A water turbine water guide structure with a detachable anti-wear ring and a water turbine

Abstract

The present invention provides a water turbine water guide structure and a water turbine including a detachable anti-wear ring. The water turbine water guide structure including the detachable anti-wear ring comprises: a bottom ring; a guide vane support rod detachably mounted on the bottom ring; movable guide vanes mounted on the guide vane support rod and capable of swinging relative to the bottom ring; and a detachable anti-wear ring covering the surface of the bottom ring facing the movable guide vane, the detachable anti-wear ring being detachably connected to the bottom ring, and having a clearance hole provided on the detachable anti-wear ring for circumventing the guide vane support rod. The technical solution of the present application effectively solves the problem of wear of the bottom ring in the related art, which leads to reduced turbine performance.

Description

Technical Field

[0001] The present invention relates to the technical field of water turbines, and in particular to a water turbine water guide structure with a detachable anti-wear ring and a water turbine. Background Art

[0002] A hydraulic turbine converts the kinetic and potential energy of water into rotational mechanical energy. This turbine drives a generator to generate electricity and is widely used in hydropower stations, providing clean, renewable energy for power generation. As a crucial component of hydropower stations, the efficiency and service life of a hydraulic turbine directly impact the economic viability of its operation.

[0003] The turbine includes a water guide structure that can control and regulate water flow to improve energy conversion efficiency and ensure that the turbine operates in optimal conditions. The water guide structure includes a bottom ring and movable guide vanes swingably arranged on the bottom ring.

[0004] In the related art, since the movable guide vanes need to swing relative to the bottom ring, friction is generated between the movable guide vanes and the bottom ring, which easily wears the bottom ring, resulting in reduced performance of the turbine and increased operating costs. Summary of the Invention

[0005] The main purpose of the present invention is to provide a water turbine water guide structure and a water turbine with a detachable anti-wear ring, so as to solve the problem in the related art that the bottom ring is worn and the performance of the water turbine is reduced.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a water turbine water guide structure with a detachable anti-wear ring is provided, comprising: a bottom ring; a guide vane support rod, which is detachably arranged on the bottom ring; a movable guide vane, which is arranged on the guide vane support rod and can swing relative to the bottom ring; a detachable anti-wear ring, which is covered on the surface of the bottom ring facing the movable guide vane, the detachable anti-wear ring is detachably connected to the bottom ring, and the detachable anti-wear ring is provided with an avoidance hole for avoiding the guide vane support rod.

[0007] Furthermore, the detachable anti-wear ring includes an annular plate and an annular protrusion provided on a surface of the annular plate facing the movable guide vane, and the inner hole of the annular plate is located in the inner hole of the annular protrusion.

[0008] Furthermore, the avoidance hole is provided on the annular plate, and the annular protrusion is located between the outer contour of the annular plate and the outer side of the avoidance hole.

[0009] Furthermore, a contact protrusion is provided on the surface of the annular plate facing the movable guide vane, and the avoidance hole is provided on the contact protrusion.

[0010] Furthermore, the water turbine water guide structure including the detachable anti-wear ring further includes a fastener, and the detachable anti-wear ring is detachably connected to the bottom ring via the fastener.

[0011] Furthermore, a threaded hole is provided on the bottom ring, and a threaded section is provided at one end of the guide vane support rod. The threaded section passes through the avoidance hole and is threadably engaged with the threaded hole.

[0012] Furthermore, an anti-wear layer is provided on the surface of the detachable anti-wear ring facing the movable guide vane.

[0013] Furthermore, the turbine water guide structure containing a detachable anti-wear ring also includes fixed guide vanes fixedly arranged on the bottom ring, the fixed guide vanes and the movable guide vanes are located on the same side of the bottom ring, and the movable guide vanes are located on the inner side of the fixed guide vanes, and the detachable anti-wear ring is located on the inner side of the fixed guide vanes.

[0014] Furthermore, the turbine water guide structure containing detachable anti-wear rings includes multiple detachable anti-wear rings, the diameters and / or thicknesses of the multiple detachable anti-wear rings are different, and one of the multiple detachable anti-wear rings can be selectively arranged between the bottom ring and the movable guide vane.

[0015] According to another aspect of the present invention, a water turbine is provided, comprising a tailwater pipe and a water turbine water guide structure connected to the tailwater pipe, wherein the water turbine water guide structure is the above-mentioned water turbine water guide structure with a detachable anti-wear ring.

[0016] According to the technical solution of the present invention, a water turbine water guide structure including a removable anti-wear ring includes a bottom ring, a guide vane support rod, movable guide vanes, and a removable anti-wear ring. The guide vane support rod is detachably mounted on the bottom ring. The movable guide vanes are mounted on the guide vane support rod and can swing relative to the bottom ring. The removable anti-wear ring cover is mounted on the surface of the bottom ring facing the movable guide vanes. The removable anti-wear ring is detachably connected to the bottom ring and is provided with a clearance hole for the guide vane support rod. As the movable guide vanes swing on the guide vane support rod, the removable anti-wear ring replaces the bottom ring in contact with the movable guide vanes, thereby reducing wear on the bottom ring during swinging of the movable guide vanes. Furthermore, by mounting the removable anti-wear ring on the surface of the bottom ring facing the movable guide vanes and detachably connecting the removable anti-wear ring to the bottom ring, replacement of the removable anti-wear ring after wear is facilitated, thereby ensuring turbine performance, reducing wear on the bottom ring, lowering maintenance costs, and extending the turbine's service life. Furthermore, the detachable guide vane support rod and bottom ring facilitate the removal of the removable anti-wear ring from between the bottom ring and the guide vane support rod, thereby facilitating replacement of the removable anti-wear ring. Therefore, the technical solution of this application effectively solves the problem of bottom ring wear in related technologies, which can lead to reduced turbine performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a water turbine according to the present invention is shown;

[0019] Figure 2 Shown Figure 1 A schematic diagram of the three-dimensional structure of the bottom ring of the water guide structure of the turbine including the detachable anti-wear ring and the detachable anti-wear ring;

[0020] Figure 3 Shown Figure 1 A schematic diagram of the exploded structure of the bottom ring of the water guide structure of the turbine with a detachable anti-wear ring and the detachable anti-wear ring;

[0021] Figure 4 Shown Figure 1 A schematic top view of a detachable anti-wear ring of a water turbine water guide structure containing a detachable anti-wear ring.

[0022] The above drawings include the following reference numerals:

[0023] 10. Bottom ring;

[0024] 20. Guide vane support rod;

[0025] 30. Movable guide vanes;

[0026] 40. Removable anti-wear ring; 41. Annular plate; 42. Annular protrusion; 43. Avoidance hole; 44. Screw hole;

[0027] 50. Fixed guide vane;

[0028] 61. Seat ring; 62. Support member;

[0029] 70. Tailwater pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] In this embodiment, if Figure 1 As shown, the turbine water guide structure with a removable anti-wear ring includes a bottom ring 10, a guide vane support rod 20, a movable guide vane 30, and a removable anti-wear ring 40. The guide vane support rod 20 is detachably mounted on the bottom ring 10. The movable guide vane 30 is mounted on the guide vane support rod 20 and is capable of swinging relative to the bottom ring 10. The removable anti-wear ring 40 is mounted on the surface of the bottom ring 10 facing the movable guide vane 30 and is removably connected to the bottom ring 10. The removable anti-wear ring 40 is provided with a clearance hole 43 for the guide vane support rod 20 to clear.

[0034] In this way, when the movable guide vane 30 swings on the guide vane support rod 20, the removable anti-wear ring 40 can replace the bottom ring 10 in contact with the movable guide vane 30, thereby reducing wear on the bottom ring 10 during the swinging of the movable guide vane 30. Furthermore, by providing the removable anti-wear ring 40 on the surface of the bottom ring 10 facing the movable guide vane 30 and by detachably connecting the removable anti-wear ring 40 to the bottom ring 10, replacement of the removable anti-wear ring 40 after wear is facilitated, thereby ensuring turbine performance, reducing wear on the bottom ring 10, lowering maintenance costs, and extending the turbine's service life. Furthermore, the removable arrangement of the guide vane support rod 20 and the bottom ring 10 facilitates removal of the removable anti-wear ring 40 from between the bottom ring 10 and the guide vane support rod 20, thereby facilitating replacement of the removable anti-wear ring 40. Therefore, the technical solution of this embodiment effectively solves the problem of wear of the bottom ring 10 in the related art, which can lead to reduced turbine performance.

[0035] like Figures 1 to 4 As shown, the removable anti-wear ring 40 includes an annular plate 41 and an annular protrusion 42 disposed on the surface of the annular plate 41 facing the movable guide vanes 30. The inner hole of the annular plate 41 is located within the inner hole of the annular protrusion 42. The annular protrusion 42 on the removable anti-wear ring 40 optimizes the distribution and guidance of water flow, reduces the concentrated impact of water flow on the surface of the removable anti-wear ring 40, and achieves a more even distribution of water flow, thereby improving the energy conversion efficiency of the turbine. Furthermore, the annular protrusion 42 enhances the structural strength of the removable anti-wear ring 40, improving the operating efficiency and stability of the turbine, and reducing maintenance costs.

[0036] In this embodiment, the removable anti-wear ring 40 is located at the bottom of the movable guide vane 30, and the bottom ring 10 is located at the bottom of the removable anti-wear ring 40. The bottom of the movable guide vane 30 contacts the surface of the removable anti-wear ring 40. The bottom surface of the removable anti-wear ring 40 is arranged in contact with the top surface of the bottom ring 10.

[0037] The inventors have found that when the water flow velocity is too high, the local water flow velocity near the inner side of the connection between the movable guide vane 30 and the bottom ring 10 will be too fast, which will easily erode the inner surface of the movable guide vane 30 and the bottom ring 10.

[0038] Therefore, in other embodiments, the detachable anti-wear ring 40 further includes an anti-wear flange connected to the inner hole of the annular plate 41, and the anti-wear flange extends into the inner hole of the bottom ring 10. The provision of the anti-wear flange can reduce wear on the inner side of the bottom ring 10, reduce the impact wear on the inner side of the bottom ring 10 caused by sand-laden water flow, reduce the high-speed scouring between the movable guide vanes 30 and the inner side of the bottom ring 10 caused by high-speed water flow passing through the inner side of the bottom ring 10, and reduce the problem of surface erosion on the movable guide vanes 30 and the inner side of the bottom ring 10.

[0039] In this embodiment, the annular plate 41 , the annular protrusion 42 and the anti-wear flange are an integrally formed structure, which has high mechanical stability and anti-wear performance.

[0040] like Figures 1 to 4 As shown, the avoidance hole 43 is provided on the annular plate 41, and the annular protrusion 42 is located between the outer contour of the annular plate 41 and the outer side of the avoidance hole 43. The relative positioning of the avoidance hole 43 and the annular protrusion 42 reduces direct contact between the movable guide vane 30 and the removable anti-wear ring 40 during swinging, thereby reducing wear on the annular protrusion 42 and increasing the structural stability of the removable anti-wear ring 40.

[0041] It should be noted that the annular plate 41 has an inner annular side wall and an outer annular side wall, and the outer contour of the annular plate 41 refers to the outer annular side wall.

[0042] Furthermore, the surface of the annular plate 41 facing the movable guide vanes 30 is provided with contact protrusions, and the avoidance holes 43 are disposed on the contact protrusions. The provision of the contact protrusions allows the movable guide vanes 30 to contact the contact protrusions, reducing the contact area between the removable anti-wear ring 40 and the movable guide vanes 30. This reduces wear on the removable anti-wear ring 40 caused by the movable guide vanes 30, reduces the replacement frequency of the removable anti-wear ring 40, and lowers maintenance costs. Furthermore, the provision of the contact protrusions effectively disperses the impact force of the water flow, protecting the movable guide vanes 30, the removable anti-wear ring 40, and the bottom ring 10, while also improving the operating efficiency of the turbine.

[0043] Furthermore, the turbine water guide structure including the removable anti-wear ring further includes fasteners, through which the removable anti-wear ring 40 is detachably connected to the bottom ring 10. This detachable connection of the removable anti-wear ring 40 to the bottom ring 10 via the fasteners facilitates installation and replacement of the removable anti-wear ring 40, eliminating the need to disassemble the entire turbine and reducing maintenance costs and time.

[0044] In this embodiment, the fastener is made of corrosion-resistant material, and the fastener is a bolt. The detachable anti-wear ring 40 is provided with a plurality of screw holes 44, and the bolts are passed through the screw holes 44.

[0045] Furthermore, a threaded hole is provided in the bottom ring 10, and a threaded section is provided at one end of the guide vane support rod 20. The threaded section passes through the avoidance hole 43 and engages with the threaded hole. The combination of the threaded hole in the bottom ring 10 and the threaded section on the guide vane support rod 20 increases the ease of assembly and disassembly of the guide vane support rod 20, facilitating its removal and installation, thereby facilitating the replacement of the detachable anti-wear ring 40, improving the operational stability of the turbine, and reducing maintenance time and costs.

[0046] In other embodiments, a blind hole is provided on the bottom ring 10 , one end of the guide vane support rod 20 is inserted into the blind hole, and one end of the guide vane support rod 20 is rotatably provided in the blind hole.

[0047] Furthermore, an anti-wear layer is provided on the surface of the detachable anti-wear ring 40 facing the movable guide vane 30. Providing the anti-wear layer on the surface of the detachable anti-wear ring 40 further enhances the wear resistance of the detachable anti-wear ring 40, extends the service life of the detachable anti-wear ring 40, reduces the replacement frequency, and reduces maintenance costs.

[0048] In this embodiment, the anti-wear layer is preferably made of a wear-resistant alloy material or a composite material with high wear resistance, preferably a chromium carbide wear-resistant alloy material, a high manganese alloy wear-resistant material or a chromium carbide composite material.

[0049] In other embodiments, the detachable anti-wear ring 40 is preferably made of a wear-resistant alloy material or a composite material with high wear resistance.

[0050] like Figure 1 As shown, the turbine water guide structure with a removable anti-wear ring further includes fixed guide vanes 50 fixedly mounted on the bottom ring 10. The fixed guide vanes 50 and movable guide vanes 30 are located on the same side of the bottom ring 10, with the movable guide vanes 30 located inwardly of the fixed guide vanes 50, and the removable anti-wear ring 40 located inwardly of the fixed guide vanes 50. The rational layout of the fixed guide vanes 50 and movable guide vanes 30 ensures efficient water flow guidance, improving the overall operating efficiency of the turbine. At the same time, the provision of the removable anti-wear ring 40 effectively protects the bottom ring 10 and movable guide vanes 30, extending the service life of the turbine.

[0051] In this embodiment, the fixed guide vanes 50 and the movable guide vanes 30 are located on the same side of the bottom ring 10 , which means that the fixed guide vanes 50 and the movable guide vanes 30 are both located on the upper side of the bottom ring 10 .

[0052] Furthermore, the turbine water guide structure including removable anti-wear rings includes multiple removable anti-wear rings 40, each having different diameters and / or thicknesses. One of the multiple removable anti-wear rings 40 can be selectively positioned between the base ring 10 and the movable guide vanes 30. The provision of removable anti-wear rings 40 of varying diameters and thicknesses allows for the selection of the most appropriate removable anti-wear ring 40 for installation according to the different stages of turbine operation and the dimensions of the movable guide vanes 30. This improves the adaptability and flexibility of the device and ensures efficient turbine operation under various operating conditions.

[0053] The present application also provides a water turbine, such as Figure 1As shown, the turbine includes a draft tube 70 and a turbine water guide structure connected to the draft tube 70. The turbine water guide structure is the aforementioned turbine water guide structure with a removable anti-wear ring. Because this turbine water guide structure addresses the related art issue of wear on the bottom ring 10, which can lead to decreased turbine performance, turbines equipped with this turbine water guide structure can address the same technical issues. Thus, the connection between the draft tube 70 and the turbine water guide structure enhances the overall performance of the turbine, improving energy conversion efficiency while also reducing wear on the bottom ring 10, extending the turbine maintenance cycle, and reducing operating costs.

[0054] In this embodiment, the turbine also includes a seat ring 61, which is located above the movable guide vanes 30. Water first passes through the removable anti-wear ring 40 before entering the cavity between the bottom ring 10 and the seat ring 61. The movable guide vanes 30 and the bottom ring 10 are core components that ensure efficient operation of the turbine. Their primary function is to recover the kinetic energy of the water flow and ensure stable flow within the draft tube 70. The turbine also includes a support member 62 supported below the bottom ring 10.

[0055] The inventors discovered that before water flows through the movable guide vanes 30 and the bottom ring 10, the water accelerates to adapt to the shape of the seat ring 61, the movable guide vanes 30, and the bottom ring 10. This high-speed water flow carries sand and impacts the movable guide vanes 30 and the upper end of the bottom ring 10, accelerating erosion of the trailing ends of the movable guide vanes 30 and the upper end and inner side of the bottom ring 10. In this embodiment, by adding an independent, removable anti-wear ring 40, it replaces the upper end and inner side of the bottom ring 10 with the resistance to high-speed water flow impact and erosion, ensuring the safety of the turbine's main structure.

[0056] In this embodiment, the turbine further comprises a drain cone disposed on top of the movable guide vane 30. The drain cone is an integrally formed part. The provision of the detachable anti-wear ring 40 can prevent cavitation from occurring in the cavity of the drain cone.

[0057] In this embodiment, when high-speed water impacts the removable anti-wear ring 40, it may cause continuous erosion on the surface and interior of the removable anti-wear ring 40. When the eroded volume on the removable anti-wear ring 40 reaches a certain level, the removable anti-wear ring 40 needs to be replaced. When replacing the removable anti-wear ring 40, the removable anti-wear ring 40 can be removed and replaced by removing the fasteners, eliminating the need to replace the base ring 10, thereby reducing maintenance costs and difficulty.

[0058] In summary, the turbine water guide structure with detachable anti-wear ring in this embodiment has effectively improved the operating efficiency of the turbine through the above-mentioned improvements, extended the service life of the equipment, reduced maintenance costs, and provided a more economical and environmentally friendly operation solution for the hydropower station.

[0059] In this embodiment, the water turbine is preferably a Francis turbine, which is a type of water turbine that can adapt to different water flow conditions.

[0060] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0063] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A water turbine water guide structure with a detachable anti-wear ring, characterized in that: include: Bottom ring (10); A guide vane support rod (20) is detachably arranged on the bottom ring (10); A movable guide vane (30) is arranged on the guide vane support rod (20), and the movable guide vane (30) can swing relative to the bottom ring (10); a detachable anti-wear ring (40) covering the surface of the bottom ring (10) facing the movable guide vane (30), the detachable anti-wear ring (40) being detachably connected to the bottom ring (10), and a relief hole (43) for avoiding the guide vane support rod (20) being provided on the detachable anti-wear ring (40); The detachable anti-wear ring (40) comprises an annular plate (41) and an annular protrusion (42) provided on a surface of the annular plate (41) facing the movable guide vane (30), and an inner hole of the annular plate (41) is located within the inner hole of the annular protrusion (42).

2. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: The avoidance hole (43) is provided on the annular plate (41), and the annular protrusion (42) is located between the outer contour of the annular plate (41) and the outer side of the avoidance hole (43).

3. The water turbine water guide structure with a detachable anti-wear ring according to claim 2, characterized in that: A contact protrusion is provided on the surface of the annular plate (41) facing the movable guide vane (30), and the avoidance hole (43) is provided on the contact protrusion.

4. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: The water turbine water guide structure including the detachable anti-wear ring further comprises a fastener, and the detachable anti-wear ring (40) is detachably connected to the bottom ring (10) via the fastener.

5. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: A threaded hole is provided on the bottom ring (10), and a threaded section is provided at one end of the guide vane support rod (20). The threaded section passes through the avoidance hole (43) and is threadably engaged with the threaded hole.

6. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: An anti-wear layer is provided on the surface of the detachable anti-wear ring (40) facing the movable guide vane (30).

7. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: The water turbine water guide structure including the detachable anti-wear ring further comprises a fixed guide vane (50) fixedly arranged on the bottom ring (10), the fixed guide vane (50) and the movable guide vane (30) are located on the same side of the bottom ring (10), the movable guide vane (30) is located on the inner side of the fixed guide vane (50), and the detachable anti-wear ring (40) is located on the inner side of the fixed guide vane (50).

8. The water turbine water guide structure with a detachable anti-wear ring according to claim 1, characterized in that: The water turbine water guide structure including detachable anti-wear rings comprises a plurality of detachable anti-wear rings (40), wherein the diameters and / or thicknesses of the plurality of detachable anti-wear rings (40) are different, and one of the plurality of detachable anti-wear rings (40) is selectively arranged between the bottom ring (10) and the movable guide vane (30).

9. A water turbine comprising a tailwater pipe (70) and a water turbine water guide structure connected to the tailwater pipe (70), characterized in that: The water turbine water guide structure is the water turbine water guide structure comprising a detachable anti-wear ring according to any one of claims 1 to 8.

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