CN109931200B - Vertical shaft three-flow-line type automatic opening and closing water turbine - Google Patents
Vertical shaft three-flow-line type automatic opening and closing water turbine Download PDFInfo
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- CN109931200B CN109931200B CN201910256423.2A CN201910256423A CN109931200B CN 109931200 B CN109931200 B CN 109931200B CN 201910256423 A CN201910256423 A CN 201910256423A CN 109931200 B CN109931200 B CN 109931200B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a vertical axis three-flow-line type automatic opening and closing water turbine which comprises a main shaft, a hub, a blade rotating shaft, a blade group and a limiting device. The blade group of the invention has three streamline characteristics at the same time: firstly, when the blade group is closed, the outline of the whole blade group forms a symmetrical streamline; secondly, the cross sections of the upper blade and the lower blade of the blade group are airfoil-shaped; thirdly, the longitudinal sections of the upper blade and the lower blade of the blade group are in a upturned streamline shape; therefore, the three-streamline type characteristic of the automatic opening and closing type water turbine is formed. The water turbine can automatically open and close the blade group under the action of water flow by virtue of a unique blade structure and a rotation limiting structure, and an action torque is formed between the opened blade and the closed symmetrical streamline-shaped blade to push the impeller to rotate.
Description
Technical Field
The invention relates to the technical field of water turbines, in particular to a vertical shaft three-flow-line type automatic opening and closing water turbine.
Technical Field
The current hydroelectric generation utilizes the water flow with potential energy at high positions such as rivers, lakes and the like to flow to low positions, converts the potential energy contained in the water flow into the kinetic energy of a water turbine, and then uses the water turbine as motive power to push a generator to generate electric energy. Compared with other power generation energy sources, the water energy is an inexhaustible renewable clean energy source, and the impact of hydroelectric power generation on the environment is small.
Due to the advantages mentioned above, hydroelectric power generation has been receiving much attention. The existing hydroelectric generation device mainly converts potential energy of fluid height difference into rotary mechanical energy for power generation, and kinetic energy of water flow is not effectively utilized after the potential energy is utilized. In addition, the invention aims to develop a device which can effectively utilize kinetic energy in water flow to generate power, wherein the kinetic energy of water in small rivers, ditches and the like is still in a state of being developed and utilized.
Disclosure of Invention
The invention provides a vertical axis three-flow-line type automatic opening and closing water turbine, which can convert water flowing energy into rotating mechanical energy more efficiently and improve the utilization rate of fluid energy through power generation.
The invention adopts the following technical scheme:
a vertical axis three-flow linear type automatic opening and closing water turbine comprises a main shaft, a hub, a blade rotating shaft, a blade group and a limiting device, wherein the limiting device comprises a blade group axial limiting mechanism and a blade rotating limiting mechanism; the hub is fixedly arranged on the main shaft, a plurality of blade rotating shafts are uniformly and fixedly arranged on the outer circumference of the hub, and one end of each blade rotating shaft, which is far away from the hub, is provided with a blade group, a blade group axial limiting mechanism and a blade rotation limiting mechanism; the blade group is used for driving the main shaft to rotate, the blade group needs to be opened and closed to the maximum in the incident flow so as to provide the maximum incident flow lifting force to expand the blade group and provide the maximum driving force to rotate the main shaft, and the upper blade and the lower blade are ensured not to generate interference; when the water turbine runs counter, the blade group is in a closed state, and a symmetrical streamline is integrally formed to reduce the water flow resistance so as to reduce the influence of the water flow on the rotation of a main shaft of the water turbine; therefore, the normal operation of the blade assembly can be ensured by rotating the limiting device for the opening and closing angle range and the opening and closing direction of the blade assembly. Meanwhile, in order to realize that the blade group can be automatically opened and closed and the posture of the blade group can be changed in water flow, the blade group is required to be processed and manufactured by adopting specific materials;
the blade group comprises a lower blade, a lower blade rotating sleeve I, a lower blade rotating sleeve II, an upper blade and an upper blade rotating sleeve; the lower blade rotating sleeve I and the lower blade rotating sleeve II are fixedly arranged on one side of the lower blade close to two ends, and the upper blade rotating sleeve is fixedly arranged in the middle of one side of the upper blade; the lower blade rotating sleeve I, the upper blade rotating sleeve and the lower blade rotating sleeve II sequentially penetrate through the corresponding blade rotating shafts;
the lower blade rotating sleeve I, the upper blade rotating sleeve and the lower blade rotating sleeve II are respectively arranged on the corresponding blade rotating shafts through rotating fit (clearance fit) with the corresponding blade rotating shafts, the upper blade rotating sleeve is positioned between the lower blade rotating sleeve I and the lower blade rotating sleeve II, the lower blade is rotatably matched (clearance fit) with the corresponding blade rotating shafts through the lower blade rotating sleeve I and the lower blade rotating sleeve II, and the upper blade is rotatably matched (clearance fit) with the corresponding blade rotating shafts through the upper blade rotating sleeve;
the axial limiting mechanism of the blade group comprises a front streamline end and a retaining ring, the front streamline end is arranged at the outer end of the corresponding blade rotating shaft and limits the lower blade rotating sleeve I, a clamping groove is arranged on the outer circumference of the blade rotating shaft, which is close to the lower blade rotating sleeve II, and the retaining ring is clamped in the clamping groove and limits the lower blade rotating sleeve II;
the blade rotation limiting structure comprises a rotation limiting structure of an upper blade and a rotation limiting structure of a lower blade. Through the rotation limiting structure, the relative rotation position of the upper blade and the lower blade of the blade group can be limited. The relative rotation position comprises the rotation direction and the limitation of the maximum opening and closing angle of the upper blade and the lower blade.
The blade rotation limiting mechanism can effectively limit the opening and closing directions and the opening and closing angles of the upper blade and the lower blade of the blade group through the application of a mechanical structure, so that the blade group is opened to the maximum opening and closing angle to push the main shaft to rotate when the blades are in stream attack through the opening and closing limits of the upper blade and the lower blade in the blade group, the blades are closed to form symmetrical streamline to reduce resistance in the countercurrent process, interference does not occur in the whole process, and the blade rotation limiting mechanism is finally converted into an energy conversion mode of electric energy.
The invention provides a vertical axis three-flow linear automatic opening and closing type water turbine, which comprises a hub arranged on a main shaft, wherein a plurality of blade rotating shafts are uniformly fixed on the outer circumference of the hub, one end of each blade rotating shaft, which is far away from the hub, is provided with a blade group, a blade group axial limiting mechanism and a blade rotating limiting mechanism, so that each group of blades rotate along with the main shaft, each blade group comprises an upper blade and a lower blade which are matched with each other, the upper blade and the lower blade are arranged on the blade rotating shafts (in clearance fit), so that each blade can rotate around the blade rotating shafts, the blade groups can automatically open and close under the action of water flow, and an action torque is formed between symmetrical streamline blades of which the blades are opened and closed to push the hub to drive the main shaft to rotate.
Further, lower blade rotating sleeve I sets up two curved spouts along its circumference on being close to the one end terminal surface of upper blade rotating sleeve, one end of upper blade rotating sleeve sets up two sliders along its circumference, two sliders that one end was served to the upper blade rotating sleeve are located two spouts of lower blade rotating sleeve I respectively and rather than the spout sliding fit that corresponds.
Furthermore, two arc-shaped sliding grooves are formed in the end face, close to the upper blade rotating sleeve, of the lower blade rotating sleeve II along the circumferential direction of the upper blade rotating sleeve, two sliding blocks are arranged on the end face, close to the end face of the contact end of the upper blade rotating sleeve and the end face of the contact end of the lower blade rotating sleeve II along the circumferential direction of the lower blade rotating sleeve, and the two sliding blocks on the end face, close to the end face of the contact end of the upper blade rotating sleeve and the end face of the contact end of the lower blade rotating sleeve are respectively located in the two sliding grooves of the lower blade rotating sleeve II and are in sliding fit with the corresponding sliding grooves.
Furthermore, arc-shaped grooves which are matched with the outer circular surfaces of the lower blade rotating sleeve I and the lower blade rotating sleeve II are respectively arranged on one side of the upper blade close to the two ends of the upper blade.
Further, the cross section of the upper blade and the lower blade is an airfoil.
Further, the longitudinal section of the blade assembly formed by the upper blade and the lower blade is streamline when closed, namely, a symmetrical streamline is formed.
Further, the streamline is a streamline formed by smooth transition connection.
Furthermore, the blade group material, namely the upper blade and the lower blade, needs to be processed and manufactured by adopting the material which has the density similar to that of water or can enable the blade group to be nearly suspended in the water.
Furthermore, the surfaces of the upper blade, the lower blade rotating sleeve I, the lower blade rotating sleeve II and the upper blade rotating sleeve are all provided with corrosion resistant layers.
Furthermore, the rotation limiting structure needs to meet the requirements of material properties such as strength, hardness, impact toughness and the like.
Drawings
Fig. 1 is a schematic diagram of the whole structure of a vertical axis three-flow type automatic opening and closing water turbine.
Fig. 2 is an exploded view of an assembly object of a blade group and a blade rotating shaft in a vertical axis three-flow type automatic opening and closing water turbine, namely, an upper blade 421, an upper blade rotating sleeve 422, a bearing 5 and a retainer ring 7 move downwards along the blade rotating shaft 3; the views are merely illustrative for the subsequent explanation and do not represent the actual assembly process.
Fig. 3 is a first structural schematic diagram of the matching of a lower blade, a lower blade rotating sleeve I and a lower blade rotating sleeve II.
Fig. 4 is a schematic structural diagram II of the matching of the lower blade, the lower blade rotating sleeve I and the lower blade rotating sleeve II.
Fig. 5 is a third schematic structural diagram of the matching of the lower blade, the lower blade rotating sleeve I and the lower blade rotating sleeve II.
Fig. 6 is a first structural diagram of the upper blade and the upper blade rotating sleeve in matching.
Fig. 7 is a schematic structural diagram II of the upper blade and the upper blade rotating sleeve in matching.
Fig. 8 is a third schematic structural diagram of the upper blade and the upper blade rotating sleeve in matching.
Fig. 9 is a schematic structural view of the axial limiting mechanism of the vane group arranged on the vane rotating shaft.
Fig. 10 is a schematic view of the assembly of the upper and lower blades and the blade shaft of the vertical axis tri-flow type automatic opening and closing water turbine provided by the present invention (closed state).
Fig. 11 and 12 are schematic views of the assembly of the upper and lower blades and the blade shaft of the vertical axis tri-flow type automatic opening and closing water turbine provided by the present invention (maximum opening and closing state).
Fig. 13 is a schematic view of the vertical axis three-flow type automatic opening and closing water turbine provided by the invention.
In the figure: 1-a main shaft; 2-a hub; 3, a blade rotating shaft; 4-blade group; 411 — lower leaf; 412-lower blade rotating sleeve I; 413-lower blade rotating sleeve II; 414-chute; 421-upper blade; 422-upper blade rotating sleeve; 423-sliding block; 424-circular arc groove; 5, a bearing; 6, arranging a streamline end head in front; 7, a check ring; 8, a clamping groove.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal," "radial," "axial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships based on the orientation shown in the drawings for convenience in describing the invention and simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the vertical axis three-flow type automatic opening and closing water turbine comprises a main shaft 1, a hub 2, a blade rotating shaft 3, a blade group 4 and a limiting device. The limiting device comprises a blade group axial limiting mechanism and a blade rotation limiting mechanism. Wheel hub 2 is fixed to be set up 1 on the main shaft, and even fixed mounting has a plurality of blade pivot 3 on wheel hub 2's the outer circumference, every blade pivot 3 keeps away from the one end of wheel hub 2 and is equipped with blading 4, blading axial stop gear and blade rotation stop gear. In this embodiment, six blade rotating shafts 3 are uniformly and fixedly installed on the outer circumference of the hub 2, and the vertical axis three-flow type automatic opening and closing water wheel is formed by adopting the six blade rotating shafts 3.
As shown in fig. 2, the vane group 4 includes a lower vane 411, a lower vane rotating sleeve i 412, a lower vane rotating sleeve ii 413, an upper vane 421 and an upper vane rotating sleeve 422. The matching structure of the lower blade, the lower blade rotating sleeve I and the lower blade rotating sleeve II is shown in figures 3-5, and the lower blade rotating sleeve I412 and the lower blade rotating sleeve II 413 are fixedly arranged on one side of the lower blade 411 close to two ends. The upper blade and the upper blade rotating sleeve are matched as shown in fig. 6-8, and the upper blade rotating sleeve 422 is fixedly arranged in the middle of one side of the upper blade 421. The upper blade 421 and the lower blade 411 are required to be made of a material having a density close to or equal to that of water so that the blade assembly can be brought into a suspended or nearly suspended state in the flowing water.
Lower blade rotates cover I412, upper blade rotates cover 422 and lower blade and rotates cover II 413 and pass corresponding blade pivot 3 in proper order, lower blade rotates cover I412, upper blade rotates cover 422 and lower blade and rotates the equal clearance fit's of cover II 413 mode and install on corresponding blade pivot 3, upper blade rotates cover 422 to be located lower blade and rotates between cover I412 and lower blade and rotate cover II 413, lower blade 411 passes through lower blade and rotates cover I412, lower blade rotates cover II 413 and the blade pivot 3 normal running fit that corresponds, upper blade 421 passes through upper blade and rotates cover 422 and the blade pivot 3 normal running fit that corresponds, realize that blading 4 can be around blade pivot 3 free rotation.
The axial limiting mechanism of the blade group comprises a front streamline end 6 and a retainer ring 7, as shown in fig. 9, the front streamline end 6 is arranged at the outer end of the corresponding blade rotating shaft 3, the outer end of the blade rotating shaft 3 is made to be in a mushroom shape at the front end, and the front streamline end 6 limits the lower blade rotating sleeve I412. A clamping groove 8 is formed in the outer circumference, close to the lower blade rotating sleeve II 413, of the blade rotating shaft 3, and the check ring 7 is clamped in the clamping groove 8 and limits the lower blade rotating sleeve II 413. The blade group axial limiting mechanism is positioned on the blade rotating shaft 3 and is suitable for limiting the maximum translational movement range of the blade group 4 along the axial position of the blade rotating shaft 3.
The blade rotation limiting mechanism comprises sliding blocks 423 respectively arranged at two ends of an upper blade rotating sleeve 422, an arc-shaped sliding groove 414 is respectively arranged on the end surface of one end, close to the upper blade rotating sleeve 422, of a lower blade rotating sleeve I412 and on the end surface of one end, close to the upper blade rotating sleeve 422, of a lower blade rotating sleeve II 413 along the circumferential direction of the lower blade rotating sleeve I, and the sliding groove 414 limits the closing of the lower blade 411 and the upper blade 421 and the maximum opening angle of the lower blade 411 and the upper blade 421; the sliding block 423 on one end of the upper blade rotating sleeve 422 is located in the sliding groove 414 of the lower blade rotating sleeve I412 and is in sliding fit with the sliding groove 414, and the sliding block 423 on the other end of the upper blade rotating sleeve 422 is located in the sliding groove 414 of the lower blade rotating sleeve II 413 and is in sliding fit with the sliding groove 414, so that the limitation of the lower blade 411 and the upper blade 421 in the rotating angle range and the relative rotating direction is realized. The maximum range of the rotation angle of the lower blade 411 and the upper blade 421 on the blade rotating shaft 3 and the starting and ending positions are determined by the blade rotation limiting mechanism.
In order to better fit the lower blade rotating sleeve I412, the upper blade rotating sleeve 422 and the lower blade rotating sleeve II 413, increase the stability of the lower blade 411 and the upper blade 421 in the rotating process, reduce friction and prolong the service life, two arc-shaped sliding grooves 414 are arranged on the end surface of one end, close to the upper blade rotating sleeve 422, of the lower blade rotating sleeve I412 along the circumferential direction of the lower blade rotating sleeve, two sliding blocks 423 are arranged on the end surface of the end, close to the lower blade rotating sleeve I412, of the upper blade rotating sleeve 422 along the circumferential direction of the upper blade rotating sleeve, and the two sliding blocks 423 on one end of the upper blade rotating sleeve 422 are respectively positioned in the two sliding grooves 414 of the lower blade rotating sleeve I412 and are in sliding fit with the corresponding sliding grooves 414; two arc-shaped sliding grooves 414 are formed in the end face, close to the upper blade rotating sleeve 422, of the lower blade rotating sleeve II 413 along the circumferential direction of the lower blade rotating sleeve II 413, two sliding blocks 423 are arranged in the end face, close to the end face of the lower blade rotating sleeve II 413, of the upper blade rotating sleeve 422 along the circumferential direction of the upper blade rotating sleeve II 413, and the two sliding blocks 423 on the upper blade rotating sleeve 422 are respectively located in the two sliding grooves 414 of the lower blade rotating sleeve II 413 and are in sliding fit with the corresponding sliding grooves 414.
One side of the upper blade 421 is provided with arc grooves 424 corresponding to the outer circular surfaces of the lower blade rotating sleeve I412 and the lower blade rotating sleeve II 413 near two ends, so that the outer circular surfaces of the lower blade rotating sleeve I412 and the lower blade rotating sleeve II 413 can be better matched with the arc grooves 424 on one side of the upper blade 421. The cross sections of the upper blade 421 and the lower blade 411 are airfoil-shaped, the longitudinal sections of the upper blade 421 and the lower blade 411 are streamline-shaped, the front streamline end 6 is arranged at the head of the blade rotating shaft 3 to form an outer contour curve of an annular structure, the outer contour curve is an extension of an outer streamline curve of the airfoil-shaped, and after the installation is completed, the outer contour curve and the lower blade rotating sleeve I412, the upper blade rotating sleeve 422 and the lower blade rotating sleeve II 413 on the blade rotating shaft 3 can form complete streamline transition. The streamline is formed by smooth transition connection, the upper blade 421 and the lower blade 411 jointly form a double streamline structure, and the blade group is in a symmetrical streamline structure when the blade group is closed, so that the upper blade and the lower blade can obtain larger lift force when the blades face the flow, and the resistance is greatly reduced when the blades reverse flow. The surfaces of the upper blade 421, the lower blade 411, the lower blade rotating sleeve I412, the lower blade rotating sleeve II 413 and the upper blade rotating sleeve 422 are all provided with corrosion-resistant layers, and the specific corrosion-resistant layers can be arranged on the surfaces in a coating mode to play a role in corrosion resistance.
Each group of blades on the water turbine rotates along with the main shaft, each blade group comprises an upper blade 421 and a lower blade 411 which are matched with each other, the upper blade and the lower blade are arranged on a blade rotating shaft, so that each blade can rotate around the blade rotating shaft 3, the outer part of the whole blade group 4 is a smooth transition curved surface under the condition of arbitrary opening and closing, the blade group can freely rotate around the blade rotating shaft 3, and the lower blade 411 and the upper blade 421 can relatively rotate within a certain angle range and in a certain rotating direction, so that the upper blade and the lower blade can automatically move according to the incoming flow direction to change the posture and the opening and closing state of the blade group, the blade group can be opened and closed to the maximum degree during the incident flow so as to provide the maximum incident flow lifting force to expand the blade group and provide the maximum driving force to rotate the main shaft, and the upper blade and the lower blade are ensured not to generate interference; when the water turbine runs counter, the blade group is in a closed state, and the blade group integrally forms a symmetrical streamline shape so as to reduce the water flow resistance and further reduce the influence of water flow on the rotation of a main shaft of the water turbine; this also helps the turbine to absorb more fluid kinetic energy and convert it into rotational kinetic energy of the blade rotor 3, thereby improving the utilization of fluid energy.
In the implementation, the cross sections of the lower blade 411 and the upper blade 421 are of gradually-changing airfoil shapes, so that the self weight of the blades is reduced, and the lift force borne by the blades is converted into mechanical energy which enables the blade group to drive the main shaft to rotate as much as possible when the blades are in the incident flow state, and because the end part of the blade rotating shaft 3 is provided with the front streamline end 6, when the blades are in the incident flow state, fluid firstly passes through the foremost end and then completely passes through the blade group 4, the structure is more stable, the energy loss is less, and the blades are ensured to be rapidly and stably opened; any longitudinal section of the lower blade 411 and any longitudinal section of the upper blade 421 are both of an upturned streamline type, and any longitudinal section of the external shapes of the lower blade rotating sleeve I412, the lower blade rotating sleeve II 413 and the upper blade rotating sleeve 422 which are used for being connected with the blade rotating shaft 3 is of a streamline type, so that the external side surfaces of the blade group can be ensured to be symmetrical streamline surfaces when the blade group is closed, and the resistance borne by the blade group can be reduced when the blade group is in a reverse flow state.
As shown in the operation schematic diagrams 10-13 of the vertical axis three-flow-line type automatic opening and closing water turbine, water flow (shown by an arrow on the left side in fig. 13) flows from one side at a certain speed, the lower blade 411 facing the flow is impacted by the water flow to open the blade downwards, the force applied to the upper blade 421 is opposite to the direction of the lower blade 411 to open the lower blade 411 upwards, and in the process, the impact force of the water flow on the blade in the horizontal direction is continuously increased to drive the blade to rotate to a next angle until the blade is opened to a maximum opening and closing angle limited by a corner limiting structure; when the blades rotate continuously, the force of opening the blades is gradually reduced by water flow, the blades start to close, when the blades rotate to a certain angle, the blades close rapidly and rotate continuously under the pushing of the next adjacent incident flow blade until the next incident flow, and therefore the blades can rotate continuously.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (2)
1. A vertical shaft three-flow-line type automatic opening and closing water turbine is characterized by comprising a main shaft (1), a hub (2), a blade rotating shaft (3), a blade group (4) and a limiting device, wherein the limiting device comprises a blade group axial limiting mechanism and a blade rotation limiting mechanism; the hub (2) is fixedly arranged on the main shaft (1), a plurality of blade rotating shafts (3) are uniformly and fixedly arranged on the outer circumference of the hub (2), and a blade group (4), a blade group axial limiting mechanism and a blade rotating limiting mechanism are arranged at one end, far away from the hub (2), of each blade rotating shaft (3);
the blade group (4) comprises a lower blade (411), a lower blade rotating sleeve I (412), a lower blade rotating sleeve II (413), an upper blade (421) and an upper blade rotating sleeve (422); the lower blade rotating sleeve I (412) and the lower blade rotating sleeve II (413) are fixedly arranged on one side of the lower blade (411) close to two ends, and the upper blade rotating sleeve (422) is fixedly arranged in the middle of one side of the upper blade (421); the lower blade rotating sleeve I (412), the upper blade rotating sleeve (422) and the lower blade rotating sleeve II (413) sequentially penetrate through the corresponding blade rotating shafts (3), the lower blade rotating sleeve I (412), the upper blade rotating sleeve (422) and the lower blade rotating sleeve II (413) are installed on the corresponding blade rotating shafts (3) through clearance fit, the upper blade rotating sleeve (422) is located between the lower blade rotating sleeve I (412) and the lower blade rotating sleeve II (413), the lower blade (411) is in rotating fit with the corresponding blade rotating shafts (3) through the lower blade rotating sleeve I (412) and the lower blade rotating sleeve II (413), and the upper blade (421) is in rotating fit with the corresponding blade rotating shafts (3) through the upper blade rotating sleeve (422);
the axial limiting mechanism of the blade group comprises a front streamline end (6) and a retaining ring (7), the front streamline end (6) is arranged at the outer end of the corresponding blade rotating shaft (3) and limits the lower blade rotating sleeve I (412), so that the outer end of the blade rotating shaft (3) is in a front end mushroom shape, a clamping groove (8) is arranged on the outer circumference of the blade rotating shaft (3) close to the lower blade rotating sleeve II (413), and the retaining ring (7) is clamped in the clamping groove (8) and limits the lower blade rotating sleeve II (413);
the blade rotation limiting mechanism comprises sliding blocks (423) which are respectively arranged at two ends of an upper blade rotating sleeve (422), an arc-shaped sliding groove (414) is respectively arranged on the end surface of one end, close to the upper blade rotating sleeve (422), of a lower blade rotating sleeve I (412) and on the end surface of one end, close to the upper blade rotating sleeve (422), of a lower blade rotating sleeve II (413) along the circumferential direction of the lower blade rotating sleeve I, and the sliding groove (414) limits the closing of a lower blade (411) and an upper blade (421) and the opening maximum angle of the lower blade (411) and the upper blade (421); a sliding block (423) at one end of the upper blade rotating sleeve (422) is positioned in a sliding groove (414) of the lower blade rotating sleeve I (412) and is in sliding fit with the sliding groove (414), and a sliding block (423) at the other end of the upper blade rotating sleeve (422) is positioned in a sliding groove (414) of the lower blade rotating sleeve II (413) and is in sliding fit with the sliding groove (414);
two arc-shaped sliding grooves (414) are formed in the end face, close to the upper blade rotating sleeve (422), of the lower blade rotating sleeve I (412) along the circumferential direction of the lower blade rotating sleeve I, two sliding blocks (423) are arranged on the end face, in contact with the lower blade rotating sleeve I (412), of the upper blade rotating sleeve (422) along the circumferential direction of the upper blade rotating sleeve I, and the two sliding blocks (423) at one end of the upper blade rotating sleeve (422) are located in the two sliding grooves (414) of the lower blade rotating sleeve I (412) respectively and are in sliding fit with the corresponding sliding grooves (414);
two arc-shaped sliding grooves (414) are formed in the end face, close to the upper blade rotating sleeve (422), of the lower blade rotating sleeve II (413) along the circumferential direction of the lower blade rotating sleeve II, two sliding blocks (423) are arranged on the end face, in the contact end with the upper blade rotating sleeve II (413), of the upper blade rotating sleeve (422) and the lower blade rotating sleeve II (413) along the circumferential direction of the upper blade rotating sleeve II, the two sliding blocks (423) in the end face, in the contact end with the upper blade rotating sleeve II (413), of the upper blade rotating sleeve (422) and the lower blade rotating sleeve II (413) are respectively located in the two sliding grooves (414) of the lower blade rotating sleeve II (413) and are in sliding fit with the corresponding sliding grooves (414);
an arc-shaped groove (424) which is matched with the outer circular surface of the lower blade rotating sleeve I (412) and the outer circular surface of the lower blade rotating sleeve II (413) are respectively arranged at one side, close to two ends, of the upper blade (421);
the cross sections of the upper blade (421) and the lower blade (411) are airfoil-shaped;
the longitudinal sections of the upper blade (421) and the lower blade (411) are of an upturned streamline shape;
the longitudinal section of the blade group consisting of the upper blade (421) and the lower blade (411) is streamline when closed;
the streamline is formed by smooth transition connection.
2. The vertical axis tri-flow type automatic opening and closing water turbine as claimed in claim 1, wherein the surfaces of the lower blade (411), the lower blade rotating sleeve i (412), the lower blade rotating sleeve ii (413), the upper blade (421) and the upper blade rotating sleeve (422) are provided with corrosion resistant layers.
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| CN201910256423.2A CN109931200B (en) | 2019-03-29 | 2019-03-29 | Vertical shaft three-flow-line type automatic opening and closing water turbine |
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| CN201910256423.2A CN109931200B (en) | 2019-03-29 | 2019-03-29 | Vertical shaft three-flow-line type automatic opening and closing water turbine |
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| CN114087104A (en) * | 2021-12-08 | 2022-02-25 | 青岛科技大学 | Deformable water turbine power generation device utilizing ocean current energy |
| CN114542355B (en) * | 2022-02-10 | 2023-07-18 | 国网福建省电力有限公司电力科学研究院 | Variable-pitch disc turbine type water wheel device |
| NO20220803A1 (en) * | 2022-07-17 | 2024-01-18 | Erling Magnar Haug | Energy trap 2 - Energy trap used in a windmill |
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| CN207841110U (en) * | 2018-01-15 | 2018-09-11 | 南京渝钻工具有限公司 | Pincers |
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| US2555473A (en) * | 1946-04-11 | 1951-06-05 | Mcstay Jackson Co | Hinged container |
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| CN201868611U (en) * | 2010-10-18 | 2011-06-15 | 黎秀蓉 | Rotary connecting device for card slots |
| DE102011117176A1 (en) * | 2011-10-28 | 2013-05-02 | Voith Patent Gmbh | Rotor blade for a water turbine, in particular for a tidal power plant, and method for its operation |
| CN103321825B (en) * | 2013-07-11 | 2015-06-17 | 山东大学 | Tidal current energy capturing water turbine with changeable blade gestures |
| CN205778084U (en) * | 2016-05-25 | 2016-12-07 | 张钧越 | Fast disassembly type hinge |
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| GB2459011B (en) * | 2007-10-18 | 2010-10-27 | Tsann Kuen | A grill |
| KR20070118997A (en) * | 2007-11-28 | 2007-12-18 | 황철현 | Transformable blade of turbine for tidal current power plant |
| CN201282858Y (en) * | 2008-10-29 | 2009-08-05 | 章忠平 | Chair armrest for conveniently adjusting angle |
| CN207824939U (en) * | 2017-11-26 | 2018-09-07 | 江西弘珽金属制品有限公司 | A kind of gap adjustment scissors |
| CN207841110U (en) * | 2018-01-15 | 2018-09-11 | 南京渝钻工具有限公司 | Pincers |
| CN108105014A (en) * | 2018-01-30 | 2018-06-01 | 重庆大学 | A kind of vertical axis double streamline automatic folding type hydraulic turbine |
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