WO2019061839A1 - Tidal water turbine having energized rotary wheel - Google Patents

Abstract

A tidal water turbine having an energized rotary wheel, comprising a flow guide cover (1), a hub (3) fixed to a rotary shaft (2), and a base impeller fixed on the hub (3), and further comprising an energized rotary wheel which has logarithmic curve spiral blades (7) each having a variable radius, the energized rotary wheel being located at an outlet end of the flow guide cover (1), the logarithmic curve spiral helical blades (7) being gradually stretched along the axial direction of the rotary shaft (2) according to a logarithmic curve spiral line, being twisted spatially and being uniformly distributed on the circumferential inner wall of the rotary shaft (2). Said water turbine has a simple structure and a high efficiency, and can be used not only as a water turbine for generating electric power from marine tidal power, but also for generating electric power in conditions of weak tidal power such as mountain areas, plains, mountain springs, and streams in small reservoirs in hilly areas.

Description

Tidal flow turbine with energizing runner Technical field

The invention belongs to the technical field of fluid machinery and hydropower engineering equipment, and in particular relates to a tidal energy turbine with an energizing runner.

Background technique

Countries in the world today have placed hydropower development at the forefront of energy development. China's total water energy resources are very rich, not only have medium and high head resources, but also low-head resources (including tidal energy) of about 0.8-100 million kilowatts. The development and utilization of new energy, especially the development and utilization of ocean energy, is extremely Development potential. The ocean current power generation relies on the impact of the sea current to make the turbine rotate at a high speed, and then drives the generator to generate electricity. It does not need a high head to create the initial pressure. The power flow can be realized only by the flow velocity of the sea current, and its economic value is very significant.

The turbine impeller is one of the most critical components of the marine tidal generator. The performance of the impeller directly affects the performance of the entire unit, and its manufacturing cost also accounts for about 20% of the entire generator set. The impeller blades of the traditional low-micro-head turbines generally adopt asymmetrically twisted tubular blades, while the marine tidal energy generating turbines mostly draw on the fan blades. The applicable conditions and operating ranges are different, the impeller structure is complex, the manufacturing cost is high, and the operating efficiency is high. Lower.

Chinese Patent Application No. 201310496139 discloses "a marine engine capable of generating a turbine impeller with a shroud", the solution comprising a rotating shaft and a hub and a blade mounted on the hub, the rotating shaft, the hub and the blade are all placed in the impeller chamber, the impeller The two ends of the chamber are the inlet side and the outlet side respectively, and the water flows from the inlet side to the outlet side in the axial direction, and the hub adopts a spherical shape to facilitate the installation of the blade, thereby improving the functional force of the blade. However, the scheme also has the following shortcomings: First, the structure of the shroud is simple, can not play a better energy-concentrating effect, directly affects economic performance; second, it belongs to a single-stage ocean current energy turbine, and the efficiency of power generation by using ocean current energy is low.

Chinese Patent Application No. 201310496522.0 discloses a two-way impeller of a turbine having a shroud for ocean current power generation, comprising a rotating shaft and a hub installed in the impeller chamber, and an "S" type blade mounted on the hub and having a number of 5-7; the impeller chamber The two sides are the inlet side and the outlet side respectively. When generating electricity in the forward direction, the water flows from the inlet side to the outlet side through the shroud. When the power is generated in reverse, the water flows axially to the inlet side through the outlet side. Although the scheme can efficiently convert sea flow energy under the flow of two-way flow, it still The following deficiencies exist: First, it belongs to a single-stage ocean current turbine, and the efficiency of using ocean current energy to generate electricity is low. Second, the turbine blade design still belongs to the traditional design theory. The airfoil is too simple to use the water body flowing through the runner. energy.

Chinese Patent Application No. 201210342709 discloses "a tidal current tidal energy turbine generator set with a shroud type elliptical trajectory, which includes a shroud, a rail bracket, an elliptical rail, a linear bearing, a guiding arm, a straight blade, etc. Although a shroud is used It has improved the energy-collecting effect of tidal energy, but it also has the following shortcomings: First, its vertical-axis blade adopts single elliptical blade design, which can not provide efficient output power; second, it belongs to single-stage ocean current turbine, which utilizes the efficiency of ocean current energy generation. Lower.

In summary, how to overcome the shortcomings of the prior art has become one of the key problems to be solved urgently in the technical field of fluid machinery and hydropower engineering equipment.

Summary of the invention:

The object of the present invention is to provide a tidal energy turbine with an energizing runner for overcoming the deficiencies of the prior art. The invention has the advantages of simple structure and high efficiency, and can be used for a marine tidal power generating turbine or in a mountainous area. Power generation is used under conditions of small tidal currents such as plains, mountain springs, and pond dams.

A tidal energy turbine with an energizing runner according to the present invention includes a shroud, a hub fixed to the rotating shaft, a foundation impeller fixed to the hub, and the rotating shaft, the hub and the base impeller are placed The shroud is characterized in that it further comprises an energizing wheel with a logarithmic curved spiral blade of variable radius, the energizing wheel is located at the outlet end of the shroud, the logarithmic curved spiral blade According to the logarithmic curve, the spiral line is gradually stretched along the axial direction of the rotating shaft, and has a space cross-twisted shape and is evenly distributed on the circumferential inner wall of the rotating shaft, and the logarithmic curve spiral of the rotating surface centering on the rotating shaft The intersection point of each section of the blade is an origin establishing coordinate system, and the logarithmic curve spiral blade is on the outer circumference of the rotating shaft, and the coordinates of the key point at the maximum radius on the section airfoil curve at different axial distances are expressed as follows. X represents the spatial abscissa value of the key point on the section airfoil curve of the logarithmic curve spiral blade, and Y represents the spatial ordinate of the key point on the section airfoil curve of the logarithmic curve spiral blade , 102cm parameter curve at the leading edge of the helical blade number of axial cross-section from the airfoil hub Table 1,

Table 1:

Serial number	X	Y	Serial number	X		Y
1	28.9772	4.8031	7	25.8547	13.5602
2	32.1969	5.3368	8	28.5861	15.0669
3	38.6362	6.4041	9	34.0488	18.0803

4	45.0756	7.4715	10	39.5116	21.0937
5	51.515	8.5388	11	44.9744	24.1071
6	57.9544	9.6062	12	50.4372	27.1205

The two curve equations after fitting are:

Logarithmic curve spiral blade left chord: y = 0.1650x + 0.0073;

The right chord of the logarithmic curve spiral blade: y = 0.5516x - 0.7018;

The parameters of the cross-sectional airfoil of the logarithmic curve spiral blade at a distance of 132 cm from the leading edge of the hub are shown in Table 2.

Table 2:

Serial number	X	Y	Serial number	X	Y
1	-82.5421	-9.6819	7	-74.9703	-28.2068
2	-77.9564	-9.144	8	-58.0275	-21.9386
3	-68.7851	-8.0682	9	-41.0848	-15.6704
4	-59.6137	-6.9925	10	-49.5561	-18.8045
5	-50.4424	-5.9167	11	-62.2632	-23.5056
6	-41.271	-4.8409	12	-36.8491	-14.1034

The two curve equations after fitting are:

Logarithmic curve spiral blade left chord: y = 0.1174x + 0.0014;

The right chord of the logarithmic curve spiral blade: y = 0.3694x - 0.4771;

See Table 3 for the parameters of the cross-sectional airfoil of the helical blade of the logarithmic curve from the leading edge of the hub at 192 cm.

table 3:

Serial number	X	Y	Serial number	X		Y
1	18.44	-55.814	7	28.439	-51.406
2	20.489	-62.015	8	31.457	-57.118
3	24.587	-74.418	9	37.494	-68.541
4	28.685	-86.821	10	43.531	-79.965
5	32.782	-99.225	11	49.569	-91.388
6	36.88	-111.628	12	55.606	-102.812

The two curve equations after fitting are:

The left chord of the logarithmic curve spiral blade: y=0.0001x ² -3.0283x+0.0087;

The right chord of the logarithmic curve spiral blade: y = -0.0001x ² -1.8885x + 2.3695.

The realization principle of the present invention is: the specific application process of the present invention is: when the water flow flows from the inlet of the shroud into the tidal energy turbine, the work is performed on the basic runner and the booster runner in turn, and then the external force is rotated, thereby driving the spindle. Rotate and then transmit the torque to the generator set connected to it to convert the tidal energy into electrical energy. Among them, the spiral blade with the logarithmic curve spiral shape can be set to different pitches according to the tidal flow velocity and adjust the spatial distortion degree; the stability of the rotation of the energizing runner is greatly ensured; After the wheel, it flows out from the outlet of the shroud. Since the energizing runner can convert the kinetic energy of the water flowing out of the base runner into the rotating mechanical energy of the runner again, the problem of multiple energy conversion of the water energy is well solved, and the output power of the tidal energy turbine is improved to enhance The efficiency of a tidal energy turbine. At the same time, the rear logarithmic spiral blade of the turbine of the present invention has a variable cross-section function in the radial direction, and the metal hinged telescopic device makes the blade radius variable, so that the flow rate at the outlet of the shroud can be adjusted, further improving the adjustment of the turbine. ability.

The significant advantages of the present invention over the prior art are:

First, the present invention provides a tidal current turbine with an energizing runner, in particular, an energizing runner is added on the basis of utilizing the tidal current of the base runner, so that the trend of the present invention is performed under the same tidal energy. The turbine's tidal current conversion rate is increased on the basis of the existing base runner, and the energy-increasing effect is remarkable, thereby improving the conversion power of the tidal energy turbine for power generation.

Secondly, the spiral blade of the present invention has a logarithmic curve spiral shape, and is gradually stretched along the axial direction of the rotating shaft to form a spatially twisted shape and uniformly distributed on the outer circumference of the rotating shaft to perform a uniform rotating motion, thereby greatly reducing hydraulic friction. Collision reduces the energy loss of the tidal current that is used again after the tidal current passes through the base runner, thereby improving the efficiency of the turbine.

Thirdly, the tidal current turbine of the present invention has good structural stability, long effective working time and high efficiency, and can be used as an upgraded product of the prior art, and is suitable for replacing various types of water turbines that use tidal energy to generate electricity in the field.

Fourth, the logarithmic curved spiral blade disposed at the rear of the tidal energy turbine of the present invention has a variable cross-sectional function in the radial direction, and uses a metal hinged telescopic device to make the logarithmic curve spiral blade radius variable, thereby making the shroud The flow at the outlet can be adjusted to further enhance the turbine's adjustment capacity.

DRAWINGS

1 is a schematic view showing the overall structure of an impeller of the present invention.

Figure 2 is a schematic illustration of the dimensional relationship of the various components of the impeller of the present invention.

Fig. 3 is a perspective view showing the structure of a logarithmic spiral blade of the present invention.

Fig. 4 is a schematic view showing the logarithmic spiral structure of the logarithmic spiral blade of the present invention.

Figure 5 is a schematic view of a tidal energy turbine runner with an energizing runner of the present invention.

Fig. 6 is a schematic cross-sectional view showing the logarithmic curve of the logarithmic airfoil of the logarithmic spiral blade of the present invention at a distance of 102 cm from the leading edge of the hub.

Fig. 7 is a schematic cross-sectional view showing the logarithmic curve of the logarithmic airfoil of the logarithmic spiral blade of the present invention at a distance of 132 cm from the leading edge axial direction of the hub.

Figure 8 is a schematic cross-sectional view of a logarithmic curved spiral blade at a 192 cm axial direction of the leading edge of the logarithmic spiral blade of the present invention from the leading edge of the hub.

The numbers in the drawings indicate: the shroud 1, the rotating shaft 2, the hub 3, the vanes 4, the inlet side 5 of the shroud, the water outlet side 6 of the shroud, the logarithmic curve spiral blade 7, and the diameter D of the impeller _0, the middle section of the shroud a diameter D _1, shroud inlet diameter D 1 _2, the shroud ₃ of the outlet diameter D 1, hub diameter D _h 3, the length L ₀ of the hub 3, the guide logarithmic curve when the spiral length of the intermediate section of the cover 1 L _1, the length of the inlet section of the shroud 1 L _2, the length of the outlet shroud 1 L _3, a logarithmic curve spiral blade 7 in its minimum radius The maximum radius _{Rmin of the} blade 7, the logarithmic curve of the helical blade 7 is in the maximum radius of the logarithmic curve, the maximum radius _{Rmax of the} helical blade 7.

Detailed ways:

The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

Example 1.

1 to 8, a tidal current turbine with an energizing runner according to the present invention includes a shroud 1, a hub 3 fixed to the rotating shaft 2, and a foundation impeller fixed to the hub 3, The rotating shaft 2, the hub 3 and the base impeller are both placed in the shroud 1, and further comprise an energizing wheel with a logarithmic curved spiral blade 7 of variable radius, the energizing wheel being located at the outlet of the shroud 1 The logarithmic curved spiral blade 7 is gradually stretched in the axial direction of the rotating shaft 2 according to the logarithmic curve spiral, and has a space intersecting twisted shape and uniformly distributed on the circumferential inner wall of the rotating shaft 2, The intersection of the respective sections of the logarithmic curve spiral blade 7 in which the rotating shaft 2 is the central rotating surface is the origin establishing coordinate system, and the logarithmic curved spiral blade 7 is on the outer circumference of the rotating shaft 2 at a different axial distance. The coordinates of the key points at the largest radius on the airfoil curve are expressed as follows, X represents the spatial abscissa value of the key point on the cross-sectional airfoil curve of the logarithmic curve spiral blade 7, and Y represents the logarithmic curve spiral blade 7 The space of the key points on the cross-section airfoil curve The ordinate value, logarithmic curve, the section airfoil of the spiral blade 7 is 102 cm away from the leading edge of the hub 3, see Table 1,

Table 1:

Serial number	X	Y	Serial number	X		Y
1	28.9772	4.8031	7	25.8547	13.5602

2	32.1969	5.3368	8	28.5861	15.0669
3	38.6362	6.4041	9	34.0488	18.0803
4	45.0756	7.4715	10	39.5116	21.0937
5	51.515	8.5388	11	44.9744	24.1071
6	57.9544	9.6062	12	50.4372	27.1205

The two curve equations after fitting are:

The left chord of the logarithmic curve spiral blade 7: y = 0.1650x + 0.0073;

The right chord of the logarithmic curve spiral blade 7: y = 0.5516x - 0.7018;

The parameters of the cross-sectional airfoil of the logarithmic curve spiral blade 7 at a distance of 132 cm from the leading edge of the hub are shown in Table 2.

Table 2:

Serial number	X	Y	Serial number	X	Y
1	-82.5421	-9.6819	7	-74.9703	-28.2068
2	-77.9564	-9.144	8	-58.0275	-21.9386
3	-68.7851	-8.0682	9	-41.0848	-15.6704
4	-59.6137	-6.9925	10	-49.5561	-18.8045
5	-50.4424	-5.9167	11	-62.2632	-23.5056
6	-41.271	-4.8409	12	-36.8491	-14.1034

The two curve equations after fitting are:

The left chord of the logarithmic curve spiral blade 7: y = 0.1174x + 0.0014;

The right chord of the logarithmic curve spiral blade 7: y = 0.3694x - 0.4771;

See Table 3 for the parameters of the cross-sectional airfoil of the logarithmic curve spiral blade 7 at a distance of 192 cm from the leading edge of the hub.

table 3:

Serial number	X	Y	Serial number	X		Y
1	18.44	-55.814	7	28.439	-51.406
2	20.489	-62.015	8	31.457	-57.118
3	24.587	-74.418	9	37.494	-68.541
4	28.685	-86.821	10	43.531	-79.965
5	32.782	-99.225	11	49.569	-91.388
6	36.88	-111.628	12	55.606	-102.812

The two curve equations after fitting are:

The left chord of the logarithmic curve spiral blade 7: y=0.0001x ² -3.0283x+0.0087;

The right chord of the logarithmic curve spiral blade 7: y = -0.0001x ² -1.8885x + 2.3695.

Example 2.

1 to 5, the number of the variable-diameter logarithmic spiral blades 7 of the present invention is 2-4.

The water inlet of the booster runner is equal in size to the middle section of the shroud 1; the blade 4 and the booster runner of the base runner are sequentially rotated by the impact of the tidal current, and the rotational torque generated by the rotation is transmitted. The rotating shaft 2 is rotated in conjunction with the vane 4 and the energizing rotor.

Example 3.

In conjunction with FIGS. 1 and 2, the hub 3 has a spherical convex shape, the ratio of L ₁ length of the middle section of the hub and the shroud length L ₀ 1 3 0.29 to 0.36, the inlet guide cover 1 ratio of the length L ₁ and L ₂ of the middle section of a shroud segment length is 0.08 to 0.15, _a ratio of the length L is the length of the outlet section of the shroud 1 L of the intermediate section ₃ and the shroud 1 is 0.51 to 0.58.

Example 4.

1, 2 and 5, the base impeller of the present invention comprises blades 4, the number of which is 2-4 pieces.

The ratio of the diameter D _h of the rotating shaft 2 to the diameter D ₀ of the base impeller is 0.21 to 0.28, and the ratio of the diameter D ₁ of the intermediate section of the shroud 1 to the diameter D _{0 of the} foundation impeller is 1.05 to 1.13, and the diversion The ratio of the inlet diameter D _{2 of the} cover 1 to the diameter D ₀ of the base impeller is 1.20 to 1.27, and the ratio of the outlet diameter D _{3 of the} shroud 1 to the diameter D ₀ of the base impeller is 1.68 to 1.75.

The radius of the logarithmic curved spiral blade 7 with variable radius is retractable, and the ratio of the maximum radius R _max of the logarithmic curved spiral blade 7 to the outlet diameter D ₃ of the shroud 1 is 0.92; a logarithmic curve The ratio of the minimum radius _Rmin of the spiral blade 7 to the maximum radius _Rmax of the logarithmic curved spiral blade 7 is 0.8, so that the flow rate at the outlet of the shroud 1 can be adjusted.

Specific embodiments of the main component dimensions of the present invention are further disclosed below in conjunction with the accompanying drawings.

Example 5.

2, the inlet diameter D ₂ of the shroud 1 of the present invention is 302 cm, the diameter D ₀ of the base runner is 240 cm, the diameter of the rotating shaft 2 is 50 cm, and the diameter D ₁ of the middle section of the shroud ₁ is 270cm, the outlet diameter D ₃ of the shroud 1 is 238cm; the length of the inlet section of the shroud 1 is 22cm, the length of the middle section is 144cm, and the length of the outlet section is 84cm; the logarithm of the energizing runner The number of curved spiral blades 7 is two, and the logarithmic curved spiral blade 7 has a diameter of 218 cm.

Example 6.

2, the inlet diameter D ₂ of the shroud 1 of the present invention is 453 cm, the diameter D ₀ of the base runner is 356 cm, the diameter of the rotating shaft 2 is 75 cm, and the diameter D ₁ of the middle section of the shroud ₁ is 405cm, the outlet diameter D ₃ of the shroud 1 is 624cm; the length of the inlet section of the shroud 1 is 33cm, the length of the middle section is 216cm, and the length of the outlet section is 125cm; the logarithm of the energizing runner The number of curved spiral blades 7 was three, the logarithmic curved spiral blade 7 had a pitch of 121 cm, and the logarithmic curved spiral blade 7 had a diameter of 175 cm.

Example 7.

2, the inlet diameter D ₂ of the shroud 1 of the present invention is 400 cm, the diameter D ₀ of the base runner is 300 cm, the diameter of the rotating shaft 2 is 75 cm, and the diameter D ₁ of the middle section of the shroud ₁ is 405cm, the outlet diameter D ₃ of the shroud 1 is 624cm; the length of the inlet section of the shroud 1 is 33cm, the length of the middle section is 216cm, and the length of the outlet section is 125cm; the logarithm of the energizing runner The number of curved spiral blades 7 was four, the logarithmic curved spiral blade 7 had a pitch of 121 cm, and the logarithmic curved spiral blade 7 had a diameter of 185 cm.

It has been verified by experiments that the tidal current turbine with the energizing runner proposed by the present invention can be self-starting at a flow rate of more than 1 m/s and has high efficiency. Compared with the traditional dam power generation, the tidal energy power generating turbine of the present invention can not only protect the natural environment well, but also greatly reduce the cost of the generator set and achieve the purpose of efficiently utilizing the tidal energy.

Descriptions not mentioned in the Detailed Description of the Invention are well known in the art and can be implemented with reference to known techniques.

The invention has been verified by trial and error and has achieved satisfactory trial results.

The above specific embodiments and examples are specific support for the technical idea of a tidal energy turbine with an energizing runner proposed by the present invention, and the scope of protection of the present invention cannot be limited thereto. Any equivalent changes or equivalent modifications made on the basis of the technical solutions are still within the scope of protection of the technical solutions of the present invention.

Claims (7)

1. A tidal energy turbine with an energizing runner, comprising a shroud (1), a hub (3) fixed to the rotating shaft (2), a base impeller fixed to the hub (3), the rotating shaft ( 2) the hub (3) and the base impeller are both placed in the shroud (1), characterized in that it further comprises an energizing runner with a logarithmic curved spiral blade (7) of variable radius, said increase The rotatable wheel is located at the outlet end of the shroud (1), and the logarithmic curved spiral vane (7) is gradually stretched according to the logarithmic curve spiral along the axial direction of the rotating shaft (2), and has a spatially intersecting twisted shape. And uniformly distributed on the circumferential inner wall of the rotating shaft (2), and the intersection point of each section of the logarithmic curved spiral blade (7) with the rotating shaft (2) as the central rotating surface is the origin establishing coordinate system. The logarithmic curve spiral blade (7) on the outer circumference of the rotating shaft (2), the coordinates of the key point at the maximum radius of the cross-sectional airfoil curve at different axial distances are expressed as follows, and X represents a logarithmic curve spiral The spatial abscissa value of the key point on the section airfoil curve of the blade (7), Y represents the logarithmic airfoil curve of the logarithmic curve spiral blade (7) Space key points ordinate value at the leading edge of the parameter 102cm axial logarithmic curve helical blade (7) from the cross section of the airfoil hub (3) of Table 1,

   Table 1:

   Serial number X Y Serial number X Y 1 28.9772 4.8031 7 25.8547 13.5602 2 32.1969 5.3368 8 28.5861 15.0669 3 38.6362 6.4041 9 34.0488 18.0803 4 45.0756 7.4715 10 39.5116 21.0937 5 51.515 8.5388 11 44.9744 24.1071 6 57.9544 9.6062 12 50.4372 27.1205

   The two curve equations after fitting are:

   Logarithmic curve spiral blade (7) left chord: y = 0.1650x + 0.0073;

   The right chord of the logarithmic curve spiral blade (7): y = 0.5516x - 0.7018;

   See Table 2 for the parameters of the logarithmic airfoil of the logarithmic curve spiral blade (7) at a distance of 132 cm from the leading edge of the hub.

   Table 2:

   Serial number X Y Serial number X Y 1 -82.5421 -9.6819 7 -74.9703 -28.2068 2 -77.9564 -9.144 8 -58.0275 -21.9386 3 -68.7851 -8.0682 9 -41.0848 -15.6704 4 -59.6137 -6.9925 10 -49.5561 -18.8045 5 -50.4424 -5.9167 11 -62.2632 -23.5056 6 -41.271 -4.8409 12 -36.8491 -14.1034

   The two curve equations after fitting are:

   Logarithmic curve spiral blade (7) left chord: y = 0.1174x + 0.0014;

   The right chord of the logarithmic curve spiral blade (7): y = 0.3694x - 0.4771;

   See Table 3 for the parameters of the cross-sectional airfoil of the logarithmic curve spiral blade (7) at a distance of 192 cm from the leading edge of the hub.

   table 3:

   Serial number X Y Serial number X Y 1 18.44 -55.814 7 28.439 -51.406 2 20.489 -62.015 8 31.457 -57.118 3 24.587 -74.418 9 37.494 -68.541 4 28.685 -86.821 10 43.531 -79.965 5 32.782 -99.225 11 49.569 -91.388 6 36.88 -111.628 12 55.606 -102.812

   The two curve equations after fitting are:

   The left chord of the logarithmic curve spiral blade (7): y=0.0001x ² -3.0283x+0.0087;

   The right chord of the logarithmic curve spiral blade (7): y = -0.0001x ² -1.8885x + 2.3695.
2. A tidal current turbine with an energizing rotor according to claim 1, wherein the number of the logarithmic curved spiral blades (7) having a variable radius is 2-4.
3. A tidal current turbine with an energizing runner according to claim 2, wherein the inlet of the energizing runner is equal in size to the intermediate section of the shroud (1); The blades (4) of the wheel and the energizing rotor are sequentially rotated by the impact of the tidal current, and the rotational torque generated by the rotation is transmitted to the rotating shaft (2), and the rotating shaft (2) and the blade (4) and the energizing turn The wheel rotates in conjunction.
4. A tidal current turbine with an energizing runner according to claim 3, characterized in that the hub (3) has a spherical convex shape, the length L _{0 of the} hub (3) and the shroud (1) The ratio of the length L ₁ of the intermediate section is 0.29 to 0.36, and the ratio of the length L ₂ of the inlet section of the shroud (1) to the length L ₁ of the intermediate section of the shroud (1) is 0.08 to 0.15. The ratio of the length L ₃ of the outlet section of the flow hood (1) to the length L ₁ of the intermediate section of the flow guide (1) is 0.51 to 0.58.
5. A tidal current turbine with an energizing runner according to claim 4, characterized in that the base impeller comprises blades (4), the number of said blades (4) being 2 to 4.
6. A tidal current turbine with an energizing runner according to claim 5, wherein the ratio of the diameter D _{h of} the rotating shaft (2) to the diameter D ₀ of the base impeller is 0.21 to 0.28, and the diversion The ratio of the diameter D ₁ of the middle section of the cover (1) to the diameter D _{0 of the} base impeller is 1.05 to 1.13, and the ratio of the inlet diameter D _{2 of the} shroud (1) to the diameter D ₀ of the base impeller is 1.20 to 1.27. The ratio of the outlet diameter D _{3 of the} flow hood (1) to the diameter D ₀ of the base impeller is 1.68 to 1.75.
7. A tidal current turbine with an energizing runner according to claim 6, wherein the radius of the logarithmic spiral blade (7) having a variable radius is scalable, and the logarithmic curved spiral blade The ratio of the maximum radius R _{max of} (7) to the outlet diameter D ₃ of the shroud (1) is 0.92; the minimum radius R _min of the logarithmic spiral blade (7) and the logarithmic curve of the helical blade (7) The ratio of the maximum radius R _max is 0.8.

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