Hydropower station governor oil pressure device capable of improving stability and control method thereof

Abstract

The invention discloses a hydropower station governor oil pressure device capable of improving stability and a control method thereof, and relates to the technical field of hydropower station governor oil pressure devices, the hydropower station governor oil pressure device comprises a bottom plate and a control module, a pressure tank and an oil pumping assembly are arranged on the upper side of the bottom plate, and the pressure tank is used for storing compressed air and hydraulic oil; a pressure detection module is arranged on the front side of the pressure tank, the pressure detection module is electrically connected with the control module, the pressure detection module is used for detecting the pressure in the pressure tank, the oil pumping assembly is used for pumping hydraulic oil into the pressure tank, and a mixing mechanism is arranged on the upper side of the pressure tank. By arranging the guide plate and the mixing pump machine, up-down circulating flow can be formed in the oil supplementing process, a complete oil liquid circulating path is established in the forced mixing stage, the temperature difference and the density difference of oil liquid in the tank are rapidly eliminated, and the oil supplementing device has the advantages of being high in practicability and improving the stability and the reliability of a speed regulating system.

Description

Technical Field

[0001] This invention relates to the technical field of hydraulic governor devices for hydropower stations, specifically to a hydraulic governor device for hydropower stations that can improve stability and its control method. Background Technology

[0002] As the core control unit for the operation of the hydropower station, the stability of the speed regulation system is directly related to the power regulation quality of the unit and the stability of the power grid frequency. As the power source of the speed regulation system, the main function of the governor hydraulic device is to provide stable and reliable hydraulic oil to the actuators to ensure that the regulating components such as guide vanes and needle valves can respond to control commands quickly and accurately. However, in the existing technology, the hydraulic device still has a number of key problems that affect the stability of the system during long-term operation. First, pressure tanks typically store both compressed air and hydraulic oil. Due to the simple internal structure and limited oil circulation path, hydraulic oil is prone to temperature and density stratification during replenishment, discharge, and temperature changes, resulting in uneven oil properties. When oil stratification is severe, the speed governor is prone to exhibiting slow response and insufficient execution under heavy load changes, which in turn affects the stability of the unit's power regulation. Secondly, the lack of effective mixing measures in the oil pumping process makes it difficult to fully disturb and detect impurities and moisture at the bottom of the tank. After moisture enters the hydraulic system, it will cause hydraulic oil emulsification, corrosion of metal parts, and reduction of lubrication performance, thereby increasing oil pump noise, weakening the power of the actuator, and ultimately affecting the reliability of the governor's operation. However, most traditional equipment relies on manual periodic checks of water content, which makes it difficult to detect oil quality deterioration in time, posing a potential stability risk. In actual operation, the oil-water mixing detection module and other sensors are easily affected by deposited impurities and oil stains, causing the detection data to deviate or even fail. When the probe surface is contaminated, the water content judgment will be inaccurate, which may lead to false alarms or missed detections. This not only increases the difficulty of maintenance but also causes the speed control system to continue to operate under abnormal conditions, creating a safety hazard. Existing devices generally lack online self-cleaning structures, resulting in a significant decrease in detection reliability during long-term operation. Finally, when the system is shut down for a long time or operates at low load, the oil in the tank becomes passively still, and water and impurities will gradually settle to the bottom area. When the system is restarted, these deposits may be instantly drawn into the oil circuit, causing a sudden increase in water content or unstable valve operation, which will cause the speed governor to fluctuate significantly during the start-up phase and seriously affect the overall stability of the speed control system. In summary, existing hydraulic governor systems in hydropower stations generally suffer from problems such as difficulty in eliminating oil stratification, difficulty in real-time monitoring of oil quality, insufficient reliability of water content detection, lack of online maintenance methods for key sensors, and weak oil mixing capacity. These problems directly affect the stability of the speed control system during operation. Therefore, there is an urgent need for a hydraulic governor system and its control method that can enhance oil circulation and mixing, stabilize oil properties, monitor and accurately identify oil quality anomalies in real time, and have online self-cleaning function for sensors, so as to comprehensively improve the stability and reliability of the speed control system. Summary of the Invention

[0003] The purpose of this invention is to provide a hydraulic device for a hydropower station governor that can improve stability and its control method, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydraulic device for a hydropower station speed governor that can improve stability, including a base plate and a control module, wherein a pressure tank and a pump assembly are provided on the upper side of the base plate; The pressure tank is used to store compressed air and hydraulic oil, and a pressure detection module is provided on the front side of the pressure tank. The pressure detection module is electrically connected to the control module, and the pressure detection module is used to detect the internal pressure of the pressure tank. The oil pump assembly is used to pump hydraulic oil into the pressure tank. A mixing mechanism is provided on the upper side of the pressure tank, and the mixing mechanism includes: A mixing pump and connecting components, the mixing pump being used to circulate hydraulic oil inside a pressure tank; The hydraulic oil inside the pressure tank occupies one-third of the total volume of the pressure tank. Furthermore, both the output and input ends of the mixing pump extend into the hydraulic oil via connecting components; The hybrid mechanism further includes: The detection mechanism and fixed components include an oil-water mixture detection module, which is used to detect the change in dielectric constant of the oil-water mixture to measure the water content.

[0005] According to the above technical solution, the pressure tank is provided with an oil inlet, an oil outlet, an air inlet, and an inspection port. There are two oil inlets, the oil outlet is located on the lower right side of the pressure tank, and the two oil inlets are located on the lower front side of the pressure tank, with the oil inlets higher than the oil outlets. The inspection port is located on the upper left side of the pressure tank, and the air inlet is located on the upper right side of the pressure tank. There are two sets of oil pumping assemblies, with each set corresponding to one of the two oil inlets.

[0006] According to the above technical solution, the oil pump assembly includes an oil pump, the lower side of which is fixedly connected to the upper side of the base plate, the output end of which is fixedly connected to a delivery pipe, the other end of which is provided with a valve, the output end of which is fixedly connected to the oil inlet, and a flow detection module is provided in the middle of the delivery pipe. The output end of the oil pump is connected to the inside of the oil inlet through the delivery pipe and the valve.

[0007] According to the above technical solution, the oil pump and the flow detection module are both electrically connected to the control module. The start and stop of the oil pump are controlled by the control module, and the flow detection module is used to detect the hydraulic oil flow and output it to the control module.

[0008] According to the above technical solution, a guide plate is fixedly connected to the lower front part of the pressure tank. The upper part of the guide plate has a sloping structure with a high outer edge and a low center, and the guide plate is located on the lower side of the oil inlet near the inside of the pressure tank.

[0009] According to the above technical solution, the connecting component includes a fixed pipe, which is a tubular structure located inside the pressure tank, and the upper side of the fixed pipe extends to the upper side of the outside of the pressure tank. The outer wall of the fixed pipe is fixedly connected to the inner wall of the pressure tank. A vibration damping frame is fixedly connected to the upper side of the fixed pipe. The upper side of the vibration damping frame is fixedly connected to the outer wall of the mixing pump. The output and input ends of the mixing pump are respectively provided with a drain pipe and a liquid inlet pipe.

[0010] According to the above technical solution, the inlet pipe and the outlet pipe extend to the lower side of the fixed pipe inside the pressure tank at the far end of the mixing pump. The fixed pipe is located in the middle of the pressure tank. The upper end of the inlet pipe is connected to the input end of the mixing pump. The lower end of the inlet pipe is higher than the lower end of the outlet pipe. The lower end of the inlet pipe is located on the upper side of the center of the guide plate.

[0011] According to the above technical solution, the fixing component includes a fixing block, the inner wall of which is fixedly connected to the outer wall of the oil-water mixing detection module. The fixing component also includes a guide bucket, which is an inverted funnel with a lower inner diameter larger than the upper inner diameter. The upper end of the guide bucket is fixedly connected to the lower end of the drain pipe, and the guide bucket is located on the upper side of the oil-water mixing detection module.

[0012] According to the above technical solution, the inner wall of the guide bucket is rotatably connected to a rotating block via a bearing. The rotating block has a spindle-shaped structure. A fan blade is fixedly connected to the lower side of the outer wall of the rotating block. A cleaning brush is fixedly connected to the lower end of the rotating block. The lower side of the cleaning brush is in contact with the outer wall of the oil-water mixing detection module.

[0013] A control method for a hydraulic governor in a hydropower station that can improve stability includes the following steps: Step 1: The pressure detection module monitors the pressure status inside the pressure tank in real time and transmits the data to the control module. When the pressure value is lower than the set value, the control module issues a command to start the oil pump assembly and enter the oil replenishment process. Step 2: The control module starts the oil pump. Hydraulic oil enters the inlet through the delivery pipe and valve. During the oil replenishment process, the flow detection module monitors the oil delivery flow in real time and returns the data to the control module for oil replenishment quantity determination and safety control. Step 3: The hydraulic oil added to the pressure tank impacts the guide plate to form an up-and-down circulation, causing the hydraulic oil in the tank to undergo shearing, disturbance and large-scale circulation, thereby eliminating oil temperature stratification and improving the homogeneity of the oil. Step 4: When oil replenishment is completed, during long-term shutdown, or when abnormalities are detected, the control module starts the mixing pump. The mixing pump draws oil through the inlet pipe and then sprays it into the bottom of the fixed pipe through the outlet pipe, thus achieving forced mixing and circulation inside the pressure tank. Step 5: During the mixing process, the oil-water mixing detection module is located at the end of the drain pipe. It is used to monitor the dielectric constant of the oil and calculate the water content. The control module identifies whether the oil has stratification between upper and lower layers based on the sudden change in water content at the beginning of mixing, and records the stable water content after mixing as the basis for subsequent health monitoring. Step 6: After each mixing cycle, the control module continuously reads the water content change trend from the oil-water mixing detection module. If the water content continues to rise, it is determined that there may be external water seepage, and a maintenance signal is sent. If the abnormality occurs before mixing but recovers after mixing, it is considered local water accumulation, and the recorded event is automatically cleared. Step 7: When the mixing pump is running, the high-speed discharge impacts the fan blades, driving the rotating block and cleaning brush to rotate. The cleaning brush contacts the surface of the oil-water mixing detection module probe, realizing online cleaning of the probe and ensuring that the detection accuracy remains stable over a long period of time. Step 8: After the mixing pump stops, the oil flow stops, and the detection mechanism returns a stable water content measurement value. The control module performs a diagnosis based on this value and historical data. If the abnormality persists, the fault is confirmed and reported; otherwise, the current control process ends.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting up a pressure detection module and a pump oil mechanism for linkage control, can monitor the internal pressure of the pressure tank in real time and automatically complete the oil replenishment, so that the oil replenishment amount corresponds precisely with the pressure state. The actual flow rate during the oil delivery process is further verified by the flow detection module, which effectively avoids the delay in speed regulation execution caused by insufficient pressure or abnormal oil replenishment, thereby significantly improving the pressure stability of the oil pressure source during operation. By setting up a guide plate and a mixing pump, an up-and-down circulating flow can be formed during the oil replenishment process, and a complete oil circulation path can be established during the forced mixing stage. This allows the temperature and density differences of the oil in the tank to be quickly eliminated. This structure effectively overcomes the problem of oil stratification in traditional tanks, ensuring that the properties of hydraulic oil remain uniform over a long period of time, thereby enhancing the response stability of the speed control system under rapid load change conditions. By setting up an oil-water mixing detection module and a flow guide bucket, the discharge can be detected in real time at the initial stage of mixing. The change in water content can be used to determine whether there is stratification or hidden water ingress in the oil. Combined with the trend analysis function of the control module, abnormal states such as slow water seepage or local water accumulation can be identified in advance, enabling predictive maintenance. This allows water problems to be discovered and dealt with in the early stage, thereby significantly improving the accuracy of oil quality monitoring and the reliability of system operation. By setting up an online self-cleaning mechanism consisting of fan blades, rotating blocks, and cleaning brushes, the cleaning brushes can be automatically rotated using the kinetic energy of the mixing pump to periodically clean the probe of the oil-water mixing detection module. This process requires no external energy consumption and is synchronized with the mixing action, which can continuously maintain the clean state of the sensor surface, avoid measurement drift, and make the detection accuracy stable in the long term, thereby improving the long-term stability of the overall operation of the hydraulic device. 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 three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the pump assembly structure of the present invention; Figure 3 This is a schematic diagram of the pressure tank structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the pressure tank of the present invention; Figure 5 This is a schematic diagram of the hybrid mechanism structure of the present invention; Figure 6 This is the present invention. Figure 4 A magnified structural diagram of A in the middle; Figure 7 This is a schematic diagram of the detection mechanism structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the guide bucket of the present invention; In the diagram: 1. Base plate; 2. Pressure tank; 3. Oil pump assembly; 4. Mixing mechanism; 5. Pressure detection module; 6. Oil inlet; 7. Oil outlet; 8. Air inlet; 9. Inspection port; 10. Guide plate; 301. Oil pump; 302. Delivery pipe; 303. Valve; 304. Flow detection module; 401. Fixed pipe; 402. Vibration damping frame; 403. Mixing pump; 404. Liquid inlet pipe; 405. Liquid outlet pipe; 406. Detection mechanism; 601. Fixed block; 602. Oil-water mixture detection module; 603. Guide bucket; 604. Rotating block; 605. Fan blade; 606. Cleaning brush. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figure 1-5 The present invention provides a technical solution: a hydraulic device for a hydropower station speed governor that can improve stability, including a base plate 1 and a control module. A pressure tank 2 and a pump assembly 3 are provided on the upper side of the base plate 1. The pressure tank 2 is used to store compressed air and hydraulic oil. A pressure detection module 5 is provided on the front side of the pressure tank 2. The pressure detection module 5 is electrically connected to the control module and is used to detect the internal pressure of the pressure tank 2. The pump assembly 3 is used to pump hydraulic oil into the pressure tank 2. The hydraulic oil inside the pressure tank 2 occupies one-third of the total volume of the pressure tank 2. The pressure tank 2 is provided with an oil inlet 6, an oil outlet 7, an air inlet 8, and an inspection port 9. There are two oil inlets 6. The oil outlet 7 is located on the lower right side of the pressure tank 2. The two oil inlets 6 are located on the lower front side of the pressure tank 2, with the oil inlets 6 higher than the oil outlet 7. The inspection port 9 is located on the upper left side of the pressure tank 2. The air inlet 8 is located on the upper right side of the pressure tank 2. There are two sets of oil pumping assemblies 3, with the two sets of oil pumping assemblies 3 corresponding to the two oil inlets 6. A guide plate 10 is fixedly connected to the lower front of the inner side of the pressure tank 2. The upper side of the guide plate 10 has a sloping structure with a high front and a low rear, and the guide plate 10 is located on the lower side of the oil inlet 6 near the inside of the pressure tank 2. The oil pump assembly 3 includes an oil pump 301. The lower side of the oil pump 301 is fixedly connected to the upper side of the base plate 1. The output end of the oil pump 301 is fixedly connected to a delivery pipe 302. The other end of the delivery pipe 302 is provided with a valve 303. The output end of the valve 303 is fixedly connected to the oil inlet 6. A flow detection module 304 is provided in the middle of the delivery pipe 302. The output end of the oil pump 301 is connected to the inside of the oil inlet 6 through the delivery pipe 302 and the valve 303. The oil pump 301 and the flow detection module 304 are both electrically connected to the control module. The start and stop of the oil pump 301 are controlled by the control module. The flow detection module 304 is used to detect the hydraulic oil flow and output it to the control module. The hydropower station's speed regulation system is in normal operation. The pressure detection module 5 reads the internal pressure of the pressure tank 2 in real time. The oil pump assembly 3 starts under the command of the control module according to the system pressure requirements. The input end of the oil pump 301 is connected to the return oil tank. When the oil pump assembly 3 starts, hydraulic oil is drawn by the oil pump 301 and enters the inlet 6 through the delivery pipe 302 and valve 303. It is then pumped into the pressure tank 2 through the inlet 6. During this process, the flow detection module 304 detects the oil volume. When the oil pump assembly 3 passes through the inlet... When hydraulic oil is pumped into the pressure tank 2, the upper layer of hydraulic oil drives the oil body to move, and the lower layer of hydraulic oil impacts the upper inclined surface of the guide plate 10, forming an inertia of up and down movement. Since the guide plate 10 is designed as an inclined structure with a high front and a low rear, the direction of movement changes after the oil flow impacts, from the lateral direction to the up and down movement of the tank body. This moving oil flow generates strong shear and disturbance with the original oil body in the tank, forming a large-scale circulating vortex. This process effectively breaks the temperature stratification that may be formed due to uneven local heat exchange. When the oil replenishment task is completed, the oil pump assembly 3 will stop running under the command of the control module. However, the internal oil flow disturbance caused by the oil pump will continue for a period of time before eventually stabilizing. This embodiment utilizes the function of the pump oil itself and, through the structure of the guide plate 10, extends the single oil replenishment action into an effective stirring of the oil in the tank, realizing the reuse of energy, passively and efficiently promoting the equilibrium of oil temperature, and providing a more stable power source for the speed regulation system.

[0018] Example 2: Please refer to Figure 1-8 Based on Embodiment 1, the present invention provides the following technical solution: A mixing mechanism 4 is provided on the upper side of the pressure tank 2. The mixing mechanism 4 includes a mixing pump 403 and a connecting assembly. The mixing pump 403 is used to circulate the hydraulic oil inside the pressure tank 2. The output end and input end of the mixing pump 403 extend into the hydraulic oil through the connecting assembly. The connecting assembly includes a fixed pipe 401, which is a tubular structure located inside the pressure tank 2. The upper side of the fixed pipe 401 extends to the upper side of the outside of the pressure tank 2. The outer wall of the fixed pipe 401 is fixedly connected to the inner wall of the pressure tank 2. A vibration damping frame 402 is fixedly connected to the upper side of the fixed pipe 401. The upper side of the vibration damping frame 402 is fixedly connected to the outer wall of the mixing pump 403. The output and input ends of the mixing pump 403 are respectively provided with a drain pipe 405 and an inlet pipe 404.

[0019] The inlet pipe 404 and the outlet pipe 405 extend from the far end of the mixing pump 403 to the lower side of the fixed pipe 401 located inside the pressure tank 2, and the fixed pipe 401 is located in the middle of the pressure tank 2. The upper end of the inlet pipe 404 is connected to the input end of the mixing pump 403, and the lower end of the inlet pipe 404 is higher than the lower end of the outlet pipe 405. The lower end of the inlet pipe 404 is located on the upper side of the rear of the guide plate 10. The mixing mechanism 4 also includes a detection mechanism 406 and a fixing component. The detection mechanism 406 includes an oil-water mixture detection module 602, which is used to detect the change in dielectric constant of the oil-water mixture to measure the water content. The fixing component includes a fixing block 601, the inner wall of which is fixedly connected to the outer wall of the oil-water mixture detection module 602. The fixing component also includes a guide bucket 603, which is an inverted funnel with a lower inner diameter larger than the upper inner diameter. The upper end of the guide bucket 603 is fixedly connected to the lower end of the drain pipe 405, and the guide bucket 603 is located on the upper side of the oil-water mixture detection module 602.

[0020] A rotating block 604 is rotatably connected to the inner wall of the guide bucket 603 via a bearing. The rotating block 604 has a spindle-shaped structure. A fan blade 605 is fixedly connected to the lower side of the outer wall of the rotating block 604. A cleaning brush 606 is fixedly connected to the lower end of the rotating block 604. The lower side of the cleaning brush 606 is in contact with the outer wall of the oil-water mixing detection module 602. When the control module decides to start forced mixing according to the strategy, such as before or after the start of the oil pump assembly 3, or during a long-term system shutdown, the mixing pump 403 in the mixing mechanism 4 is activated. The mixing pump 403 draws oil from the lower part of the fixed pipe 401 through its inlet pipe 404, pressurizes it, and discharges it from the bottom of the fixed pipe 401 through the drain pipe 405. This jet directly acts on the bottom area of ​​the tank, causing water and metal shavings that may have settled there to be re-rolled up and participate in the circulation of the entire tank. At the same time, the oil-water mixing detection module 602 located at the end of the drain pipe 405 starts monitoring. In the initial stage of mixing, it first comes into contact with the oil drawn from the upper layer, which may have a lower water content. If the detection value changes rapidly and significantly and exceeds the threshold at this time, it means that there is a serious difference between the upper and lower layers of oil in the tank, that is, oil stratification. At this time, the control module sends a maintenance signal to the receiving terminal. After the mixing process continues for a preset time, the mixing pump 403 stops, the oil-water mixture detection module 602 records the stable water content value after uniform mixing, and starts a timed calculation program to continuously monitor the rising gradient of this value. This embodiment not only actively eliminates oil quality inhomogeneity, but more importantly, by analyzing the data jumps in the oil-water mixing detection module 602 during the initial mixing stage, it achieves early diagnosis of the oil stratification state in the tank. At the same time, by monitoring the rate of increase in water content, it provides a quantitative basis for whether there is a slow leak in the system, thus realizing predictive maintenance.

[0021] Example 3: Please refer to Figure 1-8 Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: when the speed regulation system is normally shut down and the oil inside the pressure tank 2 is in a state of long-term stasis, the oil-water mixing detection module 602, under the management of the control module, still maintains low-power normal monitoring operation. The control module continuously reads the measurement data from the oil-water mixing detection module 602. Once it detects abnormal fluctuations in the reading or a slow but continuous trend of exceeding the standard, the control module will not immediately determine it as a system fault. Instead, it will first start the mixing mechanism 4 to work for one cycle. The logic is that the abnormal reading at this time may be due to the local accumulation of water near the detection module. The purpose of forced mixing is to eliminate this local phenomenon in order to verify whether it is a real, global deterioration of the oil. After mixing is complete, the control module reads the stable value from the oil-water mixture detection module 602 again. If the value returns to normal, the system records this event as a localized water accumulation that has been resolved. If the value still exceeds the limit, the control module is certain that a real oil problem has occurred, and then sends a clear maintenance signal to the control terminal. This embodiment effectively distinguishes between false and real faults through the logic of "monitoring, action, and verification," avoiding false alarms. At the same time, it can provide accurate early warnings of early signs of oil deterioration or water intrusion, guiding maintenance personnel to take targeted measures.

[0022] Example 4: Please refer to Figure 1-8 Based on Embodiments 1, 2 and 3, the present invention provides a technical solution: whenever the mixing mechanism 4 is started, the mixing pump 403 pumps the oil out from the drain pipe 405, and the cleaning process starts automatically and synchronously. The oil flow discharged from the end of the drain pipe 405 directly impacts the fan blade 605 installed in the guide bucket 603. The kinetic energy of the oil flow is converted into mechanical energy, driving the fan blade 605, the rotating block 604 and the cleaning brush 606 fixed at its lower end to rotate together. The bristles of the cleaning brush 606 gently and continuously brush the surface of the sensing probe of the oil-water mixing detection module 602. In addition, since the rotating block 604 is designed with a spindle-shaped structure, it plays a role in converging and guiding the downward oil flow, so that the flushing oil flow acts more concentratedly on the probe surface. As the mixing pump 403 stops, the oil flow disappears, and the cleaning brush 606 also stops rotating, thus ending a complete online self-cleaning process. This embodiment converts the hydraulic kinetic energy generated by the hybrid function into the mechanical action of the cleaning probe through the mechanical structure of the fan blade 605 and the spindle-shaped rotating block 604. This enables uninterrupted and energy-free autonomous maintenance of key instruments during normal equipment operation, fundamentally ensuring the long-term accuracy and reliability of the oil-water mixing detection module 602.

[0023] This application also discloses a control method for a hydraulic governor device in a hydropower station that can improve stability, comprising the following steps: Step 1: Pressure monitoring and oil replenishment control based on pressure detection module 5: The pressure detection module 5 detects the pressure status in pressure tank 2 in real time and transmits the data to the control module. When the pressure value is lower than the set value, the control module issues a command to start the oil pump assembly 3 and enter the oil replenishment process. Step 2: Drive the oil pump assembly 3 to complete oil replenishment and flow monitoring: The control module starts the oil pump 301, and the hydraulic oil enters the oil inlet 6 through the delivery pipe 302 and valve 303. During the oil replenishment process, the flow detection module 304 monitors the oil delivery flow in real time and returns the data to the control module for oil replenishment quantity determination and safety control. Step 3: Use the guide plate 10 to achieve natural agitation during the oil replenishment process: The hydraulic oil replenished into the pressure tank 2 impacts the guide plate 10 to form an up-and-down circulating flow, causing the hydraulic oil in the tank to undergo shearing, disturbance and large-scale circulation, thereby eliminating oil temperature stratification and improving the homogeneity of the oil. Step 4: Start the mixing mechanism 4 to perform forced circulation mixing of the oil: When oil replenishment is completed, during long-term shutdown, or when abnormalities are detected, the control module starts the mixing pump 403. The mixing pump 403 draws oil through the inlet pipe 404 and then sprays it into the bottom of the fixed pipe 401 through the drain pipe 405 to achieve forced mixing circulation inside the pressure tank 2. Step 5: Monitor water content and identify oil stratification through detection mechanism 406: During the mixing process, the oil-water mixing detection module 602 is located at the end of the drain pipe 405. It is used to monitor the dielectric constant of the oil and calculate the water content. The control module identifies whether the oil has stratification between upper and lower layers based on the sudden change in water content at the beginning of mixing, and records the stable water content after mixing as the basis for subsequent health monitoring. Step 6: Fault identification and early warning based on water content change trend: After the mixing cycle, the control module continuously reads the water content change trend of the oil-water mixing detection module 602. If the water content continues to rise, it is determined that there may be external water seepage, and a maintenance signal is sent. If the abnormality occurs before mixing and recovers after mixing, it is identified as local water accumulation, and the abnormal event record is automatically cleared. Step 7: Online self-cleaning is achieved using the guide bucket 603 and the fan blade 605: When the mixing pump 403 is running, the high-speed discharge impacts the fan blade 605, which drives the rotating block 604 and the cleaning brush 606 to rotate. The cleaning brush 606 contacts the probe surface of the oil-water mixing detection module 602 to achieve online cleaning of the probe and ensure that the detection accuracy remains stable over a long period of time. Step 8: Data verification and status confirmation after mixing: After the mixing pump 403 stops, the oil flow stops, and the detection mechanism 406 returns a stable water content measurement value. The control module performs diagnosis based on this value and historical data. If the abnormality continues, the fault is confirmed and reported; otherwise, the current control process ends.

[0024] This solution discloses a hydraulic pressure device and its control method for improving the stability of a hydropower station governor. The main body of the device includes a base plate 1 and a pressure tank 2 on it. The tank side is equipped with an oil pump assembly 3 and a pressure detection module 5. The key innovation is the mixing mechanism 4 integrated on the top of the tank. Its core is a mixing pump 403, which forms a forced circulation loop in the tank through a fixed pipe 401, an inlet pipe 404 and an outlet pipe 405 to eliminate oil stratification. At the end of the loop, an oil-water mixing detection module 602 is integrated. It is equipped with a self-cleaning component consisting of a guide bucket 603, a fan blade 605 and a cleaning brush 606. The pump uses the kinetic energy of the oil discharge to drive the rotation, realizing online cleaning of the probe. The guide plate 10 guides the replenished oil flow to promote natural mixing. The control method links the oil pump assembly 3 and the mixing mechanism 4. Based on pressure, oil-water data and time strategy, it realizes homogenization during operation, monitoring during shutdown, abnormal warning and instrument self-maintenance, systematically improving the stability and reliability of the hydraulic pressure source.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water power station governor oil pressure device with improved stability, comprising a base plate (1) and a control module, characterized in that: The upper side of the bottom plate (1) is provided with a pressure tank (2) and a pump oil assembly (3); The pressure tank (2) is used for storing compressed air and hydraulic oil, and a pressure detection module (5) is arranged on the pressure tank (2); The pressure detection module (5) is electrically connected with the control module, and the pressure detection module (5) is used for detecting the internal pressure of the pressure tank (2); The pump oil assembly (3) is used for pumping hydraulic oil into the pressure tank (2); The upper side of the pressure tank (2) is provided with a mixing mechanism (4), and the mixing mechanism (4) comprises: A mixing pump (403) and a connecting assembly, the mixing pump (403) is used for circulating the hydraulic oil in the pressure tank (2); And the output end and the input end of the mixing pump (403) are extended into the hydraulic oil through the connecting assembly; The mixing mechanism (4) further comprises: A detection mechanism (406) and a fixing assembly, the detection mechanism (406) comprises an oil-water mixed detection module (602), and the oil-water mixed detection module (602) is used for detecting the dielectric constant change of the oil-water mixture to measure the water content.

2. The water power station governor oil pressure device with improved stability according to claim 1, characterized in that: An oil inlet (6), an oil outlet (7), an air inlet (8) and a viewing port (9) are arranged on the pressure tank (2), wherein two oil inlets (6) are arranged, the oil outlet (7) is arranged on the lower right side of the pressure tank (2), the two oil inlets (6) are arranged on the lower front side of the pressure tank (2), the oil inlet (6) is higher than the oil outlet (7), the viewing port (9) is arranged on the upper left side of the pressure tank (2), the air inlet (8) is arranged on the upper right side of the pressure tank (2), and the pump oil assembly (3) is provided with two groups, and the two groups of pump oil assemblies (3) correspond to the two oil inlets (6).

3. The water power station governor oil pressure device with improved stability according to claim 2, characterized in that: The pump oil assembly (3) comprises an oil pump (301), the lower side of the oil pump (301) is fixedly connected with the upper side of the bottom plate (1), the output end of the oil pump (301) is fixedly connected with a conveying pipe (302), the other end of the conveying pipe (302) is provided with a valve (303), the output end of the valve (303) is fixedly connected with the oil inlet (6), and the middle part of the conveying pipe (302) is provided with a flow detection module (304), and the output end of the oil pump (301) is in communication with the inside of the oil inlet (6) through the conveying pipe (302) and the valve (303).

4. The water power station governor oil pressure device with improved stability according to claim 3, characterized in that: The oil pump (301) and the flow detection module (304) are electrically connected with the control module, the start and stop of the oil pump (301) is controlled by the control module, and the flow detection module (304) is used for detecting the hydraulic oil flow and outputting to the control module.

5. The water power station governor oil pressure device with improved stability according to claim 4, characterized in that: The inner lower side of the pressure tank (2) is fixedly connected with a flow guide plate (10), the upper side of the flow guide plate (10) is a slope structure with high outer edge and low center, and the flow guide plate (10) is located on the lower side of the oil inlet (6) close to the inner end of the pressure tank (2).

6. The water power station governor oil pressure device with improved stability according to claim 5, characterized in that: The connecting assembly comprises a fixed pipe (401) which is a tubular structure inside the pressure tank (2), and the upper side of the fixed pipe (401) extends to the upper side outside the pressure tank (2), the outer wall of the fixed pipe (401) is fixedly connected with the inner wall of the pressure tank (2), and the upper side of the fixed pipe (401) is fixedly connected with a damping frame (402), the upper side of the damping frame (402) is fixedly connected with the outer wall of a mixing pump machine (403), and the output and input ends of the mixing pump machine (403) are respectively provided with a liquid discharge pipe (405) and a liquid inlet pipe (404).

7. The water power station governor oil pressure device with improved stability according to claim 6, characterized in that: The distal ends of the liquid inlet pipe (404) and the liquid discharge pipe (405) from the mixing pump machine (403) extend to the inside lower side of the fixed pipe (401) inside the pressure tank (2), and the fixed pipe (401) is located at the middle part of the pressure tank (2), the upper end of the liquid inlet pipe (404) is connected with the input end of the mixing pump machine (403), the lower end of the liquid inlet pipe (404) is higher than the lower end of the liquid discharge pipe (405), and the lower end of the liquid inlet pipe (404) is located on the upper side of the center part of the flow guide plate (10).

8. The water power station governor oil pressure device with improved stability according to claim 7, characterized in that: The fixed assembly comprises a fixed block (601), the inner wall of the fixed block (601) is fixedly connected with the outer wall of an oil-water mixing detection module (602), and the fixed assembly further comprises a flow guide hopper (603), the flow guide hopper (603) is a reverse funnel shape with a larger inner diameter at the lower side than at the upper side, the upper end of the flow guide hopper (603) is fixedly connected with the lower end of the liquid discharge pipe (405), and the flow guide hopper (603) is located on the upper side of the oil-water mixing detection module (602).

9. The water power station governor oil pressure device with improved stability according to claim 8, characterized in that: The inner wall of the flow guide hopper (603) is rotatably connected with a rotating block (604) through a bearing, the rotating block (604) is a spindle structure, the lower side of the outer wall of the rotating block (604) is fixedly connected with a fan blade (605), the lower end of the rotating block (604) is fixedly connected with a cleaning brush (606), and the lower side of the cleaning brush (606) is in contact with the outer wall of the oil-water mixing detection module (602).

10. A control method of a stability-improvable hydroelectric power station governor oil pressure device based on any one of claims 1 to 9, characterized by: The method comprises the following steps: Step 1: The pressure state in the pressure tank (2) is detected in real time by a pressure detection module (5), and data is transmitted to a control module, when the pressure value is lower than the set value, the control module sends an instruction to start the oil pump assembly (3) to enter the oil supplementing process; Step 2: The control module starts the oil pump (301), the hydraulic oil enters the oil inlet (6) through the delivery pipe (302) and the valve (303), and the flow detection module (304) monitors the oil flow in real time during the oil supplementing process, and returns the data to the control module for oil supplementing amount determination and safety control; Step 3: The hydraulic oil supplemented into the pressure tank (2) impacts the flow guide plate (10) to form up-down circulating flow, so that the hydraulic oil in the tank is sheared, disturbed and circulated in a large range, thereby eliminating the temperature stratification of the oil and improving the homogeneity of the oil. Step 4: When oil replenishment is completed, long-term shutdown or monitoring abnormalities, etc., the control module starts the mixing pump (403), which extracts oil through the liquid inlet pipe (404) and sprays it to the bottom of the fixed pipe (401) through the liquid outlet pipe (405), realizing forced mixing circulation inside the pressure tank (2); Step 5: During the mixing process, the oil-water detection module (602) at the end of the liquid outlet pipe (405) is used to monitor the dielectric constant of the oil and calculate the water content. The control module identifies whether the oil is layered based on the sudden change in water content at the beginning of mixing, and records the stable water content after mixing as the basis for subsequent health monitoring; Step 6: The control module continues to read the water content trend of the oil-water detection module (602) after the mixing period. If the water content continues to rise, it is determined that there may be external water infiltration, and a maintenance signal is sent. If the abnormality before mixing is restored after mixing, it is determined that there is local water accumulation, and the recorded event is automatically cleared: Step 7: When the mixing pump (403) is running, the liquid high-speed impact fan blade (605) drives the rotating block (604) and the cleaning brush (606) to rotate. The cleaning brush (606) contacts the probe surface of the oil-water detection module (602), realizing online cleaning of the probe; Step 8: After the mixing pump (403) stops, the oil flow is static, and the detection mechanism (406) returns to the stable water content measurement value. The control module diagnoses based on this value and historical data. If the abnormality persists, it confirms the fault and reports it. Otherwise, the control process ends.

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