plate 7, and protrusions 19 are fixedly mounted at both ends of the guide plate 18, and the protrusions 19 are located in the guide groove 6. A fixing plate 13 is fixedly mounted on the support column 2, and the fixing plate 13 is fixedly connected to the gas tank 14. A support leg 25 is fixedly mounted on the bottom plate 1, and the support leg 25 is fixedly connected to the heating table 9.
[0028] The working principle of this embodiment is as follows: the turbine blade to be bent is placed in the placement groove 10, the first cylinder 4 is started, the piston rod of the first cylinder 4 drives the connecting plate 7 to move downward, the heating table 9 is sealed, the valve on the connecting pipe 15 is opened, nitrogen is delivered to the connecting plate 7, and as the nitrogen is continuously input, the air in the connecting plate 7 is discharged from the one-way valve so that there is no air in the connecting plate 7. At this time, the heating table 9 is started again to heat the turbine blade, the second cylinder 20 is started, and the piston rod of the second cylinder 20 drives the extrusion plate 21 squeezes the turbine blades in the placement groove 10 and bends them into shape. After bending and forming, the valve on the connecting pipe 15 is closed, and the valve on the guide pipe 16 is opened. Nitrogen enters the guide cavity 23 from the guide pipe 16, and the third cylinder 22 is started. The third cylinder 22 drives the guide cavity 23 to reciprocate in the horizontal direction. The nitrogen sprayed by the nozzle 24 cools the bent turbine blades, thereby avoiding the generation of oxide scale on the turbine blades during the heating process, improving the stability of the blades, improving the product quality, and improving the processing efficiency.
[0029] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A steam turbine blade bending device, comprising a base plate (1), characterized in that: Also includes: A support column (2) is fixedly mounted on a base plate (1); a first cylinder (4) is fixedly mounted on the support column (2); a piston rod of the first cylinder (4) is fixedly mounted on a connecting plate (7); a second cylinder (20) is fixedly mounted on the bottom of the connecting plate (7); a piston rod of the second cylinder (20) is fixedly mounted on an extrusion plate (21); a heating platform (9) is fixedly mounted on the base plate (1); a placement groove (10) is provided in the heating platform (9); the placement groove (10) is located directly below the level of the extrusion plate (21); and a protective device is provided on the connecting plate (7) to prevent oxidation of turbine blades in the placement groove (10) during heating.
2. The steam turbine blade bending device according to claim 1, characterized in that: The protective device comprises a sealing plate (12) fixedly mounted on the bottom of the connecting plate (7); a sealing groove (11) is provided on the heating platform (9); the sealing plate (12) is located in the sealing groove (11); a gas storage tank (14) is fixedly mounted on the support column (2); a connecting pipe (15) is fixedly mounted on the gas storage tank (14); one end of the connecting pipe (15) is communicated with the sealing plate (12); a one-way valve (8) is fixedly mounted on the connecting plate (7); and an auxiliary mechanism for cooling the bent turbine blades is provided in the connecting plate (7).
3. The steam turbine blade bending device according to claim 2, characterized in that: The auxiliary mechanism includes a guide tube (16) fixedly mounted on one side of the connecting tube (15); a third cylinder (22) fixedly mounted on one side of the sealing plate (12); a guide chamber (23) fixedly mounted on the piston rod of the third cylinder (22); the guide chamber (23) is a hollow cavity, the guide chamber (23) is connected to the guide tube (16); a plurality of nozzles (24) arranged at equal distances are fixedly mounted on the bottom of the guide chamber (23); and valves (17) are fixedly mounted on both the connecting tube (15) and the guide tube (16).
4. The steam turbine blade bending device according to claim 1, characterized in that: A top support plate (3) is fixedly mounted on the support column (2), and the top support plate (3) is fixedly connected to the first cylinder (4).
5. The steam turbine blade bending device according to claim 1, characterized in that: Guide frames (5) are fixedly mounted on both sides of the supporting plate (3), and guide grooves (6) are provided on the guide frames (5). Guide plates (18) are fixedly mounted on both sides of the connecting plate (7), and protrusions (19) are fixedly mounted on both ends of the guide plates (18), and the protrusions (19) are located in the guide grooves (6).
6. The steam turbine blade bending device according to claim 1, characterized in that: A fixing plate (13) is fixedly mounted on the support column (2), and the fixing plate (13) is fixedly connected to the gas storage tank (14).
7. The steam turbine blade bending device according to claim 1, characterized in that: A support foot (25) is fixedly mounted on the bottom plate (1), and the support foot (25) is fixedly connected to the heating platform (9).