Control method, device, equipment, medium and program product for steam turbine interlocking stopping barring

Abstract

The invention provides a steam turbine interlocking parking barring control method, device and equipment, a medium and a program product, and relates to the technical field of steam turbines. The method comprises the following steps: acquiring a first real-time temperature of each bearing bush metal temperature measuring point in all bearing bush metal temperature measuring points and a second real-time temperature of a lubricating oil temperature measuring point; and on the basis of the first real-time temperature and the second real-time temperature of each bearing bush metal temperature measuring point, steam turbine interlocking parking barring control is carried out. According to the steam turbine interlocking barring control method, device and equipment, the medium and the program product provided by the invention, the steam turbine interlocking barring can be accurately controlled.

Description

Technical Field

[0001] This application relates to the field of steam turbine technology, and in particular to a control method, device, equipment, medium, and program product for a steam turbine interlocking shutdown car. Background Technology

[0002] The basic working principle of a traditional steam turbine generator set is as follows: high-temperature, high-pressure superheated steam from the power plant boiler enters the steam turbine, driving the turbine rotor to perform work. The steam turbine then drives a coaxial generator to convert thermal energy into electrical energy. The steam turbine rotor is the most important component in contact with the superheated steam during the energy conversion process, and it expands or contracts with temperature changes. When the rotor is heated unevenly, it will bend, and the unit will not be able to operate. Therefore, continuous turning of the turbine is necessary 24 hours before starting the steam turbine and until the temperature of the upper cylinder of the steam turbine drops to 100°C after shutdown. Turning the turbine involves using a turning motor to drive gears that mesh with the wheels on the steam turbine rotor, causing the rotor to rotate at a low speed to ensure uniform heating. The steam turbine and generator rotors are supported by four bearings (front and rear bearings of the turbine and front and rear bearings of the generator). A lubricating oil pump supplies oil to the bearings, which supports the rotor and cools the bearings. If the bearing temperature rises abnormally or the oil inlet is blocked or cut off, the turning operation must be stopped immediately to eliminate the fault. Otherwise, the steam turbine will be unable to operate if the bearings wear out, and the rotor will bend if it cannot be rotated for a long time, requiring the unit to undergo major overhaul.

[0003] Currently, during the turning gear operation of a steam turbine, the turbine will only be interlocked and shut down if the lubricating oil pump outlet pressure falls below a certain value. Taking a 60MW steam turbine as an example, if the lubricating oil pump outlet pressure drops below 0.04MPa, the lubricating oil will lose its function of supporting the rotor and cooling the bearings, triggering the turbine's interlock and shutting down. However, a lubricating oil pump outlet pressure below a certain value only indicates that the overall oil system pressure is too low to maintain turning gear operation; other situations may also occur that prevent turning gear operation. Summary of the Invention

[0004] This application provides a control method, device, equipment, medium, and program product for a steam turbine interlocking shutdown car, which solves the defects of insufficient logic in the existing steam turbine interlocking shutdown car and accurately controls the steam turbine interlocking shutdown car.

[0005] In a first aspect, this application provides a control method for interlocking shutdown of a steam turbine. The steam turbine includes a first bearing and a second bearing, with the first bearing positioned before the second bearing. The generator of the steam turbine includes a third bearing and a fourth bearing, with the third bearing positioned before the fourth bearing. At least one bearing metal temperature measuring point is installed on each of the first bearing, the second bearing, the third bearing, and the fourth bearing. A lubricating oil temperature measuring point is installed on the outlet manifold of the steam turbine's lubricating oil pump. The method includes: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points; The control of the steam turbine interlock shutdown machine is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0006] Optionally, the first bearing, the second bearing, the third bearing, and the fourth bearing are equipped with the same number of bearing metal temperature measuring points.

[0007] Optionally, the number of bearing metal temperature measuring points installed on the second bearing is greater than the number of bearing metal temperature measuring points installed on the first bearing, the number of bearing metal temperature measuring points installed on the first bearing is greater than the number of bearing metal temperature measuring points installed on the third bearing, and the number of bearing metal temperature measuring points installed on the third bearing is equal to the number of bearing metal temperature measuring points installed on the fourth bearing.

[0008] Optionally, the control of the steam turbine interlock shutdown car based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point includes: The temperature difference between the first real-time temperature and the first initial temperature at each bearing metal temperature measuring point is taken as the first temperature difference at each bearing metal temperature measuring point; the first initial temperature is the temperature at each bearing metal temperature measuring point when the rotating disc is first put into operation after the steam turbine is shut down. Based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point, calculate the second temperature difference of each bearing metal temperature measuring point; Based on the first temperature difference of each bearing metal temperature measuring point, the second temperature difference of each bearing metal temperature measuring point, and the second real-time temperature, the control of the steam turbine interlock shutdown car is performed.

[0009] Optionally, calculating the second temperature difference between each bearing metal temperature measuring point based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point includes: The difference between the first real-time temperature and the second real-time temperature at each bearing metal temperature measuring point is taken as the first difference value at each bearing metal temperature measuring point. The difference between the first initial temperature and the second initial temperature at each bearing metal temperature measuring point is taken as the second difference at each bearing metal temperature measuring point; the second initial temperature is the temperature of the lubricating oil temperature measuring point when the rotating disc engine is first put into operation after the steam turbine is shut down. The difference between the first difference and the second difference at each bearing metal temperature measuring point is taken as the second temperature difference at each bearing metal temperature measuring point.

[0010] Optionally, the control of the steam turbine interlock shutdown car based on the first temperature difference at each bearing metal temperature measuring point, the second temperature difference at each bearing metal temperature measuring point, and the second real-time temperature includes: If the first temperature difference at at least one target bearing metal temperature measuring point is greater than the first preset value, the second temperature difference is greater than the second preset value, and the second real-time temperature is greater than the third preset value, the first alarm and the second alarm are triggered, and the steam turbine interlocking shutdown car is controlled; the first alarm is a high temperature alarm for the target bearing metal temperature measuring point, and the second alarm is a steam turbine shutdown car alarm.

[0011] Secondly, this application also provides a control device for a steam turbine interlocking shutdown car. The steam turbine includes a first bearing and a second bearing, with the first bearing positioned before the second bearing. The generator of the steam turbine includes a third bearing and a fourth bearing, with the third bearing positioned before the fourth bearing. At least one bearing metal temperature measuring point is installed on each of the first bearing, the second bearing, the third bearing, and the fourth bearing. A lubricating oil temperature measuring point is installed on the outlet manifold of the steam turbine's lubricating oil pump. The device includes: The data acquisition module is used to acquire the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points. The control module is used to control the steam turbine interlock shutdown car based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0012] Thirdly, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect.

[0013] Fourthly, this application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect.

[0014] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0015] The control method, device, equipment, medium, and program product for the steam turbine interlocking turning gear provided in this application control the steam turbine interlocking turning gear by using the first real-time temperature of the bearing metal temperature measuring point of each bearing of the steam turbine and the second real-time temperature of the lubricating oil temperature measuring point of the steam turbine lubricating oil pump. This is more accurate than the prior art which only considers the lubricating oil pump outlet pressure to control the steam turbine interlocking turning gear. It can effectively avoid the situation where when at least one of the four bearings has an abnormally high temperature or the oil inlet is blocked and cut off, the lubricating oil pump outlet pressure will not decrease but instead increase, causing the existing interlocking control logic to fail, the turning gear to continue running, and the bearing with abnormally high temperature or cut-off oil to be worn out. This improves the logic of the steam turbine interlocking turning gear and accurately controls the steam turbine interlocking turning gear. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic flowchart of the control method for the steam turbine interlocking shutdown turning car provided in the embodiments of this application; Figure 2 This is a simplified diagram of the overall site layout for the control method of the steam turbine interlocking shutdown turntable provided in the embodiments of this application; Figure 3 This is a schematic diagram of the logic of triggering the steam turbine interlock shutdown car when the bearing temperature is high in the control method of the steam turbine interlock shutdown car provided in the embodiments of this application; Figure 4 This is a schematic diagram of the control device for the steam turbine interlocking shutdown turning car provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] This application provides a control method for a steam turbine interlocking shutdown mechanism. The steam turbine includes a first bearing and a second bearing, with the first bearing positioned before the second bearing. The steam turbine's generator includes a third bearing and a fourth bearing, with the third bearing positioned before the fourth bearing. Each of the first, second, third, and fourth bearings is equipped with at least one bearing metal temperature measuring point. A lubricating oil temperature measuring point is installed on the outlet manifold of the steam turbine's lubricating oil pump. The execution entity of this control method for the steam turbine interlocking shutdown mechanism can be an electronic device, such as a controller. The following description uses a controller as an example of how this method is executed. Figure 1 This is a flowchart illustrating the control method for the steam turbine interlocking shutdown turning gear provided in an embodiment of this application. (Refer to...) Figure 1 The method may include: Step 110: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points. Step 120: Based on the first and second real-time temperatures of each bearing metal temperature measuring point, control the steam turbine interlocking shutdown machine.

[0020] Specifically, the first bearing can be the front bearing of the steam turbine, the second bearing can be the rear bearing of the steam turbine, the third bearing can be the front bearing of the generator of the steam turbine, and the fourth bearing can be the rear bearing of the generator of the steam turbine. By real-time temperature monitoring of the first, second, third, and fourth bearings, the first real-time temperature of each bearing's metal temperature measuring point is obtained. The second real-time temperature is obtained by real-time monitoring of the lubricating oil temperature, and then the steam turbine interlock shutdown mechanism is controlled. For example, the steam turbine interlock shutdown mechanism can be initiated when the first real-time temperature and the second real-time temperature of a certain bearing's metal temperature measuring point are both too high.

[0021] The control method for the steam turbine interlocking turning gear provided in this application embodiment controls the steam turbine interlocking turning gear by using the first real-time temperature of the bearing metal temperature measuring point of each bearing of the steam turbine and the second real-time temperature of the lubricating oil temperature measuring point of the lubricating oil pump of the steam turbine. This method is more accurate than the prior art which only considers the lubricating oil pump outlet pressure to control the steam turbine interlocking turning gear. It can effectively avoid the situation where, when the temperature of at least one of the four bearings rises abnormally or the oil inlet is blocked and oil is cut off, the lubricating oil pump outlet pressure does not decrease but instead increases, causing the existing interlocking control logic to fail, the turning gear to continue running, and the bearing with abnormally high temperature or oil cut-off to be worn out. This method improves the logic of the steam turbine interlocking turning gear and accurately controls the steam turbine interlocking turning gear.

[0022] In some embodiments, the number of bearing metal temperature measuring points installed on the first bearing, second bearing, third bearing and fourth bearing is the same.

[0023] The number of bearing metal temperature measuring points installed on the first, second, third, and fourth bearings can be one or more. Figure 2 This is a simplified diagram of the overall site layout for the control method of the steam turbine interlocking shutdown turntable provided in the embodiments of this application. Figure 2 This example illustrates a scenario where two bearing metal temperature measuring points are installed on each bearing bush. Specifically, the two bearing metal temperature measuring points for the first bearing bush are numbered 1:1 bearing metal temperature -1 and 2:1 bearing metal temperature -2; for the second bearing bush, they are numbered 3:2 bearing metal temperature -1 and 4:2 bearing metal temperature -2; for the third bearing bush, they are numbered 5:3 bearing metal temperature -1 and 6:3 bearing metal temperature -2; and for the fourth bearing bush, they are numbered 7:4 bearing metal temperature -1 and 8:4 bearing metal temperature -2. The lubricating oil temperature measuring point is numbered 9. The generator of the steam turbine is numbered 10 and installed on the rotor side of the steam turbine. All bearing metal temperature measuring points and lubricating oil temperature measuring points are remote measuring points, and the measuring data can be uploaded to the main control room operating system. Furthermore, during the turning gear operation, the generator gear of the 10 steam turbine meshes with the steam turbine rotor gear, and the generator of the steam turbine drives the steam turbine rotor to rotate at a low speed. The lubricating oil pump supplies lubricating oil to the four bearings.

[0024] Furthermore, in some embodiments, the number of bearing metal temperature measuring points installed on the second bearing is greater than the number of bearing metal temperature measuring points installed on the first bearing, the number of bearing metal temperature measuring points installed on the first bearing is greater than the number of bearing metal temperature measuring points installed on the third bearing, and the number of bearing metal temperature measuring points installed on the third bearing is equal to the number of bearing metal temperature measuring points installed on the fourth bearing.

[0025] Based on the varying weights and probabilities of overheating in each bearing bush, a greater number of bearing metal temperature measuring points can be installed on bearing bushes more prone to overheating. Specifically, the second bearing bush can have the largest number of measuring points installed, the first bearing bush a larger number, and the third and fourth bearing bushes the same number, but fewer than the first bearing bush, to ensure accurate temperature monitoring of each bearing bush.

[0026] The control method for the steam turbine interlock shutdown carriage provided in this application embodiment can accurately detect the temperature of each bearing by installing one or more bearing metal temperature measuring points of the same or different number on the first bearing, second bearing, third bearing and fourth bearing, thereby accurately controlling the steam turbine interlock shutdown carriage.

[0027] In some embodiments, the control of the steam turbine interlocking shutdown car is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point, including: using the temperature difference between the first real-time temperature and the first initial temperature of each bearing metal temperature measuring point as the first temperature difference of each bearing metal temperature measuring point; the first initial temperature is the temperature of each bearing metal temperature measuring point when the steam turbine is first put into operation after shutdown; calculating the second temperature difference of each bearing metal temperature measuring point based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point; and performing the control of the steam turbine interlocking shutdown car based on the first temperature difference of each bearing metal temperature measuring point, the second temperature difference of each bearing metal temperature measuring point, and the second real-time temperature.

[0028] Further, in some embodiments, the second temperature difference of each bearing metal temperature measuring point is calculated based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point, including: taking the difference between the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point as the first difference of each bearing metal temperature measuring point; taking the difference between the first initial temperature and the second initial temperature of each bearing metal temperature measuring point as the second difference of each bearing metal temperature measuring point; the second initial temperature is the temperature of the lubricating oil temperature measuring point when the rotating gear is first engaged after the steam turbine is shut down; and taking the difference between the first difference and the second difference of each bearing metal temperature measuring point as the second temperature difference of each bearing metal temperature measuring point.

[0029] Furthermore, in some embodiments, the control of the steam turbine interlocking shutdown vehicle is performed based on the first temperature difference of each bearing metal temperature measuring point, the second temperature difference of each bearing metal temperature measuring point, and the second real-time temperature. This includes: if the first temperature difference of at least one target bearing metal temperature measuring point is greater than a first preset value, the second temperature difference is greater than a second preset value, and the second real-time temperature is greater than a third preset value, a first alarm and a second alarm are triggered, and the steam turbine interlocking shutdown vehicle is controlled; the first alarm is a high temperature alarm for the target bearing metal temperature measuring point, and the second alarm is a steam turbine shutdown vehicle alarm.

[0030] Specifically, taking the installation of two bearing metal temperature measuring points on each bearing as an example, with a first preset value of 3℃, a second preset value of 5℃, and a third preset value of 45℃, if the first real-time temperature of the target bearing metal temperature measuring point (e.g., bearing metal temperature -1) minus the first initial temperature of the target bearing metal temperature measuring point at the time of the first commissioning of the steam turbine after shutdown is greater than 3℃, and the second real-time temperature difference between the target bearing metal temperature measuring point and the lubricating oil temperature measuring point minus the second initial temperature difference between the target bearing metal temperature measuring point and the lubricating oil temperature measuring point at the time of the first commissioning of the steam turbine after shutdown is greater than 5℃, and the second real-time temperature of the lubricating oil temperature measuring point is greater than 45℃, then the first and second alarms are triggered, and the steam turbine is interlocked to stop the commissioning. The first alarm is a high temperature alarm for bearing metal temperature -1, and the second alarm is a steam turbine commissioning alarm. The first and second alarms can be used to prompt personnel to check and handle the corresponding bearing fault. It should be noted that the three conditions of the first temperature difference being greater than the first preset value, the second temperature difference being greater than the second preset value, and the second real-time temperature being greater than the third preset value do not have to be triggered simultaneously. As long as the maximum interval between the three triggering conditions is within the preset time, they are considered to be satisfied.

[0031] Since the turning gear speed of the steam turbine is below 10 rpm, far lower than the operating speed of 3000 rpm, and the steam turbine does not have high-temperature and high-pressure steam inlet, analysis of the steam turbine operating data shows that the bearing metal temperature and lubricating oil temperature will gradually decrease, and the bearing temperature will gradually approach the lubricating oil temperature. It is concluded that the first real-time temperature of the bearing metal temperature measuring point minus the first initial temperature of the bearing metal temperature measuring point when the turning gear is first engaged after the steam turbine is shut down is greater than 3℃. The second temperature difference between the first real-time temperature of the bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point minus the second initial temperature difference between the first initial temperature of the bearing metal temperature measuring point when the turning gear is first engaged after the steam turbine is shut down and the second initial temperature of the lubricating oil temperature measuring point when the turning gear is first engaged after the steam turbine is shut down is greater than 5℃, which is the limit temperature of the steam turbine during turning gear. Combined with the fact that the second real-time temperature of the lubricating oil temperature measuring point is higher than 45℃, it can be judged that the temperature of the bearing metal temperature measuring point is high. The steam turbine shutdown alarm logic is triggered when at least one of the eight bearing metal temperature measuring points meets the high temperature alarm, thus triggering the steam turbine shutdown alarm and controlling the steam turbine interlock shutdown car.

[0032] The control method for the steam turbine interlocking turning gear provided in this application embodiment obtains the first temperature difference and the second temperature difference of each bearing metal temperature measuring point. When the first temperature difference of at least one target bearing metal temperature measuring point is greater than a first preset value, the second temperature difference is greater than a second preset value, and the second real-time temperature is greater than a third preset value, a first alarm and a second alarm are triggered, and the steam turbine interlocking turning gear is controlled to stop. This method is more accurate than the prior art which only considers the lubricating oil pump outlet pressure to control the steam turbine interlocking turning gear. It can effectively avoid the situation where when at least one of the four bearings has an abnormally high temperature or the oil inlet is blocked and cut off, the lubricating oil pump outlet pressure will not decrease but instead increase, causing the existing interlocking control logic to fail, the turning gear to continue running, and the bearing with an abnormally high temperature or cut-off oil to be worn out. This method improves the logic of the steam turbine interlocking turning gear and accurately controls the steam turbine interlocking turning gear.

[0033] Based on the description of the above embodiments, Figure 3 This is a schematic diagram illustrating the logic of the steam turbine interlock shutdown control method provided in this application, where high bearing temperature triggers the steam turbine interlock shutdown. The DQ logic module is a bad pixel detection module, the SUB logic module is a subtraction calculation module, the GE logic module is a comparison module where the value exceeds a set value, and FALSE indicates a bad pixel output.

[0034] Figure 3 Taking the 1-bearing metal temperature -1 as an example, when the first real-time temperature of 1-bearing metal temperature -1 minus the first initial temperature at the time of the first commissioning after the 1-bearing metal temperature -1 shutdown is greater than 3℃, a signal indicating a temperature deviation greater than 3℃ for 1-bearing metal temperature -1 is issued; when the second difference between the first real-time temperature of 1-bearing metal temperature -1 and the second real-time temperature of the lubricating oil temperature measuring point minus the second difference between the first initial temperature at the time of the first commissioning after the 1-bearing metal temperature -1 shutdown and the second initial temperature at the time of the first commissioning after the lubricating oil temperature measuring point shutdown is greater than 5℃, a signal indicating a temperature deviation greater than 5℃ between 1-bearing metal temperature -1 and the lubricating oil temperature is issued; when the second real-time temperature of the lubricating oil temperature measuring point is greater than 45℃, a high lubricating oil temperature signal is issued. Simultaneously issuing these three signals (AND gate logic relationship) triggers a high temperature alarm for 1-bearing metal temperature -1. Eight alarm signals are generated, including 1 bearing metal temperature -1 high, 1 bearing metal temperature -2 high, ... 4 bearing metal temperature -1 high, 4 bearing metal temperature -2 high. At least one alarm signal is issued (OR gate logic relationship), triggering the steam turbine interlock shutdown alarm for high bearing metal temperature, and the turning gear motor automatically stops running.

[0035] Furthermore, the signal indicating a temperature deviation greater than 3°C for bearing metal temperature -1 is generated by comparing the calculated deviation value of bearing metal temperature -1 with a set value of 3 via the GE logic module. A signal is issued when the calculated value is higher than 3, and not when it is lower than 3. The calculated deviation value between bearing metal temperature -1 and lubricating oil temperature is calculated by the difference between the real-time output value of bearing metal temperature -1 and the temperature value at the first time the bearing metal temperature -1 is switched on after shutdown via the SUB logic module. The real-time output value of bearing metal temperature -1 is determined by judging the real-time input value of bearing metal temperature -1 against the "DQ=FALSE" bad point using the logic module. If it is determined not to be a bad point, the output value is output; if it is determined to be a bad point, "FALSE" (bad point) is output, and the measurement point is blocked.

[0036] Furthermore, the signal indicating a deviation greater than 5°C between the 1-bearing metal temperature -1 and the lubricating oil temperature is generated by comparing the calculated deviation value of the 1-bearing metal temperature -1 and the set value of 5 through the GE logic module. A signal is issued when the calculated value is higher than 5, and not when it is lower than 5. The calculated deviation value between the 1-bearing metal temperature -1 and the lubricating oil temperature is the difference calculated by the SUB logic module between the calculated real-time temperature difference between the 1-bearing metal temperature -1 and the real-time lubricating oil temperature difference after the 1-bearing metal temperature -1 is stopped and the temperature difference between the lubricating oil temperature at the first time the lubricating oil is started after the lubricating oil is stopped. The calculated real-time temperature difference between the 1-bearing metal temperature -1 and the real-time lubricating oil temperature is the difference calculated by the SUB logic module between the real-time output value of the 1-bearing metal temperature -1 and the real-time output value of the lubricating oil temperature. The output value is determined by the real-time input value of bearing metal temperature -1 and the bad point detection of bearing metal temperature -1DQ=FALSE through the DQ logic module. If it is not determined to be a bad point, the output value is output; if it is determined to be a bad point, FALSE (bad point) is output, and the measurement point is disabled. The real-time output value of lubricating oil temperature is determined by the real-time input value of lubricating oil temperature and the bad point detection of lubricating oil temperature -1DQ=FALSE through the DQ logic module. If it is not determined to be a bad point, the output value is output; if it is determined to be a bad point, FALSE (bad point) is output, and the measurement point is disabled. The calculated value of the temperature difference between bearing metal temperature -1 when the machine is stopped and the temperature difference between lubricating oil temperature when the machine is stopped and the temperature difference between lubricating oil temperature when the machine is stopped and the temperature difference between lubricating oil temperature when the machine is stopped and the temperature difference between lubricating oil temperature when the machine is stopped and the temperature difference between lubricating oil temperature when the machine is stopped is calculated by the SUB logic module.

[0037] Furthermore, the high lubricating oil temperature signal is generated by comparing the real-time output value of the lubricating oil temperature with a set value of 45 via the GE logic module. When the calculated value is higher than 45, the signal is issued; when it is lower than 45, the signal is not issued. The real-time output value of the lubricating oil temperature is generated by comparing the real-time input value of the lubricating oil temperature with the lubricating oil temperature measuring point DQ=FALSE (bad point) via the DQ logic module. When it is determined that it is not a bad point, the output value is output; when it is determined to be a bad point, FALSE (bad point) is output, and this measuring point is blocked.

[0038] Furthermore, the high temperature alarm for bearing metal temperature -1 is generated simultaneously through the AND logic module by three signals: the real-time temperature of bearing metal temperature -1 minus the temperature deviation at the first turning gear operation after bearing metal temperature -1 shutdown exceeding 3℃; the difference between the real-time temperature of bearing metal temperature -1 and the real-time temperature of lubricating oil minus the temperature difference between the first turning gear operation after bearing metal temperature -1 shutdown and the first turning gear operation after lubricating oil shutdown exceeding 5℃; and the high real-time temperature of lubricating oil. The high bearing metal temperature steam turbine interlock shutdown turning gear alarm, which automatically stops the turning gear motor, is generated through the OR logic module by eight alarm signals: high temperature of bearing metal temperature -1, high temperature of bearing metal temperature -2... high temperature of bearing metal temperature -1, high temperature of bearing metal temperature -2, etc., generated through the OR logic module. The AND logic module is an AND gate module, and the OR logic module is an OR gate module.

[0039] By installing two bearing temperature measuring points on each bearing, firstly, it is easier to measure and determine the true temperature of the same bearing metal; secondly, the logic includes a fault detection mechanism. When a fault is detected, the logic will block the fault and issue a corresponding alarm to remind the on-duty personnel to handle the fault. At this time, there is still one measuring point on the bearing that is being monitored normally.

[0040] The control device for the steam turbine interlocking shutdown car provided in this application is described below. The control device for the steam turbine interlocking shutdown car described below can be referred to in correspondence with the control method for the steam turbine interlocking shutdown car described above.

[0041] Figure 4 This is a schematic diagram of the control device for the steam turbine interlocking shutdown turntable provided in an embodiment of this application. (Refer to...) Figure 4 The control device for interlocking shutdown of a steam turbine provided in this application embodiment includes a steam turbine comprising a first bearing and a second bearing, the first bearing being positioned before the second bearing. The generator of the steam turbine includes a third bearing and a fourth bearing, the third bearing being positioned before the fourth bearing. At least one bearing metal temperature measuring point is installed on each of the first, second, third, and fourth bearings. A lubricating oil temperature measuring point is installed on the outlet manifold of the steam turbine's lubricating oil pump. The device includes: The acquisition module 410 is used to acquire the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points. The control module 420 is used to control the steam turbine interlocking shutdown car based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0042] The control device for the steam turbine interlocking turning gear provided in this application embodiment controls the steam turbine interlocking turning gear by measuring the first real-time temperature of the metal temperature of each bearing of the steam turbine and the second real-time temperature of the lubricating oil temperature of the lubricating oil pump of the steam turbine. This is more accurate than the prior art which only considers the lubricating oil pump outlet pressure to control the steam turbine interlocking turning gear. It can effectively avoid the situation where, when the temperature of at least one of the four bearings rises abnormally or the oil inlet is blocked and oil is cut off, the outlet pressure of the lubricating oil pump does not decrease but rises instead, causing the existing interlocking control logic to fail, the turning gear to continue running, and the bearing with abnormally high temperature or oil cut-off to be worn out. This improves the logic of the steam turbine interlocking turning gear and accurately controls the steam turbine interlocking turning gear.

[0043] Specifically, the control device for the steam turbine interlocking shutdown car provided in this application embodiment can realize all the method steps implemented by the method embodiment with the controller as the execution subject, and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0044] Figure 5 This is a schematic diagram of the structure of the electronic device provided in an embodiment of this application. For example... Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute control methods for the steam turbine interlocking shutdown of the turning gear, such as including: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points; The control of the steam turbine interlock shutdown machine is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0045] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0046] On the other hand, this application also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the control method for the steam turbine interlocking shutdown turning gear provided by the above methods, including, for example: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points; The control of the steam turbine interlock shutdown machine is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0047] Furthermore, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to perform the steps of the control method for the steam turbine interlocking shutdown turning gear provided by the above methods, for example including: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points; The control of the steam turbine interlock shutdown machine is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

[0048] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0049] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0050] It should also be noted that in the embodiments of this application, the terms "first," "second," etc., are used to distinguish similar objects, and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, and the number of objects is not limited. For example, the first object can be one or more.

[0051] In this application embodiment, the term "and / or" describes the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In this application's embodiments, "determine B based on A" means that factor A must be considered when determining B. It is not limited to "B can be determined based solely on A," but should also include: "determine B based on A and C," "determine B based on A, C, and E," "determine C based on A, and further determine B based on C," etc. Additionally, it can include using A as a condition for determining B, for example, "when A meets the first condition, determine B using the first method"; another example, "when A meets the second condition, determine B," etc.; another example, "when A meets the third condition, determine B based on the first parameter," etc. Of course, it can also be a condition where A is a factor in determining B, for example, "when A meets the first condition, determine C using the first method, and further determine B based on C," etc.

[0053] In the embodiments of this application, the term "multiple" refers to two or more, and other quantifiers are similar.

[0054] In the embodiments of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In this application embodiment, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application embodiment based on the specific circumstances.

[0056] In this embodiment of the application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A control method for interlocking shutdown of a steam turbine turning gear, characterized in that, The steam turbine includes a first bearing and a second bearing, with the first bearing positioned before the second bearing. The generator of the steam turbine includes a third bearing and a fourth bearing, with the third bearing positioned before the fourth bearing. At least one bearing metal temperature measuring point is installed on each of the first, second, third, and fourth bearings. A lubricating oil temperature measuring point is installed on the outlet manifold of the steam turbine's lubricating oil pump. The method includes: Obtain the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points; The control of the steam turbine interlock shutdown machine is performed based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

2. The control method for interlocking shutdown of the turning gear in a steam turbine according to claim 1, characterized in that, The first bearing, the second bearing, the third bearing, and the fourth bearing have the same number of bearing metal temperature measuring points.

3. The control method for interlocking shutdown of the turning gear in a steam turbine according to claim 1, characterized in that, The number of bearing metal temperature measuring points installed on the second bearing is greater than the number of bearing metal temperature measuring points installed on the first bearing, the number of bearing metal temperature measuring points installed on the first bearing is greater than the number of bearing metal temperature measuring points installed on the third bearing, and the number of bearing metal temperature measuring points installed on the third bearing is equal to the number of bearing metal temperature measuring points installed on the fourth bearing.

4. The control method for interlocking shutdown of the turning gear in a steam turbine according to claim 1, characterized in that, The control of the steam turbine interlock shutdown car based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point includes: The temperature difference between the first real-time temperature and the first initial temperature at each bearing metal temperature measuring point is taken as the first temperature difference at each bearing metal temperature measuring point; the first initial temperature is the temperature at each bearing metal temperature measuring point when the rotating disc is first put into operation after the steam turbine is shut down. Based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point, calculate the second temperature difference of each bearing metal temperature measuring point; Based on the first temperature difference of each bearing metal temperature measuring point, the second temperature difference of each bearing metal temperature measuring point, and the second real-time temperature, the control of the steam turbine interlock shutdown car is performed.

5. The control method for interlocking shutdown of the steam turbine turning gear according to claim 4, characterized in that, The calculation of the second temperature difference at each bearing metal temperature measuring point based on the first real-time temperature and the second real-time temperature at each bearing metal temperature measuring point includes: The difference between the first real-time temperature and the second real-time temperature at each bearing metal temperature measuring point is taken as the first difference value at each bearing metal temperature measuring point. The difference between the first initial temperature and the second initial temperature at each bearing metal temperature measuring point is taken as the second difference at each bearing metal temperature measuring point; the second initial temperature is the temperature of the lubricating oil temperature measuring point when the rotating disc engine is first put into operation after the steam turbine is shut down. The difference between the first difference and the second difference at each bearing metal temperature measuring point is taken as the second temperature difference at each bearing metal temperature measuring point.

6. The control method for interlocking shutdown of the turning gear in a steam turbine according to claim 4, characterized in that, The control of the steam turbine interlock shutdown car based on the first temperature difference of each bearing metal temperature measuring point, the second temperature difference of each bearing metal temperature measuring point, and the second real-time temperature includes: If the first temperature difference at at least one target bearing metal temperature measuring point is greater than the first preset value, the second temperature difference is greater than the second preset value, and the second real-time temperature is greater than the third preset value, the first alarm and the second alarm are triggered, and the steam turbine interlocking shutdown car is controlled; the first alarm is a high temperature alarm for the target bearing metal temperature measuring point, and the second alarm is a steam turbine shutdown car alarm.

7. A control device for interlocking shutdown of a steam turbine turning gear, characterized in that, The steam turbine includes a first bearing and a second bearing, with the first bearing positioned before the second bearing. The generator of the steam turbine includes a third bearing and a fourth bearing, with the third bearing positioned before the fourth bearing. Each of the first, second, third, and fourth bearings is equipped with at least one bearing metal temperature measuring point. The outlet manifold of the steam turbine's lubricating oil pump is equipped with a lubricating oil temperature measuring point. The device includes: The data acquisition module is used to acquire the first real-time temperature of each bearing metal temperature measuring point and the second real-time temperature of the lubricating oil temperature measuring point among all bearing metal temperature measuring points. The control module is used to control the steam turbine interlock shutdown car based on the first real-time temperature and the second real-time temperature of each bearing metal temperature measuring point.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method for the steam turbine interlocking shutdown car as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method for the steam turbine interlocking shutdown car as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for the steam turbine interlocking shutdown car as described in any one of claims 1 to 6.

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