Anti-cavitation mixed flow guide vane

Abstract

The utility model provides a kind of anti cavitation mixed flow guide vane, belong to mixed flow guide vane technical field, comprising: annular seat, the guide vane structure is installed in annular seat inner cavity, the guide vane structure includes cylinder, the cylinder is fixedly installed with annular seat inner cavity, and multiple docking pieces are installed on the outer wall of the cylinder, multiple the blade is fixedly installed on the outer wall of docking piece, by docking piece, single blade can be conveniently disassembled from cylinder, so that single blade can be disassembled and replaced when cavitation occurs, by the cooperation of threaded column and nut, the whole guide vane structure can be disassembled from annular seat inside, and overall replacement is carried out, and guide vane structure uses high hardness, high plasticity material (such as nickel-chromium stainless steel), and its cavitation resistance is about 50% higher than that of low carbon steel.

Description

Technical Field

[0001] This utility model relates to the field of mixed-flow guide vane technology, and in particular to an anti-cavitation mixed-flow guide vane. Background Technology

[0002] Guide vanes are energy conversion devices used in hydraulic machinery such as centrifugal pumps and water turbines to convert the kinetic energy of liquid into pressure energy. They are mainly used in multi-stage centrifugal pumps. Their core function is to collect the liquid thrown out by the impeller, reduce the flow velocity through the diffuser-shaped flow channel, and realize the conversion of kinetic energy into static pressure energy, while guiding the fluid into the next stage impeller or outlet pipe.

[0003] Currently, most mixed-flow turbine guide vanes on the market adopt a structure design that is integrally fixed with the seat ring. While this design offers advantages in overall rigidity and installation stability, it also presents significant maintenance challenges. Since the guide vanes and seat rings are typically welded or integrally cast, if a single guide vane suffers damage such as cavitation, wear, or cracks, it is often difficult to replace it individually. Instead, the entire seat ring assembly must be disassembled for repair or even scrapped for replacement. This not only significantly increases the complexity and time cost of equipment maintenance but also leads to high spare parts procurement costs and extended downtime, significantly impacting the economic efficiency and safety of power plant operation. Therefore, this application proposes a cavitation-resistant mixed-flow guide vane. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the above-mentioned background technology by proposing an anti-cavitation mixed flow guide vane.

[0005] The technical problem to be solved by this utility model is to provide an anti-cavitation mixed-flow guide vane to solve the problem of inconvenient disassembly and replacement of existing ones.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A cavitation-resistant mixed-flow guide vane includes: an annular seat, an inner cavity of which a guide vane structure is installed, the guide vane structure including a cylinder, the cylinder being fixedly installed in the inner cavity of the annular seat, and a plurality of mating parts being installed on the outer wall of the cylinder, each of the plurality of mating parts having blades fixedly installed on its outer wall.

[0007] Preferably, the annular seat includes a seat frame, the outer wall of the seat frame is provided with a plurality of through grooves I, and the outer wall of the seat frame is also provided with a plurality of through grooves II, and a cover frame is movably installed in the inner cavity of the seat frame.

[0008] Preferably, the outer wall of the cover frame is provided with multiple limiting grooves, and the inner wall of the seat frame is fixedly installed with multiple limiting blocks, which are movably inserted into the inner cavity of the corresponding limiting groove.

[0009] Preferably, both the cover and the base are provided with round holes, and threaded columns are rotatably connected to both sides of the outer wall of the cylinder. The two threaded columns on opposite sides pass through the corresponding round holes, and nuts are threaded onto the outer walls of both threaded columns.

[0010] Preferably, the docking component includes a docking plate, the outer wall of which is fixedly connected to the blade, and a plurality of docking grooves are provided on the outer wall of the cylinder, with the docking plate movably inserted into the inner cavity of the corresponding docking groove.

[0011] Preferably, two docking holes are provided on the inner wall of the docking groove, a horizontal groove is provided on the docking plate, a spring is provided in the inner cavity of the horizontal groove, and docking blocks are fixedly connected to both ends of the spring. One side of the docking block is movably inserted into the inner cavity of the corresponding docking hole.

[0012] Preferably, a connecting groove is provided on the top of the inner wall of the transverse groove, and a handle is movably installed through the inner cavity of the connecting groove, with one side of the handle being fixedly connected to the outer wall of the docking block.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, the individual blades can be easily disassembled from the cylinder through the docking parts, so that when cavitation erosion occurs in an individual blade, it can be disassembled and replaced. Through the cooperation of the threaded column and nut, the entire guide vane structure can be removed from the inside of the annular seat for overall replacement. Moreover, the guide vane structure is made of high hardness and high plasticity materials (such as nickel-chromium stainless steel), and its cavitation erosion resistance is improved by about 50% compared with low carbon steel. Attached Figure Description

[0014] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0015] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the guide vane structure of this utility model; Figure 3 This is an exploded view of the guide vane structure of this utility model; Figure 4 This is a schematic cross-sectional view of the docking component of this utility model; Figure 5 This is a schematic diagram of the structure of the annular seat of this utility model.

[0016] [Figure Labels] 1. Annular seat; 11. Seat frame; 12. Through slot one; 13. Through slot two; 14. Cover frame; 15. Limiting slot; 16. Limiting block; 17. Circular hole; 2. Guide vane structure; 21. Cylinder; 22. Blade; 23. Connecting part; 231. Connecting groove; 232. Connecting hole; 233. Connecting plate; 234. Horizontal groove; 235. Spring; 236. Connecting block; 237. Connecting groove; 238. Handle; 24. Threaded post; 25. Nut.

[0017] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The embodiment of the present invention provides an anti-cavitation mixed-flow guide vane, which includes: an annular seat 1, a guide vane structure 2 installed in the inner cavity of the annular seat 1, the guide vane structure 2 including a cylinder 21, the cylinder 21 being fixedly installed in the inner cavity of the annular seat 1, and a plurality of connecting parts 23 being installed on the outer wall of the cylinder 21, and blades 22 being fixedly installed on the outer wall of each of the plurality of connecting parts 23.

[0021] Specifically, the annular seat 1 is installed in a suitable position, and the guide vane structure 2 is used to guide the fluid. When disassembly is required, the docking part 23 is removed from the cylinder 21 to disassemble the blade 22. If the entire guide vane structure 2 needs to be disassembled, the annular seat 1 is disassembled and then the guide vane structure 2 is disassembled. The operation is convenient.

[0022] In this embodiment, as Figure 5 As shown; the annular seat 1 includes a seat frame 11, a plurality of through slots 12 are provided on the outer wall of the seat frame 11, and a plurality of through slots 23 are also provided on the outer wall of the seat frame 11, and a cover frame 14 is movably installed in the inner cavity of the seat frame 11.

[0023] Specifically, by setting multiple through slots 12 and through slots 23, fluid can enter the interior of the annular seat 1 and be guided by the blades 22. The cover frame 14 is set to seal the side of the seat frame 11, so that the guide vane structure 2 can be stably installed inside the seat frame 11.

[0024] In this embodiment, as Figure 5 As shown, multiple limiting grooves 15 are provided on the outer wall of the cover frame 14, and multiple limiting blocks 16 are fixedly installed on the inner wall of the seat frame 11. The limiting blocks 16 are movably inserted into the inner cavity of the corresponding limiting groove 15.

[0025] Specifically, the limiting groove 15 and the limiting block 16 are used to achieve the limiting operation of the installation between the cover frame 14 and the base frame 11.

[0026] In this embodiment, as Figure 5 As shown; both the cover frame 14 and the base frame 11 have round holes 17. Both sides of the outer wall of the cylinder 21 are rotatably connected with threaded columns 24. The two threaded columns 24 are respectively passed through the corresponding round holes 17 on the opposite side, and both threaded columns 24 are threaded with nuts 25 on their outer walls.

[0027] Specifically, by using the threaded post 24 to pass through the round hole 17 and with the nut 25 for limiting, the fixed operation between the cover frame 14 and the base frame 11 can be realized. It can also realize the fixed installation of the guide vane structure 2 inside the base frame 11 without affecting the rotation of the guide vane structure 2.

[0028] In this embodiment, as Figures 3-4 As shown; the docking component 23 includes a docking plate 233, the outer wall of the docking plate 233 is fixedly connected to the blade 22, and a plurality of docking grooves 231 are provided on the outer wall of the cylinder 21, and the docking plate 233 is movably inserted into the inner cavity of the corresponding docking groove 231.

[0029] Specifically, the blade 22 and the cylinder 21 are movably installed through the insertion between the docking plate 233 and the docking groove 231, and subsequent disassembly and replacement operations are convenient.

[0030] In this embodiment, as Figure 4 As shown; two docking holes 232 are provided on the inner wall of the docking groove 231, and a horizontal groove 234 is provided on the docking plate 233. A spring 235 is provided in the inner cavity of the horizontal groove 234. Both ends of the spring 235 are fixedly connected to docking blocks 236. One side of the docking block 236 is movably inserted into the inner cavity of the corresponding docking hole 232.

[0031] Specifically, the blade 22 and the cylinder 21 are fixedly installed by inserting the docking block 236 on the docking plate 233 into the docking hole 232, which improves the stability of the installation. When disassembling later, the docking block 236 can be pulled out of the docking hole 232, which is convenient to operate.

[0032] In this embodiment, as Figure 4 As shown; a connecting groove 237 is provided on the top of the inner wall of the transverse groove 234, and a handle 238 is movably installed through the inner cavity of the connecting groove 237. One side of the handle 238 is fixedly connected to the outer wall of the docking block 236.

[0033] Specifically, the two handles 238 allow for control of the movement of the docking block 236, making it easier to disassemble and replace the blade 22.

[0034] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cavitation-resistant mixed-flow guide vane, characterized in that, include: An annular seat (1) has a guide vane structure (2) installed in its inner cavity. The guide vane structure (2) includes a cylinder (21). The cylinder (21) is fixedly installed in the inner cavity of the annular seat (1), and multiple docking parts (23) are installed on the outer wall of the cylinder (21). Blades (22) are fixedly installed on the outer walls of the multiple docking parts (23).

2. The anti-cavitation mixed-flow guide vane according to claim 1, characterized in that: The annular seat (1) includes a seat frame (11), a plurality of through slots (12) are provided on the outer wall of the seat frame (11), and a plurality of through slots (13) are also provided on the outer wall of the seat frame (11), and a cover frame (14) is movably installed in the inner cavity of the seat frame (11).

3. The anti-cavitation mixed-flow guide vane according to claim 2, characterized in that: The outer wall of the cover frame (14) is provided with multiple limiting grooves (15), and multiple limiting blocks (16) are fixedly installed on the inner wall of the seat frame (11). The limiting blocks (16) are movably inserted into the inner cavity of the corresponding limiting groove (15).

4. The anti-cavitation mixed-flow guide vane according to claim 3, characterized in that: Both the cover frame (14) and the base frame (11) are provided with round holes (17). Both sides of the outer wall of the cylinder (21) are rotatably connected with threaded columns (24). The two threaded columns (24) are respectively connected through the corresponding round holes (17) on the opposite side. Both threaded columns (24) are threaded with nuts (25) on their outer walls.

5. The anti-cavitation mixed-flow guide vane according to claim 1, characterized in that: The docking component (23) includes a docking plate (233), the outer wall of the docking plate (233) is fixedly connected to the blade (22), and a plurality of docking grooves (231) are provided on the outer wall of the cylinder (21), and the docking plate (233) is movably inserted into the inner cavity of the corresponding docking groove (231).

6. The anti-cavitation mixed-flow guide vane according to claim 5, characterized in that: Two docking holes (232) are provided on the inner wall of the docking groove (231). A horizontal groove (234) is provided on the docking plate (233). A spring (235) is provided in the inner cavity of the horizontal groove (234). A docking block (236) is fixedly connected to both ends of the spring (235). One side of the docking block (236) is movably inserted into the inner cavity of the corresponding docking hole (232).

7. The anti-cavitation mixed-flow guide vane according to claim 6, characterized in that: A connecting groove (237) is provided on the top of the inner wall of the transverse groove (234). A handle (238) is movably installed through the inner cavity of the connecting groove (237). One side of the handle (238) is fixedly connected to the outer wall of the docking block (236).

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