CN115096362A - Motor stator slot wedge monitoring and analyzing method and device - Google Patents

Abstract

The invention discloses a method and a device for monitoring and analyzing a motor stator slot wedge. The method includes acquiring sensing data and state data of a motor; wherein the sensing data includes vibration data of a stator slot wedge of the motor and a key phase signal of the motor; determining the tightening state of the stator slot wedge according to the sensing data and the state data, Wherein, the tightening state includes at least one of vibration, health and remaining looseness; when it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued. The technical solution of the embodiment of the present invention realizes real-time monitoring and analysis of the state of the stator slot wedge, and achieves the effect of quickly and accurately testing the stator slot wedge.

Description

A kind of motor stator slot wedge monitoring and analysis method and device

technical field

The invention relates to the technical field of motors, and in particular, to a method and device for monitoring and analyzing a motor stator slot wedge.

Background technique

Electric motors are often used as drivers for various important auxiliary machines in power stations. The straight sections of the stator windings of the motor are usually fastened in the stator core slots by slot wedges and spacers.

During the operation of the motor, the stator slot wedge will bear various alternating electromagnetic forces from some stator bars in the core slot and the thermal expansion external force caused by the variable load. The tightness of the inner part will cause mechanical wear on the surface of the stator bar and discharge in the slot, which will destroy the main insulation of the motor stator under the action of electrical corrosion, accelerate the deterioration of the main insulation and even lead to motor operation accidents, thereby affecting the normal operation of important machines, and even This leads to machine outage, which seriously threatens the safe and stable operation of the power plant.

At present, when testing the stator slot wedge of the motor, the tightness of the stator slot wedge is detected by the manual percussion sound method or the electronic percussion displacement analysis method after the motor is stopped and the rotor is drawn. At this time, the motor is in a cold state, and the stator slot There is a big difference between the tightening degree of the wedge and the running process of the motor in the hot state, and the dynamic vibration of the stator slot wedge under the electromagnetic load of the wire bar cannot be simulated, and the vibration of the stator slot wedge cannot be accurately tested. In addition, this kind of method can only be carried out during the shutdown, and the repair plan can be formulated after the problem is found, and the looseness of the stator slot wedge cannot be quickly tested.

SUMMARY OF THE INVENTION

The invention provides a motor stator slot wedge monitoring and analysis method and device, so as to realize rapid and accurate testing of the vibration condition of the motor stator slot wedge.

According to an aspect of the present invention, a method for monitoring and analyzing a motor stator slot wedge is provided, and the method for monitoring and analyzing a motor stator slot wedge includes:

Acquiring sensing data and state data of the motor; wherein the sensing data includes vibration data of the stator wedges of the motor and key phase signals of the motor;

Determine a tightening state of the stator wedges according to the sensing data and the state data, wherein the tightening state includes at least one of a vibration condition, a degree of health, and a residual looseness;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued.

Optionally, acquire sensor data of the motor, including:

Acquire vibration data of multiple points on at least one of the stator slot wedges in each phase belt of the motor, and acquire key phase signals of the motor.

Optionally, the fastening state of the stator wedge is determined according to the sensing data and the state data, including at least one of the following:

Determine the vibration condition of the stator slot wedge according to the sensing data and the state data;

determining the health of the stator wedges according to the sensing data and the state data;

The remaining loose amount of the stator wedge is determined according to the sensing data and the state data.

Optionally, determining the vibration condition of the stator slot wedges according to the sensing data and the state data, including:

Determine the current power of the motor according to the state data, and determine the current frequency of the motor according to the key phase signal;

Determine the current vibration value of the stator slot wedge according to vibration data of multiple points on at least one of the stator slot wedges in each phase band of the motor;

When the current vibration value is greater than the preset vibration value corresponding to the current power and the current frequency, determine that the vibration of the stator slot wedge is abnormal;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including:

When the vibration of the stator slot wedge is abnormal, it is determined that the stator slot wedge is abnormal, and an alarm message is issued.

Optionally, determining the health of the stator slot wedges according to the sensing data and the state data, including:

Determine the maximum vibration value and the average vibration value of each of the stator slot wedges according to vibration data of multiple points on at least one of the stator slot wedges in each phase band of the motor;

When it is determined according to the state data that the current power of the motor remains unchanged, the difference between the maximum vibration value and the average vibration value is less than a first preset value, and when the maximum vibration value is less than a second preset value , determine that the health of the stator slot wedge is in a normal state;

As the motor running time changes, the maximum vibration value is greater than the second preset value, the rate of change of the maximum vibration value is greater than the third preset value, and the rate of change of the average vibration value is less than the fourth preset value When the value is , it is determined that the health of the stator slot wedge is in the state to be concerned;

With the change of the running time of the motor, when the rate of change of the maximum vibration value is less than the fifth preset value, and the rate of change of the average vibration value is greater than the sixth preset value, it is determined that the health of the stator wedge is abnormal state;

As the motor running time changes, the rate of change of the maximum vibration value is less than the seventh preset value, the rate of change of the average vibration value is greater than the eighth preset value, and the difference between the average vibration value and the maximum vibration value is The difference value is less than the ninth preset value, it is determined that the health of the stator slot wedge is in a serious abnormal state;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including:

When the health of the stator slot wedge is in the state to be concerned, the abnormal state or the serious abnormal state, an alarm message is issued.

Optionally, determining the health of the stator slot wedges according to the sensing data and the state data, including:

According to the vibration data of multiple points on at least one of the stator slot wedges in each phase belt of the motor, the over-frequency vibration value of each stator slot wedge is determined; wherein, the over-frequency vibration value is all vibration data The vector sum of the vibration amplitudes;

Determine the main frequency vibration component of the stator slot wedge according to the state data and the vibration data;

When the over-frequency vibration value is less than the tenth preset value, and the proportion of the main frequency vibration component in all frequency components is greater than the eleventh preset value, it is determined that the health of the stator wedge is in a normal state;

With the change of the running time of the motor, when the rate of change of the general frequency vibration value is greater than zero, and the rate of change of the proportion of the main frequency vibration component in all frequency components is less than zero, it is determined that the health of the stator slot wedge is in the range. pending status;

When the over-frequency vibration value is greater than the twelfth preset value, and the proportion of the main frequency vibration component in all frequency components is less than the thirteenth preset value, it is determined that the health of the stator wedge is in an abnormal state ;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including:

When the health of the stator slot wedge is in a concerned state or an abnormal state, an alarm message is issued.

Optionally, determining the health of the stator slot wedges according to the sensing data and the state data, including:

determining an average vibration value of each of the stator wedges according to vibration data of a plurality of points on at least one of the stator wedges in each phase band of the motor;

When it is determined according to the state data that the power of the motor remains unchanged, the rate of change of the average vibration value of the stator wedges is greater than the fourteenth preset value, and the rate of change of the temperature of the motor is determined according to the state data When it is greater than the fifteenth preset value, it is determined that the health degree of the stator slot wedge is in an abnormal state;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including:

When the health of the stator slot wedge is in an abnormal state, an alarm message is issued.

Optionally, determining the remaining looseness of the stator slot wedges according to the sensing data and the state data, including:

According to the vibration data of the stator slot wedge of the motor of the same model as the motor, the stator parameter and the loose amount, the corresponding relationship of the loose amount is established;

Determine the residual looseness of the stator slot wedge according to the current vibration data of the stator slot wedge, the current stator parameter in the state data and the corresponding relationship;

When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including:

When the residual looseness of the stator slot wedge is less than the preset looseness, an alarm message is issued.

According to another aspect of the present invention, a motor stator slot wedge monitoring and analysis device is provided, and the motor stator slot wedge monitoring and analysis device includes: a sensing module and a control module;

The sensing module is connected with the control module, and the sensing module is used to collect the sensing data of the motor and the state data of the motor; the control module is used to obtain the sensing data and state data of the motor; according to the The sensing data and the state data determine a tightening state of the stator wedge, wherein the tightening state includes at least one of a vibration condition, a degree of health, and a residual looseness; the tightening state is determined according to the tightening state. When the stator slot wedge is abnormal, an alarm message is issued; wherein, the sensing data includes vibration data of the stator slot wedge of the motor and the key phase signal of the motor.

Optionally, the sensing module includes a capacitive vibration sensor and an eddy current sensor;

The capacitive vibration sensor is arranged on the stator slot wedge in each phase band, and at least one of the capacitive vibration sensor is arranged in each phase band, and the capacitive vibration sensor is used to collect the multi-frequency characteristics of the stator slot wedge. vibration data of points;

The eddy current sensor is used to collect the key phase signal of the motor.

In the technical solution of the embodiment of the present invention, the fastening state of the stator slot wedge can be determined by acquiring the sensor data and state data of the motor. When determining whether the stator slot wedge is abnormal according to the fastening state, it can be determined according to the vibration condition, health and At least one of the remaining loose amounts is judged. When the abnormal vibration of the stator slot wedge is determined according to the vibration data, key phase signal and state data, it indicates that the stator slot wedge vibrates greatly, the stator slot wedge is loose, and the tightening state of the stator slot wedge is abnormal, so the abnormality of the stator slot wedge is determined.

The health degree of the stator slot wedge can also be determined according to the sensor data and the state data. When the health degree is abnormal, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge.

The residual looseness of the stator wedge can also be determined according to the sensor data and state data. When the residual looseness of the stator wedge is too small, it indicates that the stator wedge is too loose and the tightening state of the stator wedge is abnormal, so as to determine the stator wedge. abnormal. When it is judged that the stator slot wedge is abnormal, the control module will issue an alarm message to remind the staff to repair the stator slot wedge in time. Therefore, by collecting the vibration data of the stator slot wedge in real time, it is possible to determine whether the stator slot wedge is abnormal in real time, so as to achieve the effect of quickly testing the stator slot wedge. During normal operation, test the stator slot wedge to judge the tightening state of the stator slot wedge, which can test the stator slot wedge more accurately; the frequency of the motor can be determined according to the key phase signal, and the power of the motor can be determined according to the state data. Under the same power, the vibration change of the stator slot wedge can be observed, and the stator slot wedge can be tested more accurately. The technical solution of the embodiment of the present invention solves the problem that the state of the stator wedge cannot be detected quickly and accurately after the motor is stopped, realizes the real-time monitoring and analysis of the state of the stator wedge, and achieves a fast and accurate detection of the state of the stator wedge. Test the effect of stator wedges.

It should be understood that the content described in this section is not intended to identify key or critical features of the embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become readily understood from the following description.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a flowchart of a method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

2 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

3 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

4 is a schematic diagram of a vibration analysis result of a stator slot wedge provided by an embodiment of the present invention;

5 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

6 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

7 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention;

8 is a schematic structural diagram of a motor stator slot wedge monitoring and analysis device provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another motor stator slot wedge monitoring and analysis device provided by an embodiment of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or elements is not necessarily limited to those steps or elements expressly listed, Rather, other steps or units not expressly listed or inherent to the process, method, product or apparatus may be included.

FIG. 1 is a flowchart of a method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. As shown in FIG. 1 , the method includes:

S110. Acquire sensing data and state data of the motor; wherein the sensing data includes vibration data of the stator slot wedge of the motor and key phase signals of the motor.

Specifically, the sensor data and state data of the motor can be collected by sensors. For example, the vibration data of the stator slot wedge of the motor can be collected by a capacitive vibration sensor, and the key phase signal of the motor can be collected by an eddy current sensor. The control module can obtain the motor from the sensor. sensor data and status data.

Exemplarily, the motor is, for example, a drive machine of an auxiliary machine of a power plant, that is, a machine that provides assistance for the generator to generate power. The motor, for example, can drive a fan system and a water pump system in a heat dissipation system of the generator. The state data of the motor include, for example, the actual power of the generator set, the total fuel volume of the boiler, the main steam flow, and the total air volume, etc., as well as the flue gas flow, air pressure, air temperature, and damper opening of the fan system; The total flow, pressure, etc. of the water pump system also includes data such as motor stator current, stator current frequency, stator voltage, stator winding temperature, cold air temperature, and hot air temperature. According to the state data of the motor, it can be judged whether the running state of the motor is normal. When the running state of the motor is normal, the vibration data of the stator slot wedge of the motor can be analyzed to more accurately analyze the state of the stator slot wedge, so as to judge Looseness of the stator wedges.

The control module is, for example, an overall control system of a power station, and may also be other controllers, which are not limited in this embodiment.

S120. Determine the tightening state of the stator wedges according to the sensing data and the state data, wherein the tightening state includes at least one of vibration, health, and remaining looseness.

Specifically, the fastening state of the stator slot wedge is determined according to the sensing data and the state data, and it can be determined whether the stator slot wedge is loose, so as to determine whether the stator slot wedge is abnormal. When the tightening state is abnormal, it indicates that the stator slot wedge is loose, and it can be determined that the stator slot wedge is abnormal. The vibration of the stator slot wedge can be determined according to the sensor data and state data. When the vibration is abnormal, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge. The health degree of the stator slot wedge can also be determined according to the sensor data and the state data. When the health degree is abnormal, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge. The residual looseness of the stator wedge can also be determined according to the sensor data and state data. When the residual looseness of the stator wedge is too small, it indicates that the stator wedge is too loose and the tightening state of the stator wedge is abnormal, so as to determine the stator wedge. abnormal.

S130 , when it is determined that the stator slot wedge is abnormal according to the tightening state, an alarm message is issued.

Specifically, when it is determined whether the stator slot wedge is abnormal according to the tightening state, the judgment can be made according to at least one of the vibration condition, the health degree and the remaining loose amount. When the abnormal vibration of the stator slot wedge is determined according to the vibration data, key phase signal and state data, it indicates that the stator slot wedge vibrates greatly, the stator slot wedge is loose, and the tightening state of the stator slot wedge is abnormal, so the abnormality of the stator slot wedge is determined. The health degree of the stator slot wedge can also be determined according to the sensor data and the state data. When the health degree is abnormal, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge. The residual looseness of the stator wedge can also be determined according to the sensor data and state data. When the residual looseness of the stator wedge is too small, it indicates that the stator wedge is too loose and the tightening state of the stator wedge is abnormal, so as to determine the stator wedge. abnormal. When it is judged that the stator slot wedge is abnormal, the control module will issue an alarm message to remind the staff to repair the stator slot wedge in time. Therefore, by collecting the vibration data of the stator slot wedge in real time, it is possible to judge whether the stator slot wedge is abnormal in real time, realize the real-time monitoring and analysis of the state of the stator slot wedge, and achieve the effect of quickly testing the stator wedge; The data can determine the running state of the motor, test the stator slot wedge when the motor is running normally, and judge the fastening state of the stator slot wedge, which can test the stator slot wedge more accurately; according to the key phase signal, the frequency of the motor can be determined, according to the status data The power of the motor can be determined, the vibration change of the stator slot wedge can be observed under the same frequency and the same power, and the stator slot wedge can be tested more accurately.

In addition, when the vibration is serious, or the health is in a state that needs attention, or the looseness of the stator slot wedge is small, an alarm message is issued, that is, before the stator wedge is completely loosened, the staff can be reminded to repair, and the operation of the motor can be predicted in advance. The looseness of the stator slot wedge during the process, so as to avoid the motor running accident caused by the complete loosening of the stator slot wedge.

In the technical solution of this embodiment, by acquiring the sensor data and state data of the motor, the tightening state of the stator slot wedge can be determined. At least one of the amount of looseness is judged. When the abnormal vibration of the stator slot wedge is determined according to the vibration data, key phase signal and state data, it indicates that the stator slot wedge vibrates greatly, the stator slot wedge is loose, and the tightening state of the stator slot wedge is abnormal, so the abnormality of the stator slot wedge is determined. The health degree of the stator slot wedge can also be determined according to the sensor data and the state data. When the health degree is abnormal, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge. The residual looseness of the stator wedge can also be determined according to the sensor data and state data. When the residual looseness of the stator wedge is too small, it indicates that the stator wedge is too loose and the tightening state of the stator wedge is abnormal, so as to determine the stator wedge. abnormal. When it is judged that the stator slot wedge is abnormal, the control module will issue an alarm message to remind the staff to repair the stator slot wedge in time. Therefore, by collecting the vibration data of the stator slot wedge in real time, it is possible to determine whether the stator slot wedge is abnormal in real time, so as to achieve the effect of quickly testing the stator slot wedge. During normal operation, test the stator slot wedge to judge the tightening state of the stator slot wedge, which can test the stator slot wedge more accurately; the frequency of the motor can be determined according to the key phase signal, and the power of the motor can be determined according to the state data. Under the same power, the vibration change of the stator slot wedge can be observed, and the stator slot wedge can be tested more accurately. The technical solution of this embodiment solves the problem that the state of the stator wedge cannot be detected quickly and accurately after the motor is stopped, realizes real-time monitoring and analysis of the state of the stator wedge, and achieves a fast and accurate test Effect of stator wedges. In addition, the technical solution of this embodiment does not require the motor to stop for detection, and can quickly and accurately detect the state of the stator slot wedge during the operation of the motor. When the stator slot wedge is abnormal, it can be stopped in time for maintenance, which can avoid damage to the motor or other machines. .

On the basis of the above technical solution, optionally, S120 determines the tightening state of the stator slot wedge according to the sensing data and the state data, including at least one of the following: determining the vibration of the stator slot wedge according to the sensing data and the state data situation; determine the health of the stator wedges according to the sensing data and state data; determine the remaining looseness of the stator wedges according to the sensing data and state data.

Exemplarily, when it is determined according to the state data that the motor is running normally, the sensing data includes the vibration data of the stator slot wedge and the key phase signal of the motor, the current frequency of the motor can be determined through the key phase signal, and the current frequency corresponding to the stator slot wedge By comparing the vibration data with the preset vibration data corresponding to the current frequency, it is possible to determine whether the vibration of the stator wedge is abnormal; therefore, by collecting the vibration data of the stator wedge in real time, we can determine whether the vibration of the stator wedge is abnormal in real time, so as to quickly test the stator. In addition, combined with the key phase signal and state data of the motor, the vibration of the stator slot wedge can be judged, and the stator slot wedge can be tested more accurately.

When it is determined that the motor is running normally according to the state data, the health of the stator wedge can be determined according to the vibration data of the stator wedge, for example, to determine whether the health of the stator wedge is in a normal state, an abnormal state, or a serious abnormal state. Therefore, by real-time Collecting the vibration data of the stator wedge can judge the health of the stator wedge in real time, so as to judge whether the looseness of the stator wedge is abnormal in real time, and achieve the effect of quickly testing the stator wedge; By judging the health of the stator slot wedge, the stator slot wedge can be tested more accurately.

When it is determined that the motor is running normally according to the status data, the current frequency of the motor can be determined according to the key phase signal, the current stator parameters in the motor can be determined according to the status data, and the remaining looseness of the stator slot wedge can be determined according to the current frequency, current stator parameters and current vibration data. ;The looseness of the stator wedge can be judged according to the remaining looseness; the looseness of the stator wedge can be judged in real time by collecting the vibration data of the stator wedge in real time, so as to achieve the effect of rapid testing of the stator wedge; and, combined with the key phase signal of the motor And state data, determine the looseness of the stator slot wedge, can test the stator slot wedge more accurately.

FIG. 2 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. Optionally, referring to FIG. 2 , the motor stator slot wedge monitoring and analysis method includes:

S210: Acquire vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, acquire key phase signals of the motor, and acquire state data of the motor.

Specifically, if the motor is, for example, a three-phase motor, the motor includes three phase belts, and at least one vibration sensor is arranged in each phase belt of the motor, and the vibration sensor is arranged on the stator slot wedge. , the vibration data of multiple points on the stator slot wedge can be collected; the control module can obtain the vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor from the vibration sensor, and then the multiple parts of the stator slot wedge can be measured. detection, thereby improving the accuracy of the stator wedge test. In addition, the control module can obtain the key-phase signal and state data of the motor, and comprehensively analyze the vibration data, key-phase signal and state data, and can test the stator slot wedge of the motor in normal operation, and can operate the motor at the same power. At the time, according to the vibration data, the vibration change of the stator slot wedge can be observed, the state of the stator slot wedge can be more accurately analyzed, and the accuracy of the stator slot wedge test can be improved.

S220. Determine the current power of the motor according to the state data, and determine the current frequency of the motor according to the key phase signal.

Specifically, the state data includes the current data and voltage data of the motor, and the current power of the motor can be determined according to the current data and the voltage data; and the current frequency of the motor is determined according to the key phase signal, and the vibration data with the same power and the same frequency can be compared. , so as to accurately determine the vibration change of the stator slot wedge; for the variable frequency motor, the stator slot wedge can also be tested more accurately.

S230: Determine the current vibration value of the stator slot wedge according to the vibration data of multiple points on at least one stator slot wedge in each phase band of the motor.

Specifically, according to the acquired vibration data of the stator slot wedge, the current vibration value of the stator slot wedge is determined, and the vibration amplitude of the stator slot wedge can be determined in real time, which is convenient for analyzing the vibration condition of the stator slot wedge. When the vibration condition is abnormal, It can remind the staff in time, realize the monitoring and analysis of the state of the stator slot wedge, and achieve the effect of rapid detection.

S240. When the current vibration value is greater than the preset vibration value corresponding to the current power and the current frequency, determine that the vibration of the stator slot wedge is abnormal.

Specifically, the preset vibration value corresponding to the current power and the current frequency is determined, and the current vibration value is compared with the preset vibration value. If the current vibration value is greater than the preset vibration value, it indicates that the current vibration value of the stator slot wedge is too large. It can be determined that the vibration of the stator slot wedge is abnormal, and the fastening state of the stator slot wedge is abnormal, so as to determine the abnormality of the stator slot wedge. By comparing the preset vibration value corresponding to the current power and the current frequency with the current vibration value, the vibration condition of the stator slot wedge can be more accurately determined, and the effect of accurately testing the stator slot wedge can be achieved.

S250. When the vibration of the stator slot wedge is abnormal, it is determined that the stator slot wedge is abnormal, and an alarm message is issued.

Specifically, if the vibration of the stator slot wedge is abnormal, the tightening state of the stator slot wedge is abnormal, and if the stator slot wedge is loose, an alarm message will be issued, and the staff will be reminded to repair the stator slot wedge in time.

Optionally, after the alarm signal is issued, the method further includes: outputting a maintenance list.

Specifically, after the fastening state of the stator wedge is abnormal, an alarm message is issued to remind the staff, and the maintenance list of the stator wedge is output, and the maintenance list includes, for example, the number of the abnormal stator wedge and the vibration data of the abnormal stator wedge. and the suggested overhaul plan, etc., so that the staff can overhaul the stator slot wedge according to the overhaul list.

FIG. 3 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. Optionally, referring to FIG. 3 , the motor stator slot wedge monitoring and analysis method includes:

S310: Acquire vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, acquire key phase signals of the motor, and acquire state data of the motor.

S320. Determine the maximum vibration value and the average vibration value of each stator slot wedge according to vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor.

Specifically, the vibration sensor can collect the vibration data of multiple points on the stator slot wedge, determine the maximum vibration value and the average vibration value of the stator slot wedge according to the vibration data of the multiple points, and combine the maximum vibration value and the average vibration value to determine the stator slot wedge. The vibration of the stator can be analyzed more accurately, and the health of the stator wedge can be determined more accurately; when the vibration value of a certain point is large, and the average vibration value is small, it is determined that the stator wedge is abnormal, so as to avoid misjudgment and achieve accurate determination. The effect of the health of the stator wedges.

S330. When it is determined according to the state data that the current power of the motor remains unchanged, the difference between the maximum vibration value and the average vibration value is less than the first preset value, and when the maximum vibration value is less than the second preset value, determine the health of the stator slot wedges in normal condition.

Specifically, when it is determined according to the state data that the current power of the motor remains unchanged, the state of the stator wedge can be more accurately determined by observing the changes of the maximum vibration value and the average vibration value of the stator slot wedge. When the current power of the motor remains unchanged, the difference between the maximum vibration value and the average vibration value is smaller than the first preset value, and when the maximum vibration value is smaller than the second preset value, it indicates that the difference between the maximum vibration value and the average vibration value is small, And the maximum vibration value and average value are both small, the stator slot wedge is relatively tight, and it can be determined that the health of the stator slot wedge is in a normal state. The first preset value and the second preset value may be determined according to actual conditions, for example, according to parameters such as the model of the motor, the size and material of the stator slot wedge, which are not limited in this embodiment.

Exemplarily, FIG. 4 is a schematic diagram of the vibration analysis result of the stator slot wedge provided by the embodiment of the present invention. As shown in FIG. 4 , the curve ① is the curve of the maximum vibration value of the stator slot wedge changing with time, and the curve ② is the stator slot wedge. The curve of the average vibration value changing with time, the abscissa of the curve is the running time of the motor, and the ordinate of the curve is the vibration per unit value of the stator slot wedge. In the first stage t1, the difference between the maximum vibration value and the average vibration value is less than the first A preset value, and the maximum vibration value is less than the second preset value, the health of the stator slot wedge is in a normal state.

S340. Determine the stator slot when the maximum vibration value is greater than the second preset value, the rate of change of the maximum vibration value is greater than the third preset value, and the rate of change of the average vibration value is less than the fourth preset value as the motor running time changes The health of the wedge is a matter of concern.

Specifically, when it is determined according to the state data that the current power of the motor remains unchanged, the maximum vibration value is greater than the second preset value as the running time of the motor changes, and if the rate of change of the maximum vibration value is greater than the third preset value, and the average vibration The change rate of the value is less than the fourth preset value, indicating that the vibration value of the stator slot wedge is large, and the maximum vibration value increases rapidly, the average vibration value increases slowly, and the stator slot wedge is relatively loose. Health is pending. The specific values of the third preset value and the fourth preset value may be determined according to actual conditions, for example, according to parameters such as the model of the motor, the size and material of the stator slot wedge, which are not limited in this embodiment.

Exemplarily, referring to Fig. 4, in the second stage, the maximum vibration value is larger, and the rate of change of the maximum vibration value is larger, and the average vibration value also increases slowly, indicating that the stator slot wedge is relatively loose. Health is pending.

S350. When the change rate of the maximum vibration value is less than the fifth preset value and the change rate of the average vibration value is greater than the sixth preset value with the change of the motor running time, it is determined that the health of the stator slot wedge is in an abnormal state.

Specifically, when it is determined according to the state data that the current power of the motor remains unchanged, with the change of the running time of the motor, the change rate of the maximum vibration value of the stator slot wedge is less than the fifth preset value, and the change rate of the average vibration value is greater than the sixth preset value. The setting value indicates that the maximum vibration value of the stator slot wedge is in a relatively stable state, the average vibration value increases greatly, and the overall vibration value of the stator slot wedge increases greatly, then the stator slot wedge is relatively loose, and the stator slot wedge is relatively loose. Health is abnormal. The fifth preset value and the sixth preset value may be determined according to actual conditions, for example, according to parameters such as the model of the motor, the size and material of the stator slot wedge, which are not limited in this embodiment.

Exemplarily, referring to FIG. 4 , in the third stage t3, the maximum vibration value of the stator slot wedge increases slowly, the average vibration value increases rapidly, the overall vibration value of the stator slot wedge increases greatly, and the stator slot wedge is relatively loose. The health of the stator wedges is abnormal.

S360. As the motor running time changes, the rate of change of the maximum vibration value is less than the seventh preset value, the rate of change of the average vibration value is greater than the eighth preset value, and the difference between the average vibration value and the maximum vibration value is less than the ninth preset value Set the value to determine that the health of the stator wedge is in a serious abnormal state.

Specifically, when it is determined according to the state data that the current power of the motor remains unchanged, with the change of the running time of the motor, the change rate of the maximum vibration value is less than the seventh preset value, the change rate of the average vibration value is greater than the eighth preset value, and the average The difference between the vibration value and the maximum vibration value is smaller than the ninth preset value, indicating that the maximum vibration value is in a relatively stable state, the average vibration value changes greatly, and the average vibration value is close to the maximum vibration value, that is, the difference between the points of the stator slot wedges. The vibration values are all large, indicating that the stator slot wedge is in a critical state of complete loosening, and the health of the stator slot wedge is in a serious abnormal state. Among them, the seventh preset value, the eighth preset value and the ninth preset value can be determined according to the actual situation, for example, determined according to parameters such as the model of the motor, the size and material of the stator slot wedge, and this embodiment does not limited.

Exemplarily, referring to FIG. 4 , in the fourth stage t4, the maximum vibration value of the stator slot wedge tends to be stable, the average vibration value varies greatly, and the average vibration value is close to the maximum vibration value, that is, the vibration of each point of the stator slot wedge. If the value is large, the stator slot wedge is in a critical state of complete loosening, and the health of the stator slot wedge is in a serious abnormal state.

S370, when the health of the stator slot wedge is in a state to be paid attention to, an abnormal state or a serious abnormal state, an alarm message is issued.

Specifically, when the health of the stator slot wedge is in the state of concern, abnormal state or serious abnormal state, it indicates that the stator slot wedge is loose and the fastening state of the stator wedge is abnormal, and the control module will issue an alarm message to remind the staff Repair in time. Exemplarily, the control module may issue different alarm information according to different states of the health of the stator wedges, so that the staff can determine the abnormality of the stator wedges according to the alarm information.

5 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. Optionally, referring to FIG. 5 , the motor stator slot wedge monitoring and analysis method includes:

S410: Acquire vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, acquire key phase signals of the motor, and acquire state data of the motor.

S420, according to the vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, determine the over-frequency vibration value of each stator slot wedge; wherein, the over-frequency vibration value is a vector of the vibration amplitudes of all vibration data and.

Specifically, according to a plurality of vibration data on the stator slot wedge, the vibration amplitude value corresponding to the vibration data can be determined, and then the over-frequency vibration value of the stator slot wedge can be determined; according to the over-frequency vibration value, the vibration state of the stator slot wedge can be determined, for example When the over-frequency vibration value is large, the stator slot wedge vibrates greatly, and looseness may occur; when the over-frequency vibration value is small, the stator slot wedge vibration is smaller, and the stator slot wedge is relatively tight.

S430. Determine the main frequency vibration component of the stator slot wedge according to the state data and the vibration data.

Specifically, the current frequency of the motor can be determined according to the state data, and the main frequency of the stator slot wedge can be determined according to the current frequency of the motor; Fourier transform is performed on the vibration data of the stator slot wedge, and the vibration data can be converted into the frequency domain, thereby Determine the main frequency vibration component of the stator wedge, that is, the component with the largest vibration. Moreover, if the frequency corresponding to the main frequency vibration component in the frequency domain curve of the stator slot wedge is consistent with the main frequency of the stator slot wedge determined according to the current frequency of the motor, it indicates that the stator slot wedge is relatively tight.

S440. When the over-frequency vibration value is less than the tenth preset value, and the proportion of the main frequency vibration component in all frequency components is greater than the eleventh preset value, it is determined that the health of the stator wedge is in a normal state.

Specifically, when the general frequency vibration value is less than the tenth preset value, and the proportion of the main frequency vibration component in all frequency components is greater than the eleventh preset value, it indicates that the vibration amplitude of the stator slot wedge is small, and the clutter The component is small, the vibration of the stator slot wedge is small, and it can be determined that the health of the stator slot wedge is in a normal state. The specific values of the tenth preset value and the eleventh preset value may be determined according to the actual situation, which is not limited in this embodiment.

S450. When the change rate of the common frequency vibration value is greater than zero with the change of the motor running time, and the change rate of the proportion of the main frequency vibration component in all frequency components is less than zero, it is determined that the health of the stator slot wedge is in a state to be concerned.

Specifically, with the change of the running time of the motor, the change rate of the general frequency vibration value is greater than zero, and the change rate of the main frequency vibration component in all frequency components is less than zero, indicating that the general frequency vibration value begins to increase, and the main frequency vibration value begins to increase. The proportion of vibration component decreases, the proportion of clutter component increases, the stator slot wedge begins to loosen, and the degree of loosening is increasing, and the health of the stator slot wedge is in a state of concern.

S460. When the over-frequency vibration value is greater than the twelfth preset value, and the proportion of the main frequency vibration component in all frequency components is less than the thirteenth preset value, it is determined that the health of the stator wedge is in an abnormal state.

Specifically, when the over-frequency vibration value is greater than the twelfth preset value, and the proportion of the main frequency vibration component in all frequency components is smaller than the thirteenth preset value, it indicates that the over-frequency vibration value is larger and the excitation force is dominant The proportion of the frequency vibration component becomes smaller, the stator slot wedge is in a critical state of complete loosening, the subsequent stator slot wedge will experience accelerated wear, and the health of the stator slot wedge is in an abnormal state. The twelfth preset value and the thirteenth preset value may be determined according to the actual situation, which is not limited in this embodiment.

S470, when the health of the stator slot wedge is in a concerned state or an abnormal state, an alarm message is issued.

Specifically, when the health of the stator slot wedge is in a state to be concerned or in an abnormal state, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, and the control module will issue an alarm message to remind the staff to perform maintenance in time. Exemplarily, the control module may issue different alarm information according to different states of the health of the stator wedges, so that the staff can determine the abnormality of the stator wedges according to the alarm information.

6 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. Optionally, referring to FIG. 6 , the motor stator slot wedge monitoring and analysis method includes:

S510: Acquire vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, acquire key phase signals of the motor, and acquire state data of the motor.

S520. Determine an average vibration value of each stator slot wedge according to vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor.

Specifically, the vibration sensor can collect vibration data of multiple points on the stator slot wedge, and determine the average vibration value of the stator slot wedge according to the vibration data of the multiple points. The average vibration value can reflect the overall vibration state of the stator slot wedge, which is convenient for the stator slot wedge. Slot wedge for testing.

S530. When it is determined according to the state data that the power of the motor remains unchanged, the rate of change of the average vibration value of the stator slot wedge is greater than the fourteenth preset value, and the rate of change of the temperature of the motor is determined to be greater than the fifteenth preset value according to the state data , determine that the health of the stator slot wedge is in an abnormal state.

Specifically, when it is determined according to the state data that the power of the motor remains unchanged, the rate of change of the average vibration value of the stator slot wedge is greater than the fourteenth preset value, and it is determined according to the state data that the rate of change of the temperature of the motor is greater than the fifteenth preset value When , it indicates that the average vibration value of the stator slot wedge is larger, that is, the overall vibration of the stator slot wedge is more serious; and the temperature of the stator winding also climbs, indicating that the vibration of the stator bar increases, which has caused the temperature of the stator winding to rise. The main insulation of the stator bar will be worn, and the health of the stator slot wedge is in an abnormal state. The fourteenth preset value and the fifteenth preset value may be determined according to the actual situation, for example, determined according to parameters such as the motor model, the size and material of the stator slot wedge, which are not limited in this embodiment.

S540, when the health of the stator slot wedge is in an abnormal state, an alarm message is issued.

Specifically, when the health of the stator slot wedge is in an abnormal state, it indicates that the stator slot wedge is loose and the tightening state of the stator slot wedge is abnormal, and the control module will issue an alarm message to remind the staff to perform maintenance in time. Exemplarily, the control module may issue different alarm information according to different states of the health of the stator wedges, so that the staff can determine the abnormality of the stator wedges according to the alarm information.

FIG. 7 is a flowchart of another method for monitoring and analyzing a motor stator slot wedge provided by an embodiment of the present invention. Optionally, referring to FIG. 7 , the motor stator slot wedge monitoring and analysis method includes:

S610: Acquire vibration data of multiple points on at least one stator slot wedge in each phase belt of the motor, acquire key phase signals of the motor, and acquire state data of the motor.

S620. Establish a corresponding relationship of the looseness according to the vibration data, stator parameters and looseness of the stator wedge of the motor of the same model as the motor.

Specifically, according to the pre-stored vibration data, stator parameters and looseness of the stator wedges of the motor of the same model as the motor, the corresponding relationship of the looseness can be established, and the corresponding relationship can be a model, a look-up table, or other forms. .

S630: Determine the residual looseness of the stator slot wedges according to the current vibration data of the stator slot wedges, the current stator parameters in the state data, and the corresponding relationship.

Specifically, by substituting the current vibration data of the stator slot wedge and the current stator parameters into the corresponding relationship, the current looseness of the stator wedge can be determined, and according to the pre-stored maximum looseness of the stator wedge of the motor of the same model as the motor, By subtracting the current looseness, the remaining looseness of the stator wedges can be determined.

S640, when the remaining looseness of the stator slot wedge is less than the preset looseness, an alarm message is issued.

Specifically, the preset looseness amount is, for example, the residual looseness amount corresponding to the abnormality of the stator slot wedge. When the residual looseness amount is less than the preset looseness amount, it indicates that the residual looseness amount of the stator slot wedge is small, and the looseness degree of the stator wedge is relatively large. , the stator slot wedge is abnormal, the control module will issue an alarm message to remind the staff to repair in time.

Optionally, the method for monitoring and analyzing the stator slot wedge of the motor further includes: displaying at least one of the vibration condition, the health degree and the residual looseness of the stator slot wedge.

Specifically, at least one of the vibration, health and remaining looseness of the stator wedge can be displayed in a graphic form, which facilitates the staff to observe the state of the stator wedge in real time and achieves the effect of quickly testing the stator wedge.

8 is a schematic structural diagram of a motor stator slot wedge monitoring and analysis device provided by an embodiment of the present invention. Referring to FIG. 8 , the motor stator slot wedge monitoring and analysis device includes: a sensing module 710 and a control module 720; the sensing module 710 and the control module The module 720 is connected, and the sensing module 710 is used to collect the sensing data of the motor and the state data of the motor; the control module 720 is used to obtain the sensing data and state data of the motor; The fixed state, wherein the tightening state includes at least one of the vibration condition, the health degree and the remaining loose amount; when it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued; wherein the sensing data includes the stator wedge of the motor. Vibration data and key phase signal of the motor.

Specifically, the sensing module 710 collects the sensing data and state data of the motor, for example, the vibration data of the stator wedge of the motor is collected by the capacitive vibration sensor, and the key phase signal of the motor is collected by the eddy current sensor, and the control module can obtain from the sensor. Sensor data and status data of the motor. The control module 720 is, for example, an overall control system of the power station, and may also be other controllers, which are not limited in this embodiment.

Exemplarily, the motor is, for example, a driving machine of an auxiliary machine of a power plant, that is, a machine that provides assistance for the generator to generate electricity. The motor can drive, for example, a fan system and a water pump system in a boiler system and a steam turbine system. The state data of the motor include, for example, the actual power of the generator set, the total fuel volume of the boiler, the main steam flow, and the total air volume, etc., as well as the flue gas flow, air pressure, air temperature, and damper opening of the fan system; The total flow, pressure, etc. of the water pump system also includes data such as motor stator current, stator current frequency, stator voltage, stator winding temperature, cold air temperature, and hot air temperature. The control module 720 can determine whether the running state of the motor is normal according to the state data of the motor. In the case that the running state of the motor is normal, the vibration data of the stator slot wedge of the motor can be analyzed to more accurately analyze the state of the stator slot wedge. , so as to judge the looseness of the stator slot wedge. The control module 720 determines the tightening state of the stator slot wedge according to the sensing data and the state data, and can determine whether the stator slot wedge is loose, so as to determine whether the stator slot wedge is abnormal. When the tightening state is abnormal, it indicates that the stator slot wedge is loose, and it can be determined that the stator slot wedge is abnormal. Exemplarily, when the control module 720 determines whether the stator slot wedge is abnormal according to the tightening state, the control module 720 may make judgment according to at least one of the vibration condition, the health degree and the remaining loose amount. When the control module 720 determines that the motor is running normally according to the state data, the current frequency of the motor can be determined through the key phase signal, and the vibration data of the stator slot wedge corresponding to the current frequency is compared with the preset vibration data corresponding to the current frequency, and the stator slot can be determined. Whether the vibration of the wedge is abnormal; therefore, by collecting the vibration data of the stator slot wedge in real time, it is possible to judge whether the vibration of the stator slot wedge is abnormal in real time, so as to achieve the effect of quickly testing the stator wedge; The vibration data of the stator slot wedge can determine the health of the stator slot wedge, and judge whether the health of the stator slot wedge is normal, abnormal, or seriously abnormal, so as to determine whether the looseness of the stator wedge is abnormal in real time, so as to achieve a rapid test. The effect of the stator slot wedge; when the control module 720 determines that the motor is running normally according to the state data, the current frequency of the motor can be determined according to the key phase signal, the current stator parameters in the motor can be determined according to the state data, and the current frequency, the current stator parameters and the current vibration data are determined. The residual looseness of the stator wedge can be determined; according to the residual looseness, the looseness of the stator wedge can be judged in real time, so as to achieve the effect of quickly testing the stator wedge; and, combined with the key phase signal and state data of the motor, the stator wedge can be judged. Looseness, the stator wedge can be tested more accurately. When it is judged that the vibration of the stator wedge is abnormal, or the health of the stator wedge is low, or the stator wedge is seriously loose, the control module will send an alarm message to remind the staff to repair the stator wedge in time.

FIG. 9 is a schematic structural diagram of another motor stator slot wedge monitoring and analysis device provided by an embodiment of the present invention. Optionally, referring to FIG. 9 , the sensing module 710 includes a capacitive vibration sensor 711 and an eddy current sensor; the capacitive vibration sensor 711 is arranged on the stator slot wedge 810 in each phase band, and at least one capacitive vibration sensor 711 is arranged in each phase band, and the capacitive vibration sensor 711 is used to collect vibration data of multiple points of the stator slot wedge; eddy current The sensor is used to collect the key phase signal of the motor.

Specifically, at least one capacitive vibration sensor 711 is arranged in each phase band, for example, one capacitive vibration sensor 711 is arranged in each phase band. As shown in FIG. 9 , the capacitive vibration sensor 711 is uniform along the surrounding direction of the iron core 820 distributed. The capacitive vibration sensor 711 is a sheet-type sensor. The capacitive vibration sensor 711 can be fixed on the stator slot wedge 810 by adhesive, so as to detect the vibration data of multiple points on the stator slot wedge 810. The capacitive vibration sensor 711 is provided with On the stator wedges 810 in each phase band, the stator wedges in each phase band can be analyzed. The eddy current sensor can detect the key phase signal of the motor, which is convenient to determine the frequency of the motor, so that whether the motor is a fixed frequency motor or a variable frequency motor, the stator slot wedge can be tested and analyzed. The eddy current sensor is arranged near the key phase slot of the motor, the key phase slot is arranged on the rotating shaft of the motor, and the key phase slot is aligned with the center position of the adjacent magnetic poles of the rotor.

Exemplarily, before the capacitive vibration sensor 711 and the eddy current sensor perform detection, the parameters of the capacitive vibration sensor 711 and the eddy current sensor can be set through the control module 720, for example, parameters such as sensitivity, sampling rate, number, and range can be set, so as to facilitate Improve detection accuracy.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, and as long as the desired results of the technical solutions of the present invention can be achieved, no limitation is imposed herein.

The above-mentioned specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a motor stator slot wedge monitoring and analysis method, is characterized in that, comprises: Acquiring sensing data and state data of the motor; wherein the sensing data includes vibration data of the stator wedges of the motor and key phase signals of the motor; Determine a tightening state of the stator wedges according to the sensing data and the state data, wherein the tightening state includes at least one of a vibration condition, a degree of health, and a residual looseness; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued. 2. The method according to claim 1, wherein acquiring sensor data of the motor comprises: Acquire vibration data of multiple points on at least one of the stator slot wedges in each phase belt of the motor, and acquire key phase signals of the motor. 3 . The method according to claim 1 , wherein determining the tightening state of the stator slot wedges according to the sensing data and the state data, comprising at least one of the following: 4 . Determine the vibration condition of the stator slot wedge according to the sensing data and the state data; determining the health of the stator wedges according to the sensing data and the state data; The remaining loose amount of the stator wedge is determined according to the sensing data and the state data. 4. The method according to claim 3, wherein determining the vibration condition of the stator slot wedge according to the sensing data and the state data, comprising: Determine the current power of the motor according to the state data, and determine the current frequency of the motor according to the key phase signal; Determine the current vibration value of the stator slot wedge according to vibration data of multiple points on at least one of the stator slot wedges in each phase band of the motor; When the current vibration value is greater than the preset vibration value corresponding to the current power and the current frequency, determine that the vibration of the stator slot wedge is abnormal; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including: When the vibration of the stator slot wedge is abnormal, it is determined that the stator slot wedge is abnormal, and an alarm message is issued. 5. The method according to claim 3, wherein determining the health of the stator slot wedges according to the sensing data and the state data comprises: Determine the maximum vibration value and the average vibration value of each of the stator slot wedges according to vibration data of multiple points on at least one of the stator slot wedges in each phase band of the motor; When it is determined according to the state data that the current power of the motor remains unchanged, the difference between the maximum vibration value and the average vibration value is less than a first preset value, and when the maximum vibration value is less than a second preset value , determine that the health of the stator slot wedge is in a normal state; As the motor running time changes, the maximum vibration value is greater than the second preset value, the rate of change of the maximum vibration value is greater than the third preset value, and the rate of change of the average vibration value is less than the fourth preset value When the value is , it is determined that the health of the stator slot wedge is in the state to be concerned; With the change of the running time of the motor, when the rate of change of the maximum vibration value is less than the fifth preset value, and the rate of change of the average vibration value is greater than the sixth preset value, it is determined that the health of the stator wedge is abnormal state; As the motor running time changes, the rate of change of the maximum vibration value is less than the seventh preset value, the rate of change of the average vibration value is greater than the eighth preset value, and the difference between the average vibration value and the maximum vibration value is The difference value is less than the ninth preset value, it is determined that the health of the stator slot wedge is in a serious abnormal state; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including: When the health of the stator slot wedge is in the state to be concerned, the abnormal state or the serious abnormal state, an alarm message is issued. 6. The method according to claim 3, wherein determining the health of the stator wedges according to the sensing data and the state data comprises: According to the vibration data of multiple points on at least one of the stator slot wedges in each phase belt of the motor, the over-frequency vibration value of each stator slot wedge is determined; wherein, the over-frequency vibration value is all vibration data The vector sum of the vibration amplitudes; Determine the main frequency vibration component of the stator slot wedge according to the state data and the vibration data; When the over-frequency vibration value is less than the tenth preset value, and the proportion of the main frequency vibration component in all frequency components is greater than the eleventh preset value, it is determined that the health of the stator wedge is in a normal state; With the change of the running time of the motor, when the rate of change of the general frequency vibration value is greater than zero, and the rate of change of the proportion of the main frequency vibration component in all frequency components is less than zero, it is determined that the health of the stator slot wedge is in the range. pending status; When the over-frequency vibration value is greater than the twelfth preset value, and the proportion of the main frequency vibration component in all frequency components is less than the thirteenth preset value, it is determined that the health of the stator wedge is in an abnormal state ; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including: When the health of the stator slot wedge is in a concerned state or an abnormal state, an alarm message is issued. 7. The method according to claim 3, wherein determining the health of the stator wedges according to the sensing data and the state data comprises: determining an average vibration value of each of the stator wedges according to vibration data of a plurality of points on at least one of the stator wedges in each phase band of the motor; When it is determined according to the state data that the power of the motor remains unchanged, the rate of change of the average vibration value of the stator wedges is greater than the fourteenth preset value, and the rate of change of the temperature of the motor is determined according to the state data When it is greater than the fifteenth preset value, it is determined that the health degree of the stator slot wedge is in an abnormal state; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including: When the health of the stator slot wedge is in an abnormal state, an alarm message is issued. 8 . The method according to claim 3 , wherein determining the residual looseness of the stator slot wedges according to the sensing data and the state data, comprising: 8 . According to the vibration data of the stator slot wedge of the motor of the same model as the motor, the stator parameter and the loose amount, the corresponding relationship of the loose amount is established; Determine the residual looseness of the stator slot wedge according to the current vibration data of the stator slot wedge, the current stator parameter in the state data and the corresponding relationship; When it is determined that the stator wedge is abnormal according to the tightening state, an alarm message is issued, including: When the residual looseness of the stator slot wedge is less than the preset looseness, an alarm message is issued. 9. A motor stator slot wedge monitoring and analysis device, characterized in that, comprising: a sensing module and a control module; The sensing module is connected with the control module, and the sensing module is used to collect the sensing data of the motor and the state data of the motor; the control module is used to obtain the sensing data and state data of the motor; according to the The sensing data and the state data determine a tightening state of the stator wedge, wherein the tightening state includes at least one of a vibration condition, a degree of health, and a residual looseness; the tightening state is determined according to the tightening state. When the stator slot wedge is abnormal, an alarm message is issued; wherein, the sensing data includes vibration data of the stator slot wedge of the motor and the key phase signal of the motor. 10. The motor stator slot wedge monitoring and analysis device according to claim 9, wherein the sensing module comprises a capacitive vibration sensor and an eddy current sensor; The capacitive vibration sensor is arranged on the stator slot wedge in each phase band, and at least one of the capacitive vibration sensor is arranged in each phase band, and the capacitive vibration sensor is used to collect the multi-frequency characteristics of the stator slot wedge. vibration data of points; The eddy current sensor is used to collect the key phase signal of the motor.

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