阅读说明：本技术 一种导流型双轴薄膜摆动式水轮机 (Flow guide type double-shaft film oscillating water turbine ) 是由 郭朋华 张大禹 袁熙 曹鼎钰 程寅 李昆航 赵洋 于 2021-01-20 设计创作，主要内容包括：本发明公开了一种导流型双轴薄膜摆动式水轮机,采用导流罩、水轮机支架和薄膜叶片结构形成具有导流作用的水轮机结构,通过水轮机支架的两侧分别设置一个导流罩,在导流罩一侧设有矩形开口,使导流罩设有矩形开口一侧所在平面与两个转动支撑轴轴线所在平面夹角为锐角,导流罩的开口处设有导流叶片,利用导流罩上的导流叶片即导流罩设置位置,将进入水轮机支架的水流导流,加速流向迎水面的水流,同时降低了流向逆水面的水流,减少了阻力的产生,同时结合薄膜叶片结构,在顺水面和迎水面均能受到同向力矩,从而大大提升了整机的效率,本装置结构简单,利用导流罩能够提高流入水轮机支架中的水流流速,从而进行聚能传动,有效提高了水流传动的转化率。(The invention discloses a flow-guiding type biaxial film oscillating water turbine, which adopts a flow guide cover, a water turbine bracket and a film blade structure to form the water turbine structure with flow guiding function, wherein the two sides of the water turbine bracket are respectively provided with the flow guide cover, one side of the flow guide cover is provided with a rectangular opening, so that the included angle between the plane of the rectangular opening side of the flow guide cover and the plane of the axes of two rotating support shafts is an acute angle, the opening of the flow guide cover is provided with flow guide blades, the flow guide blades on the flow guide cover, namely the arrangement position of the flow guide cover, are utilized to guide the water flow entering the water turbine bracket, accelerate the water flow flowing to the upstream surface, simultaneously reduce the water flow flowing to the upstream surface, reduce the generation of resistance, and simultaneously combine the film blade structure, so that the same-direction moment can be applied to both the upstream surface and the upstream surface, thereby greatly improving the efficiency of the whole machine, thereby carrying out energy-gathering transmission and effectively improving the conversion rate of water flow transmission.)

1. A flow guide type double-shaft film oscillating water turbine is characterized by comprising a flow guide cover (1), a water turbine support (2) and film blade structures (5), wherein two groups of bearing seats are arranged on the water turbine support (2), each group of bearing seats comprises two bearing supports (3) coaxially arranged at intervals, a rotating support shaft (6) is arranged between the two bearing supports (3) of the same group, two driving wheels (7) are arranged on each rotating support shaft (6), the four driving wheels (7) on the two rotating support shafts (6) are connected through two driving belts (4), and a plurality of film blade structures (5) are fixed between the two driving belts (4) in an array manner; two ends of the water turbine support (2) are arc-shaped, and two sides of the water turbine support (2) are respectively provided with a flow guide cover (1); one side of the guide cover (1) is provided with a rectangular opening, the included angle between the plane where one side of the rectangular opening is arranged and the plane where the axes of the two rotating support shafts (6) are arranged on the guide cover (1) is an acute angle, the plane of the other side of the guide cover (1) is tangent to the arc surface of the end part of the water turbine support (2), a guide vane (10) is arranged at the opening of the guide cover (1), one end of the guide vane (10) is fixed with one opening edge of the guide cover (1), which is parallel to the axes of the rotating support shafts (6), the other end of the guide vane (10) is fixed with the other opening edge of the guide cover (1), which is parallel to the axes of the rotating support shafts (6), and the other two edges.

2. The guide-type biaxial film oscillating water turbine as claimed in claim 1, wherein the guide cover (1) comprises a guide frame (8), the guide frame is provided with an upper guide plate and a lower guide plate which are arranged in parallel, one side of the guide frame is provided with a side guide plate, two ends of the side guide plate are respectively connected with one side of the upper guide plate and one side of the lower guide plate, one end of the guide frame is connected with the arc end of the water turbine support (2), one side of the guide frame opposite to the side guide plate is provided with a guide vane (10), one end of the guide vane (10) is fixed with one end of the side guide plate, the other end of the guide vane (10) is fixed with the guide frame connected with one end of the water turbine support (2), and the other two side edges of.

3. The flow-guiding type biaxial film oscillating water turbine as claimed in claim 1, characterized in that the plane of the rectangular opening side of the flow guide cover (1) is fixedly connected with the water turbine support (2) at the parallel section of the transmission belt (4).

4. A flow-guiding biaxial film oscillating hydraulic turbine as claimed in claim 3, characterized in that the angle between the plane of the rectangular opening side of the flow guiding mantle (1) and the plane of the axes of the two rotating support shafts (6) is 60 ° to 80 °.

5. The flow-guiding type double-shaft thin-film oscillating water turbine as claimed in claim 1, wherein the thin-film blade structure (5) comprises a blade shaft (51) and a rectangular blade frame (52), an inner ring blade (53) is mounted on the rectangular blade frame (52), the blade shaft (51) is fixed on one side of the rectangular blade frame (52), the rectangular blade frame (52) is fixedly connected with the transmission belt (4) through the blade shaft (51), three sides of the inner ring blade (53) are fixedly connected with the side frame of the rectangular blade frame (52), and two sides fixedly connected with the rectangular blade frame (52) are adjacent to the side of the rectangular blade frame (52) on the side of the blade shaft (51).

6. Flow-guiding biaxial film oscillating hydraulic turbine as claimed in claim 5, characterized in that when the rectangular blade frame (52) runs to the parallel sections on both sides of the driving belt (4), the included angle between the plane of the rectangular blade frame (52) and the coplanar plane of the axes of the two rotation supporting shafts (6) is not more than 15 °.

7. The water turbine of claim 6, wherein the rectangular blade frame (52) runs to the parallel surface of the two sides of the transmission belt (4), and the plane of the rectangular blade frame (52) is parallel to the coplanar surface of the axes of the two rotating support shafts (6).

8. The flow-guiding type biaxial film oscillating water turbine as claimed in claim 1, wherein the driving belt (4) is a toothed belt, connecting shafts are installed at both ends of one side frame of the rectangular blade frame (52) and are respectively and fixedly connected with the side walls of the two-day toothed belt, and after installation, the connecting part of the rectangular blade frame (52) and the toothed belt is relatively fixed.

9. The water turbine of claim 1, wherein the transmission belt (4) is a chain, the transmission wheel (7) is a sprocket, two sprockets of the rotating support shaft (6) form a hub structure, the chain is engaged with the sprockets, and each chain is engaged with one sprocket of the two rotating support shafts (6).

Technical Field

The invention belongs to the technical field of ocean power generation, and particularly relates to a flow guide type double-shaft film oscillating water turbine.

Background

With the rapid development of urban modernization and industrialization, energy has long been an important factor influencing the rapid development of economy and society. The common traditional energy sources such as coal, petroleum, natural gas and other fossil fuels can not be regenerated in a short time, and the natural environment can be damaged when the energy sources are consumed. For sustainable development of the environment, the development of new energy sources for replacement is urgent.

Ocean energy is used as a novel green renewable energy source and mainly comprises tidal energy, tidal current energy and wave energy. China has a long coastline and a large sea area, ocean energy is reserved thickly, the coastline is one of the regions with the largest tidal current energy power density in the world, the average power density of part of the regions is more than 20kW/m2, and the development environment and conditions are good. Although tidal current energy has the problems of uneven energy distribution, poor stability and the like, through continuous efforts and exploration, part of tidal current energy equipment realizes full-scale sea test. The tidal current energy generator is mainly divided into the following parts according to the energy capturing principle: horizontal axis, vertical axis, and oscillating hydrofoil. Although the vertical shaft device is less in application compared with a horizontal shaft device, the vertical shaft device is earlier in research and development, and the vertical shaft water turbine has the advantages of no flow direction capturing, simple blade structure, low cost, easiness in processing and the like. In addition, the power generation and speed increasing device of the vertical shaft water turbine can be arranged on the water surface, the sealing requirement can be reduced, the maintenance and the nursing are easy, and the development potential is huge. However, most of the existing vertical axis water turbines convert ocean current energy into mechanical energy by circular rotation of blades, and according to the existing research results, the main power generation area is the windward side, but the windward side has a low proportion by circular rotation, and a large amount of flow-stopping area generates resistance or does not generate power, so that the overall low efficiency is caused.

Disclosure of Invention

The invention aims to provide a flow-guiding type double-shaft film oscillating water turbine to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a flow guide type double-shaft film oscillating water turbine comprises a flow guide cover, a water turbine support and film blade structures, wherein two groups of bearing seats are arranged on the water turbine support, each group of bearing seats comprises two bearing supports which are coaxially arranged at intervals, a rotating support shaft is arranged between the two bearing supports in the same group, each rotating support shaft is provided with two driving wheels, four driving wheels on the two rotating support shafts are connected through two driving belts, and a plurality of film blade structures are fixed between the two driving belts in an array manner; two ends of the water turbine support are arc-shaped, and two sides of the water turbine support are respectively provided with a flow guide cover; one side of the guide cover is provided with a rectangular opening, an included angle between a plane where the rectangular opening is arranged on one side of the guide cover and planes where the axes of the two rotating support shafts are arranged is an acute angle, the other side plane of the guide cover is tangent to the cambered surface of the end part of the water turbine support, a guide vane is arranged at the opening of the guide cover, one end of the guide vane is fixed with one opening edge of the guide cover, which is parallel to the axes of the rotating support shafts, the other end of the guide vane is fixed with the other opening edge of the guide cover, which is parallel to the axes of the rotating support shafts.

Further, the kuppe includes guide frame, be equipped with parallel arrangement's last guide plate and lower guide plate on the guide frame, guide frame one side is equipped with the side deflector that both ends are connected with last guide plate and lower guide plate one side respectively, guide frame's one end is connected with the arc end of hydraulic turbine support, the last one side relative with side deflector that guide frame is equipped with guide vane, guide vane's one end is fixed with the one end of side deflector, guide vane's the other end is fixed with the guide frame who is connected hydraulic turbine support one end, all the other both sides limit of guide vane is uncovered.

Furthermore, the plane of one side of the rectangular opening of the flow guide cover is fixedly connected with the water turbine support and is positioned at the parallel section of the transmission belt.

Furthermore, the included angle between the plane of one side of the rectangular opening of the flow guide cover and the plane of the axes of the two rotating support shafts is 60-80 degrees.

Furthermore, the film blade structure comprises a blade shaft and a rectangular blade frame, wherein an inner ring blade is installed on the rectangular blade frame, the blade shaft is fixed on one side of the rectangular blade frame, the rectangular blade frame is fixedly connected with a transmission belt through the blade shaft, three edges of the inner ring blade are fixedly connected with a frame of the rectangular blade frame, and two edges fixedly connected with the rectangular blade frame are adjacent to the edge of the rectangular blade frame on one side of the blade shaft.

Furthermore, when the rectangular blade frame runs to the parallel sections at the two sides of the transmission belt, the included angle between the plane where the rectangular blade frame is located and the coplane of the axes of the two rotating support shafts is not more than 15 degrees.

Furthermore, when the rectangular blade frame runs to the parallel surfaces at the two sides of the transmission belt, the plane where the rectangular blade frame is located is parallel to the coplane of the axes of the two rotating support shafts.

Furthermore, the transmission belt adopts a toothed belt, connecting shafts are installed at two ends of a side frame of the rectangular blade frame and are respectively and fixedly connected with the side walls of the two days of toothed belts, and after the rectangular blade frame and the toothed belt are installed, the connecting part of the rectangular blade frame and the toothed belt is relatively fixed.

Furthermore, the transmission belt adopts chains, the transmission wheel adopts chain wheels, two chain wheels on the rotating supporting shafts form a shaft hub structure, the chains are meshed with the chain wheels, and each chain is respectively meshed with one chain wheel on the two rotating supporting shafts.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention relates to a flow-guiding type biaxial film oscillating water turbine, which adopts a flow guide cover, a water turbine support and a film blade structure to form the water turbine structure with flow guiding function, wherein two sides of the water turbine support are respectively provided with the flow guide cover, one side of the flow guide cover is provided with a rectangular opening, an included angle between a plane on which one side of the flow guide cover provided with the rectangular opening and a plane on which the axes of two rotating support shafts are arranged is an acute angle, the opening of the flow guide cover is provided with the flow guide blade, the flow guide blade on the flow guide cover, namely the setting position of the flow guide cover, guides the water flow entering the water turbine support to accelerate the water flow towards the upstream surface, simultaneously reduces the water flow towards the upstream surface, reduces the generation of resistance, simultaneously combines the film blade structure, can bear same-direction torque on the upstream surface and the upstream surface, thereby greatly improving the efficiency of the whole machine, the device has, thereby carrying out energy-gathering transmission and effectively improving the conversion rate of water flow transmission.

Furthermore, when the fluid passes through the blades, the free long edge swings to form a certain radian towards the fluid direction due to the elasticity of the film, so that the power generated by the fluid is obtained. The inertia of the flexible blade is minimal and hysteresis effects are also minimal. On the upstream face, the free edge of the film blade is on the right side, and the film blade swings clockwise by a certain angle, so that the film blade on the upstream face obtains a leftward moment, namely an anticlockwise moment. The water level that is the same is followed to rotatory linear velocity direction and rivers direction, also is the left side of hydraulic turbine, and the film blade receives the decurrent power and still produces anticlockwise moment, and the surface of a poor water is the straight face of the downside of hydraulic turbine promptly, and film blade counter-clockwise turning certain angle receives the effect by the rivers after the upstream surface water conservancy diversion, receives the power that also produces anticlockwise moment to the right to the contained angle of rivers direction and film blade after the water conservancy diversion more is close perpendicular so moment of production bigger. The reverse water surface is the right side of the water turbine, the linear speed of the blade motion is opposite to the water flow direction, but the film blade can freely swing in the blade frame, the film blade is arranged on the rear side of the blade frame facing the water flow direction to form a certain flow guide phenomenon, the reverse moment generated on the reverse water surface is reduced, and the whole water turbine has a higher energy utilization coefficient.

Furthermore, the included angle between the plane where the rectangular blade support is located and the coplane of two rotation support shaft axes is not more than 15 degrees, and it is the biggest to receive same rivers effort when can make the rectangular blade support move to both sides, avoids the too big film blade that leads to of angle to receive the rivers influence to form the reverse resistance face.

Furthermore, when the rectangular blade support moves to the parallel surfaces of the two sides of the transmission belt, the plane where the rectangular blade support is located is parallel to the coplane of the axes of the two transmission shafts, and at the moment, the film blade is stressed maximally in all directions, and the efficiency is highest.

Drawings

Fig. 1 is a schematic perspective view of an overall device according to an embodiment of the present invention.

FIG. 2 is a front view of an embodiment of the present invention.

Fig. 3 is a top view of fig. 2.

FIG. 4 is an isometric view of a pod mounting structure in an embodiment of the invention.

Fig. 5 is a schematic view of a dome mounting structure according to an embodiment of the present invention.

FIG. 6 is a bottom view of a pod mounting structure in accordance with an embodiment of the present invention.

FIG. 7 is a bottom view of a pod mounting structure in an embodiment of the invention.

FIG. 8 is a bottom view of a pod mounting structure in an embodiment of the invention.

FIG. 9 is a bottom view of a pod mounting structure in accordance with an embodiment of the present invention.

FIG. 10 is a schematic view of a thin film blade according to an embodiment of the present invention.

FIG. 11 is a schematic diagram of the force applied to the flow field by the thin film blade structure according to the embodiment of the present invention.

Fig. 12 is a schematic diagram of the stress of the flow field in the water turbine support in the embodiment of the invention.

Fig. 13 is a schematic diagram of the overall force applied to the forward flow field in the embodiment of the present invention.

FIG. 14 is a diagram illustrating the stress of the reverse flow field in the embodiment of the present invention.

Wherein, 1, a flow guide cover; 2. a water turbine support; 3. a bearing support; 4. a transmission belt; 5. a membrane leaf structure; 6. rotating the support shaft; 7. a driving wheel; 8. a draft frame; 9. (ii) a 10. A guide vane; 51. a blade shaft; 52. a rectangular blade frame; 53. and an inner ring blade.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1 to 3, a flow-guiding type biaxial film oscillating water turbine comprises a flow guiding cover 1, a water turbine support 2 and film blade structures 5, wherein two groups of bearing seats are arranged on the water turbine support 2, each group of bearing seats comprises two bearing supports 3 coaxially arranged at intervals, a rotating support shaft 6 is arranged between the two bearing supports 3 in the same group, two driving wheels 7 are arranged on each rotating support shaft 6, the four driving wheels 7 on the two rotating support shafts 6 are connected through two driving belts 4, and a plurality of film blade structures 5 are fixed between the two driving belts 4 in an array manner; two ends of the water turbine support 2 are arc-shaped, and two sides of the water turbine support 2 are respectively provided with a flow guide cover 1; one side of the guide cover 1 is provided with a rectangular opening, an included angle between a plane where one side of the rectangular opening is arranged on the guide cover 1 and planes where the axes of the two rotating support shafts 6 are arranged is an acute angle, the other side plane of the guide cover 1 is tangent to the arc surface of the end part of the water turbine support 2, a guide vane 10 is arranged at the opening of the guide cover 1, one end of the guide vane 10 is fixed with one opening edge of the guide cover 1, which is parallel to the axes of the rotating support shafts 6, the other end of the guide vane 10 is fixed with the other opening edge of the guide cover 1, which is parallel to the axes of the rotating support shafts 6, and.

Specifically, as shown in fig. 4 to 6, the wind deflector 1 includes a guide frame 8, an upper guide plate and a lower guide plate which are arranged in parallel are arranged on the guide frame, a side guide plate is arranged on one side of the guide frame, two ends of the side guide plate are respectively connected with one sides of the upper guide plate and the lower guide plate, one end of the guide frame is connected with the arc end of the water turbine support 2, a guide vane 10 is arranged on one side of the guide frame opposite to the side guide plate, one end of the guide vane 10 is fixed with one end of the side guide plate, the other end of the guide vane 10 is fixed with the guide frame connected with one end of the water turbine support 2, and the other two side edges of the guide vane 10 are open (i.e., one side. The side guide plate is provided with a mounting hole 9, and the side guide plate is mounted on a foundation or a river bed through the mounting hole 9 through foundation bolts.

The plane of one side of the air guide sleeve 1 provided with the rectangular opening is fixedly connected with the water turbine bracket 2 and is positioned at the parallel section of the transmission belt 4; the parallel section of the transmission belt 4 refers to a section of the transmission belt tangent to both the two transmission wheels.

Preferably, the angle between the plane of one side of the rectangular opening of the guide cover 1 and the plane of the axes of the two rotating support shafts 6 is 60-80 degrees, and at the moment, the mounting plane of the guide vanes 10 can enable water flow to be smoothly guided into the water turbine support 2, so that the maximum flow direction is formed on the membrane vane structure 5 in the water turbine support 2.

As shown in fig. 10, the film blade structure 5 includes a blade shaft 51 and a rectangular blade frame 52, an inner ring blade 53 is mounted on the rectangular blade frame 52, the blade shaft 51 is fixed to one side of the rectangular blade frame 52, the rectangular blade frame 52 is fixedly connected to the transmission belt 4 through the blade shaft 51, three sides of the inner ring blade 53 are fixedly connected to the frame of the rectangular blade frame 52, and two sides fixedly connected to the rectangular blade frame 52 are adjacent to the side of the rectangular blade frame 52 connected to one side of the blade shaft 51. The side part of the vane shaft 51 is fixedly connected with the long side of the rectangular vane frame 52, the inner ring vane 53 is made of a flexible film material, preferably, three sides of the inner ring vane 53 are respectively fixed with three sides of the rectangular vane frame 52, the other long side of the inner ring vane 53 is a free side, and an opening is formed at one side of the inner ring vane 53 and one side of the rectangular vane frame 52. And the directions of the free edges (opening edges) of the inner ring blades 53 of all the film blade structures 5 are consistent. The inner ring blades 53 can change the direction of the upstream surface (concave surface) along with the change of the direction of water flow, so that the rotating direction of the chain wheel is kept unchanged regardless of the change of the direction of the water flow, and the power generation efficiency of the turbine is ensured. When the rectangular blade frame 52 is mounted on the belt 4, the long bottom edge of the rectangular blade frame 52 should be parallel to the axis of the rotation support shaft 6.

As shown in fig. 7-9, when the rectangular blade frame 52 runs to the parallel sections at both sides of the transmission belt 4, the included angle between the plane of the rectangular blade frame 52 and the coplanar plane of the axes of the two rotation support shafts 6 is not more than 15 °. That is, when the rectangular blade frame 52 moves along the belt 4 to the plane of the parallel segments at the two sides of the same belt, the plane of the parallel segments at the two sides of the same belt is parallel to the coplanar plane of the axes of the two rotating support shafts 6.

Preferably, when the rectangular blade frame 52 runs to the parallel surface on both sides of the transmission belt 4, the plane where the rectangular blade frame 52 is located is parallel to the coplanar surface of the axes of the two rotation support shafts 6, i.e. the included angle is 0, and at this time, when the rectangular blade frame 52 runs along the transmission belt to the plane of the transmission belt, the rectangular blade frame 52 is coplanar with the transmission belt.

This application drive belt 4 adopts toothed belt or chain, and when drive belt 4 adopted toothed belt, the connecting axle was installed at the both ends of a side frame of rectangle blade frame 52, respectively with the lateral wall fixed connection of two days toothed belt, the installation back, rectangle blade frame 52 and toothed belt junction relatively fixed. When the transmission belt 4 adopts a chain, the transmission wheel 7 adopts a chain wheel, two chain wheels on the rotating supporting shafts 6 form a shaft hub structure, the chain is meshed with the chain wheel, and each chain is respectively meshed with one chain wheel on the two rotating supporting shafts 6. Two ends of a side frame of the rectangular blade frame 52 are respectively and fixedly connected with chain links on the two chains, and the function of supporting the chains is achieved between the two chains.

As shown in fig. 11, when the fluid passes through the rectangular blade frame 52, the free edge of the inner-ring blade 53 swings to form a certain arc in the fluid flowing direction due to the elasticity of the inner-ring blade 53, and a concave structure is formed, so that the power generated by the fluid is obtained.

According to the direction of water flow, the translation section close to the flow direction is called a water facing surface, the translation section far away from the water flow direction is a water backing surface, the arc section with the linear speed consistent with the water flow direction is called a water facing surface, and the linear speed inconsistent with the water flow direction is a water backing surface.

When fluid passes through the film blades, the free long edges can swing towards the direction of the fluid to form a certain radian due to the elasticity of the film blades, so that power generated by the fluid is obtained. The inertia of the flexible blade is minimal and hysteresis effects are also minimal. On the upstream face, the free edge of the film blade is on the right side, and the film blade swings clockwise by a certain angle, so that the film blade on the upstream face obtains a leftward moment, namely an anticlockwise moment. The water level that is the same is followed to rotatory linear velocity direction and rivers direction, also is the left side of hydraulic turbine, and the film blade receives the decurrent power and still produces anticlockwise moment, and the surface of a poor water is the straight face of the downside of hydraulic turbine promptly, and film blade counter-clockwise turning certain angle receives the effect by the rivers after the upstream surface water conservancy diversion, receives the power that also produces anticlockwise moment to the right to the contained angle of rivers direction and film blade after the water conservancy diversion more is close perpendicular so moment of production bigger. The reverse water surface is the right side of the water turbine, the linear speed of the blade motion is opposite to the water flow direction, but the film blade can freely swing in the blade frame, the film blade is arranged on the rear side of the blade frame facing the water flow direction to form a certain flow guide phenomenon, the reverse moment generated on the reverse water surface is reduced, and the whole water turbine has a higher energy utilization coefficient. Specifically, the method comprises the following steps: as shown in fig. 12 and 13, when water flows from left to right, the guide vanes 10 at the lower part are swung into an arc shape as shown in fig. 13 by the action of the water flow, so that the water flow flowing to the upstream surface is accelerated, and the positive moment generated by the membrane blade structures 5 at the upstream surface and the downstream surface is increased; and the surface of the back water has reduced the rivers to the surface of the back water because the kuppe blocks 5 surface of the back water delivery ports of film blade structure, has reduced the production of resistance to the efficiency of complete machine has been promoted greatly. When the water flows from right to left, the guide vanes 10 on the upper part are swung into an arc shape under the action of the water flow as shown in fig. 14, the water flow speed flowing to the film vane structure 5 on the upstream surface and the downstream surface is accelerated, and the guide vanes 10 on the guide cover on the lower part generate a blocking effect on the upstream surface, so that the generation of resistance is reduced, and the overall efficiency is increased.

The water flow entering the water turbine support 2 through the air guide sleeve flows from left to right as shown in fig. 12, the transmission shaft is arranged along a plane perpendicular to the water flow, the free edge of the rectangular blade frame 52 facing the water flow direction is arranged on the upper side, namely the upper side of the inner ring blade 53 on the rectangular blade frame 52 at the left end of the transmission belt 4 is an opening, the plane where the rectangular blade frame 52 is arranged is parallel to the coplane of the axes of the two rotating support shafts 6 when the transmission belt 4 is arranged on the horizontal plane, the inner ring blade 53 swings clockwise for a certain angle, so that the inner ring blade 53 facing the water obtains a downward moment, namely an anticlockwise moment, and the rotating support shafts 6 rotate anticlockwise under force; the rotation linear speed direction is consistent with the water flow direction, the inner ring blade 53 still generates counterclockwise moment under the action of rightward force, the back water surface is a straight surface on the right side of the water turbine, the film blade 5 swings counterclockwise by a certain angle, and under the action of water flow guided by the upstream surface, counterclockwise moment is generated under the action of upward component force, and the included angle between the water flow direction after the flow is guided and the film blade 53 is closer to be vertical, so that the generated moment is larger. The upstream surface is the upper side of the water turbine, and the flow guide cover blocks the water outlet of the downstream surface of the thin film blade structure 5, so that the flow velocity of the upstream surface is reduced, the reverse moment generated on the upstream surface is reduced, and the whole rotor in the water turbine has higher energy utilization coefficient.

A plurality of thin film blade structures 5 are fixed between the two transmission belts 4 in an array mode, the number of blades which can be added in a unit water turbine structure is increased, the area ratio of the upstream surface to the downstream surface is increased, and therefore the energy utilization rate of the blades to incoming flow in a certain direction is improved. In addition, the rectangular frame is matched with a film material, so that the hysteresis effect generated by the self inertia of the blade in the rigid swing type blade design can be reduced, the blade cavitation effect generated by pressure mutation is avoided at the tail part of the blade, and the service life of the blade is prolonged. Meanwhile, the thin film blades are influenced by water flow to swing so as to improve additional resistance generated by biological attachment or water body corrosion. The use of thin film blades also reduces the overall turbine polar moment of inertia, increasing its self-starting performance. The use of diaphragm blades also reduces the manufacturing and installation costs of the turbine.