Diesel engine belt pump fault monitoring method and device, ship and electronic equipment
By acquiring vibration data and system performance parameters of the diesel engine-driven pump, and combining multi-vibration measurement point collaborative verification, the lag problem of real-time fault monitoring of the diesel engine-driven pump was solved, achieving high-precision and high-reliability fault detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
- Filing Date
- 2026-04-02
- Publication Date
- 2026-06-12
Smart Images
Figure CN122191065A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of diesel engine design technology, specifically to fault monitoring methods, devices, ships, and electronic equipment for diesel engines with pumps. Background Technology
[0002] The motor-driven pump is a key component of a diesel engine, primarily responsible for fuel supply, lubrication of moving friction pairs, and cooling of heated parts. Its operational stability directly determines whether the diesel engine can operate normally, continuously, and safely. Motor-driven pumps are typically installed at the front end of the diesel engine, and due to space constraints, they are generally installed in an opposed configuration with cantilever support. During diesel engine operation, the motor-driven pump operates under harsh conditions of high speed, high load, and strong vibration, making it highly susceptible to mechanical failures such as bearing wear, pump shaft breakage, transmission gear wear, loose fasteners, and impeller scraping. Sudden and severe failures, especially pump shaft breakage and gear wear, are characterized by their instantaneous occurrence and rapid progression. If not detected promptly, they can quickly trigger a chain reaction of damage, ranging from pump failure to complete destruction of the diesel engine itself.
[0003] Currently, fault monitoring of diesel engine-driven pumps mainly relies on indirect judgment based on system operating parameters such as medium pressure, medium temperature, and flow rate. However, these parameters show only slight or no changes in the early stages of a fault. By the time these parameters become significantly abnormal, the pump is usually already severely damaged, making effective remedial measures difficult. Therefore, these parameters exhibit a significant lag in responding to sudden mechanical failures, making effective real-time fault monitoring of diesel engine-driven pumps impossible. Summary of the Invention
[0004] This invention provides a method, device, vessel, and electronic equipment for fault monitoring of diesel engine-driven pumps, aiming to solve the problem that related technologies cannot effectively monitor the real-time faults of diesel engine-driven pumps.
[0005] Firstly, a fault monitoring method for a diesel engine with a pump is provided, including: The vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump, are obtained; a reference amplitude is configured at each vibration measurement point. Determine the root mean square amplitude of the vibration data; For any first measuring point among different vibration measuring points, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, the trend of the change of the performance parameters of the detection system is observed. If an abnormal trend in system performance parameters is detected, an alarm message will be generated and output.
[0006] In some embodiments, detecting the changing trend of system performance parameters includes: The system detects the trend of changes in performance parameters in response to at least one second measuring point (excluding the first measuring point) being greater than the corresponding reference amplitude.
[0007] In some embodiments, abnormal trends in system performance parameters include: fluctuations in system performance parameters exceeding the corresponding preset normal fluctuation range.
[0008] In some embodiments, if the fluctuation of the root mean square amplitude at the first measurement point relative to the corresponding reference amplitude reaches a preset threshold, the method further includes: In response to the fact that the root mean square amplitude of each of the second measuring points other than the first measuring point is not greater than the corresponding reference amplitude, an alert message is output, indicating that the fault of the monitoring component corresponding to the first measuring point should be checked.
[0009] In some embodiments, the monitoring component includes a vibration sensor arranged at a first measuring point and / or a wiring harness connected to the vibration sensor.
[0010] In some embodiments, the above fault monitoring method further includes: When the root mean square amplitude of each vibration measuring point does not fluctuate relative to the corresponding reference amplitude and does not reach the preset threshold, the pump is continuously monitored for faults in combination with the changing trend of system performance parameters.
[0011] In some embodiments, different vibration measuring points include multiple of the bearing housing, mounting flange, and idler wheel.
[0012] In some embodiments, a vibration sensor is arranged at each vibration measuring point; acquiring vibration data of different vibration measuring points of the diesel engine's pump includes: acquiring vibration data collected by the vibration sensor arranged at each vibration measuring point.
[0013] Secondly, a fault monitoring device for a diesel engine with a pump is provided, comprising: The acquisition unit is configured to acquire the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump; wherein, each vibration measurement point is equipped with a reference amplitude; The element is configured to determine the root mean square amplitude of the vibration data. The detection unit is configured to detect the trend of changes in the system performance parameters when the fluctuation of the root mean square amplitude of the first measurement point relative to the corresponding reference amplitude reaches a preset threshold for any first measurement point among different vibration measurement points. The alarm unit is configured to generate and output alarm information if an abnormal trend in system performance parameters is detected.
[0014] Thirdly, a vessel is provided, including a diesel engine and a fault monitoring device as described in the second aspect.
[0015] Fourthly, an electronic device is provided, including a memory and a processor, wherein a computer program is stored on the memory, and when executed by the processor, the computer program implements the fault monitoring method as described in any implementation of the first aspect.
[0016] Fifthly, a computer-readable storage medium is provided having a computer program stored thereon, which is loaded by a processor to perform steps in the fault monitoring method as described in any implementation of the first aspect.
[0017] In summary, the solution provided in this application can acquire the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump. Then, it determines the root mean square amplitude of the vibration data. Next, for any first measurement point among these different vibration measurement points, if the fluctuation of the root mean square amplitude of the first measurement point relative to the corresponding reference amplitude reaches a preset threshold, it detects the changing trend of the system performance parameters. If an abnormal changing trend of the system performance parameters is detected, it generates and outputs alarm information. Therefore, this application adopts a comprehensive monitoring method combining motor-driven pump vibration data and system performance parameters. Leveraging the high sensitivity and real-time performance of vibration signals, combined with the accuracy and stability of system performance parameters, it achieves effective real-time fault monitoring of the diesel engine's motor-driven pump. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic flowchart of a fault monitoring method for a diesel engine with a pump provided in an embodiment of this application; Figure 2 This is another schematic flowchart of the fault monitoring method for a diesel engine with a pump provided in the embodiments of this application; Figure 3 This is another flowchart illustrating the fault monitoring method for a diesel engine with a pump provided in this application embodiment; Figure 4 This is a schematic diagram of the structure of the fault monitoring device for a diesel engine with a pump provided in the embodiments of this application; Figure 5 This is a structural schematic diagram of the ship provided in the embodiments of this application. Detailed Implementation
[0020] The technical solutions of the embodiments 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, and 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.
[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0022] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.
[0023] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more conditions or values may in practice be based on additional conditions or values beyond those stated.
[0024] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0025] As described in the background section, fault monitoring of diesel engine-mounted pumps primarily relies on indirect judgment using system operating parameters such as medium pressure, medium temperature, and flow rate. However, this method of judging the pump's operating status through changes in these parameters is inherently lagging. While the temperatures at measuring points such as the coolant inlet / outlet and lubricant inlet / outlet can reflect the pump's stability to some extent during stable diesel engine operation, the medium temperature changes slowly in the early stages of a sudden pump failure, exhibiting a significant lag. Pressure and flow rate parameters, while more synchronous and able to reflect the pump's status earlier than temperature, often indicate a problem when these parameters become abnormal under high engine speed and load conditions. Furthermore, pressure and flow rate parameters are significantly affected by system structure, leading to misjudgments and thus failing to provide substantial real-time monitoring. For example, one diesel engine-mounted pump fault diagnosis method filters the main engine lubricant inlet pressure and lubricant pump outlet pressure, using normal diesel engine operating data as a benchmark to determine if the pump is faulty. Due to the lag in system parameters, this method can only be used as a basis for diagnosing pump faults and cannot effectively monitor pump faults in real time.
[0026] Related technologies can also rely entirely on the collected vibration acceleration signals of the auxiliary pump itself. By processing and analyzing the signals, fault inflection points can be obtained. Effective vibration signals can reflect the true operating state of the pump, and feature analysis can be used to monitor pump faults in real time. However, in the complex and harsh environment of diesel engines with multiple vibration sources and multiple accessories, the accuracy of vibration sensors, as highly sensitive precision instruments, is greatly affected. Relying solely on vibration signals often leads to misjudgments, unnecessary time costs, and even affects testing or delivery schedules, causing greater losses. Multi-sensor deployment can improve this situation, but in practical applications, it is impossible to centrally deploy a large number of vibration sensors. Therefore, the above methods are not suitable for actual diesel engine application scenarios. For example, a fault monitoring method for a liquid rocket engine turbopump involves performing modal decomposition on the vibration acceleration signals of the pump itself in three directions, followed by Hilbert-Huang Transform (HHT), and constructing an EEMD (Ensemble Empirical Mode Decomposition)-HHT analysis model to obtain the energy abrupt change characteristics of the pump vibration acceleration signal as a basis for pump fault judgment. This method uses sensors to collect vibration signals from the turbine pump and relies entirely on vibration signals for fault monitoring. It is greatly affected by the environment and is difficult to apply in diesel engines.
[0027] In view of this, embodiments of this application provide a method, device, ship and electronic equipment for fault monitoring of diesel engine-driven pumps. By adopting a comprehensive monitoring method that combines vibration data of the engine-driven pump with system performance parameters, the high sensitivity and real-time performance of vibration signals, combined with the accuracy and stability of system performance parameters, can effectively monitor the faults of diesel engine-driven pumps in real time, thereby solving at least one of the above-mentioned technical problems.
[0028] In some embodiments, the fault monitoring method for diesel engine pumps provided in this application can be executed by a fault monitoring system or a fault monitoring device.
[0029] Figure 1 This is a schematic flowchart of a fault monitoring method for a diesel engine with a pump provided in an embodiment of this application. Figure 1 As shown, the fault monitoring method includes the following steps: S101: Obtain the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump; each vibration measurement point is equipped with a reference amplitude. S103: Determine the root mean square amplitude of the vibration data; S105: For any first measuring point among different vibration measuring points, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, detect the changing trend of the system performance parameters. S107: If an abnormal trend in system performance parameters is detected, an alarm message will be generated and output.
[0030] Figure 1 The corresponding embodiment provides a solution that can acquire vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump. Then, it determines the root mean square amplitude of the vibration data. Next, for any first measurement point among these different vibration measurement points, if the fluctuation of the root mean square amplitude of the first measurement point relative to the corresponding reference amplitude reaches a preset threshold, it detects the changing trend of the system performance parameters. If an abnormal changing trend of the system performance parameters is detected, it generates and outputs alarm information. Therefore, this application adopts a comprehensive monitoring method of motor-driven pump vibration data and system performance parameters. Leveraging the high sensitivity and real-time performance of vibration signals, combined with the accuracy and stability of system performance parameters, it achieves effective real-time fault monitoring of the diesel engine's motor-driven pump.
[0031] Steps S101 to S107 will be explained below.
[0032] In step S101, the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump, are acquired. Each vibration measurement point is equipped with a reference amplitude. It should be noted that the vibration data in this application can be referred to as vibration signals, such as vibration acceleration signals. When the diesel engine is in a stable operating state, the root mean square amplitude of each vibration signal should be dynamically stable, and this value can be used as the reference amplitude.
[0033] In the solution provided in this application embodiment, multiple key vibration measurement points can be determined in advance based on the structural layout characteristics of the engine-driven pump at the front end of the diesel engine, and vibration sensors can be installed thereon. Specifically, the vibration measurement point locations are selected with the engine-driven pump, such as a freshwater pump, seawater pump, lubricating oil pump, and fuel pump, as the target. The vibration sensors should be arranged according to the attenuation characteristics during the vibration transmission process of the fault characteristics and the fault type. For example, while being as close as possible to the target vibration source, they can be placed at the engine-driven pump bearing housing to monitor the operating status of the pump shaft and bearing; placed at the pump mounting flange to monitor the operating status of the pump gear end; and placed at the idler wheel at the front end of the diesel engine to monitor the operating status of the transmission gears, etc.
[0034] It should be understood that the aforementioned different vibration measuring points may include multiple points such as bearing housings, mounting flanges, and idler wheels. Furthermore, each of these different vibration measuring points is equipped with a vibration sensor.
[0035] In some embodiments, the vibration sensor in this application may include, but is not limited to, a unidirectional vibration acceleration sensor (such as a unidirectional 500g vibration acceleration sensor), where g is the unit of gravitational acceleration. In one example, the vibration sensor can convert the measured vibration acceleration signal into a voltage signal output with a range of 0V~5V, a sensitivity of 10mV / g, and a sampling frequency of 0.1Hz~10000Hz. This effectively captures the vibration characteristics of the diesel engine and pump over a wide frequency range, thus providing an accurate data basis for subsequent fault analysis and judgment. Here, V, mV, and Hz are units, representing volts, millivolts, and hertz, respectively.
[0036] When acquiring vibration data of the diesel engine's pump at different vibration measurement points, vibration data collected by vibration sensors arranged at each vibration measurement point can be obtained.
[0037] The current system performance parameters of the motorized pump may include at least one of the following: medium flow rate, inlet pressure, and inlet / outlet temperature. The sampling period for each system performance parameter may be, for example, once per second. For instance, sensors for collecting system performance parameters are installed on the inlet and outlet pipelines of the motorized pump, allowing for the acquisition of these parameters in real time.
[0038] In step S103, the root mean square (RMS) amplitude of the vibration data of the conveyor belt pump at each vibration measuring point is determined. The unit of the RMS amplitude is grams (g). For example, data processing software such as MATLAB (MATrixLABoratory) or LABVIEW (Laboratory Virtual Instrument Engineering Workbench) can be used to process the vibration data of the conveyor belt pump at each vibration measuring point to obtain the RMS amplitude. MATLAB is a high-level technical computing language and interactive environment, primarily used for algorithm development, data analysis, numerical computation, and visualization. LABVIEW is a graphical system design platform that uses a dataflow programming model.
[0039] In step S105, for any first measuring point among different vibration measuring points, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, the changing trend of the system performance parameters is detected.
[0040] The preset threshold can be a percentage fluctuation value used to quantify the severity of the vibration intensification. For example, the preset threshold could be any one of 19%, 20%, 21%, and 22%, or a value within an interval formed by any two of these percentages. The fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude can refer to the degree to which the root mean square amplitude of the first measuring point deviates from the reference amplitude of the first measuring point, usually expressed as a percentage. In one example, when determining the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude, for example, the difference between the root mean square amplitude and the reference amplitude can be determined, and the value of the fluctuation can be determined based on the ratio between the difference and the reference amplitude.
[0041] Because vibration signals are highly sensitive to mechanical faults such as broken shafts and tooth damage in the engine-driven pump, they can be detected in the early stages by observing the trend of vibration data changes. Therefore, when the root mean square amplitude of the first measuring point fluctuates relative to the corresponding reference amplitude to a preset threshold, it indicates that the engine-driven pump may have mechanical faults such as broken shafts or tooth damage. However, due to the complex and harsh environment in which diesel engines operate, vibration signals are often unreliable. Therefore, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches the preset threshold, it is necessary to further detect the changing trends of system performance parameters and conduct a comprehensive analysis in conjunction with the system performance parameters, thereby greatly improving the accuracy of fault diagnosis results.
[0042] When detecting the changing trends of system performance parameters, one can check whether the fluctuation values of the system performance parameters exceed the corresponding preset normal fluctuation range. If the fluctuation values of the system performance parameters exceed the corresponding preset normal fluctuation range, it can be determined that the system performance parameters have an abnormal changing trend. It should be understood that an abnormal changing trend of system performance parameters includes: the fluctuation values of the system performance parameters exceeding the corresponding preset normal fluctuation range.
[0043] In step S107, if an abnormal trend in system performance parameters is detected, an alarm message is generated and output. Afterwards, relevant personnel can use this alarm message to perform a shutdown inspection.
[0044] Figure 2 This is another schematic flowchart of the fault monitoring method for a diesel engine with a pump provided in this application embodiment. For example... Figure 2 As shown, the fault monitoring method includes the following steps: S201: Obtain the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump; wherein, each vibration measurement point is equipped with a reference amplitude; S203: Determine the root mean square amplitude of the vibration data; S205: For any first measuring point among different vibration measuring points, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, in response to the root mean square amplitude of at least one second measuring point other than the first measuring point being greater than the corresponding reference amplitude, the change trend of the system performance parameters is detected. S207: If an abnormal trend in system performance parameters is detected, an alarm message will be generated and output.
[0045] Figure 2 The corresponding embodiment provides a solution that, after acquiring vibration data and system performance parameters of the diesel engine's pump at different vibration measurement points and determining the root mean square amplitude of the vibration data, introduces a multi-vibration measurement point collaborative verification mechanism. For example, when the fluctuation of any first measurement point reaches a preset threshold, it is necessary to verify that the root mean square amplitude of at least one other second measurement point is also greater than the corresponding benchmark amplitude before triggering the detection of the system performance parameter change trend, and an alarm is triggered when it is confirmed that there is an abnormal change trend in the system performance parameters. Therefore, based on the comprehensive vibration data and system performance parameters, this application further improves the reliability of the initial triggering conditions through multi-point cross-verification within the vibration data, and can more effectively filter out false triggers caused by local interference. Thus, while ensuring high real-time performance and high sensitivity, it significantly enhances the accuracy and anti-interference capability of fault monitoring.
[0046] In some embodiments, if the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, a prompt message can also be output in response to the fact that the root mean square amplitudes of all second measuring points other than the first measuring point are not greater than the corresponding reference amplitude. The prompt message indicates the need to check the fault status of the monitoring component corresponding to the first measuring point. The monitoring component includes a vibration sensor arranged on the first measuring point and / or the wiring harness connected to the vibration sensor. This significantly reduces false alarms caused by single sensor failure, signal interference, or wiring problems, while providing maintenance personnel with a clear direction for troubleshooting. Therefore, in addition to improving the accuracy of fault monitoring, it further enhances the reliability and maintainability of fault monitoring.
[0047] In some embodiments, when the root mean square amplitude of each vibration measuring point does not fluctuate relative to the corresponding reference amplitude within a preset threshold, the pump can be continuously monitored for faults by combining the changing trends of system performance parameters. This compensates for monitoring blind spots that may result from relying solely on preset thresholds, enabling earlier and more comprehensive fault warnings through trend analysis of system performance parameters. This significantly improves the completeness and reliability of fault monitoring, avoiding missed fault reports due to delayed vibration signal responses.
[0048] Below, taking the above-mentioned different vibration measuring points as bearing housing, mounting flange, and idler wheel, with a preset threshold of 20% and the root mean square amplitude referred to as RMS amplitude, as an example, combined with... Figure 3 The following are examples illustrating the solutions provided in the embodiments of this application.
[0049] Figure 3 This is another schematic flowchart of the diesel engine-driven pump fault monitoring method provided in the embodiments of this application. For example... Figure 3 As shown, the vibration measuring points for the diesel engine's pump are the bearing housing, mounting flange, and idler wheel. The fault detection strategy for this diesel engine's pump is as follows: When the vibration is abnormal and the RMS amplitude fluctuation of the bearing housing, mounting flange and idler wheel is less than 20%, the trend of changes in system performance parameters such as medium flow rate, inlet pressure and / or inlet and outlet temperature should be continuously monitored. When the vibration is abnormal, and the RMS amplitude of any one of the measuring points in the bearing housing, mounting flange and idler wheel fluctuates by ≥20%, while the RMS amplitude of the other two measuring points does not change, check the sensor and wiring harness for problems. Replace the sensor as appropriate and continue to monitor the system parameters such as medium flow rate, inlet pressure and / or inlet and outlet temperature. When the vibration is abnormal, the RMS amplitude of any one of the measuring points in the bearing housing, mounting flange and idler wheel fluctuates by ≥20%, and the RMS amplitude of the other two measuring points increases synchronously, and the system performance parameters such as medium flow rate, inlet pressure and / or inlet and outlet temperature do not show any abnormal trend, then continue to monitor and stop the machine when appropriate to check the pump bearing / gear / idler wheel. When abnormal vibration occurs, and the RMS amplitude of any measuring point among the bearing housing, mounting flange, and idler wheel fluctuates by ≥20%, while the RMS amplitude of the other two measuring points increases synchronously, and system performance parameters such as medium flow rate, inlet pressure, and / or inlet / outlet temperature show abnormal changing trends, an alarm will be triggered, and the machine will be stopped for inspection of the pump bearing / gear / idler wheel.
[0050] Figure 4 This is a schematic diagram of the structure of the fault monitoring device for a diesel engine with a pump provided in an embodiment of this application. Figure 4 As shown, the fault monitoring device includes: The acquisition unit 401 is configured to acquire the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump; wherein, each vibration measurement point is equipped with a reference amplitude; Unit 402 is configured to determine the root mean square amplitude of the vibration data; The detection unit 403 is configured to detect the trend of changes in the system performance parameters when the fluctuation of the root mean square amplitude of the first measurement point relative to the corresponding reference amplitude reaches a preset threshold for any first measurement point among different vibration measurement points. Alarm unit 404 is configured to generate and output alarm information if an abnormal trend in system performance parameters is detected.
[0051] In some embodiments, the detection unit 403 is specifically configured to detect the changing trend of the system performance parameters in response to the root mean square amplitude of at least one second measuring point other than the first measuring point being greater than the corresponding reference amplitude.
[0052] In some embodiments, abnormal trends in system performance parameters include: fluctuations in system performance parameters exceeding the corresponding preset normal fluctuation range.
[0053] In some embodiments, the detection unit 403 is further configured to: when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, in response to the root mean square amplitude of each of the second measuring points other than the first measuring point not being greater than the corresponding reference amplitude, output a prompt message, the prompt message indicating to check the fault occurrence of the monitoring component corresponding to the first measuring point.
[0054] In some embodiments, the monitoring component includes a vibration sensor arranged at a first measuring point and / or a wiring harness connected to the vibration sensor.
[0055] In some embodiments, the detection unit 403 is further configured to: continuously monitor the pump for faults in combination with the changing trend of system performance parameters when the root mean square amplitude of each vibration measuring point relative to the corresponding reference amplitude does not reach a preset threshold.
[0056] In some embodiments, different vibration measuring points include multiple of the bearing housing, mounting flange, and idler wheel.
[0057] In some embodiments, a vibration sensor is arranged at each vibration measuring point; the acquisition unit 401 is specifically configured to acquire vibration data collected by the vibration sensor arranged at each vibration measuring point.
[0058] For an explanation of the above-mentioned fault monitoring device and the implementation methods and beneficial effects of each unit therein, please refer to the relevant descriptions above, which will not be repeated here.
[0059] Figure 5 This is a structural schematic diagram of the ship provided in the embodiments of this application, such as... Figure 5 As shown, the vessel includes a diesel engine and a fault monitoring device as described above.
[0060] This application also provides a fault monitoring system for a diesel engine with a pump, which includes the fault monitoring device as described above.
[0061] This application also provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, it implements the method of any of the above embodiments.
[0062] This application also provides a computer-readable storage medium storing a computer program thereon, which is loaded by a processor to execute the steps of any of the methods described in the above embodiments. In this application, the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.
[0063] This application also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the method of any of the above embodiments.
[0064] In summary, the solution provided in this application combines engine-driven pump vibration data with system performance parameters. By comprehensively analyzing the changes in vibration data and system performance parameters, it determines whether the engine-driven pump has experienced mechanical failures such as shaft breakage, gear wear, or bearing wear, and preliminarily locates the cause of the failure. Compared with related technologies, this application has the advantages of good timeliness and high accuracy, and is suitable for monitoring engine-driven pump failures in diesel engines.
[0065] The aforementioned method for monitoring the faults of the engine-driven pump in a diesel engine was thoroughly verified during the operation of a diesel engine. The faults of the engine-driven pump were successfully detected, and corresponding measures were taken in a timely manner to prevent the situation from deteriorating. The verification results are as follows.
[0066] Seawater pump malfunction 1: A diesel engine underwent a cyclic test. After being loaded to 110% operating conditions, abnormal front-end vibration data was observed. The relevant RMS amplitude fluctuations are shown in Table 1 below.
[0067] Table 1: Exemplary RMS amplitude fluctuations (110% operating condition)
[0068] As shown in Table 1, V1 represents the bearing housing location, V2 represents the mounting flange location, and V3 represents the idler wheel location. The RMS amplitude of the vibration data at measuring point V1 increased by 35% relative to the reference amplitude, exceeding the alarm value (e.g., 20%). Furthermore, the RMS amplitudes of the vibration data at V2 and V3 increased by 29% and 23%, respectively. Simultaneously, the seawater inlet pressure fluctuated, triggering an alarm. Subsequently, the inspection personnel discovered a leak in the seawater pump. Since measuring point V1 is located in the pump bearing housing, based on the above circumstances, it is preliminarily inferred that the abnormal vibration was likely caused by bearing damage.
[0069] Disassembly and inspection of the seawater pump revealed that the bearing cages at the impeller end and gear end were broken, the raceway had pits, and the bearings were damaged.
[0070] Freshwater pump malfunction 2: A diesel engine underwent a cyclic test. After being loaded to 100% operating conditions, abnormal front-end vibration data was observed. The relevant RMS amplitude fluctuations are shown in Table 2 below.
[0071] Table 2: Exemplary RMS amplitude fluctuations (100% operating condition)
[0072] As shown in Table 2, V1 represents the bearing housing position, V2 represents the mounting flange position, and V3 represents the idler wheel position. The RMS amplitude of the vibration data at measuring point V1 increased by 48% relative to the reference amplitude, exceeding the alarm value (e.g., 20%). The RMS amplitudes of the vibration data at V2 and V3 increased by 16% and 5% respectively, but the system performance parameters did not trigger any alarms or show any significant abnormal changes. After completing the cyclic test on site, a routine shutdown and disassembly inspection were performed.
[0073] Disassembly and inspection of the freshwater pump revealed that the impeller end and gear end bearing cages were intact and not broken. The impeller end bearing rotated smoothly and there were no visual abnormalities, but there were pits in the raceway of the gear end bearing.
[0074] The above verification results show that the fault detection method for diesel engine pumps proposed in this application is feasible and has significant effects in the verification process.
[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0076] The above provides a detailed description of a fault monitoring method, device, ship, and electronic equipment for a diesel engine with a pump, as provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for fault monitoring of a diesel engine with a pump, characterized in that, include: The vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump, are obtained; wherein, each vibration measurement point is equipped with a reference amplitude; Determine the root mean square amplitude of the vibration data; For any first measuring point among the different vibration measuring points, when the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, the changing trend of the system performance parameters is detected. If an abnormal trend in the system performance parameters is detected, an alarm message will be generated and output.
2. The fault monitoring method according to claim 1, characterized in that, Detecting the changing trends of the system performance parameters includes: In response to the fact that the root mean square amplitude of at least one second measuring point other than the first measuring point among the different vibration measuring points is greater than the corresponding reference amplitude, the changing trend of the system performance parameters is detected.
3. The fault monitoring method according to claim 2, characterized in that, The abnormal trend of the system performance parameters includes: the fluctuation value of the system performance parameters exceeds the corresponding preset normal fluctuation range.
4. The fault monitoring method according to claim 1, characterized in that, When the fluctuation of the root mean square amplitude of the first measuring point relative to the corresponding reference amplitude reaches a preset threshold, the method further includes: In response to the fact that the root mean square amplitude of each of the second measuring points other than the first measuring point is not greater than the corresponding reference amplitude, a prompt message is output, which indicates that the fault of the monitoring component corresponding to the first measuring point should be checked.
5. The fault monitoring method according to claim 4, characterized in that, The monitoring component includes a vibration sensor arranged at the first measuring point and / or a wiring harness connected to the vibration sensor.
6. The fault monitoring method according to claim 1, characterized in that, Also includes: If the fluctuation of the root mean square amplitude of each vibration measuring point relative to the corresponding reference amplitude does not reach the preset threshold, the pump is continuously monitored for faults in combination with the changing trend of the system performance parameters.
7. The fault monitoring method according to claim 1, characterized in that, The different vibration measuring points include multiple ones among the bearing housing, mounting flange, and idler wheel.
8. The fault monitoring method according to claim 1, characterized in that, A vibration sensor is arranged at each of the vibration measurement points; The acquisition of vibration data at different vibration measurement points of the diesel engine's pump includes: The vibration data collected by the vibration sensors arranged at each vibration measuring point is obtained.
9. A fault monitoring device for a diesel engine with a pump, characterized in that, include: The acquisition unit is configured to acquire the vibration data of the diesel engine's motor-driven pump at different vibration measurement points, as well as the current system performance parameters of the motor-driven pump; wherein, each of the different vibration measurement points is equipped with a reference amplitude; The determining unit is configured to determine the root mean square amplitude of the vibration data; The detection unit is configured to detect the trend of the system performance parameters when the fluctuation of the root mean square amplitude of the first measurement point relative to the corresponding reference amplitude reaches a preset threshold for any one of the different vibration measurement points. The alarm unit is configured to generate and output alarm information if an abnormal trend in the system performance parameters is detected.
10. A ship, characterized in that, It includes a diesel engine and the fault monitoring device as described in claim 9.
11. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, which, when executed by the processor, implements the fault monitoring method as described in any one of claims 1-8.
12. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the fault monitoring method according to any one of claims 1-8.