Low-pressure rotor blade fatigue-resistant reinforcement structure

Abstract

The utility model discloses a low -voltage rotor blade anti -fatigue strengthening structure, including blade and rotor, the blade is respectively equidistant and set in the edge of the outside of rotor, the one end of blade is fixed with the insert block, the inside equidistant of rotor edge is provided with the slot, and the slot is connected with the insert block, the one end of insert block is provided with through -hole no.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure rotor blade technology, specifically to a fatigue-resistant strengthening structure for low-pressure rotor blades. Background Technology

[0002] A thermal power plant, or coal-fired power plant for short, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. Its basic production process is as follows: fuel burns to heat water and generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives a steam turbine to rotate, converting the heat energy into mechanical energy. The turbine then drives a generator to rotate, converting the mechanical energy into electrical energy. The low-pressure rotor blades of a thermal power plant are a key component of the steam turbine's low-pressure rotor, primarily used to convert heat energy into mechanical energy. Their performance directly affects the turbine's operating efficiency and safety.

[0003] The existing low-pressure rotor blade structure has some drawbacks: First, it has poor fatigue resistance and is prone to fatigue damage, which in turn affects the service life of the blades and the overall performance of the rotor; second, it is not easy to maintain and replace, and once damage occurs after long-term operation, the repair process is complicated and costly. Utility Model Content

[0004] The purpose of this invention is to provide a fatigue-resistant strengthening structure for low-pressure rotor blades, in order to solve the problems of poor fatigue resistance and difficulty in maintenance and replacement mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fatigue-resistant strengthening structure for low-pressure rotor blades, comprising blades and a rotor. The blades are equidistantly arranged on the outer edge of the rotor. One end of each blade is fixed with a plug. Slots are equidistantly arranged inside the rotor edge, and the slots engage with the plugs. One end of each plug has a through hole one, and the other end has a through hole two. A positioning ring is provided at the front end of the rotor, and connecting plates are equidistantly arranged on the rear edge of the positioning ring. The rotor, through the slots, limits the plugs, ensuring that the blades are stably fixed to the rotor and will not loosen or fall off during operation. The positioning ring fits against the front end of the rotor, allowing the first and second locking posts to be inserted into the through holes one and two, respectively, further limiting the plugs. This double-locking design makes the connection between the blades and the rotor more robust and reliable, effectively improving the overall fatigue-resistant strengthening structure of the low-pressure rotor blades.

[0006] As a further technical solution of this utility model, a locking post is fixed at one end of the rear part of the connecting plate, and the locking post is engaged with the through hole.

[0007] As a further technical solution of this utility model, the other end of the rear part of the connecting plate is fixed with a second locking post, and the second locking post is engaged with the second through hole. When the first bonding block and the second bonding block are at the same height, the threaded post can be inserted into the corresponding through hole in the first bonding block, so that the second reinforcing rod and the first reinforcing rod cooperate with each other to support the blade and improve the blade's stability.

[0008] As a further technical solution of this utility model, a knob is provided at the front end of the positioning ring, and a bolt is fixed at the rear end of the knob.

[0009] As a further technical solution of this utility model, the front end of the rotor is provided with threaded holes at equal intervals, and the threaded holes are threaded with the bolts. Rotating the knob drives the bolts to rotate, so that the bolts are screwed into the threaded holes, thereby installing the positioning ring and preventing the connecting plate from shifting.

[0010] As a further technical solution of this utility model, a reinforcing rod is fixed to one end of the rotor, and a bonding block is fixed to one end of the reinforcing rod.

[0011] As a further technical solution of this utility model, a second reinforcing rod is fixed to the other end of the rotor, and a second fitting block is fixed to one end of the second reinforcing rod.

[0012] As a further technical solution of this utility model, threaded posts are fixed at both ends of one side of the second bonding block, and the threaded posts are threadedly engaged with nuts. By screwing the nuts onto the threaded posts, the threaded posts can be fixed, and the second reinforcing rod and the first reinforcing rod can be assembled.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The rotor is limited by the slot, so that the blade can be stably fixed on the rotor and will not loosen or fall off during operation. The positioning ring is attached to the front end of the rotor, so that the first and second locking pins are inserted into the first and second through holes respectively, further limiting the insertion of the blade. This double locking design makes the connection between the blade and the rotor more secure and reliable, effectively improving the fatigue resistance and strengthening structure of the entire low-pressure rotor blade. Subsequently, when the first and second bonding blocks are at the same height, the threaded pin can be inserted into the corresponding through hole in the first bonding block, so that the second reinforcing rod and the first reinforcing rod cooperate with each other to support the blade, improve the blade's firmness, and have good fatigue resistance and strengthening properties. (2) Rotate the knob to drive the bolt to rotate, so that the bolt is screwed into the threaded hole, install the position of the positioning ring, and prevent the connecting plate from shifting. Screw the nut on the threaded post to fix the threaded post, and assemble the reinforcing rod 2 with the reinforcing rod 1 for easy maintenance and replacement. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the front cross-sectional structure of this utility model; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the blade and insert structure of this utility model; Figure 5 This is a schematic diagram of the rear end structure of the positioning ring and connecting plate of this utility model; In the diagram: 1. Through hole one; 2. Insert block; 3. Through hole two; 4. Reinforcing rod one; 5. Blade; 6. Reinforcing rod two; 7. Slot; 8. Rotor; 9. Threaded hole; 10. Knob; 11. Positioning ring; 12. Connecting plate; 13. Clamping post one; 14. Bolt; 15. Clamping post two; 16. Nut; 17. Adhesive block one; 18. Threaded post; 19. Adhesive block two. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-5 The present invention provides an embodiment of a fatigue-resistant strengthening structure for low-pressure rotor blades, comprising blades 5 and a rotor 8. Blades 5 are equidistantly arranged on the outer edge of the rotor 8. One end of each blade 5 is fixed with a plug 2. Slots 7 are equidistantly arranged inside the edge of the rotor 8, and the slots 7 are engaged with the plug 2. One end of the plug 2 is provided with a through hole 1, and the other end of the plug 2 is provided with a through hole 3. A positioning ring 11 is provided at the front end of the rotor 8, and a connecting plate 12 is equidistantly arranged on the rear edge of the positioning ring 11. One end of the rear part of the connecting plate 12 is fixed with a locking post 13, and the locking post 13 is engaged with the through hole 11. The other end of the rear part of the connecting plate 12 is fixed with a locking post 15, and the locking post 15 is engaged with the through hole 23. Specifically, such as Figure 1 and Figure 5 As shown, the rotor 8 uses the slot 7 to limit the insertion block 2, so that the blade 5 can be stably fixed on the rotor 8 and will not loosen or fall off during operation. The positioning ring 11 fits against the front end of the rotor 8, so that the first locking post 13 and the second locking post 15 are inserted into the first through hole 1 and the second through hole 3 respectively, further limiting the insertion block 2. This double locking design makes the connection between the blade 5 and the rotor 8 more firm and reliable, effectively improving the fatigue resistance and strengthening structure of the entire low-pressure rotor blade.

[0017] A knob 10 is provided at the front end of the positioning ring 11, and a bolt 14 is fixed at the rear end of the knob 10. Threaded holes 9 are provided at equal intervals at the front end of the rotor 8, and the threaded holes 9 are threadedly engaged with the bolt 14. Specifically, such as Figure 2 and Figure 5 As shown, rotating the knob 10 causes the bolt 1 to rotate, so that the bolt 14 is screwed into the threaded hole 9, which installs the positioning ring 11 and prevents the connecting plate 12 from shifting.

[0018] One end of the rotor 8 is fixed with a reinforcing rod 14, and one end of the reinforcing rod 14 is fixed with a bonding block 17. The other end of the rotor 8 is fixed with a reinforcing rod 26, and one end of the reinforcing rod 26 is fixed with a bonding block 29. Specifically, such as Figure 3 and Figure 4 As shown, when the positions of the first bonding block 17 and the second bonding block 19 are at the same height, the threaded post 18 can be inserted into the corresponding through hole in the first bonding block 17, so that the second reinforcing rod 6 and the first reinforcing rod 4 cooperate with each other to support the blade 5 and improve the blade's stability.

[0019] Both ends of one side of the bonding block 19 are fixed with threaded posts 18, and the threaded posts 18 are threadedly engaged with the nut 16. Specifically, such as Figure 3 and Figure 5 As shown, screwing nut 16 onto threaded post 18 can fix threaded post 18 and assemble reinforcing rod 2 6 and reinforcing rod 1 4.

[0020] In this embodiment, during use, the rotor 8 uses the slot 7 to limit the insertion block 2, ensuring that the blade 5 is stably fixed to the rotor 8 and will not loosen or fall off during operation. The positioning ring 11 fits against the front end of the rotor 8, allowing the first locking post 13 and the second locking post 15 to be inserted into the first through hole 1 and the second through hole 3 respectively, further limiting the insertion block 2. This double-locking design makes the connection between the blade 5 and the rotor 8 more secure and reliable, effectively improving the fatigue resistance and strengthening structure of the entire low-pressure rotor blade. Subsequently, when the first bonding block 17 and the second bonding block 15 are engaged... When positions 19 are at the same height, the threaded post 18 can be inserted into the corresponding through hole in the mating block 17, so that the reinforcing rod 2 6 and the reinforcing rod 1 4 cooperate with each other to support the blade 5 and improve the blade's stability. Then, rotate the knob 10 to drive the bolt 1 to rotate, so that the bolt 14 is screwed into the threaded hole 9 to install the positioning ring 11 and prevent the connecting plate 12 from shifting. Screw the nut 16 onto the threaded post 18 to fix the threaded post 18 and assemble the reinforcing rod 2 6 and the reinforcing rod 1 4. In summary, this structure has good fatigue resistance and is easy to maintain and replace.

Claims

1. A fatigue-resistant strengthening structure for low-pressure rotor blades, comprising blades (5) and a rotor (8), characterized in that: The blades (5) are equidistantly arranged on the outer edge of the rotor (8). One end of the blade (5) is fixed with a plug (2). The inner edge of the rotor (8) is equidistantly provided with slots (7), and the slots (7) are engaged with the plug (2). One end of the plug (2) is provided with a through hole (1), and the other end of the plug (2) is provided with a through hole (3). The front end of the rotor (8) is provided with a positioning ring (11), and the rear edge of the positioning ring (11) is equidistantly provided with connecting plates (12).

2. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 1, characterized in that: One end of the rear part of the connecting plate (12) is fixed with a locking post (13), and the locking post (13) is engaged with the through hole (1).

3. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 2, characterized in that: The other end of the rear part of the connecting plate (12) is fixed with a second locking post (15), and the second locking post (15) is engaged with the second through hole (3).

4. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 1, characterized in that: The positioning ring (11) has a knob (10) at its front end, and the knob (10) is fixed with a bolt (14) at its rear end.

5. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 1, characterized in that: The rotor (8) has threaded holes (9) at equal intervals at its front end, and the threaded holes (9) are threadedly engaged with the bolts (14).

6. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 5, characterized in that: One end of the rotor (8) is fixed with a reinforcing rod (4), and one end of the reinforcing rod (4) is fixed with a bonding block (17).

7. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 6, characterized in that: The other end of the rotor (8) is fixed with a reinforcing rod two (6), and one end of the reinforcing rod two (6) is fixed with a bonding block two (19).

8. The fatigue-resistant strengthening structure for low-pressure rotor blades according to claim 7, characterized in that: Both ends of one side of the second bonding block (19) are fixed with threaded posts (18), and the threaded posts (18) are threadedly engaged with the nut (16).

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