High-speed control valve powered by fluid kinetic energy and working method of high-speed control valve

Abstract

The invention relates to a high-speed control valve powered by fluid kinetic energy and a working method of the high-speed control valve, and belongs to the field of fluid transmission and control. The energy recovery unit can actively recover kinetic energy of fluid in the pipeline, the recovered electric energy is directly used for driving the piezoelectric element and the electromagnetic element, the quick response and clamping stagnation prevention functions of the control valve can be maintained for a long time, and therefore the system reliability is improved while efficient action is guaranteed. Composite driving of the piezoelectric element and the electromagnet is adopted, instantaneous driving force is generated through the quick response characteristic of the piezoelectric element, the static friction force of the valve element is overcome, pilot accurate control is achieved, valve element driving is completed through small electromagnetic force, and therefore the response speed is increased, and energy consumption is reduced. By means of the high-frequency micro-vibration structure, valve element unbalance loading caused by asymmetry of hydraulic pressure under the high-pressure condition and the clamping stagnation phenomenon caused in the hydraulic oil pollution state can be effectively weakened.

Description

TECHNICAL FIELD

[0001] The application relates to a high-speed control valve powered by fluid kinetic energy and a working method thereof, and belongs to the technical field of fluid transmission and control. BACKGROUND

[0002] The control valve is a core basic element of a modern fluid transmission and control system, and the performance of the control valve directly determines the control accuracy, response speed and energy consumption level of the entire system. With the development of industrial equipment towards high efficiency, intelligence and green, there is an urgent need for control valves with high response, low power consumption and high reliability.

[0003] The hydraulic transmission system is convenient for distributed installation, and the distance between various components is relatively far. If a cable power supply method is used to cover the discrete distribution of the control valve, the cost is high, and the wiring operation is complex. If a battery power supply method is used, the operation time of the control valve is limited by the capacity of the battery, and it is difficult to operate for a long time. Therefore, in the remote application far from the power supply, the self-power supply of the valve has important application value.

[0004] In the hydraulic transmission system, when high-pressure oil flows through the control valve, the throttling action of the valve port will cause pressure loss, and the energy of the high-pressure oil will be converted into heat energy and dissipated, causing energy waste and local heating. If the energy of the high-pressure oil during the flow process can be recovered and reused, not only can the control valve and other parts be powered, but also the energy efficiency of the entire hydraulic transmission system can be significantly improved. The invention patent with the application number 202410507721.5 discloses a power generation valve based on bionic impeller capturing fluid kinetic energy. The valve is internally provided with a curved blade impeller with bionic ribs. When the fluid flows through the valve, the impeller is driven to rotate, and the generator coaxially connected with the impeller generates electricity. The impeller improves the fluid flow mode, reduces turbulence and improves the power generation efficiency. The invention patent with the application number 202410507720.0 discloses a self-powered control valve with a low starting torque impeller. The valve is internally provided with a spiral impeller for collecting fluid kinetic energy flowing through the valve, driving the connecting shaft to rotate and driving the generator to generate electricity. The vertical axis spiral impeller structure can reduce the starting flow rate, reduce the torque fluctuation and offset the axial force, thereby improving the valve operation stability and power generation efficiency. The above-mentioned invention technology directly arranges the power generation impeller in the valve body flow channel, which often increases the flow resistance and interferes with the valve performance, has poor reliability, is difficult to maintain, and the energy recovery and valve control characteristics are mutually restricted, and it is difficult to realize high-efficiency and stable operation.

[0005] In the design process of control valve, how to balance fast response, low energy consumption and high reliability is still a big problem. In order to ensure the long-term reliability of the valve, prevent the leakage of the valve core or the decline of the control accuracy, the small gap between the valve core, the valve sleeve and the valve body needs to be maintained. However, the reduction of the gap will increase the friction, which will cause the valve core to be prone to jam and reduce the response speed; in order to overcome the jam and improve the response speed, the driving force needs to be increased, which will significantly increase the energy consumption. The invention patent with the application number 201910928116.4 discloses an integrated fast response valve electro-hydraulic drive device, which realizes the fast opening and closing of the valve by directly connecting the micro bidirectional gear pump with the motor and combining the shortest oil way and the zero-backlash actuator. However, the gear and rack transmission structure will gradually weaken the zero-backlash characteristic under the long-term high-frequency start-stop working condition, thereby affecting the long-term stability of the positioning accuracy and the response speed. The invention patent with the application number 202211174101.1 discloses a multi-dimensional discrete micro high-speed on-off valve and its working method, which eliminates the lateral jam through the ball valve core-spring floating base structure. However, in the high-frequency closing reset process, the oscillation rebound of the ball valve core will cause the instantaneous flow fluctuation, thereby making it difficult to guarantee the long-term sealing stability.

[0006] However, the existing control valve generally has the problems of limited remote power supply, insufficient response speed, valve core jam and poor long-term operation reliability, and the industrial development urgently needs a new type of control valve device with self-power supply, high response, anti-jam and long-term stable operation requirements. SUMMARY

[0007] In view of the above problems, the present application provides a high-speed control valve powered by fluid kinetic energy and its working method. The energy recovery and piezoelectric-electromagnetic composite driving unit work cooperatively. The energy recovery unit can actively recover the kinetic energy of the fluid in the pipeline and directly use the recovered electric energy to drive the piezoelectric element and the electromagnetic element, which can long-term maintain the fast response and anti-jam function of the control valve, thereby improving the system reliability while ensuring efficient action. The piezoelectric element and the electromagnet are driven in combination. The instantaneous driving force is generated by the fast response characteristic of the piezoelectric element, which overcomes the static friction of the valve core and realizes the accurate control of the pilot, and then the valve core is driven by a small electromagnetic force, thereby improving the response speed and reducing the energy consumption. Through the high-frequency micro-vibration structure, the valve core bias caused by the asymmetric hydraulic pressure under high pressure and the jam phenomenon caused by the pollution state of the hydraulic oil can be effectively weakened, which provides a core basic element for the upgrading of the hydraulic system to high efficiency, intelligence and green, and solves the key problems of remote power supply, low power consumption, high response and long-term stable operation.

[0008] The technical scheme of the present application is as follows: The application discloses a high-speed control valve powered by fluid kinetic energy, which comprises an energy recovery unit and a piezoelectric-electromagnetic composite driving unit, wherein the energy recovery unit and the piezoelectric-electromagnetic composite driving unit are connected, the energy recovery unit is used for actively recovering kinetic energy of fluid in a pipeline and converting the kinetic energy into electric energy to power the piezoelectric-electromagnetic composite driving unit, and the piezoelectric-electromagnetic composite driving unit is used for generating instantaneous driving force through piezoelectric elements and electromagnets to drive a valve core of the high-speed control valve.

[0009] Preferably, the high-speed control valve has two installation modes, in installation mode A, the energy recovery unit and a stop plate valve are fixedly installed, the stop plate valve and the piezoelectric-electromagnetic composite driving unit are fixedly installed on a valve block, and a channel is arranged in the valve block, and fluid flows in the channel.

[0010] Preferably, in installation mode B, the energy recovery unit and a stop pipe valve are fixedly installed, the piezoelectric-electromagnetic composite driving unit and a unit valve block are fixedly installed, and the stop pipe valve and the unit valve block are connected through a pipeline.

[0011] The device has two installation modes, in installation mode A, the energy recovery unit and the piezoelectric-electromagnetic driving unit are fixedly installed on the valve block, and is suitable for a working condition with a large installation space; in installation mode B, the energy recovery unit and the piezoelectric-electromagnetic driving unit are connected through a pipeline and are separately installed, and is suitable for a working condition with insufficient installation space.

[0012] Preferably, the energy recovery unit comprises a turbine outer shell, a connector and a generator, the turbine outer shell and the generator are fixedly installed through bolts and the connector, and the turbine outer shell is provided with a fluid inlet and a fluid outlet. The turbine outer shell is internally provided with a turbine mechanism, the turbine mechanism comprises a turbine, a guide vane and a guide vane base, the guide vane is fixedly installed on the connector through the guide vane base, the turbine is provided with turbine blades, the turbine is fixedly installed on a transmission shaft, the transmission shaft is installed on the connector, the transmission shaft is connected with the generator through a coupling, and the transmission shaft is rotatable; the fluid can drive the turbine to rotate, the turbine drives the generator to rotate through the transmission shaft and the coupling, thereby realizing power generation and achieving the effect of energy recovery; the recovered electric energy can directly drive the piezoelectric-electromagnetic composite driving unit, realizes closed-loop circulation of energy recovery and utilization, improves the overall energy efficiency of the system, and realizes remote energy self-supply. The guide vane is used for rectifying and guiding the entering fluid, so that the fluid flow direction is more focused and stable to act on the turbine blades, thereby improving the stress uniformity and rotation efficiency of the turbine. The control valve provided with the energy recovery unit with the guide vane effectively improves the recovery efficiency, the unit is separately arranged and is not limited by the structure of the valve body, and does not affect the performance of the valve.

[0013] Preferably, the guide vane is designed as an airfoil, the leading edge (the end facing the fluid flow) is a smooth arc, and the trailing edge (the end close to the turbine) is tapered, accurately guiding the fluid flow to the optimal impact angle with the turbine blade rotation plane, ensuring efficient transmission of fluid kinetic energy to the turbine, rather than generating vortex and impact loss. Through the guide vane structure, not only the energy recovery efficiency is improved, but also the local pressure pulsation and noise are reduced, the impact load on the transmission shaft is reduced, and the service life of the system is prolonged.

[0014] Preferably, the turbine blade is designed as a three-dimensional curved surface blade with spatial twist, the cross-sectional thickness of the blade root (close to the rotation axis) is larger and the curvature is higher to ensure the structural strength and the ability to grasp the fluid; the cross section of the blade gradually changes from the root to the blade tip (far from the rotation axis) to a thin and efficient airfoil to pursue efficiency and suppress vortex generation.

[0015] Preferably, the piezoelectric-electromagnetic composite driving unit comprises a valve body, a valve core, a coil, a fixed cover, an iron core, a piezoelectric element, a valve sleeve, a guide sleeve and a spring, the valve core is installed inside the valve body and can move in the installation direction, the valve body is provided with an internal fluid passage and a valve port; the piezoelectric element is fixedly installed on the valve core, and the iron core is fixedly installed on the piezoelectric element, that is, the iron core, the piezoelectric element and the valve core are sequentially fixedly connected; the coil is tightly installed on the valve body through the fixed cover, and the coil and the fixed cover are detachable, the coil is electrically connected with the generator of the energy recovery unit and is directly powered by the energy recovery unit; the valve sleeve is installed on the valve core and is detachable; the guide sleeve is installed on the iron core, and the iron core can move along the guide sleeve; the guide sleeve is installed on the valve body and is detachable; and the spring is arranged between the valve core and the guide sleeve to provide a spring force.

[0016] The piezoelectric element of the present application is located between the iron core and the valve core, which not only allows the piezoelectric element to output instantaneous driving force in advance to overcome static friction and realize accurate pilot control, but also allows the piezoelectric element to directly utilize the electric energy provided by the energy recovery unit for driving, thereby realizing integrated and efficient driving.

[0017] A working method of the above-mentioned high-speed control valve powered by fluid kinetic energy, the energy recovery unit and the piezoelectric-electromagnetic composite driving unit work in parallel, the energy recovery unit converts fluid kinetic energy into electric energy by capturing the energy originally consumed and converted into heat loss during the throttling process of the valve port, thereby providing long-term power supply for the piezoelectric-electromagnetic composite driving unit; at the same time, the turbine of the energy recovery unit undertakes the throttling function in the process of providing resistance, realizing the integrated function of energy recovery and throttling; the piezoelectric-electromagnetic composite driving unit works cooperatively with the electromagnetic driving unit through the integrated piezoelectric element inside.

[0018] Unlike existing technologies, this invention does not simply add a power generation device to the outside of the control valve. Instead, through an integrated design, it allows recovered energy to directly participate in the driving process, forming a closed-loop cycle of energy self-sufficiency and rapid response. Simultaneously, the energy recovery unit works in synergy with the piezoelectric-electromagnetic composite drive unit, integrating the valve's original throttling function into the energy recovery unit. This achieves energy recovery while simultaneously throttling, thus realizing functional integration and significantly improving operational performance. This invention is not limited to this specific type of valve but is also applicable to other types of hydraulic control valves and related hydraulic systems.

[0019] The specific implementation process is as follows: (1) In the initial state, the piezoelectric-electromagnetic composite drive unit is in the off state, and all the fluid flows through the energy recovery unit to recover energy and generate electrical energy to provide power supply for the piezoelectric-electromagnetic composite drive unit; (2) When the piezoelectric-electromagnetic composite drive unit is in the closed state, the valve core is in the closed or a certain static position under the action of spring force or hydraulic pressure. At this time, there is a large static friction between the valve core and the valve sleeve. When the piezoelectric-electromagnetic composite drive unit is in the open state, part of the fluid flows through the energy recovery unit to realize energy recovery throughout the process. The control unit applies a pulse voltage signal to the piezoelectric element. Based on the inverse piezoelectric effect, the piezoelectric element generates a small but rapid elongation instantaneously and outputs an instantaneous impact force that acts directly on the valve core to overcome the static friction and make the valve core generate a small initial displacement (pilot control). (3) When the piezoelectric element causes the valve core to produce a small initial displacement, it immediately switches to electromagnetic force (the pilot action time of the piezoelectric element is extremely short, on the order of milliseconds. Once the static friction is overcome, the valve core begins to move, or after a preset extremely short electrical pulse, the system immediately switches to electromagnetic drive). As the main drive control valve, the control unit energizes the coil, and the electromagnetic field attracts the iron core, generating a strong electromagnetic force. Since the iron core, piezoelectric element, and valve core are fixedly connected together, this electromagnetic force acts as the main force, driving the entire valve core assembly to overcome hydraulic pressure and other loads, and complete a large-scale rapid movement (opening or closing). (4) After the valve core is opened, the elongation of the piezoelectric element is precisely controlled by the voltage value signal of the AC pulse voltage applied to the piezoelectric element to finely adjust the final position of the valve core, so as to realize continuous and precise control of the valve opening and finally complete the high-precision closed-loop control of the system flow. (5) The control unit applies a high-frequency AC voltage signal (such as a sine wave) to the piezoelectric element, which drives the piezoelectric element to generate high-frequency mechanical vibration of the same frequency. This vibration is directly transmitted to the valve core. Through high-frequency micro-vibration, the friction state between the valve core and the valve sleeve changes from static friction caused by the valve core's unbalanced load, which is difficult to overcome, to dynamic friction, which is easy to overcome. This can effectively prevent the accumulation of contaminant particles that cause jamming, weaken the valve core's unbalanced load friction caused by the asymmetry of hydraulic pressure, and ensure the smooth movement of the valve core. After the piezoelectric-electromagnetic composite drive unit is activated, part of the fluid flows through the piezoelectric-electromagnetic composite drive unit and part of the fluid flows through the energy recovery unit to generate electrical energy, which provides power to the piezoelectric-electromagnetic composite drive unit. (6) When it is necessary to close or reset, the coil is de-energized and the electromagnetic force disappears; the valve core is reset under the action of spring force and / or reverse hydraulic pressure. During the reset process, the piezoelectric element is energized again to generate micro-vibration, ensuring smooth reset without jamming; the system is ready to execute the next instruction.

[0020] Preferably, when energy collection is not required, the energy recovery unit can be shut off via a stop plate valve or a stop pipe valve at the inlet.

[0021] For any details not covered in this invention, please refer to the prior art.

[0022] The beneficial effects of this invention are as follows: This invention proposes a high-speed control valve powered by fluid kinetic energy and its operating method, achieving long-term reliable operation in environments lacking stable power supply at remote locations, reducing dependence on external batteries or power sources. A composite drive system using piezoelectric elements and electromagnets is employed, utilizing the rapid response of piezoelectricity for precise pilot control, combined with the thrust of the electromagnet to complete the valve core movement. Through the functional coupling of the energy recovery unit and the piezoelectric-electromagnetic composite drive unit, a unified system of closed-loop energy utilization and rapid valve core response is achieved. Simultaneously, the original throttling function is integrated into the energy recovery unit, achieving integrated throttling and energy recovery, significantly improving overall performance. High-frequency micro-vibration technology can reduce valve core off-center loading caused by hydraulic pressure asymmetry and suppress contaminant particle deposition, thereby effectively preventing valve core jamming in high-pressure, hydraulic oil contamination environments and improving reliability. A rationally designed energy utilization and drive coordination mode ensures that the system maintains efficient and stable operation under various working conditions. This invention proposes an electro-hydraulic control device with self-powered energy, rapid response, and high reliability, which can significantly improve the energy efficiency and reliability of fluid control systems, provide key support for the high-efficiency, intelligent, and green upgrade of hydraulic systems, and effectively address core issues such as remote power supply, low power consumption, high response, and long-term stable operation. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0024] Figure 1 Installation method A of the high-speed control valve powered by fluid kinetic energy according to the present invention; Figure 2 Installation method B of the high-speed control valve powered by fluid kinetic energy according to the present invention; Figure 3 This is a schematic diagram of the energy recovery unit structure of the high-speed control valve powered by fluid kinetic energy according to the present invention. Figure 4 This is a schematic diagram of the turbine mechanism of the high-speed control valve powered by fluid kinetic energy according to the present invention. Figure 5 This is a schematic diagram of the turbine structure of the turbine mechanism; Figure 6 This is a schematic diagram of the piezoelectric-electromagnetic composite drive unit of the high-speed control valve powered by fluid kinetic energy according to the present invention. Figure 7 A schematic diagram of the working state of a high-speed control valve that utilizes fluid kinetic energy for power supply. Figure 8 A schematic diagram illustrating the working mode of a high-speed control valve powered by fluid kinetic energy; In the diagram, 1-energy recovery unit, 2-piezoelectric-electromagnetic composite drive unit, 3-valve block, 3'-unit valve block, 4-stop plate valve, 4'-stop pipe valve, 5-pipeline, 6-fluid inlet, 7-fluid outlet, 8-turbine housing, 9-connector, 10-generator, 11-turbine, 12-guide vane, 13-guide vane base, 14-drive shaft, 15-coupling, 16-fixed cover, 17-coil, 18-valve body, 19-valve core, 20-valve sleeve, 21-guide sleeve, 22-iron core, 23-valve port, 24-piezoelectric element, 25-spring. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. However, this is not the only description; all aspects not described in detail herein are based on conventional techniques in the art.

[0026] Example 1 A high-speed control valve powered by fluid kinetic energy, such as Figures 1-6As shown, it includes an energy recovery unit 1 and a piezoelectric-electromagnetic composite drive unit 2. The energy recovery unit 1 and the piezoelectric-electromagnetic composite drive unit 2 are connected. The energy recovery unit 1 is used to actively recover the kinetic energy of the fluid in the pipeline and convert it into electrical energy to provide power for the piezoelectric-electromagnetic composite drive unit 2. The piezoelectric-electromagnetic composite drive unit 2 is used to generate instantaneous driving force through the combined drive of piezoelectric elements and electromagnets to complete the valve core drive of the high-speed control valve.

[0027] Example 2 A high-speed control valve powered by fluid kinetic energy is described in Example 1, except that the high-speed control valve has two installation methods. In installation method A, the energy recovery unit 1 and the stop plate valve 4 are fixedly installed, and the stop plate valve 4 and the piezoelectric-electromagnetic composite drive unit 1 are fixedly installed on the valve block 3. The valve block 3 has a channel inside, and the fluid flows in the channel. This installation method can reduce the pipeline length and reduce friction loss.

[0028] Example 3 A high-speed control valve powered by fluid kinetic energy, as described in Embodiment 2, differs in that, in installation mode B, the energy recovery unit 1 is fixedly installed with the shut-off valve 4', the piezoelectric-electromagnetic composite drive unit 2 is fixedly installed with the unit valve block 3', and the shut-off valve 4' and the unit valve block 3' are connected by a pipe 5.

[0029] The device has two installation methods, installation method A is as follows: Figure 1 As shown, the energy recovery unit and piezoelectric-electromagnetic drive unit are uniformly installed on the valve block, which is suitable for working conditions with large installation space; installation method B is as follows. Figure 2 As shown, the energy recovery unit and the piezoelectric-electromagnetic drive unit are connected by pipes and can be installed separately, making them suitable for applications with limited installation space.

[0030] Example 4 A high-speed control valve powered by fluid kinetic energy, as described in Embodiment 3, except that the energy recovery unit 1 includes a turbine housing 8, a connector 9, and a generator 10. The turbine housing 8 and the generator 10 are fixedly installed to the connector 9 by bolts. The turbine housing 8 is provided with a fluid inlet 6 and a fluid outlet 7. The turbine housing 8 houses a turbine mechanism, which includes a turbine 11, a guide vane 12, and a guide vane base 13. The guide vane 12 is fixedly mounted to the connector 9 via the guide vane base 13. Turbine blades are mounted on the turbine 11, which is fixedly mounted to the drive shaft 14. The drive shaft 14 is mounted to the connector 9 and is connected to the generator 10 via a coupling 15. The drive shaft 14 is rotatable. Fluid can drive the turbine to rotate, and the turbine drives the generator to rotate via the drive shaft and coupling, thereby generating electricity and achieving energy recovery. The recovered electrical energy can directly drive the piezoelectric-electromagnetic composite actuator, realizing a closed-loop cycle of energy recovery and utilization, improving the overall energy efficiency of the system, and achieving remote energy self-supply. The guide vane 12 is used to rectify and guide the incoming fluid, making the fluid flow direction more focused and acting more smoothly on the turbine blades, thereby improving the uniformity of force on the turbine and its rotational efficiency. The control valve of this invention is equipped with an energy recovery unit with guide vanes, which effectively improves the recovery efficiency. This unit is arranged separately, is not limited by the valve body structure, and does not affect the valve performance.

[0031] Example 5 A high-speed control valve powered by fluid kinetic energy, as described in Embodiment 4, differs in that the guide vane 12 is designed as an airfoil. The leading edge (the end facing the incoming fluid flow) of the guide vane is a smooth arc, and the trailing edge (the end near the turbine) is tapered. This design precisely guides the fluid flow direction to form the optimal impact angle with the turbine blade rotation plane, ensuring that the fluid kinetic energy is efficiently transferred to the turbine, rather than generating eddies and impact losses. This guide vane structure not only improves energy recovery efficiency but also reduces local pressure pulsations and noise, lowers the impact load on the drive shaft, and extends the system's service life.

[0032] Example 6 A high-speed control valve powered by fluid kinetic energy, as described in Example 5, differs in that the turbine blade is designed as a three-dimensional curved blade with spatial twist. The blade root (near the axis of rotation) has a larger cross-sectional thickness and a higher curvature to ensure structural strength and the ability to capture fluid. The blade cross-section transitions from the root to the tip (away from the axis of rotation), gradually becoming a thin and efficient airfoil to pursue efficiency and suppress eddy current generation.

[0033] Example 7 A high-speed control valve powered by fluid kinetic energy, as described in Example 6, except that, as Figure 6As shown, the piezoelectric-electromagnetic composite drive unit 2 includes a valve body 18, a valve core 19, a coil 17, a fixing cover 16, an iron core 22, a piezoelectric element 24, a valve sleeve 20, a guide sleeve 21, and a spring 25. The valve core 19 is installed inside the valve body 18 and can move along the installation direction. The valve body 18 is provided with an internal fluid channel and a valve port 23. The piezoelectric element is fixedly installed on the valve core, and the iron core is fixedly installed on the piezoelectric element, that is, the iron core 22, the piezoelectric element 24, and the valve core 19 are fixedly connected in sequence. The coil 17 is fastened to the valve body 18 through the fixing cover 16, and the coil 17 and the fixing cover 16 are detachable. The coil 17 is electrically connected to the generator 10 of the energy recovery unit and is directly powered by the energy recovery unit 1. The valve sleeve 20 is installed on the valve core 19 and is detachable. The guide sleeve 21 is installed on the iron core 22, and the iron core 22 can move along the guide sleeve 21. The guide sleeve 21 is installed on the valve body and is detachable. The spring 25 is disposed between the valve core and the guide sleeve to provide spring force.

[0034] The piezoelectric element of the present invention is located between the iron core and the valve core. This arrangement allows the piezoelectric element to not only output instantaneous driving force in advance to overcome static friction and achieve pilot precise control, but also to directly utilize the electrical energy provided by the energy recovery unit to complete the drive, thereby achieving integrated and efficient drive.

[0035] Example 8 A method for operating a high-speed control valve powered by fluid kinetic energy is disclosed. An energy recovery unit 1 and a piezoelectric-electromagnetic composite drive unit 2 operate in parallel. The energy recovery unit 1 captures the energy originally consumed and converted into heat loss during valve throttling, converting fluid kinetic energy into electrical energy to continuously power the piezoelectric-electromagnetic composite drive unit 2. Simultaneously, the turbine of the energy recovery unit 1, while providing resistance, also performs a throttling function, achieving integrated energy recovery and throttling. The piezoelectric-electromagnetic composite drive unit 2 works collaboratively with the electromagnetic drive unit through its internally integrated piezoelectric element. Figure 7 The diagram shown illustrates the working state, where G represents the motor. p This indicates the pressure at the entrance.

[0036] Unlike existing technologies, this invention does not simply add a power generation device to the outside of the control valve. Instead, through an integrated design, it allows recovered energy to directly participate in the driving process, forming a closed-loop cycle of energy self-sufficiency and rapid response. Simultaneously, the energy recovery unit works in synergy with the piezoelectric-electromagnetic composite drive unit, integrating the valve's original throttling function into the energy recovery unit. This achieves energy recovery while simultaneously throttling, thus realizing functional integration and significantly improving operational performance. This invention is not limited to this specific type of valve but is also applicable to other types of hydraulic control valves and related hydraulic systems.

[0037] The specific implementation process is as follows: (1) In the initial state, the piezoelectric-electromagnetic composite drive unit 2 is in the closed state, and all the fluid flows through the energy recovery unit 1 to recover energy and generate electrical energy to provide power supply for the piezoelectric-electromagnetic composite drive unit 2; When energy collection is not required, the energy recovery unit 1 can be shut off through the stop plate valve 4 or the stop pipe valve 4' at the inlet.

[0038] (2) When the piezoelectric-electromagnetic composite drive unit 2 is in the closed state, the valve core 19 is in the closed or a certain static position under the action of spring force or hydraulic pressure. At this time, there is a large static friction between the valve core 19 and the valve sleeve 20. When the piezoelectric-electromagnetic composite drive unit 2 is in the open state, some fluid flows through the energy recovery unit 1 to realize energy recovery throughout the process. The control unit applies a pulse voltage signal to the piezoelectric element 24. Based on the inverse piezoelectric effect, the piezoelectric element 24 generates a small but rapid elongation instantaneously and outputs an instantaneous impact force directly acting on the valve core 19 to overcome the static friction and make the valve core generate a small initial displacement (pilot control). (3) When the piezoelectric element 24 causes the valve core to produce a small initial displacement, it immediately switches to electromagnetic force (the pilot action time of the piezoelectric element is extremely short, on the order of milliseconds. Once the static friction is overcome, the valve core begins to move, or after a preset extremely short electrical pulse, the system immediately switches to electromagnetic drive). As the main drive control valve, the control unit energizes the coil 17, and the electromagnetic field attracts the iron core, generating a strong electromagnetic force. Since the iron core 22, piezoelectric element 24, and valve core 20 are fixedly connected together, this electromagnetic force acts as the main force to drive the entire valve core assembly to overcome hydraulic pressure and other loads, and complete a large-scale rapid movement (opening or closing). (4) After the valve core 19 is opened, the extension of the piezoelectric element is precisely controlled by the voltage value signal of the AC pulse voltage applied to the piezoelectric element 24 to finely adjust the final position of the valve core, so as to realize continuous and precise control of the valve opening and finally complete the high-precision closed-loop control of the system flow. (5) The control unit applies a high-frequency AC voltage signal (such as a sine wave) to the piezoelectric element 24, which drives the piezoelectric element 24 to generate high-frequency mechanical vibration of the same frequency. This vibration is directly transmitted to the valve core 19. Through high-frequency micro-vibration, the friction state between the valve core and the valve sleeve changes from static friction caused by the valve core off-center load, which is difficult to overcome, to dynamic friction that is easy to overcome. This can effectively prevent the accumulation of contaminant particles that cause jamming, weaken the valve core off-center load friction caused by hydraulic pressure asymmetry, and provide a guarantee for the smooth movement of the valve core. After the piezoelectric-electromagnetic composite drive unit 2 is activated, part of the fluid flows through the piezoelectric-electromagnetic composite drive unit 2 and part of the fluid flows through the energy recovery unit 1, generating electrical energy to provide power supply for the piezoelectric-electromagnetic composite drive unit. (6) When it is necessary to close or reset, the coil 17 is de-energized and the electromagnetic force disappears; the valve core 19 is reset under the action of spring force and / or reverse hydraulic pressure. During the reset process, the piezoelectric element 24 is energized again to generate micro-vibration, ensuring smooth reset without jamming; the system is ready to execute the next instruction.

[0039] The piezoelectric-electromagnetic hybrid drive device of the present invention achieves precise control of the hydraulic circuit opening by working in conjunction with the internally integrated piezoelectric element and electromagnetic drive unit, thereby regulating the system flow and pressure. The piezoelectric element is placed between the iron core and the valve core, forming a hybrid drive mechanism.

[0040] like Figure 8 This is a high-speed control valve that utilizes fluid kinetic energy for power supply, and it has three operating modes: Mode 1: The system applies a high-frequency AC voltage signal to the piezoelectric element, causing the element to generate high-frequency mechanical oscillation. This oscillation is directly transmitted to the valve core, effectively eliminating the static friction between the valve core and the valve sleeve and valve body, and preventing jamming caused by valve core misalignment and hydraulic oil contamination.

[0041] Mode 2: Utilizing the piezoelectric-mechanical conversion characteristics, the piezoelectric element can output a large driving force before the electromagnetic force responds after receiving a pulse electrical signal, driving the valve core to overcome static friction and achieve rapid start-up, significantly shortening the overall response time.

[0042] Mode 3: By controlling the AC voltage signal applied to the piezoelectric element, its elongation can be precisely controlled, thereby fine-tuning the relative position of the valve core and achieving continuous and precise adjustment of the valve opening. Ultimately, this completes high-precision closed-loop control of the system flow. Depending on different loads and operating conditions, the control unit can flexibly select piezoelectric drive, electromagnetic drive, or a combination of drive modes to ensure that the valve core movement is both fast and stable.

[0043] After completing the control action, the valve core returns to its original position under the action of the return spring or reverse drive signal, and the system is ready to execute the next command, ensuring the efficient, stable, and precise operation of the hydraulic system. This valve has remote self-powering capability, eliminating the need for external cables or batteries, reducing wiring costs and maintenance difficulty, and extending operating time. At the same time, it effectively alleviates the response lag and jamming problems that traditional valves are prone to under high-frequency operation, and significantly improves long-term operational reliability. This device can be widely applied to various hydraulic equipment with high requirements for energy efficiency, response speed, and stability, especially in remote applications where the power source is far away.

[0044] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high speed control valve powered by fluid kinetic energy, characterized by, The energy recovery unit and the piezoelectric-electromagnetic composite driving unit are connected, the energy recovery unit is used for actively recovering kinetic energy of fluid in a pipeline and converting the kinetic energy into electric energy to provide power for the piezoelectric-electromagnetic composite driving unit, and the piezoelectric-electromagnetic composite driving unit is used for generating instantaneous driving force to complete driving of a valve core of a high-speed control valve through piezoelectric element and electromagnetic iron composite driving.

2. The high speed control valve powered by fluid kinetic energy according to claim 1, wherein, The high-speed control valve has two installation modes, in installation mode A, the energy recovery unit is fixedly installed with a stop valve, the stop valve and the piezoelectric-electromagnetic composite driving unit are fixedly installed on a valve block, the valve block is internally provided with a channel, and fluid flows in the channel.

3. The high speed control valve powered by fluid kinetic energy of claim 2, wherein, In installation mode B, the energy recovery unit is fixedly installed with a stop pipe valve, the piezoelectric-electromagnetic composite driving unit is fixedly installed with a unit valve block, and the stop pipe valve and the unit valve block are connected through a pipeline.

4. The high speed control valve powered by fluid kinetic energy of claim 1, wherein, The energy recovery unit includes a turbine outer shell, a connector and a generator, the turbine outer shell and the generator are fixedly installed with the connector through bolts, and the turbine outer shell is provided with a fluid inlet and a fluid outlet. The turbine outer shell is internally provided with a turbine mechanism, the turbine mechanism includes a turbine, a guide vane and a guide vane base, the guide vane is fixedly installed on the connector through the guide vane base, the turbine is provided with turbine blades, the turbine is fixedly installed on a transmission shaft, the transmission shaft is installed on the connector, the transmission shaft is connected with the generator through a coupling, and the transmission shaft is rotatable. The guide vane is used for straightening and guiding the entering fluid, so that the fluid flowing direction is more focused and stably acts on the turbine blades.

5. The high speed control valve powered by fluid kinetic energy according to claim 4, wherein, The guide vane is designed as an airfoil type, the front edge of the guide vane is a smooth circular arc, and the rear edge is a tapered shape.

6. The high speed control valve powered by fluid kinetic energy of claim 5, wherein, The turbine blade is designed as a three-dimensional curved surface blade with spatial distortion, the cross section of the blade root is thick and has high camber to ensure structural strength and fluid grabbing capacity; the blade cross section transitions from the root to the blade tip.

7. The high speed control valve powered by fluid kinetic energy according to claim 6, wherein, The piezoelectric-electromagnetic composite driving unit includes a valve body, a valve core, a coil, a fixed cover, an iron core, a piezoelectric element, a valve sleeve, a guide sleeve and a spring, the valve core is installed in the valve body and can move along the installation direction, the valve body is provided with an internal fluid channel and a valve port; the iron core, the piezoelectric element and the valve core are sequentially fixedly connected; the coil is tightly installed on the valve body through the fixed cover, and the coil and the fixed cover are detachable, the coil is electrically connected with the generator of the energy recovery unit and is directly powered through the energy recovery unit; the valve sleeve is installed on the valve core and is detachable; The guide sleeve is installed on the iron core, the iron core can move along the guide sleeve, the guide sleeve is installed on the valve body and is detachable; and the spring is arranged between the valve core and the guide sleeve to provide spring force.

8. A method of operating a high speed control valve powered by fluid kinetic energy as defined in claim 7, characterized in that, The energy recovery unit and the piezoelectric-electromagnetic composite driving unit work in parallel, the energy recovery unit converts fluid kinetic energy into electric energy by capturing energy originally consumed and converted into heat loss in the throttling process of the valve port to provide long-term power supply for the piezoelectric-electromagnetic composite driving unit; meanwhile, the turbine of the energy recovery unit undertakes the throttling function in the process of providing resistance to realize the integration of energy recovery and throttling; The piezoelectric-electromagnetic composite driving unit cooperates with the electromagnetic driving unit through the integrated piezoelectric element.

9. The method of operating a high speed control valve powered by fluid kinetic energy according to claim 8, wherein, The specific implementation process is as follows: (1) Initial state, piezoelectric-electromagnetic composite drive unit is in the closed state, all the fluid flows through the energy recovery unit for energy recovery, generating electricity, providing power supply for the piezoelectric-electromagnetic composite drive unit; (2) When the piezoelectric-electromagnetic composite drive unit is in the closed state, the valve core is in the closed or a static position under the action of spring force or hydraulic pressure, at this time, there is a static friction force between the valve core and the valve sleeve; When the piezoelectric-electromagnetic composite drive unit is in the open state, part of the fluid flows through the energy recovery unit, realizing full-process energy recovery, and the control unit applies a pulse voltage signal to the piezoelectric element, which generates a small but fast elongation based on the inverse piezoelectric effect, outputting a transient impact force directly acting on the valve core to overcome the static friction and make the valve core produce an initial displacement; (3) When the piezoelectric element makes the valve core produce an initial displacement, it is immediately switched to electromagnetic force as the main driving control valve, and the control unit supplies power to the coil to generate electromagnetic force. Since the iron core, piezoelectric element and valve core are fixedly connected together, the electromagnetic force serves as the main force to drive the entire valve core assembly to overcome the load and complete the rapid movement; (4) After the valve core is opened, the voltage value signal of the alternating pulse voltage applied to the piezoelectric element is used to accurately control the elongation of the piezoelectric element to fine-tune the final position of the valve core, realizing continuous and accurate control of the valve port opening; (5) The control unit applies a high-frequency alternating voltage signal to the piezoelectric element to drive it to produce high-frequency mechanical vibration, which is directly transmitted to the valve core to prevent the accumulation of contaminant particles that cause jamming and weaken the valve core bias friction force caused by asymmetric hydraulic pressure, providing protection for smooth movement of the valve core; After the piezoelectric-electromagnetic composite drive unit is actuated, part of the fluid flows through the piezoelectric-electromagnetic composite drive unit, and part of the fluid flows through the energy recovery unit to generate electricity, providing power supply for the piezoelectric-electromagnetic composite drive unit; (6) When it is necessary to close or reset, the coil is de-energized and the electromagnetic force disappears; the valve core is reset under the action of spring force and / or reverse hydraulic pressure, and during the reset process, the piezoelectric element is energized again to produce micro-vibration, ensuring smooth and jam-free reset; the system is ready to execute the next instruction.

10. The method of operating a high speed control valve powered by fluid kinetic energy according to claim 9, wherein, When there is no need to collect energy, the energy recovery unit is closed by the stop plate valve or stop tube valve at the inlet.

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