Anti-fatigue water turbine volute structure

Abstract

The utility model provides an anti-fatigue water turbine volute structure which comprises a volute body made of steel materials, a wear-resisting layer is arranged on the inner side of the volute body, a buffer layer made of elastic materials is arranged between the wear-resisting layer and the volute body, a water inlet and a water outlet are formed in the volute body, the water inlet is communicated with a water suction pipe, and the water suction pipe is communicated with the water outlet. Water flow enters the volute body through the water suction pipe, impacts the wear-resistant layer and the buffer layer and then is discharged from the water outlet. Through the arrangement of the wear-resistant layer, the volute body can be prevented from making direct contact with water flow, and therefore the situation that the fatigue resistance is reduced due to the fact that the volute body is abraded and thinned is avoided; through the arrangement of the buffer layer, the impact force of water flow can be converted into elastic potential energy by the buffer layer, so that the damage to the volute body caused by the impact force of the water flow is reduced, and the impact resistance of the volute body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroelectric power generation equipment, in particular to an anti-fatigue turbine volute structure. Background Art

[0002] A pumped-storage power station, also known as a storage hydropower station, is a hydropower station that uses electricity from the grid during low load periods to pump water from the lower reservoir to the upper reservoir for energy storage, and then releases the water back to the lower reservoir to generate electricity when the grid is at peak load.

[0003] The turbine is a power conversion device in a pumped storage power station. It can convert the energy of water flow into rotational mechanical energy. In a hydropower station, water from the upstream reservoir is led to the turbine through a water diversion pipe, which drives the turbine runner to rotate and drives the generator to generate electricity. The water that has done work is discharged downstream through the tailwater pipe. The higher the water head and the greater the flow rate, the greater the output power of the turbine.

[0004] The turbine mainly includes a volute, a pump shaft, an impeller and a bearing. The impeller is arranged on the pump shaft. The integral rotation of the impeller and the pump shaft is arranged on the volute, and the pump shaft and the volute are rotatably connected through the bearing. The volute currently used is mainly a single-layer structure. When repeatedly impacted by water flow, the volute material gradually deteriorates, and fatigue cracks gradually occur, causing damage. Utility Model Content

[0005] The purpose of the utility model is to provide a fatigue-resistant turbine volute structure, which can effectively improve the fatigue resistance of the volute body by setting a wear-resistant layer and a buffer layer. In order to achieve the above technical features, the purpose of the utility model is achieved as follows:

[0006] A fatigue-resistant turbine volute structure comprises a volute body made of steel material, a wear-resistant layer is arranged on the inner side of the volute body, and a buffer layer made of elastic material is arranged between the wear-resistant layer and the volute body.

[0007] A plurality of reinforcement structures are arranged on the outer side of the volute body, and the reinforcement structure includes two horizontally arranged first reinforcement strips, and the two first reinforcement strips are connected by a second reinforcement strip.

[0008] The volute body is formed by detachably connecting a first half shell and a second half shell;

[0009] The wear-resistant layer comprises a first wear-resistant layer and a second wear-resistant layer butted against the first wear-resistant layer;

[0010] The buffer layer includes a first buffer layer and a second buffer layer butted against the first buffer layer;

[0011] The first wear-resistant layer and the first buffer layer are detachably installed in the first half shell, and the second wear-resistant layer and the second buffer layer are detachably installed in the second half shell.

[0012] A first steel plate is provided between the first half shell and the first buffer layer, and a second steel plate is provided between the second half shell and the second buffer layer;

[0013] A first integral structure composed of the first wear-resistant layer, the first buffer layer, and the first steel plate is installed on the inner side of the first half shell through fasteners; a second integral structure composed of the second wear-resistant layer, the second buffer layer, and the second steel plate is installed on the inner side of the second half shell through fasteners.

[0014] An annular groove is provided at the joint between the first half shell and the second half shell, a wear-resistant sheet is installed in the annular groove via a groove plate, and the first integral structure and the second integral structure are respectively located on both sides of the wear-resistant sheet.

[0015] A waterproof coating is provided between the wear-resistant sheet and the first half shell and the second half shell.

[0016] The volute structure of the utility model comprises a volute body made of steel material, a wear-resistant layer is arranged on the inner side of the volute body, and a buffer layer made of elastic material is arranged between the wear-resistant layer and the volute body. The wear-resistant layer can prevent the volute body from directly contacting with the water flow, thereby preventing the reduction of fatigue resistance due to the thinning of the thickness of the volute body due to wear. The buffer layer can convert the impact force of the water flow into elastic potential energy, thereby reducing the damage and destruction of the volute body by the impact force of the water flow, so as to improve the impact resistance of the volute body. Therefore, the wear-resistant layer and the buffer layer can effectively improve the fatigue resistance of the volute body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 A schematic diagram of a fatigue-resistant turbine volute structure provided by an embodiment of the utility model;

[0019] Figure 2 The embodiment of the utility model provides Figure 1 Middle B is a partial enlarged view;

[0020] Figure 3 The embodiment of the utility model provides Figure 2 Middle C is a partial enlarged view;

[0021] Figure 4A partial schematic diagram of a reinforcement structure provided by an embodiment of the utility model;

[0022] In the figure: volute body 1, first half shell 1a, second half shell 1b, wear-resistant layer 2, first wear-resistant layer 2a, second wear-resistant layer 2b, buffer layer 3, first buffer layer 3a, second buffer layer 3b, reinforcement structure 4, first reinforcement strip 4a, second reinforcement strip 4b, first steel plate 5a, second steel plate 5b, wear-resistant sheet 6, trough plate 7, suction pipe 8. DETAILED DESCRIPTION

[0023] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0024] See attached Figure 1-4 In order to realize the above technical features, the purpose of the utility model is achieved as follows:

[0025] A fatigue-resistant turbine volute structure includes a volute body 1 made of steel material, a wear-resistant layer 2 is provided on the inner side of the volute body 1, a buffer layer 3 made of elastic material is provided between the wear-resistant layer 2 and the volute body 1, a water inlet and a drain are provided on the volute body 1, and the water inlet is connected to a water suction pipe 8, and after the water flows into the volute body 1 through the water suction pipe 8, it impacts the wear-resistant layer 2 and the buffer layer 3 and then is discharged from the drain. By setting the wear-resistant layer 2, the volute body 1 can be prevented from directly contacting the water flow, thereby avoiding the reduction of fatigue resistance due to the thinning of the thickness of the volute body 1 due to wear; by setting the buffer layer 3, the buffer layer 3 can convert the impact force of the water flow into elastic potential energy, thereby reducing the damage and destruction of the impact force of the water flow to the volute body 1, so as to improve the impact resistance of the volute body 1; therefore, by setting the wear-resistant layer 2 and the buffer layer 3, the fatigue resistance of the volute body 1 can be effectively improved.

[0026] Furthermore, a plurality of reinforcing structures 4 are provided on the outer side of the volute body 1, and the reinforcing structure 4 includes two horizontally arranged first reinforcing strips 4a, and the two first reinforcing strips 4a are connected by a second reinforcing strip 4b. Through the arrangement of the above-mentioned reinforcing structures, the structural strength of the volute body 1 is enhanced and the fatigue strength is improved.

[0027] Furthermore, the volute body 1 is formed by a first half shell 1a and a second half shell 1b connected in a detachable manner; the wear-resistant layer 2 includes a first wear-resistant layer 2a and a second wear-resistant layer 2b connected to the first wear-resistant layer 2a; the buffer layer 3 includes a first buffer layer 3a and a second buffer layer 3b connected to the first buffer layer 3a; the first wear-resistant layer 2a and the first buffer layer 3a are detachably installed in the first half shell 1a, and the second wear-resistant layer 2b and the second buffer layer 3b are detachably installed in the second half shell 1b. The detachable design of the first buffer layer 3a, the second buffer layer 3b, the first wear-resistant layer 2a and the second wear-resistant layer 2b facilitates the replacement and maintenance of components.

[0028] Furthermore, a first steel plate 5a is provided between the first half shell 1a and the first buffer layer 3a, and a second steel plate 5b is provided between the second half shell 1b and the second buffer layer 3b; a first integral structure composed of the first wear-resistant layer 2a, the first buffer layer 3a and the first steel plate 5a is installed on the inner side of the first half shell 1a through fasteners; a second integral structure composed of the second wear-resistant layer 2b, the second buffer layer 3b and the second steel plate 5b is installed on the inner side of the second half shell 1b through fasteners. The arrangement of the above-mentioned first integral structure and the second integral structure facilitates modular installation and replacement, and at the same time enhances the stability of the installation structure.

[0029] Furthermore, an annular groove is provided at the joint of the first half shell 1a and the second half shell 1b, and a wear-resistant sheet 6 is installed in the annular groove through a groove plate 7, and the first integral structure and the second integral structure are respectively located on both sides of the wear-resistant sheet 6. The arrangement of the wear-resistant sheet 6 and the groove plate 7 improves the stability of the joint of the first half shell 1a and the second half shell 1b.

[0030] Furthermore, a waterproof coating is provided between the wear-resistant sheet 6 and the first half shell 1a and the second half shell 1b to achieve a sealing and leak-proof effect.

Claims

1. A fatigue-resistant turbine volute structure, characterized in that: It comprises a volute body (1) made of steel material, a wear-resistant layer (2) is provided on the inner side of the volute body (1), and a buffer layer (3) made of elastic material is provided between the wear-resistant layer (2) and the volute body (1).

2. The anti-fatigue turbine volute structure according to claim 1, characterized in that: A plurality of reinforcement structures (4) are provided on the outer side of the volute body (1), wherein the reinforcement structure (4) comprises two first reinforcement strips (4a) arranged horizontally, and the two first reinforcement strips (4a) are connected via a second reinforcement strip (4b).

3. The anti-fatigue turbine volute structure according to claim 1, characterized in that: The volute body (1) is formed by a first half shell (1a) and a second half shell (1b) being connected in a detachable manner; The wear-resistant layer (2) comprises a first wear-resistant layer (2a) and a second wear-resistant layer (2b) butted against the first wear-resistant layer (2a); The buffer layer (3) comprises a first buffer layer (3a) and a second buffer layer (3b) butted against the first buffer layer (3a); The first wear-resistant layer (2a) and the first buffer layer (3a) are detachably mounted in the first half shell (1a), and the second wear-resistant layer (2b) and the second buffer layer (3b) are detachably mounted in the second half shell (1b).

4. The anti-fatigue turbine volute structure according to claim 3, characterized in that: A first steel plate (5a) is provided between the first half shell (1a) and the first buffer layer (3a), and a second steel plate (5b) is provided between the second half shell (1b) and the second buffer layer (3b); A first integral structure composed of the first wear-resistant layer (2a), the first buffer layer (3a), and the first steel plate (5a) is installed on the inner side of the first half shell (1a) via fasteners; and a second integral structure composed of the second wear-resistant layer (2b), the second buffer layer (3b), and the second steel plate (5b) is installed on the inner side of the second half shell (1b) via fasteners.

5. The anti-fatigue turbine volute structure according to claim 4, characterized in that: An annular groove is provided at the joint between the first half shell (1a) and the second half shell (1b), a wear-resistant sheet (6) is installed in the annular groove via a groove plate (7), and the first integral structure and the second integral structure are respectively located on both sides of the wear-resistant sheet (6).

6. The anti-fatigue turbine volute structure according to claim 5, characterized in that: A waterproof coating is provided between the wear-resistant sheet (6) and the first half shell (1a) and the second half shell (1b).

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