Mixed-flow water turbine volute capable of reducing deformation of joint with concrete and water turbine

Abstract

The invention provides a mixed-flow water turbine volute capable of reducing deformation of a joint with concrete and a water turbine. The water turbine volute comprises a shell, a water inlet and a water outlet, the reinforcing plate group comprises a plurality of reinforcing plates, the reinforcing plates are arranged on the periphery of the shell at intervals in the circumferential direction of the shell, the extending direction of the reinforcing plates is the same as the axis direction of the shell, and reinforcing holes are formed in the reinforcing plates. According to the technical scheme, the problem that a volute moves relative to concrete due to deformation in the prior art can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of water turbines, and in particular to a Francis turbine volute and a water turbine capable of reducing deformation of a joint with concrete. Background Art

[0002] The volute is an important part of the Francis turbine. It uses a unique flow channel design to make the water flow more smoothly and orderly into the runner blades of the turbine, preventing the water flow from directly impacting the blades and causing damage, providing protection for the runner blades. At the same time, the momentum and pressure energy of the water flow are effectively transmitted and utilized to achieve the smooth rotation of the turbine. In addition, the volute is cast in concrete, which plays an important protective role in the structural safety and stability of the whole machine.

[0003] Among them, the volute may be deformed due to changes in internal water pressure, temperature changes and other factors. For example, insufficient foundation stiffness may cause the volute to twist and deform under the action of internal water pressure, thereby causing the volute to move relative to the concrete. The deformation of the volute will directly affect its water diversion effect, may increase hydraulic losses, and thus affect the power generation efficiency of the hydropower station. In addition, deformation may also cause uneven pressure distribution inside the volute, increase the stress of the concrete structure, and thus affect the safe operation of the hydropower station. Summary of the invention

[0004] The present invention provides a Francis turbine volute and a turbine capable of reducing deformation of a joint with concrete, so as to solve the problem in the related art that the volute moves relative to the concrete due to deformation.

[0005] According to one aspect of the present invention, a mixed flow turbine volute that reduces deformation of the joint with concrete is provided, the turbine volute comprising: a shell; a reinforcement plate group, comprising a plurality of reinforcement plates, the plurality of reinforcement plates being arranged at intervals along the circumference of the shell on the outer periphery of the shell, the extension direction of the reinforcement plates being the same as the axial direction of the shell, and reinforcement holes being arranged on the reinforcement plates.

[0006] Further, the reinforcement plate group includes a plurality of first reinforcement plates and a plurality of second reinforcement plates, the first reinforcement plates and the second reinforcement plates have different sizes, the plurality of first reinforcement plates are arranged on the outside of the plurality of second reinforcement plates, the plurality of first reinforcement plates and the plurality of second reinforcement plates are arranged on the outer periphery of the shell at intervals along the circumferential direction of the shell, the extension direction of the first reinforcement plates and the extension direction of the second reinforcement plates are both the same as the axial direction of the shell, and the reinforcement holes include a first reinforcement hole arranged on the first reinforcement plate and a second reinforcement hole arranged on the second reinforcement plate.

[0007] Furthermore, the first reinforcing plate is a conical plate, and the inner diameter of the first reinforcing plate gradually increases in the direction away from the shell; and / or the second reinforcing plate is a conical plate, and the inner diameter of the second reinforcing plate gradually decreases in the direction away from the shell.

[0008] Further, the length dimension of the first reinforcing plate is greater than the length dimension of the second reinforcing plate.

[0009] Furthermore, the diameter of the first reinforcement hole is greater than or equal to 450 mm and less than or equal to 550 mm; and / or the diameter of the second reinforcement hole is greater than or equal to 250 mm and less than or equal to 350 mm.

[0010] Further, the width dimension of the first reinforcing plate is greater than or equal to 900 mm and less than or equal to 1100 mm; and / or the width dimension of the second reinforcing plate is greater than or equal to 600 mm and less than or equal to 700 mm.

[0011] Furthermore, the reinforcing plate includes a connected straight plate section and an arc-shaped plate section, the shell includes a connected straight cylinder section and an arc-shaped cylinder section, the inner side of the straight plate section is connected to the outer wall of the straight cylinder section, and the inner side of the arc-shaped plate section is connected to the outer wall of the arc-shaped cylinder section.

[0012] Furthermore, there are a plurality of reinforcement holes, and the plurality of reinforcement holes are arranged at intervals along the extension direction of the reinforcement plate.

[0013] Furthermore, the angle between two adjacent reinforcing plates is 90°.

[0014] According to another aspect of the present invention, a water turbine is provided. The water turbine comprises the Francis turbine volute for reducing the deformation of the joint with concrete provided above.

[0015] By applying the technical solution of the present invention, the turbine volute includes a shell and a reinforcement plate group. During the pouring of concrete, the shell is buried in the concrete, and the contact area between the shell and the concrete can be increased by using a plurality of reinforcement plates to increase the limiting effect on the volute. At the same time, the reinforcement holes arranged on the reinforcement plates can allow concrete to flow through to avoid the generation of interaction force between the reinforcement plates and the shell due to the squeezing effect of the concrete, thereby reducing the deformation of the volute during the operation of the turbine through the reinforcement plates, and reducing the deformation of the joint between the volute and the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a turbine volute according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic structural diagram of a first reinforcing plate of a turbine volute provided according to an embodiment of the present invention is shown;

[0019] Figure 3 A schematic structural diagram of a second reinforcing plate of a turbine volute provided according to an embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Shell; 11. Straight cylinder section; 12. Arc cylinder section;

[0022] 20. Reinforcement plate group; 21. First reinforcement plate; 211. First reinforcement hole; 22. Second reinforcement plate; 221. Second reinforcement hole; 23. Straight plate segment; 24. Arc plate segment. DETAILED DESCRIPTION

[0023] The following will be combined with the 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 described embodiments 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 by no means 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 creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 3 As shown, an embodiment of the present invention provides a mixed flow turbine volute that reduces deformation of the joint with concrete. The turbine volute includes a shell 10 and a reinforcement plate group 20. The reinforcement plate group 20 includes a plurality of reinforcement plates. The plurality of reinforcement plates are arranged at intervals along the circumference of the shell 10 on the outer periphery of the shell 10. The extension direction of the reinforcement plates is the same as the axial direction of the shell 10. Reinforcement holes are arranged on the reinforcement plates.

[0025] By applying the technical solution of the present invention, the turbine volute includes a shell 10 and a reinforcement plate group 20. During the pouring of concrete, the shell 10 is buried in the concrete, and the contact area between the shell 10 and the concrete can be increased by using a plurality of reinforcement plates to increase the limiting effect on the volute. At the same time, the reinforcement holes provided on the reinforcement plates can allow concrete to flow through to avoid the generation of interaction force between the reinforcement plates and the shell 10 due to the squeezing effect of the concrete, thereby reducing the deformation of the volute during the operation of the turbine through the reinforcement plates, and reducing the deformation at the joint between the volute and the concrete.

[0026] It should be noted that, in order to further reduce the interaction force between the shell 10 and the reinforcing plates, the multiple reinforcing plates cannot interfere with each other, and the reinforcing plates extend along the axial direction of the shell 10 .

[0027] In this embodiment, by providing a plurality of reinforcing plates, the contact area between the housing 10 and the concrete can be further increased, so that the volute is further fixed and the deformation of the joint between the volute and the concrete is reduced.

[0028] In addition, the reinforcing plate can increase the contact area with the concrete, ensure full and tight filling of the concrete during the concrete pouring process, strengthen the restriction of the concrete on the volute, and reduce the deformation of the volute during the operation of the unit.

[0029] Here, multiple refers to two or more.

[0030] like Figure 1 As shown, the reinforcing plate group 20 includes a plurality of first reinforcing plates 21 and a plurality of second reinforcing plates 22. The first reinforcing plates 21 and the second reinforcing plates 22 have different sizes. The plurality of first reinforcing plates 21 are all arranged outside the plurality of second reinforcing plates 22. The plurality of first reinforcing plates 21 and the plurality of second reinforcing plates 22 are arranged at intervals on the outer periphery of the shell 10 along the circumferential direction of the shell 10. The extension direction of the first reinforcing plates 21 and the extension direction of the second reinforcing plates 22 are both the same as the axial direction of the shell 10. The reinforcing holes include a first reinforcing hole 211 arranged on the first reinforcing plate 21 and a second reinforcing hole 221 arranged on the second reinforcing plate 22. With the above-mentioned reinforcing plate group 20, the contact area between the outer side of the shell 10 and the concrete can be increased by using the first reinforcing plates 21, and the contact area between the inner side of the shell 10 and the concrete can be increased by using the second reinforcing plates 22, so that the contact area with the concrete can be increased in the entire circumferential direction of the shell 10, and the deformation of the joint between the volute and the concrete can be reduced.

[0031] In other embodiments, the first reinforcing plates 21 and the second reinforcing plates 22 may be alternately arranged on the outer periphery of the housing 10. Furthermore, the first reinforcing plates 21 and the second reinforcing plates 22 cannot interfere with each other.

[0032] like Figure 1 and Figure 2 As shown, the first reinforcing plate 21 is a tapered plate, and the inner diameter of the first reinforcing plate 21 gradually increases in the direction away from the shell 10, and the second reinforcing plate 22 is a tapered plate, and the inner diameter of the second reinforcing plate 22 gradually decreases in the direction away from the shell 10. With the above arrangement, the first reinforcing plate 21 and the second reinforcing plate 22 can both have a larger width without interfering with each other, so as to further increase the contact area with the concrete.

[0033] It should be noted that the first reinforcing plate 21 and the second reinforcing plate 22 do not extend along the axial direction of the entire shell 10 , but only extend from the inlet of the shell 10 to the middle of the shell 10 .

[0034] like Figure 1As shown, the length of the first reinforcing plate 21 is greater than that of the second reinforcing plate 22. With the above arrangement, the first reinforcing plate 21 can have a sufficient length to increase the contact area with concrete while being compatible with the outer shape of the housing 10.

[0035] Due to the structural form of the volute, the housing 10 is a circular structure, so that the outer wall length of the housing 10 is greater than the inner wall length. Thus, the length of the first reinforcing plate 21 can be greater than the length of the second reinforcing plate 22.

[0036] In this embodiment, the diameter of the first reinforcement hole 211 is greater than or equal to 450 mm and less than or equal to 550 mm. By adopting the above-mentioned size range, while ensuring that the first reinforcement plate 21 has reasonable strength, the first reinforcement hole 211 has a suitable size range to allow concrete to flow through and increase the contact area with the concrete.

[0037] The diameter of the first reinforcement hole 211 may be 450 mm, 480 mm, 500 mm, 520 mm, 550 mm, or any other value greater than or equal to 450 mm and less than or equal to 550 mm.

[0038] Specifically, the diameter of the second reinforcement hole 221 is greater than or equal to 250 mm and less than or equal to 350 mm. With the above size range, under the premise of ensuring that the second reinforcement plate 22 has reasonable strength, the second reinforcement hole 221 has a suitable size range to allow concrete to flow through and increase the contact area with the concrete.

[0039] The diameter of the second reinforcement hole 221 may be 250 mm, 280 mm, 300 mm, 320 mm, 350 mm, or any other value greater than or equal to 250 mm and less than or equal to 350 mm.

[0040] In this embodiment, the width dimension of the first reinforcing plate 21 is greater than or equal to 900 mm and less than or equal to 1100 mm. By adopting the above width dimension, the contact area between the first reinforcing plate 21 and the concrete can be increased without affecting the connection strength between the first reinforcing plate 21 and the shell 10 due to the excessive width dimension of the first reinforcing plate 21.

[0041] The width of the first reinforcing plate 21 may be 900 mm, 950 mm, 1000 mm, 1050 mm, 1100 mm, or any value greater than or equal to 900 mm and less than or equal to 1100 mm.

[0042] In this embodiment, the width of the second reinforcing plate 22 is greater than or equal to 600 mm and less than or equal to 700 mm. With the above width, the contact area between the second reinforcing plate 22 and the concrete can be increased without affecting the connection strength between the second reinforcing plate 22 and the housing 10 due to the excessive width of the second reinforcing plate 22.

[0043] The width of the second reinforcing plate 22 may be 600 mm, 650 mm, 700 mm, or any value greater than or equal to 600 mm and less than or equal to 700 mm.

[0044] In this embodiment, the first reinforcing plate 21 and the second reinforcing plate 22 both extend in the radial direction of the housing 10 , and the width of the first reinforcing plate 21 and the width of the second reinforcing plate 22 refer to the dimensions in the radial direction of the housing 10 .

[0045] like Figure 1 As shown, the reinforcing plate includes a straight plate segment 23 and an arc-shaped plate segment 24 connected to each other, and the housing 10 includes a straight cylinder segment 11 and an arc-shaped cylinder segment 12 connected to each other, the inner side of the straight plate segment 23 is connected to the outer wall of the straight cylinder segment 11, and the inner side of the arc-shaped plate segment 24 is connected to the outer wall of the arc-shaped cylinder segment 12. The reinforcing plate with the above structure can reduce the acting force between the reinforcing plate and the housing 10 by matching the outer shapes of the straight plate segment 23 and the straight cylinder segment 11, and by matching the outer shapes of the arc-shaped plate segment 24 and the arc-shaped cylinder segment 12, which is beneficial to enhancing the strength of the volute.

[0046] It should be noted that the first reinforcing plate 21 and the second reinforcing plate 22 both include the above-mentioned straight plate segment 23 and arc-shaped plate segment 24 to match the shape of the housing 10 .

[0047] like Figure 1 As shown, there are multiple reinforcing holes, and the multiple reinforcing holes are arranged at intervals along the extension direction of the reinforcing plate. With the above arrangement, concrete can flow through the reinforcing plate through the multiple reinforcing holes, reduce the force of concrete on the reinforcing plate, and increase the contact area between the concrete and the reinforcing plate.

[0048] In this embodiment, there are multiple first reinforcement holes 211 and multiple second reinforcement holes 221 .

[0049] Specifically, the angle between two adjacent reinforcing plates is 90°. The above angle setting can make the arrangement of the reinforcing plates more reasonable and enhance the strength of the volute.

[0050] The angles between two adjacent first reinforcing plates 21 , between an adjacent first reinforcing plate 21 and a second reinforcing plate 22 , and between two adjacent second reinforcing plates 22 are all 90°.

[0051] Another embodiment of the present invention provides a water turbine, the water turbine includes the above-mentioned mixed flow turbine volute for reducing the deformation of the joint with concrete. During the pouring of concrete, the shell 10 is buried in the concrete, and the contact area between the shell 10 and the concrete can be increased by using a plurality of reinforcing plates to increase the limiting effect on the volute. At the same time, the reinforcing holes provided on the reinforcing plates can be used to allow concrete to flow through to avoid the generation of interaction force between the reinforcing plates and the shell 10 due to the squeezing effect of the concrete, thereby reducing the deformation of the volute during the operation of the water turbine through the reinforcing plates, and reducing the deformation of the joint between the volute and the concrete.

[0052] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, 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 the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method 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 exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the 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 devices or elements 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 contours of each component itself.

[0055] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0056] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A Francis turbine volute for reducing deformation of the joint with concrete, characterized in that: The turbine volute comprises: Housing (10); The reinforcing plate group (20) comprises a plurality of reinforcing plates, wherein the plurality of reinforcing plates are arranged at intervals along the circumference of the shell (10) on the outer periphery of the shell (10), the extending direction of the reinforcing plates is the same as the axial direction of the shell (10), and the reinforcing plates are provided with reinforcing holes.

2. The turbine volute according to claim 1, characterized in that: The reinforcing plate group (20) comprises a plurality of first reinforcing plates (21) and a plurality of second reinforcing plates (22); the first reinforcing plates (21) and the second reinforcing plates (22) have different sizes; the plurality of first reinforcing plates (21) are arranged on the outside of the plurality of second reinforcing plates (22); the plurality of first reinforcing plates (21) and the plurality of second reinforcing plates (22) are arranged at intervals along the circumference of the shell (10) on the outer periphery of the shell (10); the extension direction of the first reinforcing plates (21) and the extension direction of the second reinforcing plates (22) are both the same as the axial direction of the shell (10); and the reinforcing holes comprise a first reinforcing hole (211) arranged on the first reinforcing plate (21) and a second reinforcing hole (221) arranged on the second reinforcing plate (22).

3. The turbine volute according to claim 2, characterized in that: The first reinforcing plate (21) is a conical plate, and the inner diameter of the first reinforcing plate (21) gradually increases in a direction away from the shell (10); and / or, The second reinforcing plate (22) is a conical plate, and the inner diameter of the second reinforcing plate (22) gradually decreases in a direction away from the shell (10).

4. The turbine volute according to claim 2, characterized in that: The length dimension of the first reinforcing plate (21) is greater than the length dimension of the second reinforcing plate (22).

5. The turbine volute according to claim 2, characterized in that: The diameter of the first reinforcement hole (211) is greater than or equal to 450 mm and less than or equal to 550 mm; and / or, The diameter of the second reinforcement hole (221) is greater than or equal to 250 mm and less than or equal to 350 mm.

6. The turbine volute according to claim 2, characterized in that: The width of the first reinforcing plate (21) is greater than or equal to 900 mm and less than or equal to 1100 mm; and / or, The width of the second reinforcing plate (22) is greater than or equal to 600 mm and less than or equal to 700 mm.

7. The turbine volute according to claim 1, characterized in that: The reinforcing plate comprises a straight plate segment (23) and an arc-shaped plate segment (24) connected to each other, and the shell (10) comprises a straight cylinder segment (11) and an arc-shaped cylinder segment (12) connected to each other, the inner side of the straight plate segment (23) is connected to the outer wall of the straight cylinder segment (11), and the inner side of the arc-shaped plate segment (24) is connected to the outer wall of the arc-shaped cylinder segment (12).

8. The turbine volute according to claim 1, characterized in that: There are a plurality of reinforcement holes, and the plurality of reinforcement holes are arranged at intervals along the extending direction of the reinforcement plate.

9. The turbine volute according to claim 1, characterized in that: The angle between two adjacent reinforcing plates is 90°.

10. A water turbine, characterized in that: The water turbine comprises a Francis turbine volute for reducing deformation of a joint with concrete according to any one of claims 1 to 9.

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