Self-adaptive deformation turbine runner blade

Abstract

The utility model relates to the technical field of water turbines, in particular to a self-adaptive deformation water turbine runner blade which comprises a supporting frame, a pressure sensing element and a controller, and the pressure sensing element is electrically connected with the controller. Main blades are distributed on the support frame; the main blade comprises supporting beams and auxiliary blades, the supporting beams are arranged on the supporting frame at intervals, shape memory alloy parts are arranged at the ends, away from the supporting frame, of the supporting beams, the shape memory alloy parts are connected with the auxiliary blades, temperature adjusting devices are arranged on the shape memory alloy parts and electrically connected with the controller, and the shape memory alloy parts are configured to be under different pressure conditions. And the sub-blades are deformed along the extension direction of the sub-blades, and the corresponding main blades have corresponding shapes by driving the sub-blades to move. According to the utility model, the water turbine can keep the optimal operation state under different working conditions, and the energy conversion efficiency is improved; the influence of water flow pressure fluctuation on the water turbine can be effectively reduced, vibration and noise levels are reduced, and the running stability of the water turbine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine technical field, specifically, a self -adaptation deformation water turbine runner blade. BACKGROUND

[0002] Water turbine is the core equipment of hydropower station, and the performance of its runner blade directly affects the power generation efficiency and the stable operation of the unit. The traditional water turbine runner blade is mostly fixed shape, which is difficult to adapt to the change of water pressure under different working conditions, resulting in reduced efficiency under some working conditions, even vibration and stress concentration, and safety hazards such as blade cracks. SUMMARY

[0003] The utility model discloses a self -adaptation deformation water turbine runner blade, through the self -adaptation deformation of water turbine runner blade, to solve the technical problem that the existing water turbine runner blade is difficult to adapt to the change of water pressure under different working conditions.

[0004] The utility model discloses a self -adaptation deformation water turbine runner blade, through the self -adaptation deformation of water turbine runner blade, to solve the technical problem that the existing water turbine runner blade is difficult to adapt to the change of water pressure under different working conditions.

[0005] The support frame is composed of a first main beam and a second main beam, the first main beam and the second main beam are staggered, and main blades are arranged on the first main beam and the second main beam.

[0006] The main blade is composed of a support beam and a sub blade, the support beam is arranged on the side surface of the first main beam and the second main beam at intervals, the first end of the support beam is connected with the corresponding first main beam or second main beam, the second end of the support beam is provided with a shape memory alloy part, the shape memory alloy part is connected with the sub blade, a temperature adjusting device is arranged on the shape memory alloy part, the temperature adjusting device is electrically connected with the controller, and the shape memory alloy part is configured to deform along its extension direction under different pressure conditions and drive the sub blade to move to make the corresponding main blade have a corresponding shape.

[0007] According to a preferred embodiment, the sub blade is in the form of a wing.

[0008] According to a preferred embodiment, the surface of the sub blade is provided with an insulating layer made of wear-resistant and corrosion-resistant material.

[0009] According to a preferred embodiment, the pressure sensing element is a piezoelectric film or piezoelectric ceramic.

[0010] According to a preferred embodiment, the piezoelectric film or piezoelectric ceramic is arranged on the outer side of the insulating layer.

[0011] According to a preferred embodiment, the shape memory alloy piece comprises a shape memory alloy spring and a guide rod, the support beam is a hollow rod, the guide rod is slidingly connected in the hollow rod, and the guide rod penetrates through the shape memory alloy and is connected with the sub-blade.

[0012] According to a preferred embodiment, the temperature adjusting device is a semiconductor heat pump, and the semiconductor heat pump is sleeved outside the shape memory alloy spring.

[0013] The technical scheme of the self-adaptive deformation water turbine runner blade provided by the utility model has at least the following advantages and beneficial effects: (1) the shape of the runner blade is self-adaptively adjusted, so that the water turbine can maintain the optimal operating state under different working conditions and the energy conversion efficiency is improved; (2) the influence of water flow pressure fluctuation on the water turbine is effectively reduced, the vibration and noise level are reduced, and the stability of the water turbine operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure diagram of the runner blade provided by the utility model embodiment 1 is provided.

[0015] The figure mark: 1-pressure sensing element, 2-support frame, 201-first main beam, 202-second main beam, 3-main blade, 301-support beam, 302-sub-blade. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme in the utility model embodiments will be described clearly and completely in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Embodiment 1

[0018] Figure 1 The structure diagram of the self-adaptive deformation water turbine runner blade provided by the utility model embodiment is provided. Referring to Figure 1 As shown in the figure, the self-adaptive deformation water turbine runner blade comprises a support frame 2, a pressure sensing element 1 and a controller.

[0019] The pressure sensing element 1 is electrically connected with the controller, the pressure sensing element 1 is used for acquiring water flow pressure, and the acquired water flow pressure is sent to the controller, and then the shape of the runner blade is adjusted through the controller, so that the water turbine can maintain the best operating state under different working conditions, thereby improving the energy conversion efficiency; in addition, adjusting the shape of the runner blade according to the water flow pressure can also effectively reduce the influence of water flow pressure fluctuation on the water turbine, reduce the vibration and noise level, and improve the stability of the water turbine operation.

[0020] Specifically, the support frame 2 is composed of a first main beam 201 and a second main beam 202, the first main beam 201 and the second main beam 202 are staggered, and the whole is in the shape of a cross, which is used as a skeleton for installing the main blades 3, and the first main beam 201 and the second main beam 202 are uniformly provided with the main blades 3.

[0021] In one embodiment of the present embodiment, the main blade 3 is composed of a support beam 301 and a sub-blade 302, the sub-blade 302 is in the shape of a wing or a hook jade, etc., which is not limited here; the surface of the sub-blade 302 is provided with an insulating layer made of wear-resistant and corrosion-resistant material; the pressure sensing element 1 is a piezoelectric film, a piezoelectric ceramic or a pressure sensor, in a preferred embodiment of the present embodiment, the piezoelectric film or the piezoelectric ceramic is arranged on the outside of the insulating layer, compared with arranging the pressure sensor, the same is to measure the water flow pressure on the surface of the sub-blade 302, on the one hand, the measurement accuracy is higher, on the other hand, the stress condition of each sub-blade 302 can be obtained, and then the certain sub-blade 302 can be adjusted individually, to realize the fine adjustment of the shape of the main blade 3, the specific adjustment method is to control a single shape memory alloy part, which is not described here; in addition, if the pressure sensor is selected, the pressure sensor can be arranged on the water turbine to directly measure the water flow pressure.

[0022] The support beams 301 are arranged at intervals on the side surfaces of the first main beam 201 and the second main beam 202, the interval size is determined according to the length of the sub-blade 302, so that the sub-blade 302 can be densely arranged on the side surfaces of the first main beam 201 and the second main beam 202. Further, the first end of the support beam 301 is connected with the corresponding first main beam 201 or second main beam 202, and the second end of the support beam 301 is provided with a shape memory alloy part, in a preferred embodiment of the present embodiment, the shape memory alloy part includes a shape memory alloy spring and a guide rod, the support beam 301 is a hollow rod, the guide rod is slidingly connected in the hollow rod, and the guide rod penetrates through the shape memory alloy and is connected with the sub-blade 302.

[0023] The temperature adjusting device is electrically connected with a controller, the shape memory alloy piece is configured to deform along its extension direction under different pressure conditions, and the sub-leaf 302 is moved to make the corresponding main leaf 3 have a corresponding shape. Further, the temperature adjusting device is a semiconductor heat pump, the semiconductor heat pump is sleeved outside the shape memory alloy spring, when the semiconductor heat pump heats the shape memory alloy spring, the shape memory alloy spring is shortened, and then the sub-leaf 302 is displaced towards the direction of the support beam 301, at this time, the shape of the main leaf 3 is changed and the overall area is reduced, and vice versa, the area of the main leaf 3 can be increased by refrigerating the shape memory alloy spring.

[0024] Further, a sealing structure is arranged between each sub-leaf 302, for example, a water-proof film is used to connect the connected sub-leaf 302, the main leaf 3 is sealed, water flow is prevented from entering the inside of the main leaf 3 through the gap between the sub-leaf 302, and then the temperature adjusting device is damaged; in order to adapt to the displacement of the sub-leaf 302, the water-proof film should be an elastic film, which is not described in detail here.

[0025] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An adaptive deformation hydro turbine runner blade, characterized by, The application relates to a pressure sensor, which comprises a support frame (2), a pressure sensing element (1) and a controller, wherein the pressure sensing element (1) is electrically connected with the controller. The support frame (2) is composed of a first main beam (201) and a second main beam (202), the first main beam (201) and the second main beam (202) are arranged alternately, and main leaves (3) are arranged on the first main beam (201) and the second main beam (202) in a uniform manner. The main leaf (3) is composed of a support beam (301) and a sub-leaf (302), the support beam (301) is arranged on the side surface of the first main beam (201) and the second main beam (202) in a spaced manner, the first end of the support beam (301) is connected with the corresponding first main beam (201) or second main beam (202), the second end of the support beam (301) is provided with a shape memory alloy part, the shape memory alloy part is connected with the sub-leaf (302), a temperature adjusting device is arranged on the shape memory alloy part, the temperature adjusting device is electrically connected with the controller, and the shape memory alloy part is configured to deform along the extension direction thereof under different pressure conditions and drive the sub-leaf (302) to move so that the corresponding main leaf (3) has a corresponding shape.

2. The self-adapting deformation hydraulic turbine runner blade according to claim 1, characterized in that, The sub-leaf (302) is in a wing type.

3. The self-adapting water turbine runner blade of claim 1, wherein, The surface of the sub-leaf (302) is provided with an insulation layer, and the insulation layer is made of wear-resistant and corrosion-resistant materials.

4. The self-adapting water turbine runner blade of claim 3, wherein, The pressure sensing element (1) is a piezoelectric film or a piezoelectric ceramic.

5. The self-adapting deformable hydraulic turbine runner blade of claim 4, wherein, The piezoelectric film or the piezoelectric ceramic is arranged on the outer side of the insulation layer.

6. The self-adapting deformation hydraulic turbine runner blade according to any one of claims 1 to 5, characterized in that, The shape memory alloy part comprises a shape memory alloy spring and a guide rod, the support beam (301) is a hollow rod, the guide rod is slidably connected in the hollow rod, and the guide rod penetrates through the shape memory alloy part and is connected with the sub-leaf (302).

7. The self-adapting water turbine runner blade of claim 6, wherein, The temperature adjusting device is a semiconductor heat pump, and the semiconductor heat pump is sleeved on the outer side of the shape memory alloy spring.

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