A low-pressure rotor blade

Abstract

This utility model discloses a low-pressure rotor blade, including a support base and a blade body. A recessed groove is annularly arranged at the edge of the support base, and wedge-shaped grooves are evenly arranged inside the recessed groove. A blade body is arranged on one side of each wedge-shaped groove. Gradient reinforcing ribs are arranged side-by-side on the inner wall of the blade body, and a gradient flow divider is arranged between adjacent gradient reinforcing ribs. Air holes are evenly arranged at the end of each gradient flow divider near the root of the blade body. The blade body of this utility model has gradient flow dividers, with the width gradually increasing from the root to the tip. Air holes are evenly arranged at the end of each gradient flow divider near the root of the blade body. A through-hole copper hollow tube is arranged inside the air holes. When the blade body rotates, the gradient flow dividers can effectively capture airflow and guide the airflow from the wider end to the narrower end, achieving forced convection of cooling air, effectively removing heat and preventing the blade from overheating.

Description

Technical Field

[0001] This utility model relates to the field of rotor blade technology, specifically a low-pressure rotor blade. Background Technology

[0002] In the field of power equipment such as aero-engines and gas turbines, low-pressure rotor blades, as core moving components, directly determine the overall operating efficiency, reliability, and service life of the machine. As equipment develops towards higher thrust-to-weight ratios, higher loads, and longer operating cycles, low-pressure rotor blades face increasingly stringent operating conditions. Existing technologies have gradually revealed shortcomings in structural design, heat dissipation efficiency, and strength performance, making it difficult to fully meet practical application requirements. Specific problems include: traditional blades are directly fixed to the support base, resulting in a complex and time-consuming installation process requiring extensive manual operation and precise adjustments. Furthermore, traditional blades have significant deficiencies in structural strength and heat dissipation performance, making them prone to overheating during high-speed rotation, leading to material fatigue and shortened lifespan. These shortcomings severely impact the working efficiency and reliability of low-pressure rotor blades. Utility Model Content

[0003] The purpose of this invention is to provide a low-pressure rotor blade to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a low-pressure rotor blade, comprising a support base and a blade body, wherein a recessed groove is provided in an annular manner at the edge of the support base, and wedge-shaped grooves are uniformly arranged inside the recessed grooves, and a blade body is provided on one side of each wedge-shaped groove, and a tenon matching the wedge-shaped groove is provided at one end of the blade body.

[0005] The blade body has an arc-shaped structure, and a sealed copper chamber is provided inside the blade body. Parallel microchannels are evenly arranged at one end of the sealed copper chamber near the top of the blade body through a partition strip. Gradient reinforcing ribs are arranged side by side on the inner sidewall of the blade body. Gradient diversion grooves are provided between two adjacent gradient reinforcing ribs. Air holes are evenly arranged at one end of each gradient diversion groove near the root of the blade body. A hollow copper tube with a through-hole is provided inside the air hole.

[0006] Preferably, the blade body at the top of the gradient flow divider is provided with an inner arc-shaped portion, and an air duct communicating with the gradient flow divider is provided on the blade body inside the inner arc-shaped portion.

[0007] Preferably, the thickness of the gradient reinforcing rib gradually decreases from the root to the tip of the blade body, and the width of the gradient diversion groove gradually increases from the root to the tip of the blade body.

[0008] Preferably, the sealed copper chamber is filled with 80%-90% of its volume of distilled water as a working medium.

[0009] Preferably, the sinking grooves between adjacent wedge-shaped grooves are provided with threaded holes, and the top of the sinking groove is provided with a sealing cover. The top of the sealing cover is uniformly provided with slots, and each slot is provided with a fixing bolt that corresponds one-to-one with the threaded hole.

[0010] Preferably, the inner wall of the copper hollow tube is coated with an Al2O3 insulating and wear-resistant coating with a thickness of 0.03-0.08mm, and the outer wall of the copper hollow tube is welded and sealed to the air hole.

[0011] Preferably, a titanium alloy reinforcing sheet with a thickness of 0.1-0.15 mm is attached to the outer surface of the inner arc-shaped part of the blade body. The titanium alloy reinforcing sheet is fixedly connected to the blade body by laser welding, and the edge of the titanium alloy reinforcing sheet is treated with a rounded transition.

[0012] Preferably, the separator is made of copper-nickel alloy, and the height of the separator is consistent with the height of the parallel microchannel.

[0013] Preferably, the inner wall of the sinking trough is covered with a nitrile rubber sealing gasket with a thickness of 0.5-1mm. The inner wall of the nitrile rubber sealing gasket is tightly fitted with the edge of the sealing cap, and the nitrile rubber sealing gasket is provided with clearance holes that correspond one-to-one with the threaded holes.

[0014] This invention provides a low-pressure rotor blade, which has significant advantages over existing technologies, specifically in the following aspects:

[0015] 1. This utility model provides a recessed groove in a ring at the edge of the support base, and wedge-shaped grooves are evenly arranged inside the recessed groove. Each wedge-shaped groove has a blade body on one side, and one end of the blade body is provided with a tenon that matches the wedge-shaped groove. This makes the installation process of the blade body simpler and faster, reduces installation time and labor intensity, and improves production efficiency.

[0016] 2. The inner wall of the blade body is provided with gradually increasing reinforcing ribs, and the thickness gradually decreases from the root to the tip of the blade body. The gradually increasing structure not only optimizes the material distribution, but also significantly enhances the overall structural strength of the blade, thereby improving the blade's fatigue resistance and service life.

[0017] 3. The blade body is equipped with a gradually increasing flow channel, with the width gradually increasing from the root to the tip. Air holes are evenly arranged at one end of each gradually increasing flow channel near the root of the blade body. A through-hole copper hollow tube is arranged inside the air hole. When the blade body rotates, the gradually increasing flow channel can effectively capture the airflow, guide the airflow from the wider end to the narrower end, and discharge it through the copper hollow tube, realizing forced convection of cooling air, effectively removing heat and preventing the blade from overheating.

[0018] 4. The blade body has a sealed copper chamber inside, which is filled with 80%-90% distilled water as the working fluid. When the blade tip temperature rises, the distilled water absorbs heat and evaporates into steam. The steam flows towards the blade root. Because there is a through copper hollow tube inside the pore, the cooling airflow passes through the inside. When the steam encounters the outer wall of the copper hollow tube, it condenses into liquid. The liquid flows back by gravity, forming a highly efficient thermal circulation system, which not only improves the heat dissipation efficiency of the blade, but also extends the service life of the blade. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the blade body distribution structure of this utility model;

[0020] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the support structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the inner side structure of the blade body of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the blade body of this utility model;

[0024] Figure 6 This is a schematic diagram of the internal side view of the blade body of this utility model;

[0025] In the diagram: 1. Support base; 2. Blade body; 3. Sinking groove; 4. Threaded hole; 5. Air intake groove; 6. Sealed copper chamber; 7. Copper hollow tube; 8. Tenon; 9. Inner arc section; 10. Parallel microchannel; 11. Groove; 12. Separator strip; 13. Gradient flow divider groove; 14. Gradient reinforcing rib; 15. Air hole; 16. Wedge groove; 17. Fixing bolt; 18. Encapsulation cover. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figure 1-6 The present invention provides an embodiment of a low-pressure rotor blade, comprising a support base 1 and a blade body 2. A recessed groove 3 is provided in an annular manner at the edge of the support base 1. Wedge-shaped grooves 16 are uniformly arranged inside the recessed groove 3, and a blade body 2 is provided on one side of each wedge-shaped groove 16. A tenon 8 matching the wedge-shaped groove 16 is provided at one end of the blade body 2.

[0028] The recessed grooves 3 between adjacent wedge grooves 16 are all provided with threaded holes 4, and the top of the recessed grooves 3 is provided with a sealing cover 18. The top of the sealing cover 18 is evenly provided with slots 11, and each slot 11 is provided with a fixing bolt 17 that corresponds one-to-one with the threaded hole 4.

[0029] The inner wall of the sink trough 3 is covered with a 0.5-1mm thick nitrile rubber sealing gasket. The inner wall of the nitrile rubber sealing gasket is tightly fitted with the edge of the encapsulation cover 18, and the nitrile rubber sealing gasket is provided with clearance holes that correspond one-to-one with the threaded holes 4.

[0030] The support base 1 is a ring structure with a recessed groove 3 at the edge. The depth and width of the recessed groove 3 are designed according to the actual application requirements to ensure sufficient structural strength and installation space. The inner wall of the recessed groove 3 is flat to facilitate the subsequent installation of nitrile rubber gaskets.

[0031] Inside the sinking groove 3, several wedge-shaped grooves 16 are evenly arranged. The wedge-shaped grooves 16 are wedge-shaped and their size matches the tenon 8 of the blade body 2 to ensure that the blade body 2 can be stably inserted into the wedge-shaped grooves 16. Each side of the wedge-shaped groove 16 is provided with the blade body 2, so that after the blade body 2 is inserted into the wedge-shaped groove 16, it can form a stable integral structure with the support base 1.

[0032] One end of the blade body 2 is provided with a tenon 8 that matches the wedge groove 16. The shape and size of the tenon 8 correspond to the wedge groove 16 to ensure a tight fit when inserted and prevent loosening. The blade body 2 is made of high-strength alloy to withstand the centrifugal force during high-speed rotation.

[0033] The recessed grooves 3 between adjacent wedge grooves 16 are all provided with threaded holes 4. The diameter and depth of the threaded holes 4 are designed according to the specifications of the fixing bolts 17 to ensure that the fixing bolts 17 can be firmly screwed into the threaded holes 4, thereby fixing the sealing cover 18.

[0034] The top of the sinking trough 3 is provided with a sealing cover 18. The size of the sealing cover 18 matches the opening of the sinking trough 3 and can completely cover the opening of the sinking trough 3. The top of the sealing cover 18 is evenly provided with slots 11. Each slot 11 is provided with a fixing bolt 17 that corresponds one-to-one with the threaded hole 4. The fixing bolt 17 is screwed into the threaded hole 4 through the slot 11 to firmly fix the sealing cover 18 on the sinking trough 3.

[0035] The inner wall of the sink trough 3 is covered with a 0.5-1mm thick nitrile rubber sealing gasket. The inner wall of the nitrile rubber sealing gasket is tightly fitted with the edge of the encapsulation cover 18 to ensure the sealing effect. The nitrile rubber sealing gasket is provided with clearance holes that correspond one-to-one with the threaded holes 4, so that the fixing bolt 17 can be smoothly screwed into the threaded holes 4 without affecting the sealing effect.

[0036] The blade body 2 has an arc-shaped structure, and the interior of the blade body 2 is provided with a sealed copper chamber 6, which is filled with 80%-90% of the volume of distilled water as a working medium.

[0037] Parallel microchannels 10 are evenly arranged at one end of the sealed copper chamber 6 near the top of the blade body 2 via a partition strip 12.

[0038] The separator 12 is made of copper-nickel alloy, and the height of the separator 12 is the same as the height of the parallel microchannel 10.

[0039] The blade body 2 has an arc-shaped structure. This arc design can not only improve the mechanical properties of the blade, but also optimize its hydrodynamic characteristics. The blade body 2 is preferably made of high-strength aluminum alloy to ensure its stability and durability under high temperature and high pressure environment.

[0040] Inside the blade body 2, there is a sealed copper chamber 6 made of pure copper, which has excellent thermal conductivity. The volume of the sealed copper chamber 6 occupies about 80%-90% of the internal space of the blade body 2 to ensure sufficient working fluid filling and heat exchange area.

[0041] Inside the sealed copper chamber 6, 80%-90% of the volume of distilled water is injected as the working fluid. Distilled water has a high specific heat capacity and good thermal conductivity, which can effectively absorb and transfer heat, thereby improving the heat dissipation efficiency of the blades.

[0042] The sealed copper chamber 6 is located near the top of the blade body 2. Parallel microchannels 10 are evenly arranged by the partition strips 12. These microchannels 10 have a width of 0.5-1.0 mm, a height of 2-3 mm, and a spacing of 1-2 mm to ensure uniform flow of the working fluid and efficient heat exchange within the microchannels.

[0043] The separator 12 is made of copper-nickel alloy, which not only has good thermal conductivity, but also high corrosion resistance and mechanical strength. The height of the separator 12 is consistent with the height of the parallel microchannel 10, ensuring the stability of the microchannel and the smooth flow of the working fluid.

[0044] During operation, when the blade body 2 is heated by an external heat source, the heat is transferred through the wall of the blade body 2 to the distilled water working fluid in the sealed copper chamber 6. After being heated, the working fluid decreases in density and flows upward, exchanging heat through the parallel microchannels 10. After cooling, the working fluid increases in density and flows downward back, forming a natural convection circulation, thereby achieving efficient heat dissipation of the blade.

[0045] The inner sidewall of the blade body 2 is provided with parallel gradient reinforcing ribs 14, and a gradient flow divider 13 is provided between two adjacent gradient reinforcing ribs 14. The blade body 2 at the top of the gradient flow divider 13 is provided with an inner arc-shaped part 9. A titanium alloy reinforcing sheet with a thickness of 0.1-0.15mm is attached to the outer surface of the inner arc-shaped part 9 of the blade body 2. The titanium alloy reinforcing sheet is fixedly connected to the blade body 2 by laser welding, and the edge of the titanium alloy reinforcing sheet is treated with a rounded transition.

[0046] The inner wall of the blade body 2 of this utility model is provided with parallel gradient reinforcing ribs 14. The design of the gradient reinforcing ribs 14 is to improve the structural strength and durability of the blade body 2. Specifically, the cross-sectional shape of the gradient reinforcing ribs 14 is trapezoidal, and its height gradually decreases from the root to the top of the blade body 2, forming a gradient structure. This not only effectively disperses the stress on the blade during operation, but also reduces the overall weight of the blade.

[0047] A gradient flow divider 13 is provided between each of the two adjacent gradient reinforcing ribs 14. The main function of the gradient flow divider 13 is to optimize the fluid dynamics characteristics inside the blade body 2 and reduce the turbulence and resistance of the fluid inside the blade. The depth and width of the gradient flow divider 13 also gradually decrease from the root to the tip of the blade body 2, which corresponds to the gradient design of the gradient reinforcing ribs 14 and ensures that the fluid flows more smoothly inside the blade.

[0048] An inner arc-shaped section 9 is provided on the blade body 2 at the top of the gradient flow divider 13. The inner arc-shaped section 9 is designed to further improve the guiding performance of the fluid and increase the efficiency of the blade. The curvature of the inner arc-shaped section 9 is precisely calculated to ensure that the fluid can obtain the best guiding effect when passing through this part.

[0049] The outer surface of the inner arc-shaped part 9 is fitted with a titanium alloy reinforcing sheet with a thickness of 0.1-0.15mm. The titanium alloy reinforcing sheet is selected based on its excellent mechanical properties and corrosion resistance, which can significantly improve the strength and durability of the blade body 2 without significantly increasing the weight of the blade. The titanium alloy reinforcing sheet is fixedly connected to the blade body 2 by laser welding technology to ensure the strength and stability of the connection. The application of laser welding technology not only improves the welding quality, but also reduces the thermal impact on the blade body 2 during the welding process.

[0050] In addition, the edges of the titanium alloy reinforcing plates are rounded, which not only effectively avoids stress concentration and extends the service life of the blades, but also reduces the frictional resistance of the fluid on the blade surface, further improving the operating efficiency of the blades.

[0051] An air duct 5, which is connected to the gradient flow divider 13, is provided on the blade body 2 on the inner side of the inner arc-shaped section 9.

[0052] The thickness of the gradually increasing reinforcing rib 14 gradually decreases from the root to the tip of the blade body 2, and the width of the gradually increasing flow channel 13 gradually increases from the root to the tip of the blade body 2.

[0053] Each gradient flow channel 13 has a uniformly arranged air hole 15 at one end near the root of the blade body 2, and a through copper hollow tube 7 is arranged inside the air hole 15.

[0054] The inner wall of the copper hollow tube 7 is coated with an Al2O3 insulating and wear-resistant coating with a thickness of 0.03-0.08mm, and the outer wall of the copper hollow tube 7 is welded and sealed to the air hole 15.

[0055] Inside the inner arc-shaped section 9, there is an air duct 5 that communicates with the gradient flow divider 13. The main function of the air duct 5 is to guide the airflow into the interior of the blade body 2, thereby optimizing the airflow distribution and flow characteristics.

[0056] The width of the gradient flow divider 13 gradually increases from the root to the tip of the blade body 2. Specifically, the width is narrower at the root and wider at the tip. This design helps to achieve different airflow diversion effects at different parts of the blade body 2, thereby improving the overall airflow utilization efficiency.

[0057] The thickness of the gradually increasing stiffener 14 gradually decreases from the root to the tip of the blade body 2. The thickness at the root is greater to enhance the support strength and rigidity of the blade, while the thickness at the tip is smaller to reduce the overall weight of the blade and improve its dynamic response performance. This gradually increasing thickness design not only optimizes the mechanical properties of the blade, but also reduces material consumption.

[0058] Each gradient flow channel 13 has a uniformly arranged air hole 15 at one end near the root of the blade body 2. A through copper hollow tube 7 is arranged inside the air hole 15. The main function of the copper hollow tube 7 is to guide the airflow and to a certain extent play a role in heat dissipation.

[0059] The inner wall of the copper hollow tube 7 is coated with an Al2O3 insulating and wear-resistant coating with a thickness of 0.03-0.08mm. This coating not only has good insulation properties, but also excellent wear resistance, which can effectively extend the service life of the copper hollow tube.

[0060] The outer wall of the copper hollow tube 7 is welded and sealed to the air hole 15 to ensure that the airflow does not leak when passing through the air hole 15 and the copper hollow tube 7, thereby improving the utilization efficiency of the airflow.

[0061] In this embodiment of the application, the nitrile rubber sealing gasket is pasted on the inner wall of the annular recessed groove 3 at the edge of the support base 1, ensuring that the inner wall of the sealing gasket is flat and fits the inner wall of the recessed groove 3, and that the clearance hole is precisely aligned with the threaded hole 4 between the adjacent wedge groove 16 in the recessed groove 3.

[0062] Align the tenon 8 at one end of the blade body 2 with the wedge-shaped grooves 16 evenly arranged inside the recessed groove 3, and insert it smoothly along the direction of the wedge-shaped grooves 16 so that the tenon 8 and the wedge-shaped grooves 16 fit tightly together until the blade body 2 and the support base 1 form a stable whole. Complete the installation of all blade bodies 2 in sequence according to the above steps.

[0063] Cover the top of the sink 3 with the encapsulation cover 18, ensuring that the edge of the encapsulation cover 18 is tightly fitted to the inner wall of the nitrile rubber sealing gasket, and that the top slot 11 of the encapsulation cover 18 corresponds one-to-one with the threaded hole 4 inside the sink 3; insert the fixing bolts 17 one by one into the slot 11, and screw them clockwise into the corresponding threaded hole 4 until the bolt head is fitted with the bottom surface of the slot 11 of the encapsulation cover 18, thus completing the assembly and fixing of the support base 1 and the blade body 2.

[0064] It was confirmed that the sealed copper chamber 6 inside the blade body 2 was filled with 80%-90% of the volume of distilled water working medium, the chamber 6 was leak-free, and the partition strip 12 evenly divided the chamber 6 near the top of the blade body 2 into parallel microchannels 10, and the microchannels 10 were not blocked.

[0065] Inspect the parallel gradient reinforcing ribs 14 on the inner wall of the blade body 2, and confirm that their thickness gradually decreases from the root to the tip, with no deformation or cracks; inspect the gradient flow divider grooves 13 between adjacent gradient reinforcing ribs 14, and confirm that their width gradually increases from the root to the tip, with no foreign objects in the grooves; check the 0.1-0.15mm thick titanium alloy reinforcing sheet attached to the outer surface of the inner arc-shaped part 9, and confirm that the laser welding connection is firm, the edge rounded transition is smooth, and there are no welding defects.

[0066] Confirm that the air intake groove 5 on the inner side of the inner arc-shaped section 9 is smoothly connected to the gradient diversion groove 13; check the air hole 15 at the end of each gradient diversion groove 13 near the root of the blade body 2, and the copper hollow tube 7 penetrating inside the air hole 15, confirm that the outer wall of the copper hollow tube 7 is well welded and sealed to the air hole 15, that the 0.03-0.08mm thick Al2O3 insulating and wear-resistant coating sprayed on the inner wall is not peeling off or damaged, and that there is no blockage inside the hollow tube.

[0067] When the power equipment is started, the support seat 1 drives the blade body 2 to rotate at high speed. The arc-shaped structure of the blade body 2 and the inner arc-shaped part 9 cooperate to guide the airflow. The airflow enters the gradual flow divider 13 through the air intake groove 5. Because the width of the gradual flow divider 13 gradually increases from the root to the top, the airflow flows smoothly from the narrower root to the wider top along the channel, reducing turbulence and resistance.

[0068] During operation, the blade body 2 is heated by an external heat source. The heat is transferred through the wall to the distilled water working fluid in the internal sealed copper chamber 6. The working fluid evaporates into steam when heated, and after the density decreases, it flows upward along the parallel microchannel 10. At the same time, part of the cooling airflow, under the action of centrifugal force of the blade rotation, flows through the gradient diversion groove 13 to the root air hole 15, and passes through the copper hollow tube 7 to form forced convection. After the steam comes into contact with the outer wall of the copper hollow tube 7, it is cooled and condensed into liquid. The liquid flows back to the bottom of the chamber 6 under the action of gravity, forming a natural convection circulation, which continuously removes heat from the blade.

[0069] The gradient reinforcing rib 14, with its large root thickness and small tip thickness, effectively disperses the centrifugal force and airflow impact stress generated by high-speed rotation, reducing the overall weight of the blade; the titanium alloy reinforcing sheet enhances the strength and corrosion resistance of the inner arc-shaped part 9, and the rounded edge transition reduces airflow friction resistance; the Al2O3 coating on the inner wall of the copper hollow tube 7 prevents high-speed airflow erosion and wear, ensures long-term unobstructed airflow channels, and guarantees stable blade operation.

[0070] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-pressure rotor blade, comprising a support base (1) and a blade body (2), characterized in that: The support base (1) has a recessed groove (3) arranged in a ring at the edge position. The recessed groove (3) has wedge-shaped grooves (16) evenly arranged inside. Each wedge-shaped groove (16) has a blade body (2) on one side. One end of the blade body (2) has a tenon (8) that matches the wedge-shaped groove (16). The blade body (2) has an arc-shaped structure, and a sealed copper chamber (6) is provided inside the blade body (2). Parallel microchannels (10) are uniformly provided at one end of the sealed copper chamber (6) near the top of the blade body (2) through a partition strip (12). Gradient reinforcing ribs (14) are arranged side by side on the inner sidewall of the blade body (2). Gradient diversion grooves (13) are provided between two adjacent gradient reinforcing ribs (14). Wind holes (15) are uniformly provided at one end of each gradient diversion groove (13) near the root of the blade body (2). A through-hole copper hollow tube (7) is provided inside the wind hole (15).

2. A low-pressure rotor blade according to claim 1, characterized in that: The blade body (2) at the top of the gradient flow divider (13) is provided with an inner arc-shaped part (9), and the blade body (2) inside the inner arc-shaped part (9) is provided with an air duct (5) that communicates with the gradient flow divider (13).

3. A low-pressure rotor blade according to claim 1, characterized in that: The thickness of the gradually increasing reinforcing rib (14) gradually decreases from the root to the tip of the blade body (2), and the width of the gradually increasing flow channel (13) gradually increases from the root to the tip of the blade body (2).

4. A low-pressure rotor blade according to claim 1, characterized in that: The sealed copper chamber (6) is filled with 80%-90% of its volume of distilled water as a working medium.

5. A low-pressure rotor blade according to claim 1, characterized in that: The sinking groove (3) between adjacent wedge grooves (16) is provided with threaded holes (4), and the top of the sinking groove (3) is provided with a sealing cover (18). The top of the sealing cover (18) is uniformly provided with slots (11), and each slot (11) is provided with a fixing bolt (17) corresponding to the threaded hole (4).

6. A low-pressure rotor blade according to claim 1, characterized in that: The inner wall of the copper hollow tube (7) is coated with an Al2O3 insulating and wear-resistant coating with a thickness of 0.03-0.08mm, and the outer wall of the copper hollow tube (7) is welded and sealed to the air hole (15).

7. A low-pressure rotor blade according to claim 1, characterized in that: The outer surface of the inner arc-shaped part (9) of the blade body (2) is fitted with a titanium alloy reinforcing sheet with a thickness of 0.1-0.15mm. The titanium alloy reinforcing sheet is fixedly connected to the blade body (2) by laser welding, and the edge of the titanium alloy reinforcing sheet is treated with a rounded transition.

8. A low-pressure rotor blade according to claim 1, characterized in that: The separator (12) is made of copper-nickel alloy and the height of the separator (12) is the same as the height of the parallel microchannel (10).

9. A low-pressure rotor blade according to claim 1, characterized in that: The inner wall of the sinking groove (3) is covered with a nitrile rubber sealing gasket with a thickness of 0.5-1mm. The inner wall of the nitrile rubber sealing gasket is tightly fitted with the edge of the encapsulation cover (18), and the nitrile rubber sealing gasket is provided with clearance holes that correspond one-to-one with the threaded holes (4).

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