Hydraulic station high-speed shaft brake circuit pressure series pressure system treatment method

Abstract

The invention provides a hydraulic station high-speed shaft brake circuit pressure series pressure system treatment method, and relates to the technical field of wind turbine generators, and the method comprises the following steps: carrying out pressure relief on a hydraulic system and a yaw system; a connector of a main oil return opening T1 is replaced; state resetting is conducted on valves of the hydraulic system and the yaw system; recovering the power supply of the hydraulic station, detecting whether the joints of the non-standard pumping port joint, the main oil return port T1 and the steel pipe assembly leak or not, and monitoring the residual pressure of the high-speed shaft brake in the non-braking state; pressure prediction modules are installed in the hydraulic system and the yaw system. Through the steps of pressure relief, connector replacement, valve resetting and pressure boosting detection, the pressure series pressure problem of a high-speed shaft brake circuit of the hydraulic station is effectively solved, the non-standard extraction opening connector with the ED sealing ring is matched with the precise tightening torque so that the sealing performance of the connecting position can be improved, the leakage risk can be reduced, the pressure prediction module can find out pressure abnormity in advance and trigger an alarm, and the reliability of the system is improved. And the problems of brake failure, system faults and the like caused by pressure mixing are avoided.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically relating to a method for managing pressure cross-pressure in the high-speed shaft brake circuit of a hydraulic station. Background Technology

[0002] In the field of wind power generation, the hydraulic stations used in wind turbine generators pose certain safety hazards. Based on on-site feedback and analysis of unit operation data, it was found that the high-speed shaft brake of the hydraulic station has a residual pressure of 0-3.5 bar when it is not braking. Especially during the yaw process of the unit, this residual pressure may drive the brake to move and rub against the brake disc, thereby affecting the normal operation of the unit and even causing equipment damage, posing a significant safety risk. However, the existing technology lacks a method to eliminate the residual pressure of the high-speed shaft brake when it is not braking. Summary of the Invention

[0003] This invention provides a method for managing pressure cross-pressure in the high-speed shaft brake circuit of a hydraulic station, in order to solve at least one of the technical problems mentioned above.

[0004] To address the aforementioned technical problems, this invention discloses a method for managing pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station, comprising the following steps: S1. Depressurize the hydraulic and yaw systems; S2. Replace the connector at the main return port T1. At the main return port T1 position of the hydraulic station main valve block, remove the original sleeve connector and install a non-standard pull-out connector with ED sealing ring to the main return port T1. Connect the steel pipe assembly to the other end of the non-standard pull-out connector and mark it with an anti-loosening mark. S3. Reset the status of valves in the hydraulic system and yaw system; S4. Restore the power supply to the hydraulic station, increase the pressure to the preset value, and check whether there is leakage at the connection between the non-standard pull-out joint and the main return oil port T1 and the steel pipe assembly, and monitor the residual pressure of the high-speed shaft brake in the non-braking state. S5. Install a pressure prediction module in the hydraulic system and yaw system. The pressure prediction module is used to predict the pressure of the hydraulic system and yaw system and provide a pressure relief alarm based on the prediction results.

[0005] Preferably, step S1 includes turning off the power to the hydraulic station motor, manually operating the pressure relief valve and the solenoid valve in the yaw circuit located in the main valve block to release the pressure of the hydraulic system and the yaw system, and verifying that the pressure of the hydraulic system and the yaw system has returned to zero by using a mechanical pressure gauge.

[0006] Preferably, in step S2, the tightening torque of the non-standard pull-out connector with ED sealing ring is 46 N·m, and the tightening torque of the steel pipe assembly is 26 N·m.

[0007] Preferably, the valves of the hydraulic system and yaw system are reset in state, including: Turn the manual overriding device handwheel at the tail end of the solenoid valve of the yaw circuit of the yaw system counterclockwise to loosen it; Tighten the pressure relief valve located on the main valve block of the hydraulic system clockwise with an Allen wrench, and then tighten the anti-loosening nut of the pressure relief valve with an open-end wrench.

[0008] Preferably, step S4 restores the power supply to the hydraulic station and increases the pressure to a preset value, including restoring the circuit breaker of the hydraulic pump motor in the engine room cabinet and pressurizing the hydraulic system pressure and yaw system pressure to 180 bar.

[0009] Preferably, step S4 involves checking for leaks at the connection between the non-standard extraction joint and the main return port T1 and the steel pipe assembly, specifically including: Apply a layer of leak detection agent with a thickness of 0.1-0.3mm evenly to the interface between the non-standard pull-out connector and the main return oil port T1, and the interface between the non-standard pull-out connector and the steel pipe assembly. Maintain hydraulic system pressure P at 180 bar for a duration ,in ; A high-precision pressure sensor is used to monitor the pressure change rate in real time at the interface between the non-standard pull-out connector and the main return port T1, and at the interface between the non-standard pull-out connector and the steel pipe assembly. The calculation formula is: ;in, To monitor the start time The detection value of high-precision pressure sensor one. To monitor the termination time The detection value of high-precision pressure sensor one. To monitor the start time, To monitor the termination time; The pressure change rate at the interface between the non-standard pull-out connector and the main return port T1 or at the interface between the non-standard pull-out connector and the steel pipe assembly If the connection is found to be leak-free, it should be checked; otherwise, the connection should be tightened again.

[0010] Preferably, step S4 monitors the residual pressure of the high-speed shaft brake in the non-braking state, specifically including: Pressure sensor 2 and pressure sensor 3 are installed at the oil inlet and oil outlet of the high-speed shaft brake, respectively, to record the oil inlet pressure value under non-braking conditions. and the pressure value at the oil outlet A flow rate sensor is installed inside the high-speed shaft brake pipe to detect the flow rate of hydraulic oil inside the high-speed shaft brake pipe. Based on the inlet pressure value under non-braking conditions and the pressure value at the oil outlet Calculate the residual pressure of the high-speed shaft brake. : ;in, This refers to the residual pressure of the high-speed shaft brake. The preset value for pressure loss along the pipeline, The friction factor is L, where L is the length of the high-speed shaft brake pipe, and d is the inner diameter of the high-speed shaft brake pipe. Indicates the density of hydraulic oil. This represents the detected value from flow rate sensor one. This is a preset value for local pressure loss; when If the residual pressure of the high-speed shaft brake in the non-braking state meets the requirements, it is determined that it does not meet the requirements. If not, it is necessary to check whether the internal seals of the high-speed shaft brake are damaged, and after taking appropriate measures, the residual pressure of the high-speed shaft brake in the non-braking state should be monitored again.

[0011] Preferably, the pressure prediction module predicts the pressure of the hydraulic system and the yaw system, and provides a pressure relief alarm based on the prediction results, including: S51, the pressure prediction module collects the pressure of the hydraulic system and yaw system for each monitoring cycle, and sorts the pressure of the hydraulic system and yaw system for several monitoring cycles based on the time sequence; S52. The pressures of the hydraulic system and yaw system after time-series rehearsal are respectively used as the first row elements of the prediction matrix corresponding to the hydraulic system and yaw system. The difference between the element to the right of each first row element and the element itself is used as the second row element corresponding to that element. The value of the last element in the second row is set to the same value as the value of the first element in the second row. The difference between the element to the left of each first row element and the element itself is used as the third row element corresponding to that element. The value of the first element in the third row is set to the same value as the last element in the third row. S53. Based on the elements in the first row, the second row, and the third row, construct the corresponding prediction matrices for the hydraulic system and the yaw system, respectively. S54. Based on the prediction matrices corresponding to the hydraulic system and yaw system respectively, obtain the pressure values ​​of the hydraulic system and yaw system for the next monitoring period. If the pressure value of the hydraulic system in the next monitoring period is greater than the preset hydraulic system pressure value, or the pressure value of the yaw system in the next monitoring period is greater than the preset yaw system pressure value, issue a pressure relief alarm.

[0012] Preferably, based on the elements of the first row, the second row, and the third row, a prediction matrix corresponding to the hydraulic system and the yaw system is constructed: ;in, For the prediction matrix corresponding to the hydraulic system or yaw system, The pressure of the hydraulic system or yaw system during the first monitoring cycle. The pressure of the hydraulic system or yaw system in the second monitoring cycle. The pressure of the hydraulic system or yaw system during the third monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle.

[0013] Preferred pressure values ​​for the hydraulic system and yaw system in the next monitoring cycle: Obtain the mean of all matrix elements in the third row of the prediction matrix corresponding to the hydraulic system or yaw system, and set the value of the last column of the prediction matrix to be equal to the mean of all matrix elements in the third row, thus obtaining a new matrix. Use the product of the rank of the new matrix and the pressure of the hydraulic system or yaw system in the i-th monitoring period as the rank of the new matrix. Pressure values ​​of the hydraulic system and yaw system for each monitoring cycle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention effectively solves the pressure cross-pressure problem in the high-speed shaft braking circuit of a hydraulic station through steps such as pressure relief, connector replacement, valve reset, and pressure boosting detection. The non-standard pull-out connector with an ED sealing ring, combined with precise tightening torque, improves the sealing performance of the connection, reducing the risk of hydraulic oil leakage. The pressure prediction module collects pressure data from multiple monitoring cycles and sorts it according to time sequence, using this data as the first row of the prediction matrix. The second and third rows are then generated by the difference between the left and right elements. After constructing the prediction matrix, the pressure value for the next cycle is calculated. An alarm is triggered when the predicted pressure exceeds a preset value, achieving proactive monitoring of system pressure. This matrix-based prediction method, combined with historical pressure data trends, can detect pressure anomalies in advance and trigger alarms, facilitating timely handling by staff and preventing problems such as brake failure and system malfunctions caused by pressure cross-pressure. This improves the stability and safety of the hydraulic station's operation. Furthermore, the standardized operating procedures and precise parameter control reduce maintenance costs and downtime. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram showing the location of the main return oil port T1 of the present invention. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0018] The present invention provides the following embodiments. Example 1 This invention provides a method for managing pressure cross-pressure in the high-speed shaft brake circuit of a hydraulic station, such as... Figure 1 As shown, it includes the following steps: S1. Depressurize the hydraulic and yaw systems; S2. Replace the connector at the main return port T1. At the main return port T1 position of the hydraulic station main valve block, remove the original sleeve connector and install a non-standard pull-out connector with ED sealing ring to the main return port T1. Connect the steel pipe assembly to the other end of the non-standard pull-out connector and mark it with an anti-loosening mark. S3. Reset the status of valves in the hydraulic system and yaw system; S4. Restore the power supply to the hydraulic station, increase the pressure to the preset value, and check whether there is leakage at the connection between the non-standard pull-out joint and the main return oil port T1 and the steel pipe assembly, and monitor the residual pressure of the high-speed shaft brake in the non-braking state. S5. Install a pressure prediction module in the hydraulic system and yaw system. The pressure prediction module is used to predict the pressure of the hydraulic system and yaw system and provide a pressure relief alarm based on the prediction results.

[0019] The working principle and beneficial effects of the above technical solution are as follows: The hydraulic system and yaw system are depressurized by shutting off the power to the hydraulic station motor, manually operating the pressure relief valve of the main valve block and the solenoid valve of the yaw circuit, releasing the system pressure and verifying it to zero using a mechanical pressure gauge. Then, the connector at the main return port T1 is replaced. The original sleeve connector is removed from the main return port T1 position of the hydraulic station's main valve block, a non-standard pull-out connector with an ED sealing ring is installed and connected to the steel pipe assembly, and an anti-loosening mark is applied. The valves of the hydraulic system and yaw system are then reset, including loosening the manual overriding device handwheel at the tail end of the yaw system solenoid valve counterclockwise, tightening the hydraulic system pressure relief valve clockwise and locking the anti-loosening nut. The power to the hydraulic station is then restored, and the system pressure is increased to 180 bar. Leakage at the connection points is checked, and the residual pressure of the high-speed shaft brake in its non-braking state is monitored. Finally, a pressure prediction module is installed in the system. By collecting pressure data, constructing a prediction matrix, and calculating the pressure value for the next cycle, a pressure relief alarm is issued when the predicted pressure exceeds the preset value. By implementing steps such as pressure relief, connector replacement, valve reset, and pressure boosting testing, the pressure cross-pressure problem in the high-speed shaft braking circuit of the hydraulic station can be effectively solved. Non-standard pull-out connectors with ED sealing rings, combined with precise tightening torque, improve the sealing performance of the connection, reducing the risk of hydraulic oil leakage. The pressure prediction module collects pressure data from multiple monitoring cycles and sorts it according to time sequence, using this data as the first row element of the prediction matrix. The second and third rows are then generated by the difference between the left and right elements. After constructing the prediction matrix, the pressure value for the next cycle is calculated. An alarm is triggered when the predicted pressure exceeds a preset value, achieving proactive monitoring of system pressure. This matrix-based prediction method, combined with historical pressure data trends, can detect pressure anomalies in advance and trigger alarms, facilitating timely handling by staff and preventing brake failure, system malfunctions, and other problems caused by pressure cross-pressure. This improves the stability and safety of the hydraulic station's operation. Furthermore, standardized operating procedures and precise parameter control reduce maintenance costs and downtime.

[0020] Example 2 Based on Example 1, preferably, step S1 includes turning off the power supply to the hydraulic station motor, manually operating the pressure relief valve and the solenoid valve in the yaw circuit located in the main valve block to release the pressure of the hydraulic system and the yaw system, and verifying that the pressure of the hydraulic system and the yaw system has returned to zero by using a mechanical pressure gauge.

[0021] Preferably, in step S2, the tightening torque of the non-standard pull-out connector with ED sealing ring is 46 N·m, and the tightening torque of the steel pipe assembly is 26 N·m.

[0022] Preferably, the valves of the hydraulic system and yaw system are reset in state, including: Turn the manual overriding device handwheel at the tail end of the solenoid valve of the yaw circuit of the yaw system counterclockwise to loosen it; Tighten the pressure relief valve located on the main valve block of the hydraulic system clockwise with an Allen wrench, and then tighten the anti-loosening nut of the pressure relief valve with an open-end wrench.

[0023] Preferably, step S4 restores the power supply to the hydraulic station and increases the pressure to a preset value, including restoring the circuit breaker of the hydraulic pump motor in the engine room cabinet and pressurizing the hydraulic system pressure and yaw system pressure to 180 bar.

[0024] The working principle and beneficial effects of the above technical solution are as follows: In step S1, after turning off the power to the hydraulic station motor, manually operate the pressure relief valve located in the main valve block and the solenoid valve in the yaw circuit to release the pressure in the hydraulic system and the yaw system. Monitor the pressure value in real time using a mechanical pressure gauge until the pressure is verified to be zero. In step S2, when replacing the connector at the main return port T1, use tools to remove the original sleeve connector and install the non-standard pull-out connector with an ED sealing ring to the main return port T1. Fix the non-standard pull-out connector with a tightening torque of 46 N·m. First, connect the steel pipe assembly to the other end of the non-standard pull-out connector, tighten it with a torque of 26 N·m and mark it with an anti-loosening mark. In step S3, when resetting the valve status, loosen the manual overriding device handwheel at the tail end of the yaw circuit solenoid valve of the yaw system counterclockwise, tighten the pressure relief valve of the hydraulic system located on the main valve block clockwise with an Allen wrench, and lock the anti-loosening nut of the pressure relief valve with an open wrench. In step S4, restore the hydraulic pump motor circuit breaker in the engine room cabinet and gradually pressurize the hydraulic system pressure and yaw system pressure to 180 bar. The specific procedures and verification methods for pressure relief operations are clearly defined to ensure complete release of system pressure and avoid safety hazards caused by pressurized operations. Non-standard pull-out connectors with ED sealing rings, when tightened with a torque of 46 N·m, allow for reasonable compression of the sealing ring, enhancing the sealing performance at the joint and preventing hydraulic oil leakage. A tightening torque of 26 N·m for the steel pipe assembly ensures both connection strength and prevents pipe deformation due to excessive torque. Standardized valve reset operations restore the valves of the hydraulic and yaw systems to their normal operating state, ensuring accurate system pressure control and precisely pressurizing the system pressure to 180 bar. This provides stable testing conditions for subsequent leak detection and pressure monitoring. These refined operational specifications improve the operability and reliability of the treatment methods, reduce human error, and ensure the normal operation of the high-speed shaft braking circuit of the hydraulic station.

[0025] Example 3 Based on Example 1, step S4 checks for leakage at the connection between the non-standard pull-out connector and the main return oil port T1 and the steel pipe assembly, specifically including: Apply a layer of leak detection agent with a thickness of 0.1-0.3mm evenly to the interface between the non-standard pull-out connector and the main return oil port T1, and the interface between the non-standard pull-out connector and the steel pipe assembly. Maintain hydraulic system pressure P at 180 bar for a duration ,in ; A high-precision pressure sensor is used to monitor the pressure change rate in real time at the interface between the non-standard pull-out connector and the main return port T1, and at the interface between the non-standard pull-out connector and the steel pipe assembly. The calculation formula is: ;in, To monitor the start time The detection value of high-precision pressure sensor one. To monitor the termination time The detection value of high-precision pressure sensor one. To monitor the start time, To monitor the termination time; The pressure change rate at the interface between the non-standard pull-out connector and the main return port T1 or at the interface between the non-standard pull-out connector and the steel pipe assembly If there is no leakage at the corresponding connection, it must be determined that there is no leakage at the connection; otherwise, the connection needs to be tightened again.

[0026] The working principle and beneficial effects of the above technical solution are as follows: When checking for leakage at the connection between the non-standard pull-out joint and the main return oil port T1 and the steel pipe assembly in step S4, first apply a leak detection agent with a thickness of 0.1-0.3mm evenly to the interface, allowing the leak detection agent to seep out under pressure to indicate the location of the leak. Then, maintain the hydraulic system pressure P at 180 bar for a stable duration. Sufficient pressure holding time is provided for leakage detection. At the same time, a high-precision pressure sensor is used to monitor the pressure change rate at the interface in real time. The sealing of the connection is judged by calculating the pressure change per unit time. When the pressure change rate is ≤0.02 bar / min, it is determined that there is no leakage; otherwise, the connection is tightened again. By applying a leak detector and maintaining pressure, leakage at the connection point can be detected intuitively and effectively. A high-precision pressure sensor, combined with a pressure change rate calculation formula, enables quantitative monitoring of leakage, avoiding errors from subjective judgment. The formula, by taking the absolute value of the pressure difference and dividing it by the time difference, accurately reflects the pressure decay rate, thereby judging the sealing performance of the connection. A leak detector thickness of 0.1-0.3mm ensures both detection sensitivity and avoids detection lag caused by excessive thickness. A pressure holding time of more than 5 minutes ensures that potential leaks are exposed within a sufficiently long period. A pressure change rate threshold of 0.02 bar / min provides a clear quantitative standard for leakage judgment. This multi-dimensional leakage detection method improves the accuracy and reliability of detection, enabling timely detection and handling of leaks at the connection point, preventing system pressure drops, brake failures, and other malfunctions caused by hydraulic oil leakage, and ensuring the safe and stable operation of the hydraulic station.

[0027] Example 4 Based on Example 1, step S4 monitors the residual pressure of the high-speed shaft brake in the non-braking state, specifically including: Pressure sensor 2 and pressure sensor 3 are installed at the oil inlet and oil outlet of the high-speed shaft brake, respectively, to record the oil inlet pressure value under non-braking conditions. and the pressure value at the oil outlet A flow rate sensor is installed inside the high-speed shaft brake pipe to detect the flow rate of hydraulic oil inside the high-speed shaft brake pipe. Based on the inlet pressure value under non-braking conditions and the pressure value at the oil outlet Calculate the residual pressure of the high-speed shaft brake. : ;in, This refers to the residual pressure of the high-speed shaft brake. The preset value for pressure loss along the pipeline, The friction factor is L, where L is the length of the high-speed shaft brake pipe, and d is the inner diameter of the high-speed shaft brake pipe. Indicates the density of hydraulic oil. This represents the detected value from flow rate sensor one. This is a preset value for local pressure loss; when If the residual pressure of the high-speed shaft brake in the non-braking state meets the requirements, it is determined that it does not meet the requirements. If not, it is necessary to check whether the internal seals of the high-speed shaft brake are damaged, and after taking appropriate measures, the residual pressure of the high-speed shaft brake in the non-braking state should be monitored again.

[0028] The working principle and beneficial effects of the above technical solution are as follows: By installing pressure sensors at the oil inlet and outlet, and combining the data from the flow rate sensor, the sealing status of the high-speed shaft brake is accurately assessed using a residual pressure calculation formula. This formula considers the influence of factors such as friction coefficient, pipe length, inner diameter, hydraulic oil density, and flow rate on pressure loss. Pipeline geometry parameters and The product of the fluid kinetic energy parameters is used to calculate the pressure loss along the friction path. Then, the preset value of local pressure loss is subtracted to make the calculation of residual pressure more consistent with the actual working conditions. The residual pressure threshold of 2 bar provides a clear judgment standard for the sealing performance of the brake. This precise residual pressure monitoring method can detect the damage of the internal seals of the brake in a timely manner, avoid problems such as abnormal wear and brake failure caused by excessive residual pressure, improve the reliability and safety of the high-speed shaft braking system, and provide a guarantee for the stable operation of the hydraulic station.

[0029] Example 5 Based on Example 1, the pressure prediction module predicts the pressure of the hydraulic system and the yaw system, and provides a pressure relief alarm based on the prediction results, including: S51, the pressure prediction module collects the pressure of the hydraulic system and yaw system for each monitoring cycle, and sorts the pressure of the hydraulic system and yaw system for several monitoring cycles based on the time sequence; S52. The pressures of the hydraulic system and yaw system after time-series rehearsal are respectively used as the first row elements of the prediction matrix corresponding to the hydraulic system and yaw system. The difference between the element to the right of each first row element and the element itself is used as the second row element corresponding to that element. The value of the last element in the second row is set to the same value as the value of the first element in the second row. The difference between the element to the left of each first row element and the element itself is used as the third row element corresponding to that element. The value of the first element in the third row is set to the same value as the last element in the third row. S53. Based on the elements in the first row, the second row, and the third row, construct the corresponding prediction matrices for the hydraulic system and the yaw system, respectively. S54. Based on the prediction matrices corresponding to the hydraulic system and yaw system respectively, obtain the pressure values ​​of the hydraulic system and yaw system for the next monitoring period. If the pressure value of the hydraulic system in the next monitoring period is greater than the preset hydraulic system pressure value, or the pressure value of the yaw system in the next monitoring period is greater than the preset yaw system pressure value, issue a pressure relief alarm.

[0030] The working principle and beneficial effects of the above technical solution are as follows: First, execute S51 to collect pressure data for each monitoring cycle and sort it based on time sequence. Then, execute S52 to use the sorted pressure as the first row element of the prediction matrix. Use the difference between the right element of each first row element and the element itself as the second row element, and set the last element of the second row to be the same as the first element. Use the difference between the left element of each first row element and the element itself as the third row element, and set the first element of the third row to be the same as the last element. Next, execute S53 to construct the prediction matrix based on the three rows of elements. Finally, execute S54 to obtain the mean of the third row elements in the prediction matrix. Set the value of the last column of the matrix to the mean to obtain a new matrix. Use the product of the rank of the new matrix and the pressure of the i-th monitoring cycle as the pressure value of the (i+1)-th monitoring cycle. When the predicted pressure exceeds the preset value, a pressure relief alarm is triggered. The pressure prediction module collects multi-cycle pressure data and sorts it according to time series. It then uses matrix operations to construct a prediction model. This method combines the changing trends of historical pressure data. The second row of elements reflects the pressure change difference between adjacent cycles, and the third row of elements reflects the reverse difference. This allows the prediction matrix to comprehensively capture the patterns of pressure fluctuations. The mean of the third row of elements is used as a supplement to the last column of the matrix. The pressure of the next cycle is predicted by multiplying the rank of the new matrix by the pressure of the current cycle, which improves the accuracy and reliability of the prediction. When the predicted pressure exceeds the preset value, an early alarm is triggered, realizing the transformation from passive handling to proactive prevention. Pressure relief measures can be triggered before pressure cross-pressure problems occur, avoiding system failures caused by abnormal pressure, reducing downtime and maintenance costs. At the same time, the standardized prediction process and quantified alarm thresholds make pressure monitoring more scientific and reasonable, improving the intelligent management level of the high-speed shaft braking circuit of the hydraulic station.

[0031] Example 6 Based on Example 5, a prediction matrix corresponding to the hydraulic system and the yaw system is constructed based on the elements of the first row, the second row, and the third row: ;in, For the prediction matrix corresponding to the hydraulic system or yaw system, The pressure of the hydraulic system or yaw system during the first monitoring cycle. The pressure of the hydraulic system or yaw system in the second monitoring cycle. The pressure of the hydraulic system or yaw system during the third monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle; Pressure values ​​for the hydraulic and yaw systems in the next monitoring cycle: Obtain the mean of all matrix elements in the third row of the prediction matrix corresponding to the hydraulic system or yaw system, and set the value of the last column of the prediction matrix to be equal to the mean of all matrix elements in the third row, thus obtaining a new matrix. Use the product of the rank of the new matrix and the pressure of the hydraulic system or yaw system in the i-th monitoring period as the rank of the new matrix. Pressure values ​​of the hydraulic system and yaw system for each monitoring cycle.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The prediction matrix construction method retains the original data through the first row of historical pressure values, the second row of adjacent differences reflects the rate of pressure change, and the third row of reverse differences supplements the data cycle, enabling the matrix to comprehensively describe the dynamic characteristics of pressure changes. The introduction of the mean of the elements in the third row balances the overall trend of historical differences and serves as a supplement to the last column of the matrix, enhancing the integrity of the matrix and the stability of the prediction. The product operation of the rank of the new matrix and the current period pressure combines the linear algebraic characteristics of the matrix with actual pressure data, making the prediction results closer to the real pressure change trend. This prediction algorithm based on matrix operations improves the accuracy and reliability of pressure prediction, can more accurately predict the risk of pressure surge, issue pressure relief alarms in advance, and help staff take timely measures to prevent brake circuit failures caused by abnormal pressure. At the same time, this method has strong logic and repeatability, providing a scientific and technical means for the intelligent monitoring of hydraulic station pressure systems and improving the safety and stability of the system.

[0033] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for managing pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station, characterized in that: Includes the following steps: S1. Depressurize the hydraulic and yaw systems; S2. Replace the connector at the main return port T1. At the main return port T1 position of the hydraulic station main valve block, remove the original sleeve connector and install a non-standard pull-out connector with ED sealing ring to the main return port T1. Connect the steel pipe assembly to the other end of the non-standard pull-out connector and mark it with an anti-loosening mark. S3. Reset the status of valves in the hydraulic system and yaw system; S4. Restore the power supply to the hydraulic station, increase the pressure to the preset value, and check whether there is leakage at the connection between the non-standard pull-out joint and the main return oil port T1 and the steel pipe assembly, and monitor the residual pressure of the high-speed shaft brake in the non-braking state. S5. Install a pressure prediction module in the hydraulic system and yaw system. The pressure prediction module is used to predict the pressure of the hydraulic system and yaw system and provide a pressure relief alarm based on the prediction results.

2. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Step S1 includes turning off the power to the hydraulic station motor, manually operating the pressure relief valve and the solenoid valve in the yaw circuit located on the main valve block to release the pressure of the hydraulic system and the yaw system, and verifying that the pressure of the hydraulic system and the yaw system has returned to zero by using a mechanical pressure gauge.

3. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: In step S2, the tightening torque for the non-standard pull-out connector with the ED sealing ring is 46 N·m, and the tightening torque for the steel pipe assembly is 26 N·m.

4. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Reset the status of valves in the hydraulic and yaw systems, including: Turn the manual overriding device handwheel at the tail end of the solenoid valve of the yaw circuit of the yaw system counterclockwise to loosen it; Tighten the pressure relief valve located on the main valve block of the hydraulic system clockwise with an Allen wrench, and then tighten the anti-loosening nut of the pressure relief valve with an open-end wrench.

5. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Step S4 restores power to the hydraulic station and increases the pressure to the preset value, including restoring the circuit breaker of the hydraulic pump motor in the engine room cabinet and pressurizing the hydraulic system pressure and yaw system pressure to 180 bar.

6. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Step S4 checks for leaks at the connection between the non-standard pull-out connector and the main return port T1 and the steel pipe assembly, specifically including: Apply a layer of leak detection agent with a thickness of 0.1-0.3mm evenly to the interface between the non-standard pull-out connector and the main return oil port T1, and the interface between the non-standard pull-out connector and the steel pipe assembly. Maintain hydraulic system pressure P at 180 bar for a duration ,in ; A high-precision pressure sensor is used to monitor the pressure change rate in real time at the interface between the non-standard pull-out connector and the main return port T1, and at the interface between the non-standard pull-out connector and the steel pipe assembly. The calculation formula is: ;in, To monitor the start time The detection value of high-precision pressure sensor one. To monitor the termination time The detection value of high-precision pressure sensor one. To monitor the start time, To monitor the termination time; The pressure change rate at the interface between the non-standard pull-out connector and the main return port T1 or at the interface between the non-standard pull-out connector and the steel pipe assembly If the connection is found to be leak-free, it should be checked; otherwise, the connection should be tightened again.

7. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Step S4 monitors the residual pressure of the high-speed shaft brake in the non-braking state, specifically including: Pressure sensor 2 and pressure sensor 3 are installed at the oil inlet and oil outlet of the high-speed shaft brake, respectively, to record the oil inlet pressure value under non-braking conditions. and the pressure value at the oil outlet A flow rate sensor is installed inside the high-speed shaft brake pipe to detect the flow rate of hydraulic oil inside the high-speed shaft brake pipe. Based on the inlet pressure value under non-braking conditions and the pressure value at the oil outlet Calculate the residual pressure of the high-speed shaft brake. : ;in, This refers to the residual pressure of the high-speed shaft brake. The preset value for pressure loss along the pipeline, The friction factor is L, where L is the length of the high-speed shaft brake pipe, and d is the inner diameter of the high-speed shaft brake pipe. Indicates the density of hydraulic oil. This represents the detected value from flow rate sensor one. This is a preset value for local pressure loss; when If the residual pressure of the high-speed shaft brake in the non-braking state meets the requirements, it is determined that it does not meet the requirements. If not, it is necessary to check whether the internal seals of the high-speed shaft brake are damaged, and after taking appropriate measures, the residual pressure of the high-speed shaft brake in the non-braking state should be monitored again.

8. The method for controlling pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: The pressure prediction module predicts the pressure of the hydraulic system and yaw system, and provides pressure relief alarms based on the prediction results, including: S51, the pressure prediction module collects the pressure of the hydraulic system and yaw system for each monitoring cycle, and sorts the pressure of the hydraulic system and yaw system for several monitoring cycles based on the time sequence; S52. The pressures of the hydraulic system and yaw system after time-series rehearsal are respectively used as the first row elements of the prediction matrix corresponding to the hydraulic system and yaw system. The difference between the element to the right of each first row element and the element itself is used as the second row element corresponding to that element. The value of the last element in the second row element is set to the same value as the value of the first element in the second row element. The difference between the element to the left of each first row element and the element itself is used as the third row element corresponding to that element. The value of the first element in the third row element is set to the same value as the last element in the third row element. S53. Based on the elements in the first row, the second row, and the third row, construct the corresponding prediction matrices for the hydraulic system and the yaw system, respectively. S54. Based on the prediction matrices corresponding to the hydraulic system and yaw system respectively, obtain the pressure values ​​of the hydraulic system and yaw system for the next monitoring period. If the pressure value of the hydraulic system in the next monitoring period is greater than the preset hydraulic system pressure value, or the pressure value of the yaw system in the next monitoring period is greater than the preset yaw system pressure value, issue a pressure relief alarm.

9. A method for managing pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 8, characterized in that: Based on the elements in the first, second, and third rows, construct the prediction matrices corresponding to the hydraulic system and the yaw system: ;in, For the prediction matrix corresponding to the hydraulic system or yaw system, The pressure of the hydraulic system or yaw system during the first monitoring cycle. The pressure of the hydraulic system or yaw system in the second monitoring cycle. The pressure of the hydraulic system or yaw system during the third monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle. For the first The pressure of the hydraulic system or yaw system during each monitoring cycle.

10. A method for managing pressure cross-pressure in a high-speed shaft brake circuit of a hydraulic station according to claim 1, characterized in that: Pressure values ​​for the hydraulic and yaw systems in the next monitoring cycle: Obtain the mean of all matrix elements in the third row of the prediction matrix corresponding to the hydraulic system or yaw system, and set the value of the last column of the prediction matrix to be equal to the mean of all matrix elements in the third row, thus obtaining a new matrix. Use the product of the rank of the new matrix and the pressure of the hydraulic system or yaw system in the i-th monitoring period as the rank of the new matrix. Pressure values ​​of the hydraulic system and yaw system for each monitoring cycle.

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