Low-load optimized turbine blade

Abstract

The invention discloses a low-load optimized steam turbine blade which comprises a steam turbine blade body, a blade body, a blade root, a blade crown, a protection structure and a reinforcing structure. The blade is installed on the blade root, the blade crown is installed on the blade, the protection structure is installed on the blade, and the reinforcing structure is installed on the blade root. The turbine blade relates to the technical field of thermal power plant turbines, and has the following beneficial effects that the novel structural design is reasonable, installation is firmer, the turbine blade body has better resistance to high temperature and deformation, the load of the turbine blade is reduced, the service life of the turbine blade is prolonged, the whole is reinforced and protected through the protection structure, and the service life of the turbine blade is prolonged. The service life of the blade is prolonged, positioning of the adjacent blade roots is achieved through the reinforcing structures, meanwhile, transverse movement of the blade is avoided, and precision is improved.

Description

Technical Field

[0001] This invention relates to the field of steam turbine technology for thermal power plants, specifically to a steam turbine blade optimized for low load. Background Technology

[0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. It is also known as a steam turbine and is mainly used as a prime mover for power generation. It can also directly drive various pumps, fans, compressors and ship propellers. The exhaust steam or intermediate extraction steam from the steam turbine can also be used to meet the heating needs of production and daily life. Turbine blades are crucial components of steam turbine generator sets. The working environment of turbine blades is complex and variable. They endure extremely harsh conditions, including high temperature, high pressure, immense centrifugal force, steam force, steam oscillation force, corrosion, and erosion from water droplets in wet steam zones. At high temperatures, the mechanical properties of metallic turbine blades significantly decrease, primarily manifested in reduced tensile, torsional, and fatigue resistance. Furthermore, prolonged exposure to high temperatures alters the internal microstructure of the blade, leading to the formation and aggregation of intergranular voids and resulting in high-temperature creep failure. Therefore, we designed a low-load optimized turbine blade. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solution: a low-load optimized steam turbine blade, comprising a steam turbine blade body, a blade, a blade root, a blade crown, a protective structure, and a reinforcing structure; the blade is mounted on the blade root, the blade crown is mounted on the blade, the protective structure is mounted on the blade, and the reinforcing structure is mounted on the blade root.

[0004] Preferably, the protective structure includes: an antioxidant coating, a reinforcing layer, a high-temperature resistant layer, and a wear-resistant layer; A high-temperature resistant layer is applied to the blades, a reinforcement layer is installed on top of the high-temperature resistant layer, an anti-oxidation coating is applied to the reinforcement layer, and a wear-resistant layer is applied to the anti-oxidation layer.

[0005] Preferably, the cross-section of the blade is arc-shaped.

[0006] Preferably, the blade is provided with reinforcing ribs.

[0007] Preferably, the reinforcing structure includes: a fixing block and a positioning groove; The fixing block is installed on the blade root, and the fixing groove is opened at the position opposite to the blade root and the fixing block.

[0008] Preferably, the cross-section of the fixing block is arc-shaped.

[0009] Beneficial effects This invention provides a low-load optimized turbine blade, which has the following advantages compared with existing technologies: The invention features a reasonable structural design, resulting in a more robust installation. The turbine blades exhibit better resistance to high temperatures and deformation, reducing the load on the turbine blades and extending their service life. The protective structure provides overall reinforcement and protection, further enhancing the blades' lifespan. The reinforced structure also enables the positioning of adjacent blade roots, preventing lateral movement of the blades and improving accuracy. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of a low-load optimized steam turbine blade according to the present invention.

[0011] Figure 2 This is a schematic diagram of a protective structure for a turbine blade optimized for low load according to the present invention.

[0012] In the figure: 1. Turbine blade body; 2. Blade; 3. Blade root; 4. Blade crown; 5. Wear-resistant layer; 6. Fixing block; 7. Positioning groove; 8. Anti-oxidation coating; 9. Reinforcing layer; 10. High-temperature resistant layer. Detailed Implementation

[0013] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-2 The present invention provides a technical solution.

[0015] Example 1: Please see the appendix Figure 1-2 In the specific implementation process: a low-load optimized steam turbine blade includes a steam turbine blade 2, a body 1, a blade 2, a blade root 3, a blade crown 4, a protective structure, and a reinforcing structure; The feature is that the blade 2 is mounted on the blade root 3, the blade crown 4 is mounted on the blade 2, the protective structure is mounted on the blade 2, and the reinforcing structure is mounted on the blade root 3.

[0016] It should be noted that the turbine blade 2 body 1 is mounted around the rotor. The reinforcing structures on the blade root 3 mounted on the turbine blade 2 body 1 interlock and fix each other, making the installation more secure. The blade crown 4 is mounted on the top of the blade 2. The protective structure mounted on the blade 2 protects the turbine blade 2 body 1, making the turbine blade 2 body 1 more resistant to high temperature and deformation. As a result, the turbine blade 2, which has been optimized for low load, does not need to be equipped with additional structures, reducing the load on the turbine blade 2 and improving the service life of the turbine blade 2.

[0017] As a preferred embodiment, the protective structure further includes: an antioxidant coating 8, a reinforcing layer 9, a high-temperature resistant layer 10, and a wear-resistant layer 5; A high-temperature resistant layer 10 is applied to the blade 2, a reinforcing layer 9 is installed on the high-temperature resistant layer 10, an anti-oxidation coating 8 is applied to the reinforcing layer 9, and a wear-resistant layer 5 is applied to the anti-oxidation layer.

[0018] It should be noted that, firstly, blade 2 is ground and polished to remove rust and other substances from the surface. Then, the high-temperature resistant layer 10 and high-temperature resistant coating are evenly spread on the surface of blade 2. Next, the ceramic reinforcement layer 9 is covered on the high-temperature resistant coating to improve the strength of blade 2. Then, the anti-oxidation layer is applied to the reinforcement layer 9. Finally, the wear-resistant layer 5 is evenly sprayed on the entire exterior to reinforce and protect the whole structure, thereby improving the service life of blade 2.

[0019] As a preferred embodiment, the blade 2 has an arc-shaped cross-section.

[0020] As a preferred embodiment, the blade 2 is further provided with reinforcing ribs.

[0021] It should be noted that the strength of blade 2 has been further improved.

[0022] As a preferred embodiment, the reinforcement structure further includes: a fixing block 6 and a positioning groove 7; The fixing block 6 is installed on the blade root 3, and the fixing groove is opened on the blade root 3 and the fixing block 6 respectively.

[0023] It should be noted that when the turbine blade 2 body 1 is mounted around the rotor, the turbine blade 2 body 1 cannot effectively position and fix each other. By connecting the reinforcing block and positioning groove 7 on the blade root 3 installed on the turbine blade 2 body 1, the positioning of adjacent blade roots 3 can be achieved, while avoiding lateral movement of the blade 2 and improving accuracy.

[0024] As a preferred embodiment, the cross-section of the fixing block 6 is arc-shaped.

[0025] It should be noted that this design facilitates a close fit with the rotor, ensuring the strength of the connection.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-load optimized steam turbine blade (2), comprising a steam turbine blade (2) body (1), a blade (2), a blade root (3), a blade crown (4), a protective structure, and a reinforcing structure; Its features are, The blade (2) is mounted on the blade root (3), the blade crown (4) is mounted on the blade (2), the protective structure is mounted on the blade (2), and the reinforcing structure is mounted on the blade root (3).

2. The low-load optimized turbine blade (2) according to claim 1, characterized in that, The protective structure includes: an antioxidant coating (8), a reinforcing layer (9), a high-temperature resistant layer (10), and a wear-resistant layer (5); A high-temperature resistant layer (10) is applied to the blade (2), a reinforcing layer (9) is installed on the high-temperature resistant layer (10), an anti-oxidation coating (8) is applied to the reinforcing layer (9), and a wear-resistant layer (5) is applied to the anti-oxidation layer.

3. The low-load optimized turbine blade (2) according to claim 1, characterized in that, The cross-section of the blade (2) is arc-shaped.

4. The low-load optimized turbine blade (2) according to claim 1, characterized in that, The blade (2) is provided with reinforcing ribs.

5. A low-load optimized turbine blade (2) according to claim 1, characterized in that, The reinforcement structure includes: a fixing block (6) and a positioning groove (7); The fixing block (6) is installed on the blade root (3), and the fixing groove is opened on the blade root (3) and the fixing block (6) respectively.

6. A low-load optimized turbine blade (2) according to claim 5, characterized in that, The cross-section of the fixing block (6) is arc-shaped.

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