A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law

Abstract

The present invention discloses a continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law, which relates to the technical field of hydraulic power generation. The present invention includes: a fluid acceleration module for increasing the velocity of the working fluid; an energy storage module disposed at the output end of the fluid acceleration module for converting the kinetic energy and gravitational potential energy of the fluid into the kinetic energy required for power generation; and a fluid diffusion module located at the tail end of the energy storage module for diverting the working fluid and accelerating it to flow away from the tail. By using the provided fluid acceleration module, the working fluid is gathered and accelerated, which can greatly increase the generated kinetic energy, realize low-head water flow power generation, and is applicable to various types of small hydropower stations. Moreover, the water turbine assembly moves in a semi-circular continuous piston motion form, and can continuously use the working fluid to drive the water turbine impeller to rotate. Compared with the traditional water turbine that only does work once, the energy utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydropower generation, and particularly to a continuous rotary piston type hydraulic kinetic energy generation system based on Pascal's law. Background Art

[0002] Existing hydropower generation systems mainly utilize the potential energy of water, that is, the potential energy of water impacts a water turbine to drive an engine to generate electricity. It is proved by Pascal's "barrel splitting experiment" that the liquid pressure is related to the depth of the liquid, and has nothing to do with the mass of the liquid and the shape of the container. And the energy contained in the flowing water can be known from Bernoulli's equation: including kinetic energy, pressure energy, and potential energy, and the potential energy is a typical conservative force, and a large amount of non-conservative forces such as the kinetic energy of water are not utilized. Traditional hydropower stations need to build reservoirs for energy storage, with large engineering investment, long cycle, great impact on the environment, and low efficiency. For the vast low-head rivers, due to the small head difference, they cannot be effectively utilized, resulting in losses. Therefore, we propose a continuous rotary piston type hydraulic kinetic energy generation system based on Pascal's law. Summary of the Invention

[0003] The purpose of the present invention is to provide a continuous rotary piston type hydraulic kinetic energy generation system based on Pascal's law to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A continuous rotary piston type hydraulic kinetic energy generation system based on Pascal's law, comprising:

[0005] A fluid acceleration module for increasing the velocity of the working fluid;

[0006] An energy storage module, which is arranged at the output end of the fluid acceleration module and is used for converting the kinetic energy and gravitational potential energy of the fluid into the kinetic energy required for power generation;

[0007] A fluid diffusion module, which is located at the tail end of the energy storage module and is used for diverting the working fluid to accelerate its flow away from the tail;

[0008] A power generation module, which is connected to the output end of the energy storage module and is used for receiving the kinetic energy converted by the energy storage module and converting the kinetic energy into electrical energy.

[0009] Further, the fluid acceleration module includes a Venturi acceleration tube. One end of the Venturi acceleration tube is connected with a water inlet. A guide tube is installed at the tail of the Venturi acceleration tube. The other end of the guide tube is installed with a pump body. The water flow direction in the guide tube is the same as the water flow direction in the Venturi acceleration tube, and the water outlet of the guide tube located in the Venturi acceleration tube is set as a Laval nozzle.

[0010] Further, the water intake is arranged in a trumpet shape, and the Venturi acceleration tube is a conical tube structure with a gradually narrowing outlet.

[0011] Further, the energy storage module includes a support column fixed in the water. A water turbine assembly is installed on the support column. The water turbine assembly is provided with an outer ring, and a plurality of impellers are installed on the outer ring. Water buckets are formed between two impellers.

[0012] A plurality of spokes are installed on the inner side wall of the outer ring. The other ends of the spokes are installed with a central shaft, and the central shaft is arranged coaxially with the outer ring.

[0013] A water tank is installed on the outer edge of the outer ring. There is a certain gap between the water tank and the outer ring, and a sealing strip is arranged in the gap between the water tank and the outer ring.

[0014] Further, a water inlet pipe is fixedly connected to the top side wall of the outer ring. The top end of the water inlet pipe is connected to the water outlet of the Venturi acceleration tube through an elbow, and the water flow direction at the water inlet pipe is tangent to the circular edge of the water turbine impeller and vertically downward.

[0015] Further, the layout position of the water tank is between the five o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring, and the installation position of the water inlet pipe is between the nine o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring.

[0016] Further, the fluid diffusion module is arranged as a Venturi diffuser installed at the water outlet of the water tank.

[0017] Further, the power generation module includes a transmission mechanism connected to both ends of the central shaft. The output end of the transmission mechanism is connected to a speed change mechanism, and the output end of the speed change mechanism is connected to a generator.

[0018] The transmission mechanism is used to realize the transmission of kinetic energy between the water turbine and the input end of the generator.

[0019] The speed change mechanism is used to adapt the rotational speed of the transmission mechanism to the generator.

[0020] Further, the transmission mechanism is arranged as a coupling.

[0021] Further, the speed change mechanism is arranged as a speed changer.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. By using the provided fluid acceleration module, the working fluid is gathered and accelerated, which can greatly improve the generated kinetic energy, does not require a large head drop, realizes low-head water flow power generation, is suitable for various small hydropower stations, and is simple to implement, has a short construction period, and is convenient and practical.

[0024] 2. In the present invention, the water turbine assembly can continuously drive the water turbine impeller to rotate by using the working fluid in the form of a semi-circular continuous piston motion. Compared with the traditional water turbine that only does work once, the energy utilization rate is improved.

[0025] 3. Through the flared shape with gradually increasing outlet size of the Venturi diffuser tube in the present invention, according to the Venturi diffusion principle, the fluid at the tail of the water turbine assembly can flow out faster, preventing water flow from accumulating and flowing back.

[0026] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic connection diagram of the overall module of the present invention;

[0028] Figure 2 It is a schematic side view of the overall structure of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the power generation module of the present invention.

[0030] REFERENCE NUMERALS:

[0031] 1. Fluid acceleration module; 11. Water intake; 12. Venturi acceleration tube; 13. Guide pipe; 14. Pump body; 15. Laval nozzle;

[0032] 2. Energy storage module; 21. Support column; 22. Outer ring; 23. Bucket; 24. Spoke; 25. Central shaft; 26. Water tank; 27. Inlet pipe;

[0033] 3. Fluid diffusion module; 31. Venturi diffuser tube;

[0034] 4. Power generation module; 41. Transmission mechanism; 42. Speed change mechanism; 43. Generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0036] Please refer to Figures 1-3 , the present invention provides a technical solution: a continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law, including:

[0037] A fluid acceleration module 1 for increasing the speed of the working fluid;

[0038] The energy storage module 2 is arranged at the output end of the fluid acceleration module 1 and is used to convert the kinetic energy and gravitational potential energy of the fluid into the kinetic energy required for power generation.

[0039] The fluid diffusion module 3 is located at the tail end of the energy storage module 2 and is used to divert the working fluid so that it accelerates and flows away from the tail.

[0040] The power generation module 4 is connected to the output end of the energy storage module 2 and is used to receive the kinetic energy converted by the energy storage module 2 and convert the kinetic energy into electric energy.

[0041] For the technical solution of this embodiment, the fluid acceleration module 1 includes a Venturi acceleration tube 12. One end of the Venturi acceleration tube 12 is connected with a water inlet 11. The water inlet 11 is arranged in a horn shape. The Venturi acceleration tube 12 is a conical tube structure with a gradually narrowing outlet. A guide tube 13 is installed at the tail of the Venturi acceleration tube 12. The other end of the guide tube 13 is installed with a pump body 14. The water flow direction in the guide tube 13 is the same as the water flow direction in the Venturi acceleration tube 12, and the water outlet of the guide tube 13 located in the Venturi acceleration tube 12 is set as a Laval nozzle 15.

[0042] It should be noted that the Venturi acceleration tube 12 and the water inlet 11 are generally arranged below the water surface on the dam body. The horn-shaped water inlet 11 can increase the water inflow and pressure. The Venturi acceleration tube 12 is a conical tube structure with a gradually narrowing outlet, which contains two principles: the brachistochrone curve and Bernoulli's principle. This enables the fluid to pass through a smaller cross-sectional area, thereby increasing the speed. According to the continuity equation, the mass flow rate is constant in the pipeline, which means that in the narrowed part, the mass flow rate of the fluid must remain unchanged. Therefore, in order to keep the mass flow rate constant, when the cross-sectional area decreases, the speed of the fluid must increase.

[0043] According to Bernoulli's principle, there is an inverse relationship between speed and pressure. When the speed increases, the pressure decreases, which is the so-called Bernoulli effect. Therefore, when the working fluid passes through the narrowed part of the Venturi tube, the speed increases.

[0044] Specifically, the Venturi effect is expressed as:

[0045] P1 + 1 / 2 * ρ * v1^2 = P2 + 1 / 2 * ρ * v2^2

[0046] Where: P1 and P2 are the pressures at the inlet and the minimum cross-section; ρ is the density of the fluid;

[0047] v1 and v2 are the velocities at the inlet and the minimum cross-section. When the pressures are the same, the simplified formula is: A1*V1 = A2*V2, where A1 and A2 are the cross-sectional areas of the inlet and the outlet, and V1 and V2 are the velocities at the inlet and the outlet, which means the flow rate is conserved.

[0048] Therefore, under the action of the Venturi acceleration tube 12, without changing the mass flow rate of the working fluid, as the cross-sectional area decreases, the velocity of the working fluid at the outlet of the Venturi acceleration tube 12 increases. According to the kinetic energy formula of the working fluid, on the premise that the mass of the working fluid received at the inlet of the water inlet pipe 27 remains unchanged, the kinetic energy of the working fluid is proportional to the velocity, thus increasing the input kinetic energy of the working fluid to the energy storage module 2. Generally, the velocity can be increased by 2 - 4 times. In the kinetic energy formula, the velocity is in a square relationship, so when the velocity increases, the kinetic energy will increase exponentially.

[0049] Furthermore, by utilizing the pressure generated by the pump body 14, a large pressure and velocity are formed at the Laval nozzle 15. According to Pascal's law and Laval theory, the pressure and velocity at this point will increase and simultaneously form a greater pressure and velocity at the water outlet of the Venturi acceleration tube 12, which is the principle of a hydraulic press. Moreover, the pump body 14 uses the water flowing back below the downstream water level, which can also increase the water flow rate and effectively compensate for the flow rate difference of seasonal rivers.

[0050] Regarding the technical solution of this embodiment, the energy storage module 2 includes a support column 21 fixed in the water, and a water turbine assembly is installed on the support column 21. The support is a triangular stable structure;

[0051] The water turbine assembly is provided with an outer ring 22, and a plurality of impellers are installed on the outer ring 22. A water bucket 23 is formed between two impellers. A plurality of spokes 24 are installed on the inner side wall of the outer ring 22 for lightweight support. The other end of the spoke 24 is installed with a central shaft 25, and the central shaft 25 is coaxially arranged with the outer ring 22;

[0052] A water tank 26 is installed on the outer edge of the outer ring 22. There is a certain gap between the water tank 26 and the outer ring 22, and a sealing strip is arranged in the gap between the water tank 26 and the outer ring 22.

[0053] It should be noted that the water turbine assembly adopts the runner structure of the traditional waterwheel mode, seals the half side and the bottom of the waterwheel, and a cylinder cavity similar to a piston movement is formed between the two, maintaining the velocity and pressure of the water flow for a longer working distance. Its structure is simple, the operation is stable, it can run at high speed, and it has a larger force arm, greater torque, and greater torsion.

[0054] Furthermore, the number of unilateral spokes 24 of the outer ring 22 is multiple, and the multiple spokes 24 are arranged in a clockwise manner as a whole. Taking the counterclockwise movement direction as an example, the installation position of the water tank 26 is between the five o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring 22. The sealing strip between the water tank 26 and the outer ring 22 is made of wear-resistant rubber strip, with water as the lubricant, preferably without affecting the rotation of the water turbine. In the form of continuous piston movement, the pressure and speed of water are continuously maintained to do work on the water turbine.

[0055] Furthermore, a water inlet pipe 27 is fixedly connected to the top side wall of the outer ring 22. The installation position of the water inlet pipe 27 is between the nine o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring 22. The top end of the water inlet pipe 27 is connected to the water outlet of the Venturi acceleration pipe 12 through an elbow, and the water flow direction at the water inlet pipe 27 is tangent to the circular edge of the water turbine impeller and perpendicular downward, so as to maximize the lever arm of the lever principle. The movement trajectory of the water flow from top to bottom along the impeller is approximately the brachistochrone (cycloid, trochoid), and its speed increases and kinetic energy increases.

[0056] Furthermore, the volume of water per unit flow rate transported by the Venturi acceleration pipe 12 that each water bucket 23 can accommodate. The impeller is designed with the water inlet end of the water inlet pipe 27 as the water-facing surface to facilitate the collection of the kinetic energy of the water flow, and the water outlet end at the tail of the water turbine is in an easy-to-pour form to facilitate the rapid flow of the end water flow;

[0057] Specifically, the water buckets 23 evenly distributed on both sides of the outer ring 22 of the water turbine assembly perpendicular to the water turbine impeller are blades for bearing hydraulic impact and collecting the impact kinetic energy of water. The volume of the water bucket 23 is greater than or equal to the flow rate of the water flow per unit time. When descending, it is in a full-load mode, and when returning, it is in an inverted emptying mode.

[0058] For the technical solution of this embodiment, the fluid diffusion module 3 is set as a Venturi diffuser 31 installed at the water outlet of the water tank 26. Using the flared shape with gradually increasing outlet size in the Venturi diffuser 31, according to the Venturi diffusion principle, the fluid at the tail of the water turbine can flow out faster, preventing water flow accumulation and backflow.

[0059] For the technical solution of this embodiment, the power generation module 4 includes a transmission mechanism 41 connected to both ends of the central shaft 25. The output end of the transmission mechanism 41 is connected to a speed change mechanism 42, and the output end of the speed change mechanism 42 is connected to a generator 43;

[0060] The transmission mechanism 41 is used to realize the transfer of kinetic energy between the water turbine and the input end of the generator 43, and is specifically set as a coupling;

[0061] The speed-changing mechanism 42 is used to adapt the rotational speed of the transmission mechanism 41 to that of the generator 43. Specifically, it is set as a speed changer. When the central shaft 25 of the water turbine assembly rotates, the speed changer can be driven by the provided coupling, and the rotational speed of the speed changer is adapted to that of the generator 43, so that kinetic energy can be converted into electrical energy. It should be noted that the generator 43 is an existing product, and its structure and principle belong to the prior art, so they will not be elaborated here.

[0062] The working principle and process of the present invention are as follows: First, by using the provided water intake 11, the water flowing down from the dam can be made to flow into the Venturi acceleration tube 12. And in the middle and rear part of the Venturi acceleration tube 12, the external (downstream) water flow is introduced by the pump body 14. The outlet of the pump body 14 adopts the Laval nozzle 15 mode, which can also increase the pressure and flow rate of the fluid here. According to Pascal's law, the pressure here will be instantaneously conducted equally to all places, that is, the hydraulic press principle. So at the outlet of the Venturi acceleration tube 12, the pressure and speed of the water flow will be increased. According to the kinetic energy formula, the speed has a square relationship in the kinetic energy formula, that is to say, when the speed increases, the kinetic energy increases exponentially. Then the water flow accelerated in the Venturi acceleration tube 12 is introduced into the water turbine assembly. A semi-circular sealed continuous piston-type water tank 26 is arranged on the outer ring 22 of the water turbine. The stressed part is the water bucket 23 on the outer ring 22, and it continuously keeps the pressure and speed of the water doing work on the water turbine in the form of continuous piston motion, exponentially improving the energy utilization rate and increasing the power generation. Finally, through the rear-end Venturi diffuser tube 31, using the Venturi diffusion principle, the water flow poured out from the water bucket 23 is formed into a negative pressure effect for drainage, accelerating the flow from the tail. This not only speeds up the middle-section fluid but also prevents the tail water flow from silting up and flowing back. In this way, low-head water flow power generation can be realized, which is suitable for the upgrading and transformation of existing small low-head hydropower stations, providing a large amount of clean energy and making contributions to economic development and environmental protection.

[0063] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0064] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. When an element is referred to as being "assembled on", "mounted on", "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0066] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law, characterized in that, Comprising: A fluid acceleration module (1) for increasing the velocity of the working fluid; An energy storage module (2), which is arranged at the output end of the fluid acceleration module (1) and is used for converting the kinetic energy and gravitational potential energy of the fluid into the kinetic energy required for power generation; A fluid diffusion module (3), which is located at the tail end of the energy storage module (2) and is used for diverting the working fluid to accelerate its flow away from the tail; A power generation module (4), which is connected to the output end of the energy storage module (2) and is used for receiving the kinetic energy converted by the energy storage module (2) and converting the kinetic energy into electrical energy; The fluid acceleration module (1) includes a Venturi acceleration tube (12). One end of the Venturi acceleration tube (12) is connected with a water inlet (11). A diversion tube (13) is installed at the tail of the Venturi acceleration tube (12). The other end of the diversion tube (13) is installed with a pump body (14). The water flow direction in the diversion tube (13) is the same as the water flow direction in the Venturi acceleration tube (12), and the water outlet of the diversion tube (13) located inside the Venturi acceleration tube (12) is set as a Laval nozzle (15); The energy storage module (2) includes a support column (21) fixed in water. A water turbine assembly is installed on the support column (21). The water turbine assembly is provided with an outer ring (22). A plurality of impellers are installed on the outer ring (22). Water buckets (23) are formed between two impellers; A plurality of spokes (24) are installed on the inner side wall of the outer ring (22). The other ends of the spokes (24) are installed with a central shaft (25), and the central shaft (25) is arranged coaxially with the outer ring (22); A water tank (26) is installed on the outer edge of the outer ring (22). There is a certain gap between the water tank (26) and the outer ring (22), and a sealing strip is arranged in the gap between the water tank (26) and the outer ring (22); A water inlet pipe (27) is fixedly connected to the top side wall of the outer ring (22). The top end of the water inlet pipe (27) is connected to the water outlet of the Venturi acceleration tube (12) through an elbow, and the water flow direction at the water inlet pipe (27) is tangent to the circular edge of the water turbine impeller and perpendicular downward; 2. The continuous rotation piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 1, wherein: The water inlet (11) is set in a horn shape, and the Venturi acceleration tube (12) is a conical tube structure with a gradually shrinking outlet; 3. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 2, characterized in that: The layout position of the water tank (26) is between the five o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring (22), and the installation position of the water inlet pipe (27) is between the nine o'clock direction and the twelve o'clock direction in the counterclockwise direction of the outer ring (22); 4. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 3, characterized in that: The fluid diffusion module (3) is set as a Venturi diffusion tube (31) installed at the water outlet of the water tank (26); 5. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 4, characterized in that: The power generation module (4) includes a transmission mechanism (41) connected to both ends of the central shaft (25). The output end of the transmission mechanism (41) is connected with a speed change mechanism (42). The output end of the speed change mechanism (42) is connected with a generator (43); The transmission mechanism (41) is used for realizing the transmission of kinetic energy between the water turbine and the input end of the generator (43); The speed change mechanism (42) is used for adapting the rotational speed of the transmission mechanism (41) to the generator (43).

6. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 5, characterized in that: The transmission mechanism (41) is provided as a coupling.

7. A continuous rotary piston type hydraulic kinetic energy power generation system based on Pascal's law according to claim 6, characterized in that: The speed change mechanism (42) is provided as a speed changer.

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