A dual digital valve redundant control system

Abstract

The utility model provides a kind of double digital valve redundancy control system, including one channel digital valve, two channel digital valve, the element of control one channel switch, the element of control two channel switch, one channel execution element, two channel execution element;One channel execution element and two channel execution element are rigidly synchronized by mechanical connection;The element of control one channel switch includes two switch elements, respectively for controlling the A, B loop on-off of one channel digital valve, and the element of control two channel switch is the same;One channel digital valve and two channel digital valve are redundant, and can work alone or work simultaneously.Through double valve redundancy design, two digital valves are backup, when any channel fails, another channel can independently undertake control task, ensure that execution mechanism continues to run, avoid wind generating set to be stopped or safety accident due to hydraulic control failure.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and in particular to a dual digital valve redundant control system. Background Technology

[0002] New clean energy sources have become a new development trend. Wind is one of the pollution-free energy sources, wind power generation is very environmentally friendly, and wind energy reserves are huge and inexhaustible, thus receiving increasing attention from countries around the world.

[0003] Digital hydraulics can be directly connected to a computer without the need for intermediate steps such as analog-to-digital conversion. Compared to traditional proportional and servo technologies, digital hydraulics has a simpler structure, lower requirements for hydraulic fluid precision and operating temperature, relatively lower cost, high repeatability, stability and reliability, and low drive power, making it very suitable for large wind turbine generator sets.

[0004] However, wind speed instability, seasonal climate change, and other unpredictable weather factors pose significant challenges to wind turbines. Hydraulic control components, actuators, and feedback devices operate under high and low temperature and vibration conditions for extended periods, making parts prone to aging and damage, leading to equipment failures. Therefore, to ensure the safe and long-term stable operation of the entire wind turbine, redundancy in the control system is necessary, requiring a dual-digital valve redundant control system. Utility Model Content

[0005] This invention provides a dual digital valve redundancy control system to address the deficiencies in the prior art.

[0006] This utility model provides a dual digital valve redundant control system, including: a one-channel digital valve, a two-channel digital valve, an element for controlling the one-channel switch, an element for controlling the two-channel switch, a one-channel actuator, and a two-channel actuator; the one-channel actuator and the two-channel actuator are rigidly synchronized through mechanical connection; the P port of both the one-channel digital valve and the two-channel digital valve are connected to the high-pressure oil source pipeline, and the T port of both are connected to the oil source return pipeline; the element for controlling the one-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the one-channel digital valve, respectively; the element for controlling the two-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the two-channel digital valve, respectively; the one-channel digital valve and the two-channel digital valve are redundant to each other and can work independently or simultaneously.

[0007] According to the dual digital valve redundant control system provided by this utility model, the T-circuit of both the one-channel digital valve and the two-channel digital valve is designed to be normally open for oil return, so as to ensure that the valve core is in an oil lubrication state.

[0008] According to the present invention, a dual digital valve redundant control system is provided, wherein the actuator is a hydraulic cylinder or a hydraulic motor.

[0009] According to the present invention, a dual digital valve redundant control system further includes a Master host, a Slave1 slave, and a Slave2 slave; the Master host controls a one-channel digital valve and a one-channel switch through the Slave1 slave, and controls a two-channel digital valve and a two-channel switch through the Slave2 slave.

[0010] According to the dual digital valve redundant control system provided by this utility model, when the one-channel digital valve and the two-channel digital valve work simultaneously, the system flow can be increased, driving the actuator to run rapidly.

[0011] According to the present invention, a dual digital valve redundancy control system can be expanded into a multi-digital valve redundancy control system.

[0012] According to the present invention, a dual digital valve redundant control system is provided, wherein the element controlling the first channel switch and the element controlling the second channel switch are solenoid valves or ball valves.

[0013] This invention provides a dual digital valve redundancy control system. Through a dual-valve redundancy design, the two digital valves serve as backups for each other. When either channel malfunctions (such as valve core jamming or oil circuit blockage), the other channel can independently take over the control task, ensuring continuous operation of the actuators and preventing wind turbine generator shutdowns or safety accidents due to hydraulic control failures. The T-loop constantly flowing oil return design ensures that the valve core of the backup digital valve is always in an oil-lubricated state, avoiding component aging or jamming caused by long-term idleness, further improving the reliability of the redundancy mechanism. In the collaborative working mode, when both digital valves work simultaneously, the system flow can be doubled, driving the actuator (such as the pitch hydraulic cylinder) to move rapidly, adapting to the emergency adjustment needs during sudden wind speed changes in wind power generation, and improving the dynamic response performance of the unit. The digital valves achieve precise control of the position and speed of the actuators through mechanical feedback. Compared with traditional hydraulic valves, they have higher repeatability and stronger stability, making them particularly suitable for high-precision control scenarios of pitch angle and yaw position in wind power generation. Digital hydraulic technology has low requirements for hydraulic fluid precision and temperature. Combined with redundant design, it enables the system to operate stably for extended periods in harsh environments such as high and low temperatures and vibrations in wind turbine generators, reducing maintenance costs. The dual digital valve redundancy architecture can be flexibly expanded to multiple digital valve systems to meet the high reliability and high flow hydraulic control requirements of large wind turbine generators or other industrial equipment, and has broad technological application value. Redundancy design reduces downtime and improves the power generation efficiency of wind turbine generators; at the same time, it reduces maintenance costs caused by hydraulic system failures, extends equipment lifespan, and achieves both economic and safety benefits. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the dual digital valve redundant control system provided in this embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the dual digital cylinder redundant control system provided in this embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of a dual digital motor redundant control system provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram illustrating the working principle of the dual digital valve redundant control system provided in this embodiment of the utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] This application provides a dual digital valve redundancy control system, including: a one-channel digital valve 1, a two-channel digital valve 6, an element 2 for controlling the one-channel switch, an element 5 for controlling the two-channel switch, a one-channel actuator 3, and a two-channel actuator 4; the one-channel actuator 3 and the two-channel actuator 4 are rigidly synchronized through mechanical connection; the P port of both the one-channel digital valve 1 and the two-channel digital valve 6 is connected to the high-pressure oil source pipeline, and the T port is connected to the oil source return pipeline; the element 2 for controlling the one-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the one-channel digital valve 1, respectively; the element 5 for controlling the two-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the two-channel digital valve 6, respectively; the one-channel digital valve 1 and the two-channel digital valve 6 are redundant with each other and can work independently or simultaneously.

[0024] To further optimize the above technical solution, the T-circuit of both the one-channel digital valve 1 and the two-channel digital valve 6 is designed to be normally open for oil return, so as to ensure that the valve core is in an oil-lubricated state.

[0025] To further optimize the above technical solution, the actuating element is a hydraulic cylinder or a hydraulic motor.

[0026] To further optimize the above technical solution, it also includes a Master host 8, a Slave 1 slave 9, and a Slave 2 slave 7; the Master host 8 controls a one-channel digital valve 1 and a one-channel switch element 2 through the Slave 1 slave 9, and controls a two-channel digital valve 6 and a two-channel switch element 5 through the Slave 2 slave 7.

[0027] To further optimize the above technical solution, when the one-channel digital valve 1 and the two-channel digital valve 6 work simultaneously, the system flow can be increased, driving the actuator to run quickly.

[0028] To further optimize the above technical solution, the system can be expanded into a multi-digital valve redundant control system.

[0029] To further optimize the above technical solution, the element 2 controlling the first-channel switch and the element 5 controlling the second-channel switch are solenoid valves or ball valves.

[0030] Working principle:

[0031] a. System composition and connection logic

[0032] The dual digital valve redundant control system consists of a single-channel digital valve 1, a two-channel digital valve 6, an element 2 controlling the single-channel switch, an element 5 controlling the two-channel switch, a single-channel actuator 3, and a two-channel actuator 4. Wherein:

[0033] The P port of the one-channel digital valve 1 and the two-channel digital valve 6 are connected to the high-pressure oil supply pipeline, and the T port is connected to the return oil pipeline. The T circuit is always open to return oil, ensuring that the valve core is always in an oil-lubricated state.

[0034] The element 2 that controls the one-channel switch includes two switching elements (such as a solenoid valve and a ball valve), which control the on / off state of the A and B circuits of the one-channel digital valve 1 respectively; similarly, the element 5 that controls the two-channel switch controls the on / off state of the A and B circuits of the two-channel digital valve 6.

[0035] The first-channel actuator 3 and the second-channel actuator 4 are rigidly synchronized through mechanical connection, and jointly drive the actuator (such as a hydraulic cylinder or hydraulic motor).

[0036] Master host 8 controls the digital valves and switching elements of the two channels through slave 1 (slave 9) and slave 2 (slave 7) respectively to achieve logical scheduling.

[0037] b. Core Working Mode

[0038] The system, controlled by Master host 8, achieves the following four operating states:

[0039] 1) Dual valve shut-off state

[0040] When element 2, which controls the first-channel switch, and element 5, which controls the second-channel switch, are both closed, the first-channel digital valve 1 and the second-channel digital valve 6 cut off the oil circuit.

[0041] The positions of the first-channel actuator 3 and the second-channel actuator 4 are locked, and the system is in standby or safety lock state.

[0042] 2) Independent operation of one channel

[0043] When element 2, which controls the first-channel switch, is turned on, the first-channel digital valve 1 is turned on; when element 5, which controls the second-channel switch, is turned off, the second-channel digital valve 6 is turned off.

[0044] The one-channel digital valve 1 precisely controls the position and speed of the actuator through mechanical feedback, while the two-channel digital valve 6 serves as a redundant backup, not participating in the operation but maintaining lubrication.

[0045] 3) Two-channel independent working state

[0046] When element 2, which controls the first-channel switch, is closed, the first-channel digital valve 1 is cut off; when element 5, which controls the second-channel switch, is opened, the second-channel digital valve 6 is turned on.

[0047] The two-channel digital valve 6 connects to control the actuator, while the one-channel digital valve 1 becomes a redundant backup, enabling fault switching or alternating operation.

[0048] 4) Dual-valve coordinated operation

[0049] When element 2, which controls the first-channel switch, and element 5, which controls the second-channel switch, are both turned on, the two-channel digital valves are simultaneously activated.

[0050] The single-channel digital valve 1 and the two-channel digital valve 6 simultaneously supply oil to the actuator, and the system flow is superimposed to drive the actuator to run quickly, which is suitable for scenarios that require high response speed.

[0051] c. Redundancy mechanisms and extension logic

[0052] Redundancy switching: When a digital valve in a certain channel fails, the system can switch to another channel to work independently by shutting down the switching element of the faulty channel, thus avoiding system shutdown due to single valve failure.

[0053] Extension principle: This dual digital valve redundancy design can be extended to a multi-digital valve redundancy system. By increasing the number of digital valves and corresponding control elements, the system's fault tolerance and flow regulation range can be further improved.

[0054] This invention provides a dual digital valve redundancy control system. Through a dual-valve redundancy design, the two digital valves serve as backups for each other. When either channel malfunctions (such as valve core jamming or oil circuit blockage), the other channel can independently take over the control task, ensuring continuous operation of the actuators and preventing wind turbine generator shutdowns or safety accidents due to hydraulic control failures. The T-loop constantly flowing oil return design ensures that the valve core of the backup digital valve is always in an oil-lubricated state, avoiding component aging or jamming caused by long-term idleness, further improving the reliability of the redundancy mechanism. In the collaborative working mode, when both digital valves work simultaneously, the system flow can be doubled, driving the actuator (such as the pitch hydraulic cylinder) to move rapidly, adapting to the emergency adjustment needs during sudden wind speed changes in wind power generation, and improving the dynamic response performance of the unit. The digital valves achieve precise control of the position and speed of the actuators through mechanical feedback. Compared with traditional hydraulic valves, they have higher repeatability and stronger stability, making them particularly suitable for high-precision control scenarios of pitch angle and yaw position in wind power generation. Digital hydraulic technology has low requirements for hydraulic fluid precision and temperature. Combined with redundant design, it enables the system to operate stably for extended periods in harsh environments such as high and low temperatures and vibrations in wind turbine generators, reducing maintenance costs. The dual digital valve redundancy architecture can be flexibly expanded to multiple digital valve systems to meet the high reliability and high flow hydraulic control requirements of large wind turbine generators or other industrial equipment, and has broad technological application value. Redundancy design reduces downtime and improves the power generation efficiency of wind turbine generators; at the same time, it reduces maintenance costs caused by hydraulic system failures, extends equipment lifespan, and achieves both economic and safety benefits.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual digital valve redundancy control system, characterized in that, include: The system comprises a one-channel digital valve (1), a two-channel digital valve (6), an element (2) for controlling the one-channel switch, an element (5) for controlling the two-channel switch, a one-channel actuator (3), and a two-channel actuator (4). The one-channel actuator (3) and the two-channel actuator (4) are mechanically connected to achieve rigid synchronization. The P port of both the one-channel digital valve (1) and the two-channel digital valve (6) is connected to the high-pressure oil source pipeline, and the T port is connected to the oil source return pipeline. The element (2) for controlling the one-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the one-channel digital valve (1) respectively. The element (5) for controlling the two-channel switch includes two switching elements, which are used to control the on / off state of the A and B circuits of the two-channel digital valve (6) respectively. The one-channel digital valve (1) and the two-channel digital valve (6) are redundant and can work independently or simultaneously.

2. The dual digital valve redundancy control system according to claim 1, characterized in that, Both the one-channel digital valve (1) and the two-channel digital valve (6) have a normally open oil return design in their T-circuit to ensure that the valve core is in an oil-lubricated state.

3. The dual digital valve redundancy control system according to claim 1, characterized in that, The actuator is a hydraulic cylinder or a hydraulic motor.

4. The dual digital valve redundancy control system according to claim 1, characterized in that, It also includes a Master host (8), a Slave1 slave (9) and a Slave2 slave (7); the Master host (8) controls a one-channel digital valve (1) and a one-channel switch element (2) through the Slave1 slave (9), and controls a two-channel digital valve (6) and a two-channel switch element (5) through the Slave2 slave (7).

5. A dual digital valve redundancy control system according to claim 1, characterized in that, When the one-channel digital valve (1) and the two-channel digital valve (6) work simultaneously, the system flow can be increased, driving the actuator to run quickly.

6. The dual digital valve redundancy control system according to claim 1, characterized in that, The system can be expanded into a multi-digital valve redundant control system.

7. A dual digital valve redundancy control system according to claim 1, characterized in that, The element (2) controlling the first-channel switch and the element (5) controlling the second-channel switch are solenoid valves or ball valves.

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