Water impeller based on self-adaptive adjustment of water inlet flow and use method of water impeller

Abstract

The invention relates to the technical field of sewage treatment, in particular to a water impeller based on self-adaptive adjustment of water inlet flow and a use method thereof. The water impeller comprises a body and is provided with a variable frequency motor; the flow sensor is used for monitoring water inlet flow in real time and generating a flow signal; the energy storage mechanism is used for storing and releasing energy for driving the body to operate; the power switching mechanism is used for connecting and disconnecting the body and the energy storage mechanism; the controller is used for controlling start and stop of the body, receiving the flow signal and outputting a control instruction; the flow sensor, the body, the power switching mechanism and the energy storage mechanism are sequentially arranged in the water flow direction, the body is connected or disconnected with the energy storage mechanism through the power switching mechanism, and the body, the flow sensor and the switching mechanism are all in communication connection with the controller. According to the invention, a control closed loop taking the real-time water inlet flow as a signal can be established, so that the water impeller can automatically store energy in a low load and release energy to assist operation in a high load; and peak load shifting of energy is realized.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a flow booster based on adaptive adjustment of influent flow rate and its usage method. Background Technology

[0002] Submersible flow promoters, also known as flow boosters, are core equipment in the biological treatment units of wastewater treatment plants, such as aeration tanks, anaerobic tanks, and oxidation ditches. Their main function is to propel the mixed liquor flow, prevent sludge sedimentation, and promote sufficient contact between wastewater, oxygen, and microorganisms, which is crucial for ensuring the efficiency of biological reactions. With the increasing demands for energy conservation, intelligent operation, and equipment reliability in the wastewater treatment industry, the technological development of flow promoters has also shown a diversified trend. Existing flow promoters have the following drawbacks: unidirectional energy dissipation, lack of a "low-storage, high-output" buffer mechanism, and inability to mitigate grid impacts and reduce peak demand. That is, during periods of low influent flow, the power "saved" by the motor operating at reduced speed is not stored but wasted. Furthermore, during peak flow periods when greater propulsion is needed, the motor can only draw higher instantaneous power from the grid, failing to play a role in "peak shaving and valley filling" of the grid load. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing flow actuators that cause energy waste, and to provide a flow actuator based on adaptive adjustment of influent flow rate and its usage method. This invention can establish a control closed loop with real-time influent flow rate as the signal, enabling the flow actuator to automatically store energy at low load and release energy to assist operation at high load. This achieves energy "peak shaving and valley filling", reduces peak power consumption of the power grid system, improves process stability, and promotes the transformation of flow actuators from single execution devices to intelligent energy-saving units.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A flow actuator based on adaptive adjustment of influent flow rate is provided, including: The main body is equipped with a variable frequency motor to realize the variable frequency flow adjustment of the flow generator; A flow sensor is used to monitor the influent flow rate in real time and generate a flow signal. Energy storage mechanism for storing and releasing the energy that drives the body to operate; A power switching mechanism is used to connect and disconnect the main body and the energy storage mechanism; The controller is used to control the start and stop of the main body and to receive the flow signal and output control commands; The flow sensor, the main body, the power switching mechanism, and the energy storage mechanism are arranged sequentially along the water flow direction. The main body is connected to or disconnected from the energy storage mechanism through the power switching mechanism. The main body, the flow sensor, and the switching mechanism are all communicatively connected to the controller.

[0005] The main body of this invention is used to realize the basic functions of a flow promoter, specifically to achieve water circulation, mixing and stirring, and prevention of suspended solids sedimentation. The built-in variable frequency motor can adjust the motor speed as needed to improve energy efficiency. The flow sensor can be a Doppler ultrasonic flow meter or a time-difference ultrasonic flow meter. Within the knowledge of those skilled in the art, other devices that can be used to monitor sewage flow can also be selected to monitor the influent and generate a flow signal. The flow sensor is installed at the front end of the main body to monitor the sewage flow passing through it. The energy storage mechanism is used to convert the kinetic energy of the water flow into the mechanical energy of the main body when the sewage flow is high. The main body is connected to the energy storage mechanism, which directly stores the mechanical energy or converts it into other forms of energy for storage. When the sewage flow is low, the energy storage mechanism releases energy to the main body to drive its operation, thereby achieving efficient resource utilization. The power switching mechanism is used to connect the energy storage mechanism to the main body when the energy storage mechanism is storing or releasing energy, and disconnect the energy storage mechanism from the main body at other times. When the energy storage mechanism is disconnected from the main body, the variable frequency motor built into the main body drives the main body. The controller can use a PLC or a microcontroller to implement control functions. It controls the start or stop of the built-in variable frequency motor based on the flow monitoring signal of the flow sensor, controls the power switching mechanism to connect or disconnect the main body and the energy storage mechanism, and controls the energy storage or release of the energy storage mechanism.

[0006] This invention senses the influent flow rate and intelligently switches between "energy storage and energy consumption" states, transforming the flow generator from a device with constant energy consumption into an intelligent unit that can automatically optimize its own energy consumption according to operating conditions and participate in system load regulation. This solves the core problems of low energy efficiency and inability to adapt to load fluctuations in traditional equipment.

[0007] Furthermore, the power switching mechanism is an electromagnetic clutch, with its fixed end connected to the main body and its movable end connected to the energy storage mechanism. The electromagnetic clutch can be a dry single-plate electromagnetic clutch or a wet multi-plate electromagnetic clutch, utilizing electromagnetic force to engage and disengage the driving and driven parts of a mechanical device. In this invention, the electromagnetic clutch is used to connect or disconnect the main body from the energy storage mechanism. The core principle of the electromagnetic clutch is "electromagnetism," controlling the generation and disappearance of the magnetic field by switching the current on and off, thereby achieving the transmission or interruption of force.

[0008] Furthermore, the main body includes an impeller assembly and a drive assembly. The drive assembly is connected to the impeller assembly. A first transmission shaft is connected to the fixed end of the electromagnetic clutch. The first transmission shaft is sleeved inside the drive assembly and passes through the drive assembly. The first transmission shaft is connected to the impeller assembly away from the fixed end of the electromagnetic clutch. The impeller assembly can realize energy conversion. When the sewage flow rate is low, the drive assembly acts on the impeller assembly, and the impeller assembly converts its mechanical energy into fluid kinetic energy to agitate the sewage and prevent suspended solids from settling. When the sewage flow rate is high, the drive assembly no longer provides driving force. Instead, it uses the strong driving force of the water flow to convert the fluid kinetic energy into the mechanical energy of the impeller assembly, which is then transmitted sequentially through the first transmission shaft and the electromagnetic sensor to the energy storage mechanism for storage and later use.

[0009] Furthermore, the impeller assembly includes a wheel frame and an impeller. The drive assembly includes a first housing, the wheel frame is located at the front end of the first housing and fixedly connected to the first housing, the impeller is located within the wheel frame, the variable frequency motor is installed within the first housing, and the output shaft of the variable frequency motor is connected to the impeller. The first drive shaft passes through the variable frequency motor and its end is connected to the impeller. The impeller frame covers the impeller, providing protection for it. The first housing is used to install and fix the variable frequency motor, and the wheel frame is also connected to the first housing. Alternatively, the wheel frame and the first housing can be integrally formed. Water flows through the gap between the impeller and the wheel frame.

[0010] Furthermore, a second drive shaft is connected to the movable end of the electromagnetic clutch, and the second drive shaft is fixedly inserted into the energy storage mechanism. The second drive shaft is used to connect the energy storage mechanism and is connected to the first drive shaft through the electromagnetic clutch to transmit power.

[0011] Furthermore, the energy storage mechanism includes a second housing, within which a vacuum chamber is provided. A flywheel is housed within the vacuum chamber and is fixedly sleeved onto the outside of a second drive shaft. A first bearing is installed within the second housing, and the second drive shaft is mounted via the first bearing. The flywheel stores energy using high-speed rotational kinetic energy; when energy is needed, it restores and outputs the kinetic energy. The first bearing employs a combination of a permanent magnet bearing and an active electromagnetic bearing, suspending the flywheel rotor in the air via electromagnetic force, achieving contactless support and eliminating mechanical friction losses. The entire flywheel energy storage process is completed in a vacuum and magnetic levitation environment, enabling efficient, rapid, and chemical-reactive physical energy storage.

[0012] Furthermore, the energy storage mechanism also includes a bidirectional motor, which is located between the movable end of the electromagnetic clutch and the flywheel and connected to the flywheel. The bidirectional motor is also electrically connected to the variable frequency motor. During energy storage, the mechanical energy of the impeller is transferred to the flywheel, driving the flywheel to rotate and store energy. When energy needs to be released, the mechanical energy is transferred to the bidirectional motor through the flywheel and converted into electrical energy. This electrical energy, in conjunction with the external power grid system, powers the variable frequency motor, which then drives the impeller to rotate.

[0013] Furthermore, the fixed end of the electromagnetic clutch is installed inside the first housing, and sealing gaskets are installed at both ends of the first housing and both ends of the second housing for axial sealing. Integrating the fixed end and engagement part of the electromagnetic clutch into the first housing facilitates overall sealing; the sealing gaskets seal the first housing and the second housing respectively, maintaining the waterproofness of the interior of the first housing and the second housing, and protecting the internal components.

[0014] Furthermore, it also includes a chain, the ends of which are connected to the main body. The chain facilitates the retrieval and maintenance of the propeller.

[0015] This invention also provides a method for using a flow booster based on adaptive adjustment of inlet flow rate, specifically including the following steps: S1: Real-time monitoring of inlet water flow rate via flow sensor and generation of flow signal transmitted to controller; S2: After receiving the flow signal, the controller determines the flow rate. If the real-time flow rate is higher than the high flow rate threshold, the system enters the energy storage mode: the controller controls the power switching mechanism to connect the main body with the energy storage mechanism, and stores the excess mechanical energy of the main body in the energy storage mechanism. If the real-time flow rate is lower than the low flow rate threshold, the energy release mode is entered: the controller controls the power switching mechanism to connect the main body with the energy storage mechanism, and the energy storage mechanism provides driving force to the main body. If the real-time flow rate is greater than the low flow rate threshold but less than the high flow rate threshold, the speed regulation mode is entered: the controller controls the power switching mechanism to disconnect the main body from the energy storage mechanism, and adjusts the speed of the variable frequency motor to match its power to the current flow demand.

[0016] This invention automatically decides and switches between three operating modes by preset "low flow threshold" and "high flow threshold" and continuously comparing the real-time influent flow with these two thresholds. Through switching between these three modes, it creatively achieves the transfer and reuse of mechanical energy over time, realizing "peak shaving and valley filling." "Peak shaving" refers to releasing stored energy for driving or auxiliary driving during periods of high influent load or impact load, thereby directly reducing the peak power drawn by the variable frequency motor from the grid at that moment, achieving energy saving and smoothing grid impacts. "Valley filling" refers to storing surplus energy that would otherwise be wasted in an energy storage mechanism during periods of low influent load at the wastewater treatment plant.

[0017] Preferably, the high flow threshold is 320 m³ / h-380 m³ / h, and the low flow threshold is 120 m³ / h-180 m³ / h. The controller presets flow thresholds as range values, which improves the adaptability and versatility of the flow booster in different wastewater scenarios. Specifically, the system has a built-in parameter configuration module that allows users to flexibly adjust the thresholds according to actual operating conditions, such as the flow fluctuation characteristics of different process sections like oxidation ditches, aeration tanks, and A / O tanks, within a preset reasonable range. For example, the low flow threshold range is set to 120 m³ / h–180 m³ / h, and the high flow threshold range is set to 320 m³ / h–380 m³ / h. This range setting is based on typical industry flow fluctuation ranges and the flow booster's energy efficiency characteristic curve, ensuring adaptive control of "low storage and high output" in different scenarios. Simultaneously, the controller supports remote or local parameter writing, facilitating engineering debugging and subsequent operation and maintenance. Compared to simply setting the threshold as a point value, the present invention avoids the adaptation limitations caused by a "one-size-fits-all" point value setting, and significantly improves the engineering implementation value and technical competitiveness of the present invention in multiple application scenarios.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. Deep energy saving and economy: By adaptive "low storage and high power generation", the peak power of the variable frequency motor is directly reduced, achieving deeper energy saving than simple variable frequency speed regulation, reducing operating electricity costs and resulting in significant return on investment.

[0019] 2. Improved operational stability: Under high load impact, it can quickly release stored energy to provide additional thrust or directly use the released stored energy to provide impeller thrust, ensuring stable flow and mixing effect in the pool, guaranteeing effluent water quality, and enhancing the process's resistance to impact.

[0020] 3. Equipment and grid friendly: Smooths load fluctuations of variable frequency motors, extends the life of key components such as variable frequency motors and bearings, and reduces harmonic impacts on the power grid and demand costs.

[0021] 4. Wide range of applications: The solution is both innovative and practical. It can be used as the preferred equipment for new smart water projects. Its modular design is also particularly suitable for energy-saving retrofitting of a large number of traditional impellers in existing sewage treatment plants, helping the industry to upgrade to low-carbon and intelligent systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of a flow actuator based on adaptive adjustment of inlet flow rate according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a flow booster embodiment 1 based on adaptive adjustment of inlet flow rate according to the present invention; Figure 3 This is a schematic diagram of the internal structure of the variable frequency motor of the present invention; Figure 4 This is a schematic diagram of the internal structure of a flow booster embodiment 2 based on adaptive adjustment of inlet flow rate according to the present invention.

[0023] The markings in the diagram are explained below: 1. Main body; 11. Variable frequency motor; 111. Stator; 112. Rotor; 113. Winding; 114. Second bearing; 12. Impeller; 13. Wheel frame; 14. First housing; 2. Flow sensor; 3. Energy storage mechanism; 31. Second housing; 311. Vacuum chamber; 32. Flywheel; 33. First bearing; 34. Bidirectional motor; 4. Power switching mechanism; 41. First drive shaft; 42. Second drive shaft; 5. Controller; 6. Chain. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] Example 1 like Figures 1 to 3 The figure shows a first embodiment of a flow booster based on adaptive adjustment of inlet flow rate according to the present invention, which includes a body 1 and a variable frequency motor 11 for realizing variable frequency flow adjustment of the flow booster; Flow sensor 2 is used to monitor the influent flow rate in real time and generate a flow signal; Energy storage mechanism 3 is used to store and release the energy used by the main body 1. The power switching mechanism 4 is used to connect and disconnect the main body 1 and the energy storage mechanism 3; Controller 5 is used to control the start and stop of the main body 1, receive flow signals, and output control commands; The flow sensor 2, body 1, power switching mechanism 4, and energy storage mechanism 3 are arranged sequentially along the water flow direction. The body 1 is connected or disconnected from the energy storage mechanism 3 through the power switching mechanism 4. The body 1, flow sensor 2, and switching mechanism are all connected to the controller 5 in communication.

[0031] The main body 1 of this invention is used to realize the basic functions of a flow promoter, specifically to realize water circulation, mixing and stirring, and prevent suspended solids from settling. The built-in variable frequency motor 11 can adjust the motor speed according to needs to improve energy saving. The flow sensor 2 can be a Doppler ultrasonic flow meter or a time-difference ultrasonic flow meter. Within the knowledge of those skilled in the art, other devices that can be used to monitor sewage flow can also be selected to monitor the influent and generate a flow signal. The flow sensor 2 is installed at the front end of the main body 1 and can monitor the sewage flow through the main body 1. The energy storage mechanism 3 is used to convert the kinetic energy of the water flow into the mechanical energy of the main body 1 when the sewage flow is high. The main body 1 is connected to the energy storage mechanism 3, and the mechanical energy is directly stored or converted into other energy for storage. When the sewage flow is low, the energy is released to the main body 1 through the energy storage mechanism 3 to drive the main body 1 to operate, thereby realizing efficient utilization of resources. The power switching mechanism 4 connects the energy storage mechanism 3 to the main body 1 when the energy storage mechanism 3 is storing or releasing energy, and disconnects the energy storage mechanism 3 from the main body 1 at other times. When the energy storage mechanism 3 is disconnected from the main body 1, it is driven by the variable frequency motor 11 built into the main body 1. The controller 5 can be implemented using a PLC or a microcontroller to control the operation. It controls the start or stop of the variable frequency motor 11 built into the main body 1 based on the flow monitoring signal from the flow sensor 2, controls the power switching mechanism 4 to connect or disconnect the main body 1 from the energy storage mechanism 3, and controls the energy storage or release of the energy storage mechanism 3.

[0032] In one embodiment of the present invention, the power switching mechanism 4 is an electromagnetic clutch. The fixed end of the electromagnetic clutch is connected to the body 1, and the movable end of the electromagnetic clutch is connected to the energy storage mechanism 3. The electromagnetic clutch can be a dry single-plate electromagnetic clutch or a wet multi-plate electromagnetic clutch, using electromagnetic force to achieve the engagement and disengagement between the driving and driven parts of the mechanical device. In this invention, the electromagnetic clutch is used to connect or disconnect the body 1 from the energy storage mechanism 3. The core principle of the electromagnetic clutch is "electromagnetism," controlling the generation and disappearance of the magnetic field by switching the current on and off, thereby achieving the transmission or interruption of force.

[0033] In one embodiment of the present invention, the main body 1 includes an impeller assembly and a drive assembly. The drive assembly is connected to the impeller assembly. A first transmission shaft 41 is connected to the fixed end of the electromagnetic clutch. The first transmission shaft 41 is sleeved inside the drive assembly and passes through the drive assembly. The first transmission shaft 41 is connected to the impeller assembly away from the fixed end of the electromagnetic clutch. The impeller assembly can realize energy conversion. When the sewage flow rate is low, the drive assembly acts on the impeller assembly, and the impeller assembly converts its mechanical energy into fluid kinetic energy to agitate the sewage and prevent suspended solids from settling. When the sewage flow rate is high, the drive assembly no longer provides driving force. The strong driving force of the water flow is used to convert the fluid kinetic energy into the mechanical energy of the impeller assembly, which is then transmitted to the energy storage mechanism 3 for storage and later use through the first transmission shaft 41 and the electromagnetic sensor.

[0034] In one embodiment of the present invention, the impeller assembly includes a wheel frame 13 and an impeller 12. The drive assembly includes a first housing 14. The wheel frame 13 is located at the front end of the first housing 14 and is fixedly connected to the first housing 14. The impeller 12 is located inside the wheel frame 13. A variable frequency motor 11 is installed inside the first housing 14, and the output shaft of the variable frequency motor 11 is connected to the impeller 12. A first drive shaft 41 passes through the variable frequency motor 11 and its end is connected to the impeller 12. The impeller 12 is covered by a frame to protect the impeller 12. The first housing 14 is used to install and fix the variable frequency motor 11, and the wheel frame 13 is also connected to the first housing 14. Alternatively, the wheel frame 13 and the first housing 14 can be integrally formed. Water flows through the gap between the impeller 12 and the wheel frame 13.

[0035] See Figure 3 In the variable frequency motor 11, the rotor 112 is wrapped in the center by the stator 111, and the winding 113 is embedded in the inner wall groove of the stator 111. The first drive shaft 41 passes through the center of the rotor 112 and the two ends of the first drive shaft 41 are installed through the second bearing 114.

[0036] In one embodiment of the present invention, a second drive shaft 42 is connected to the movable end of the electromagnetic clutch, and the second drive shaft 42 is fixedly inserted into the energy storage mechanism 3. The second drive shaft 42 is used to connect the energy storage mechanism 3 and is connected to the first drive shaft 41 through the electromagnetic clutch to transmit power.

[0037] As one embodiment of the present invention, see Figure 2The energy storage mechanism 3 includes a second housing 31, within which a vacuum chamber 311 is provided. A flywheel 32 is housed within the vacuum chamber 311 and is fixedly sleeved onto the outside of a second drive shaft 42. A first bearing 33 is installed within the second housing 31, and the second drive shaft 42 is mounted via the first bearing 33. The flywheel 32 stores energy using high-speed rotational kinetic energy; when energy is needed, it restores and outputs the kinetic energy. The first bearing 33 employs a combination of permanent magnet bearings and active electromagnetic bearings, suspending the flywheel 32 rotor 112 in the air via electromagnetic force, achieving contactless support and eliminating mechanical friction losses. The entire energy storage process of the flywheel 32 is completed in a vacuum and magnetic levitation environment, enabling efficient, rapid, and chemical-reactive physical energy storage.

[0038] In one embodiment of the present invention, the fixed end of the electromagnetic clutch is installed inside the first housing 14, and sealing gaskets are installed at both ends of the first housing 14 and both ends of the second housing 31 for axial sealing. Integrating the fixed end and the engagement part of the electromagnetic clutch into the first housing 14 facilitates overall sealing; the sealing gaskets respectively seal the first housing 14 and the second housing 31, maintaining the waterproofness of the interior of the first housing 14 and the second housing 31, and protecting the internal components.

[0039] In one embodiment of the invention, a chain 6 is also included, with one end of the chain 6 connected to the body 1. The chain 6 facilitates the retrieval and maintenance of the propeller.

[0040] Example 2 like Figure 4 The following is a second embodiment of a flow generator based on adaptive adjustment of inlet flow rate according to the present invention. This embodiment is similar to embodiment 1, except that the energy storage mechanism 3 further includes a generator and a bidirectional motor 34. The bidirectional motor 34 is located between the movable end of the electromagnetic clutch and the flywheel 32 and is connected to the flywheel 32. The bidirectional motor 34 is also electrically connected to the variable frequency motor 11.

[0041] During energy storage, the mechanical energy of the impeller 12 is transferred to the flywheel 32, which drives the flywheel 32 to rotate and store energy. When energy needs to be released, the mechanical energy is transferred to the bidirectional motor 34 through the flywheel 32 and converted into electrical energy. This electrical energy works together with the external power grid system to supply power to the variable frequency motor 11, which then drives the impeller 12 to rotate.

[0042] Example 3 The following is an embodiment of a method for using a flow actuator based on adaptive adjustment of inlet flow rate according to the present invention, specifically including the following steps: S1: The inlet water flow is monitored in real time by the flow sensor 2 and a flow signal is generated and transmitted to the controller 5; S2: After receiving the flow signal, controller 5 determines the flow rate. If the real-time flow rate is higher than the high flow rate threshold, the energy storage mode is entered: the controller 5 controls the power switching mechanism 4 to connect the main body 1 with the energy storage mechanism 3, and stores the excess mechanical energy of the main body 1 in the energy storage mechanism 3. If the real-time flow rate is lower than the low flow rate threshold, the energy release mode is entered: the controller 5 controls the power switching mechanism 4 to connect the main body 1 with the energy storage mechanism 3, and the energy storage mechanism 3 provides driving force to the main body 1. If the real-time flow rate is greater than the low flow rate threshold but less than the high flow rate threshold, the speed regulation mode is entered: the controller 5 controls the power switching mechanism 4 to disconnect the main body 1 from the energy storage mechanism 3, and adjusts the speed of the variable frequency motor 11 to match its power to the current flow demand.

[0043] Specifically, the high flow rate threshold is 120 m³ / h-180 m³ / h, and the low flow rate threshold is 120 m³ / h-180 m³ / h.

[0044] Based on the influent flow adaptive adjustment impeller of Embodiment 2, the method of this embodiment was used to conduct experiments, and the data are as follows: 1.1 Experimental System Construction A 1:10 scale wastewater treatment flow propeller experimental system was constructed. The system consists of an influent simulation unit, the flow propeller of this invention, and a data acquisition system.

[0045] Water inlet simulation unit: Simulates the water inlet flow rate variation from 0 m³ / h to 500 m³ / h using a variable frequency water pump and regulating valve.

[0046] Comparative flow actuator: The motor has a rated power of 7.5kW.

[0047] The propulsion device of this invention uses a variable frequency motor 11 and a flywheel 32 that can store up to 1.2 MJ of mechanical energy.

[0048] Data acquisition system: The WT1800 power analyzer is used to record the input power on the grid side, and the PIV flow field velocimeter is used to record the flow velocity at the bottom of the pool.

[0049] 1.2 Experimental Condition Design Comparative example (traditional solution): The motor operates at a constant power of 7.5kW.

[0050] In this embodiment: when adaptive control is activated, when the influent flow rate is <150m³ / h, the excess power of the motor charges the flywheel 32 through the bidirectional motor 34; when the influent flow rate is >350m³ / h, the flywheel 32 releases energy to assist the variable frequency motor 11 in pushing the flow through the bidirectional motor 34.

[0051] 2. Experimental Results and Data Analysis 2.1 Key Performance Data: Energy Storage and Efficiency Single-unit tests were conducted on the core performance of "Energy Storage Mechanism 3". During the discharge process when the speed of flywheel 32 decreased from 6000 rpm (full energy) to 3000 rpm (half energy), the charge-discharge cycle efficiency of the power grid system was measured to be 86.5%, and the electric power generation cycle efficiency of bidirectional motor 34 reached 91.2%.

[0052] Conclusion 1: The flywheel 32 energy storage technology used in this scheme has high energy conversion efficiency (>86%) and fast response speed (millisecond level), which verifies the physical feasibility of "peak shaving and valley filling" in the thruster.

[0053] 2.2 Energy-saving effect verification: Energy consumption comparison The energy consumption of the two schemes was compared in a simulated 8-hour production cycle (including 2 hours of high flow and 4 hours of low flow).

[0054]

[0055] Conclusion 2: Experimental data show that, while ensuring the flow propulsion effect (flow velocity > 0.3 m / s), this scheme saves 22.2% more electricity than traditional constant power operation. This proves that the "low storage, high generation" strategy has significant energy-saving value in wastewater treatment.

[0056] 2.3 Flow field stability verification: flow velocity and sludge suspension By monitoring the flow velocity at the bottom of the tank using PIV (Particle Image Velocity Measurement), it was found that under high flow impact, the flow velocity of a traditional impeller would drop from 0.35 m / s to 0.28 m / s due to its limited power, resulting in an increase of 1.5 cm in the thickness of sludge deposits at the bottom of the tank. However, in this patented solution, during the high flow period, the flow velocity remained stable above 0.33 m / s due to the energy released by the flywheel 32, and no sludge deposits were observed at the bottom of the tank.

[0057] Conclusion 3: The "adaptive adjustment" of the present invention is not only energy-saving, but more importantly, it effectively maintains the stability of the flow field in the pool by "peak shaving" through the energy storage of flywheel 32 when the influent flow fluctuates, avoids the problem of sludge deposition caused by insufficient propulsion power, and ensures the quality of effluent.

[0058] 3. Summary This embodiment demonstrates, through specific experimental data and flow field simulation, that the "energy storage-type thruster based on adaptive adjustment of influent flow rate" has the following beneficial effects: High energy efficiency: Utilizing flywheel 32 energy storage achieves over 86% energy recycling, significantly reducing energy consumption.

[0059] Stable flow field: It solves the problem of flow velocity reduction caused by insufficient power during high flow impact, and improves the system's ability to resist impact loads.

[0060] Self-regulation: Through the "low storage, high output" mechanism, unstable inflow rate is transformed into stable propulsion power, thus achieving intelligent operation.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A flow actuator based on adaptive adjustment of influent flow rate, characterized in that, include The main body (1) is equipped with a variable frequency motor (11) for realizing the variable frequency flow adjustment of the flow generator; Flow sensor (2) is used to monitor the influent flow rate in real time and generate a flow signal; Energy storage mechanism (3) for storing and releasing energy that drives the operation of the main body (1); The power switching mechanism (4) is used to connect and disconnect the main body (1) and the energy storage mechanism (3); The controller (5) is used to control the start and stop of the main body (1) and to receive the flow signal and output control commands; The flow sensor (2), the body (1), the power switching mechanism (4), and the energy storage mechanism (3) are arranged sequentially along the water flow direction. The body (1) is connected or disconnected from the energy storage mechanism (3) through the power switching mechanism (4). The body (1), the flow sensor (2), and the switching mechanism are all communicatively connected to the controller (5).

2. The flow actuator based on adaptive adjustment of influent flow rate according to claim 1, characterized in that, The power switching mechanism (4) is an electromagnetic clutch. The fixed end of the electromagnetic clutch is connected to the main body (1), and the movable end of the electromagnetic clutch is connected to the energy storage mechanism (3).

3. The flow actuator based on adaptive adjustment of inlet flow rate according to claim 2, characterized in that, The main body (1) includes an impeller assembly and a drive assembly. The drive assembly is connected to the impeller assembly. The fixed end of the electromagnetic clutch is connected to a first transmission shaft (41). The first transmission shaft (41) is sleeved inside the drive assembly and passes through the drive assembly. The first transmission shaft (41) is connected to the impeller assembly away from the fixed end of the electromagnetic clutch.

4. The flow actuator based on adaptive adjustment of influent flow rate according to claim 3, characterized in that, The impeller assembly includes a wheel frame (13) and an impeller (12). The drive assembly includes a first housing (14). The wheel frame (13) is located at the front end of the first housing (14) and is fixedly connected to the first housing (14). The impeller (12) is located inside the wheel frame (13). The variable frequency motor (11) is installed inside the first housing (14), and the output shaft of the variable frequency motor (11) is connected to the impeller (12). The first drive shaft (41) passes through the variable frequency motor (11) and its end is connected to the impeller (12).

5. The flow actuator based on adaptive adjustment of influent flow rate according to claim 4, characterized in that, The movable end of the electromagnetic clutch is connected to a second drive shaft (42), and the second drive shaft (42) is fixedly inserted into the energy storage mechanism (3).

6. The flow actuator based on adaptive adjustment of influent flow rate according to claim 5, characterized in that, The energy storage mechanism (3) includes a second housing (31), a vacuum chamber (311) is provided inside the second housing (311), a flywheel (32) is provided inside the vacuum chamber (311), the flywheel (32) is fixedly sleeved outside the second drive shaft (42), a first bearing (33) is installed inside the second housing (31), and the second drive shaft (42) is installed through the first bearing (33).

7. The flow actuator based on adaptive adjustment of influent flow rate according to claim 6, characterized in that, The energy storage mechanism (3) also includes a bidirectional motor (34), which is located between the movable end of the electromagnetic clutch and the flywheel (32) and connected to the flywheel (32). The bidirectional motor (34) is also electrically connected to the variable frequency motor (11).

8. The flow actuator based on adaptive adjustment of influent flow rate according to claim 1, characterized in that, It also includes a chain (6), the end of which is connected to the body (1).

9. A method for using a flow actuator based on adaptive adjustment of influent flow rate, characterized in that, Specifically, the following steps are included: S1: The influent flow rate is monitored in real time by the flow sensor (2) and a flow signal is generated and transmitted to the controller (5); S2: After receiving the flow signal, the controller (5) determines the flow rate: If the real-time flow rate is higher than the high flow rate threshold, the energy storage mode is entered: the controller (5) controls the power switching mechanism (4) to connect the main body (1) with the energy storage mechanism (3) and store the excess mechanical energy of the main body (1) in the energy storage mechanism (3). If the real-time flow rate is lower than the low flow rate threshold, the energy release mode is entered: the controller (5) controls the power switching mechanism (4) to connect the main body (1) with the energy storage mechanism (3) and provide driving force to the main body (1) through the energy storage mechanism (3); If the real-time flow rate is greater than the low flow rate threshold and less than the high flow rate threshold, the speed regulation mode is entered: the controller (5) controls the power switching mechanism (4) to disconnect the main body (1) from the energy storage mechanism (3), and adjusts the speed of the variable frequency motor (11) to match its power to the current flow demand.

10. The method of using the flow generator based on adaptive adjustment of inlet flow rate according to claim 9, characterized in that, The high flow rate threshold is 320 m³ / h-380 m³ / h, and the low flow rate threshold is 120 m³ / h-180 m³ / h.

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