High-cavitation-resistance high-efficiency water turbine runner

Abstract

The invention relates to the technical field of hydroelectric power generation equipment, in particular to a high-cavitation-resistance efficient water turbine runner which comprises a hub, a plurality of blades are fixedly arranged on the inner side of the hub, two sets of V-shaped flow guide grooves are formed in the front edges of the blades so as to adapt to the radial flow velocity gradient, and a shell is installed on the outer side of the hub and the outer sides of the blades. A plurality of flow guide parts are arranged on the inner side of the shell, the flow guide parts are driven by axial force to rotate, stretch out and draw back to extend or contract, a plurality of transmission parts are arranged at the top of the shell, the transmission parts are driven by the axial force to rotate, two power parts are symmetrically arranged at the tops of the transmission parts, and the two power parts are provided with two symmetrical power sources and horizontally stretch out and draw back and twist at two positions. By means of the arrangement of the two sets of V-shaped flow guide grooves in the front edge of the blade, water flow impacts in the V-shaped flow guide grooves, the V-shaped flow guide grooves divide the water flow into multiple laminar micro-jet flows, the local flow velocity gradient at the front edge stagnation point is reduced, low-pressure vortexes are formed, and the low-pressure vortexes can adsorb cavitation nuclei.

Description

Technical Field

[0001] The present invention relates to the technical field of hydroelectric power generation equipment, and more specifically, to a high cavitation-resistant and high-efficiency water turbine runner. Background Art

[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. The structure of a water turbine includes a runner, a guide vane mechanism, a spiral case, a main shaft, and a draft tube. Its working principle is that the water flow impacts or the reaction force drives the runner to rotate, converting the water energy into mechanical energy. The cavitation phenomenon refers to the dynamic process in which, during the energy conversion process of the water flow, the local pressure drops below the vaporization pressure, causing the liquid to vaporize and form bubbles (including steam and dissolved gases), and then the bubbles move with the water flow and collapse in the high-pressure area.

[0003] Currently, when the existing water turbine runners are in use, the following defects exist:

[0004] Firstly, the blades of the water turbine runner are usually smooth and flat. When the water turbine runner rotates, the smooth and flat blades of the water turbine runner cannot adapt to the radial velocity gradient. The water flow impacts the leading edge of the blade, and the water flow is easily cut by the blade, generating a large number of tiny bubbles, exacerbating the cavitation phenomenon.

[0005] Secondly, the water turbine runner is generally equipped with a flow guiding structure to change water flow parameters such as the size and direction of the water flow. However, the flow guiding structure of the existing runner can only rotate within a limited range to adjust the water flow direction and size, and it is not easy to accurately control the water flow parameters and cannot adapt to complex hydrological conditions. In view of this, we propose a high cavitation-resistant and high-efficiency water turbine runner. Summary of the Invention

[0006] Aiming at the technical problems existing in the prior art, the present invention provides a high cavitation-resistant and high-efficiency water turbine runner to solve the problems that the smooth and flat blades of the existing water turbine runner cannot adapt to the radial velocity gradient, the water flow impacts the leading edge of the blade, the water flow is easily cut by the blade, generating a large number of tiny bubbles, exacerbating the cavitation phenomenon, and the flow guiding structure of the existing runner can only rotate within a limited range to adjust the water flow direction and size, and it is not easy to accurately control the water flow parameters.

[0007] To achieve the above object, a high cavitation-resistant and high-efficiency water turbine runner includes a hub. A plurality of blades are fixedly arranged inside the hub. The plurality of blades are annularly distributed. Two groups of V-shaped diversion grooves are provided at the leading edges of the plurality of blades to adapt to the radial flow velocity gradient, divide the mainstream into multiple laminar microjets, and form a low-pressure vortex. An outer shell is installed outside the hub and the plurality of blades. A plurality of diversion parts for changing the size and direction of the water flow are arranged inside the outer shell. The diversion parts are driven by the axial force to rotate and generate a two-way horizontal force, and expand or contract to balance the water flow distribution. A plurality of transmission parts for transmitting the axial force are arranged at the top of the outer shell. The transmission parts are driven by the axial force to rotate, and equally disperse and form a plurality of driving forces to drive their own rotation, providing the axial force for the rotation of the diversion parts. Two power parts for generating horizontal forces are symmetrically arranged at the top of the transmission parts. The two power parts are provided with two symmetrical power sources, and perform two-position horizontal expansion and contraction and torsion to convert the horizontal acting force into the axial force.

[0008] The beneficial effects of the present invention are as follows:

[0009] 1) In this high cavitation-resistant and high-efficiency water turbine runner, through the setting of two groups of V-shaped diversion grooves at the leading edges of the blades, the water flow impacts in the V-shaped diversion grooves. The V-shaped diversion grooves divide the water flow into multiple laminar microjets, reduce the local flow velocity gradient at the leading edge stagnation point, and the laminar microjets form a low-pressure vortex in the V-shaped diversion grooves. The low-pressure vortex can adsorb cavitation nuclei and inhibit their development into macroscopic cavities, which is beneficial to eliminating microbubbles and weakening the cavitation phenomenon.

[0010] 2) In this high cavitation-resistant and high-efficiency water turbine runner, the axial force is generated by the expansion and contraction of the power parts to drive the operation of the transmission parts. The transmission parts convert the first-level axial force into multiple second-level axial forces, and the multiple second-level axial forces respectively drive the rotation of the multiple diversion parts to change the size and direction of the water flow. Then, combined with the operation of the diversion parts themselves to generate a two-way horizontal force, expand or contract to balance the water flow distribution, which is beneficial to further accurately control the water flow parameters and adapt to complex hydrological conditions.

[0011] Based on the above technical solutions, the present invention can be further improved as follows:

[0012] As a further improvement of this technical solution, the hub is fixedly installed on the main shaft, and the axis lines of the hub and the plurality of blades coincide with the axis line of the main shaft.

[0013] The beneficial effect of adopting the above further solution is that the hub and the plurality of blades rotate under the impact of the water flow to drive the rotation of the main shaft, and the rotation of the main shaft drives the configured power generation device to generate electricity, achieving the purpose of power generation.

[0014] As a further improvement of the technical solution, each of the V-shaped flow guiding grooves in a group close to the wheel hub is evenly and densely distributed, while each of the V-shaped flow guiding grooves in another group far from the wheel hub is evenly and sparsely distributed.

[0015] The beneficial effect of adopting the above further solution is that through two groups of V-shaped flow guiding grooves with uniform distribution but different densities, when the water flow impacts on the two groups of V-shaped flow guiding grooves, the V-shaped flow guiding grooves close to the wheel hub bear a larger water flow velocity. Therefore, the V-shaped flow guiding grooves are more densely distributed, and tips are formed between different V-shaped flow guiding grooves at this place to cut the bubbles in the water flow. Relatively, the V-shaped flow guiding grooves far from the wheel hub bear a smaller water flow velocity, so the V-shaped flow guiding grooves at this place are more sparsely distributed, adapting to the radial velocity gradient and piercing the bubbles in the water flow to reduce the cavitation phenomenon.

[0016] As a further improvement of the technical solution, each of the plurality of flow guiding parts includes a first rotating shaft. The tops of the plurality of first rotating shafts all pass through the outer shell and are connected to the transmission part. The bottoms of the plurality of first rotating shafts are all fixedly provided with flow guiding members through first bolts. The bottoms of the flow guiding members are fixedly provided with second rotating shafts through second bolts. The bottoms of the plurality of second rotating shafts are all rotatably connected to the inner wall of the outer shell;

[0017] The axis of the first rotating shaft coincides with the axis of the second rotating shaft.

[0018] The beneficial effect of adopting the above further solution is that the total axial force generated by the power part is divided into axial forces in multiple directions through the transmission part, driving the first rotating shaft to rotate, and then driving the flow guiding member to rotate within a set angle with the first rotating shaft as the axis, so as to change the distance between adjacent flow guiding members, achieving the problem of changing the water flow direction and magnitude. And if the flow guiding member is damaged due to being impacted by the water flow after long-term use, through the first bolt and the second bolt, it can also achieve the purpose of conveniently replacing a new flow guiding member, saving resources.

[0019] As a further improvement of the technical solution, the flow guiding member includes a flow guiding block. The top of the flow guiding block is fixedly connected to the bottom of the first rotating shaft through a first bolt. The bottom of the flow guiding block is fixedly connected to the top of the second rotating shaft through a second bolt. Installation grooves are symmetrically formed on both sides of the flow guiding block. A flow guiding shell is slidably arranged on the inner wall of the installation groove.

[0020] The beneficial effect of adopting the above further solution is that the flow guiding shell slides along the inner wall of the installation groove to expand and contract, generating a horizontal force to change the width of the flow guiding member composed of the flow guiding block and the flow guiding shell to balance the water flow distribution.

[0021] As a further improvement of the technical solution, a group of electric telescopic rods are fixedly arranged at the bottom of the installation groove, and the number of the group of electric telescopic rods is at least two;

[0022] The axis of the electric telescopic rod is perpendicular to the axes of the first rotating shaft and the second rotating shaft.

[0023] The beneficial effect of adopting the above further solution is that the electric telescopic rod generates a horizontal force through its own expansion and contraction, driving the diversion shell to slide inside the installation groove, thereby flexibly changing the width of the diversion member composed of the diversion block and the diversion shell to balance the water flow distribution.

[0024] As a further improvement of this technical solution, the transmission part includes a rotating ring, the rotating ring is rotatably arranged on the top of the housing and is connected to the power part;

[0025] The axis of the rotating ring coincides with the axis of the hub.

[0026] The beneficial effect of adopting the above further solution is that the power part drives the rotating ring to reciprocate within a set angle to generate an axial force, and the transmission part divides the first-level axial force generated by the rotating ring into second-level axial forces in multiple directions to drive the first rotating shaft, the second rotating shaft, the diversion block and the diversion shell to rotate within a set angle, so as to achieve the purpose of adjusting the water flow size and direction.

[0027] As a further improvement of this technical solution, a plurality of first transmission bars are hinged on the outer wall of the rotating ring, a second transmission bar is hinged at one end of the first transmission bar away from the rotating ring, and the other end of the second transmission bar away from the first transmission bar is fixedly connected to the top end of the first rotating shaft;

[0028] The plurality of first transmission bars and second transmission bars are all annularly distributed.

[0029] The beneficial effect of adopting the above further solution is that the power part drives the rotating ring to rotate within a set angle, and then drives a plurality of first transmission bars to move and rotate along a set track, and then drives the second transmission bar to rotate around the first rotating shaft, and then drives the first rotating shaft, and then drives the diversion block and the diversion shell to rotate around the first rotating shaft to change the water flow direction and size and balance the water flow distribution.

[0030] As a further improvement of this technical solution, both of the power parts include fixing blocks, the bottoms of the two fixing blocks are respectively fixedly arranged at both ends of the top of the rotating ring, and connecting rods are hinged inside both of the fixing blocks.

[0031] The beneficial effect of adopting the above further solution is that the connecting rod moves in the horizontal direction, driving the fixing block to rotate around the axis of the rotating ring, converting the horizontal acting force into the first-level axial force of the rotating ring, and through the transmission action of the first transmission bar and the second transmission bar, the first-level axial force is divided into multiple second-level axial forces to drive the first rotating shaft, the diversion block and the diversion shell to rotate, so as to change the water flow direction and size.

[0032] As a further improvement of this technical solution, both of the said power units further include cylinders, and the output ends of the two cylinders are respectively hinged to one ends of the two connecting rods.

[0033] The beneficial effect of adopting the above further solution is that through the telescopic movement of the cylinders themselves, a horizontal force is generated to drive the connecting rods to move in the horizontal direction, and then drive the fixed block to rotate around the axis of the rotating ring, and then drive the rotating ring to rotate, generating a primary axial force. Then, through the transmission of the first transmission bar and the second transmission bar, multiple secondary axial forces are generated, and then drive the corresponding first rotating shafts to rotate respectively, and then drive the flow guiding blocks and the flow guiding shells to rotate to adjust the flow direction and size of the water flow.

[0034] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The following will refer to the drawings to make a further detailed description of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the external first perspective structure of the whole of the present invention;

[0036] Figure 2 It is a schematic diagram of the external second perspective structure of the whole of the present invention;

[0037] Figure 3 It is a schematic diagram of the sectional structure of the whole of the present invention;

[0038] Figure 4 It is a schematic diagram of the structure in which the telescopic movement of the cylinder of the present invention drives the transmission parts to operate;

[0039] Figure 5 It is a schematic diagram of the structure in which the flow guiding part of the present invention rotates;

[0040] Figure 6 It is a schematic diagram of the connection structure between the hub and the blade and the main shaft of the present invention;

[0041] Figure 7 It is a schematic diagram of the external structure of the flow guiding part of the present invention;

[0042] Figure 8 It is a schematic diagram of the sectional structure of the flow guiding part of the present invention;

[0043] Figure 9 It is a schematic diagram of the width adjustment structure of the flow guiding block and the flow guiding shell of the present invention;

[0044] Figure 10 It is a schematic diagram of the blade of the present invention dividing the water flow into multiple laminar flow micro jets.

[0045] The meanings of the various reference numerals in the drawings are as follows:

[0046] 1. Hub; 2. Blade; 3. V-shaped flow guiding groove; 4. Outer shell; 5. Flow guiding part; 51. First rotating shaft; 52. Second rotating shaft; 53. Flow guiding block; 54. Installation groove; 55. Flow guiding shell; 56. Electric telescopic rod; 6. Transmission part; 61. Rotating ring; 62. First transmission bar; 63. Second transmission bar; 7. Power part; 71. Fixed block; 72. Connecting rod; 73. Cylinder; 8. Main shaft. Specific embodiments

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] The blades of the smooth and flat water turbine runner cannot adapt to the radial flow velocity gradient. The water flow impacts the leading edge of the blade, and the water flow is easily cut by the blade, generating a large number of tiny bubbles, exacerbating the cavitation phenomenon, and the existing flow guiding part of the runner can only rotate within a limited range to adjust the water flow direction and size, and it is not easy to accurately control the water flow parameters.

[0049] Therefore, the present invention provides a high cavitation-resistant and high-efficiency water turbine runner. Please refer to Figures 1-10 , which includes a hub 1. A plurality of blades 2 are fixedly arranged inside the hub 1. The plurality of blades 2 are annularly distributed. Two groups of V-shaped flow guiding grooves 3 are opened at the leading edges of the plurality of blades 2 to adapt to the radial flow velocity gradient. As Figure 10 shown, the mainstream is divided into multiple laminar microjets, and a low-pressure vortex is formed. An outer shell 4 is installed outside the hub 1 and the plurality of blades 2. A plurality of flow guiding parts 5 for changing the water flow size and direction are arranged inside the outer shell 4. The flow guiding part 5 is driven by an axial force to rotate and generates a bidirectional horizontal force, and expands or contracts to balance the water flow distribution. A plurality of transmission parts 6 for transmitting the axial force are arranged at the top of the outer shell 4. The transmission part 6 is driven by the axial force to rotate, and evenly disperses and forms a plurality of driving forces to drive its own rotation, providing an axial force for the rotation of the flow guiding part 5. Two power parts 7 for generating horizontal forces are symmetrically arranged at the top of the transmission part 6. The two power parts 7 are provided with two symmetrical power sources, with double-position horizontal expansion and contraction and torsion, converting the horizontal acting force into an axial force, where:

[0050] As shown in the present invention Figures 1-3 , considering that the leading edges of the blades 2 of the water turbine are usually smooth and flat, when the hub 1 and the blades 2 rotate, the smooth and flat blades 2 cannot adapt to the radial flow velocity gradient. The water flow impacts the leading edge of the blade 2, and the water flow is easily cut by the blade 2, generating a large number of tiny bubbles, exacerbating the cavitation phenomenon. Therefore, as Figure 6As shown, through the arrangement of two groups of V-shaped flow guiding grooves 3 at the leading edge of the blade 2, the water flow impacts within the V-shaped flow guiding grooves 3. The V-shaped flow guiding grooves 3 divide the water flow into multiple laminar micro-jets, reducing the local flow velocity gradient at the leading edge stagnation point. Moreover, laminar micro-jets form low-pressure vortices within the V-shaped flow guiding grooves. The low-pressure vortices can adsorb cavitation nuclei and inhibit their development into macroscopic cavities, which is beneficial for eliminating micro-bubbles and weakening the cavitation phenomenon;

[0051] And generally, a flow guiding part 5 is configured on the hub 1 and the blade 2 of the water turbine to change water flow parameters such as the magnitude and direction of the water flow. However, the existing flow guiding part 5 can only rotate within a limited range to achieve the adjustment of the water flow direction and magnitude, and it is not easy to accurately control the water flow parameters and cannot adapt to complex hydrological conditions. Therefore, as Figure 7 shown, axial force is generated by the expansion and contraction of the power part 7 to drive the operation of the transmission part 6. The transmission part 6 converts the first-level axial force into multiple second-level axial forces. The multiple second-level axial forces respectively drive multiple flow guiding parts 5 to rotate to change the magnitude and direction of the water flow. Then, in cooperation with the bidirectional horizontal force generated by the self-operation of the flow guiding part 5, which expands or contracts, the water flow distribution is balanced, which is beneficial for further accurately controlling the water flow parameters and adapting to complex hydrological conditions.

[0052] On the above basis, the specific structure is disclosed in detail:

[0053] To enable the water flow to enter the interior of the water turbine and drive the hub 1 and the blade 2 to rotate to generate axial force for power generation, it is necessary to explain the installation method of the hub 1 and the blade 2. Therefore, as Figure 6 shown, the hub 1 is fixedly installed on the main shaft 8, and the axis lines of the hub 1 and the multiple blades 2 coincide with the axis line of the main shaft 8. The hub 1 and the multiple blades 2 rotate under the impact of the water flow to drive the main shaft 8 to rotate. The rotation of the main shaft 8 then drives the configured power generation device to generate electricity, achieving the purpose of power generation.

[0054] Considering that two groups of V-shaped flow guiding grooves 3 on the blade 2 need to adapt to the radial flow velocity gradient, it is necessary to disclose the distribution of the two groups of V-shaped flow guiding grooves 3 on the blade 2. Therefore, as Figure 6 shown, each V-shaped flow guiding groove 3 in one group of V-shaped flow guiding grooves 3 close to the hub 1 is evenly distributed and dense, while each V-shaped flow guiding groove 3 in the other group of V-shaped flow guiding grooves 3 far from the hub 1 is evenly distributed and sparse. Through the two groups of evenly distributed but different-density V-shaped flow guiding grooves 3, the water flow impacts on the two groups of V-shaped flow guiding grooves 3. The V-shaped flow guiding grooves 3 close to the hub 1 bear a larger water flow velocity, so the distribution of the V-shaped flow guiding grooves 3 is relatively dense. Tips are formed between different V-shaped flow guiding grooves 3 at this location to cut the bubbles in the water flow. Relatively, the V-shaped flow guiding grooves 3 far from the hub 1 bear a smaller water flow velocity, so the distribution of the V-shaped flow guiding grooves 3 at this location is relatively sparse, adapting to the radial flow velocity gradient and piercing the bubbles in the water flow to reduce the cavitation phenomenon.

[0055] Considering that the flow guiding part 5 needs to rotate under the axial force to adjust the direction and magnitude of the water flow impacting the hub 1 and the blades 2, it is necessary to disclose the specific structure of the flow guiding part 5. Therefore, as Figure 7 shown, multiple flow guiding parts 5 each include a first rotating shaft 51. The tops of the multiple first rotating shafts 51 all pass through the housing 4 and are connected to the transmission part 6. The bottoms of the multiple first rotating shafts 51 are all fixedly provided with flow guiding members through first bolts. The bottoms of the flow guiding members are fixedly provided with second rotating shafts 52 through second bolts. The bottoms of the multiple second rotating shafts 52 are all rotatably connected to the inner wall of the housing 4;

[0056] The axis of the first rotating shaft 51 coincides with the axis of the second rotating shaft 52;

[0057] The transmission part 6 divides the total axial force generated by the power part 7 into axial forces in multiple directions, driving the first rotating shaft 51 to rotate, and then driving the flow guiding member to rotate within a set angle with the first rotating shaft 51 as the axis, thereby changing the distance between adjacent flow guiding members, achieving the purpose of changing the water flow direction and magnitude. And if the flow guiding member is damaged by the water flow impact after long-term use, through the first bolt and the second bolt, it is also possible to conveniently replace the new flow guiding member, saving resources.

[0058] Among them, to make the flow guiding member generate bidirectional horizontal forces, expand or contract by telescoping to balance the water flow distribution, it is necessary to continue to disclose the specific structure of the flow guiding member. Therefore, as Figure 7 shown, the flow guiding member includes a flow guiding block 53. The top of the flow guiding block 53 is fixedly connected to the bottom of the first rotating shaft 51 through a first bolt. The bottom of the flow guiding block 53 is fixedly connected to the top of the second rotating shaft 52 through a second bolt. Installation grooves 54 are symmetrically formed on both sides of the flow guiding block 53. A flow guiding shell 55 is slidably arranged on the inner wall of the installation groove 54. By sliding the flow guiding shell 55 along the inner wall of the installation groove 54 to telescope, horizontal forces are generated, changing the width of the flow guiding member composed of the flow guiding block 53 and the flow guiding shell 55 to balance the water flow distribution.

[0059] Among them, to make the flow guiding member generate a driving force to drive the flow guiding shell 55 to slide along the inner wall of the installation groove 54, facilitating the adjustment of the width between the flow guiding block 53 and the flow guiding shell 55, it is necessary to continue to disclose the specific structure of the flow guiding member. Therefore, as Figure 8 shown, a group of electric telescopic rods 56 are fixedly arranged at the bottom of the installation groove 54, and the number of this group of electric telescopic rods 56 is at least two;

[0060] The axis of the electric telescopic rod 56 is perpendicular to the axes of the first rotating shaft 51 and the second rotating shaft 52;

[0061] Horizontal forces are generated through the telescoping of the electric telescopic rod 56 itself. As Figure 9As shown, it drives the flow guide shell 55 to slide inside the installation groove 54, thereby flexibly changing the width of the flow guide member composed of the flow guide block 53 and the flow guide shell 55 to balance the water flow distribution.

[0062] Among them, to enable the first rotating shaft 51, the second rotating shaft 52, the flow guide block 53 and the flow guide shell 55 to be subjected to axial forces and rotate within a set angle to change the magnitude and direction of the water flow, the specific structure of the transmission part 6 needs to be disclosed. Therefore, as Figure 2 shown, the transmission part 6 includes a rotating ring 61 which is rotatably arranged on the top of the outer shell 4 and is connected to the power part 7;

[0063] The axis of the rotating ring 61 coincides with the axis of the hub 1;

[0064] The power part 7 operates to drive the rotating ring 61 to reciprocate within a set angle to generate an axial force. The transmission part 6 divides the primary axial force generated by the rotating ring 61 into secondary axial forces in multiple directions to drive the first rotating shaft 51, the second rotating shaft 52, the flow guide block 53 and the flow guide shell 55 to rotate within a set angle, thereby achieving the purpose of adjusting the magnitude and direction of the water flow.

[0065] Among them, to enable the transmission part 6 to disperse the primary axial force into multiple secondary axial forces, drive multiple first rotating shafts 51 to rotate, and further drive the flow guide block 53 and the flow guide shell 55 to rotate within a set angle, the specific structure of the transmission part 6 needs to be further disclosed. Therefore, as Figure 2 shown, a plurality of first transmission bars 62 are hinged on the outer wall of the rotating ring 61. One end of the first transmission bar 62 away from the rotating ring 61 is hinged with a second transmission bar 63. One end of the second transmission bar 63 away from the first transmission bar 62 is fixedly connected to the top end of the first rotating shaft 51;

[0066] A plurality of first transmission bars 62 and second transmission bars 63 are both annularly distributed;

[0067] The power part 7 drives the rotating ring 61 to rotate within a set angle, and then drives a plurality of first transmission bars 62 to move and rotate along a set track, and then drives the second transmission bar 63 to rotate around the first rotating shaft 51, and then drives the first rotating shaft 51, and then drives the flow guide block 53 and the flow guide shell 55 to rotate around the first rotating shaft 51 to change the water flow direction and magnitude and balance the water flow distribution.

[0068] Among them, to enable the power part 7 to drive the rotating ring 61 to rotate within a set angle to generate a primary axial force, and through the transmission action of the first transmission bar 62 and the second transmission bar 63, divide the primary axial force into multiple secondary axial forces to drive the first rotating shaft 51, the flow guide block 53 and the flow guide shell 55 to rotate, the specific structure of the power part 7 needs to be disclosed. Therefore, as Figure 2As shown in the figure, both power units 7 include fixed blocks 71. The bottoms of the two fixed blocks 71 are respectively and fixedly arranged at both ends of the top of the rotating ring 61. Connecting rods 72 are hingedly arranged on the inner sides of the two fixed blocks 71. By moving the connecting rods 72 in the horizontal direction, the fixed blocks 71 are driven to rotate around the axis of the rotating ring 61, converting the horizontal acting force into the primary axial force of the rotating ring 61. Through the transmission of the first transmission bar 62 and the second transmission bar 63, the primary axial force is divided into multiple secondary axial forces to drive the first rotating shaft 51, the flow guiding block 53 and the flow guiding shell 55 to rotate, thereby changing the flow direction and magnitude of the water flow.

[0069] Among them, to make the connecting rod 72 move in the horizontal direction to generate a horizontal force and convert the horizontal force into the primary axial force of the rotating ring 61, it is necessary to further disclose the specific structure of the power unit 7 and explain the structure of the power unit 7 that provides the driving force. Therefore, as Figure 2 shown in the figure, both power units 7 further include cylinders 73. The output ends of the two cylinders 73 are respectively hinged to one end of the two connecting rods 72. By the telescopic movement of the cylinders 73 themselves, a horizontal force is generated. As Figures 4-5 shown in the figure, the connecting rod 72 is driven to move in the horizontal direction, and then the fixed block 71 is driven to rotate around the axis of the rotating ring 61, and then the rotating ring 61 is driven to rotate to generate a primary axial force. Through the transmission of the first transmission bar 62 and the second transmission bar 63, multiple secondary axial forces are generated, and then the corresponding first rotating shafts 51 are respectively driven to rotate, and then the flow guiding block 53 and the flow guiding shell 55 are driven to rotate to adjust the flow direction and magnitude of the water flow.

[0070] In summary, the overall working principle of the present invention is as follows:

[0071] When the runner is installed in the water turbine, the runner can be rotated to generate electricity. As for how the main shaft 8 is connected to the power generation device (the power generation device includes structures such as a stator and a rotor, and the rotor rotates to generate electricity), these are all prior arts and will not be elaborated here. And when the water flow impacts the leading edge of the blade 2, the water flow impacts in the V-shaped flow guiding groove 3. The V-shaped flow guiding groove 3 divides the water flow into multiple laminar micro-jets, reducing the local flow velocity gradient at the leading edge stagnation point, and a low-pressure vortex is formed in the V-shaped flow guiding groove by the laminar micro-jets, and the low-pressure vortex can adsorb cavitation nuclei;

[0072] When it is necessary to adjust the flow direction and magnitude of the water flow entering the housing 4, the hub 1 and the blade, the cylinder 73 is started. The cylinder 73 telescopic movement itself generates a horizontal force, driving the connecting rod 72 to move in the horizontal direction, and then driving the fixed block 71 to rotate around the axis of the rotating ring 61, and then driving the rotating ring 61 to rotate to generate a primary axial force. Through the transmission of the first transmission bar 62 and the second transmission bar 63, multiple secondary axial forces are generated, and then the corresponding first rotating shafts 51 are respectively driven to rotate, and then the flow guiding block 53 and the flow guiding shell 55 are driven to rotate to adjust the flow direction and magnitude of the water flow;

[0073] When it is necessary to adjust the width of the flow deflector, the electric telescopic rod 56 is activated. The electric telescopic rod 56 expands and contracts itself to generate a horizontal force, driving the flow deflector housing 55 to slide inside the installation groove 54, thereby flexibly changing the width of the flow deflector composed of the flow deflector block 53 and the flow deflector housing 55 to balance the water flow distribution.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency water turbine runner with high cavitation resistance, comprising a hub (1), a plurality of blades (2) being fixedly arranged on the inner side of the hub (1), the plurality of blades (2) being distributed in an annular shape, characterized in that: The leading edges of the plurality of blades (2) are each provided with two groups of V-shaped flow guide grooves (3) to adapt to the radial flow velocity gradient, divide the mainstream into multiple laminar microjets, and form a low-pressure vortex. A housing (4) is installed outside the hub (1) and the plurality of blades (2). The inner side of the housing (4) is provided with multiple flow guide parts (5) for changing the size and direction of the water flow. The flow guide parts (5) are driven by an axial force to rotate and generate a bidirectional horizontal force, and are extended or contracted to extend or contract to balance the water flow distribution. The top of the housing (4) is provided with multiple transmission parts (6) for transmitting the axial force. The transmission parts (6) are driven by the axial force to rotate and are equally dispersed and form multiple driving forces to drive themselves to rotate, thereby providing an axial force for the rotation of the flow guide parts (5). The top of the transmission part (6) is symmetrically provided with two power parts (7) for generating horizontal force. The two power parts (7) are provided with two symmetrical power sources, and are horizontally extended and twisted at two positions to convert the horizontal force into an axial force.

2. The high-efficiency water turbine runner with high cavitation resistance according to claim 1, characterized in that: The hub (1) is fixedly mounted on the main shaft (8), and the axis center lines of the hub (1) and the plurality of blades (2) coincide with the axis center line of the main shaft (8).

3. The high-efficiency water turbine runner with high cavitation resistance according to claim 2, characterized in that: The V-shaped guide grooves (3) in one group of the V-shaped guide grooves (3) close to the wheel hub (1) are evenly distributed and dense, while the V-shaped guide grooves (3) in another group of the V-shaped guide grooves (3) far from the wheel hub (1) are evenly distributed and sparse.

4. The high cavitation resistance and high efficiency water turbine runner according to claim 1, characterized in that: The plurality of flow guide parts (5) each comprises a first rotating shaft (51), the top ends of the plurality of first rotating shafts (51) each pass through the housing (4) and are connected to the transmission part (6), the bottom ends of the plurality of first rotating shafts (51) each are fixedly provided with a flow guide member via a first bolt, the bottom ends of the flow guide member each are fixedly provided with a second rotating shaft (52) via a second bolt, and the bottom ends of the plurality of second rotating shafts (52) each are rotatably connected to the inner wall of the housing (4); The axis of the first rotating shaft (51) coincides with the axis of the second rotating shaft (52).

5. The high-efficiency water turbine runner with high cavitation resistance according to claim 4, characterized in that: The guide member comprises a guide block (53), the top end of the guide block (53) being fixedly connected to the bottom end of the first rotating shaft (51) by a first bolt, the bottom end of the guide block (53) being fixedly connected to the top end of the second rotating shaft (52) by a second bolt, and mounting grooves (54) being symmetrically provided on both sides of the guide block (53), and a guide shell (55) being slidably provided on the inner wall of the mounting groove (54).

6. The high cavitation resistance and high efficiency water turbine runner according to claim 5, characterized in that: A group of electric telescopic rods (56) is fixedly arranged at the bottom of the installation slot (54), and the number of the electric telescopic rods (56) in the group is at least two; The axis of the electric telescopic rod (56) is perpendicular to the axes of the first rotating shaft (51) and the second rotating shaft (52).

7. The high-efficiency water turbine runner with high cavitation resistance according to claim 6, characterized in that: The transmission part (6) comprises a rotating ring (61), wherein the rotating ring (61) is rotatably arranged on the top of the housing (4) and is connected to the power part (7); The axis of the rotating ring (61) coincides with the axis of the wheel hub (1).

8. The high cavitation resistance and high efficiency water turbine runner according to claim 7, characterized in that: The outer wall of the rotating ring (61) is hingedly provided with a plurality of first transmission bars (62); one end of the first transmission bar (62) away from the rotating ring (61) is hingedly provided with a second transmission bar (63); one end of the second transmission bar (63) away from the first transmission bar (62) is fixedly connected to the top end of the first rotating shaft (51); The plurality of first transmission bars (62) and second transmission bars (63) are all distributed in a ring shape.

9. The high cavitation resistance and high efficiency water turbine runner according to claim 8, characterized in that: The two power parts (7) each comprise a fixed block (71), the bottoms of the two fixed blocks (71) being respectively fixedly arranged at two ends of the top of the rotating ring (61), and the inner sides of the two fixed blocks (71) are both hingedly provided with a connecting rod (72).

10. The high-efficiency water turbine runner with high cavitation resistance according to claim 9, characterized in that: The two power units (7) also include a cylinder (73), and the output ends of the two cylinders (73) are respectively hinged to one end of the two connecting rods (72).

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