A method, apparatus, and equipment for detecting clogging of the atomizing disc in a centrifugal atomizer for lithium iron phosphate.

Abstract

This invention discloses a method, apparatus, and device for detecting clogging of the atomizing disc in a centrifugal atomizer for lithium iron phosphate. The method includes: acquiring vibration and sound data of the centrifugal atomizer spindle under different process parameters during normal operation; establishing vibration and sound calibration sets under different process parameters using the vibration and sound data; and determining whether the centrifugal atomizer spindle is malfunctioning during operation using the vibration and sound calibration sets. Abnormal spindle operation can produce abnormal amplitude and abnormal noise. Abnormal amplitude is caused by the spindle deforming due to the excitation of the atomizing disc, resulting in significant axial vibration. Due to the clogging of the atomizing disc, fluid jetting can lead to a force imbalance state at both ends of the shaft during bending, resulting in significant radial vibration. Therefore, this invention uses both sound and vibration abnormal data to achieve data acquisition, monitoring, and anomaly determination of the spindle's operating status, effectively monitoring the spindle's working condition.

Description

Technical Field

[0001] This invention relates to the field of detection technology for clogging of atomizing discs in centrifugal atomizers for lithium iron phosphate, and particularly to a method, apparatus, and equipment for detecting clogging of atomizing discs in centrifugal atomizers for lithium iron phosphate. Background Technology

[0002] Centrifugal spray dryers are named for their centrifugal atomizers. They are among the most widely used dryers in industrial production. The liquid is added to a high-speed rotating atomizing disc, where it is atomized into droplets by centrifugal force and then dried within the dryer. On the surface of the atomizing disc, the liquid diffuses in a thin film and is ejected at high speed from the nozzles at the circumference. The atomization effect depends on the circumferential velocity, the feeding rate, and certain physical properties of the liquid. Because the slurry contains powder, some powder remains at the nozzle positions after the drying process, leading to nozzle blockage. The atomizer's rotation speed is typically 8000-12000 r / min. When not blocked, the atomizing disc sprays the slurry at high speed and ejects it. However, when blockage occurs, the blocked side of the atomizing disc generates high-amplitude slurry output vibrations or strong instantaneous excitations on the main shaft. Under the influence of these vibrations, the main shaft axis gradually shifts, leading to a bent shaft state. This bent shaft state ultimately causes instability or even breakage of the main shaft. Therefore, it is necessary to propose a clogging monitoring method to address the problem of atomizing disc clogging. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a method, apparatus and equipment for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate, which can effectively monitor the working status of the spindle online.

[0004] According to one aspect of the present invention, a method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate is provided, comprising: acquiring vibration data and sound data of the centrifugal atomizer spindle operating normally under different process parameters; establishing vibration calibration sets and sound calibration sets under different process parameters through the vibration data and sound data; and determining whether the centrifugal atomizer spindle is abnormal during operation through the vibration calibration sets and sound calibration sets.

[0005] In the aforementioned technical solution, the blockage of the atomizing disc leads to two signals—abnormal amplitude and abnormal noise—in the abnormal operating state of the spindle. The abnormal amplitude is due to the spindle's deformation caused by the atomizing disc's vibration, resulting in significant axial vibration. In this case, the 2×rotational speed frequency dominates, creating a large amplitude vibration. Due to the blockage of the atomizing disc, fluid jetting causes a force imbalance at both ends of the shaft due to bending, further generating significant radial vibration. Additionally, the fluid ejected from the atomizing disc also generates high-amplitude liquid output frequency vibration. The superposition of these three vibrations causes significant damage to the shaft, which is reflected in the overall vibration frequency. Furthermore, the extended service life of the abnormal spindle can lead to mechanical loosening, generating numerous harmonic frequencies. The abnormal noise originates from the blockage of the atomizing disc; the reduced number of holes in the atomizing disc increases the pressure of the liquid jet on other holes, resulting in increased noise. Meanwhile, due to bending and deformation of the shaft, additional noise is generated during operation due to the friction between the shaft and the housing, and the tilting of the atomizing disc and the housing. Therefore, the above technical solution starts with two abnormal data, sound and vibration, to realize the data acquisition, data monitoring and abnormal judgment of the spindle working status.

[0006] In some embodiments, acquiring vibration and sound data of the centrifugal atomizer spindle under different process parameters during normal operation includes:

[0007] An even number of vibration sensors and several sound sensors are arranged on the side of the atomizing disc with the axis of the centrifugal atomizer as the center.

[0008] Calibrate the vibration sensor and the sound sensor;

[0009] Preprocessed data is collected using calibrated vibration and sound sensors;

[0010] Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are preprocessed using preprocessed data. After preprocessing, vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are obtained.

[0011] In the above technical solution, as mentioned above, abnormal spindle operation will generate axial vibration, radial vibration, and harmonic frequencies. The deformation of the spindle body generally occurs in the section from the atomizing disc to the center of the spindle. Therefore, the above technical solution considers placing an even number of vibration sensors on the side of the centrifugal atomizer axis closest to the atomizing disc. The even number of vibration sensors arranged in opposite directions helps monitor the initial vibration, because in the early stages of spindle damage, axial vibration is the primary concern, followed by radial vibration, and finally harmonic frequencies. Therefore, the opposite arrangement helps monitor axial vibration and facilitates effective detection of abnormal vibration in its early stages.

[0012] In some embodiments, the vibration sensor and the sound sensor are calibrated, specifically:

[0013] Vibration and sound data are collected when the main shaft of the centrifugal atomizer stops working, using vibration and sound sensors.

[0014] Vibration and sound data when the centrifugal atomizer spindle stops working are used as calibration data as calibration parameters for the vibration and sound sensors.

[0015] In the above technical solution, considering the use of multiple sensors deployed in the centrifugal atomizer and the harsh working environment, sensor calibration is necessary to ensure the accuracy of data monitoring. Given the significant noise from sound and vibration in the centrifugal atomizer's working environment, data is collected during calibration while the atomizer is not in operation.

[0016] In some embodiments, preprocessed data is acquired using calibrated vibration and sound sensors, including:

[0017] Vibration and sound data of the centrifugal atomizer spindle during idling under different process parameters are collected using vibration and sound sensors.

[0018] In the above technical solution, to achieve effective monitoring and considering the significant sound and vibration generated during the operation of the centrifugal atomizer and the ambient noise, vibration and noise data are collected during idling. Idle data is collected and retained for different process parameters, which helps improve the accuracy of subsequent real-time data analysis.

[0019] In some embodiments, preprocessing is performed on vibration data and sound data of the centrifugal atomizer spindle operating normally under different process parameters, including:

[0020] Vibration and sound data of the centrifugal atomizer spindle rotating only under different process parameters are used as background data. Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are used to obtain preprocessed data after subtracting the background data.

[0021] In the above technical solution, in order to avoid the influence of noise on the anomaly judgment, a background noise reduction method is used to collect real-time data. The background reference source is the preprocessed data collected in the previous embodiment, which can effectively ensure that the data will not be affected by background noise and vibration, thus preventing subsequent misjudgments.

[0022] In some embodiments, determining whether the centrifugal atomizer spindle is malfunctioning by using a vibration calibration set and a sound calibration set includes:

[0023] When the centrifugal atomizer spindle is working under predetermined process parameters, it collects real-time vibration data and sound data, and preprocesses the collected data.

[0024] By comparing the vibration data and sound data under the predetermined parameters in the vibration calibration set and sound calibration set with the real-time collected vibration data and sound data, if the predetermined vibration threshold or predetermined sound threshold is exceeded, the centrifugal atomizer will stop working.

[0025] In the above technical solution, comparing the calibration set with the preprocessed data can effectively determine the working status. Simultaneously, by setting vibration and sound thresholds, the degree of abnormality can be determined.

[0026] In some embodiments, if a predetermined vibration threshold or a predetermined sound threshold is exceeded, the centrifugal atomizer is stopped from operating, including:

[0027] The formula for obtaining the slurry output frequency of the centrifugal atomizer's atomizing disc is as follows:

[0028]

[0029] In the formula, A is the number of holes in the atomizing disc, and B is the spindle speed of the centrifugal atomizer;

[0030] A calibration ratio relationship was established using vibration and sound data from the normal operation of the centrifugal atomizer spindle under different process parameters.

[0031]

[0032] or

[0033]

[0034] Among them, C i D is the normal vibration scaling factor under the i-th process parameter. j X is the normal sound scaling factor under the j-th process parameter. i To collect vibration data of the centrifugal atomizer spindle under the i-th process parameter during normal operation, G j The sound data of the centrifugal atomizer spindle is collected under the i-th process parameter to ensure normal operation of the centrifugal atomizer spindle.

[0035] From the above three equations, we can determine the number of holes in the atomizing disc under a certain process parameter:

[0036]

[0037] or

[0038]

[0039] Where, xi To collect vibration data of the centrifugal atomizer spindle during operation under the i-th process parameter, g i Let a and b be the sound data collected when the centrifugal atomizer spindle is working under the i-th process parameter, and a and b be the theoretical number of holes collected when the centrifugal atomizer spindle is working under the i-th process parameter.

[0040] The theoretical number of blocked holes in the current atomizing disc can be obtained by calculating the value of |Aa| or |Ab|. When |Aa| or |Ab| is greater than 1, the number of blocked holes in the current atomizing disc is greater than 1.

[0041] In the above technical solution, since the atomizing disc blockage generally occurs during the production process, and a production interruption can cause significant losses, an analysis scheme is designed to determine the number of blocked holes in the atomizing disc. This can be understood as follows: if the number of blocked holes is small and will not cause significant damage to the spindle, it can be cleared after production is completed; if the number of blocked holes is large and could easily cause significant damage to the spindle, production must be stopped immediately. Furthermore, since the working principle of a centrifugal atomizer is similar to that of a water pump fan, its theoretical slurry output frequency can be easily calculated. When an anomaly occurs, a vibration with a higher amplitude at the theoretical slurry output frequency will occur. Further, a proportional relationship is established between the slurry output frequency and the collected data. Under abnormal conditions, the amplitude of the collected vibration and sound data will be several times higher than that under normal operating conditions. Therefore, the number of blocked holes can be calculated using this proportional relationship, and the number of blocked holes is used to determine whether production should be stopped. Through multiple experiments, the results obtained by this calculation method are relatively accurate. However, compared to directly dividing the collected data with normal data to obtain the magnification, this method can produce significant deviations due to differences in the number of holes, shaft speed, reinforced parts, and processing methods of different atomizers. After multiple tests, the accuracy of this technical solution exceeded 95%.

[0042] According to another aspect of the present invention, a device for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate is provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the method for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any of the preceding claims.

[0043] According to another aspect of the present invention, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the method for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any of the preceding claims. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating an embodiment of the method of the present invention;

[0046] Figure 2 This is a schematic diagram of the forward arrangement of sensors according to an embodiment of the method of the present invention;

[0047] Figure 3 This is a schematic diagram of the sensor layout from below, representing an embodiment of the method of the present invention.

[0048] Figure 4 This is a simplified overall schematic diagram of the centrifugal atomizer after installation, according to an embodiment of the method of the present invention. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] This invention provides a method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate, which can effectively monitor the working status of the spindle online.

[0051] Please see Figure 1 , Figure 1 This is a schematic flowchart of an embodiment of the method for detecting clogging of the atomizing disc in a centrifugal atomizer for lithium iron phosphate according to the present invention. It should be noted that if substantially the same result is obtained, the method of the present invention is not necessarily identical. Figure 1 The illustrated process sequence is limited. For example... Figure 1 As shown, the method includes the following steps:

[0052] S101 acquires vibration and sound data of the centrifugal atomizer spindle under different process parameters for normal operation.

[0053] In this embodiment, vibration data is expressed as vibration frequency. The process parameters are selectable, including pressure, temperature, moisture content, solids content of the feed liquid, hot air inlet temperature, dehydration rate, spindle speed, and number of holes in the atomizing disc. Moisture content, solids content of the feed liquid, spindle speed, and number of holes in the atomizing disc are preferred in this embodiment. The reason for selecting these parameters is that, after correlation experiments, it was found that these parameters have the highest correlation with abnormal spindle conditions, and selecting these parameters can better reflect the abnormal state of the spindle. It should be understood that the selection of these parameters is based on process parameters common to most centrifugal atomizers; other special process parameters may also be used, which will not be further elaborated in this embodiment. The selection of these parameters is also a key factor affecting vibration and noise. Blockage of the atomizing disc leads to abnormal spindle operation, resulting in two signals: abnormal amplitude and abnormal noise. The abnormal amplitude is due to the deformation of the spindle caused by the excitation of the atomizing disc, resulting in large axial vibration. In this case, the 2×speed frequency dominates, forming a large amplitude vibration. Due to the blockage of the atomizing disc, fluid jetting results in a torque imbalance when the upper and lower ends of the shaft are bent, leading to significant radial vibration. Furthermore, the fluid ejected from the atomizing disc also generates high-amplitude liquid output frequency vibrations. The superposition of these three vibrations causes significant damage to the shaft, which is reflected in the overall vibration frequency. Simultaneously, prolonged service life of the abnormal spindle can lead to mechanical loosening, generating numerous harmonic frequencies. Abnormal noise originates from atomizing disc blockage; the reduced number of orifices in the atomizing disc increases the pressure of the liquid jet on other orifices, resulting in increased noise. Additionally, shaft bending and deformation cause additional noise during operation due to friction between the shaft and the housing, and the tilting of the atomizing disc against the housing. Therefore, the above technical solution addresses this by collecting, monitoring, and identifying abnormalities in the spindle's operating status through both sound and vibration data.

[0054] Furthermore, this step also specifically includes the following steps:

[0055] An even number of vibration sensors and several sound sensors are arranged on the side of the atomizing disc with the axis of the centrifugal atomizer as the center.

[0056] Calibrate the vibration sensor and the sound sensor;

[0057] Preprocessed data is collected using calibrated vibration and sound sensors;

[0058] Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are preprocessed using preprocessed data. After preprocessing, vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are obtained.

[0059] Because abnormal spindle operation generates axial vibration, radial vibration, and harmonic frequencies, and the deformation of the spindle typically occurs between the atomizing disc and the center of the spindle, the above technical solution considers placing an even number of vibration sensors on the side of the centrifugal atomizer axis closest to the atomizing disc. Arranging the even number of vibration sensors facing each other helps in monitoring initial vibrations. Please refer to the diagram for the arrangement and installation. Figure 2-4 It needs to be further explained that, Figure 2-4 For illustrative purposes only, a schematic diagram of four vibration sensors, four sound sensors, and the centrifugal atomizer is shown; the overall schematic diagram of the centrifugal spray dryer is not provided. The diagram includes: the centrifugal atomizer body 1, including a main shaft 4. An even number of vibration sensors 6 and several sound sensors 7 are arranged near the atomizing disc along the centrifugal atomizer axis, along with sensor brackets 2 for mounting the sensors. The vibration sensors use contact probes; this type of round-headed vibration probe is existing technology and will not be described in detail here. However, it is important to note that the vibration probe must be in contact with the centrifugal atomizer housing to ensure measurement accuracy. In this embodiment, the sound sensors are placed within the bracket for illustrative purposes. It is undeniable that this installation method may cause bracket resonance, increasing interference to the sound sensors. Therefore, using an additional independent bracket to mount the sound sensors is also acceptable, but this embodiment will not explain further. It should also be noted that due to environmental interference, the closer the sound sensors are to the contact point between the atomizing disc and the main shaft, the better the measurement effect. However, interference from the jet sprayed from the atomizing disc should be avoided as much as possible. For a simplified overall schematic diagram of the centrifugal atomizer after installation in this embodiment, please refer to [link to schematic diagram]. Figure 4 The sensor bracket 2 is fixed to the housing 8 of the dryer. It should also be noted that resonance of the housing itself, or environmental noise and vibration, may affect the sensor's data acquisition. This embodiment only lists one mounting method for the bracket; it can also be fixed to the centrifugal atomizer. Compared to mounting on the housing, mounting on the centrifugal atomizer has the advantage of avoiding resonance or other noise effects caused by hard contact between the housing and the bracket.

[0060] It should be understood that different sizes of centrifugal atomizers and varying accuracy requirements allow for the deployment of more sensors. This embodiment will not elaborate further, and atomizers come in various shapes; this example only uses one of the most commonly used atomizers. Other atomizer shapes can be configured according to the arrangement described in this embodiment or the claims. Furthermore, since axial vibration appears first in the early stages of spindle damage, followed by radial vibration, and finally harmonic frequency, opposing arrangements help monitor axial vibration and effectively detect abnormal vibrations in the early stages. The so-called opposing arrangement refers to two sets of vibration sensors arranged opposite each other along a certain normal direction of the axis, such as... Figure 3 As shown.

[0061] Furthermore, the calibration process specifically includes the following steps: collecting vibration and sound data when the centrifugal atomizer spindle stops working using vibration and sound sensors; and using this vibration and sound data as calibration data for the vibration and sound sensors. In this embodiment, considering the use of multiple sensors deployed in the centrifugal atomizer and the harsh working environment, sensor calibration is necessary to ensure the accuracy of data monitoring. Given the high levels of noise from sound and vibration in the centrifugal atomizer's working environment, data is collected during the calibration process when the atomizer is not in operation. It should be understood that different sensors, limited by installation methods and atomizer operating environments, require different calibration procedures. This embodiment only provides an example of a calibration method applicable to most atomizers.

[0062] Furthermore, the data acquisition and preprocessing step specifically includes: collecting vibration and sound data of the centrifugal atomizer spindle during idling under different process parameters using vibration and sound sensors. In this embodiment, to achieve effective monitoring and considering the significant sound and vibration generated by the centrifugal atomizer during operation, as well as the ambient noise, the above technical solution collects vibration and noise data during idling. Retaining idling data collected for different process parameters helps improve the accuracy of subsequent real-time data analysis.

[0063] Furthermore, the preprocessing step also includes: using vibration and sound data from the centrifugal atomizer spindle rotating only under different process parameters as background data, and subtracting the background data from the vibration and sound data from the centrifugal atomizer spindle operating normally under different process parameters to obtain preprocessed data. In this embodiment, to avoid the influence of noise on anomaly judgment, a background noise reduction method is used to collect real-time data. The background reference source, i.e., the preprocessed data collected in the previous step, can effectively ensure that the data is not affected by background noise and vibration, thus preventing subsequent misjudgments. It should be understood that the preprocessing part mentioned in this embodiment is the most critical preprocessing step, which directly affects subsequent anomaly judgment. However, it should also be understood that, in order to further improve the accuracy of the data, techniques such as normalization, smoothing, and neural network learning can also be used to further process the vibration and sound data to ensure that the noise contained in the data is minimized. This will not be further elaborated in this embodiment.

[0064] S102 establishes vibration calibration sets and sound calibration sets under different process parameters using vibration data and sound data;

[0065] Z 振 ={z1,z2,...,z...} n ,}

[0066] S 声 ={s1,s2,……,s n ,}

[0067] It should be further explained that the calibration set establishment scheme can adopt completely randomized design, randomized block design, crossover design, factorial design, Latin square design, orthogonal design, nested design, repeated measures design, split-zone design, and uniform design, etc., and this embodiment is not limited to any particular scheme. It should also be noted that this embodiment uses historical process parameters to establish the set. Alternatively, the experimental design method described above can be used to formulate experimental design tables for vibration and sound. A fitting equation can be established using the experimental design table and the collected data. This fitting equation can then be used to predict vibration frequency and sound data, thereby enabling the calculation and analysis of more parameter combinations. This embodiment will not elaborate further on this. Simultaneously, machine learning models such as neural networks and deep learning can be established by collecting various types of data to further predict sound and vibration data. Those skilled in the art can obtain the corresponding results using the schemes described above; therefore, this embodiment will not elaborate further on this.

[0068] S103 determines whether the centrifugal atomizer spindle is malfunctioning by using vibration calibration sets and sound calibration sets.

[0069] In this embodiment, a threshold-based method is used for judgment. This step specifically includes the following steps: When the centrifugal atomizer spindle operates under predetermined process parameters, real-time vibration and sound data are collected, and the collected data is preprocessed. The vibration and sound data under the predetermined parameters in the vibration and sound calibration sets are compared with the real-time collected vibration and sound data. If a predetermined vibration or sound threshold is exceeded, the centrifugal atomizer stops operating. In this embodiment, comparing the calibration sets with the preprocessed data effectively determines the operating status. Simultaneously, by setting vibration and sound thresholds, the degree of abnormality is determined. However, simply using conventional threshold judgment cannot diagnose specific abnormalities, such as the degree of spindle abnormality or the number of blocked atomizing discs, and misjudgments may also occur. Therefore, this case further adopts the following scheme for threshold calculation:

[0070] The formula for obtaining the slurry output frequency of the centrifugal atomizer's atomizing disc is as follows:

[0071]

[0072] In the formula, A represents the number of holes in the atomizing disc, and B represents the spindle speed of the centrifugal atomizer. The calculation principle of the above formula originates from the calculation method of blade passage frequency. From the working principle perspective, centrifugal atomizers and vane pumps are similar. Therefore, this case proposes to use the calculation method of vane pump blade passage frequency to quantify the slurry output frequency of the centrifugal atomizer. A calibration ratio relationship is established by using vibration data and sound data of the centrifugal atomizer spindle under different process parameters during normal operation.

[0073]

[0074] or

[0075]

[0076] Among them, C i D is the normal vibration scaling factor under the i-th process parameter. j X is the normal sound scaling factor under the j-th process parameter. i To collect vibration data of the centrifugal atomizer spindle under the i-th process parameter during normal operation, G j The data collected is the sound data of the centrifugal atomizer spindle under the i-th process parameter during normal operation. Further explanation is needed: in this case, it was found that the amplitude of vibration or sound data increases exponentially when the spindle malfunctions. Therefore, a proportional relationship can be used to establish the relationship between the two. It should be noted that the slurry output frequency is at its peak when the atomizing disc is not clogged, but when the atomizing disc is clogged, the slurry output frequency will inevitably decrease, assuming other parameters remain constant. Furthermore, when the spindle malfunctions, the collected vibration and sound data increase exponentially again. Therefore, it can be understood that the two are inversely proportional. Thus, the above proportional formula is derived from the observation and summarization of the working principle.

[0077] From the above three equations, we can determine the number of holes in the atomizing disc under a certain process parameter:

[0078]

[0079] or

[0080]

[0081] Where, x i To collect vibration data of the centrifugal atomizer spindle during operation under the i-th process parameter, g iLet be the sound data collected when the centrifugal atomizer spindle is working under the i-th process parameter, and let a and b be the theoretical number of holes collected when the centrifugal atomizer spindle is working under the i-th process parameter. It should be understood that the formulas for a and b above are calculated by rounding up to ensure that the number of blocked holes can be calculated accurately. It should also be understood that the number of blocked holes is normally an integer, but it is possible that only half of the hole is blocked. Generally, this happens when the holes in the atomizing disc are small. Therefore, for smaller holes, the rounding up method may not be used.

[0082] The theoretical number of blocked holes in the current atomizing disc is calculated using the value of |Aa| or |Ab|. When |Aa| or |Ab| is greater than 1, the number of blocked holes in the current atomizing disc is greater than 1. It's important to understand that because the above steps use a rounding-up approach, and vibration and sound conditions are complex, an absolute value approach is used here for better judgment of the results, which helps in identifying abnormal states. While the number of blocked holes is normally an integer, it's possible for only half a hole to be blocked. This usually occurs when the atomizing disc holes are small. Therefore, for smaller holes, rounding up may not be used, resulting in decimals in this step. For this situation, rounding is generally used. A value less than 0.5 generally won't significantly affect the spindle's operation, while a value greater than 0.5, due to the small hole size, may indicate an abnormality and requires operator attention.

[0083] Furthermore, since atomizing disc blockage typically occurs during the production process, and interruptions can lead to significant losses, the above technical solution includes an analysis method to determine the number of blocked atomizing disc holes. This means that if the number of blocked holes is small and unlikely to cause significant damage to the spindle, the blockage can be cleared after production is completed. However, if the number of blocked holes is large and could easily cause significant damage to the spindle, production must be stopped immediately. Furthermore, since the working principle of a centrifugal atomizer is similar to that of a water pump or fan, its theoretical slurry output frequency can be easily calculated. An abnormality will result in vibrations at a higher amplitude than the theoretical slurry output frequency. Furthermore, a proportional relationship can be established between the slurry output frequency and the collected data. Under abnormal conditions, the amplitudes of the collected vibration and sound data will be several times higher than those under normal operating conditions. Therefore, the number of blocked holes can be calculated using this proportional relationship, and the number of blocked holes can be used to determine whether production should be stopped. Through multiple experiments, the results obtained by this calculation method are relatively accurate. However, compared to directly dividing the collected data with normal data to obtain the magnification, this method can produce significant deviations due to differences in the number of holes, shaft speed, reinforced parts, and processing methods of different atomizers. After multiple tests, the accuracy of this technical solution exceeded 95%.

[0084] According to another aspect of the present invention, a device for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate is provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the method for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any of the preceding claims.

[0085] According to another aspect of the present invention, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the method for detecting clogging of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any of the preceding claims.

[0086] The above description is only a part of the embodiments of the present invention and does not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made based on the content of the present invention specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate, characterized in that, include: Obtain vibration and sound data of the centrifugal atomizer spindle under different process parameters for normal operation; Vibration calibration sets and sound calibration sets under different process parameters are established using vibration and sound data. The vibration calibration set and sound calibration set are used to determine whether there is any abnormality in the operation of the centrifugal atomizer spindle. Obtain vibration and sound data of the centrifugal atomizer spindle under different process parameters during normal operation, including: An even number of vibration sensors and several sound sensors are arranged on the side of the atomizing disk with the axis of the centrifugal atomizer as the center; the atomizing disk includes several holes; Calibrate the vibration sensor and the sound sensor; Preprocessed data is collected using calibrated vibration and sound sensors; Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are preprocessed using preprocessed data. After preprocessing, vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are obtained. The vibration calibration set and sound calibration set are used to determine whether there are any abnormalities in the operation of the centrifugal atomizer spindle, including: When the centrifugal atomizer spindle is working under predetermined process parameters, it collects real-time vibration data and sound data, and preprocesses the collected data. The vibration data and sound data under the predetermined parameters in the vibration calibration set and sound calibration set are compared with the real-time collected vibration data and sound data. If the predetermined vibration threshold or predetermined sound threshold is exceeded, the centrifugal atomizer stops working. The vibration data includes axial vibration, radial vibration, and liquid output frequency vibration generated by 2× rotation speed frequency. If the predetermined vibration threshold or predetermined sound threshold is exceeded, the centrifugal nebulizer will stop operating, including: The formula for obtaining the slurry output frequency of the centrifugal atomizer's atomizing disc is as follows: In the formula, A is the number of holes in the atomizing disc, and B is the spindle speed of the centrifugal atomizer; A calibration ratio relationship was established using vibration and sound data from the normal operation of the centrifugal atomizer spindle under different process parameters. or Among them, C i D is the normal vibration scaling factor under the i-th process parameter. j X is the normal sound scaling factor under the j-th process parameter. i To collect vibration data of the centrifugal atomizer spindle under the i-th process parameter during normal operation, G j The sound data of the centrifugal atomizer spindle is collected under the i-th process parameter to ensure normal operation of the centrifugal atomizer spindle. From the above three equations, we can determine the number of holes in the atomizing disc under a certain process parameter: or Where, x i To collect vibration data of the centrifugal atomizer spindle during operation under the i-th process parameter, g i Let a and b be the sound data collected when the centrifugal atomizer spindle is working under the i-th process parameter, and a and b be the theoretical number of holes collected when the centrifugal atomizer spindle is working under the i-th process parameter. The theoretical number of blocked holes in the current atomizing disc can be obtained by calculating the value of |Aa| or |Ab|. When |Aa| or |Ab| is greater than 1, the number of blocked holes in the current atomizing disc is greater than 1.

2. The method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate as described in claim 1, characterized in that, The vibration sensor and sound sensor are calibrated, specifically: Vibration and sound data are collected when the main shaft of the centrifugal atomizer stops working, using vibration and sound sensors. Vibration and sound data when the centrifugal atomizer spindle stops working are used as calibration data as calibration parameters for the vibration and sound sensors.

3. The method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate as described in claim 1, characterized in that, Preprocessed data was collected using calibrated vibration and sound sensors, including: Vibration and sound data of the centrifugal atomizer spindle during idling under different process parameters are collected using vibration and sound sensors.

4. The method for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate as described in claim 3, characterized in that, Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are preprocessed using preprocessed data, including: Vibration and sound data of the centrifugal atomizer spindle rotating only under different process parameters are used as background data. Vibration and sound data of the centrifugal atomizer spindle operating normally under different process parameters are used to obtain preprocessed data after subtracting the background data.

5. A device for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate, characterized in that, Based on the method according to any one of claims 1-4, it includes: The acquisition module, construction module, and judgment module are connected in sequence. The acquisition module is used to acquire vibration data and sound data of the centrifugal atomizer spindle during normal operation under different process parameters. The construction module is used to establish vibration calibration sets and sound calibration sets under different process parameters using vibration data and sound data; The judgment module is used to determine whether the operation of the centrifugal atomizer spindle is abnormal by using the vibration calibration set and the sound calibration set.

6. A device for detecting blockage of the atomizing disc in a centrifugal atomizer for lithium iron phosphate, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the method for detecting blockage of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for detecting blockage of the atomizing disc of a centrifugal atomizer for lithium iron phosphate as described in any one of claims 1 to 4.

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