Energy capture type water bucket structure for water turbine

Abstract

The utility model discloses an energy capture type water bucket structure for a water turbine. A first reference pyramid and a second reference pyramid are arranged at the bottom of a water bucket body of the structure; the initial spacing angle between the first reference pyramid and the second reference pyramid is alpha; a plurality of first reference extending pyramids are distributed on the left side of the first reference pyramids, and the interval angle between every two adjacent first reference extending pyramids is decreased progressively according to a first arithmetic progression by an initial interval angle alpha; a plurality of second reference extension pyramids are distributed on the right sides of the second reference pyramids, and the interval angle between every two adjacent second reference extension pyramids is gradually decreased according to a second arithmetic progression by an initial interval angle alpha; the side length of the first reference extension pyramid is kept unchanged, and the side length of the second reference extension pyramid is decreased progressively according to a third arithmetic progression. According to the utility model, the purposes of reducing the speed of water flow and capturing energy can be achieved to the greatest extent.

Description

Technical Field

[0001] The utility model belongs to the technical field of water turbines, and particularly relates to an energy capture type bucket structure for a water turbine. Background Technique

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the turbomachinery in fluid machinery. Most water turbines are installed in hydropower stations to drive generators to generate electricity. In a hydropower station, the water in the upstream reservoir is led to the water turbine through a water inlet pipe, pushing the runner of the water turbine to rotate and driving the generator to generate electricity. The water that has done work is then discharged downstream through the tail water pipe. The higher the water head and the larger the flow rate, the greater the output power of the water turbine.

[0003] During the operation of the water turbine, it is necessary to start with the help of buckets. On the premise that the buckets have a certain water storage capacity, it is also necessary to be able to overcome the starting torques of components such as generators, gears, and chains. In traditional technologies, the water storage capacity of the buckets of the water turbine is small, the effect of intercepting and guiding the water flow is poor, and the water energy capture amount is low. Although it can also overcome the starting torques of components such as generators, gears, and chains, the starting efficiency is low and the water energy utilization effect is poor. How to achieve efficient energy capture of the water turbine buckets has practical application significance. Content of the Utility Model

[0004] Therefore, the utility model provides an energy capture type bucket structure for a water turbine to solve the problems of less water storage capacity of traditional buckets, poor effect of intercepting and guiding water flow, and low energy capture efficiency.

[0005] To achieve the above object, the utility model provides the following technical solution: an energy capture type bucket structure for a water turbine, including a bucket body, a first guide cover is connected to the far water end side of the upper part of the bucket body, and a second guide cover is connected to the water inlet end side of the upper part of the bucket body;

[0006] A first reference pyramid and a second reference pyramid are provided at the bottom of the bucket body; the initial spacing angle between the first reference pyramid and the second reference pyramid is α;

[0007] A number of first reference extended pyramids are distributed on the left side of the first reference pyramid, and the spacing angle between adjacent two first reference extended pyramids decreases in accordance with the first arithmetic progression with the initial spacing angle α;

[0008] A number of second reference extended pyramids are distributed on the right side of the second reference pyramid, and the spacing angle between adjacent two second reference extended pyramids decreases in accordance with the second arithmetic progression with the initial spacing angle α;

[0009] The side length of the first reference extended pyramid remains unchanged, and the side length of the second reference extended pyramid decreases according to a third arithmetic progression.

[0010] As a preferred solution for the energy capture bucket structure for a water turbine, the first fairing bends towards the center side of the bucket body. The first fairing includes a first transition section, a first center section, and a first outlet section; the first transition section, the first center section, and the first outlet section are connected in sequence to form the first fairing.

[0011] As a preferred solution for the energy capture bucket structure for a water turbine, the second fairing bends towards the center side of the bucket body. The second fairing includes a second transition section, a second center section, and a second outlet section; the second transition section, the second center section, and the second outlet section are connected in sequence to form the second fairing.

[0012] As a preferred solution for the energy capture bucket structure for a water turbine, the central angle corresponding to the first center section is equal to the central angle corresponding to the second center section.

[0013] As a preferred solution for the energy capture bucket structure for a water turbine, the initial spacing angle α is 23°.

[0014] As a preferred solution for the energy capture bucket structure for a water turbine, the central angles of the first center section and the second center section are both 180°;

[0015] The radius of the first center section is greater than the radius of the second center section; the length of the first transition section is greater than the length of the second transition section;

[0016] The length of the first outlet section is greater than the length of the second outlet section.

[0017] As a preferred solution for the energy capture bucket structure for a water turbine, the spacing angle between two adjacent first reference extended pyramids decreases according to a tolerance of 3°.

[0018] As a preferred solution for the energy capture bucket structure for a water turbine, the spacing angle between two adjacent second reference extended pyramids decreases according to a tolerance of 3°.

[0019] As a preferred solution for the energy capture bucket structure for a water turbine, the side length of the second reference extended pyramid decreases to 2 mm according to a tolerance of 0.5 mm.

[0020] The present utility model further provides a processing method for an energy-capturing water bucket for a water turbine, which is used for the energy-capturing water bucket structure for a water turbine as described above. The water bucket body, the first guide cover, the second guide cover, the first reference pyramid, the second reference pyramid, the first reference extended pyramid, and the second reference extended pyramid are modeled according to set parameters.

[0021] The modeled water bucket body, the first guide cover, the second guide cover, the first reference pyramid, the second reference pyramid, the first reference extended pyramid, and the second reference extended pyramid are obtained by 3D printing.

[0022] The beneficial effects of the present utility model are as follows. It includes a water bucket body. A first guide cover is connected to the far-water end side of the upper part of the water bucket body, and a second guide cover is connected to the water inlet end side of the upper part of the water bucket body. A first reference pyramid and a second reference pyramid are provided at the bottom of the water bucket body. The initial spacing angle between the first reference pyramid and the second reference pyramid is α. A number of first reference extended pyramids are distributed on the left side of the first reference pyramid, and the spacing angle between two adjacent first reference extended pyramids decreases according to the first arithmetic progression with the initial spacing angle α. A number of second reference extended pyramids are distributed on the right side of the second reference pyramid, and the spacing angle between two adjacent second reference extended pyramids decreases according to the second arithmetic progression with the initial spacing angle α. The side length of the first reference extended pyramid remains unchanged, and the side length of the second reference extended pyramid decreases according to the third arithmetic progression. The present utility model can efficiently intercept and guide water flow, absorb and store water energy, greatly increase the water storage capacity and the water energy capture amount, and can achieve the goals of reducing the water flow speed and capturing energy to the greatest extent. Description of the Drawings

[0023] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0024] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present utility model without affecting the effects that the present utility model can produce and the purposes that can be achieved.

[0025] Figure 1Schematic three-dimensional view of the energy capture bucket structure for a water turbine provided by an embodiment of the present utility model;

[0026] Figure 2 Schematic cross-sectional view of the energy capture bucket structure for a water turbine provided by an embodiment of the present utility model;

[0027] Figure 3 Schematic diagram of the dimensional relationship of the energy capture bucket structure for a water turbine provided by an embodiment of the present utility model.

[0028] In the figure, 1 is the bucket body; 2 is the first guide cover; 3 is the second guide cover; 4 is the first reference pyramid; 5 is the second reference pyramid; 6 is the first reference extended pyramid; 7 is the second reference extended pyramid; 8 is the first transition section; 9 is the first central section; 10 is the first outlet section; 11 is the second transition section; 12 is the second central section; 13 is the second outlet section. Detailed implementation manners

[0029] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Refer to Figure 1 、 Figure 2 and Figure 3 An energy capture bucket structure for a water turbine provided by an embodiment of the present utility model includes a bucket body 1. A first guide cover 2 is connected to the far-water end side of the upper part of the bucket body 1, and a second guide cover 3 is connected to the water inlet end side of the upper part of the bucket body 1;

[0031] Among them, a first reference pyramid 4 and a second reference pyramid 5 are provided at the bottom of the bucket body 1; the initial spacing angle between the first reference pyramid 4 and the second reference pyramid 5 is α;

[0032] Among them, several first reference extended pyramids 6 are distributed on the left side of the first reference pyramid 4, and the spacing angle between adjacent two first reference extended pyramids 6 decreases according to the first arithmetic sequence with the initial spacing angle α;

[0033] Among them, several second reference extended pyramids 7 are distributed on the right side of the second reference pyramid 5, and the spacing angle between adjacent two second reference extended pyramids 7 decreases according to the second arithmetic sequence with the initial spacing angle α;

[0034] Among them, the side length of the first reference extension pyramid 6 remains unchanged, and the side length of the second reference extension pyramid 7 decreases according to the third arithmetic progression.

[0035] In this embodiment, the first fairing 2 bends towards the center side of the water bucket body 1. The first fairing 2 includes a first transition section 8, a first central section 9, and a first outlet section 10. The first transition section 8, the first central section 9, and the first outlet section 10 are sequentially connected to form the first fairing 2. The second fairing 3 bends towards the center side of the water bucket body 1. The second fairing 3 includes a second transition section 11, a second central section 12, and a second outlet section 13. The second transition section 11, the second central section 12, and the second outlet section 13 are sequentially connected to form the second fairing 3. The central angle corresponding to the first central section 9 is equal to the central angle corresponding to the second central section 12. The central angles of the first central section 9 and the second central section 12 are both 180°. The radius of the first central section 9 is greater than the radius of the second central section 12. The length of the first transition section 8 is greater than the length of the second transition section 11. The length of the first outlet section 10 is greater than the length of the second outlet section 13.

[0036] Specifically, the first fairing 2 is at the far water end and is at a lower position compared to the second fairing 3. The first transition section 8 of the first fairing 2 is integrally and transitionally connected to the water bucket body 1. The first transition section 8 is designed in a circular arc shape, and the radius of the first transition section 8 is 72 mm. The first central section 9 is integrally and transitionally connected to the first transition section 8. The first central section 9 is designed in a circular arc shape, and the radius of the first central section 9 is 40 mm. The first outlet section 10 is integrally and transitionally connected to the first central section 9. The first outlet section 10 is linear, and the length of the first outlet section 10 is 20 mm.

[0037] Among them, the second fairing 3 is at the near water end and is at a higher position compared to the second fairing 3. The second transition section 11 of the second fairing 3 is integrally and transitionally connected to the water bucket body 1. The second transition section 11 is designed in a straight line, and the length of the second transition section 11 is 20 mm. The second central section 12 is integrally and transitionally connected to the second transition section 11. The second central section 12 is designed in a circular arc shape, and the radius of the second central section 12 is 20 mm. The second outlet section 13 is integrally and transitionally connected to the second central section 12. The second outlet section 13 is linear, and the length of the second outlet section 13 is 10 mm.

[0038] See Figure 3 , in this embodiment, the initial spacing angle α between the first reference pyramid 4 and the second reference pyramid 5 is 23°. The spacing angle between two adjacent first reference extension pyramids 6 decreases according to a tolerance of 3°. That is, the formula for the first arithmetic progression is α = 23 - 3a; where: α is the spacing angle, and a is the number of gradual changes (i.e., the number of terms of the first arithmetic progression).

[0039] Among them, the spacing angle between two adjacent second reference extended pyramids 7 decreases by a tolerance of 3°. That is, the formula for the second arithmetic sequence is α = 23 - 3a; where: α is the spacing angle, and a is the number of gradually changing quantities (i.e., the number of terms in the second arithmetic sequence).

[0040] Among them, the side length of the second reference extended pyramid 7 decreases to 2 mm according to a tolerance of 0.5 mm. That is, the formula for the third arithmetic sequence is D = 5 - 0.5c, where D is the side length of the second reference extended pyramid 7, and c is the number of gradually changing quantities (i.e., the number of terms in the third arithmetic sequence).

[0041] In a possible embodiment, the side length of the first reference extended pyramid 6 can also be gradually changed in the manner of an arithmetic sequence.

[0042] In a possible embodiment, the initial terms and tolerances of the first arithmetic sequence, the second arithmetic sequence, and the third arithmetic sequence can be flexibly changed as needed. Thus, the overall adopts a combination of "spacing + dimension" double gradual change, that is, inside the bucket body 1, the sizes and spacings of the pyramids are both set in a gradually changing pattern, aiming to fully combine the advantages of large-sized and small-sized pyramids and the advantages of wide-spacing and narrow-spacing pyramids, and can achieve the goal of reducing the water flow speed and capturing energy to the greatest extent.

[0043] In the embodiment of the present utility model, there is also provided a processing method for an energy capture type bucket for a water turbine, which is used for an energy capture type bucket structure of a water turbine in the above embodiment. The bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7 are modeled according to set parameters; the modeled bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7 are 3D printed to obtain.

[0044] Among them, the set parameters follow the designs of the first arithmetic sequence, the second arithmetic sequence, and the third arithmetic sequence in the above embodiment, that is, they conform to α = 23 - 3a and D = 5 - 0.5c. After modeling the bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7 according to the set parameters in three-dimensional drawing software, they are 3D printed and formed. There are related technologies in the 3D printing technology itself, which will not be elaborated here.

[0045] In a possible embodiment, it is also possible to manufacture molds for the bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7, and then use a stamping process to machine the energy capture type buckets for water turbines.

[0046] In summary, the utility model includes a bucket body 1. The upper far-water end side of the bucket body 1 is connected to the first guide cover 2, and the upper water inlet end side of the bucket body 1 is connected to the second guide cover 3. The bottom of the bucket body 1 is provided with a first reference pyramid 4 and a second reference pyramid 5. The initial spacing angle between the first reference pyramid 4 and the second reference pyramid 5 is α. A number of first reference extended pyramids 6 are distributed on the left side of the first reference pyramid 4, and the spacing angle between two adjacent first reference extended pyramids 6 decreases in accordance with the first arithmetic progression with the initial spacing angle α. A number of second reference extended pyramids 7 are distributed on the right side of the second reference pyramid 5, and the spacing angle between two adjacent second reference extended pyramids 7 decreases in accordance with the second arithmetic progression with the initial spacing angle α. The side length of the first reference extended pyramid 6 remains unchanged, and the side length of the second reference extended pyramid 7 decreases in accordance with the third arithmetic progression. By modeling the bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7 according to the set parameters; the modeled bucket body 1, the first guide cover 2, the second guide cover 3, the first reference pyramid 4, the second reference pyramid 5, the first reference extended pyramid 6, and the second reference extended pyramid 7 are obtained by 3D printing. The utility model can efficiently intercept and guide water flow, absorb and store water energy, greatly increase the water storage capacity and the water energy capture amount; and can achieve the goals of reducing the water flow speed and capturing energy to the greatest extent.

[0047] Although the utility model has been described in detail with general descriptions and specific embodiments above, based on the utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the utility model fall within the scope of protection required by the utility model.

Claims

1. An energy capture type bucket structure for a water turbine, characterized in that, It includes a water bucket body (1), and a first deflector (2) is connected to the far-water end side of the upper part of the water bucket body (1), and a second deflector (3) is connected to the water inlet end side of the upper part of the water bucket body (1); A first reference pyramid (4) and a second reference pyramid (5) are provided at the bottom of the water bucket body (1); the initial spacing angle between the first reference pyramid (4) and the second reference pyramid (5) is α; A number of first reference extended pyramids (6) are distributed on the left side of the first reference pyramid (4), and the spacing angle between two adjacent first reference extended pyramids (6) decreases according to a first arithmetic progression with the initial spacing angle α; A number of second reference extended pyramids (7) are distributed on the right side of the second reference pyramid (5), and the spacing angle between two adjacent second reference extended pyramids (7) decreases according to a second arithmetic progression with the initial spacing angle α; The side length of the first reference extended pyramid (6) remains unchanged, and the side length of the second reference extended pyramid (7) decreases according to a third arithmetic progression.

2. The energy capture type bucket structure for a water turbine according to claim 1, wherein, The first deflector (2) bends towards the center side of the water bucket body (1), and the first deflector (2) includes a first transition section (8), a first center section (9) and a first outlet section (10); the first transition section (8), the first center section (9) and the first outlet section (10) are connected in sequence to form the first deflector (2).

3. The energy capture type bucket structure for a water turbine according to claim 2, wherein, The second deflector (3) bends towards the center side of the water bucket body (1), and the second deflector (3) includes a second transition section (11), a second center section (12) and a second outlet section (13); the second transition section (11), the second center section (12) and the second outlet section (13) are connected in sequence to form the second deflector (3).

4. The energy capture type bucket structure for a water turbine according to claim 3, characterized in that, The central angle corresponding to the first center section (9) is equal to the central angle corresponding to the second center section (12).

5. The energy capture type bucket structure for a water turbine according to claim 4, characterized in that, The initial spacing angle α is 23°.

6. The energy capture type bucket structure for a water turbine according to claim 4, characterized in that, The central angles of the first center section (9) and the second center section (12) are both 180°; The radius of the first center section (9) is greater than the radius of the second center section (12); the length of the first transition section (8) is greater than the length of the second transition section (11); The length of the first outlet section (10) is greater than the length of the second outlet section (13).

7. The energy capture type bucket structure for a water turbine according to claim 5, wherein, The spacing angle between two adjacent first reference extended pyramids (6) decreases according to a tolerance of 3°.

8. The energy capture type bucket structure for a water turbine according to claim 5, characterized in that, The spacing angle between two adjacent second reference extended pyramids (7) decreases according to a tolerance of 3°.

9. The energy capture type bucket structure for a water turbine according to claim 5, characterized in that, The side length of the second reference extended pyramid (7) decreases to 2 mm according to a tolerance of 0.5 mm.

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