Enhanced guide plate of tubular unit

Abstract

The utility model discloses a through-flow unit enhanced guide plate which is arranged between a shell and a rotating wheel of a through-flow generator, the guide plate comprises a connecting plate, the upper end of the connecting plate is connected with an upper bottom plate, the lower end of the connecting plate is connected with a lower bottom plate, and the upper bottom plate and the lower bottom plate are arc-shaped plates; the connecting plate comprises a base plate, a plurality of fin plates are arranged on the two sides of the base plate, and acute angles are formed between the fin plates and the base plate. According to the flow guide plate, the combined design is adopted, the connecting plate comprises the straight base plate, the fin plates are arranged on the two sides of the base plate, and the fin plates are connected with the base plate in a welded mode, so that the rigidity and strength of the base plate are enhanced, and the deformation resistance of the flow guide plate is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of hydropower equipment parts, in particular to an enhanced guide plate of a tubular unit. Background Art

[0002] The tubular unit is a common type of hydroelectric generator unit. The turbine is installed in a metal shell. A guide plate is arranged between the turbine and the shell to guide the incoming water. The existing guide plates are made of metal plates of a certain thickness. The overall strength is insufficient. They may fall off or break under hydraulic impact during long-term operation. Once the guide plates fall off, the guide vanes will be stuck and cannot be closed, and the unit cannot be shut down. In severe cases, the unit may run away. It may also cause the blades to break, destroying the balance of the unit, causing abnormal curve rotation of the unit, and causing damage to the unit's bearing system (combination, water guide, and oil receiver floating bearing). At the same time, the guide plates are stuck between the blades, causing rapid scraping of the runner chamber, resulting in increased vibration of the unit.

[0003] Due to the serious consequences that may result from the guide plate falling off due to insufficient force, in order to improve the safety and reliability of the unit, it is necessary to redesign a guide plate for the cross-flow unit to ensure the reliable operation of the hydropower unit. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model proposes an enhanced guide plate for a tubular unit, which adopts the following technical solutions:

[0005] A reinforced guide plate for a flow-through unit comprises a guide plate, wherein the guide plate is arranged between the casing and the impeller of the flow-through generator, wherein the guide plate comprises a connecting plate, wherein the upper end of the connecting plate is connected to an upper base plate, and the lower end is connected to a lower base plate, wherein the upper base plate and the lower base plate are arc-shaped plates; wherein the connecting plate comprises a base plate, wherein a plurality of fin plates are arranged on both sides of the base plate, and the fin plates are arranged at an acute angle to the base plate.

[0006] Furthermore, the cross-flow generator has an upstream end and a downstream end, and the fin plate is inclined toward the downstream end.

[0007] Furthermore, the fin plates are arranged at equal intervals from the upstream end to the downstream end.

[0008] Furthermore, the fin plates are symmetrically or asymmetrically arranged along two sides of the base plate.

[0009] Furthermore, the multiple fins extend outward from the base plate at equal distances.

[0010] Furthermore, the distances that the multiple fins extend outward from the base plate increase sequentially from the upstream end to the downstream end.

[0011] Furthermore, the fin plate is connected to the base plate by welding, and the thickness of the fin plate is less than or equal to the thickness of the base plate.

[0012] Furthermore, the curvature of the upper bottom plate is matched with the inner wall of the shell, the curvature of the lower bottom plate is matched with the outer side of the rotating wheel, and the curvature of the upper bottom plate is greater than that of the lower bottom plate.

[0013] Furthermore, bolt holes are provided on the upper base plate and the lower base plate.

[0014] Furthermore, the upper bottom plate and the lower bottom plate each have a row of bolt holes on both sides of the base plate near the upstream end, and the upper bottom plate and the lower bottom plate each have two rows of bolt holes on both sides of the base plate near the downstream end.

[0015] The beneficial effects of the utility model are as follows: the guide plate of the utility model adopts a combined design, an upper bottom plate and a lower bottom plate connected to the outer shell and the impeller are arranged at both ends of the connecting plate, and multiple rows of bolt holes are arranged on the upper bottom plate and the lower bottom plate to enhance the firmness of the guide plate fixation; at the same time, the connecting plate includes a flat base plate, and a plurality of fin plates are arranged on both sides of the base plate, and the fin plates are connected to the base plate by welding, thereby enhancing the rigidity and strength of the guide plate, wherein the fin plates are arranged at an acute angle to the downstream end, which can reduce the increased resistance of the water flow acting on the connecting plate due to the addition of the fin plates.

[0016] Other beneficial effects of the present invention are described in the embodiments of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 A schematic diagram showing the working state of the guide plate of the utility model;

[0019] Figure 2 A schematic diagram showing the overall structure of the guide plate of the utility model;

[0020] Figure 3 A front view showing the overall structure of the guide plate of the utility model;

[0021] Figure 4 express Figure 3 Section view at A Figure 1 ;

[0022] Figure 5 express Figure 4 The enlarged schematic diagram of point B in the middle;

[0023] Figure 6 express Figure 3 Section view at A Figure 2 .

[0024] Explanation of reference numerals: 100 - flow-through generator; 10 - casing; 20 - rotor; 30 - guide plate; 31 - upper base plate; 32 - connecting plate; 321 - base plate; 322 - fin plate; 33 - lower base plate; 34 - upstream end; 35 - downstream end; 36 - bolt hole. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all the connection relationships mentioned in the text do not simply refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation; the embodiments and features and technical solutions in the embodiments of the utility model can be combined with each other without conflict. In addition, the terms "first", "second", "upper end", "lower end", "inner end", "outer end", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0027] A reinforced guide plate for a tubular unit, referring to Figure 1-Figure 6 As shown, it includes a guide plate 30, which is arranged between the casing 10 and the impeller 20 of the cross-flow generator 100, and the guide plate 30 includes a connecting plate 32, the upper end of the connecting plate 32 is connected to an upper bottom plate 31, and the lower end is connected to a lower bottom plate 33, and the upper bottom plate 31 and the lower bottom plate 33 are arc-shaped plates; wherein, the connecting plate 32 includes a base plate 321, and a plurality of fin plates 322 are arranged on both sides of the base plate 321, and the fin plates 322 are arranged at an acute angle with the base plate 321.

[0028] Furthermore, the cross-flow generator 100 has an upstream end 34 and a downstream end 35 , and the fin plate 322 is inclined toward the downstream end 35 , which can reduce the resistance of the guide plate 30 to the water flow due to the addition of the fin plate.

[0029] Furthermore, the fin plates 322 are arranged at equal intervals from the upstream end 34 to the downstream end 35 .

[0030] Furthermore, the fins 322 are symmetrically or asymmetrically arranged along both sides of the base plate 321. The non-stacked arrangement means that the fins 322 are not arranged on the other side of the fins 322 arranged on one side of the base plate 321, but are staggered by a distance of at least the thickness of the fins 322.

[0031] Furthermore, the multiple fins 322 extend outward from the base plate 321 at equal distances, which can facilitate manufacturing.

[0032] Furthermore, as the water flows from the upstream to the downstream of the connecting plate 32, turbulence occurs at the tail of the connecting plate 32, increasing the vibration of the downstream of the connecting plate 32. Therefore, the distances of the plurality of fins 322 extending outward from the base plate 321 are set to increase in sequence from the upstream end 34 to the downstream end 35, such as Figure 6 As shown, the line connecting the distances of the fin plates 322 protruding from the base plate 321 is an oblique line, which can further enhance the anti-deformation capability of the connecting plate 32 at the downstream end 35 .

[0033] Furthermore, the fin plate 322 is connected to the base plate 321 by welding, and the thickness of the fin plate 322 is less than or equal to the thickness of the base plate 321, which can ensure strength while avoiding excessive weight of the guide plate.

[0034] Furthermore, the curvature of the upper bottom plate 31 matches the inner wall of the housing 10 , the curvature of the lower bottom plate 33 matches the outer side of the rotating wheel 20 , and the curvature of the upper bottom plate 31 is greater than that of the lower bottom plate 33 .

[0035] Furthermore, bolt holes 36 are provided on the upper base plate 31 and the lower base plate 33 , and the guide plate 30 is fixed to the housing 10 and the impeller 20 by bolts.

[0036] Furthermore, the upper base plate 31 and the lower base plate 33 each have a row of bolt holes 36 on both sides of the base plate 321 near the upstream end 34, and the upper base plate 31 and the lower base plate 33 each have two rows of bolt holes 36 on both sides of the base plate 321 near the downstream end 35, which can enhance the firmness of the downstream end 35.

[0037] The guide plate 30 of the utility model adopts a modular design, and an upper bottom plate 31 and a lower bottom plate 33 connected to the housing 10 and the impeller 20 are arranged at both ends of the connecting plate 32, and multiple rows of bolt holes 36 are arranged on the upper bottom plate 31 and the lower bottom plate 33 to enhance the firmness of the guide plate 30; at the same time, the connecting plate 32 includes a flat base plate 321, and a plurality of fin plates 322 are arranged on both sides of the base plate 321, and the fin plates 322 are connected to the base plate 321 by welding, thereby enhancing the rigidity and strength of the base plate 321, wherein the fin plates 322 are arranged at an acute angle to the downstream end 35, which can reduce the increased resistance of the water flow acting on the connecting plate 32 due to the addition of the fin plates 322.

[0038] It should be noted that the above embodiments are intended to illustrate the technical solution of the utility model, and are exemplary methods of the claims of the utility model, rather than limitations on the claims. Although the above embodiments describe the utility model in detail, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A reinforced guide plate for a tubular generator set, the guide plate (30) being arranged between a housing (10) and a runner (20) of a tubular generator (100), characterized in that: The guide plate (30) comprises a connecting plate (32), the upper end of the connecting plate (32) is connected to an upper bottom plate (31), and the lower end is connected to a lower bottom plate (33), and the upper bottom plate (31) and the lower bottom plate (33) are arc-shaped plates; The connecting plate (32) comprises a base plate (321), a plurality of fin plates (322) are arranged on both sides of the base plate (321), and the fin plates (322) are arranged at an acute angle to the base plate (321).

2. The enhanced guide plate of a tubular unit according to claim 1, characterized in that: The crossflow generator (100) has an upstream end (34) and a downstream end (35), and the fin plate (322) is inclined toward the downstream end (35).

3. The enhanced guide plate of a tubular unit according to claim 2, characterized in that: The fin plates (322) are arranged at equal intervals from the upstream end (34) to the downstream end (35).

4. The enhanced guide plate of a tubular unit according to claim 3, characterized in that: The fin plates (322) are symmetrically or asymmetrically arranged along two sides of the base plate (321).

5. The enhanced guide plate of a tubular unit according to claim 4, characterized in that: The multiple fin plates (322) extend outward from the base plate (321) at equal distances.

6. The enhanced guide plate of a tubular unit according to claim 4, characterized in that: The distances that the multiple fin plates (322) extend outward from the base plate (321) increase sequentially from the upstream end (34) to the downstream end (35).

7. The enhanced guide plate of a tubular unit according to claim 4 or 5, characterized in that: The fin plate (322) is connected to the base plate (321) by welding, and the thickness of the fin plate (322) is less than or equal to the thickness of the base plate (321).

8. The enhanced guide plate of a tubular unit according to claim 7, characterized in that: The curvature of the upper bottom plate (31) matches the inner wall of the outer shell (10), the curvature of the lower bottom plate (33) matches the outer side of the rotating wheel (20), and the curvature of the upper bottom plate (31) is greater than that of the lower bottom plate (33).

9. The enhanced guide plate of a tubular unit according to claim 8, characterized in that: Bolt holes (36) are provided on the upper base plate (31) and the lower base plate (33).

10. The enhanced guide plate of a tubular unit according to claim 9, characterized in that: The upper bottom plate (31) and the lower bottom plate (33) each have a row of bolt holes (36) on both sides of the base plate (321) close to the upstream end (34), and the upper bottom plate (31) and the lower bottom plate (33) each have two rows of bolt holes (36) on both sides of the base plate (321) close to the downstream end (35).

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