Flywheel energy storage and hydraulic transmission integrated novel energy-saving driving device

Abstract

The invention relates to the technical field of hydraulic instruments, in particular to a flywheel energy storage and hydraulic transmission integrated novel energy-saving driving device which comprises a double-head hydraulic motor, a hydraulic oil tank, a main hydraulic pump and an auxiliary hydraulic pump, a first clutch is arranged at the input end of the auxiliary hydraulic pump, and a second clutch is arranged at one end of an output shaft of the double-head hydraulic motor. Load equipment is arranged at the other end of the output shaft of the double-end hydraulic motor; the device further comprises an energy storage assembly. The energy storage assembly comprises a main shaft and supporting frames which are symmetrically arranged; the main shaft is rotatably matched with the top of one support frame, the top of the other support frame is fixedly connected with a fixed shaft, one end of the fixed shaft far away from the support frame is rotatably matched with one end of the main shaft, and the other end of the main shaft is provided with a third clutch; a flywheel assembly is arranged on the main shaft, and an adjusting assembly is arranged on the fixed shaft. The rotational inertia of the flywheel assembly can be automatically adjusted, so that the comprehensive energy efficiency and the dynamic performance of the flywheel-hydraulic driving device are improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic instrument technology, and specifically to a novel energy-saving drive device that integrates flywheel energy storage and hydraulic transmission. Background Technology

[0002] In industrial transmission, construction machinery, and vehicle drive systems, energy conservation and efficient energy management are core objectives of technological development. Flywheel energy storage systems, due to their high power density, long lifespan, and rapid response, are considered an excellent mechanical energy storage solution, commonly used for energy recovery, power buffering, and system peak shaving. Hydraulic transmission systems, with their high power density, stepless speed regulation, and ease of linear motion, are widely used in heavy-duty, high-inertia applications. Currently, the "flywheel-hydraulic" hybrid power system, combining flywheel energy storage with hydraulic transmission, has attracted attention. The basic principle of this type of system is: when braking or load potential energy decreases, hydraulic energy is converted into mechanical energy through a pump / motor, accelerating the flywheel's rotation and storing it as kinetic energy; when peak power or driving the load is needed, the flywheel releases its kinetic energy, driving the hydraulic system through the pump / motor. This combination theoretically can effectively recover braking energy and improve system efficiency.

[0003] In existing technologies, such as the Litronic hybrid excavator, a hydraulic system and a flywheel system are integrated. The energy from the hydraulic circuit or braking energy is converted into mechanical energy by a dual-head hydraulic motor, which drives a high-speed flywheel rotor for storage. This system recovers energy during working conditions such as boom descent and releases it when high power is required for compound movements, thereby reducing the peak load of the engine and fuel consumption.

[0004] However, in actual use of the aforementioned flywheel system, although the flywheel has a large moment of inertia, stores a lot of energy, and can provide a large peak torque, the large inertia means that the flywheel itself starts slowly and requires high power to start. Under frequent start-stop or low-load conditions, a large amount of energy is lost in overcoming the flywheel's own inertia, resulting in high energy loss. Therefore, it is necessary to propose a new energy-saving drive device that integrates flywheel energy storage and hydraulic transmission to solve the above problems. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission. When the load is under high-power, high-energy-consumption conditions, it automatically increases the flywheel's moment of inertia to enhance its energy storage capacity and peak power support capability; when the load is under low-power, low-energy-consumption, or frequent start-stop conditions, it automatically decreases the flywheel's moment of inertia to reduce its own inertial energy loss, achieving rapid response. This overcomes the shortcomings of traditional fixed-inertia flywheels, such as high energy loss and slow response under certain operating conditions, thereby improving the overall energy efficiency and dynamic performance of the flywheel-hydraulic drive device.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission includes a dual-head hydraulic motor, a hydraulic tank, a main hydraulic pump, and an auxiliary hydraulic pump; the dual-head hydraulic motor, the main hydraulic pump, the auxiliary hydraulic pump, and the hydraulic tank are interconnected through a pipeline system; the input end of the auxiliary hydraulic pump is provided with a first clutch; one end of the output shaft of the dual-head hydraulic motor is provided with a second clutch; the other end of the output shaft of the dual-head hydraulic motor is provided with a load device; it also includes an energy storage component for storing the power output by the dual-head hydraulic motor.

[0007] The energy storage assembly includes a main shaft and symmetrically arranged support frames. The main shaft is rotatably mounted on the top of one of the support frames, while a fixed shaft is fixedly connected to the top of the other support frame. The end of the fixed shaft away from the support frame is rotatably engaged with one end of the main shaft. A third clutch is provided on the main shaft, and a flywheel assembly for rotating energy storage and release is provided at the other end of the main shaft. An adjustment assembly for adjusting the rotational inertia of the flywheel assembly is provided on the fixed shaft. Power transmission and disconnection between the main shaft and the auxiliary hydraulic pump and the dual-head hydraulic motor are respectively achieved through the third clutch, the first clutch, and the second clutch. An adaptive inertia adjustment system is also included to adjust the rotational inertia of the flywheel assembly according to the current operating conditions of the dual-head hydraulic motor.

[0008] The technical principles of the above solution are as follows:

[0009] When the load equipment is operating at low power, the adaptive inertia regulation system controls the adjustment component to reduce the rotational inertia of the flywheel assembly. Simultaneously, it controls the engagement of the second and third clutches. The mechanical energy output by the dual-head hydraulic motor is transmitted to the main shaft of the energy storage component through the second clutch, driving the main shaft and flywheel assembly to rotate. The recovered energy is stored as flywheel kinetic energy, reducing wear and tear on the flywheel assembly under low power conditions and shortening its rotational response time, thus saving energy. When the flywheel assembly needs to release energy, the adaptive inertia regulation system controls the engagement of the third and first clutches, allowing the flywheel assembly to release energy. When the load equipment is operating at high power, the adaptive inertia regulation system controls the flywheel assembly to increase its rotational inertia, enabling it to store more energy. This further increases the output power of the dual-head hydraulic motor during energy release operations.

[0010] The above approach has the following beneficial effects:

[0011] 1. This solution utilizes a variable inertia flywheel assembly to adjust the flywheel's rotational inertia, thereby reducing the high starting energy consumption and slow response speed issues caused by the large inertia of traditional fixed inertia flywheels under frequent start-stop or low-load conditions. By reducing inertia, the acceleration resistance of the flywheel during low-power energy storage is significantly reduced, the energy recovery response time is shortened, and the system's efficiency under partial load is improved.

[0012] 2. This solution increases inertia to enhance energy storage capacity and peak power output capability when high power demand is required, enabling the flywheel-hydraulic hybrid system to adapt more widely to complex and variable working cycles and maximize the dynamic auxiliary performance of the flywheel assembly.

[0013] 3. The mechanical energy storage method of the flywheel assembly in this solution can achieve tens of thousands of charge-discharge cycles, with a service life far exceeding that of chemical energy storage devices. At the same time, there are no harmful gas emissions during system operation, and the hydraulic oil can be recycled through the filtration system, reducing the environmental protection investment and subsequent treatment costs of the equipment.

[0014] Furthermore, the flywheel assembly includes mass blocks circumferentially arranged on the main shaft, and all mass blocks have an arc-shaped structure.

[0015] Beneficial effects: The arc-shaped structure has good circumferential compatibility with the main shaft, allowing for a tight fit and reducing air resistance and vibration during high-speed rotation. Compared to a block structure, the arc-shaped mass block has a more uniform distribution of its center of mass, which can reduce the mechanical impact caused by uneven rotational inertial forces and improve the operational stability of the flywheel assembly.

[0016] Furthermore, the adjustment assembly includes a first link and a second link circumferentially hinged to the side wall of the main shaft; the ends of the first and second links away from the main shaft are both hinged to their adjacent mass blocks. A cylindrical slider is axially slidably fitted on the fixed shaft, and a rotating sleeve is sleeved and rotatably fitted on the cylindrical slider. A third link is circumferentially hinged to the side wall of the rotating sleeve, and the ends of the third link away from the rotating sleeve are all hinged to their adjacent mass blocks. One of the support frames is equipped with a drive assembly for driving the cylindrical slider to slide axially on the fixed shaft.

[0017] Beneficial effects: The rotational cooperation between the rotating sleeve and the cylindrical slider converts axial sliding into radial movement of the mass block. The structure is compact and has high transmission efficiency, which can quickly respond to the inertia adjustment requirements and adapt to the dynamic working conditions of the system.

[0018] Furthermore, the drive assembly includes a controller and a drive component fixedly connected to the top of one of the support frames. A threaded rod is coaxially fixedly connected to the output shaft of the drive component, and a nut seat is threadedly fitted onto the threaded rod. A connecting rod is fixedly connected between the nut seat and the cylindrical slider. The controller is used to control the rotation angle of the output shaft of the drive component, thereby changing the distance between the mass block and the spindle axis.

[0019] Beneficial effects: The threaded fit between the threaded rod and the nut seat, combined with the controller to control the rotation angle of the drive component, can achieve fine adjustment of the mass block distance, meeting the inertia requirements under different working conditions.

[0020] Furthermore, the adaptive inertia adjustment system includes a data acquisition module, a calculation module, and a control module.

[0021] The acquisition module includes a speed sensor mounted on the dual-head hydraulic motor and a pressure sensor mounted on the pipeline system. The acquisition module is used to acquire the speed of the output shaft of the dual-head hydraulic motor and the pressure of the pipeline system using the speed sensor and the pressure sensor to obtain speed data and pressure data.

[0022] The calculation module includes a CNN neural network model. The calculation module is used to receive rotational speed data and pressure data, input the rotational speed data and pressure data into the CNN neural network model for deep learning, and identify the current working condition of the dual-head hydraulic motor. The calculation module is also used to calculate the moment of inertia of the flywheel assembly under the current working condition using the CNN neural network model and generate control commands. The control commands include one of the control commands to increase the distance between the mass block and the main shaft and to decrease the distance between the mass block and the main shaft.

[0023] The control module is used to receive control commands and use the controller to control the output shaft of the drive component to rotate by a corresponding angle based on the control commands, thereby changing the distance between the mass block and the spindle center, and controlling the third clutch to transmit and disconnect power with the first clutch and the second clutch.

[0024] Beneficial effects: By acquiring both speed and pressure parameters, comprehensive operational condition assessment is achieved. The CNN neural network model can extract operational features from real-time data, accurately identify load status, and output optimal inertia commands, making regulation more intelligent.

[0025] Furthermore, in the calculation module, the specific method for inputting the speed and pressure data into the CNN neural network model for deep learning and identifying the current operating condition of the dual-head hydraulic motor includes the following steps:

[0026] S101, Model Training: Collect 500 sets of training data, including the speed and pressure data of the dual-head hydraulic motor; then, manually label each set of training data with a working condition type label, and integrate the training data with the working condition type label into a training set, which is then input into an untrained CNN neural network model for deep learning training to obtain a trained CNN neural network model.

[0027] S102, Feature Extraction: Input the real-time speed data and pressure data into the trained CNN neural network model; the trained CNN neural network model extracts the features of the speed data and pressure data over a period of time.

[0028] S103, Operating Condition Recognition: The trained CNN neural network model calculates the probability values ​​of the operating condition types corresponding to the features of the speed data and pressure data within a certain period of time through a softmax classifier, and selects the operating condition type with the highest probability value as the current operating condition of the dual-head hydraulic motor.

[0029] Beneficial effects: The process of feature extraction followed by operating condition identification simplifies data processing, can quickly capture sudden changes in speed and pressure, adapts to complex operating conditions with frequent start-stop cycles, and provides timely basis for inertia adjustment.

[0030] Furthermore, the operating conditions are classified into high-power operating conditions and low-power operating conditions.

[0031] Beneficial effects: The operating conditions are clearly divided into two categories, which meets the core requirement of the device to adjust the inertia on demand. The simplified classification makes CNN model training more focused, feature extraction more accurate, and reduces the computational load of the model.

[0032] Furthermore, in the calculation module, the specific method for calculating the inertia of the flywheel assembly under the current operating conditions and generating control commands using a CNN neural network model includes the following steps:

[0033] S201, High-Power Operation: When the dual-head hydraulic motor is currently in high-power operation, the CNN neural network model outputs a control command to increase the distance between the mass block and the spindle, thereby increasing the inertia; the calculation formula is as follows:

[0034] r= (1).

[0035] Where I is the moment of inertia, m is the mass of a single mass block, and r is the distance between the mass block and the spindle.

[0036] S202, Low power condition: When the dual-head hydraulic motor is currently in low power condition, the CNN neural network model outputs a control command to reduce the distance between the mass block and the spindle, thereby reducing the inertia.

[0037] Beneficial effects: The formula intuitively establishes parameter relationships, which facilitates the model to quickly calculate adjustment amounts. The command output directly points to the adjustment of the mass block position, simplifying the control logic.

[0038] Furthermore, the control module includes a protection unit; the protection unit is used to receive pressure data and compare it with a set pressure threshold. When the pressure data is greater than or equal to the pressure threshold, the protection unit generates a protection command and sends it to the control module.

[0039] Beneficial effects: The pressure threshold setting provides safety assurance for the system. When the pipeline pressure exceeds the limit, the mass block is quickly adjusted to the nearest position to minimize the flywheel inertia and reduce rotational kinetic energy, thereby reducing the mechanical load under high pressure conditions and preventing damage to pipelines, motors and other components due to overload, thus improving the safety and service life of the device.

[0040] Furthermore, the drive assembly includes an electric cylinder fixedly connected to the top of one of the support frames, the output shaft of the electric cylinder and the cylindrical slider being fixedly connected, and a controller for controlling the extension and retraction of the output shaft of the electric cylinder.

[0041] Beneficial effects: Electric cylinders offer fast response speeds and high output shaft extension / retraction accuracy, enabling more precise control of the cylindrical slider's displacement and thus achieving accurate adjustment of the mass block's position. Compared to threaded rod structures, electric cylinders have a simpler structure and are easier to maintain. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission according to the present invention.

[0043] Figure 2 This is an isometric view of the flywheel assembly in the novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission of the present invention.

[0044] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0045] Figure 4 This is a front sectional view of the flywheel assembly in the novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission of the present invention.

[0046] Figure 5 This is a side sectional view of the flywheel assembly in the novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission of the present invention.

[0047] Figure 6 This is a structural diagram of the adaptive inertia adjustment system in the novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission of the present invention.

[0048] Figure 7 This diagram illustrates the steps of a CNN neural network model in the adaptive inertia adjustment system of a novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission, as described in this invention, to identify the current operating condition of a dual-head hydraulic motor.

[0049] The reference numerals in the accompanying drawings of the instruction manual include: 1. Main shaft; 2. Support frame; 3. Fixed shaft; 4. Third clutch; 5. Mass block; 6. First connecting rod; 7. Second connecting rod; 8. Cylindrical slider; 9. Rotating sleeve; 10. Third connecting rod; 11. Stepper motor; 12. Threaded rod; 13. Nut seat; 14. Connecting rod. Detailed Implementation

[0050] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] The following detailed description illustrates the specific implementation method:

[0054] Example 1:

[0055] As attached Figure 1 As shown: A novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission includes a dual-head hydraulic motor, a hydraulic tank, a main hydraulic pump, and an auxiliary hydraulic pump; the dual-head hydraulic motor, the main hydraulic pump, the auxiliary hydraulic pump, and the hydraulic tank are interconnected through a pipeline system; the input end of the auxiliary hydraulic pump is equipped with a first clutch; one end of the output shaft of the dual-head hydraulic motor is equipped with a second clutch; the other end of the output shaft of the dual-head hydraulic motor is equipped with a load device; it also includes an energy storage component for storing the power output by the dual-head hydraulic motor.

[0056] like Figure 2 and Figure 3 As shown, the energy storage component includes a main shaft 1 and symmetrically arranged support frames 2. The main shaft 1 is rotatably fitted to the top of one of the support frames 2, and a fixed shaft 3 is fixedly connected to the top of the other support frame 2 by bolts. The end of the fixed shaft 3 away from the support frame 2 is rotatably fitted to one end of the main shaft 1, and a third clutch 4 is provided at the other end of the main shaft 1. A flywheel assembly for rotating energy storage and release is provided on the main shaft 1, and an adjustment assembly for adjusting the rotational inertia of the flywheel assembly is provided on the fixed shaft 3. The main shaft 1 transmits and disconnects power to the auxiliary hydraulic pump and the dual-head hydraulic motor through the third clutch 4, the first clutch, and the second clutch, respectively.

[0057] It also includes an adaptive inertia adjustment system for adjusting the rotational inertia of the flywheel assembly based on the current operating conditions of the dual-head hydraulic motor.

[0058] Combination Figure 1 and Figure 2 As shown, when the load equipment is in a low-power condition, the adaptive inertia adjustment system controls the adjustment component to adjust the flywheel assembly to reduce the rotational inertia. At the same time, it controls the second clutch and the third clutch 4 to engage. The mechanical energy output by the dual-head hydraulic motor is transmitted to the main shaft 1 of the energy storage component through the second clutch, driving the main shaft 1 and the flywheel assembly to rotate. The recovered energy is stored in the form of flywheel kinetic energy. This reduces the wear and tear on the flywheel assembly driven by the load equipment in a low-power condition and reduces the rotational response time of the flywheel assembly, thereby achieving the purpose of saving energy.

[0059] When the flywheel assembly needs to release energy, the adaptive inertia adjustment system controls the third clutch 4 to engage with the first clutch. The main shaft 1 of the flywheel assembly drives the auxiliary hydraulic pump to rotate. The auxiliary hydraulic pump assists in increasing the output power of the dual-head hydraulic motor to realize the energy release operation of the flywheel assembly. When the load equipment is in a high-power condition, the adaptive inertia adjustment system controls the flywheel assembly to increase its rotational inertia, so that the flywheel assembly can store more energy, thereby further increasing the output power of the dual-head hydraulic motor when the flywheel assembly releases energy.

[0060] like Figure 4 and Figure 5 As shown, specifically, the flywheel assembly includes mass blocks 5 circumferentially arranged on the main shaft 1. All mass blocks 5 are arc-shaped structures. In this embodiment, all mass blocks 5 are combined to form a complete cylindrical structure.

[0061] like Figure 3 and Figure 4 As shown, specifically, the adjustment assembly includes a first link 6 and a second link 7 circumferentially hinged to the side wall of the main shaft 1; the ends of the first link 6 and the second link 7 away from the main shaft 1 are both hinged to the adjacent mass block 5.

[0062] A cylindrical slider 8 is axially slidably fitted on the fixed shaft 3. In this embodiment, a limiting block is provided on the inner side wall of the cylindrical slider 8, and an axial limiting groove is provided on the fixed shaft 3. The limiting block and the limiting groove slide together so that the cylindrical slider 8 can only slide on the fixed shaft 3 and cannot rotate. A rotating sleeve 9 is sleeved and rotatably fitted on the cylindrical slider 8. A third connecting rod 10 is circumferentially hinged on the side wall of the rotating sleeve 9. The end of the third connecting rod 10 away from the rotating sleeve 9 is hinged to the adjacent mass block 5. A drive component for driving the cylindrical slider 8 to slide axially on the fixed shaft 3 is provided on one of the support frames 2.

[0063] Combination Figure 3 As shown, due to the rotational engagement of the rotating sleeve 9 and the cylindrical slider 8, the rotation of the main shaft 1 drives the first connecting rod 6 and the second connecting rod 7, which in turn drives the mass block 5 to rotate. The third connecting rod 10 can also drive the rotating sleeve 9 to rotate on the cylindrical slider 8, forming a flywheel. When it is necessary to adjust the rotational inertia of the flywheel assembly, when the drive assembly drives the cylindrical slider 8 to slide axially along the fixed shaft 3, the rotating sleeve 9 moves axially along the fixed shaft 3 together with the cylindrical slider 8, while maintaining rotation.

[0064] by Figure 4 For example, since the right ends of the first link 6 and the second link 7 are both hinged to their adjacent mass blocks 5, and the right end of the third link 10 is hinged to the rotating sleeve 9, and the left end is hinged to the adjacent mass blocks 5; when the cylindrical slider 8 moves to the left, it can drive the rotating sleeve 9 to drive the connected third link 10, and then drive all the mass blocks 5 to... Figure 5 The mass block 5 moves synchronously away from the axis of the main spindle 1, thereby increasing the radial distance r between the mass block 5 and the axis of the main spindle 1.

[0065] According to the inertia calculation formula I= Mr 2 (I is the moment of inertia of the flywheel assembly, m is the mass of all mass blocks 5, and r is the radial distance from mass block 5 to the axis of the main shaft 1). As r increases, the moment of inertia increases.

[0066] When the cylindrical slider 8 moves to the right, it can drive the rotating sleeve 9 to drive the third connecting rod 10 connected to it, and then drive all the mass blocks 5 to move synchronously towards the axis of the main shaft 1, thereby reducing the radial distance r between the mass blocks 5 and the axis of the main shaft 1. As r decreases, the moment of inertia decreases.

[0067] Then, according to the kinetic energy calculation formula E=1 / 2×I×ω 2(E is the kinetic energy stored in the flywheel assembly, I is the moment of inertia of the flywheel assembly, and ω is the rotational speed of the main shaft 1) It can be seen that: increasing the moment of inertia I can enable the flywheel assembly to store more energy, thereby enabling the adaptive inertia adjustment system to control the flywheel assembly to increase the moment of inertia when the load equipment is in a high-power condition, so that the flywheel assembly can store more energy, thereby further increasing the output power of the dual-head hydraulic motor when the flywheel assembly releases energy.

[0068] Reducing the moment of inertia I can increase the rotational speed ω of the main shaft 1, thus reducing the time it takes for the rotational speed ω of the main shaft 1 to reach its maximum speed. This reduces the wear and tear on the flywheel assembly driven by the load equipment under low-power conditions, while also reducing the rotational response time of the flywheel assembly, achieving a fast response. This overcomes the shortcomings of traditional fixed-momentum flywheels, such as high energy loss and slow response under certain operating conditions, and improves the overall energy efficiency and dynamic performance of the flywheel-hydraulic drive device.

[0069] like Figure 3 As shown, specifically, the drive assembly includes a controller and a drive component that is fixedly connected to the top of one of the support frames 2 by bolts. In this embodiment, the drive component is a stepper motor 11. A threaded rod 12 is coaxially fixedly connected to the output shaft of the stepper motor 11 by bolts. A nut seat 13 is threaded onto the threaded rod 12. A connecting rod 14 is integrally formed between the nut seat 13 and the cylindrical slider 8. The controller is used to control the rotation angle of the output shaft of the stepper motor 11, thereby changing the distance between the mass block 5 and the axis of the main shaft 1.

[0070] Combination Figure 3 As shown, when the controller controls the output shaft of the stepper motor 11 to rotate in the forward direction, it can drive the threaded rod 12 to rotate in the forward direction. At this time, the threaded rod 12 can cause the nut seat 13 to move to the left, and then drive the connecting rod 14 to drive the cylindrical slider 8 to slide to the left along the fixed shaft 3, thereby increasing the rotational inertia of the flywheel assembly. When the controller controls the output shaft of the stepper motor 11 to rotate in the reverse direction, it can reduce the rotational inertia of the flywheel assembly.

[0071] like Figure 6 As shown, the adaptive inertia adjustment system specifically includes a data acquisition module, a calculation module, and a control module.

[0072] The acquisition module includes a speed sensor mounted on the dual-head hydraulic motor and a pressure sensor mounted on the pipeline system. The acquisition module is used to acquire the speed of the output shaft of the dual-head hydraulic motor and the pressure of the pipeline system using the speed sensor and the pressure sensor to obtain speed data and pressure data.

[0073] The calculation module includes a CNN neural network model. The calculation module is used to receive speed data and pressure data and input the speed data and pressure data into the CNN neural network model for deep learning to identify the current working condition of the dual-head hydraulic motor.

[0074] The calculation module is also used to calculate the moment of inertia of the flywheel assembly under the current operating conditions using a CNN neural network model and generate control commands; wherein, the control commands include one of the control commands to increase the distance between the mass block 5 and the main shaft 1 and to decrease the distance between the mass block 5 and the main shaft 1.

[0075] like Figure 7 As shown, the specific method for inputting speed and pressure data into the CNN neural network model for deep learning and identifying the current operating condition of the dual-head hydraulic motor in the calculation module includes the following steps:

[0076] S101, Model Training: Collect 500 sets of training data, including the speed and pressure data of the dual-head hydraulic motor; then, manually label each set of training data with a working condition type label, and integrate the training data with the working condition type label into a training set, which is then input into an untrained CNN neural network model for deep learning training to obtain a trained CNN neural network model.

[0077] S102, Feature Extraction: Input the real-time speed data and pressure data into the trained CNN neural network model; the trained CNN neural network model extracts the features of the speed data and pressure data over a period of time.

[0078] S103, Operating Condition Recognition: The trained CNN neural network model uses a softmax classifier to calculate the probability values ​​of the operating condition types corresponding to the features of the speed and pressure data over a period of time, and selects the operating condition type with the highest probability value as the current operating condition of the dual-head hydraulic motor. Operating condition classification includes high-power operating conditions and low-power operating conditions.

[0079] In the calculation module, the specific method for calculating the inertia of the flywheel assembly under the current operating conditions and generating control commands using a CNN neural network model includes the following steps:

[0080] S201, High-Power Operation: When the dual-head hydraulic motor is currently in high-power operation, the CNN neural network model outputs a control command to increase the distance between mass block 5 and spindle 1, thereby increasing the inertia; the calculation formula is as follows:

[0081] r= (1).

[0082] Where I is the moment of inertia, m is the mass of a single mass block 5, and r is the distance between mass block 5 and spindle 1.

[0083] S202, Low power condition: When the dual-head hydraulic motor is currently in low power condition, the CNN neural network model outputs a control command to reduce the distance between mass block 5 and spindle 1, thereby reducing the inertia.

[0084] The control module is used to receive control commands and use the controller to control the output shaft of the stepper motor 11 to rotate by a corresponding angle based on the control commands, thereby changing the distance between the mass block 5 and the axis of the main shaft 1, and controlling the third clutch 4 to transmit and disconnect power with the first clutch and the second clutch.

[0085] The control module includes a protection unit; the protection unit is used to receive pressure data and compare it with a set pressure threshold. When the pressure data is greater than or equal to the pressure threshold, the protection unit generates a protection command and sends it to the control module; the control module is also used to receive the protection command and use the protection command to control the distance between the mass block 5 and the spindle 1 to be minimized.

[0086] The energy-saving drive device of this invention integrates an adaptive variable inertia flywheel system and an intelligent control strategy. By adjusting the rotation radius of the flywheel mass block 5 in real time, the rotational inertia of the flywheel is dynamically changed. Combined with a CNN neural network model, the device can identify the system operating conditions and actively optimize the inertia of the flywheel components: reducing the inertia to respond quickly and reduce losses when storing energy at low power; increasing the inertia to store and release more energy when demanding high power, providing peak power assistance. This effectively solves the problems of slow response and poor adaptability of traditional fixed inertia flywheels. Through the synergistic optimization of energy recovery and power peak regulation, the overall energy efficiency and dynamic performance of the hydraulic transmission system under complex load scenarios such as engineering machinery are improved, achieving a unity of energy saving and high-efficiency drive.

[0087] Example 2:

[0088] The difference from Embodiment 1 is that the drive assembly includes an electric cylinder fixedly connected to the top of one of the support frames 2 by bolts. The output shaft of the electric cylinder and the cylindrical slider 8 are fixedly connected by bolts, and the controller is used to control the extension and retraction of the output shaft of the electric cylinder. The electric cylinder has a fast response speed and high precision in output shaft extension and retraction, which can more accurately control the displacement of the cylindrical slider, thereby achieving precise adjustment of the mass block position. It is more suitable for scenarios that require precise adjustment of inertia, and users can choose according to actual conditions.

[0089] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission, comprising a dual-head hydraulic motor, a hydraulic tank, a main hydraulic pump, and an auxiliary hydraulic pump; the dual-head hydraulic motor, the main hydraulic pump, the auxiliary hydraulic pump, and the hydraulic tank are interconnected via a pipeline system; the input end of the auxiliary hydraulic pump is equipped with a first clutch; one end of the output shaft of the dual-head hydraulic motor is equipped with a second clutch; and the other end of the output shaft of the dual-head hydraulic motor is equipped with a load device, characterized in that... It also includes an energy storage component for storing the power output from the dual-head hydraulic motor; The energy storage component includes a main shaft (1) and symmetrically arranged support frames (2); the main shaft (1) is rotatably fitted to the top of one of the support frames (2), and a fixed shaft (3) is fixedly connected to the top of the other support frame (2). The fixed shaft (3) is rotatably fitted to one end of the main shaft (1) away from the support frame (2), and a third clutch (4) is provided at the other end of the main shaft (1). A flywheel assembly for rotating energy storage and release is provided on the main shaft (1), and an adjustment assembly for adjusting the rotational inertia of the flywheel assembly is provided on the fixed shaft (3). The main shaft (1) transmits power to and disconnects from the auxiliary hydraulic pump and the dual-head hydraulic motor through the third clutch (4), the first clutch, and the second clutch, respectively. It also includes an adaptive inertia adjustment system for adjusting the rotational inertia of the flywheel assembly based on the current operating conditions of the dual-head hydraulic motor.

2. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 1, characterized in that, The flywheel assembly includes mass blocks (5) arranged circumferentially on the main shaft (1), and all mass blocks (5) are arc-shaped structures.

3. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 2, characterized in that, The adjustment assembly includes a first link (6) and a second link (7) circumferentially hinged to the side wall of the main shaft (1); the ends of the first link (6) and the second link (7) away from the main shaft (1) are both hinged to the adjacent mass block (5). A cylindrical slider (8) is axially slidingly fitted on the fixed shaft (3). A rotating sleeve (9) is sleeved and rotatably fitted on the cylindrical slider (8). A third connecting rod (10) is circumferentially hinged to the side wall of the rotating sleeve (9). The end of the third connecting rod (10) away from the rotating sleeve (9) is hinged to the adjacent mass block (5). A drive assembly for driving the cylindrical slider (8) to slide axially on the fixed shaft (3) is provided on one of the support frames (2).

4. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 3, characterized in that, The drive assembly includes a controller and a drive unit fixedly connected to the top of one of the support frames (2). A threaded rod (12) is coaxially fixedly connected to the output shaft of the drive unit. A nut seat (13) is threaded onto the threaded rod (12). A connecting rod (14) is fixedly connected between the nut seat (13) and the cylindrical slider (8). The controller is used to control the rotation angle of the output shaft of the drive unit, thereby changing the distance between the mass block (5) and the axis of the main shaft (1).

5. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 4, characterized in that, The adaptive inertia control system includes a data acquisition module, a calculation module, and a control module. The data acquisition module includes a speed sensor mounted on the dual-head hydraulic motor and a pressure sensor mounted on the pipeline system. The data acquisition module is used to acquire the speed of the output shaft of the dual-head hydraulic motor and the pressure of the pipeline system using the speed sensor and the pressure sensor to obtain speed data and pressure data. The computation module includes the CNN neural network model; The calculation module is used to receive speed data and pressure data, and input the speed data and pressure data into the CNN neural network model for deep learning to identify the current working condition of the dual-head hydraulic motor; The calculation module is also used to calculate the moment of inertia of the flywheel assembly under the current working condition using a CNN neural network model and generate control commands; wherein, the control commands include one of the control commands to increase the distance between the mass block (5) and the main shaft (1) and to decrease the distance between the mass block (5) and the main shaft (1); The control module is used to receive control commands and use the controller to control the output shaft of the drive component to rotate by the corresponding angle based on the control commands, so as to change the distance between the mass block (5) and the axis of the main shaft (1), and control the third clutch (4) to transmit and disconnect power with the first clutch and the second clutch.

6. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 5, characterized in that, In the calculation module, the specific method for inputting speed and pressure data into a CNN neural network model for deep learning and identifying the current operating condition of the dual-head hydraulic motor includes the following steps: S101, Model Training: Collect 500 sets of training data, including the speed and pressure data of the dual-head hydraulic motor; then, manually label each set of training data with working condition type labels, and integrate the training data with working condition type labels into a training set, which is then input into the untrained CNN neural network model for deep learning training to obtain a trained CNN neural network model. S102, Feature Extraction: Input the real-time speed data and pressure data into the trained CNN neural network model; the trained CNN neural network model extracts the features of the speed data and pressure data over a period of time. S103, Operating Condition Recognition: The trained CNN neural network model calculates the probability values ​​of the operating condition types corresponding to the features of the speed data and pressure data within a certain period of time through a softmax classifier, and selects the operating condition type with the highest probability value as the current operating condition of the dual-head hydraulic motor.

7. The novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 6, characterized in that, Operating conditions are categorized into high-power operating conditions and low-power operating conditions.

8. The novel energy-saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 7, characterized in that, In the calculation module, the specific method for calculating the inertia of the flywheel assembly under the current operating conditions and generating control commands using a CNN neural network model includes the following steps: S201, High-power condition: When the dual-head hydraulic motor is in a high-power condition, the CNN neural network model outputs a control command to increase the distance between the mass block (5) and the main shaft (1), thereby increasing the inertia; its calculation formula is as follows: r= （1）； Where I is the inertia, m is the mass of a single mass block (5), and r is the distance between the mass block (5) and the main shaft (1); S202, Low power condition: When the dual-head hydraulic motor is currently in low power condition, the CNN neural network model outputs a control command to reduce the distance between the mass block (5) and the main shaft (1), thereby reducing the inertia.

9. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 8, characterized in that, The control module includes a protection unit; the protection unit is used to receive pressure data and compare it with a set pressure threshold. When the pressure data is greater than or equal to the pressure threshold, the protection unit generates a protection command and sends it to the control module.

10. The new energy saving drive device integrating flywheel energy storage and hydraulic transmission according to claim 3, characterized in that, The drive assembly includes an electric cylinder fixedly connected to the top of one of the support frames (2), an electric cylinder output shaft and a cylindrical slider (8) fixedly connected, and a controller for controlling the extension and retraction of the electric cylinder output shaft.

Images