CN115683007B - Soft measurement method for abrasion of impeller of flotation equipment - Google Patents
Soft measurement method for abrasion of impeller of flotation equipment Download PDFInfo
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- CN115683007B CN115683007B CN202310005146.4A CN202310005146A CN115683007B CN 115683007 B CN115683007 B CN 115683007B CN 202310005146 A CN202310005146 A CN 202310005146A CN 115683007 B CN115683007 B CN 115683007B
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Abstract
The invention provides a soft measurement method for abrasion of an impeller of flotation equipment, which comprises the following steps: establishing a finite element analysis model of the impeller-shafting, and calculating to obtain the vibration acceleration amplitude of the impeller-shafting under the natural frequency; confirming whether to trigger an impeller abrasion pre-alarm or not based on the vibration acceleration amplitude; and after triggering an impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the apparent pattern of the flotation equipment is turned over and whether the current of the motor is reduced as judgment conditions. The soft measurement method for the abrasion of the impeller of the flotation equipment, provided by the invention, has the advantages that the abrasion of the impeller is not required to be observed through maintenance, the implementation is easy, the cost is low, the abrasion of the impeller can be effectively detected, and the measurement process is stable and reliable.
Description
Technical Field
The invention relates to the technical field of impeller abrasion detection, in particular to a soft measurement method for the abrasion of an impeller of flotation equipment.
Background
The impeller is the most main wearing part of the flotation equipment, a large amount of flotation equipment needs to be replaced with new intact impellers every year, the consumption of wearing parts is huge, and for a large-scale ore dressing plant, the replacement of wearing parts is also closely related to the shutdown maintenance time of the ore dressing plant, the plan of spare parts and other operation maintenance management. At present, the method of manual observation and periodic replacement is mainly adopted for the worn impeller, the timeliness is poor, scientific basis is not provided, and the maximum efficiency of the impeller cannot be exerted. The deterioration rates of the impellers under different working conditions are different, so that the impellers are replaced before being completely worn, resource waste is caused, or excessive wear still runs, and plant selection indexes are influenced. With the continuous development of the large-scale flotation equipment, the economic loss caused by the large-scale flotation equipment is more obvious. Therefore, an effective impeller abrasion detection method is formed, technical support can be provided for the modernization and intellectualization of the management of the wearing parts, and the method has important significance for adapting to the energy conservation and emission reduction requirements of a concentrating mill and improving the economic benefit.
In order to solve the problem that the impeller is difficult to monitor the abrasion loss, although some researches are carried out on the measurement method in the prior art, the measurement method still has defects. For example, the impeller lining rubber layers are made of different colors, although the abrasion degree can be distinguished, the impeller lining rubber layers still depend on the overhauling frequency seriously, and the problem of inconvenient observation is difficult to solve. Although the observation problem can be solved by adopting the contact type measurement mode of the embedded sensor, the problems that the installation space of the sensor is limited, signals can only depend on wireless transmission and the like are brought, and certain difficulty exists in implementation.
Disclosure of Invention
The invention aims to provide a soft measurement method for impeller abrasion of flotation equipment, which can solve the problems that the impeller abrasion is inconvenient to observe and the measurement mode is difficult to implement in the prior art.
The invention provides a soft measurement method for abrasion of an impeller of flotation equipment, which comprises the following steps:
establishing a finite element analysis model of an impeller-shafting, and calculating to obtain the vibration acceleration amplitude of the impeller-shafting under the natural frequency;
confirming whether to trigger an impeller abrasion pre-alarm or not based on the vibration acceleration amplitude;
and after triggering an impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the apparent pattern of the flotation equipment is turned over and whether the current of the motor is reduced as judgment conditions.
According to the soft measurement method for the abrasion of the impeller of the flotation equipment, after the impeller abrasion pre-alarm is triggered, whether the appearance of the flotation equipment is turned over and whether the current of a motor is reduced are taken as judgment conditions to confirm whether the impeller outputs an abrasion alarm signal, and the method specifically comprises the following steps:
when the flotation equipment has no pattern and the current of the motor is not reduced, confirming that the impeller does not output a wear alarm signal;
when the flotation equipment is subjected to apparent turnover and the current of the motor is not reduced, determining that the impeller does not output a wear alarm signal;
when the flotation equipment has no pattern and the current of the motor is reduced, confirming that the impeller does not output a wear alarm signal;
and when the flotation equipment is subjected to apparent turnover and the current of the motor is reduced, confirming that the impeller outputs a wear alarm signal.
According to the soft measurement method for the impeller wear of the flotation equipment, whether an impeller wear pre-alarm is triggered or not is confirmed based on the vibration acceleration amplitude, and the method specifically comprises the following steps:
counting in production data, and determining an impeller abrasion severity alarm threshold value based on the distribution of the measured values of the vibration acceleration of a plurality of seriously damaged impellers;
when the vibration acceleration value of the impeller-shafting under the natural frequency is smaller than the impeller abrasion severity alarm threshold value, not triggering the impeller abrasion pre-alarm;
and triggering an impeller abrasion pre-alarm when the vibration acceleration value of the impeller-shafting under the natural frequency is greater than or equal to the impeller abrasion severity alarm threshold value.
According to the soft measurement method for the abrasion of the impeller of the flotation equipment, which is provided by the invention, the establishment of a finite element analysis model of an impeller-shaft system and the calculation of the vibration acceleration amplitude of the impeller-shaft system under the natural frequency comprise the following steps:
calculating and obtaining the natural frequency of the impeller-shaft system based on the finite element analysis model;
drawing a vibration frequency spectrum diagram about the flotation equipment;
and finding out the vibration acceleration amplitude corresponding to the natural frequency on the abscissa in the vibration frequency spectrogram.
According to the soft measurement method for the impeller wear of the flotation equipment, provided by the invention, the natural frequency of the impeller-shaft system is obtained through calculation based on the finite element analysis model, and the method specifically comprises the following steps:
inputting spindle parameters and impeller parameters to the finite element analysis model, wherein the spindle parameters comprise spindle diameter, spindle length and spindle material, and the impeller parameters comprise impeller diameter, blade number and impeller material;
and analyzing and calculating the finite element analysis model to obtain the natural frequency of the impeller-shaft system.
According to the soft measurement method for the abrasion of the impeller of the flotation equipment, provided by the invention, the drawing of the vibration frequency spectrum diagram of the flotation equipment specifically comprises the following steps:
a first acceleration vibration sensor is arranged at the top of a shaft system of the flotation equipment;
collecting detection signal data of the first acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a first vibration frequency spectrogram;
and analyzing and processing the first vibration spectrogram to obtain the vibration spectrogram of the flotation equipment.
According to the soft measurement method for the impeller wear of the flotation equipment, provided by the invention, the analysis processing of the first vibration spectrogram specifically comprises the following steps:
a second acceleration vibration sensor is arranged on the motor base;
collecting detection signal data of the second acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a second vibration frequency spectrogram;
comparing and analyzing the first vibration spectrogram and the second vibration spectrogram to determine whether the first vibration spectrogram has misjudgment;
and if the first vibration spectrogram does not have misjudgment, determining that the first vibration spectrogram is the vibration spectrogram of the flotation equipment.
According to the soft measurement method for the abrasion of the impeller of the flotation equipment, provided by the invention, whether the apparent pattern of the flotation equipment is turned over is judged, and the method specifically comprises the following steps:
installing a froth imager on a pedal platform of the flotation equipment, and collecting flotation surface froth images;
the froth imager detects and identifies whether the flotation machine is turned over according to the deep learning classification algorithm of the flotation surface froth image;
and when the surface layer of the flotation equipment is detected and identified to be turned, the foam imager outputs a turning alarm signal to the upper computer software.
According to the soft measurement method for the abrasion of the impeller of the flotation equipment, provided by the invention, whether the current of the motor is reduced is judged, and the method specifically comprises the following steps:
collecting the current of a motor in real time through a current transformer;
when the collected motor current is larger than or equal to the normal operation current of the flotation machine, judging that the motor current is not reduced;
and when the collected motor current is smaller than the normal operation current of the flotation machine, judging that the motor current is reduced.
Wherein the normal operation current of the flotation machine is 72 to 75 percent of the rated current of the motor.
According to the soft measurement method for the impeller wear of the flotation equipment, provided by the invention, the method further comprises the following steps: establishing a rule table for detecting impeller abrasion, respectively taking whether to trigger an impeller abrasion pre-alarm, whether to turn over the flotation equipment appearance and whether to reduce the motor current as three input factors of the rule table, and taking whether to output an impeller abrasion alarm signal as an output factor of the rule table.
The invention provides a soft measurement method for impeller abrasion of flotation equipment, which comprises the steps of calculating and obtaining a vibration acceleration amplitude of an impeller-shafting under a natural frequency by establishing a finite element analysis model of the impeller-shafting; confirming whether to trigger an impeller abrasion pre-alarm or not based on the vibration acceleration amplitude; after triggering an impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the apparent of the flotation equipment is turned over and whether the current of the motor is reduced as judgment conditions; namely, the method takes the vibration acceleration amplitude of the impeller-shafting under the natural frequency as a main basis for judging the abrasion of the impeller, and takes whether the appearance of the flotation equipment is turned and whether the current of the motor is reduced as an auxiliary judgment basis for improving the soft measurement accuracy of the abrasion of the impeller, thereby detecting and confirming whether the impeller is abraded. Therefore, the soft measurement method for the abrasion of the impeller of the flotation equipment does not need to observe the abrasion of the impeller through maintenance, is easy to implement, has low cost, can effectively detect the abrasion of the impeller, and has stable and reliable measurement process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the soft measurement method for the impeller wear of the flotation equipment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the soft measurement method for the abrasion of the impeller of the flotation equipment in the embodiment of the invention specifically includes the following steps:
and establishing a finite element analysis model of the impeller-shaft system, and calculating to obtain the vibration acceleration amplitude of the impeller-shaft system under the natural frequency.
And confirming whether to trigger an impeller abrasion pre-alarm or not based on the vibration acceleration amplitude.
And after triggering an impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the flotation equipment is subjected to surface turnover and whether the motor current is reduced as judgment conditions.
According to the same working condition, the coupling frequency of the impeller shaft system with serious abrasion degree is not greatly different from that of the normal impeller shaft system, but the corresponding vibration acceleration amplitude is deviated to a certain extent, and the more serious the impeller is abraded, the larger the corresponding vibration acceleration amplitude is. Therefore, according to the soft measurement method for the impeller wear of the flotation equipment, the vibration acceleration amplitude of the impeller-shaft system under the natural frequency is used as a main basis for judging the impeller wear, in order to improve the soft measurement accuracy of the impeller wear, whether the appearance of the flotation equipment is turned over and whether the motor current is reduced are used as auxiliary judgment basis, and whether the impeller is worn or not is detected and confirmed. Therefore, by adopting the soft measurement method for the abrasion of the impeller of the flotation equipment, the abrasion of the impeller is not required to be observed through maintenance, the method is easy to implement, the cost is low, the abrasion of the impeller can be effectively detected, and the measurement process is stable and reliable.
Further, after triggering the impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the flotation equipment is over-patterned and whether the motor current is reduced as judgment conditions, and specifically comprising the following steps:
and when the flotation equipment has no pattern and the current of the motor is not reduced, confirming that the impeller does not output a wear alarm signal.
And when the flotation equipment is subjected to apparent turnover and the current of the motor is not reduced, confirming that the impeller does not output a wear alarm signal.
And when the flotation equipment has no pattern and the current of the motor is reduced, confirming that the impeller does not output a wear alarm signal.
And when the flotation equipment is subjected to apparent turnover and the current of the motor is reduced, confirming that the impeller outputs a wear alarm signal.
Specifically, whether an impeller abrasion pre-alarm is triggered or not is confirmed based on the vibration acceleration amplitude, and the method specifically comprises the following steps:
and carrying out statistics in the production data, and determining an impeller abrasion severity alarm threshold value based on the distribution of the measured values of the vibration acceleration of the plurality of seriously-damaged impellers.
When the vibration acceleration value of the impeller-shafting under the natural frequency is smaller than the impeller abrasion severity alarm threshold value, the impeller abrasion pre-alarm is not triggered.
And when the vibration acceleration value of the impeller-shafting under the natural frequency is greater than or equal to the impeller abrasion severity alarm threshold value, triggering an impeller abrasion pre-alarm.
Specifically, the method comprises the following steps of establishing a finite element analysis model of the impeller-shaft system, and calculating and obtaining the vibration acceleration amplitude of the impeller-shaft system under the natural frequency:
and calculating and obtaining the natural frequency of the impeller-shafting based on a finite element analysis model.
A graph of the vibration spectrum for the flotation plant is plotted.
And finding out the vibration acceleration amplitude corresponding to the natural frequency on the abscissa in the vibration spectrogram.
The natural frequency of the impeller is a structural inherent characteristic, and is only related to the mass and the rigidity of the impeller structure and is not related to external influence. The external disturbance can only affect the vibration amplitude of the impeller, but cannot change the natural frequency of the impeller, and if the natural frequency of the impeller is changed, only the mass or the rigidity of the impeller structure can be changed. The natural frequency is an important index of the dynamic performance of the structure and can be quantitatively described by a set of modal parameters.
Because the impeller is directly connected with the bearing, the embodiment of the invention integrates the impeller and the shaft system into a whole and establishes a finite element analysis model of the impeller-shaft system. Wherein the shaft system can be constructed by beam units, and an interface is given according to the actual size; the impeller may be constructed using solid cell meshing.
Specifically, the method for obtaining the natural frequency of the impeller-shaft system based on the finite element analysis model calculation of the impeller-shaft system comprises the following steps:
and inputting spindle parameters and impeller parameters to the finite element analysis model, wherein the spindle parameters comprise the diameter of the spindle, the length of the spindle and the material of the spindle, and the impeller parameters comprise the diameter of the impeller, the number of blades and the material of the impeller. And then, after the finite element analysis model is analyzed and calculated, the natural frequency of the impeller-shaft system can be obtained.
Further, drawing a vibration frequency spectrum diagram of the flotation equipment specifically comprises the following steps:
a first acceleration vibration sensor is installed at the top of a shaft system of the flotation equipment and used for realizing vibration monitoring of an impeller in an ore pulp area, and the vibration of the impeller can be transmitted to a detection area of the first acceleration vibration sensor through a directly connected main shaft.
And collecting detection signal data of the first acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a first vibration frequency spectrogram. When the detection signal data are collected, 500 times can be collected every second, then 4 seconds of data are collected, and in total 2000 data are subjected to Fourier transform, so that a first vibration spectrogram is drawn.
And analyzing and processing the first vibration spectrogram to obtain the vibration spectrogram of the flotation equipment.
The method for analyzing and processing the first vibration spectrogram specifically comprises the following steps of:
and a second acceleration vibration sensor is arranged on the motor base and used for realizing vibration monitoring at the motor end.
And collecting detection signal data of the second acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a second vibration frequency spectrogram.
And then comparing and analyzing the first vibration spectrogram and the second vibration spectrogram to determine whether the first vibration spectrogram has misjudgment. Because the vibration signal at the motor end easily causes interference to the vibration of the impeller, and the interference may cause the misjudgment of the vibration frequency spectrum of the impeller, whether the misjudgment exists in the first vibration frequency spectrum diagram can be determined through the comparison analysis of the first vibration frequency spectrum diagram and the second vibration frequency spectrum diagram, so that the detection accuracy is improved.
When it is determined that the first vibration spectrogram does not have a misjudgment, the first vibration spectrogram can be determined to be the vibration spectrogram of the flotation equipment.
Further, in the soft measurement method for the abrasion of the impeller of the flotation equipment in the embodiment of the present invention, whether the apparent pattern of the flotation equipment is turned over is judged, which specifically includes the following steps:
and a froth imager is arranged on a pedal platform of the flotation equipment and used for collecting flotation surface froth images.
The froth imager can detect and identify whether the flotation machine has the problem of the turnover according to the deep learning classification algorithm of the flotation surface froth image.
When the surface layer of the flotation equipment is detected and identified to be turned into the flowers, the foam imager outputs a flower turning alarm signal to the upper computer software.
Further, in the soft measurement method for the abrasion of the impeller of the flotation equipment, which is provided by the embodiment of the invention, whether the current of the motor is reduced or not is judged, and the method specifically comprises the following steps:
the motor current is collected in real time through the current transformer and is used for obtaining the magnitude of the motor current, and detection data are transmitted to the upper computer software in real time.
And when the collected motor current is larger than or equal to the normal running current of the flotation machine, judging that the motor current is not reduced.
And when the collected motor current is smaller than the normal operation current of the flotation machine, judging that the motor current is reduced.
The normal operation current of the flotation machine is 72-75% of the rated current of the motor, so that under the condition that the external condition is normal, if the collected motor current is lower than 72% of the rated current of the motor, the motor current can be considered to be reduced.
Further, the soft measurement method for the abrasion of the impeller of the flotation equipment in the embodiment of the invention further comprises the following steps:
as shown in table 1 below, a rule table for detecting impeller wear is established, whether to trigger an impeller wear pre-alarm, whether to cause the flotation equipment to apparently turn over and whether to cause the motor current to decrease are respectively used as three input factors of the rule table, and whether to output an impeller wear alarm signal is used as an output factor of the rule table.
TABLE 1
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A soft measurement method for abrasion of an impeller of flotation equipment is characterized by comprising the following steps:
establishing a finite element analysis model of an impeller-shaft system, and calculating to obtain the vibration acceleration amplitude of the impeller-shaft system under the natural frequency;
confirming whether to trigger an impeller abrasion pre-alarm or not based on the vibration acceleration amplitude;
after triggering an impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the apparent of the flotation equipment is turned over and whether the current of the motor is reduced as judgment conditions;
after triggering impeller abrasion pre-alarm, determining whether the impeller outputs an abrasion alarm signal by taking whether the apparent of the flotation equipment is turned and whether the current of the motor is reduced as judgment conditions and specifically comprising the following steps of:
when the flotation equipment has no pattern and the current of the motor is not reduced, confirming that the impeller does not output a wear alarm signal;
when the flotation equipment is subjected to apparent turnover and the current of the motor is not reduced, confirming that the impeller does not output a wear alarm signal;
when the flotation equipment has no pattern and the current of the motor is reduced, confirming that the impeller does not output a wear alarm signal;
when the flotation equipment is subjected to apparent pattern turning and the current of the motor is reduced, confirming that the impeller outputs a wear alarm signal;
the establishing of the finite element analysis model of the impeller-shaft system and the calculation of the vibration acceleration amplitude of the impeller-shaft system under the natural frequency specifically comprise the following steps:
calculating and obtaining the natural frequency of the impeller-shaft system based on the finite element analysis model;
drawing a vibration frequency spectrum diagram about the flotation equipment;
finding out a vibration acceleration amplitude corresponding to the natural frequency on the abscissa in the vibration frequency spectrogram;
the drawing of the vibration spectrogram about the flotation equipment specifically comprises the following steps:
a first acceleration vibration sensor is arranged at the top of a shaft system of the flotation equipment;
collecting detection signal data of the first acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a first vibration frequency spectrogram;
analyzing and processing the first vibration spectrogram to obtain a vibration spectrogram of the flotation equipment;
the analyzing the first vibration spectrogram specifically includes:
a second acceleration vibration sensor is arranged on the motor base;
collecting detection signal data of the second acceleration vibration sensor, performing Fourier transform on the collected detection signal data, and drawing to generate a second vibration frequency spectrogram;
comparing and analyzing the first vibration spectrogram and the second vibration spectrogram to determine whether the first vibration spectrogram has misjudgment;
and if the first vibration spectrogram does not have misjudgment, determining that the first vibration spectrogram is the vibration spectrogram of the flotation equipment.
2. The soft measurement method for the impeller wear of the flotation equipment according to claim 1, wherein the confirming whether to trigger an impeller wear pre-alarm based on the vibration acceleration amplitude specifically comprises:
counting is carried out in production data, and an impeller abrasion severity alarm threshold value is determined based on the distribution of the measured values of the vibration acceleration of a plurality of seriously damaged impellers;
when the vibration acceleration value of the impeller-shafting under the natural frequency is smaller than the impeller abrasion severity alarm threshold value, not triggering the impeller abrasion pre-alarm;
and triggering an impeller abrasion pre-alarm when the vibration acceleration value of the impeller-shafting under the natural frequency is greater than or equal to the impeller abrasion severity alarm threshold value.
3. The soft measurement method for the impeller wear of the flotation equipment according to claim 1, wherein the obtaining of the natural frequency of the impeller-shaft system based on the finite element analysis model calculation specifically comprises:
inputting spindle parameters and impeller parameters to the finite element analysis model, wherein the spindle parameters comprise spindle diameter, spindle length and spindle material, and the impeller parameters comprise impeller diameter, blade number and impeller material;
and analyzing and calculating the finite element analysis model to obtain the natural frequency of the impeller-shaft system.
4. The soft measurement method for the impeller wear of the flotation equipment according to claim 1, wherein judging whether the flotation equipment is over-patterned or not specifically comprises:
installing a froth imager on a pedal platform of the flotation equipment, and collecting flotation surface froth images;
the froth imager detects and identifies whether the flotation machine is turned over according to the deep learning classification algorithm of the flotation surface froth image;
and when the surface layer of the flotation equipment is detected and identified, the foam imager outputs a turnover alarm signal to the upper computer software.
5. The soft measurement method for the impeller wear of the flotation equipment according to claim 1, wherein judging whether the motor current is reduced specifically comprises:
collecting the current of the motor in real time through a current transformer;
when the collected motor current is larger than or equal to the normal running current of the flotation machine, judging that the motor current is not reduced;
and when the collected motor current is smaller than the normal operation current of the flotation machine, judging that the motor current is reduced.
6. The flotation plant impeller wear soft measurement method of claim 1, further comprising: establishing a rule table for detecting impeller abrasion, respectively taking whether to trigger an impeller abrasion pre-alarm, whether to turn over the flotation equipment appearance and whether to reduce the motor current as three input factors of the rule table, and taking whether to output an impeller abrasion alarm signal as an output factor of the rule table.
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