Steel volute for pumped storage power station

Abstract

The utility model discloses a steel volute for a pumped storage power station, which comprises a steel volute shell provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively communicated with a water inlet pipeline and a water outlet pipeline; wherein each of the water inlet pipeline and the water outlet pipeline comprises an annular outer layer, an annular piezoelectric material layer and an annular inner layer, the annular outer layers and the annular inner layers have flexibility, the annular inner layers are arranged in the annular outer layers, the annular piezoelectric material layers are arranged between the annular outer layers and the annular inner layers, and the annular piezoelectric material layers are arranged between the annular outer layers and the annular inner layers. The annular outer layer is connected with the annular inner layer, the annular piezoelectric material layer is used for being externally connected with a power source, and the steel volute can improve the adaptability of a water turbine under different water flow conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine technical field, especially a steel volute for pumped storage power station. BACKGROUND

[0002] Pumped storage power station is also called energy storage type hydropower station, that is, using the power of low load valley in power grid, pumping water from lower reservoir to upper reservoir, when the peak load of power grid, water is discharged to lower reservoir to generate electricity.

[0003] Water turbine is the power conversion equipment of pumped storage power station, which can convert the energy of water flow into rotary mechanical energy, in hydropower station, the water in upstream reservoir is guided to water turbine through water diversion pipe, which drives the runner of water turbine to rotate and drives the generator to generate electricity. The water after work is discharged to downstream through tail water pipe.

[0004] Volute is one of the main components of water turbine. The volute in prior art mainly includes volute main body and water inlet channel and water outlet channel communicated with the volute main body, the water inlet channel and the water outlet channel are both fixed caliber. The fixed size of water inlet channel and water outlet channel limits the adaptability of water turbine under different working conditions. In actual operation, the flow and pressure of water flow will fluctuate with the change of external conditions, and the fixed size of flow channel cannot be adjusted accordingly according to these changes. For example, when the flow of water flow increases, the fixed size of water inlet channel may not meet the demand of rapid inflow of water, which leads to congestion of water flow at the inlet, increases the resistance and energy loss of water flow, and further reduces the efficiency of water turbine. Similarly, when the flow of water flow decreases, the water outlet channel may be relatively large, which reduces the flow rate of water flow at the outlet and affects the overall performance output of water turbine. SUMMARY

[0005] The utility model provides a kind of steel volute for pumped storage power station, to solve the problem of the adaptability of water turbine limited by the fixed size of water inlet channel and water outlet channel and the influence of overall performance output.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] A kind of steel volute for pumped storage power station, including the steel volute shell with water inlet and water outlet, the water inlet and the water outlet are respectively communicated with water inlet pipe and water outlet pipe;

[0008] The water inlet pipeline and the water outlet pipeline each comprise a concentric and coaxial annular outer layer, an annular piezoelectric material layer and an annular inner layer arranged in sequence, the annular outer layer and the annular inner layer each have flexibility, the annular inner layer is arranged inside the annular outer layer, the annular piezoelectric material layer is clamped and fixed between the annular outer layer and the annular inner layer, and the annular piezoelectric material layer is electrically connected with an external power supply.

[0009] Preferably, the material of the annular piezoelectric material layer is piezoelectric ceramic or piezoelectric polymer.

[0010] Preferably, the water inlet pipeline is detachably arranged at the water inlet.

[0011] More preferably, the material of the annular inner layer is fiber reinforced plastic.

[0012] More preferably, the material of the annular outer layer is metal matrix composite material.

[0013] Preferably, the inside of the steel volute shell is rotatably provided with a turbine.

[0014] The turbine and the steel volute shell are connected through a pump shaft.

[0015] More preferably, one end of the pump shaft penetrates out of the outside of the steel volute shell and is covered with a protective shell.

[0016] The rotating connection position of the pump shaft and the steel volute shell is provided with a bearing.

[0017] Further, the protective shell and the steel volute shell are detachably connected through a bolt set.

[0018] The beneficial effects of the utility model are as follows:

[0019] In actual use, when the diameters of the water inlet pipeline and the water outlet pipeline need to be adjusted to adapt to the increase or decrease of water flow, the voltage applied to the annular piezoelectric material layer can be controlled to achieve the adjustment. After a specific voltage is applied, the annular piezoelectric material layer will expand or contract. Since the annular outer layer and the annular inner layer both have flexibility, they will expand or contract synchronously under the driving of the annular piezoelectric material layer, thereby realizing the diameter adjustment of the water inlet pipeline and the water outlet pipeline. Such a design can improve the adaptability of the water turbine under different water flow conditions, thereby improving the overall performance of the water turbine. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a half sectional view of a steel volute shell for pumped storage power station;

[0021] Figure 2 It is Figure 1A local enlarged view of the middle A;

[0022] In the figure: 100, steel volute shell; 200, turbine; 300, protective shell; 400, pump shaft; 500, water inlet pipe; 501, annular outer layer; 502, annular piezoelectric material layer; 503, annular inner layer; 600, water outlet pipe. DETAILED DESCRIPTION

[0023] The embodiments are further described below with reference to the accompanying drawings.

[0024] Please refer to Figure 1 and Figure 2 The steel volute shell for pumped storage power station provided by the embodiments of the present application comprises a steel volute shell 100 provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with a water inlet pipe 500 and a water outlet pipe 600; wherein the water inlet pipe 500 and the water outlet pipe 600 both comprise an annular outer layer 501, an annular piezoelectric material layer 502 and an annular inner layer 503, the annular outer layer 501 and the annular inner layer 503 both have flexibility, the annular inner layer 503 is arranged inside the annular outer layer 501, the annular piezoelectric material layer 502 is arranged between the annular outer layer 501 and the annular inner layer 503 and connects the annular outer layer 501 and the annular inner layer 503, and the annular piezoelectric material layer 502 is used for external connection of a power supply.

[0025] In actual use, when it is necessary to adjust the caliber of the water inlet pipe 500 and the water outlet pipe 600 to adapt to the increase or decrease of water flow, the voltage applied to the annular piezoelectric material layer 502 can be controlled to achieve the adjustment. After a specific voltage is applied, the annular piezoelectric material layer 502 will expand or contract. Since the annular outer layer 501 and the annular inner layer 503 both have flexibility, they will expand or contract synchronously under the driving of the annular piezoelectric material layer 502, thereby achieving the caliber adjustment of the water inlet pipe 500 and the water outlet pipe 600. Such design can improve the adaptability of the water turbine under different water flow conditions, thereby improving the overall performance of the water turbine.

[0026] The piezoelectric material layer is a structure composed of materials with piezoelectric effect. The piezoelectric material is usually some crystal or ceramic material, which will generate an electric field when subjected to mechanical stress, and vice versa, the material will deform when an electric field is applied. In the application of the present application, when combined with the pipe, the piezoelectric material layer can be clamped between the annular inner layer 503 and the annular outer layer 501 of the pipe. By controlling the voltage of the external power supply connected to the piezoelectric material layer, the degree of deformation of the piezoelectric material layer can be controlled, thereby controlling the caliber of the pipe.

[0027] It can be understood that the annular inner layer 503 and the annular outer layer 501 both adopt materials with certain strength and flexibility.

[0028] As a preferred embodiment, the material of the annular piezoelectric material layer 502 is piezoelectric ceramic or piezoelectric polymer.

[0029] In the above embodiment, piezoelectric ceramic is a functional ceramic material that can convert mechanical energy and electrical energy. When an external force is applied, an electric field is generated; conversely, when an electric field is applied, deformation occurs. When applied to the present application, piezoelectric ceramic has many advantages: first, the response speed is high, and it can quickly deform according to the change of electric field to realize the rapid adjustment of the pipe diameter. Second, the deformation precision is high, and the pipe shape control can be realized more accurately. Third, it has good durability and stability, and the performance is stable for long-term use. In addition, it is small in size and light in weight, and will not add too much burden to the pipeline system.

[0030] Piezoelectric polymer is a kind of high polymer material with piezoelectric effect, usually composed of polymers with special molecular structure. When subjected to mechanical stress, an electric field is generated, and when an electric field is applied, deformation occurs. When applied to the present application, piezoelectric polymer has the following advantages: first, it has good flexibility and can better adapt to changes in pipe shape, and is not easy to break during deformation. Second, it is relatively light and will not add too much weight burden to the pipeline system. Third, it is low in cost and easy to process, and can be customized according to different pipe requirements. Fourth, it has good corrosion resistance and chemical stability, and can maintain stable performance in various harsh environments.

[0031] As a preferred embodiment, the water inlet pipe 500 can be detachably arranged at the water inlet.

[0032] In the above embodiment, the water inlet pipe 500 is detachably arranged, which greatly facilitates the cleaning work of the water inlet. The water inlet pipe 500 and the water inlet are connected by bolts to realize detachable connection, which can quickly connect or disassemble. At the same time, sealing gaskets are arranged at the connection between the water inlet pipe 500 and the water inlet, which effectively improves the sealing performance of the connection between the two, ensuring stable operation of the system.

[0033] As a preferred embodiment, the material of the annular inner layer 503 is fiber reinforced plastic.

[0034] In the above embodiment, the fiber-reinforced plastic is a high-performance material composed of a fiber material and a matrix material through a specific process. As the material of the inner layer of the pipe (the water inlet pipe 500 or the water outlet pipe 600), it has many advantages: first, it has high strength and rigidity, can withstand large pressure and external force, and ensure the structural stability of the pipe. Second, the fiber-reinforced plastic has good corrosion resistance and can resist the corrosion of various chemicals, prolonging the service life of the pipe. Third, it is light in weight, easy to transport and install, and reduces engineering cost. In addition, the fiber-reinforced plastic also has good insulation and heat insulation performance, which can reduce energy loss and prevent the internal temperature of the pipe from being too high.

[0035] As a more preferred embodiment, the material of the annular outer layer 501 is a metal matrix composite material.

[0036] In the above embodiment, the metal matrix composite material is a material composed of a metal or alloy as the matrix and high-performance fibers, whiskers, particles, etc. as the reinforcing body. As the outer layer material of the pipe, it has the following advantages: first, it has high specific strength and specific rigidity, which can reduce the weight of the pipe while ensuring strength. Second, it has good wear resistance and corrosion resistance, which can effectively resist external environmental erosion and prolong the service life of the pipe. Third, it has good thermal stability and can maintain stable performance at high temperatures, suitable for different working environments.

[0037] Further, the annular outer layer 501 is coated with an insulating coating.

[0038] As a more preferred embodiment, the inside of the steel volute shell 100 can be rotatably provided with a turbine 200.

[0039] The turbine 200 and the steel volute shell 100 are connected by a pump shaft 400.

[0040] In the above embodiment, the pump shaft 400 is connected to a power structure, such as a drive motor. The power structure drives the pump shaft 400 to rotate, and then the turbine 200 rotates. The rotation of the turbine 200 in the steel volute shell 100 forms a negative pressure, which facilitates the suction of water flow from the water inlet pipe 500, and then the water flow is discharged from the water outlet pipe 600 after passing through the steel volute shell 100, realizing the transportation of water flow.

[0041] As a more preferred embodiment, one end of the pump shaft 400 penetrates the outer side of the steel volute shell 100 and is covered with a protective shell 300.

[0042] The rotating connection between the pump shaft 400 and the steel volute shell 100 is provided with a bearing.

[0043] In the above embodiment, the design of the bearing reduces the friction between the pump shaft 400 and the steel volute shell 100 and the pump shaft 400, thereby reducing energy loss.

[0044] As a preferred embodiment, the protective shell 300 is detachably connected with the steel volute shell 100 through a bolt set.

[0045] In the above embodiment, the protective shell 300 protects the steel volute shell 100. The protective shell 300 is annular, which can effectively protect the connection between the power structure and the pump shaft 400, and ensure the stable operation of the equipment.

[0046] The working principle of the utility model is as follows:

[0047] In actual use, when it is necessary to adjust the caliber of the water inlet pipe 500 and the water outlet pipe 600 to adapt to the increase or decrease of water flow, the voltage applied to the annular piezoelectric material layer 502 can be controlled to achieve the adjustment. After a specific voltage is applied, the annular piezoelectric material layer 502 will expand or contract. Since the annular outer layer 501 and the annular inner layer 503 are both flexible, they will expand or contract synchronously under the drive of the annular piezoelectric material layer 502, thereby achieving the caliber adjustment of the water inlet pipe 500 and the water outlet pipe 600. Such a design can improve the adaptability of the water turbine under different water flow conditions, thereby improving the overall performance of the water turbine.

Claims

1. A steel spiral case for a pumped storage power plant, characterized in that, The application relates to a steel volute shell (100) provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are respectively communicated with a water inlet pipeline (500) and a water outlet pipeline (600). The water inlet pipeline (500) and the water outlet pipeline (600) are both provided with a ring-shaped outer layer (501), a ring-shaped piezoelectric material layer (502) and a ring-shaped inner layer (503) arranged concentrically and coaxially, the ring-shaped outer layer (501) and the ring-shaped inner layer (503) are both flexible, the ring-shaped inner layer (503) is arranged in the ring-shaped outer layer (501), the ring-shaped piezoelectric material layer (502) is clamped and fixed between the ring-shaped outer layer (501) and the ring-shaped inner layer (503), and the ring-shaped piezoelectric material layer (502) is electrically connected with an external power supply.

2. A steel spiral case for pumped storage power plants according to claim 1, characterized in that, The material of the ring-shaped piezoelectric material layer (502) is piezoelectric ceramic or piezoelectric polymer.

3. A steel spiral case for pumped storage power plants according to claim 1, characterized in that, The water inlet pipeline (500) is detachably arranged at the water inlet.

4. A steel spiral case for pumped storage power plants according to claim 2, characterized in that, The material of the ring-shaped inner layer (503) is fiber reinforced plastic.

5. A steel spiral case for pumped storage power plants according to claim 2, characterized in that, The material of the ring-shaped outer layer (501) is metal matrix composite material.

6. A steel spiral case for pumped storage power plants according to claim 1, characterized in that, A turbine (200) is rotatably arranged in the steel volute shell (100). The turbine (200) and the steel volute shell (100) are connected through a pump shaft (400).

7. A steel spiral case for pumped storage power plants according to claim 6, characterized in that, One end of the pump shaft (400) penetrates through the outer side of the steel volute shell (100) and is covered with a protective shell (300). A bearing is arranged at the rotating connection position of the pump shaft (400) and the steel volute shell (100).

8. A steel spiral case for pumped storage power plants according to claim 7, characterized in that, The protective shell (300) and the steel volute shell (100) are detachably connected through a bolt group.

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