A centrifugal fan fault monitoring method, electronic device and storage medium

Abstract

The present invention relates to the technical field of centrifugal fans, and specifically to a centrifugal fan fault monitoring method, electronic device and storage medium, comprising the following steps: monitoring the operating parameters of the centrifugal fan by an integrated sensor in the centrifugal fan system, collecting the original data of the centrifugal fan operating parameters, and preprocessing the collected original data, wherein the centrifugal fan operating parameters are divided into mechanical performance parameters and electrical performance parameters; analyzing the mechanical performance parameters and electrical performance parameters of the centrifugal fan respectively based on the preprocessed data. The present invention accurately locates the location where the fault occurs by combining the structural characteristics and operating logic of the centrifugal fan. Once a fault occurs, the fault point can be quickly locked, which not only improves the maintenance efficiency, but also reduces the waste of resources caused by blind troubleshooting. At the same time, it can also automatically recommend corresponding maintenance measures according to the type and severity of the fault, providing strong support for maintenance personnel.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fans, and in particular to a centrifugal fan fault monitoring method, electronic equipment and storage medium. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and deliver gas in parallel. It is a driven fluid machine; an EC (Eltrical Commutation) fan refers to a centrifugal fan that uses a digital brushless DC outer rotor motor or a centrifugal fan that uses an electric motor. The power supply of the EC motor is a DC power supply, a built-in DC to AC converter, a rotor position feedback, a three-phase AC, a permanent magnet, and a synchronous motor. The DC brushless is only the appearance of the power supply quality and the motor, not the essence of the motor. The EC motor is essentially a three-phase AC permanent magnet synchronous motor; the centrifugal fan combines advanced electronic control technology and DC brushless motor technology to achieve efficient and intelligent fan control. In today's society, green, low-carbon and intelligent and efficient have become important development trends. Enterprises are actively seeking ways to save energy and reduce emissions. Centrifugal fans, as intelligent energy-saving devices driven by electronically commutated DC motors, meet this background demand with their excellent performance and green concepts.

[0003] However, when using centrifugal fans, although most existing technologies can monitor the centrifugal fans during operation to determine the operating status of the centrifugal fans, false alarms and missed alarms still occur frequently, and they cannot be fully controlled, which in turn affects the use of the centrifugal fans. For example, in the existing technology, the use status of the centrifugal fans is monitored by collecting single characteristic data such as vibration or current of the fans, and then cooperating with expert platforms or complex fault diagnosis models. Although the judgment accuracy is high, it is not practical to monitor low-end and mid-end fans, and it is not comprehensive enough and cannot effectively play a monitoring role. At the same time, for centrifugal fans, The internal causes of fan failure, such as mechanical causes such as rotor imbalance, rotor misalignment, surge, oil film vortex, rotor radial friction, bearing failure, and electrical performance causes such as poor fan air intake, poor fan air outlet, and poor fan heat dissipation, cannot be accurately and timely discovered, which can easily cause safety hazards; moreover, fan fault diagnosis methods cannot meet the needs of such applications. They are difficult to use and not very practical for equipment maintenance personnel. Therefore, fan failures in most conventional civil industrial systems are mainly maintained by manual regular inspections and shutdown maintenance methods, causing the fan to work in a semi-fault state for a long time until it is seriously damaged.

[0004] Therefore, how to continuously monitor the operating status of the centrifugal fan and improve the sensitivity and accuracy of fault detection is a technical problem that technical personnel need to solve. Summary of the invention

[0005] The present invention aims to provide a centrifugal fan fault monitoring method, electronic equipment and storage medium to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides a centrifugal fan fault monitoring method in a first aspect, comprising the following steps:

[0007] Step 1: monitor the operating parameters of the centrifugal fan through an integrated sensor to obtain operating parameter information of the centrifugal fan, where the operating parameter information includes a mechanical performance parameter set and an electrical performance parameter set;

[0008] Step 2, correspondingly extracting the operation benchmark information of the centrifugal fan, the operation benchmark information including a mechanical performance benchmark set and an electrical performance benchmark set; analyzing the mechanical performance parameter set and the electrical performance parameter set respectively to determine the abnormal fault of the centrifugal fan;

[0009] Step 3, performing fault analysis on the centrifugal fan in combination with the mechanical performance parameter set and the electrical performance parameter set to determine the severity of the abnormal fault;

[0010] Step 4, perform a preliminary diagnosis on the abnormal fault, determine the fault type of the centrifugal fan, and determine the location of the abnormal fault based on the position information of the integrated sensor and the data analysis result, and generate a monitoring report mark of the abnormal fault;

[0011] Step 5: issuing an alarm message according to the fault type and the severity of the abnormal fault.

[0012] In one implementation method, the integrated sensor includes a temperature sensor, a vibration sensor, a rotation speed sensor, a current sensor, a voltage sensor, an air volume sensor, and a static pressure sensor;

[0013] The mechanical performance parameter set includes temperature parameters, vibration parameters and speed parameters;

[0014] The electrical performance parameter set includes current parameters, voltage parameters, air volume parameters and static pressure parameters;

[0015] The mechanical performance benchmark set includes a temperature benchmark value, a vibration benchmark value, and a speed benchmark value;

[0016] The electrical performance reference set includes a current reference value, a voltage reference value, an air volume reference value, and a static pressure reference value.

[0017] In one implementation method, in step 2, analyzing the set of mechanical property parameters includes:

[0018] Each subset of the mechanical performance parameter set is compared with each subset of the mechanical performance benchmark set, respectively, to determine whether the motor of the centrifugal fan is overheated, and to simultaneously generate a temperature change trend chart; and to determine whether the centrifugal fan has abnormal temperature rise and abnormal vibration, and to determine the abnormal change value of the speed parameter;

[0019] If any subset of the mechanical performance parameter set is abnormal, a mechanical performance evaluation model is constructed and a mechanical performance evaluation index is calculated;

[0020] According to the size of the mechanical performance evaluation index, the mechanical performance is divided into different levels, namely excellent level, good level, general level, and poor level. Based on the mechanical performance evaluation index, it is judged whether the mechanical performance of the centrifugal fan is in a good state;

[0021] In one implementation method, in step 2, the electrical performance parameter set is classified, including:

[0022] Analyze the relationship between the current parameters and voltage parameters of the electrical performance parameter set, evaluate the energy efficiency and power factor of the motor, and determine the impact of voltage fluctuations on current and centrifugal fan performance;

[0023] and analyzing the relationship between the air volume parameter and the static pressure parameter of the electrical performance parameter set, evaluating the aerodynamic performance of the centrifugal fan, and determining the pressure output capacity of the centrifugal fan;

[0024] Based on the mechanical performance parameter set and the electrical performance parameter set, an electrical performance evaluation model is constructed to calculate an electrical performance evaluation index;

[0025] According to the size of the electrical performance evaluation index, the electrical performance is divided into different levels, namely excellent level, good level, general level, and poor level. Based on the electrical performance evaluation index, it is judged whether the electrical performance of the fan is in good condition.

[0026] In one implementation method, the calculation formula of the mechanical property evaluation index is:

[0027]

[0028] in, is the mechanical property evaluation index, To monitor the motor temperature in real time, is the reference value of temperature, i.e. the normal operating temperature of the motor. is the standard deviation of temperature, is the speed monitored in real time. is the maximum speed, is the minimum value of the speed, corresponding to the start-up state of the fan, is the current vibration amplitude, is the reference value of vibration, that is, the vibration amplitude during normal operation. is the standard deviation of the vibration amplitude, The value range of is 0 to 1;

[0029] In one implementation method, the calculation formula of the electrical performance evaluation index is:

[0030]

[0031] in, is the electrical performance evaluation index, For real-time monitoring of current, is the reference value of the current, that is, the current of the motor at rated power, is the standard deviation of the current, For real-time monitoring of voltage, and They are the minimum and maximum voltages, corresponding to the start-up and full-load operation of the centrifugal fan. To monitor the wind volume in real time, is the reference value of air volume, i.e. the air volume of the centrifugal fan under rated conditions. is the standard deviation of air volume, For real-time monitoring of static pressure, is the reference value of static pressure, that is, the static pressure of the centrifugal fan under rated conditions. is the standard deviation of static pressure, The value range is 0 to 1.

[0032] In an implementation method, in step 3, performing fault analysis on the centrifugal fan in combination with the mechanical performance parameter set and the electrical performance parameter set includes:

[0033] Analyze the mechanical performance evaluation index and the electrical performance evaluation index to determine the degree of influence of the mechanical performance evaluation index and the electrical performance evaluation index on the overall performance of the centrifugal fan, and determine the weights of the mechanical performance evaluation index and the electrical performance evaluation index in the abnormality evaluation according to the analysis results;

[0034] Calculating the degree of deviation of the mechanical performance evaluation index and the electrical performance evaluation index from their respective reference values ​​respectively, and taking a weighted sum of the degree of deviation of the mechanical performance evaluation index and the electrical performance evaluation index according to the magnitude of the degree of deviation combined with the determined weight, to obtain an abnormality evaluation coefficient;

[0035] Based on the size of the abnormal evaluation coefficient, the abnormal faults of the centrifugal fan are divided into different abnormal levels, namely, a slight abnormal level, a medium abnormal level and a severe abnormal level, and an abnormal threshold value of each abnormal level is set;

[0036] The calculated abnormality assessment coefficient is compared with the set abnormality threshold to determine the current abnormality level of the centrifugal fan.

[0037] In one implementation method, the calculation formula of the abnormal assessment coefficient is:

[0038]

[0039] in, is the abnormal assessment coefficient, is the mechanical property evaluation index, is the benchmark value of the mechanical performance evaluation index, is the maximum value of the mechanical property evaluation index, is the electrical performance evaluation index, is the reference value of the electrical performance evaluation index, is the maximum value of the electrical performance evaluation index, is the weight of the mechanical property evaluation index, is the weight of the electrical performance evaluation index, The value range is from 0 to 1, where 1 indicates the most severe abnormality and 0 indicates no abnormality.

[0040] In an implementation method, a plurality of the abnormal levels correspond to a plurality of the abnormal thresholds, wherein the abnormal threshold includes an upper threshold and a lower threshold;

[0041] The multiple abnormal levels and the multiple abnormal thresholds satisfy the following relationship:

[0042] Slight abnormality level ;

[0043] Medium abnormality level ;

[0044] Severe abnormality level ;

[0045] in, is the abnormal assessment coefficient, is the lower threshold corresponding to the medium abnormality level and the upper threshold corresponding to the slight abnormality level, is the lower threshold corresponding to the severe abnormality level and the upper threshold corresponding to the moderate abnormality level. , .

[0046] In one implementation method, step 5 includes:

[0047] When a fault is determined, the monitoring report, the fault type and the severity of the abnormal fault are immediately sent to the mobile terminal through sound and light alarms, SMS notifications, and email reminders. The monitoring report contains the fault type, occurrence time, severity and recommended maintenance measures;

[0048] When the fault is eliminated, the centrifugal fan resumes normal operation through automatic restart or manual reset. After the centrifugal fan restarts, its operating status continues to be monitored by sensors to ensure that the fault has been completely eliminated.

[0049] A second aspect of the present application provides an electronic device, including:

[0050] Processor; and

[0051] The memory stores executable codes thereon, and when the executable codes are executed by the processor, the processor is caused to execute the method as described above.

[0052] A third aspect of the present application provides a storage medium having executable code stored thereon. When the executable code is executed by a processor of a control system, the processor is caused to execute the method described above.

[0053] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0054] 1. The present invention provides a centrifugal fan fault monitoring method. By combining the structural characteristics and operation logic of the centrifugal fan, the fault location can be accurately located. Once a fault occurs, the fault point can be quickly locked, which not only improves the maintenance efficiency, but also reduces the waste of resources caused by blind troubleshooting. At the same time, it can also automatically recommend corresponding maintenance measures according to the type and severity of the fault, providing strong support for maintenance personnel.

[0055] 2. The present invention provides a centrifugal fan fault monitoring method, which integrates a variety of high-precision sensors to monitor the mechanical performance parameters and electrical performance parameters of the centrifugal fan in real time, and provides comprehensive operating status data for the centrifugal fan, so that signs of deviation from normal operating parameters can be captured in time. Combined with preset reference values, corresponding fault characteristics can be accurately identified, which significantly improves the reliability and safety of the centrifugal fan, reduces the risk of unexpected shutdown, and ensures the continuity and stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0057] Figure 1 The figure is a flow chart of the method of the present invention.

[0058] Figure 2 It is a structural schematic diagram of the electronic device of the present invention. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Example 1

[0061] like Figure 1 As shown, the present invention provides a centrifugal fan fault monitoring method, comprising the following steps:

[0062] Step 1, integrating high-precision sensors in the centrifugal fan system to monitor the operating parameters of the centrifugal fan, collecting raw data of the operating parameters of the centrifugal fan, and preprocessing the collected raw data, wherein the operating parameters of the centrifugal fan include a set of mechanical performance parameters and a set of electrical performance parameters, the mechanical performance parameters are temperature parameters, vibration parameters, and speed parameters, and the electrical performance parameters are current parameters, voltage parameters, air volume parameters, and static pressure parameters. A variety of high-precision sensors are integrated in the centrifugal fan system to monitor the mechanical performance parameters and electrical performance parameters of the centrifugal fan in real time. The integrated sensors include temperature sensors, vibration sensors, speed sensors, current sensors, voltage sensors, air volume sensors, and static pressure sensors. Based on the integrated multiple high-precision sensors The sensor obtains the original data of the mechanical performance parameters and electrical performance parameters of the centrifugal fan, wherein the mechanical performance parameters are temperature parameters, vibration parameters, and speed parameters, and the electrical performance parameters are current parameters, voltage parameters, air volume parameters, and static pressure parameters. The obtained original data is preprocessed, and the preprocessing operation includes the steps of data cleaning, data format conversion, and data calibration. Data cleaning is used to remove noise, abnormal values, etc. in the data to improve the accuracy and reliability of the data. Data format conversion is used to convert the data collected by different sensors into a unified format for subsequent data analysis and processing. Data calibration is used to calibrate the sensor to ensure the accuracy of the measurement results, which is achieved by comparing with the standard value and adjusting the measurement parameters of the sensor.

[0063] Step 2, based on the preprocessed data, analyze the mechanical performance parameters and electrical performance parameters of the centrifugal fan respectively, identify abnormal modes and potential faults, extract the preprocessed mechanical performance parameters and electrical performance parameters data, and analyze the mechanical performance parameters and electrical performance parameters of the centrifugal fan respectively in combination with the preset mechanical performance parameters and electrical performance parameters baseline values; extract the operation benchmark information of the centrifugal fan, the operation benchmark information includes a mechanical performance benchmark set and an electrical performance benchmark set, wherein the mechanical performance benchmark set includes a temperature benchmark value, a vibration benchmark value and a speed benchmark value; the electrical performance benchmark set includes a current benchmark value, a voltage benchmark value, an air volume benchmark value and a static pressure benchmark value; the mechanical performance benchmark set and the electrical performance benchmark set are both benchmark values ​​corresponding to various parameters of the centrifugal fan under normal operating conditions.

[0064] For the mechanical performance parameters of the centrifugal fan, compare the motor temperature data of the centrifugal fan with the benchmark value to identify whether there is overheating, analyze the temperature change trend, determine whether there is abnormal temperature rise, calculate the vibration amplitude and frequency, compare with the benchmark value, identify abnormal vibration, monitor the stability of the speed, identify speed fluctuations and abnormal changes, combine temperature, vibration, and speed parameters to build a mechanical performance evaluation model, and calculate the mechanical performance evaluation index. According to the size of the mechanical performance evaluation index, the mechanical performance is divided into different levels, namely excellent level, good level, general level, and poor level, to determine whether the mechanical performance of the centrifugal fan is in good condition. For the electrical performance parameters of the centrifugal fan, monitor the stability of the current, identify current fluctuations or abnormal peaks, analyze the relationship between current and voltage, evaluate the energy efficiency and power factor of the motor, monitor the stability of the voltage, and ensure that the motor operates at the rated voltage. , analyze the impact of voltage fluctuations on current and centrifugal fan performance, monitor the stability of air volume, identify air volume fluctuations and abnormal reductions, analyze the relationship between air volume, speed and static pressure, evaluate the aerodynamic performance of centrifugal fans, monitor the stability of static pressure, identify static pressure fluctuations and abnormal changes, analyze the relationship between static pressure, air volume and speed, evaluate the pressure output capacity of centrifugal fans, and build an electrical performance evaluation model based on current parameters, voltage parameters, air volume parameters and static pressure parameters. Calculate the electrical performance evaluation index and divide the electrical performance into different levels according to the size of the electrical performance evaluation index, namely excellent level, good level, general level and poor level, to determine whether the electrical performance of the fan is in good condition, identify abnormal modes according to the changing trends of the mechanical performance evaluation index and the electrical performance evaluation index, analyze the relationship between the abnormal mode and the operating status of the centrifugal fan, and determine the fault type of the abnormal mode based on historical data.

[0065] Furthermore, the calculation formula of the mechanical property evaluation index is:

[0066]

[0067] in, is the mechanical property evaluation index, To monitor the motor temperature in real time, is the reference value of temperature, i.e. the normal operating temperature of the motor. is the standard deviation of temperature, which is used to measure the sensitivity to temperature fluctuations, is the speed monitored in real time. is the maximum speed, is the minimum value of the speed, corresponding to the start-up state of the fan, is the current vibration amplitude, is the reference value of vibration, that is, the vibration amplitude during normal operation. is the standard deviation of the vibration amplitude, which is used to measure the sensitivity of the vibration. The value range is from 0 to 1, where 1 indicates perfect mechanical properties and 0 indicates extremely poor performance. The temperature part uses an exponential function to measure the degree of deviation from the reference temperature, the speed part uses a limit function to measure the stability of the speed, and the vibration part uses a root function to measure the degree of deviation of the vibration amplitude. The excellent grade ranges from 0.8 to 1, the good grade ranges from 0.6 to 0.8, the general grade ranges from 0.4 to 0.6, and the poor grade ranges from 0 to 0.4.

[0068] The calculation formula of the electrical performance evaluation index is:

[0069]

[0070] in, is the electrical performance evaluation index, For real-time monitoring of current, is the reference value of the current, that is, the current of the motor at rated power, is the standard deviation of the current, which is used to measure the sensitivity of current fluctuations. For real-time monitoring of voltage, and They are the minimum and maximum voltages, corresponding to the start-up and full-load operation of the centrifugal fan. To monitor the wind volume in real time, is the reference value of air volume, i.e., the air volume of the centrifugal fan under rated conditions. The so-called rated conditions refer to the state of operation according to the initial design parameters of the centrifugal fan, and the reference value of the air volume is the air volume corresponding to the operation of the initial design parameters. Specifically, the air volume of the centrifugal fan under rated conditions in this example is 2000m³ / h; is the standard deviation of air volume, which is used to measure the sensitivity of air volume fluctuations. For real-time monitoring of static pressure, is the reference value of static pressure, i.e., the static pressure of the centrifugal fan under rated conditions. The so-called rated conditions refer to the state of operation according to the initial design parameters of the centrifugal fan, and the reference value of static pressure is the corresponding air volume when the initial design parameters are used for operation. Specifically, the static pressure of the centrifugal fan under rated conditions in this example is 500 Pa. is the standard deviation of static pressure, which is used to measure the sensitivity of static pressure fluctuations, The value range is from 0 to 1, where 1 indicates perfect electrical performance and 0 indicates extremely poor performance. The current part uses an exponential function to measure the degree of deviation from the baseline current, the voltage part uses a limit function to measure the stability of the voltage, and the air volume and static pressure parts use a root function to measure the degree of deviation from the fluctuation. The excellent grade ranges from 0.8 to 1, the good grade ranges from 0.6 to 0.8, the general grade ranges from 0.4 to 0.6, and the poor grade ranges from 0 to 0.4.

[0071] Step 3: According to the operating parameter baseline value of the centrifugal fan, the analysis results of the mechanical performance parameters and electrical performance parameters of the centrifugal fan are comprehensively analyzed to evaluate the severity of the abnormal fault.

[0072] Step 4: Perform a preliminary diagnosis of the abnormal fault, determine the type of fault, combine the sensor's location information and data analysis results, accurately locate the location of the fault, and set up a multi-level protection function to implement an abnormal self-protection mechanism.

[0073] Step 5: According to the fault diagnosis result, combined with the determined fault type and its severity, send an alarm message and perform maintenance inspection.

[0074] Example 2

[0075] like Figure 1 As shown, based on Example 1, the present invention provides a technical solution: Preferably, in step 3, the evaluation process of the severity of the abnormal fault is:

[0076] Obtain the operating parameter benchmark values ​​of the centrifugal fan from the manufacturer or professional database, extract the associated data of the mechanical performance evaluation index and the electrical performance evaluation index obtained by the centrifugal fan analysis according to the preset operating parameter benchmark values ​​of the centrifugal fan, analyze the mechanical performance evaluation index and the electrical performance evaluation index, clarify the influence of the mechanical performance evaluation index and the electrical performance evaluation index on the overall performance of the centrifugal fan, and determine the weights of the mechanical performance evaluation index and the electrical performance evaluation index in the abnormal evaluation according to the analysis results, calculate the deviation of the mechanical performance evaluation index and the electrical performance evaluation index from their respective benchmark values, and perform weighted summation of the deviation of the mechanical performance evaluation index and the electrical performance evaluation index according to the size of the deviation combined with the determined weights to obtain an abnormal evaluation coefficient to evaluate the severity of the abnormal fault of the centrifugal fan, and divide the abnormal fault of the centrifugal fan into different abnormal levels based on the evaluation results of the severity of the abnormal fault of the centrifugal fan and the size of the abnormal evaluation coefficient, namely, a slight abnormal level, a medium abnormal level and a severe abnormal level, and set an abnormal threshold for each abnormal level, compare the calculated abnormal evaluation coefficient with the set abnormal threshold, and determine the current abnormal level of the centrifugal fan.

[0077] Furthermore, the calculation formula of the abnormal assessment coefficient is:

[0078]

[0079] in, is the abnormal assessment coefficient, is the mechanical property evaluation index, is the benchmark value of the mechanical performance evaluation index, is the maximum value of the mechanical property evaluation index, is the electrical performance evaluation index, is the reference value of the electrical performance evaluation index, is the maximum value of the electrical performance evaluation index, is the weight of the mechanical property evaluation index, is the weight of the electrical performance evaluation index, The value range is from 0 to 1, where 1 indicates the most severe abnormality and 0 indicates no abnormality.

[0080] Furthermore, multiple abnormality levels correspond to multiple abnormality thresholds, wherein the abnormality threshold includes an upper threshold and a lower threshold.

[0081] Multiple abnormal levels and multiple abnormal thresholds satisfy the following relationship:

[0082] Slight abnormality level ; The fan operating parameters deviate slightly, but it does not affect normal operation and only requires routine maintenance and monitoring;

[0083] Medium abnormality level ; The fan operating parameters have a moderate deviation and further diagnosis and adjustment are required to prevent further performance deterioration;

[0084] Severe abnormality level ; The operating parameters of the fan are seriously deviated from the normal values, and immediate measures need to be taken, such as shutdown inspection and maintenance, to avoid potential serious failures;

[0085] in, is the abnormal assessment coefficient, is the lower threshold corresponding to the medium abnormality level and the upper threshold corresponding to the slight abnormality level, is the lower threshold corresponding to the severe abnormality level and the upper threshold corresponding to the moderate abnormality level. , .

[0086] In step 4, the process of locating the fault location is as follows:

[0087] The sensor monitors the operating status of the centrifugal fan in real time, conducts preliminary analysis on the collected data, identifies abnormal data, such as abnormal temperature increase, increased vibration amplitude, current fluctuation, etc., and identifies the characteristics and manifestations of the fault based on the abnormal data, such as overheating, overload, abnormal vibration, etc. According to the fault characteristics and manifestations, combined with the operating principle of the centrifugal fan and common fault types (such as electrical faults, mechanical faults, sensor faults, etc.), the fault is preliminarily classified, the identified fault characteristics are matched with the known fault types, and the fault type is preliminarily determined. The structural characteristics and operating logic of the centrifugal fan are used to further narrow the fault scope, combined with the preliminarily determined fault type, the fault location is accurately located, and according to the fault diagnosis results, a multi-level protection function is set to realize the abnormal self-protection mechanism, among which the multi-level protection function It is divided into primary protection, secondary protection and tertiary protection. The primary protection is an early warning mechanism. When a slight abnormality occurs in the centrifugal fan, the early warning mechanism is activated, and the relevant personnel are notified by sound and light alarms and SMS reminders, and the function of automatically adjusting the operating parameters is triggered, including reducing the speed and adjusting the air volume to reduce the impact of the fault on the fan; the secondary protection is fault isolation. When the fault develops further and reaches a certain degree of severity, the fault isolation mechanism is activated. By cutting off the power supply or control signal of the faulty part, the faulty part is isolated from the entire system to prevent the fault from spreading and worsening; the third-level protection is shutdown protection. When the fault reaches the level where it cannot continue to operate, the shutdown protection mechanism is activated. The shutdown protection mechanism will immediately cut off all power supplies and control signals of the centrifugal fan, stop the fan and protect it from further damage.

[0088] In step 5, the process of sending alarm information and performing maintenance inspection is as follows:

[0089] According to the fault diagnosis results, the faulty parts are checked and repaired. When a fault is determined, the fault information and severity are immediately sent to relevant personnel through sound and light alarms, SMS notifications, and email reminders. The alarm information includes the fault type, occurrence time, severity, and recommended maintenance measures. After receiving the alarm information, relevant personnel conduct maintenance inspections on site and take corresponding maintenance measures according to the fault type and severity, such as replacing damaged parts, adjusting operating parameters, cleaning centrifugal fans, etc. During the maintenance and inspection process, the fault handling process and results are recorded in detail, and the handling results are fed back to relevant personnel to obtain the fault handling status and the current status of the centrifugal fan. After the fault is eliminated, the centrifugal fan resumes normal operation through automatic restart or manual reset. After the centrifugal fan restarts, its operating status continues to be monitored through sensors to ensure that the fault has been completely eliminated.

[0090] Example 3

[0091] See also Figure 2 , the electronic device 1000 includes a memory 1010 and a processor 1020.

[0092] The processor 1020 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0093] The memory 1010 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. Among them, ROM can store static data or instructions required by the processor 1020 or other modules of the computer. The permanent storage device may be a readable and writable storage device. The permanent storage device may be a non-volatile storage device that does not lose the stored instructions and data even after the computer is powered off. In some embodiments, the permanent storage device uses a large-capacity storage device (such as a magnetic or optical disk, flash memory) as a permanent storage device. In some other embodiments, the permanent storage device may be a removable storage device (such as a floppy disk, optical drive). The system memory may be a readable and writable storage device or a volatile readable and writable storage device, such as a dynamic random access memory. The system memory may store some or all instructions and data required by the processor at runtime. In addition, the memory 1010 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory 1010 may include a readable and / or writable removable storage device, such as a laser disc (CD), a read-only digital versatile disc (such as a DVD-ROM, a double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (such as an SD card, a mini SD card, a Micro-SD card, etc.), a magnetic floppy disk, etc. The computer-readable storage medium does not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0094] The memory 1010 stores executable codes, and when the executable codes are processed by the processor 1020 , the processor 1020 can execute part or all of the methods described above.

[0095] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A centrifugal fan fault monitoring method, characterized in that: The following steps are involved: Step 1, monitoring the operating parameters of the centrifugal fan through an integrated sensor to obtain the operating parameter information of the centrifugal fan, wherein the operating parameter information includes a mechanical performance parameter set and an electrical performance parameter set; the integrated sensor includes a temperature sensor, a vibration sensor, a speed sensor, a current sensor, a voltage sensor, an air volume sensor, and a static pressure sensor; the mechanical performance parameter set includes a temperature parameter, a vibration parameter, and a speed parameter; the electrical performance parameter set includes a current parameter, a voltage parameter, an air volume parameter, and a static pressure parameter; Step 2, correspondingly extracting the operation benchmark information of the centrifugal fan, wherein the operation benchmark information includes a mechanical performance benchmark set and an electrical performance benchmark set; The mechanical performance benchmark set includes a temperature benchmark value, a vibration benchmark value, and a speed benchmark value; the electrical performance benchmark set includes a current benchmark value, a voltage benchmark value, an air volume benchmark value, and a static pressure benchmark value; Analyzing the mechanical performance parameter set and the electrical performance parameter set respectively to determine an abnormal fault of the centrifugal fan; In the step 2, the mechanical performance parameter set is analyzed, including: comparing each subset of the mechanical performance parameter set with each subset of the mechanical performance benchmark set, respectively, determining whether the motor of the centrifugal fan is overheated, and synchronously generating a temperature change trend chart; and determining whether the centrifugal fan has an abnormal temperature rise phenomenon and whether the centrifugal fan has abnormal vibration, and determining the abnormal change value of the speed parameter; If any subset of the mechanical performance parameter set is abnormal, a mechanical performance evaluation model is constructed and a mechanical performance evaluation index is calculated; the calculation formula of the mechanical performance evaluation index is: ； Among them, M is the mechanical performance evaluation index, T is the motor temperature monitored in real time, is the reference value of temperature, i.e. the normal operating temperature of the motor. is the standard deviation of temperature, V is the speed monitored in real time, is the maximum speed, is the minimum value of the speed, corresponding to the start-up state of the fan, is the current vibration amplitude, is the reference value of vibration, that is, the vibration amplitude during normal operation. is the standard deviation of the vibration amplitude, and the value of M ranges from 0 to 1; According to the size of the mechanical performance evaluation index, the mechanical performance is divided into different levels, namely excellent level, good level, general level, and poor level, and whether the mechanical performance of the centrifugal fan is in a good state is judged based on the mechanical performance evaluation index; Step 3, performing fault analysis on the centrifugal fan in combination with the mechanical performance parameter set and the electrical performance parameter set to determine the severity of the abnormal fault; Step 4, performing a preliminary diagnosis on the abnormal fault, determining the fault type of the centrifugal fan, and determining the location of the abnormal fault according to the position information of the integrated sensor and the fault analysis result, and generating a monitoring report mark of the abnormal fault; Step 5: issuing an alarm message according to the fault type and the severity of the abnormal fault.

2. A centrifugal fan fault monitoring method according to claim 1, characterized in that: In the step 2, analyzing the electrical performance parameter set includes: Performing relationship analysis on current parameters and voltage parameters of the electrical performance parameter set, evaluating motor energy efficiency and power factor of the centrifugal fan, and determining the impact of voltage fluctuations on current and centrifugal fan performance; and performing a relationship analysis on the air volume parameter and the static pressure parameter of the electrical performance parameter set, evaluating the aerodynamic performance of the centrifugal fan, and determining the pressure output capacity of the centrifugal fan; Based on the mechanical performance parameter set and the electrical performance parameter set, an electrical performance evaluation model is constructed to calculate an electrical performance evaluation index; According to the size of the electrical performance evaluation index, the electrical performance is divided into different levels, namely excellent level, good level, general level, and poor level. Based on the electrical performance evaluation index, it is judged whether the electrical performance of the fan is in a good state.

3. A centrifugal fan fault monitoring method according to claim 2, characterized in that: The calculation formula of the electrical performance evaluation index is: ； Where E is the electrical performance evaluation index, I is the current monitored in real time, is the reference value of the current, that is, the current of the motor at rated power, is the standard deviation of the current, D is the voltage monitored in real time, and are the minimum and maximum voltage values, corresponding to the start-up and full-load operation of the centrifugal fan, and P is the air volume monitored in real time. is the reference value of air volume, i.e. the air volume of the centrifugal fan under rated conditions. is the standard deviation of air volume, Q is the static pressure monitored in real time, is the reference value of static pressure, that is, the static pressure of the centrifugal fan under rated conditions. is the standard deviation of static pressure, and the value of E ranges from 0 to 1.

4. A centrifugal fan fault monitoring method according to claim 2, characterized in that: In step 3, performing fault analysis on the centrifugal fan in combination with the mechanical performance parameter set and the electrical performance parameter set includes: Analyze the mechanical performance evaluation index and the electrical performance evaluation index to determine the degree of influence of the mechanical performance evaluation index and the electrical performance evaluation index on the overall performance of the centrifugal fan, and determine the weights of the mechanical performance evaluation index and the electrical performance evaluation index in the abnormality evaluation according to the analysis results; Calculating the degree of deviation of the mechanical property evaluation index and the electrical property evaluation index from their respective reference values ​​respectively, and performing weighted summation of the degree of deviation of the mechanical property evaluation index and the electrical property evaluation index according to the magnitude of the degree of deviation combined with the determined weight, to obtain an abnormality evaluation coefficient; Based on the size of the abnormality assessment coefficient, the abnormal fault of the centrifugal fan is divided into different abnormality levels, namely, a slight abnormality level, a medium abnormality level and a severe abnormality level, and an abnormality threshold of each abnormality level is set; The calculated abnormality assessment coefficient is compared with the set abnormality threshold to determine the current abnormality level of the centrifugal fan.

5. A centrifugal fan fault monitoring method according to claim 4, characterized in that: The calculation formula of the abnormal assessment coefficient is: ； Among them, is the abnormal evaluation coefficient, M is the mechanical property evaluation index, is the benchmark value of the mechanical performance evaluation index, is the maximum value of the mechanical performance evaluation index, E is the electrical performance evaluation index, is the reference value of the electrical performance evaluation index, is the maximum value of the electrical performance evaluation index, is the weight of the mechanical property evaluation index, is the weight of the electrical performance evaluation index. The value of AP ranges from 0 to 1, where 1 indicates the most severe abnormality and 0 indicates no abnormality.

6. A centrifugal fan fault monitoring method according to claim 4, characterized in that: The plurality of abnormal levels correspond to the plurality of abnormal thresholds, wherein the abnormal thresholds include an upper threshold and a lower threshold; The multiple abnormal levels and the multiple abnormal thresholds satisfy the following relationship: Slight abnormality level ; Medium abnormality level ; Severe abnormality level ; Among them, AP is the abnormal assessment coefficient, is the lower threshold corresponding to the medium abnormality level and the upper threshold corresponding to the slight abnormality level, is the lower threshold corresponding to the severe abnormality level and the upper threshold corresponding to the moderate abnormality level. , .

7. A centrifugal fan fault monitoring method according to claim 1, characterized in that: The step 5 includes: When a fault is determined to exist, the monitoring report, the fault type and the severity of the abnormal fault are immediately sent to the mobile terminal by means of sound and light alarm, SMS notification and email reminder. The monitoring report includes the fault type, occurrence time, severity and recommended maintenance measures; When the fault is eliminated, the centrifugal fan resumes normal operation through automatic restart or manual reset. After the centrifugal fan restarts, its operating status continues to be monitored through the integrated sensor to ensure that the fault has been completely eliminated.

8. An electronic device, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the centrifugal fan fault monitoring method according to any one of claims 1 to 7.

9. A storage medium, characterized in that: An executable code is stored thereon, and when the executable code is executed by a processor of a control system, the processor is caused to execute the centrifugal fan fault monitoring method according to any one of claims 1 to 7.

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