TWI793349B - flow vane device - Google Patents

Abstract

The utility model relates to a flow vane device, which can be driven to rotate by flow force, and includes a rotating shaft extending up and down, and at least one driving and rotating mechanism connected to the rotating shaft. The at least one driving mechanism includes several blade modules, each blade module has two support rods connected to the rotating shaft, at least one blade unit that can swing relative to the support rods, and the number corresponds to the at least one blade unit and can prevent the at least one vane unit from swinging, the at least one vane unit has a first vane pivotally connected to the support rods, and a second vane connected to the first vane, the at least one vane unit It can be switched between a shielding state in which the first blade is shielded between the support rods, and a disengagement state in which the first blade swings away from the support rods so that the support rods can be penetrated.

Description

flow vane device

The present invention relates to a flow vane device, in particular to a flow vane device driven by flow force to extract flow kinetic energy.

The main structure of the existing vertical axis flow power generation device is a rotating shaft and several blades connected to the rotating shaft. The blades can capture the kinetic energy of the flow to drive the rotating shaft to rotate. According to the extension direction of the rotating shaft, it can be divided into two types: the horizontal type and the vertical type, and the above two types of vertical axial flow power generation devices will face one side of the rotating shaft when they are driven by the flow force. The forward side that drives the rotation in the same direction as the rotation, and the reverse side where the flow force direction is opposite to the rotation direction affects the rotation of the shaft. To improve the efficiency of flow power generation, it is necessary to reduce the time when the blades turn to the reverse side. withstand resistance.

Taiwan patent I616590 discloses a flow vane device, which includes a rotating shaft and several vane modules. Each blade module includes a grid-type blade connected with the shaft and provided with several blade spaces, and several swingable blades hanging from the grid-type blade and corresponding to the blade spaces respectively. When the blade module turns to the forward side, the swing blades respectively cover the blade spaces to form a complete force bearing surface. When the blade module turns to the reverse side, the swing blades allow the flow Force passes through these blade spaces, thereby reducing drag.

This grid-type vane combined with the swinging vane constitutes a structure that shields on the forward side and separates on the reverse side. It is applied to a vertical vertical axis flow power generation device. In the case of a large flow force, these swinging The blades will be lifted up by the centrifugal force, and cannot fall down in time to cover the blade space when the blade module is on the forward side, and the flow kinetic energy cannot be effectively captured on the forward side. Therefore, in the vertical flow power generation device of the vertical type, and It is not suitable to use the above structure to reduce the resistance on the reverse side.

The object of the present invention is to provide a flow vane device capable of overcoming at least one disadvantage of the prior art.

Therefore, a flow vane device of the present invention can be driven by flow force to rotate in a running direction, and includes a rotating shaft and at least one set of driving and rotating mechanisms. The rotating shaft extends vertically up and down. The at least one set of driving mechanism includes several blade modules connected to the rotating shaft, each blade module has two supporting rods connected to the rotating shaft and spaced up and down, and at least one blade unit connected between the supporting rods , and the number corresponds to the at least one blade unit and is connected to the resisting units of the support rods, each blade module defines a front side facing away from the running direction, and a rear side opposite to the front side, the at least one blade The unit has a first blade that is pivotally connected between the support rods and extends toward the direction of the rotating shaft, and a second blade that is connected to the extended end side of the first blade and extends toward the front side, and the at least one blocking The unit can be used by the at least one blade unit, and the at least one blade unit of each blade module can be switched between a blocking state and a disengagement state. In the blocking state, the first blade is attached to the at least one block The abutment unit is shielded between the support rods. In the disengaged state, the first blade swings away from the at least one abutment unit, so that the area between the support rods can be penetrated.

The effect of the present invention is that: when the blade modules are blown by the flow force, the at least one blade unit of the blade module on the reverse side will be switched to the disengaged state, reducing the reverse resistance, and the blade module along the When the running direction is turned to the forward side, the first blade will be affected by the flow force and approach the support rods, so that the blade unit can be switched to the shielding state in time when it is on the forward side, and When the at least one blade unit is in the shielding state, the second vane can capture the flow force flowing toward the rotating shaft, thereby increasing the efficiency of the at least one blade unit to capture the flow force.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to Figures 1 and 2, a first embodiment of the flow vane device of the present invention can be driven by a flow force F to rotate in a running direction T. The flow vane device includes a rotating shaft 1 vertically extending up and down, and a set of driving and rotating mechanisms 2 connected to the rotating shaft 1 .

The driving mechanism 2 includes two blade modules 21 connected to the rotating shaft 1 at equal angular intervals. Each blade module 21 has two supporting rods 211 connected to the rotating shaft 1 at intervals up and down and extending horizontally from the rotating shaft 1, a blade unit 212 connected between the extension ends of the supporting rods 211, and a blade unit 212 connected to the The abutment unit 213 of the support rods 211 and two reinforcement rods 214 that are interlaced and fixed to each other and extend obliquely up and down are connected between the support rods 211 .

Each blade module 21 defines a front side 22 facing away from the running direction T, and a rear side 23 opposite to the front side 22. The first blade 241 extending from the shaft 1 , and a second blade 242 fixed to the extended end side of the first blade 241 and extending toward the front side 22 cannot be oscillated relative to each other.

The abutment unit 213 has an upper stopper 251 connected to the upper support rod 211 and protruding downward from the bottom edge of the support rod, and a lower stopper 252 connected to the lower support rod 211 and protruding upward from the top edge of the support rod . The upper block 251 cooperates with the lower block 252 for the first vane 241 to abut against, so that the vane unit 212 cannot swing from the front side 22 to the rear side 23 between the support rods 211 .

The blade unit 212 of each blade module 21 can be switched between a shielding state and a disengagement state. In the shielding state, the first blade 241 abuts against the upper stopper 251 and the lower stopper 252 to shield Between these support rods 211, it can be used to harvest flow kinetic energy. In the disengaged state, the first vane 241 swings away from the resisting unit 213 and cannot be used to effectively capture fluid kinetic energy.

When the first embodiment is in use, it can be used with a generator (not shown) connected to the rotating shaft 1 . Since the structure and operation of the blade modules 21 are the same, the operation mode of the blade module 21 located on the left of the rotating shaft 1 in FIG. 1 is taken as an example for illustration.

When driven by the flow force F, the front side 22 of the vane module 21 is facing the flow direction of the flow force F, and the first vane 241 will be driven by the flow force F and lean against the upper stopper 251 and the The lower block 252, the vane unit 212 will be in the shielding state and can be used to extract fluid kinetic energy, the second vane 242 can extract fluid kinetic energy flowing from the side of the first vane 241 to the rotating shaft 1, And it can assist to drive the first vane 241 to abut against the stoppers 251, 252, so as to increase the extraction performance of the flow force F.

During the rotation of the blade module 21 to the right of the rotating shaft 1 along the running direction T, the blade unit 212 is simultaneously affected by the centrifugal force and the flow force F to swing relative to the support rods 211. When the blade The module 21 gradually rotates to the right, and the force of the flow force F acting on the blade unit 212 gradually decreases, so that the blade unit 212 is driven by the centrifugal force and gradually moves away from the blocking unit 213, and the blade module 21 rotates When it reaches the right side of the rotating shaft 1, the first blade 241 swings until its extension direction tends to be parallel to the flow direction of the flow force F, thereby reducing the flow force F applied to the blade module 21 and causing the opposite The acting force in the running direction T further improves the efficiency of collecting the flow force F of the flow vane device.

Next, when the blade module 21 continues to rotate along the running direction T from the right side of the rotating shaft 1 to the front side of the rotating shaft 1, the first blade 241 is driven by the flow force F to keep its extending direction consistent with the flow force F. The flow direction tends to be parallel, and then gradually approaches the support rods 211, so when the blade module 21 rotates to the left of the rotating shaft 1, the blade unit 212 can switch to the shielding state in time to withstand The flow force F drives the rotating shaft 1 to rotate.

Referring to FIGS. 3 and 4 , the second embodiment of the flow vane device of the present invention differs from the first embodiment in the structure of the vane unit 212 .

In the second embodiment, the vane unit 212 of each vane module 21 has a first vane 241 pivotally connected between the support rods 211 vertically and axially, and a first vane 241 pivotally connected vertically and axially to the first The vane 241 is opposite to the second vane 242 connected to the other side of the support rods 211 , and two guide members 243 respectively connected to the support rods 211 and protruding outwards against the running direction T. When the blade module 21 is in the shielding state (as shown in the blade unit 212 on the left side of FIG. 4 ), the second blade 242 is limited by the guides 243 and turns to extend toward the front side 22, which can be extracted from the first blade. The kinetic energy of a blade 241 flowing sideways toward the rotating shaft 1 can assist and drive the first blade 241 to abut against the blocks 251 and 252 to increase the extraction performance of the fluid force F. When the vane module 21 rotates along the running direction T to the disengaged state, the first vane 241 is affected by the centrifugal force and the flow force F to swing away from the blocking unit 213 . Simultaneously, the second blade 242 also breaks away from the limit of the guides 243, and then can swing relative to the first blade 241. When the blade module 21 turns to the right of the rotating shaft 1, the second blade 242 is affected by the centrifugal force and the flow force F so that its extension direction tends to be parallel to the flow direction of the flow force F, so that it will not constitute resistance. Compared with the first embodiment, it can be compared with the first embodiment. When the second blade 242 of the first blade 241 is on the right side of the rotating shaft 1 , the flow force F exerted on the blade module 21 is further reduced to cause a force opposite to the running direction T.

It should be noted that the number of vane units 212 and resisting units 213 of each vane module 21 is not limited to one. Referring to FIG. 5 , in a variation of the second embodiment, each vane module 21 There are two vane units 212 arranged at intervals along the extending direction of the support rods 211, and two abutment units 213 respectively corresponding to the vane units 212. The kinetic energy of the flow force is captured to drive the rotating shaft 1, and the right side of the rotating shaft 1 can be penetrated by the flow force F to reduce the rotation resistance.

In addition, the driving mechanism 2 is not limited to one group. Referring to FIG. 6, in another variation of the second embodiment, the flow vane device includes two driving mechanisms arranged at intervals along the axial direction of the rotating shaft 1. The rotating mechanism 2, and the axial projections of the blade modules 21 along the rotating shaft 1 are not overlapped with each other, and have a larger force bearing area compared with the second embodiment. Of course, the driving and rotating mechanisms 2 spaced up and down can also be completely superimposed along the axial projection of the rotating shaft 1 to increase the force bearing area of the flow vane device, and the implementation is not limited thereto.

It should be added that two spoilers (not shown) covering the upper and lower sides of the blade unit 212 can also be added on the section of the support rods 211 corresponding to the blade unit 212, so that the The upper and lower sides of the vane unit 212 are not affected by the turbulent flow. Since the anti-spoiler plate is not the key point of the present invention, it will not be described again.

Referring to FIG. 7 , a third embodiment of the flow vane device of the present invention differs from the first embodiment in that: the structures of the support rods 211 and the resisting unit 213 .

Referring to Figures 8 and 9, in the third embodiment, the support rod 211 above each blade module 21 is provided with an upper through groove 201 radially extending up and down, and the upper through groove 201 has an upper Extending obliquely downward toward the shaft 1 and radially through the upper chute portion 203 of the support rod 211 , a first chute connected to the side of the upper chute portion 203 away from the shaft 1 and exposed to the bottom side of the support rod 211 . An upper accommodating portion 204 , and a second upper accommodating portion 205 extending axially along the support rod 211 and communicating with the bottom end of the upper chute portion 203 near the rotating shaft 1 .

The blocking unit 213 has an upper stopper 251 that can move up and down through the upper groove 201 and protrudes downward from the support rod 211, and an upper stopper 251 that can move axially relative to the upper support rod 211. The upper stop block 261 of the second upper accommodating portion 205 . The upper stopper 251 is able to move up and down through the upper groove 201, and has an upper head whose outer diameter is larger than the aperture of the upper chute portion 203 and leans against the top side of the support rod 211. 253. An upper column portion 254 extending downward from the upper head portion 253 through the upper chute portion 203, and an upper column portion 254 extending from the bottom end of the upper column portion 254 in a direction away from the rotating shaft 1 and located below the support rod 211 There is a rod-shaped upper abutment portion 255 , and the upper abutment portion 255 can be inserted into the first upper accommodating portion 204 upwards.

Referring to Figures 10 and 11, the support rod 211 below each blade module 21 is provided with a lower through groove 202 radially extending up and down, and the lower through groove 202 has a direction inclined from bottom to top toward the rotating shaft 1. Extending and radially penetrating through the lower chute portion 206 of the support rod 211, a first lower accommodating portion 207 communicating with the top of the lower chute portion 206 away from the side of the rotating shaft 1 and exposed to the bottom side of the support rod 211, and a second lower accommodating portion 208 extending axially along the support rod 211 and communicating with the first lower accommodating portion 207 .

The blocking unit 213 also has a lower block 252 that can move up and down through the lower through groove 202 and protrudes upward from the support rod 211, and a lower block 252 that can move to the second lower accommodating portion 208. The lower stop block 262 of the first lower accommodating portion 207 . The lower block 252 has a lower head portion 256 whose outer diameter is larger than the aperture of the lower chute portion 206, a lower column portion 257 extending upwardly through the lower chute portion 206 from the lower head portion 256, and a lower column portion 257 formed by the lower head portion 256. The bottom end of the lower column portion 257 extends away from the rotating shaft 1 , and is supported by the lower stop block 262 to protrude upward from the lower stop portion 258 of the support rod 211 .

The blocking unit 213 can be switched between a blocking state and a release state. In the blocking state, the upper stop block 261 is located at the second upper accommodating portion 205, and the upper block of the upper block 251 The abutment portion 255 protrudes downward from the bottom side of the support rod 211 above, and the lower stop block 262 is located in the first lower accommodating portion 207 for the lower abutment portion 258 of the lower stop block 252 to abut downwardly, The lower abutment portion 258 protrudes upward from the top side of the support rod 211 below, so that the upper abutment portion 255 and the lower abutment portion 258 can cooperate to allow the first blade 241 to swing back to a limit. position, so that the blade module 21 is positioned in the blocking state.

Referring to Figures 12-15, when the abutment unit 213 is in the released state, the upper abutment portion 255 of the upper stopper 251 moves upward to the first upper accommodating portion 204, and the upper stopper 261 moves along the The support rod 211 moves axially toward the upper chute portion 203 to the bottom of the upper abutment portion 255 for the upper stopper 251 to lean against downwards so that the upper stopper 251 does not protrude downward from the bottom of the support rod 211 above. side; in addition, the lower stop block 262 moves to the second lower accommodation portion 208, and no longer supports the lower abutment portion 258, and the lower abutment portion 258 moves downward to the first lower accommodating portion 207, instead of protruding upward from the top side of the supporting rod 211 below. At this time, the upper blocking portion 255 and the lower blocking portion 258 no longer block the first blade 241 , so that the first blade 241 can freely pivot between the supporting rods 211 .

When the third embodiment is in use, when the flow force F is greatly increased, for example, when encountering a typhoon, the rotation speed of the driving mechanism 2 increases, and the upper stopper 251 will be subjected to a large centrifugal force and move away from it. The direction of the rotating shaft 1 moves, thus moving upward along the upper chute portion 203. When the upper blocking portion 255 completely enters and accommodates the first upper accommodating portion 204, the upper stop block 261 is also subjected to centrifugal force. As a result, the second upper accommodating portion 205 originally accommodated moves toward the upper chute portion 203 , thereby preventing the upper stopper 251 from sliding downward. At the same time, the lower stop block 262 is also moved from the first lower accommodating portion 207 to the second lower accommodating portion 208 under greater centrifugal force, so it does not support the lower blocking portion 258, so that the The lower block 252 moves downward along the lower slot 202 .

At this time, the resisting unit 213 has been switched to the released state, and the first blade 241 can freely rotate with the flow force, preventing the first blade 241 from violently hitting the blocks 251 due to being driven by the excessive flow force , 252 and damaged.

When the flow force F returns to an appropriate size, the upper stop block 261 can be manually moved back to the second upper accommodating portion 205, so that the upper stop block 251 moves downward to protrude from the upper stop block 251. support rod 211, and move the lower block 252 upwards to protrude from the support rod 211 below, and move the lower stop block 262 to the first lower accommodating portion 207 to support the lower blocking portion 258, The blocking unit 213 is switched to the blocking state. Of course, in practice, the upper stop block 261 and the lower stop block 262 can also be connected through a rope, and the upper stop block 261 and the lower stop block 262 can be pulled toward the direction of the rotating shaft 1 so that the blocking unit 213 can move from The releasing state is switched to the blocking state, since there are many ways to switch the blocking unit 213 from the releasing state to the blocking state, so no examples are given one by one.

It should be added that in this third embodiment, the blade units 212 are grid structures, and are connected to the grid rods with soft sheets made of canvas, graphene or other polymer materials, so that the blade units 212 The blade unit 212 is lighter in weight and still retains the function of capturing fluid kinetic energy, but the implementation is not limited thereto.

To sum up, the effect of the flow vane device of the present invention lies in that: the vane unit 212 tends to be parallel to the shaft 1 and is axially pivoted to the support rods 211, and cooperates with the resisting unit 213 to move the vane When the module 21 turns to the forward side, it can immediately switch to the shielding state to withstand the flow force F, which improves the efficiency of fluid kinetic energy extraction and prevents the blade unit 212 from being unable to switch to the shielding state due to centrifugal force. The second vane 242 can extract the fluid dynamic energy flowing from the side of the first vane 241 to the rotating shaft 1 , and can assist in driving the first vane 241 to abut against the stoppers. The blocking unit 213 can be switched between the blocking state and the release state, and when the flow force F is too large, the vane unit 212 can rotate with the direction of the flow force without restriction, reducing the damage of the vane unit 212 Risk, therefore, does achieve the object of the present invention.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

1: Shaft 2: Drive and turn mechanism 201: top wear slot 202: Bottom wear groove 203: Upper chute 204: The first upper storage part 205: the second upper accommodation part 206: Lower chute 207: The first storage unit 208: The second lower storage part 21: Blade module 211: support rod 212: blade unit 213: block unit 214: Reinforcing rod 22: front side 23: Rear side 241: first blade 242: second blade 243: guide parts 251: Upper block 252: Lower block 253: upper head 254: upper column part 255: upper block 256: lower head 257: lower column part 258: Lower stop 261: Upper stop block 262: Lower stop block F: fluidity T: running direction

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is an incomplete perspective view of a first embodiment of the flow vane device of the present invention; Fig. 2 is a schematic top view of the first embodiment, illustrating a driving mechanism rotating along a running direction; Fig. 3 is an incomplete perspective view of a second embodiment of the flow vane device of the present invention; Fig. 4 is a schematic top view of the second embodiment, illustrating a driving mechanism rotating along the running direction; Figure 5 is a view similar to Figure 4 illustrating a variant of the second embodiment; Fig. 6 is an incomplete perspective view of another modification example of the second embodiment; Fig. 7 is an incomplete perspective view of a third embodiment of the flow vane device of the present invention; Fig. 8 is an incomplete side sectional view of an upper support rod of the third embodiment, illustrating the relative relationship between an upper stopper and the upper support rod when a blocking unit is in a blocking state; Fig. 9 is an incomplete cross-sectional view of the upper support rod from another angle of view of the third embodiment, illustrating the relative relationship between the upper stopper and the upper support rod when the abutment unit is in the abutment state relation; Fig. 10 is an incomplete cross-sectional view of a lower support rod of the third embodiment, illustrating the relative relationship between the lower stopper and the lower support rod when the abutment unit is in the abutment state; Fig. 11 is an incomplete cross-sectional view of the lower support rod from another angle of view of the third embodiment, illustrating the relative relationship between the lower stopper and the lower support rod when the abutment unit is in the abutment state ; Fig. 12 is a view similar to Fig. 8, illustrating the relative relationship between the upper block and the support rod above when the abutment unit is in a released state; Fig. 13 is a view similar to Fig. 9, illustrating the relative relationship between the upper block and the upper support rod when the abutment unit is in the released state; Fig. 14 is a view similar to Fig. 10, illustrating the relative relationship between the lower stopper and the lower support rod when the abutment unit is in the released state; and FIG. 15 is a view similar to FIG. 11 , illustrating the relative relationship between the lower stopper and the lower supporting rod when the abutting unit is in the released state.

1: Shaft

2: Drive and turn mechanism

21: Blade module

211: support rod

212: blade unit

213: block unit

214: Reinforcing rod

22: front side

23: Rear side

241: first blade

242: second blade

251: Upper block

252: Lower block

F: fluidity

T: running direction

Claims (8)

A flow vane device, which can be driven by flow force to rotate in a running direction, and includes: a rotating shaft extending vertically up and down; and at least one set of driving and rotating mechanisms connected to the rotating shaft, which can be driven by flow force and transmit The rotating shaft rotates, and the at least one driving mechanism includes several blade modules connected to the rotating shaft. Each blade module has two supporting rods connected to the rotating shaft and spaced up and down. At least one of the supporting rods is connected between the supporting rods. blade units, and the number of abutment units corresponding to at least one blade unit and connected to the support rods, each blade module defines a front side facing away from the running direction, and a rear side opposite to the front side, the At least one blade unit has a first blade that is pivotally connected between the support rods and extends toward the direction of the rotating shaft, and a second blade that is connected to the extended end side of the first blade and extends toward the front side. A blocking unit can be used by the at least one blade unit, and the at least one blade unit of each blade module can be switched between a blocking state and a disengagement state. In the blocking state, the first blade leans back The at least one resisting unit can be used to capture fluid kinetic energy and shield between the supporting rods. In the disengaged state, the first blade swings away from the resisting unit, so that the distance between the supporting rods The area can be penetrated; each blade unit also has two guide pieces respectively connected to the support rods and protruding toward the front side, each second blade is axially pivoted to the respective first blade up and down, It can swing relative to the first vane. When the at least one vane unit of each vane module is in the shielding state, the first vane leans against the at least one resisting unit, and the second vane is guided by the guides. piece limit Extends toward the front side. The fluid blade device according to claim 1, wherein each blade module has several blade units arranged at intervals along the extending direction of the support rods, and several blade units can be respectively used for the blade units to abut against the resisting unit. The flow vane device according to claim 1, wherein the at least one abutment unit of each vane module has an upper stopper connected to the upper support rod and protruding downward, and a lower support rod connected and A lower stop protruding upwards, the upper stop and the lower stop can cooperate to allow the first vane of the at least one vane unit in the shielding state to lean back against the limit position. The flow vane device as claimed in claim 1, wherein, the upper support rod of each vane module is provided with a number of upper passage slots corresponding to the at least one vane unit, and the at least one resisting unit has a ground that can move up and down. The at least one abutment unit can be in a abutment state with Switching between a release state, when the at least one abutment unit is switched from the abutment state to the release state, the upper stopper is displaced upward relative to the respective support rod and can no longer be used for the first blade to move forward The back swing is limited. The flow vane device as claimed in claim 4, wherein the at least one abutment unit further has an upper stop block that is movably arranged in the at least one upper passage groove along the extending direction of the support rods, and the at least one An upper through groove has an upper chute portion obliquely extending from top to bottom toward the rotating shaft, a first upper accommodating portion connected to the bottom end of the upper chute portion and exposed downward, and a first upper accommodating portion connected to the upper chute portion. The chute part and the second upper accommodating part for the upper stop block to accommodate, the upper stopper has a top side of the respective support rod and the outer diameter is larger than the hole diameter of the upper chute part The upper head, an upper column extending downwardly through the upper chute from the upper head, and an upper column bent from the bottom end of the upper column and extending along the lengthwise direction of the support rod and can be used for upward insertion For the upper abutment portion of the first upper accommodating portion, when the at least one abutment unit is switched from the abutment state to the release state, the upper stopper moves upward relative to the respective support rods, so that the upper The abutting portion is inserted upward into the first upper accommodating portion, and the upper stop block is displaced from the second upper accommodating portion to the upper chute portion to abut against the lower portion of the upper abutting portion. The flow vane device according to any one of claims 1, 4, and 5, wherein the supporting rods below each vane module are provided with a number of underpassing slots corresponding to the at least one vane unit, and the at least one stop The abutment unit has a lower stopper that can move up and down through the at least one lower penetration groove and protrudes upward from the support rod, and can be used for the first blade to swing back and limit the position. The at least one abutment unit It can be switched between a block state and a release state. When the at least one block unit is switched from the block state to the release state, the lower block is displaced downward relative to the respective support rod and cannot be moved any further. It is used for the first blade to swing back to limit. The flow vane device according to claim 6, wherein the at least one abutment unit further has a lower stop block which is movable along the extension direction of the support rods and is arranged in the at least one lower through groove, and the at least one lower The through groove has a lower chute extending obliquely from bottom to top toward the rotating shaft, and a first lower accommodating portion connected to the side of the top of the lower chute away from the rotating shaft and for accommodating the lower stop block. part, and a second lower accommodating part communicating with the first lower accommodating part, the lower block has a lower head which is located at the bottom side of the respective support bar and whose outer diameter is larger than that of the lower chute part, one extending upwards from the lower head through the lower chute The lower column portion, and a lower abutting portion that is bent from the top end of the lower column portion and extends along the lengthwise direction of the support bar and is supported by the lower stop block to protrude from the support bar. When the at least one abutment unit When switching from the abutment state to the release state, the lower stop block is displaced from the first lower accommodating portion to the second lower accommodating portion and no longer supports the lower abutment portion, so that the lower stop block The supporting rod is displaced downward to the first lower accommodating portion without protruding upward. The flow vane device as claimed in claim 1, comprising a plurality of driving and rotating mechanisms connected to the rotating shaft and axially spaced along the rotating shaft.

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