Self-adaptive spiral flow power generation device with damping vortex lines

Abstract

The invention relates to a self-adaptive spiral flow power generation device with damping vortex lines, and belongs to the technical field of hydroelectric power generation equipment. The device comprises a base fixedly arranged on a riverbed or seabed base; the stand column is of a cylindrical structure and is arranged in the center of the base, and right-handed damping vortex lines are annularly arranged on the incident flow surface of the stand column at equal intervals; the stand column is connected with a flow guide cover through a bearing platform, and the flow guide cover is of a variable-diameter round pipe structure and is coaxially provided with a flange, a contraction section, a diffusion section and a tail edge in the water flow direction. Threaded fins are arranged on the inner wall of the flow guide cover in the circumferential direction, and the generator is also located in the flow guide cover. A rudder is arranged outside the fairing, the whole rudder is of a wing-shaped structure and comprises a front rudder and tail rudders, all the tail rudders play a synergistic role through a connecting rod mechanism, the geometric attack angle of the fairing is automatically adjusted under the main flow velocity potential difference, the fairing is made to directly face the main flow all the time, and therefore the power generation efficiency and the overall performance of the device are improved. The device is suitable for being applied to water bodies of oceans, inland lakes, reservoirs and parks, and power is generated through water body flowing.

Description

Technical Field

[0001] The present invention relates to ocean current energy or river energy power generation equipment, in particular to a generator device capable of utilizing ocean current energy or river energy to realize power supply, belonging to the technical field of hydroelectric power generation equipment. Background Art

[0002] Ocean current energy, as a renewable energy, has a higher energy density than wind energy and solar energy, about 4 times that of wind energy and 30 times that of solar energy. It has abundant reserves and huge development prospects. It takes the form of tidal energy and tidal current energy. It mainly converts kinetic energy into other forms of energy under the action of gradient differences caused by many factors. It is relatively stable. Although the scale of river energy is relatively small, it also has the dual advantages of being renewable and environmentally friendly. River energy mainly comes from the flow of water in rivers, inland lakes and reservoirs. Similar to ocean current energy, its energy mainly comes from the kinetic energy and potential energy of water flow, which converts kinetic energy and potential energy into other forms of energy.

[0003] Mainstream hydropower development still relies on building dams to store water and using water level differences to generate electricity, but there are many problems such as soil erosion, land acquisition and resettlement, international river disputes, long construction period, and high construction and operation management costs. Therefore, in order to achieve efficient use of water resources, there is an urgent need for energy transformation and upgrading methods that have a short construction period, low cost and are environmentally friendly.

[0004] In recent years, a large number of ocean current power generation equipment have appeared, mainly including buoy type and fixed type. Among them, the buoy type mostly adjusts the geometric angle of attack of the device according to the wave and water flow state to obtain higher power generation efficiency, but the buoy located on the waterway has a great impact on shipping, and there are factors such as inconvenience in power transmission, operation and maintenance. The fixed type mostly connects the base and the power generation device through a column, but the column is mostly an integrated structure, the slewing support of the power generation device is not considered, and the column frontal surface is smooth, and the structural fatigue and resonant vibration caused by the periodic shedding of the Karman vortex street are not considered; in addition, in order to obtain higher power generation efficiency, a guide tail is fixed at the tail of the generator. Its form is similar to the tail rudder of a wind turbine. It is generally a combination of a long thin rod and a rudder, so as to adjust the generator set diversion inlet to face the incoming flow direction according to the angle between the inflow and the generator set, but the density of water is greater than that of air, and it is easy to cause the thin rod to break and damage if it is connected to the rudder by a single long thin rod. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide an adaptive spiral flow power generation device with damping vortex lines which has a simple structure, good reliability and high power generation efficiency.

[0006] In order to achieve the above-mentioned object, the present invention discloses an adaptive spiral flow power generation device with damping vortex lines.

[0007] An adaptive spiral flow power generation device with damping vortex lines, comprising:

[0008] A base, used to fix the power generation device to the riverbed or seabed substrate;

[0009] A column is fixed on the base, and damping vortex lines are equidistantly arranged on the flow-facing surface of the column;

[0010] The base is connected to the column at the lower end and the fairing at the upper end. The base can rotate horizontally relative to the column.

[0011] The guide cover is a variable diameter circular tube structure, with a flange, a contraction section, a diffusion section and a trailing edge coaxially arranged along the water flow direction;

[0012] The threaded fin is arranged on the inner wall of the air deflector in an upward direction and passes through the flange of the air deflector to the end of the diffuser section;

[0013] A generator set is located in the diffuser section of the shroud;

[0014] The rudder is arranged outside the end of the fairing and cooperates with the support to make the fairing rotate in a plane, automatically adjusting the geometric angle of attack of the fairing so that it always faces the mainstream.

[0015] Preferably, the column is a cylindrical structure fixed at the geometric center of the base; the damping vortex line is a uniformly arranged right-handed vortex line protruding from the surface of the column, extending from the top of the column's frontal surface to the bottom of the frontal surface. This disturbs the flow trajectory of the water flowing around the column, preventing it from forming a vortex with a stable frequency, thereby disrupting the periodicity of the Karman vortex street, increasing energy dissipation, reducing the impact of pulsation, and avoiding destructive vortex-induced vibration caused by matching the frequency of the power generation device itself; at the same time, the damping vortex line as a spoiler structure can reduce the horizontal and vertical propagation of the horseshoe vortex around the column and the shear stress of the bed surface, avoid the scouring of the base foundation by the water flow, and thus obtain a better scouring protection effect, so as to achieve a comprehensive protection effect on this power generation device.

[0016] Preferably, the lower part of the pedestal is an inward-sunk cylindrical groove, in which a slewing bearing is nested. The slewing bearing is connected to the convex shaft at the top of the column, and slewing bearing sealing plates are provided at both ends of the slewing bearing; the upper part of the pedestal is connected to the diffusion section of the guide cover, the connection point is concave, and it is a gradually expanding partial cone along the direction of water flow, and the intersection line of the notches is a parabola of the opening along the direction of water flow.

[0017] Preferably, the flange is the inlet of the fairing, the inner edge wall shrinks toward the axis side, and the outer edge wall expands toward the side away from the axis; the contraction section is a trumpet-shaped structure that shrinks along the water flow direction, and the inner and outer walls shrink toward the axis side with the same function curve; the diffusion section is a gradually expanding cup-shaped structure, and the inner and outer wall surfaces are straight lines parallel to each other; the trailing edge is a tip wing-shaped structure with staggered contraction of the inner and outer walls. The variable diameter circular tube structure composed of the four is used to "cut" the water flow along the flow direction, and "straighten" the water flow flowing into the fairing to reduce resistance loss.

[0018] Preferably, the angle of the contraction wall surface of the inner edge of the flange along the water flow direction varies in the range of 90° to 15.8°, the angle of the expansion wall surface of the outer edge along the water flow direction varies in the range of 90° to 0°, the length of the flange along the water flow direction is 2 / 25 of the total length of the fairing, and the shrinkage rate of the cross-section of the inner wall of the flange is 23.68%; the contraction section is adjacent to the flange, and the end is the point where the hydraulic radius of the inner cavity of the fairing is the smallest. The length of the contraction section along the water flow direction is 6 / 25 of the total length of the fairing, and the shrinkage rate of the cross-section of the contraction section is 35.86%; the diffusion angle of the diffusion section is 5°, the length of the diffusion section along the water flow direction is 12 / 25 of the total length of the fairing, and the area expansion ratio is 1:1.4; the angle of the inner wall surface of the trailing edge along the water flow direction varies in the range of 3.2° to 9.5°, the angle of the outer wall surface along the water flow direction varies in the range of 6.1° to 19.5°, and the length of the trailing edge along the water flow direction is 1 / 5 of the total length of the fairing.

[0019] Preferably, the threaded fins are right-handed protrusions arranged on the inner wall of the fairing, and the threaded fins are evenly distributed and penetrate the flange of the fairing to the end of the diffuser. The water flowing through the fairing is forced to obtain rotational power under the action of the internal threaded fins, generating a non-uniform internal vortex of forced swirl, increasing the turbulence of the fluid flow, which is essentially a spiral flow state formed by the superposition of a straight pipe flow and a forced vortex. The forced spiral flow is maintained by the spiral blades fixed on the generator to prevent the spiral flow at the blades from attenuating.

[0020] Preferably, the generator set comprises blades, a generator, a generator frame and positioning bolts, wherein the generator frame is fixed on the diffuser section of the guide cover, positioning bolts are arranged on the generator frame for fixing the generator, and the blades are connected to the rotor of the generator.

[0021] Preferably, a cable is led out from the generator, and the power generated by the power generation device is connected to an onshore power storage room or a municipal power supply cable through the cable.

[0022] Preferably, the rudder is a wing-shaped structure, consisting of multiple groups of front rudders and tail rudders, the front rudder is arranged on the top of the outer wall surface at the end of the diffuser section of the fairing, the tail rudder is inserted into the rear end of the front rudder, and the tail rudder can swing relative to the front rudder. Each group of tail rudders is connected by a connecting rod mechanism. The swing of the tail rudder and the synergistic effect of the connecting rod mechanism form a torque that causes the power generation equipment to rotate horizontally as a whole, so as to adjust the optimal geometric angle of attack of the fairing until the power generation device is facing the incoming flow direction and the velocity potential difference of the mainstream flowing through the left and right outer wall of the fairing is reduced, and the rotation stops.

[0023] Preferably, the connecting rod mechanism includes a fixed axis, a directional connecting rod, and a fixed connecting rod. Adjacent tail rudders are connected via the directional connecting rod and the fixed connecting rod. The tail rudder is provided with a fixed axis. Both ends of the directional connecting rod and the fixed connecting rod are connected to the fixed axis. The directional connecting rod passes through the belly notch of the fixed connecting rod to form a crossed X shape. A plurality of adjacent X-shaped structures are connected in sequence to form a connecting rod mechanism. Under the velocity potential difference when water flows through the left and right sides of the tail rudder, the fixed connecting rod connected to the fixed axis pushes the tail rudder to generate a deflection effect in the same direction within the notch range at both ends of the directional connecting rod, and the connecting rod mechanism superimposes the deflection.

[0024] Beneficial effects:

[0025] The present invention arranges damping vortex lines on the columns as spoiler structures to avoid scouring of the base foundation by water flow, thereby obtaining a better scouring protection effect, so as to achieve a comprehensive protection effect for the power generation device; the deflector is arranged as a variable diameter circular tube structure and threaded ribs are arranged inside it, so that the water flow obtains rotational power and the turbulence of the water flow is increased; the rudder is arranged to make the torque of the power generation equipment rotate horizontally as a whole, forcing the power generation equipment as a whole to rotate in a plane, so as to adjust the geometric attack angle of the deflector and obtain the best energy utilization rate, thereby significantly improving its power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional axonometric diagram of the present invention.

[0027] Figure 2 It is the front view of the present invention.

[0028] Figure 3 It is a top view of the present invention.

[0029] Figure 4 It is a schematic diagram of the partial structure of the base and the column of the present invention.

[0030] Figure 5 It is a schematic diagram of the support structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the air guide cover and threaded fins of the present invention.

[0032] Figure 7 It is a schematic diagram of the structure of the power generation system of the present invention.

[0033] Figure 8 It is a schematic diagram of the rudder structure of the present invention.

[0034] Fig. 9 It is a schematic diagram of the connecting rod structure of the present invention.

[0035] Legend: 1: Base. 2: Column; 21: Damping vortex line; 22: Protruding shaft. 3: Capping platform; 31: Slewing bearing; 32: Slewing bearing cover plate. 4: Fairing; 41: Flange; 42: Converging section; 43: Diffuser section; 44: Trailing edge. 5: Threaded rib. 6: Generator set device; 61: Generator blade; 62: Generator; 63: Generator frame; 64: Positioning bolt. 7: Rudder; 71: Front rudder; 711: Pin; 712: Rudder plate bearing cover plate; 713: Rudder plate bearing; 72: Tail rudder; 721: Fixed shaft; 722: Direction connecting rod; 723: Fixed connecting rod; 724: Fixed bolt. 8: Cable. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example

[0038] like Figure 1-3 As shown, an adaptive spiral flow power generation device with damping vortex lines comprises:

[0039] A base 1, used to fix the power generation device on a riverbed or seabed substrate;

[0040] A column 2 is fixed on the base 1, and damping vortex lines 21 are equidistantly arranged on the flow-facing surface of the column 2;

[0041] The support platform 3 is connected to the column 2 at the lower end and the air guide cover 4 at the upper end. The support platform 3 can rotate horizontally relative to the column 2;

[0042] The deflector 4 is a variable diameter circular tube structure, and a flange 41, a contraction section 42, a diffusion section 43 and a trailing edge 44 are coaxially arranged along the water flow direction;

[0043] The threaded fin 5 is arranged on the inner wall of the air deflector 4 in an annular direction and passes through the flange 41 of the air deflector 4 to the end of the diffuser section 43;

[0044] The generator set 6 is located in the diffuser section 43 of the fairing 4;

[0045] The rudder 7 is arranged outside the end of the fairing 4, and cooperates with the support platform 3 to make the fairing 4 rotate in a plane, and automatically adjusts the geometric angle of attack of the fairing 4 so that it always faces the mainstream.

[0046] Specifically, Figure 4As shown, the column 2 is a cylindrical structure fixed at the geometric center of the base 1; the damping vortex line 21 is a spoiler protection structure protruding from the surface of the column 2, which can be a triangular cone. The damping vortex line 21 extends from the top of the frontal surface of the column 2 to the bottom of the frontal surface, and is a uniformly arranged right-handed vortex line. On the one hand, it changes the geometric structure of the frontal surface of the cylindrical column to disrupt the flow trajectory of the water body flowing around the column, so that it cannot form a vortex with a stable frequency, thereby disrupting the periodicity of the Karman vortex street, increasing energy dissipation, reducing the impact of pulsation, and avoiding destructive vortex-induced vibration caused by matching the frequency of the power generation device itself; on the other hand, the damping vortex line as a spoiler structure can reduce the horizontal and vertical propagation of the horseshoe vortex around the column and the shear stress of the bed surface, avoid the scouring of the base foundation by the water flow, and thus obtain a better scouring protection effect, so as to improve the safety and stability of the power generation device, and then improve its durability to extend its service life. A convex shaft 22 is also provided on the top of the column 2 for connecting with the base 3.

[0047] like Figure 5 As shown, the lower part of the support platform 3 is an inward-recessed cylindrical groove, in which a slewing bearing 31 is embedded. The slewing bearing 31 is screwed to the convex shaft 22 at the top of the column 2, and slewing bearing sealing plates 32 are provided at both ends of the slewing bearing 31. Among them, the sealing plate fixed to the top of the groove is used to cushion the slewing bearing 31 to reduce the direct effect on the slewing bearing 31 caused by vibration and impact; the bottom sealing plate is used as a closed sealing plate to isolate the water in the working environment of this device and protect the bearing from water erosion. The upper part of the support platform 3 is connected to the diffusion section 43 of the guide cover 4, and a fixed connection method such as welding can be used. The connection is concave and gradually expands in the direction of water flow. The intersection line of the notch is a parabola of the opening along the direction of water flow.

[0048] like Figure 6As shown, the inlet of the deflector 4 is a flange 41. The inner wall surface of the flange 41 shrinks toward the axis along the water flow direction, and the angle of the shrinking wall surface along the water flow direction varies between 90° and 15.8°. The outer wall surface expands toward the side away from the axis, and the angle of the expanding wall surface along the water flow direction varies between 90° and 0°. The length of the flange 41 along the water flow direction is 2 / 25 of the total length of the deflector 4, and the cross-sectional shrinkage rate of the inner wall of the flange 41 is 23.68%. The shrinking section 42 is adjacent to the end of the flange 41 and is a trumpet-shaped structure that shrinks along the water flow direction. The inner and outer walls shrink toward the axis side with the same function curve, and the end is the minimum hydraulic radius of the inner cavity of the deflector. The length of the shrinking section 42 along the water flow direction is 6 / 25 of the total length of the deflector 4, and the cross-sectional shrinkage rate of the shrinking section 42 is 35.86%. The diffuser 43 is a gradually expanding cup-shaped structure along the water flow direction, with the inner and outer wall surfaces being parallel straight lines, the diffusion angle being 5°, the length of the diffuser 43 along the water flow direction being 12 / 25 of the total length of the fairing 4, and the area expansion ratio being 1:1.4; a generator frame 63 is fixed on the diffuser 43, a cable 8 is led out from the generator 62, and the generator 62 is fixed to the generator frame 63 by means of positioning bolts 64. The trailing edge 44 is a tip airfoil structure with staggered contraction of the inner and outer walls, so as to improve the flow performance of the fluid when it flows out of the fairing, so that the fluid flows out quickly, the angle of the inner wall surface along the water flow direction varies between 3.2° and 9.5°, the angle of the outer wall surface along the water flow direction varies between 6.1° and 19.5°, and the length of the trailing edge 44 along the water flow direction is 1 / 5 of the total length of the fairing 4. The coordinate parameters x and y of the points on the two-dimensional section of the fairing in rectangular coordinates are shown in Table 1.

[0049] Table 1 Coordinates of points on the two-dimensional section of the fairing

[0050]

[0051]

[0052]

[0053]

[0054] The threaded fins 5 are right-handed protrusions arranged on the inner wall of the fairing 4 in an annular direction, the protrusion direction is one side of the axis of the fairing 4, and the shape is a quadrangular cone. The threaded fins 5 are evenly distributed and penetrate the flange 41 of the fairing 4 to the end of the diffusion section 43. The evenly arranged right-handed threaded fins force the water flowing through the fairing 4 to obtain rotational power under the action of the internal threaded fins, generating a non-uniform internal vortex of forced swirl, so as to increase the turbulence of the fluid flow and reduce the diffusion angle of the water flow. Its essence is the superposition of the straight pipe flow and the forced vortex, and the spiral flow state is formed. The forced spiral flow is maintained by the spiral blades 61 fixed on the generator 62 to maintain the spiral flow at the blade without attenuation.

[0055] like Figure 7 As shown, the generator set 6 includes blades 61, a generator 62, a generator frame 63 and positioning bolts 64, wherein the generator frame 63 is fixed on the diffuser section 43 of the guide cover, and positioning bolts 64 are arranged thereon for fixing the generator 62, and the blades 61 are connected to the rotor of the generator 62. A cable 8 is led out from the generator 62, and the power generated by the power generation device is connected to the shore power storage room or the municipal power supply cable through the cable 8.

[0056] The rudder 7 is a wing-shaped structure, consisting of a plurality of groups of front rudders 71 and tail rudders 72. The front rudder 71 is arranged at the top of the outer wall surface at the end of the diffuser section 43 of the fairing, and the tail rudder 72 is inserted at the rear end of the front rudder 71. The tail rudder 72 can swing relative to the front rudder 71. Each group of tail rudders 72 is connected by a connecting rod mechanism. The swing of the tail rudder 72 and the synergistic effect of the connecting rod mechanism form a torque that causes the power generation equipment to rotate horizontally as a whole, so as to adjust the optimal geometric angle of attack of the fairing 4.

[0057] Specifically, in this embodiment, if Figure 8-9 As shown, there are three groups of front rudders 71 and tail rudders 72, which are arranged symmetrically along the axis of the power generation device, and the top planes are all at the same horizontal height. The two-dimensional effective plane area ratio is 1:2.625, and the chord length ratio is 1:2.8. The front rudder 71 is fixedly set on the top of the outer wall surface at the end of the deflector diffuser section 43, and the trailing edge is tangent to the end of the deflector diffuser section 43; the overall height of the front rudders 71 on the left and right sides is slightly higher than the front rudder 71 located at the axis of this device, among which the bottom of the front rudders 71 on the left and right sides is a wedge-shaped plane that presents the same "diffusion" trend as the deflector diffuser section 43, and the bottom of the front rudder 71 at the axis is a plane, and the rest of the geometric information is completely consistent. The length ratio of the front rudder 71 and the diffuser section 43 of the guide cover along the water flow direction is 1:2.21. The front rudder 71 as a whole is an asymmetric groove wing-shaped structure biased toward one side of the upper part of the device, which is used to reserve the position space required for the swing of the rear rudder 72; cylindrical slots are provided at both ends of the groove, the top of the slot passes through the front rudder 71, and the depth is symmetrical on both sides of the center line of the groove, which is used to fix the rudder plate bearing 713, the pin 711 and connect the tail rudder 72. The tail rudder 72 is connected to the front rudder 71 through the pin 711. The geometric information of each set of tail rudders 72 is completely consistent. The walls on both sides are wing-shaped structures that shrink symmetrically toward the center line along the direction of the water flow. The main structure of the vertical surface of the tail rudder 72 presents a strictly symmetrical "convex" structure. A cylindrical slot hole is set at an appropriate position of the convex plane, and the hole diameter is consistent with the outer diameter of the pin 711. Two cylindrical fixed shafts 721 are set on the top plane of the tail rudder 72, and a threaded buckle is set on the top to fix the connecting rod structure thereon. The fixed shafts 721 are respectively located at 1 / 5 and 2 / 5 of the top plane of the tail rudder 72 along the water flow direction.

[0058] In order to enable the tail rudder 72 to rotate in a plane, a set of rudder plate bearings 713 are provided at appropriate positions on the latch pin 711, and their outer diameters are consistent with the outer diameters of the cylindrical slots on the front rudder 71, and their inner diameters are consistent with the outer diameters of the latch pin 711; in order to cushion and protect the bearings, two sets of annular rudder plate bearing sealing plates 712 are provided at each bearing, and their inner and outer ring diameters are consistent with the aforementioned latch pin 711 and the apertures of the cylindrical slots.

[0059] The connecting rod mechanism cooperates with the direction connecting rod 722 and the fixed connecting rod 723 through the fixed shaft 721 located on the rudder 72, and two connecting rods are provided for each. The two connecting rods are arranged in an "X" shape on the plane, and the two have the same width. The direction connecting rod 722 is a rounded rectangle on the plane, and through-type slots are symmetrically arranged at both ends of the axis with the center axis of the connecting rod as the axis to provide the position space required for the translation of the connecting rod. The center distance of the slot is 3 times the outer diameter of the cylindrical fixed shaft 721, and the slot width is consistent with the outer diameter of the cylindrical fixed shaft 721; the middle part of the direction connecting rod 722 passes vertically through the reserved slot on the belly of the fixed connecting rod 723. The fixed link 723 is a rounded rectangle in plane, and its thickness is twice that of the direction link 722. Both ends of the fixed link 723 are fixed on the fixed shaft 721 through reserved through-type circular holes, and the reserved circular hole diameter is consistent with the outer diameter of the fixed shaft 721. Grooves are set at both ends of the vertical surface of the fixed link 723, and the length of the groove is consistent with the length of the groove at the end of the direction link 722. The bottom of the groove is oblique, oblique to the side of the direction link 722; an inclined rectangular notch is reserved at the abdomen position on the vertical surface of the fixed link 723, oblique to the side of the direction link 722, for the direction link 722 to be inserted, and the oblique length of the notch is 3 times the length of the horizontal intersection line of the direction link 722 at this position, and the vertical height of the notch is 1.4 times the thickness of the direction link 722. After the various components of the link mechanism are installed, the bolt 724 is finally fixed to limit its vertical movement.

[0060] When the water flows through the left and right sides of the tail rudder 72, due to the difference in velocity potential of the water flows on the left and right sides, the tail rudder 72 will swing in the opposite direction to the water flow; when the velocity potential of the water flow flowing through the left side of the tail rudder 72 is greater than the velocity potential of the water flow flowing through the right side of the tail rudder 72, the tail rudder 72 close to the left side generates a rightward deflection force under the action of the larger velocity potential, and under the action of this deflection force, the fixed connecting rod 723 connected to the fixed shaft 721 "pushes" the remaining two tail rudders 72 to generate a deflection effect in the same direction within the range defined by the notches at both ends of the direction connecting rod 722, and then the connecting rods are combined into a connecting rod mechanism to exert a synergistic effect of "exerting force" in the same direction, and further superimpose this deflection force to form a torque that causes the power generation equipment to rotate horizontally as a whole, so as to adjust the optimal geometric attack angle of the fairing, until the power generation device is facing the incoming flow direction and the velocity potential difference of the left and right mainstreams flowing through the outer wall of the fairing is reduced, the rotation stops. When the velocity potential of the water flowing through the right side of the rudder 72 is greater than the velocity potential of the water flowing through the left side of the rudder 72, the rotation direction of the rudder 72 is opposite to the above. Finally, the movement of the direction connecting rod 722 and the fixed connecting rod 723 in the vertical direction is limited by the fixing bolt 724, so that it is limited to horizontal rotation within the range of the notches at both ends of the direction connecting rod 722.

[0061] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make modifications, substitutions and deformations within the technical scope disclosed by the present invention without departing from the spirit and principles of the present invention.

Claims

1. An adaptive spiral flow power generation device with damping vortex, characterized in that: include: A base (1) for fixing the power generation device on a riverbed or seabed substrate; A column (2) is fixed on the base (1), and damping vortex lines (21) are equidistantly arranged in an annular direction on the flow-facing surface of the column (2); A support platform (3), the lower end of which is connected to the column (2), and the upper end of which is connected to the air guide cover (4), and the support platform (3) can rotate horizontally relative to the column (2); The flow guide cover (4) is a variable diameter circular tube structure, and a flange (41), a contraction section (42), a diffusion section (43) and a trailing edge (44) are coaxially arranged along the water flow direction; The threaded fin (5) is arranged on the inner wall of the air deflector (4) in an annular direction and passes through the flange (41) of the air deflector (4) to the end of the diffuser section (43); A generator set (6) is located in the diffuser section (43) of the shroud (4); The rudder (7) is arranged outside the end of the fairing (4) and cooperates with the support platform (3) to make the fairing (4) rotate in a plane, and automatically adjusts the geometric angle of attack of the fairing (4) so ​​that it always faces the mainstream.

2. The adaptive spiral flow power generation device with damping vortex lines according to claim 1 is characterized in that: The column (2) is a cylindrical structure fixed at the geometric center of the base (1); the damping vortex line (21) is a right-handed vortex line evenly arranged, protruding from the surface of the column (2), and extending from the top of the flow-facing surface of the column (2) to the bottom of the flow-facing surface.

3. The adaptive spiral flow power generation device with damping vortex according to claim 1, characterized in that: The lower part of the support platform (3) is an inwardly sunken cylindrical groove, in which a slewing bearing (31) is nested. The slewing bearing (31) is rotatably connected to the convex shaft (22) at the top of the column (2), and slewing bearing sealing plates (32) are provided at both ends of the slewing bearing (31); the upper part of the support platform (3) is connected to the diffusion section (43) of the guide cover (4), and the connection part is concave and gradually expands in the direction of water flow. The intersection line of the notches is a parabola of the opening along the direction of water flow.

4. The adaptive spiral flow power generation device with damping vortex according to claim 1, characterized in that: The flange (41) is the inlet of the deflector (4), the inner edge wall faces the axis side and shrinks, and the outer edge wall faces the side away from the axis and expands; the contraction section (42) is a trumpet-shaped structure that shrinks along the water flow direction, and the inner and outer walls shrink toward the axis side along the same function curve; the diffusion section (43) is a gradually expanding cup-shaped structure, and the inner and outer wall surfaces are straight lines parallel to each other; the trailing edge (44) is a tip wing-shaped structure with the inner and outer walls staggered and contracted.

5. The adaptive spiral flow power generation device with damping vortex according to claim 4, characterized in that: The angle of the inner edge contraction wall surface of the flange (41) along the water flow direction varies in the range of 90° to 15.8°, and the angle of the outer edge expansion wall surface along the water flow direction varies in the range of 90° to 0°. The length of the flange (41) along the water flow direction is 2 / 25 of the total length of the deflector (4), and the cross-sectional contraction rate of the inner wall of the flange (41) is 23.68%. The contraction section (42) is adjacent to the flange (41), and the end thereof is the point where the hydraulic radius of the inner cavity of the deflector (4) is the smallest. The length of the contraction section (42) along the water flow direction is 2 / 25 of the total length of the deflector (4). The length of the contraction section (42) is 6 / 25, and the cross-sectional contraction rate of the contraction section (42) is 35.86%; the diffusion angle of the diffusion section (43) is 5°, the length of the diffusion section (43) along the water flow direction is 12 / 25 of the total length of the guide cover (4), and the area expansion ratio is 1:1.4; the angle of the inner wall surface of the trailing edge (44) along the water flow direction varies in the range of 3.2° to 9.5°, the angle of the outer wall surface along the water flow direction varies in the range of 6.1° to 19.5°, and the length of the trailing edge (44) along the water flow direction is 1 / 5 of the total length of the guide cover (4).

6. The adaptive spiral flow power generation device with damping vortex according to claim 1, characterized in that: The threaded ribs (5) are right-handed protrusions arranged in an upward circular direction on the inner wall of the air deflector (4). The threaded ribs (5) are evenly distributed and penetrate the flange (41) of the air deflector (4) to the end of the diffuser section (43).

7. The adaptive spiral flow power generation device with damping vortex according to claim 1, characterized in that: The generator set (6) comprises blades (61), a generator (62), a generator frame (63) and positioning bolts (64), wherein the generator frame (63) is fixed on the diffuser section (43) of the guide cover, and positioning bolts (64) are arranged on the generator frame for fixing the generator (62), and the blades (61) are connected to the rotor of the generator (62).

8. The adaptive spiral flow power generation device with damping vortex according to claim 7, characterized in that: A cable (8) is led out from the generator (62), and the power generated by the power generation device is connected to an onshore power storage room or a municipal power supply cable through the cable (8).

9. The adaptive spiral flow power generation device with damping vortex lines according to claim 1, characterized in that: The rudder (7) is a wing-shaped structure, and is composed of a plurality of groups of front rudders (71) and tail rudders (72). The front rudder (71) is arranged at the top of the outer wall surface at the end of the diffuser section (43) of the fairing, and the tail rudder (72) is plugged into the rear end of the front rudder (71). The tail rudder (72) can swing relative to the front rudder (71). Each group of tail rudders (72) is connected by a connecting rod mechanism. The swing of the tail rudder (72) and the coordinated action of the connecting rod mechanism form a torque that causes the power generation equipment to rotate horizontally as a whole, so as to adjust the optimal geometric angle of attack of the fairing (4).

10. The adaptive spiral flow power generation device with damping vortex according to claim 9, characterized in that: The connecting rod mechanism comprises a fixed axis (721), a directional connecting rod (722), and a fixed connecting rod (723); adjacent stern rudders (72) are connected via the directional connecting rod (722) and the fixed connecting rod (723); the stern rudder (72) is provided with a fixed axis (721); both ends of the directional connecting rod (722) and the fixed connecting rod (723) are connected to the fixed axis (721); the directional connecting rod (722) passes through the belly notch of the fixed connecting rod (723) to form a crossed X shape; a plurality of adjacent X-shaped structures are sequentially connected to form a connecting rod mechanism; under the velocity potential difference of water flowing through the left and right sides of the stern rudder (72), the fixed connecting rod (723) connected to the fixed axis (721) pushes the stern rudder (72) to generate a deflection effect in the same direction within the notch range at both ends of the directional connecting rod (722); and the connecting rod mechanism superimposes the deflection.

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