Mixed-flow water turbine fixed guide vane with sawtooth-shaped water outlet edge wing section

Abstract

The utility model discloses a mixed-flow water turbine fixed guide vane with a sawtooth-shaped water outlet edge wing section, which comprises a fixed ring, and the upper side of the fixed ring is fixedly connected with a seat ring upper ring plate. By arranging the mounting grooves, the sawtooth side wing guide vanes can be conveniently connected and separated from the seat ring upper ring plate and the seat ring lower ring plate, the replacement convenience of the device is improved, the phenomenon that the whole device needs to be replaced when the device is replaced is avoided, the sawtooth side wing guide vanes can be fixed through the cover plate by arranging the cover plate, and the service life of the device is prolonged. By arranging a gear ring, a plurality of reinforcing screw rods can be screwed into the inner sides of the reinforcing grooves at the same time, the stability of connection between the seat ring upper ring plate and the cover plate and between the seat ring lower ring plate and the cover plate is improved, and the stability of operation of the device is further improved; the problem that an existing fixed guide vane of a zigzag water outlet edge wing type mixed-flow water turbine is inconvenient to maintain and replace is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbines, in particular to a fixed guide vane of a Francis water turbine with a sawtooth-shaped water outlet edge airfoil. Background Art

[0002] The fixed guide vanes of a Francis turbine have two functions: 1. As a flow-through component, it allows the water from the turbine volute to flow evenly into the movable guide vanes; 2. As a load-bearing component, it bears the axial load of the entire turbine generator set and transmits the axial load to the concrete foundation.

[0003] The existing fixed guide vanes of the Francis turbine with a sawtooth outlet airfoil are mostly fixed to the seat ring, which is not convenient for replacement and maintenance. When a single fixed guide vane is damaged, the entire component needs to be replaced, resulting in increased maintenance costs for the device. Therefore, it is necessary to design and modify the fixed guide vanes of the Francis turbine with a sawtooth outlet airfoil to solve the problem of inconvenient maintenance and replacement. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the purpose of the utility model is to provide a Francis turbine fixed guide vane with a sawtooth outlet edge airfoil.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed guide vane of a mixed flow turbine with a sawtooth-shaped water outlet airfoil, comprising a fixed ring, an upper ring plate of a seat ring is fixedly connected to the upper side of the fixed ring, a lower ring plate of a seat ring is fixedly connected to the lower side of the fixed ring, mounting grooves are provided on the surfaces of the upper ring plate of the seat ring and the lower ring plate of the seat ring, a sawtooth-edge wing guide vane is movably connected to the inner side of the mounting groove, a threaded plate is fixedly connected to the upper and lower sides of the fixed ring, a cover plate is movably connected to the outer side of the threaded plate, a threaded groove is provided on the surface of the cover plate, and the threaded groove and the threaded plate are connected to the fixed guide vane. Threaded connection, the cover plate is provided with a receiving groove on the inner side, a reinforcing screw is movably connected to the inner side of the receiving groove, reinforcement grooves are provided on the inner sides of the seat ring upper ring plate and the seat ring lower ring plate, the reinforcement grooves and the reinforcement screws are used in combination, a flat gear is fixedly connected to the side of the reinforcement screws away from each other, a gear ring is meshed on the side of the flat gears close to each other, the gear ring and the cover plate are movably connected, a magnetic plate is fixedly connected to the side of the seat ring upper ring plate and the seat ring lower ring plate away from each other, an insertion groove is provided on the inner side of the cover plate, a twist block is fixedly connected to the side of the flat gears away from each other.

[0006] As a preferred embodiment of the utility model, a twisting groove is opened on the inner side of the cover plate, and the twisting groove and the twisting block are movably connected.

[0007] As a preferred embodiment of the utility model, a groove is provided on the inner side of the fixing ring, and the groove is movably connected to the serrated wing guide vane.

[0008] As a preferred embodiment of the present invention, a first reinforcement pad is fixedly connected to one side of the cover plates that are close to each other.

[0009] As a preferred embodiment of the present invention, second reinforcement pads are fixedly connected to both upper and lower sides of the fixing ring.

[0010] As a preferred embodiment of the present invention, a sealing ring is fixedly connected to one side of the seat ring upper ring plate and the seat ring lower ring plate that are close to each other, and the sealing ring is movably connected to the serrated edge wing guide vane.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model provides an installation groove, so that the serrated wing guide vane is easy to connect and separate with the seat ring upper ring plate and the seat ring lower ring plate, thereby improving the convenience of device replacement and avoiding the need to replace the entire device when replacing the device. By providing a cover plate, the serrated wing guide vane can be fixed by the cover plate to avoid shaking during rotation, thereby improving the stability of the device. By providing a gear ring, multiple reinforcement screws can be screwed into the inner side of the reinforcement groove at the same time, thereby improving the stability of the connection between the seat ring upper ring plate and the seat ring lower ring plate and the cover plate, further improving the stability of the device operation, and solving the problem of inconvenient maintenance and replacement of the fixed guide vanes of the existing serrated outlet airfoil mixed flow turbine.

[0013] 2. The utility model provides a screwing groove, which makes it easy for the user to screw the screw block, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the structure of the utility model;

[0015] Figure 2 This is a top view of the structure of the utility model;

[0016] Figure 3 It is a bottom view of the utility model.

[0017] In the figure: 1. fixing ring; 2. upper ring plate of seat ring; 3. lower ring plate of seat ring; 4. mounting groove; 5. serrated wing guide vane; 6. threaded plate; 7. cover plate; 8. threaded groove; 9. receiving groove; 10. reinforcement screw; 11. reinforcement groove; 12. gear ring; 13. magnetic plate; 14. insertion groove; 15. screw block; 16. screwing groove; 17. groove; 18. first reinforcement pad; 19. second reinforcement pad; 20. sealing ring; 21. flat gear. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figures 1 to 3 As shown, the utility model provides a fixed guide vane of a mixed flow turbine with a sawtooth-shaped water outlet airfoil, a fixed ring 1, an upper ring plate 2 of a seat ring fixedly connected to the upper side of the fixed ring 1, a lower ring plate 3 of a seat ring fixedly connected to the lower side of the fixed ring 1, mounting grooves 4 are provided on the surfaces of the upper ring plate 2 of the seat ring and the lower ring plate 3 of the seat ring, a sawtooth-edge wing guide vane 5 is movably connected to the inner side of the mounting groove 4, a threaded plate 6 is fixedly connected to the upper and lower sides of the fixed ring 1, a cover plate 7 is movably connected to the outer side of the threaded plate 6, the cover plate 7 is a bearing structure, so that the inner and outer sides thereof can be rotated separately, a threaded groove 8 is provided on the surface of the cover plate 7, and the threaded groove 8 and the threaded plate 6 are screwed The cover plate 7 is connected by a groove, and a receiving groove 9 is provided on the inner side of the cover plate 7. A reinforcing screw 10 is movably connected to the inner side of the receiving groove 9. Reinforcing grooves 11 are provided on the inner sides of the seat ring upper ring plate 2 and the seat ring lower ring plate 3. The reinforcing grooves 11 and the reinforcing screw 10 are used together. A flat gear 21 is fixedly connected to the side of the reinforcing screw 10 away from each other, and a gear ring 12 is meshed on the side of the flat gear 21 close to each other. The gear ring 12 and the cover plate 7 are movably connected, and a magnetic plate 13 is fixedly connected to the side of the seat ring upper ring plate 2 and the seat ring lower ring plate 3 away from each other. An insertion groove 14 is provided on the inner side of the cover plate 7, and a twist block 15 is fixedly connected to the side of the flat gear 21 away from each other.

[0020] refer to Figure 3 A twisting groove 16 is provided on the inner side of the cover plate 7, and the twisting groove 16 and the twisting block 15 are movably connected.

[0021] As a technical optimization solution of the present invention, the provision of the screwing groove 16 makes it easier for the user to screw the screw block 15, thereby improving the convenience of using the device.

[0022] refer to Figure 1 A groove 17 is provided on the inner side of the fixing ring 1 , and the groove 17 is movably connected to the sawtooth wing guide vane 5 .

[0023] As a technical optimization solution of the present invention, by providing the groove 17, the serrated edge wing guide vane 5 can be further fixed by the fixing ring 1, thereby improving the stability of the device.

[0024] refer to Figure 1 A first reinforcement pad 18 is fixedly connected to one side of the cover plates 7 that are close to each other.

[0025] As a technical optimization solution of the present invention, by providing the first reinforcement pad 18, the cover plate 7 can increase the friction between the seat ring upper ring plate 2 and the seat ring lower ring plate 3, further improving the stability of the device.

[0026] refer to Figure 2 The second reinforcement pads 19 are fixedly connected to the upper and lower sides of the fixing ring 1.

[0027] As a technical optimization solution of the utility model, by providing the second reinforcement pad 19, the friction between the seat ring upper ring plate 2 and the seat ring lower ring plate 3 and the cover plate 7 can be further increased, thereby further improving the stability of the device.

[0028] refer to Figure 1 A sealing ring 20 is fixedly connected to the side where the seat ring upper ring plate 2 and the seat ring lower ring plate 3 are close to each other, and the sealing ring 20 is movably connected to the serrated edge wing guide vane 5.

[0029] As a technical optimization solution of the present invention, the sealing ring 20 is provided to make the device run more stably and improve the sealing performance of the device.

[0030] The working principle and use process of the utility model: during maintenance, the screw block 15 is rotated, the screw block 15 drives the flat gear 21 to rotate, the flat gear 21 drives the gear ring 12 to rotate, the gear ring 12 drives other flat gears 21 to rotate, the flat gear 21 drives the reinforcement screw 10 to separate from the reinforcement groove 11, and the cover plate 7 is rotated at the same time to separate the cover plate 7 from the threaded plate 6, and then the damaged sawtooth wing guide vane 5 is pulled out of the installation groove 4 and replaced with a new one. Then the cover plate 7 is screwed back on the outside of the threaded plate 6, and the reinforcement screw 10 is screwed back into the inside of the reinforcement groove 11.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Francis turbine fixed guide vane with a sawtooth outlet airfoil, comprising a fixed ring (1), characterized in that: The upper side of the fixing ring (1) is fixedly connected to a seat ring upper ring plate (2), and the lower side of the fixing ring (1) is fixedly connected to a seat ring lower ring plate (3). The surfaces of the seat ring upper ring plate (2) and the seat ring lower ring plate (3) are both provided with mounting grooves (4), and the inner side of the mounting grooves (4) is movably connected to a sawtooth wing guide vane (5). The upper and lower sides of the fixing ring (1) are both fixedly connected to a threaded plate (6), and the outer side of the threaded plate (6) is movably connected to a cover plate (7), and the surface of the cover plate (7) is provided with a threaded groove (8), and the threaded groove (8) is threadedly connected to the threaded plate (6). The inner side of the cover plate (7) is provided with a receiving groove (9), and the inner side of the receiving groove (9) is movably connected to a reinforcing A fixing screw (10), the inner sides of the seat ring upper ring plate (2) and the seat ring lower ring plate (3) are both provided with a reinforcement groove (11), the reinforcement groove (11) and the reinforcement screw (10) are used in combination, the side of the reinforcement screw (10) away from each other is fixedly connected to a flat gear (21), the side of the flat gear (21) close to each other is meshed with a gear ring (12), the gear ring (12) and the cover plate (7) are movably connected, the side of the seat ring upper ring plate (2) and the seat ring lower ring plate (3) away from each other is fixedly connected to a magnetic plate (13), the inner side of the cover plate (7) is provided with an insertion groove (14), and the side of the flat gear (21) away from each other is fixedly connected to a twist block (15).

2. A Francis turbine fixed guide vane with a sawtooth outlet airfoil according to claim 1, characterized in that: A twisting groove (16) is provided on the inner side of the cover plate (7), and the twisting groove (16) and the twisting block (15) are movably connected.

3. A Francis turbine fixed guide vane with a sawtooth outlet airfoil according to claim 1, characterized in that: A groove (17) is provided on the inner side of the fixing ring (1), and the groove (17) is movably connected to the sawtooth wing guide vane (5).

4. A Francis turbine fixed guide vane with a sawtooth outlet airfoil according to claim 1, characterized in that: A first reinforcement pad (18) is fixedly connected to one side of the cover plates (7) that is close to each other.

5. A Francis turbine fixed guide vane with a sawtooth outlet airfoil according to claim 4, characterized in that: Second reinforcement pads (19) are fixedly connected to both the upper and lower sides of the fixing ring (1).

6. A Francis turbine fixed guide vane with a sawtooth outlet airfoil according to claim 1, characterized in that: A sealing ring (20) is fixedly connected to the side of the seat ring upper ring plate (2) and the seat ring lower ring plate (3) that are close to each other, and the sealing ring (20) is movably connected to the sawtooth edge wing guide vane (5).

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