CN112191691B - Method for rapidly judging and processing vibration of rolling mill - Google Patents
Method for rapidly judging and processing vibration of rolling mill Download PDFInfo
- Publication number
- CN112191691B CN112191691B CN202011091679.1A CN202011091679A CN112191691B CN 112191691 B CN112191691 B CN 112191691B CN 202011091679 A CN202011091679 A CN 202011091679A CN 112191691 B CN112191691 B CN 112191691B
- Authority
- CN
- China
- Prior art keywords
- speed
- torque
- turning
- rolling mill
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/008—Monitoring or detecting vibration, chatter or chatter marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention relates to a method for rapidly judging and processing vibration of a rolling mill, belonging to the technical field of operation control of cold rolling equipment. The technical scheme of the invention is as follows: the analysis solves the problem that the rolling mill vibrates in the speed detection link, the torque curve characteristics are analyzed through the PDA data, the analysis solves the problem that the current detection causes the rolling mill to vibrate, and the analysis solves the problem that the power unit causes the rolling mill to vibrate. The invention has the beneficial effects that: the nature, degree and position of the fault are determined by analyzing the operation curves of the motor speed, torque, current and the like, and the vibration characteristics of the signals are determined by analyzing the time of the signals, so that the corresponding relation between the characteristics of the fault curve and the fault is obtained; the device can quickly judge and control the vibration of the rolling mill caused by electricity when the rolling mill works, thereby reducing the rejection rate and the production cost of strip steel, reducing the damage to mechanical and electrical equipment and ensuring normal production.
Description
Technical Field
The invention relates to a method for rapidly judging and processing vibration of a rolling mill, belonging to the technical field of operation control of cold rolling equipment.
Background
The operation requirement of the acid rolling line rolling mill in the cold rolling plant is stable, the system is prevented from greatly oscillating, and the method is of great importance for prolonging the service life of equipment and improving the product quality. The operation vibration is divided into mechanical and electrical reasons, and comprises the following: gear eccentricity or damage, rotating component imbalance, equipment misalignment, bearing damage, torque variation, medium load fluctuation, structural resonance or system oscillation, and roll system state. The rolling mill runs and shakes, strip steel shakes, the sound of the motor is abnormal, impact is caused to equipment, and the damage to mechanical and electrical equipment is great; the vibration speed is inevitably fluctuated, the tension is fluctuated at the same time, the pressing system is immediately adjusted, the product thickness is inevitably fluctuated, the product thickness is seriously out of tolerance, quality accidents are caused, even the rolling crack, the deviation and the belt break, the roller is scratched, and great waste is caused.
How to study the vibration of the rolling mill is a problem that technicians in rolling mill production must take careful consideration, how to quickly solve the vibration problem, and even more, how to take careful consideration. Vibration becomes a very significant problem regarding the quality of the products of the cold rolling mill. The current general research method is as follows: the method comprises the steps of installing a vibration sensor, detecting a vibration signal, extracting fault characteristic information, determining the position, type and degree of a fault, making a processing suggestion for judging the fault, carrying out follow-up tracking and verifying accumulated experience. The results are not few, and the detection of the Bao steel industry is quite good, but the research on the oscillation caused by electrical control is less. The project is supplemented. Aiming at the problem, since 2 months and so far in 2011, a great deal of research is carried out, and creative research is carried out: the rolling mill vibration caused by the electric system and the reason thereof, and a corresponding processing scheme. Theory is connected with reality, and theoretical analysis is carried out on the obtained conclusion. The method for judging the rolling mill vibration effect caused by electricity by using the project research is remarkable, long-time search is avoided, and the accident handling time is greatly reduced.
Disclosure of Invention
The invention aims to provide a method for quickly judging and processing vibration of a rolling mill, which basically covers faults caused by electrical reasons (excluding motor bearings) and all aspects of degradation of a transmission control device, determines the nature, degree and position of the faults by analyzing operation curves of motor speed, torque, current and the like, determines the vibration characteristics of the faults by time analysis of signals and obtains the corresponding relation between the characteristics of the fault curves and the faults; the device can quickly judge and control the vibration of the rolling mill caused by electricity when the rolling mill works, reduce the rejection rate and the production cost of strip steel, reduce the damage to mechanical and electrical equipment, ensure normal production and effectively solve the problems in the prior art.
The technical scheme of the invention is as follows: a method for rapidly judging and processing vibration of a rolling mill comprises the following steps:
step 1: analyzing and solving the problem of rolling mill vibration caused by a speed detection link, comprising the following specific steps of:
step 1-1: analyzing the characteristics of the speed curve of the rolling mill through PDA data; if the speed fluctuates abnormally and the distortion is severe in a short period, turning to the step 1-2; if the speed fluctuates up and down on the set value, the range is small, and the speed is smooth and has no distortion, so that the speed detection link can be judged to be normal, and the step 1 is ended;
step 1-2: the speed is abnormally fluctuated, has no smooth change, is directly jumped up and down, and is judged to be a typical speed detection problem; sudden change exists in a very short time, the frequency is high, and the judgment is caused by the problem of the encoder loop;
step 1-3: checking whether there is a problem with the encoder circuit part or the encoder-to-control unit interface part; if yes, turning to the step 1-4, otherwise, turning to the step 1-5;
step 1-4: restoring the encoder circuit portion or encoder to control unit interface component function; turning to step 1-1;
step 1-5: replacing the encoder, and turning to the step 1-1 after the replacement is finished;
step 2: the method for analyzing and solving the vibration of the rolling mill caused by the voltage detection problem comprises the following specific steps:
step 2-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step 2-2 is switched to; if the torque has no abnormal waveform, ending the step 2;
step 2-2: if the speed fluctuates in the high-speed no-load stage, the torque fluctuation, the torque current and the exciting current fluctuate as well, and the speed periodically fluctuates and the current fluctuates in the stage of converting the current model into the voltage model and the voltage model, the problem of a voltage detection link can be judged, and the step 2-3 is switched; otherwise, ending the step 2;
step 2-3: checking whether there is a problem with the voltage transformer circuit part or the voltage transformer to control unit interface part; if yes, turning to the step 2-4, otherwise, turning to the step 2-5;
step 2-4: restoring the function of the voltage transformer circuit part or the interface part from the voltage transformer to the control unit, and turning to the step 2-1;
step 2-5: replacing the voltage transformer; after the replacement is finished, turning to the step 2-1;
and step 3: the method for analyzing and solving the vibration of the rolling mill caused by the current detection problem comprises the following specific steps:
step 3-1: if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step is turned to step 3-2; if the torque has no abnormal waveform, ending the step 3;
step 3-2: if the high-speed no-load operation is carried out, the fluctuation of the magnetic field current is not large, which indicates that the voltage detection is normal, and the small fluctuation is caused by the adjustment of the stator current magnetic field component; when the vehicle is stopped, the speed cannot be zero, the vehicle fluctuates up and down at a set value, the speed fluctuation period is consistent with the torque fluctuation period, the situation that the current detection link is judged to be a problem due to torque fluctuation is fully explained, and the vehicle turns to the step 3-3; otherwise, ending the step 3;
step 3-3: checking whether a problem exists in a current transformer circuit part or a current transformer to control unit interface part; if yes, turning to the step 3-4, otherwise, turning to the step 3-5;
step 3-4: restoring the function of the current transformer circuit part or the interface part of the current transformer to the control unit; turning to step 3-1;
step 3-5: replacing the current transformer; after the replacement is finished, turning to the step 3-1;
and 4, step 4: analyzing and solving the problem of the power unit to cause the vibration of the rolling mill, comprising the following specific steps:
step 4-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, and meanwhile, the torque is normal and has no abnormal waveform, turning to the step 4-2, and if not, ending the step 4;
step 4-2: comparing at least three groups of no-load running speeds to observe torque fluctuation, if the set value is higher in set speed, the torque fluctuation is larger, and the follow-up performance of the actual value of the torque and the set value is poor, turning to the step 4-3; if the set speed is increased, the speed-up stage is long, and a larger acceleration torque is needed, and when the actual speed value comes, the torque should return to overcome the fixed no-load torque, which is a normal condition, the step 4 is ended;
step 4-3: checking whether there is a problem with the power cell circuit portion or the power cell to control unit interface component; if yes, turning to the step 4-4, otherwise, turning to the step 4-5;
step 4-4: restoring power cell circuit portion or power cell to control unit interface feature functionality; turning to step 4-1;
and 4-5: replacing the power unit; after the replacement is finished, turning to the step 4-1;
and 5: and (6) ending.
The beneficial effects of the invention are: the method basically covers faults caused by electrical reasons (excluding motor bearings), covers all aspects of degradation of a transmission control device, determines the nature, degree and position of the faults by analyzing operation curves of motor speed, torque, current and the like, determines the vibration characteristics of the signals by time analysis of the signals, and obtains the corresponding relation between the characteristics of the fault curves and the faults; the device can quickly judge and control the vibration of the rolling mill caused by electricity when the rolling mill works, thereby reducing the rejection rate and the production cost of strip steel, reducing the damage to mechanical and electrical equipment and ensuring normal production.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more fully described below with reference to the accompanying drawings, it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
A method for rapidly judging and processing vibration of a rolling mill comprises the following steps:
step 1: analyzing and solving the problem of rolling mill vibration caused by a speed detection link, comprising the following specific steps of:
step 1-1: analyzing the characteristics of the speed curve of the rolling mill through PDA data; if the speed fluctuates abnormally and the distortion is severe in a short period, turning to the step 1-2; if the speed fluctuates up and down on the set value, the range is small, and the speed is smooth and has no distortion, so that the speed detection link can be judged to be normal, and the step 1 is ended;
step 1-2: the speed is abnormally fluctuated, has no smooth change, is directly jumped up and down, and is judged to be a typical speed detection problem; sudden change exists in a very short time, the frequency is high, and the judgment is caused by the problem of the encoder loop;
step 1-3: checking whether there is a problem with the encoder circuit part or the encoder-to-control unit interface part; if yes, turning to the step 1-4, otherwise, turning to the step 1-5;
step 1-4: restoring the encoder circuit portion or encoder to control unit interface component function; turning to step 1-1;
step 1-5: replacing the encoder, and turning to the step 1-1 after the replacement is finished;
step 2: the method for analyzing and solving the vibration of the rolling mill caused by the voltage detection problem comprises the following specific steps:
step 2-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step 2-2 is switched to; if the torque has no abnormal waveform, ending the step 2;
step 2-2: if the speed fluctuates in the high-speed no-load stage, the torque fluctuation, the torque current and the exciting current fluctuate as well, and the speed periodically fluctuates and the current fluctuates in the stage of converting the current model into the voltage model and the voltage model, the problem of a voltage detection link can be judged, and the step 2-3 is switched; otherwise, ending the step 2;
step 2-3: checking whether there is a problem with the voltage transformer circuit part or the voltage transformer to control unit interface part; if yes, turning to the step 2-4, otherwise, turning to the step 2-5;
step 2-4: restoring the function of the voltage transformer circuit part or the interface part from the voltage transformer to the control unit, and turning to the step 2-1;
step 2-5: replacing the voltage transformer; after the replacement is finished, turning to the step 2-1;
and step 3: the method for analyzing and solving the vibration of the rolling mill caused by the current detection problem comprises the following specific steps:
step 3-1: if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step is turned to step 3-2; if the torque has no abnormal waveform, ending the step 3;
step 3-2: if the high-speed no-load operation is carried out, the fluctuation of the magnetic field current is not large, which indicates that the voltage detection is normal, and the small fluctuation is caused by the adjustment of the stator current magnetic field component; when the vehicle is parked, the speed cannot be zero, the vehicle fluctuates up and down on a set value, the speed fluctuation period is consistent with the torque fluctuation period, the situation that the current detection link is judged to be a problem due to torque fluctuation is fully explained, and the vehicle turns to the step 3-3; otherwise, ending the step 3;
step 3-3: checking whether a problem exists in a current transformer circuit part or a current transformer to control unit interface part; if yes, turning to the step 3-4, otherwise, turning to the step 3-5;
step 3-4: restoring the function of the current transformer circuit part or the interface part of the current transformer to the control unit; turning to step 3-1;
step 3-5: replacing the current transformer; after the replacement is finished, turning to the step 3-1;
and 4, step 4: analyzing and solving the problem of the power unit to cause the vibration of the rolling mill, comprising the following specific steps:
step 4-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, and meanwhile, the torque is normal and has no abnormal waveform, turning to the step 4-2, and if not, ending the step 4;
step 4-2: comparing at least three groups of no-load running speeds to observe torque fluctuation, if the set value is higher in set speed, the torque fluctuation is larger, and the follow-up performance of the actual value of the torque and the set value is poor, turning to the step 4-3; if the set speed is increased, the speed-up stage is long, and a larger acceleration torque is needed, and when the actual speed value comes, the torque should return to overcome the fixed no-load torque, which is a normal condition, the step 4 is ended;
step 4-3: checking whether there is a problem with the power cell circuit portion or the power cell to control unit interface component; if yes, turning to the step 4-4, otherwise, turning to the step 4-5;
step 4-4: restoring power cell circuit portion or power cell to control unit interface feature functionality; turning to step 4-1;
and 4-5: replacing the power unit; after the replacement is finished, turning to the step 4-1;
and 5: and (6) ending.
In practical application, the specific working principle is as follows:
step 1: analyzing and solving the problem of rolling mill vibration caused by a speed detection link, comprising the following specific steps of:
step 1-1: analyzing the characteristics of the speed curve of the rolling mill through PDA data; if the speed abnormally fluctuates, the speed is severely distorted in a short period; turning to step 1-2; if the speed fluctuates up and down on the set value, the range is small, and the speed is smooth and has no distortion, so that the speed detection link can be judged to be normal, and the step 1 is ended;
step 1-2: the speed is abnormally fluctuated, smooth change does not exist, the speed jumps straight up and down, the actual speed cannot be operated according to conventional judgment, the actual torque is not verified to have the situation, the speed fluctuation time is long, the torque current, the exciting current and the torque fluctuate violently, impact is caused to a rolling mill system, and motor vibration is caused, so the speed detection problem is typical. Sudden changes occur in a very short time, and the frequency is high, which should be caused by the problems of the encoder loop;
step 1-3: checking whether there is a problem with the encoder circuit part or the encoder-to-control unit interface part; if yes, turning to the step 1-4, otherwise, turning to the step 1-5;
step 1-4: restoring the encoder circuit portion or encoder to control unit interface block functionality; turning to step 1-1;
step 1-5: when the encoder is replaced, the vibration of the encoder is intensified when a large load runs, so that the bearing state of the encoder is deteriorated and the gap amount is increased; after the replacement is finished, turning to the step 1-1;
step 2: the method for analyzing and solving the vibration of the rolling mill caused by the voltage detection problem comprises the following specific steps:
step 2-1: analyzing the characteristics of the torque curve through PDA data; the vector transformation controlled synchronous machine is based on that the angle and the size of a directional magnetic field are calculated through detected current, voltage signals and transmission speed, the directional magnetic field is taken as an X coordinate, an actual current signal is transformed to a directional coordinate system, and the directional magnetic field is divided into a magnetic field component and a torque component for control. The magnetic field and the angle thereof are calculated by using current or voltage, namely a so-called current and voltage model, according to the theory of electromechanics, the electromotive force of the motor at the low-speed stage is low, and the magnetic field obtained by integral calculation is inaccurate, so that the current model is used for calculation; the high speed phase is calculated using a voltage model. If the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step 2-2 is switched to; if the torque has no abnormal waveform, ending the step 2;
step 2-2: if the speed fluctuates in the high-speed no-load stage, the torque fluctuation, the torque current and the exciting current also fluctuate, and the speed periodically fluctuates and the current fluctuates in the conversion stage from the current model to the voltage model and the voltage model stage, the problem of a voltage detection link can be judged; turning to step 2-3; otherwise, ending the step 2;
step 2-3: checking whether a problem exists in a voltage transformer circuit part or a voltage transformer to control unit interface part; if yes, turning to the step 2-4, otherwise, turning to the step 2-5;
step 2-4: restoring the function of the voltage transformer circuit part or the voltage transformer to the control unit interface part; turning to step 1-1;
step 2-5: replacing the voltage transformer; after the replacement is finished, turning to the step 2-1;
and step 3: the method for analyzing and solving the vibration of the rolling mill caused by the current detection problem comprises the following specific steps:
step 3-1: if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step is turned to step 3-2; if the torque has no abnormal waveform, ending the step 3;
step 3-2: if the high-speed no-load operation is carried out, the fluctuation of the magnetic field current is not large, which indicates that the voltage detection is normal, and the small fluctuation is caused by the adjustment of the magnetic field component of the stator current. And when the vehicle is stopped, the speed cannot be zero, the vehicle fluctuates above and below a set value, and a speed fluctuation period is consistent with a torque fluctuation period, which is fully explained as a result of torque fluctuation. The problem of the current detection link can be judged; turning to step 3-3; otherwise, ending the step 3;
step 3-3: checking whether a problem exists in a current transformer circuit part or a current transformer to control unit interface part; if yes, turning to the step 3-4, otherwise, turning to the step 3-5;
step 3-4: restoring the function of the current transformer circuit part or the interface part of the current transformer to the control unit; turning to step 3-1;
step 3-5: replacing the current transformer; after the replacement is finished, turning to the step 3-1;
and 4, step 4: the method for analyzing and solving the vibration of the rolling mill caused by the power unit problem comprises the following specific steps:
step 4-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed periodically fluctuates, and meanwhile, the torque is normal and has no abnormal waveform; turning to the step 4-2, if not, ending the step 4;
step 4-2: comparing at least three groups of no-load running speeds to observe torque fluctuation, if the set value is higher in set speed, the torque fluctuation is larger, the following performance of the actual torque value and the set value is poor, the torque current, the speed and the torque are subjected to the same periodic fluctuation, and the torque current, the speed and the torque are free of distortion and smooth in fluctuation; this indicates that a certain phase module is abnormal in conduction or disconnection and lags behind in time, which causes that the voltage output to the motor terminal is larger or smaller, the current is also larger or smaller, and the change is not easy to be changed along with the requirement. As a result, an increase in torque is required; the torque needs to be reduced, but not later. The curve appears that the actual value of torque does not follow the set value, too late. From the analysis of a vector control principle, the higher the speed is, the faster vector rotation speed is indicated, the higher IGCT switching frequency is indicated, a certain module is abnormal, the torque pulsation is faster and larger, the motor speed fluctuation amplitude is larger, and the frequency is higher. Turning to step 4-3, if the set speed is increased, the speed-up stage is long, and a large acceleration torque is needed, and when the actual speed value comes, the torque should return to overcome the fixed no-load torque, which is a normal condition. Ending the step 4;
step 4-3: checking whether there is a problem with the power cell circuit portion or the power cell to control unit interface component; if yes, turning to the step 4-4, otherwise, turning to the step 4-5;
step 4-4: restoring power cell circuit portion or power cell to control unit interface feature functionality; turning to step 4-1;
and 4-5: replacing the power unit; after the replacement is finished, turning to the step 4-1;
and 5: and (6) ending.
Claims (1)
1. A method for rapidly judging and processing vibration of a rolling mill is characterized by comprising the following steps:
step 1: analyzing and solving the problem of rolling mill vibration caused by a speed detection link, comprising the following specific steps of:
step 1-1: analyzing the characteristics of the speed curve of the rolling mill through PDA data; if the speed fluctuates abnormally and the distortion is severe in a short period, turning to the step 1-2; if the speed fluctuates up and down on the set value, the range is small, and the speed is smooth and has no distortion, so that the speed detection link can be judged to be normal, and the step 1 is ended;
step 1-2: the speed is abnormally fluctuated, has no smooth change, is directly jumped up and down, and is judged to be a typical speed detection problem; sudden change exists in a very short time, the frequency is high, and the judgment is caused by the problem of the encoder loop;
step 1-3: checking whether there is a problem with the encoder circuit part or the encoder-to-control unit interface part; if yes, turning to the step 1-4, otherwise, turning to the step 1-5;
step 1-4: restoring the encoder circuit portion or encoder to control unit interface component function; turning to step 1-1;
step 1-5: replacing the encoder, and turning to the step 1-1 after the replacement is finished;
and 2, step: the method for analyzing and solving the vibration of the rolling mill caused by the voltage detection problem comprises the following specific steps:
step 2-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step 2-2 is switched to; if the torque has no abnormal waveform, ending the step 2;
step 2-2: if the speed fluctuates in the high-speed no-load stage, the torque fluctuation, the torque current and the exciting current fluctuate as well, and the speed periodically fluctuates and the current fluctuates in the stage of converting the current model into the voltage model and the voltage model, the problem of a voltage detection link can be judged, and the step 2-3 is switched; otherwise, ending the step 2;
step 2-3: checking whether a problem exists in a voltage transformer circuit part or a voltage transformer to control unit interface part; if yes, turning to the step 2-4, otherwise, turning to the step 2-5;
step 2-4: restoring the function of the voltage transformer circuit part or the interface part from the voltage transformer to the control unit, and turning to the step 2-1;
step 2-5: replacing the voltage transformer; after the replacement is finished, turning to the step 2-1;
and step 3: the method for analyzing and solving the vibration of the rolling mill caused by the current detection problem comprises the following specific steps:
step 3-1: if the speed detection link is normal, namely the speed is periodically fluctuated, the waveform is obviously abnormal from the torque waveform, the actual value of the torque can not follow the set value all the time, the problem of power detection or output link can be preliminarily judged, and the step is turned to step 3-2; if the torque has no abnormal waveform, ending the step 3;
step 3-2: if the high-speed no-load operation is carried out, the fluctuation of the magnetic field current is not large, which indicates that the voltage detection is normal, and the small fluctuation is caused by the adjustment of the stator current magnetic field component; when the vehicle is parked, the speed cannot be zero, the vehicle fluctuates up and down on a set value, the speed fluctuation period is consistent with the torque fluctuation period, the situation that the current detection link is judged to be a problem due to torque fluctuation is fully explained, and the vehicle turns to the step 3-3; otherwise, ending the step 3;
step 3-3: checking whether a problem exists in a current transformer circuit part or a current transformer to control unit interface part; if yes, turning to the step 3-4, otherwise, turning to the step 3-5;
step 3-4: restoring the function of the current transformer circuit part or the interface part of the current transformer to the control unit; turning to step 3-1;
step 3-5: replacing the current transformer; after the replacement is finished, turning to the step 3-1;
and 4, step 4: the method for analyzing and solving the vibration of the rolling mill caused by the power unit problem comprises the following specific steps:
step 4-1: analyzing the characteristics of the torque curve through PDA data; if the speed detection link is normal, namely the speed is periodically fluctuated, and meanwhile, the torque is normal and has no abnormal waveform, turning to the step 4-2, and if not, ending the step 4;
step 4-2: comparing at least three groups of no-load running speeds to observe torque fluctuation, if the set value is higher in set speed, the torque fluctuation is larger, and the follow-up performance of the actual value of the torque and the set value is poor, turning to the step 4-3; if the set speed is increased, the speed-up stage is long, and a larger acceleration torque is needed, and when the actual speed value comes, the torque should return to overcome the fixed no-load torque, which is a normal condition, the step 4 is ended;
step 4-3: checking whether there is a problem with the power cell circuit portion or the power cell to control unit interface component; if yes, turning to the step 4-4, otherwise, turning to the step 4-5;
step 4-4: restoring power cell circuit portion or power cell to control unit interface feature functionality; turning to step 4-1;
and 4-5: replacing the power unit; after the replacement is finished, turning to the step 4-1;
and 5: and (6) ending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091679.1A CN112191691B (en) | 2020-10-13 | 2020-10-13 | Method for rapidly judging and processing vibration of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091679.1A CN112191691B (en) | 2020-10-13 | 2020-10-13 | Method for rapidly judging and processing vibration of rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112191691A CN112191691A (en) | 2021-01-08 |
| CN112191691B true CN112191691B (en) | 2022-06-14 |
Family
ID=74008903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011091679.1A Active CN112191691B (en) | 2020-10-13 | 2020-10-13 | Method for rapidly judging and processing vibration of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112191691B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63101013A (en) * | 1986-10-15 | 1988-05-06 | Kawasaki Steel Corp | Method and apparatus for detecting abnormal oscillation of cold rolling mill |
| CN1319035A (en) * | 1999-05-27 | 2001-10-24 | 川崎制铁株式会社 | Method and apparatus for detecting chattering of cold rolling mill |
| CN1803326A (en) * | 2006-01-25 | 2006-07-19 | 冶金自动化研究设计院 | Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system |
| CN102107222A (en) * | 2009-12-24 | 2011-06-29 | 上海梅山钢铁股份有限公司 | On-line vibration detection device and method for equipment state of hot finishing mill |
| CN103521531A (en) * | 2013-11-07 | 2014-01-22 | 天津理工大学 | Fault diagnosis and feedback system according to third octave flutter of high-speed cold rolling mill |
| JP2016153138A (en) * | 2015-02-17 | 2016-08-25 | Ｊｆｅスチール株式会社 | Vibration abnormality detection method and device for cold rolling or temper rolling |
| CN108038553A (en) * | 2017-12-13 | 2018-05-15 | 科大集智数据科技（武汉）有限公司 | Milling equipment state on_line monitoring and diagnostic system and monitoring, diagnosing method |
| JP2019122979A (en) * | 2018-01-16 | 2019-07-25 | Ｊｆｅスチール株式会社 | Abnormal vibration detection method of rolling mill |
| CN110193532A (en) * | 2019-04-28 | 2019-09-03 | 邯郸钢铁集团有限责任公司 | A kind of quick judgement and control method of reel tension fluctuation |
-
2020
- 2020-10-13 CN CN202011091679.1A patent/CN112191691B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63101013A (en) * | 1986-10-15 | 1988-05-06 | Kawasaki Steel Corp | Method and apparatus for detecting abnormal oscillation of cold rolling mill |
| CN1319035A (en) * | 1999-05-27 | 2001-10-24 | 川崎制铁株式会社 | Method and apparatus for detecting chattering of cold rolling mill |
| CN1803326A (en) * | 2006-01-25 | 2006-07-19 | 冶金自动化研究设计院 | Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system |
| CN102107222A (en) * | 2009-12-24 | 2011-06-29 | 上海梅山钢铁股份有限公司 | On-line vibration detection device and method for equipment state of hot finishing mill |
| CN103521531A (en) * | 2013-11-07 | 2014-01-22 | 天津理工大学 | Fault diagnosis and feedback system according to third octave flutter of high-speed cold rolling mill |
| JP2016153138A (en) * | 2015-02-17 | 2016-08-25 | Ｊｆｅスチール株式会社 | Vibration abnormality detection method and device for cold rolling or temper rolling |
| CN108038553A (en) * | 2017-12-13 | 2018-05-15 | 科大集智数据科技（武汉）有限公司 | Milling equipment state on_line monitoring and diagnostic system and monitoring, diagnosing method |
| JP2019122979A (en) * | 2018-01-16 | 2019-07-25 | Ｊｆｅスチール株式会社 | Abnormal vibration detection method of rolling mill |
| CN110193532A (en) * | 2019-04-28 | 2019-09-03 | 邯郸钢铁集团有限责任公司 | A kind of quick judgement and control method of reel tension fluctuation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112191691A (en) | 2021-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109821900B (en) | Online detection method for working abnormity of rolling mill transmission equipment | |
| CN110193532B (en) | Method for quickly judging and controlling tension fluctuation of recoiling machine | |
| CN112191691B (en) | Method for rapidly judging and processing vibration of rolling mill | |
| EP3811481B1 (en) | Method for determination of a location of a short circuit fault in a generator arrangement, generator arrangement, wind turbine, computer program and electronically readable medium | |
| CN101909922A (en) | Electric vehicle control device | |
| CN102478459A (en) | Method and device for monitoring bearing failure of power generator | |
| CN107433521B (en) | Performance test platform of high-speed precise roller grinding head | |
| CN103080483B (en) | For controlling the method for turbines | |
| CN108114990B (en) | A kind of control method preventing milling train stall overload protection | |
| CN111413097B (en) | Method for predicting bending fault of main shaft of generator set | |
| CN103762910A (en) | Power balance controlling device and method of multi-motor drive system | |
| CN101750179B (en) | Tension detecting method and device of cloth | |
| CN116146517B (en) | Intelligent monitoring system and method for magnetic suspension molecular pump | |
| CN111641367A (en) | Magnetic suspension bearing control system based on motor running state and control method thereof | |
| CN208334589U (en) | A kind of detection device under motor transmission system bringing onto load operating status | |
| Solanki et al. | Determination of faults in 3–Ø induction motor by motor current signature analysis | |
| CN110542555A (en) | Method for judging working abnormity of magnetic suspension bearing | |
| CN203644472U (en) | Constant-tension wire unreeling device | |
| CN110369516B (en) | Main transmission fault interruption control method for reversible universal type steel roughing mill group rolling mill | |
| CN112526339B (en) | Polynomial-phase transformation-based squirrel-cage motor rotor broken bar fault diagnosis method | |
| CN114243651A (en) | Power distribution network differential protection communication rate control method and system based on 5G communication | |
| Kumar et al. | Effect of wear and tear bearing fault in induction motor drives using FEM | |
| CN111940515A (en) | Same-plate difference control method based on edge absolute thickness | |
| CN105466685A (en) | Detection method of energy storage state of circuit breaker operating spring | |
| CN115076233B (en) | Magnetic levitation motor, control method and device thereof and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |