CN107701350B - Fluid power generation device with stable power generation - Google Patents
Fluid power generation device with stable power generation Download PDFInfo
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- CN107701350B CN107701350B CN201711038329.7A CN201711038329A CN107701350B CN 107701350 B CN107701350 B CN 107701350B CN 201711038329 A CN201711038329 A CN 201711038329A CN 107701350 B CN107701350 B CN 107701350B
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- power generation
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- rotating wheel
- blade
- generation device
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- 239000012530 fluid Substances 0.000 title claims abstract description 124
- 238000010248 power generation Methods 0.000 title claims abstract description 92
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention relates to the technical field of pipeline power generation, and discloses a fluid power generation device with stable power generation. The fluid power generation device comprises a generator set and a rotating wheel; the rotating wheel is connected with a rotor of the generator set through a rotating shaft; the rotating wheel comprises a blade, an upper base and a lower base; the two ends of the blade are fixedly connected with the rotating shaft through an upper base and a lower base, and the two connecting positions of the upper base and the lower base and the same blade are not on the same vertical line; the blades are uniformly distributed around the shaft. The invention improves the adaptability to the change of the fluid flow velocity on the basis of not increasing the volume by designing the shape of the rotating wheel, the shape and the position of the blade and combining the large rotating wheel and the small rotating wheel; and innovatively utilizing the swing mechanism to adaptively change the fluid flow rate through the fluid power generation device and the magnitude of the applied force to the fluid; the movable plate is added in the rotating wheel, and the movable plate can be self-adaptive to water flow for action. The invention has good power generation stability.
Description
Technical Field
The invention relates to the technical field of pipeline power generation, in particular to a fluid power generation device with stable power generation.
Background
In the prior art, a spherical rotating wheel is adopted to generate electricity by water flow, and the rotating wheel is directly pushed to rotate by utilizing the acting force of fluid, so that an electromagnetic induction generator is driven to generate electricity. However, the related design is not specifically carried out for the water flow to be large or small in the prior art, and particularly when the water flow is large, large impact is generated on the rotating wheel, and the rotating wheel is possibly damaged; meanwhile, due to the non-uniformity of water flow, when flowing through the rotating wheel, the electromagnetic induction generator generates electricity unstably and directly influences the service life of the electric appliance.
Disclosure of Invention
The present invention is directed to a fluid power generation device capable of solving the problems that the service life of power generation equipment and the power generation quality are affected by unstable power generation due to abrupt change of the rotation speed of blades caused by abrupt increase or decrease of the flow rate.
In order to solve the technical problems, the technical scheme of the invention is as follows:
Providing a fluid power generation device with stable power generation, wherein the fluid power generation device comprises a generator set and a rotating wheel; the rotating wheel is connected with a rotor of the generator set through a rotating shaft; the rotating wheel comprises a blade, an upper base and a lower base; the two ends of the blade are fixedly connected with the rotating shaft through an upper base and a lower base, and the two connecting positions of the upper base and the lower base and the same blade are not on the same vertical line; the blades are uniformly distributed around the shaft.
Compared with a common power generation device with spherical rotating wheels, the power generation device provided by the invention has the advantages that the positions of the blades are set, the rotating wheels which are symmetrical to the blades are twisted by a certain angle, and the upper hemisphere, the lower hemisphere, the left hemisphere and the right hemisphere are asymmetric. Because of the special design of the blades, the fluid can more comprehensively contact the blades, and the utilization rate of the fluid is improved. Compared with the prior art, the invention can reduce the speed of the main shaft speed reduction under the condition of reduced fluid flow or reduced flow speed, thereby relieving the unstable power generation.
Further, the device also comprises a swinging mechanism which can support the fluid power generation device to vertically swing relative to the axial direction of the fixed shaft; the fixed shaft is fixed on a supporting seat, and the fixed shaft is arranged in a direction which is perpendicular to the fluid flowing direction when the fluid power generation device swings to the lowest position. In general, when the flow rate of the fluid increases or the flow velocity becomes large, the impact force of the fluid on the blades becomes large, resulting in an abrupt increase in the spindle rotation speed, leading to unstable power generation. When the flow rate of the fluid is increased or the flow velocity of the fluid is increased, the fluid pushes the fluid power generation device to vertically swing along the axial direction of the fixed shaft along with the swinging mechanism, so that the fluid power generation device swings from a position vertical to water flow to a position forming an inclination angle with the original position, and the larger the thrust of the fluid is, the larger the inclination angle is. This causes a portion of the fluid to flow out of the angled gap and the flow through the fluid power generation device to decrease; and the force of the fluid flowing through the fluid power generation device on the fluid power generation device is no longer perpendicular to the fluid power generation device, but a component of the force does useful work on the fluid power generation device. Thus, the force exerted by the fluid on the blade decreases and the speed at which the rotational speed of the main shaft increases decreases. When the flow rate or the flow velocity of the fluid is reduced, the fluid power generation device gradually returns to the original position from the inclination angle position along with the reduction of the acting force of the fluid, and similarly, the fluid lost from the inclination angle clearance is reduced, and the effective acting force of the fluid which is not lost on the blades is gradually increased, so that the degree of influence of the reduction of the flow rate or the flow velocity of the fluid on the rotating speed of the rotating shaft of the fluid power generation device is reduced. The fluid power generation device can effectively relieve the influence of fluid flow change or flow velocity change on power generation stability.
Preferably, the swinging mechanism comprises a swinging rod with one end sleeved on the fixed shaft and the other end fixedly connected with the generator set, and a return spring for limiting the swinging position of the generator set, and the return spring is connected on the fixed shaft. The invention realizes the swing of the fluid power generation device by utilizing the interaction of the elastic force of the return spring and the fluid thrust, thereby automatically changing the rotating speed of the blade in an applicable way so as to realize the purpose of stable power generation.
Further, the cross section of the blade is triangular; one vertex angle of the triangle extends towards the radial outer side of the rotating wheel, and the corresponding bottom edge is perpendicular to the diameter of the cross section of the rotating wheel. When the fluid impacts the blades, the fluid is guided to impact both sides of the apex angle by the apex angle of the triangle extending radially outward of the rotor; because the bottom edge of the triangular cross section of the blade is perpendicular to the diameter of the cross section of the rotating wheel, when fluid passes through the blades of one half of the rotating wheel, the effective acting force on the blades of the other half can be effectively improved.
Preferably, in order to further improve the flow guiding effect, the cross section of the blade is similar to a triangle, three vertex angles of the similar triangle are rounded angles, and a bottom edge corresponding to the vertex angle extending outwards of the rotating wheel is concave towards the triangle; the other two sides are outwards convex towards the triangle.
Preferably, the upper base blade connecting points are in one-to-one correspondence with the lower base blade connecting points, and the two corresponding connecting points are positioned on the same vertical line; one end of the same blade is connected with one connecting point of the upper base, and the other end is connected with the adjacent connecting point of the corresponding lower base connecting point.
In order to further improve the stability of the fluid power generation device in the working conditions of small flow and small flow speed, a small rotating wheel is arranged inside the rotating wheel; the small rotating wheel is consistent with the rotating wheel in structure; the blades of the small rotating wheels are staggered with the rotating wheel blades.
Preferably, a movable sheet is arranged between the blade and the rotating shaft; the movable piece is connected between the blade and the rotating shaft through a transverse shaft transversely arranged between the blade and the rotating shaft, and a torsion spring is fixedly arranged on the transverse shaft and connected with the movable piece.
Another object of the present invention is to provide a pressure reducing valve to which the above-described fluid power generation device that generates electricity stably is applied. The pressure reducing valve comprises a pressure reducing valve body and a battery assembly arranged outside the pressure reducing valve body, wherein the power generating assembly is connected with the battery assembly; the fluid power generation device is arranged in the valve body of the pressure reducing valve and provides electric energy for the valve body of the pressure reducing valve.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides a fluid power generation device with stable power generation, which can effectively cope with the situation of abrupt change of fluid flow or flow velocity. Through the design of the shape of the rotating wheel and the shape and the position of the blade, the adaptability to the change of the fluid flow velocity is improved on the basis of not increasing the volume by combining the large rotating wheel and the small rotating wheel; the swing mechanism is utilized to adaptively change the flow rate of the fluid passing through the fluid power generation device and the magnitude of the acting force of the fluid; the movable plate is added in the rotating wheel, and the movable plate can be self-adaptive to water flow for action. The invention has simple structure, convenient installation and good power generation stability.
Drawings
Fig. 1 is a schematic diagram of a fluid power generation device for generating stable power in embodiment 1.
Fig. 2 is a schematic view of a cross-section of a blade in a triangle-like configuration.
Fig. 3 is a schematic structural diagram of a stable power generation fluid power generation device according to embodiment 2.
Fig. 4 is a schematic structural diagram of a stable power generation fluid power generation device of example 4.
Fig. 5 is a partial cross-sectional view of a pressure reducing valve to which a power generation stabilized fluid power generation device of example 5 is applied.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
For the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention. The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the present embodiment provides a fluid power generation device that is stable in power generation. The fluid power generation device comprises a generator set 1 and a rotating wheel 2; the rotating wheel 2 is connected with a rotor of the generator set 1 through a rotating shaft 3; the rotating wheel 2 comprises blades, an upper base 4 and a lower base 5; the two ends of the blade are fixedly connected with the rotating shaft 3 through the upper base 4 and the lower base 5, and the two connecting positions of the upper base 4 and the lower base 5 and the same blade are not on the same vertical line; the blades are evenly distributed around the shaft 3.
As shown in fig. 2, the cross section of the blade is triangular-like. The three vertex angles of the triangle-like structure are fillets, and the bottom edge 23 corresponding to the vertex angle 21 extending outwards of the rotating wheel is concave inwards of the triangle; the other two sides are outwards convex towards the triangle.
The number of blades is set according to different specific applications.
The upper base blade connecting points are in one-to-one correspondence with the lower base blade connecting points, and the two corresponding connecting points are positioned on the same vertical line; one end of the same blade is connected with one connecting point of the upper base, and the other end is connected with the adjacent connecting point of the corresponding lower base connecting point.
Example 2
As shown in fig. 3, this embodiment is different from embodiment 1 in that a small wheel 8 is provided inside the wheel 2; the small rotating wheel 8 is consistent with the rotating wheel 2 in structure; the blades of the small rotating wheel 8 are staggered with the blades of the rotating wheel 2. The material of the small wheel may be selected to be lightweight.
When the fluid flow is constant and the flow speed is normal, the small rotating wheel 8 and the rotating wheel 2 rotate under the impact of the fluid, so that the rotating shaft 3 is driven to rotate, and compared with the main shaft rotation of the embodiment 1, the embodiment 2 increases the thrust of the fluid on the blades by increasing the contact surface of the small rotating wheel 8 and the fluid, and increases the rotating speed of the main shaft 3. When the fluid flow is reduced and the flow speed is reduced, the small rotating wheel 8 is provided with the blades which are staggered with the blades of the rotating wheel 2, so that the water flow flowing through the rotating wheel 2 can flow through the small rotating wheel, the utilization rate of the water flow is improved, and the influence on the fluid power generation device when the flow speed is too low is reduced. The fluid power generation device of the present embodiment can reduce the degree of influence of the reduction in fluid flow rate or the reduction in flow velocity on power generation, and the speed of influence, relative to other general power generation devices.
In this embodiment, the small rotating wheel 8 is skillfully arranged inside the rotating wheel 2, so that the problem of unstable power generation caused by the decrease of the flow rate can be solved, and the volume of the fluid power generation device can be ensured not to be increased as much as possible.
Example 3
The present embodiment is different from embodiment 1 in that a movable piece 7 is provided between the blade and the rotating shaft 3; the movable sheet 7 is connected between the blade and the rotating shaft through a transverse shaft transversely arranged between the blade and the rotating shaft, and a torsion spring 6 is fixedly arranged on the transverse shaft, and the torsion spring 6 is connected with the movable sheet. The number of the movable plates 7 can be specifically set according to the number of the blades so as to ensure that the mass distribution of the rotating wheel is uniform.
When the fluid flow is constant and the flow speed is normal, the contact surface between the movable piece 7 and the fluid is increased, so that the thrust of the fluid on the main shaft is increased, and the rotation speed of the main shaft is increased. The movable piece swings along the transverse axis and simultaneously revolves along with the rotation of the main shaft driven by the blades.
When the flow rate of the fluid increases or the flow velocity becomes faster, the thrust of the fluid blade becomes greater, and when the thrust is greater than the resilience force of the torsion spring 6 on the movable piece 7, the movable piece 7 is pushed from the position perpendicular to the water flow direction to an inclination angle with the perpendicular position, so that the fluid part which originally pushes the movable piece 7 flows out from the inclination angle gap, thereby reducing the thrust of the fluid to the blade, reducing the acceleration of the rotation speed of the main shaft 3, and reducing the negative influence of the increase of the flow rate of the fluid or the faster flow velocity on the power generation stability.
Example 4
This embodiment differs from embodiments 1 to 3 in that the rotor wheel is placed inside the pipe and the generator set is placed outside the pipe. The generator set is arranged outside the pipeline, so that the generator set is convenient to install and maintain.
Example 5
As shown in fig. 5, this embodiment applies any one of the fluid power generation devices of embodiments 1 to 3, and provides a pressure reducing valve 14. The fluid power generation device 9 is arranged inside the valve body of the pressure reducing valve and is perpendicular to the fluid flow direction.
The generator set and the rotating wheel are arranged in the pipeline and further comprise a swinging mechanism which can support the fluid power generation device to vertically swing relative to the axial direction of the fixed shaft 11; the fixed shaft 11 is fixed to a support, and the fixed shaft 11 is arranged in a direction perpendicular to the fluid flow direction when the fluid power generation device 9 swings to the lowest position.
The swinging mechanism comprises a swinging rod 10 with one end sleeved on a fixed shaft 11 and the other end fixedly connected with the generator set, and a return spring 12 limiting the swinging position of the generator set, wherein the return spring 12 is connected to the fixed shaft 11.
The fluid in the pipeline is guided by a trapezoid guide plate 13 arranged in front of the pressure reducing valve 9 and flows through the fluid power generation device 9. When the flow rate of the fluid is too high, when the acting force of the fluid on the blades of the generator set is larger than the resilience force of the return spring 12, the fluid pushes the fluid generating device 9 to rotate along the fixed shaft 11 along with the swing rod 10, the rotating wheel forms an inclination angle with the vertical direction, part of the fluid flows through a gap between the rotating wheel and the pressure reducing valve 14, the fluid flowing through the rotating wheel is correspondingly reduced, and the thrust of the fluid flowing through the blades of the rotating wheel and the angle of the blades are changed to correspondingly reduce the stress of the blades, so that the rotating speed of the blades is further reduced. The current generated by the fluid power generation device 9 is not abrupt due to the increase of the fluid flow rate.
When the flow rate of the fluid becomes smaller, the acting force of the fluid on the blades of the rotating wheel is smaller than the resilience force of the return spring 12, and the fluid power generation device 9 returns to the vertical position from the inclination angle position by the rotation of the swing rod 10 along the fixed shaft 11 through the resilience force of the return spring 12. As the gap between the fluid power generation device 9 and the pressure reducing valve 14 is gradually reduced, the loss of fluid from the gap is reduced, accordingly, the fluid flowing through the runner blades is increased, the thrust of the fluid flowing through the runner blades and the angle of the blades are changed, so that the stress of the blades is correspondingly increased, and the rotating speed of the blades is further increased. The current generated by the fluid power generation device 9 is not abrupt due to the decrease in the fluid flow rate.
The current generated by the final fluid power generation device 9 is not suddenly changed due to the sudden change of the fluid flow rate, thereby achieving the effect of stabilizing the current.
The pressure reducing valve 9 also comprises a battery assembly which is arranged outside the valve body of the pressure reducing valve 9 and connected with the generator set, and provides electric energy for the valve body of the pressure reducing valve.
The battery assembly comprises a rectifying module, a filtering module, a voltage reducing module and a rechargeable battery which are sequentially connected.
The fluid in the pipeline flows through the pressure reducing valve 9, the flowing fluid drives the blades of the rotating wheel to rotate, and the blades drive the main shaft to rotate so that the rotor of the generator set connected with the main shaft rotates, and therefore the generator generates electricity. The three-phase current output by the generator is transmitted to the battery assembly, alternating current is converted into direct current through the rectifying module, interference is removed from the current through the filtering module, the power supply is purified, and then the voltage reduction treatment or the voltage increase treatment is carried out through the voltage reduction module or the voltage increase module selectively so as to realize the follow-up required working power supply. The processed three-phase current is input into a rechargeable battery to charge the rechargeable battery. The rechargeable battery provides power for the pressure reducing valve.
The pressure reducing valve provided by the embodiment can generate electricity by itself, and the electricity generation is stable.
The same or similar reference numerals correspond to the same or similar components; the positional relationship described in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent. It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A fluid power generation device with stable power generation, which comprises a generator set and a rotating wheel; the rotating wheel is connected with a rotor of the generator set through a rotating shaft; the rotating wheel is characterized by comprising a blade, an upper base and a lower base; the two ends of the blade are fixedly connected with the rotating shaft through an upper base and a lower base, and the two connecting positions of the upper base and the lower base and the same blade are not on the same vertical line; the blades are uniformly distributed around the rotating shaft; the fluid power generation device further comprises a swinging mechanism capable of supporting the fluid power generation device to vertically swing relative to the axis direction of the fixed shaft; the fixed shaft is fixed on a supporting seat, and the fixed shaft is arranged in a direction which is perpendicular to the fluid flowing direction when the fluid power generation device swings to the lowest position; the swinging mechanism comprises a swinging rod with one end sleeved on the fixed shaft and the other end fixedly connected with the generator set, and a return spring limiting the swinging position of the generator set, and the return spring is connected to the fixed shaft.
2. The power stable fluid power generation device of claim 1 wherein the blades are triangular in cross section; one vertex angle of the triangle extends towards the radial outer side of the rotating wheel, and the corresponding bottom edge is perpendicular to the diameter of the cross section of the rotating wheel.
3. The stable power generation fluid power generation device according to claim 1, wherein the cross section of the blade is triangle-like, three vertex angles of the triangle-like are rounded angles, and a bottom edge corresponding to the vertex angle extending outwards of the rotating wheel is concave inwards of the triangle; the other two sides are outwards convex towards the triangle.
4. The stable power generation fluid power generation device according to claim 2, wherein the upper base blade connection points are in one-to-one correspondence with the lower base blade connection points, and the two corresponding connection points are located on the same vertical line; one end of the same blade is connected with one connecting point of the upper base, and the other end is connected with the adjacent connecting point of the corresponding lower base connecting point.
5. A power generation stable fluid power generation device according to claim 3, wherein the upper base blade connection points are in one-to-one correspondence with the lower base blade connection points, and the two corresponding connection points are located on the same vertical line; one end of the same blade is connected with one connecting point of the upper base, and the other end is connected with the adjacent connecting point of the corresponding lower base connecting point.
6. The power generation stabilized fluid power generation apparatus of claim 5, wherein a small runner is provided inside the runner; the small rotating wheel is consistent with the rotating wheel in structure; the blades of the small rotating wheels are staggered with the rotating wheel blades.
7. The stable power generation fluid power generation device according to claim 4, wherein a movable piece is provided between the blade and the rotating shaft; the movable piece is connected between the blade and the rotating shaft through a transverse shaft transversely arranged between the blade and the rotating shaft, and a torsion spring is fixedly arranged on the transverse shaft and connected with the movable piece.
8. A pressure reducing valve to which the power generation-stable fluid power generation device according to any one of claims 6 to 7 is applied, comprising a pressure reducing valve body; the device is characterized by further comprising a battery assembly arranged outside the valve body of the pressure reducing valve, and the power generation assembly is connected with the battery assembly; the fluid power generation device is arranged in the valve body of the pressure reducing valve and provides electric energy for the valve body of the pressure reducing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038329.7A CN107701350B (en) | 2017-10-30 | 2017-10-30 | Fluid power generation device with stable power generation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038329.7A CN107701350B (en) | 2017-10-30 | 2017-10-30 | Fluid power generation device with stable power generation |
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| CN107701350A CN107701350A (en) | 2018-02-16 |
| CN107701350B true CN107701350B (en) | 2024-08-09 |
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| CN107701350A (en) | 2018-02-16 |
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