Oil basin oil supplementing method and device based on turbine state recognition

Abstract

The application discloses an oil basin oil supplementing method and device based on a water turbine state recognition, and the method comprises the following steps: recognizing the unit state, allowing the oil supplementing function when the unit is in the running state, and prohibiting the oil supplementing function when the unit is in the shutdown state; establishing an oil basin oil supplementing pipeline comprising a first pipeline and a second pipeline, the first pipeline connecting an oil tank and the oil basin to form an oil tank mode, the second pipeline connecting an oil depot and the oil basin to form a pipeline mode, and valves being arranged on the first pipeline and the second pipeline; setting the oil supplementing mode of the oil basin as the oil tank mode or the pipeline mode, monitoring the oil levels of the oil tank and the oil basin when the oil supplementing function is allowed; and when the oil level of the oil tank is normal or the oil basin is in the pipeline mode, supplementing oil to the oil basin through a gradient oil supplementing mode if the oil level of the oil basin is abnormal. The method adopts automatic gradient oil supplementing on the basis of unit state recognition and oil level monitoring, can control the oil supplementing speed according to the oil level, and can cope with the extreme situation of a sharp decrease of the oil level of the oil basin.

Description

Technical Field

[0001] This invention relates to the field of lubrication technology for turbine guide bearings, specifically to a method and apparatus for oil pan replenishment based on turbine condition identification. Background Technology

[0002] The oil pans on each guide shaft of the turbine serve as the lubricant and cooling medium for the guide bearings, playing a crucial role in the safe operation of the turbine. Due to factors such as oil spillage from the pans, the oil levels will inevitably drop slowly or rapidly. The traditional method of refilling involves monitoring the operating oil level in the pans. When the level drops to a certain value, an alarm sounds, and on-site maintenance personnel manually refill the pans by fetching oil from the oil depot using a refill container. While this method is effective for slow drops, in extreme cases of rapid drops in oil level, on-site maintenance personnel may not have enough time to refill, potentially leading to bearing failure and causing immeasurable damage to on-site safety. Summary of the Invention

[0003] The purpose of this invention is to address the problem that traditional oil replenishment methods for turbine oil pans cannot cope with extreme situations of rapid oil level drops. This invention provides an oil pan replenishment method and device based on turbine status identification. This method achieves automatic gradient oil replenishment based on unit status identification and oil level monitoring, which helps ensure the safe operation of turbine guide bearings.

[0004] This invention is achieved through the following technical solution:

[0005] In a first aspect, the present invention provides an oil pan replenishment method based on turbine condition identification, comprising:

[0006] The turbine shaft speed information is obtained, and the speed information is compared with the preset value to determine the unit status. When the unit is running, the lubrication function is allowed, and when the unit is stopped, the lubrication function is prohibited.

[0007] An oil pan replenishment pipeline is established, including a first pipeline and a second pipeline. The first pipeline connects the oil tank and the oil pan to form an oil tank configuration, and the second pipeline connects the oil depot and the oil pan to form a pipeline configuration. Valves are installed on the first pipeline and the second pipeline respectively to control the flow of oil in the pipeline.

[0008] Based on the hydropower station's situation, the initial refueling mode of the oil basin is set to either oil tank mode or pipeline mode. When the refueling function allows, the oil level in the oil tank and the oil basin are monitored.

[0009] When the oil level in the tank is normal or in pipeline mode, if the oil level in the oil pan is abnormal, calculate the difference between the current oil level in the oil pan and the lower limit of the normal oil level range, and dynamically adjust the valve opening according to the difference to add oil to the oil pan in a gradient refueling mode.

[0010] In the above scheme, by identifying the unit's status, refueling is permitted when the unit is running and prohibited when the unit is shut down. This ensures that all necessary refueling is done and avoids accidental refueling. Two refueling modes are set up: when using pipeline mode, the tank mode can serve as a backup. When refueling is permitted, the oil levels in the tank and the oil basin are monitored. If the oil level in the oil basin is abnormal when the oil level in the tank is normal or in pipeline mode, refueling is performed through a gradient refueling mode. Based on unit status identification and oil level monitoring, this method calculates the difference between the current oil level in the oil basin and the lower limit of the normal oil level range, and dynamically adjusts the valve opening according to the difference to achieve automatic gradient refueling. It can control the refueling speed according to the oil level, preventing overfilling due to delays caused by oil level changes. It can also increase the valve opening to replenish oil when the oil level drops sharply, effectively dealing with extreme situations where the oil level in the oil basin drops rapidly, and helping to ensure the safe operation of the turbine guide bearing.

[0011] In some embodiments, the gradient refueling mode is as follows: when the difference between the oil level and the lower limit of the normal oil level range is less than 20mm, the valve opening is 10% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 20mm and 50mm, the valve opening is 30% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 50mm and 100mm, the valve opening is 60% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is greater than 100mm, the valve opening is 100% to add oil to the oil pan until the oil level in the oil pan is normal.

[0012] In the above scheme, by setting up automatic gradient refueling, the valve opening can be adjusted according to the difference between the oil level and the lower limit of the normal oil level range to add oil to the oil pan. The refueling speed can be controlled according to the oil level to prevent overfilling due to delays caused by oil level changes. It can also increase the valve opening to add oil when the oil level drops sharply, thereby achieving precise refueling.

[0013] In some embodiments, the turbine is considered to be in operation when the turbine shaft speed is greater than 30% of the rated speed. Since the oil level in the oil pan remains essentially constant when the turbine shaft speed is low, it is not necessary to add oil to the oil pan at this time.

[0014] In some embodiments, the turbine shaft rotation speed is obtained by acquiring pulse signals from the shaft using a photoelectric sensor and calculating the frequency of the pulse signals.

[0015] In some embodiments, in tank mode, the tank volume is larger than the reservoir volume. This design ensures that the tank level meets the reservoir's normal level requirements, allowing time for refueling.

[0016] In some embodiments, in tank mode, when the fuel level in the tank is below the lower limit, an alarm signal is issued to remind maintenance personnel to add fuel to the tank.

[0017] Secondly, the present invention provides an oil pan refueling device based on turbine status identification, comprising a refueling pipeline, a microcontroller, a sensor unit, and an execution unit; the refueling pipeline includes a first pipeline and a second pipeline, the first pipeline connecting the oil tank and the oil pan, and the second pipeline connecting the oil reservoir and the oil pan; the sensor unit includes a photoelectric sensor, an oil tank level sensor, and an oil pan level sensor, the photoelectric sensor being used to detect the unit's operating status, and the oil tank level sensor and the oil pan level sensor being used to detect the oil tank level and the oil pan level, respectively; the execution unit includes a valve and an alarm, the valve being respectively installed on the first pipeline and the second pipeline, used to open the refueling when the oil pan level is lower than the normal value, and the alarm being used to sound an alarm when the oil tank level is lower than the normal value.

[0018] In the above scheme, by setting up two refueling pipelines, refueling of the oil pan can be achieved separately. By setting up photoelectric sensors to detect the unit's operating status, and by setting up oil tank level sensors and oil pan level sensors, the oil tank level and oil pan level can be detected respectively. The valves on the two refueling pipelines are controlled by a microcontroller to start refueling when the oil pan level is lower than the normal value. At the same time, when the oil tank level is low, an alarm will remind the operation and maintenance personnel to add oil to the tank. This device can realize automatic refueling of the oil pan to cope with extreme situations where the oil pan level drops sharply, and ensure the safe operation of the turbine guide bearing.

[0019] In some embodiments, the photoelectric sensor collects the pulse signal of the turbine shaft and inputs it to the microcontroller through the pulse recognition circuit. The microcontroller calculates the frequency of the pulse signal through its counting and timing functions, thereby obtaining the shaft rotation speed.

[0020] In some embodiments, the oil tank level sensor and the oil basin level sensor input the oil level signal to the microcontroller through a signal conditioning circuit and an analog signal acquisition circuit, and the microcontroller determines the current oil level and executes the response logic.

[0021] In some embodiments, the oil tank is positioned higher than the oil pan. This design allows for automatic refueling of the oil pan by utilizing the height difference when the pipeline valve is opened.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] 1. By identifying the unit's status, refueling is permitted when the unit is running and prohibited when the unit is shut down. This ensures that all necessary refueling is done and avoids accidental refueling. Two refueling modes are set up: when using pipeline mode, the tank mode can be used as a backup. When refueling is permitted, the oil levels in the tank and the oil basin are monitored. When the tank level is normal or in pipeline mode, if the oil basin level is abnormal, refueling is done to the oil basin through a gradient refueling mode. Based on unit status identification and oil level monitoring, this method calculates the difference between the current oil level in the oil basin and the lower limit of the normal oil level range, and dynamically adjusts the valve opening according to the difference to achieve automatic gradient refueling. It can control the refueling speed according to the oil level, prevent overfilling due to delays caused by oil level changes, and also increase the valve opening to replenish oil when the oil level drops sharply. This can effectively deal with extreme situations where the oil level in the oil basin drops sharply, and helps to ensure the safe operation of the turbine guide bearing.

[0024] 2. This device features two refueling pipelines, allowing for separate refueling of the oil pan. It utilizes photoelectric sensors to detect the unit's operating status, and oil tank and oil pan level sensors to detect the oil levels in both. A microcontroller controls the valves on both refueling pipelines, enabling refueling to begin when the oil pan level is below normal, and simultaneously triggering an alarm to alert maintenance personnel to add oil to the tank when the oil level is low. This allows for automatic, gradual refueling based on unit status identification and oil level monitoring. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0026] Figure 1 This is a flowchart of the oil pan replenishment method based on turbine status identification in this invention.

[0027] Figure 2 This is a working logic diagram of the oil pan replenishment method based on turbine status identification in this invention;

[0028] Figure 3 This is a schematic diagram of the pipeline of the oil pan replenishment device based on turbine status recognition in this invention.

[0029] Figure 4 This is a system diagram of the oil pan replenishment device based on turbine status recognition in this invention;

[0030] Figure 5This is a schematic diagram of the pulse recognition circuit in this invention;

[0031] Figure 6 This is a schematic diagram of the oil level monitoring circuit in this invention;

[0032] Figure 7 This is a schematic diagram of the valve and buzzer drive circuit in this invention.

[0033] The attached diagram shows the markings and corresponding component names:

[0034] 1-Oil tank, 2-Oil basin, 3-Oil storage tank, 4-First pipeline, 5-Second pipeline, 6-Valve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0040] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0041] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces), unless otherwise explicitly specified.

[0042] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] Example 1

[0045] Please refer to Figure 1 , Figure 2 and Figure 3 The oil pan replenishment method based on turbine condition identification provided in this application includes:

[0046] The turbine shaft speed information is obtained, and the speed information is compared with the preset value to determine the unit status. When the unit is running, the lubrication function is allowed, and when the unit is stopped, the lubrication function is prohibited.

[0047] An oil pan replenishment pipeline is established, including a first pipeline and a second pipeline. The first pipeline connects the oil tank and the oil pan to form an oil tank configuration, and the second pipeline connects the oil depot and the oil pan to form a pipeline configuration. Valves are installed on the first pipeline and the second pipeline respectively to control the flow of oil in the pipeline.

[0048] Based on the hydropower station's situation, the initial refueling mode of the oil basin is set to either oil tank mode or pipeline mode. When the refueling function allows, the oil level in the oil tank and the oil basin are monitored.

[0049] When the oil level in the tank is normal or in pipeline mode, if the oil level in the oil pan is abnormal, calculate the difference between the current oil level in the oil pan and the lower limit of the normal oil level range, and dynamically adjust the valve opening according to the difference to add oil to the oil pan in a gradient refueling mode.

[0050] When the unit is detected to be running, the oil refueling function is allowed, but no oil is added; conversely, when the unit is shut down, the oil refueling function is prohibited, and no oil is added under any circumstances. Compared to the ordinary method, oil refueling based on operating status can automatically identify the unit's operating status, ensuring that oil is added only when necessary and avoiding incorrect addition. In emergencies, if the oil level drops while the unit is running, oil can be added immediately to prevent bearing failure due to lack of lubrication.

[0051] When the refueling function is enabled, the fuel tank level is detected. If the fuel tank level is normal or in pipeline mode, the fuel pan level is monitored. Conversely, if the fuel tank level is low, an alarm signal is issued to remind maintenance personnel to add fuel to the upper tank. When the fuel tank level is normal or in pipeline mode, and the fuel pan level is decreasing, fuel is added to the fuel pan using a gradient refueling mode.

[0052] By identifying the unit's status, refueling is permitted when the unit is running and prohibited when the unit is shut down. This ensures that all necessary refueling is done and avoids accidental refueling. Two refueling modes are set up: when using pipeline mode, the tank mode can serve as a backup. When refueling is permitted, the oil levels in both the tank and the oil basin are monitored. If the oil level in the oil basin is abnormal when the tank level is normal or in pipeline mode, refueling is performed via a gradient refueling mode. Based on unit status identification and oil level monitoring, this method calculates the difference between the current oil level in the oil basin and the lower limit of the normal oil level range, and dynamically adjusts the valve opening according to the difference to achieve automatic gradient refueling. This allows for control of the refueling speed based on the oil level, preventing overfilling due to delays caused by oil level changes. It also allows for increased valve opening to replenish oil in case of an emergency drop in oil level, effectively addressing extreme situations such as a rapid drop in the oil basin level and helping to ensure the safe operation of the turbine guide bearing.

[0053] According to some embodiments of this application, the gradient refueling mode is as follows: when the difference between the oil level and the lower limit of the normal oil level range is less than 20mm, the valve opening is 10% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 20mm and 50mm, the valve opening is 30% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 50mm and 100mm, the valve opening is 60% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is greater than 100mm, the valve opening is 100% to add oil to the oil pan until the oil level in the oil pan is normal.

[0054] The above-described gradient refueling mode can be understood as follows: when the oil level is small compared to the lower limit of the normal oil level range, refueling is done with a small opening until the oil level in the basin is normal; when the oil level is large compared to the lower limit of the normal oil level range, refueling is done with a large opening until the oil level in the basin is normal. Using this gradient refueling mode allows for control of the refueling speed based on the oil level, preventing overfilling due to delays caused by oil level changes, and also enabling increased refueling by widening the opening when the oil level drops sharply.

[0055] By setting up automatic gradient refueling, the refueling speed can be controlled by adjusting the valve opening according to the difference between the oil level and the lower limit of the normal oil level range, thereby achieving precise refueling.

[0056] According to some embodiments of this application, the turbine is considered to be in operation when the turbine shaft speed is greater than 30% of the rated speed. Since the oil level in the oil pan remains basically unchanged when the turbine shaft speed is low, it is not necessary to add oil to the oil pan at this time.

[0057] According to some embodiments of this application, the rotational speed of the turbine shaft is obtained by acquiring the pulse signal of the shaft through a photoelectric sensor and calculating the frequency of the pulse signal.

[0058] According to some embodiments of this application, in tank mode, the tank volume is larger than the oil pan volume. This design ensures that the tank level meets the normal oil pan level requirements, allowing time for refueling. In tank mode, when the tank level falls below the lower limit, an alarm signal is issued to remind maintenance personnel to refuel the tank.

[0059] Example 2

[0060] Please refer to Figure 3 and Figure 4This application provides an oil pan refueling device based on turbine status identification, comprising a refueling pipeline, a microcontroller, a sensor unit, and an execution unit. The refueling pipeline includes a first pipeline 4 and a second pipeline 5. The first pipeline 4 connects an oil tank 1 and an oil pan 2, and the second pipeline 5 connects an oil depot 3 and an oil pan 2. The sensor unit includes a photoelectric sensor, an oil tank level sensor, and an oil pan level sensor. The photoelectric sensor is used to detect the unit's operating status, and the oil tank level sensor and the oil pan level sensor are used to detect the oil tank level and the oil pan level, respectively. The execution unit includes a valve 6 and an alarm. The valve 6 is respectively installed on the first pipeline 4 and the second pipeline 5, and is used to open the refueling when the oil pan level is lower than the normal value. The alarm is used to sound an alarm when the oil tank level is lower than the normal value.

[0061] The oil tank is a container for storing spare oil; the oil pan is a container for lubricating and cooling the guide shaft bearings during turbine operation; the microcontroller is the control core, completing signal acquisition and processing; the valve is located on the refueling pipeline, and the refueling speed is controlled by adjusting the valve opening. Photoelectric sensors, oil tank level sensors, oil pan level sensors, valves, and alarms are all electrically connected to the microcontroller to receive signals from each sensor and control the valves and alarms.

[0062] By setting up two types of refueling pipelines, refueling of the oil pan can be achieved separately. Photoelectric sensors are used to detect the unit's operating status, and oil tank level sensors and oil pan level sensors are used to detect the oil levels in the oil tank and oil pan respectively. A microcontroller controls the valves on the two refueling pipelines to start refueling when the oil pan level is below the normal value. At the same time, when the oil tank level is low, an alarm is triggered to remind maintenance personnel to add oil to the tank. This device can achieve automatic refueling of the oil pan to cope with extreme situations where the oil pan level drops sharply, ensuring the safe operation of the turbine guide bearing.

[0063] According to some embodiments of this application, the photoelectric sensor collects the pulse signal of the turbine shaft and inputs it to the microcontroller through a pulse recognition circuit. The microcontroller calculates the frequency of the pulse signal using its counting and timing functions, thus obtaining the shaft rotational speed. Specifically, the photoelectric sensor collects the pulse signal of the turbine shaft, which is then converted by an optocoupler and input to the microcontroller's interrupt port. The microcontroller calculates the frequency of the pulse signal, i.e., the rotational speed, using its counting and pulse functions. A detailed pulse recognition circuit can be found in [reference needed]. Figure 5 When the rotational speed is greater than 30% of the rated speed, the turbine is considered to be in operation.

[0064] According to some embodiments of this application, the fuel tank level sensor and the fuel pan level sensor input the fuel level signal to the microcontroller through a signal conditioning circuit and an analog signal acquisition circuit. The microcontroller then determines the current fuel level and executes response logic. Specifically, the monitoring signals from the fuel tank level sensor and the fuel pan level sensor are input to the microcontroller through a fuel level monitoring circuit. A specific fuel level monitoring circuit can be found in [reference needed]. Figure 6 The oil level monitoring circuit is divided into a signal conditioning circuit and an analog signal acquisition circuit. The analog signal acquisition circuit uses an 8-bit high-speed ADC conversion module, and its front-end signal conditioning circuit uses an LM393 comparator circuit to convert the current signals of the two oil levels into voltage signals. The voltage signals are then acquired by the ADC and input to the microcontroller. The microcontroller calculates the current oil level and executes the corresponding logic.

[0065] According to some embodiments of this application, the oil tank is positioned higher than the oil pan. This design allows for automatic refueling of the oil pan by utilizing the height difference when the pipeline valve is opened. It is understood that when installing the oil tank on-site, the bottom of the tank needs to be higher than the normal oil level in the oil pan so that the oil in the tank can automatically flow into the oil pan after the valve is opened.

[0066] According to some embodiments of this application, the valve is an electrically controlled valve, installed on the refueling pipeline, and its opening degree is controlled by a microcontroller to control the refueling speed. The alarm is a buzzer, which sounds when the fuel level in the tank is below the normal value to remind maintenance personnel to add fuel to the tank. The valve and buzzer drive module uses a ULN2003D chip; the specific drive circuit can be found in [reference needed]. Figure 7 .

[0067] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for oil pan replenishment based on turbine condition recognition, characterized in that, include: The turbine shaft speed information is obtained, and the speed information is compared with the preset value to determine the unit status. When the unit is running, the lubrication function is allowed, and when the unit is stopped, the lubrication function is prohibited. An oil pan replenishment pipeline is established, including a first pipeline and a second pipeline. The first pipeline connects the oil tank and the oil pan to form an oil tank configuration, and the second pipeline connects the oil depot and the oil pan to form a pipeline configuration. Valves are installed on the first pipeline and the second pipeline respectively to control the flow of oil in the pipeline. Based on the hydropower station's situation, the initial refueling mode of the oil basin is set to either oil tank mode or pipeline mode. When the refueling function allows, the oil level in the oil tank and the oil basin are monitored. When the oil level in the tank is normal or in pipeline mode, if the oil level in the oil pan is abnormal, calculate the difference between the current oil level in the oil pan and the lower limit of the normal oil level range, and dynamically adjust the valve opening according to the difference to add oil to the oil pan in a gradient refueling mode. The gradient refueling mode is as follows: when the difference between the oil level and the lower limit of the normal oil level range is less than 20mm, the valve opening is 10% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 20mm and 50mm, the valve opening is 30% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is between 50mm and 100mm, the valve opening is 60% to add oil to the oil pan until the oil level in the oil pan is normal; when the difference between the oil level and the lower limit of the normal oil level range is greater than 100mm, the valve opening is 100% to add oil to the oil pan until the oil level in the oil pan is normal.

2. The oil pan replenishment method based on turbine condition identification according to claim 1, characterized in that, When the turbine shaft speed is greater than 30% of the rated speed, the turbine is considered to be in operation.

3. The oil pan replenishment method based on turbine condition identification according to claim 2, characterized in that, The rotational speed of the turbine shaft is obtained by collecting pulse signals from the shaft using a photoelectric sensor and calculating the frequency of the pulse signals.

4. The oil pan replenishment method based on turbine condition identification according to claim 1, characterized in that, In fuel tank mode, the fuel tank volume must be larger than the fuel pan volume.

5. The oil pan replenishment method based on turbine condition identification according to claim 1, characterized in that, In fuel tank mode, when the fuel level in the tank is below the lower limit, an alarm signal will be issued to remind maintenance personnel to add fuel to the tank.

6. An apparatus for implementing the oil pan replenishment method according to any one of claims 1-5, characterized in that, The system includes a refueling pipeline, a microcontroller, a sensor unit, and an execution unit. The refueling pipeline includes a first pipeline and a second pipeline. The first pipeline connects the fuel tank and the fuel pan, and the second pipeline connects the fuel depot and the fuel pan. The sensor unit includes a photoelectric sensor, a fuel tank level sensor, and a fuel pan level sensor. The photoelectric sensor is used to detect the unit's operating status, and the fuel tank level sensor and the fuel pan level sensor are used to detect the fuel tank level and the fuel pan level, respectively. The execution unit includes a valve and an alarm. The valve is installed on the first pipeline and the second pipeline, respectively, and is used to open the refueling valve when the fuel pan level is lower than the normal value. The alarm is used to sound an alarm when the fuel tank level is lower than the normal value.

7. The apparatus according to claim 6, characterized in that, The photoelectric sensor collects the pulse signal of the turbine shaft and inputs it to the microcontroller through the pulse recognition circuit. The microcontroller calculates the frequency of the pulse signal through its counting and timing functions, thereby obtaining the shaft rotation speed.

8. The apparatus according to claim 6, characterized in that, The oil level sensor in the oil tank and the oil level sensor in the oil pan input the oil level signal to the microcontroller through the signal conditioning circuit and the analog signal acquisition circuit. The microcontroller then determines the current oil level and executes the response logic.

9. The apparatus according to claim 6, characterized in that, The oil tank should be positioned higher than the oil pan.

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