CN109821900A - A kind of online test method of mill drive equipment operation irregularity - Google Patents
A kind of online test method of mill drive equipment operation irregularity Download PDFInfo
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- CN109821900A CN109821900A CN201910137632.5A CN201910137632A CN109821900A CN 109821900 A CN109821900 A CN 109821900A CN 201910137632 A CN201910137632 A CN 201910137632A CN 109821900 A CN109821900 A CN 109821900A
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Abstract
The present invention relates to a kind of online test methods of mill drive equipment operation irregularity, belong to metallurgical equipment automatic control technology field.Technical solution is: frequency conversion tank output torque is equal to the operation torque of load under steady-working state, the load torque is equal to the operation torque of milling train and from motor to the sum of the torque loss of milling train intermediate transmission link, when exception occur in milling train and its transmission intermediate link, the amplitude and change rate that will cause frequency conversion tank output torque change；Judge whether drive apparatus operation irregularity occurs by the amplitude variation and change rate size of programmable controller real-time detection frequency conversion tank output torque；Pass through HMI computer alert if abnormal.The present invention can detect in time unit exception within the drive apparatus entire duty cycle and alarm, and avoid fault spread, and the detection method is easy, and accuracy rate is high, and significant effect has highly application value.
Description
Technical field
The present invention relates to a kind of online test methods of mill drive equipment operation irregularity, belong to metallurgical equipment automatic control
Technical field.
Background technique
In the Rolling production of metallurgy industry, since mill drive machine utilization is big, the probability of occurrence of equipment failure is high, warp
Often occur milling train burn bearing, speed reducer beat tooth, roll breakage, the transmission bad initiation of control cabinet component capabilities the things such as frequency conversion tank booster
Therefore；Such accident is once occur, and it will cause substantial equipments and production loss.If can when drive apparatus just exception occurs
Discovery in time checks in time and processing, it is likely that eliminates accident in budding state, is reduced or avoided resulting from great
Loss.Currently, steel rolling drive apparatus fault detection method, first is that manually checked to mechanical transmission, but cannot achieve to setting
Standby real-time detection；Second is that being alarmed by drive apparatus overcurrent come detection device exception, but for being not up to overcurrent alarm
Unit exception it is then helpless；Third is that using the vibration wave of vibration-measuring sensor detection gearing, by being analyzed and determined to it
Whether mechanical equipment is abnormal, and because rolling machinery operating condition is exactly that impact is big, vibration is big, and vibration wave is not equipment working condition
True reflection, therefore this method application effect on steel rolling equipment is bad.
Summary of the invention
It is an object of the present invention to provide a kind of online test methods of mill drive equipment operation irregularity, are rolled by real-time detection
The change rate of machine drive apparatus torque and amplitude of variation judge steel rolling drive apparatus with the presence or absence of abnormal, the hair in time if abnormal
It alarms out, avoids fault spread, method is easy, and accuracy rate is high, significant effect, solves the above problem existing for prior art.
The technical solution adopted by the present invention is that:
A kind of online test method of mill drive equipment operation irregularity, frequency conversion tank output torque are equal under steady-working state
The operation torque of load, the operation torque which is equal to milling train are damaged with from motor to the torque of milling train intermediate transmission link
The sum of lose, when exception occur in milling train and its transmission intermediate link, (rolling mill bearing damage, speed reducer driving shaft are beaten tooth etc. and are set
The unusual condition of slave component), the amplitude and change rate that will cause frequency conversion tank output torque change；Pass through programmable controller
The amplitude of real-time detection frequency conversion tank output torque changes and change rate size judges whether drive apparatus operation irregularity occurs；If
It is abnormal then pass through HMI computer alert.
Mill drive equipment running status is divided into light condition and load condition, and state is acquired by programmable controller
Frequency conversion tank output torque characteristic value that the output quantity of frequency conversion tank output torque is converted with two kinds of working conditions is distinguished；The state turns
The torque value after characteristic value is weighted with no-load torque is changed to be arranged；
When mill drive equipment is in light condition, no-load torque is essentially a steady state value, and in the range of a very little
It changes up and down, when no-load torque variation significantly exceeds the fluctuation range, control system issues alarm in time；The fault alarm threshold
Value is arranged after being weighted according to the virtual condition of steel rolling equipment load to normal no-load torque.
The load torque of milling train is generally relatively more steady in the rolled piece operation of rolling, when transmission system exception, the load of milling train
Torque variations and change rate change greatly, and when the two numerical value is more than the threshold value of setting, that is, issue alarm.
For rolling mill transmission system in unloaded and load transfer, transmission system output torque has a Dynamic Regulating Process,
The process can be such that torque is distorted because of overshoot, and needing to be delayed to output torque in two states conversion samples, delay time root
Factually the dynamic regulation performance of border transmission system determines.
Torque of the present invention to the light condition of mill drive equipment and the drive apparatus of load condition entire duty cycle
Variation carries out real-time monitoring, guarantees the monitoring to drive apparatus without dead angle.
The invention has the advantages that: the change rates and variation width by real-time detection mill drive equipment frequency conversion tank output torque
Size is spent to judge steel rolling drive apparatus with the presence or absence of abnormal, the sending alarm in time if abnormal.The present invention is that steel rolling transmission is set
The innovation of standby on-line fault diagnosis technology, can detect in time unit exception within the drive apparatus entire duty cycle and report
It is alert, fault spread is avoided, the detection method is easy, and accuracy rate is high, and significant effect has highly application value.
Detailed description of the invention
Fig. 1 is system schematic of the embodiment of the present invention；
It is marked in figure as follows: programmable controller 1, frequency conversion tank 2, HMI computer 3, motor 4, speed reducer 5, milling train 6, transmission shaft
7, electricity subtracts connecting shaft 8, PROFIBUS network 9, Ethernet 10；
Typical torque curve when Fig. 2 is mill drive equipment operation irregularity of the embodiment of the present invention；
It is marked in figure as follows: t1For milling train zero load starting point, t2Terminate initial point (and the starting of load condition for milling train zero load
Point), t3End point, T for milling train load condition0Torque value, the T of state are carried for mill drive equipment normal spatiotemporal1For milling train biography
Torque alarm threshold value, the T of light condition when dynamic unit exceptionKIt is special to distinguish the zero load of mill drive equipment and the torque of load condition
Value indicative (it is light condition that actual torque, which is less than the value, is otherwise load condition), a, allusion quotation when b, c are drive apparatus operation irregularity
Type torque trip point.
Specific embodiment
Below in conjunction with attached drawing, by embodiment, the present invention will be further described.
A kind of online test method of mill drive equipment operation irregularity, frequency conversion tank output torque is under steady-working state
Equal to the operation torque of load, which is equal to the operation torque of milling train and turning from motor to milling train intermediate transmission link
The sum of square loss, when exception occur in milling train and its transmission intermediate link, (such as rolling mill bearing damage, speed reducer driving shaft beat tooth
The unusual condition of equal apparatus assemblies), the amplitude and change rate that will cause frequency conversion tank output torque change；Pass through programmable control
The amplitude of device real-time detection frequency conversion tank output torque processed changes and change rate size judges it is different whether drive apparatus work occurs
Often；Pass through HMI computer alert if abnormal.
Mill drive equipment running status is divided into light condition and load condition, and state is acquired by programmable controller
Frequency conversion tank output torque characteristic value that the output quantity of frequency conversion tank output torque is converted with two kinds of working conditions is distinguished；The state turns
The torque value after characteristic value is weighted with no-load torque is changed to be arranged；
1, mill drive equipment is in light condition
For milling train, the normal driving torque of light condition changes up and down in the range of a very little, and essentially one
Steady state value it is abnormal then to illustrate that the drive apparatus occurs, control system is sent out in time when actual torque significantly exceeds the fluctuation range
It alarms out；The light condition fault alarm threshold value is arranged after being weighted according to the normal no-load torque of steel rolling equipment；
2, mill drive equipment is in produce load state
The state be divided into rolled piece bite milling train, rolled piece rolling in, rolled piece tail portion be detached from milling train three phases；
A, rolled piece bites milling train
When rolled piece bites milling train, since drive apparatus load increases suddenly, frequency conversion tank impact load has one to adjust in short-term
Journey, which there are problems that making data distortion because of torque overshoot, therefore answer delay sampling, delay time and frequency conversion tank
Adjustment parameter is related, generally Millisecond；
B, in the rolled piece operation of rolling
Milling train torque is generally relatively more steady in the rolled piece operation of rolling, and variation is gentle, generally can be in its turn when transmission system exception
It is embodied in square index, the amplitude of variation and change rate of torque can be obvious, pass through the change of this two indexs of real-time detection
Change situation, so that it may detect drive apparatus with the presence or absence of abnormal；Alarm is issued if abnormal；
C, rolled piece tail portion is detached from milling train process
When rolled piece tail portion is detached from milling train, driving torque is down to the suddenly change of no-load torque by load torque, and frequency conversion tank equally has
One adjustment process, the judgment method and milling train of separating signal bite signal similarly；That is: rolled piece is detached from milling train signal with real-time
The torque load(ing) of sampling converts moment characteristics value lower than state as decision condition；Delay sampling is also answered in torque after state conversion, is prolonged
The slow time is according to the dynamic regulation parameter setting of frequency conversion tank.
In embodiment, referring to attached drawing 1, hardware device of the present invention include: programmable controller 1, frequency conversion tank 2,
Motor 3, electricity subtract connecting shaft 4, speed reducer 5, transmission shaft 6, milling train 7, HMI computer 8, PROFIBUS network 9, Ethernet 10.
It is shown in Fig. 1, programmable controller 1 is connected with frequency conversion tank 2 by controlling network 9, and frequency conversion tank 2 is that motor 3 provides
Variable-frequency power sources, motor 3 subtract connecting shaft 4 by electricity and connect speed reducer 5, and speed reducer 5 drives milling train 7 to operate by transmission shaft 6, HMI
Computer is connected with programmable controller 1 by Ethernet 10.Programmable controller presses certain sampling period by communication network
(Millisecond) acquires the torque value of frequency conversion tank and storage, analyzes and determines for the operation conditions to drive apparatus.
2 output torque of frequency conversion tank is passed equal to the operation torque of milling train among motor to milling train under steady-working state
The sum of the torque loss of rotating ring section, when abnormal, such as rolling mill bearing damage, speed reducer biography occur in milling train and its transmission intermediate link
The output torque that the unusual condition that moving axis beats the mechanical components such as tooth will cause frequency conversion tank changes, such as milling train zero load shape in Fig. 2
State t1~t2For normal condition, from t2~t3After a point jumps, the torque in subsequent zero load stage becomes for the torque of load stage
Height, subsequent band load stage torque is also unstable, and jump is frequent, such as b point, c point.
The present invention realizes that the operation irregularity in drive apparatus unloaded stage judges using following method.The stage due to torque compared with
Small, even if there is torque jump, change rate is also smaller, is not easy to accurately distinguish.And it is simple and practical to compare rule using alarm threshold value,
As shown in Fig. 2, according to normal no-load torque value T0Rationally determine torque alarm threshold value T when unit exception1, for example the transmission sets
It is different as torque then can be greater than 20% nominal torque within the scope of 13%-15% nominal torque by normal torque for torque when standby unloaded
Normal alarm threshold value.If programmable controller detects that the frequency conversion tank reality output torque in unloaded stage is greater than T1, then biography is issued
Dynamic status of equipment abnormal alarm.
The present invention realizes the judgement of drive apparatus load stage operation irregularity using following methods.The stage load torque compared with
Greatly, the change rate and amplitude of variation loaded when equipment is abnormal is obvious, since change rate is amplitude of variation and when computation interval
Between section ratio, when the period, value was smaller, amplitude of variation can represent the size of change rate.When turning in certain period of time
When square amplitude of variation numerical value is more than the threshold value of setting, i.e. sending drive apparatus operates abnormal alarm.
A time detection window, window size should be according to the dynamic of transmission system to be determined to the torque value in the operation of rolling first
State property can and the torque sampling period determine that (such as 50 milliseconds of the torque sampling period, dynamic adjustment time is 150 milliseconds, then the time
Detection window can be used 400 milliseconds), the driving torque in window ranges is sampled and stored, following torque value sequence is established
Column:
Buff=(t1, t2 ,..., tn)
Except t1Outside, remaining sampled value in sequence is ranked up, removes a certain number of maximum values and minimum value in sequence,
The summation of remaining numerical value is averaged again, it is therefore an objective to the shadow of pulsating torque and random torque to torque true value in elimination capacity torque
It rings.Current sample values t1It is made the difference again with the average value, which is compared with the alarm threshold value of setting, if being more than warning level
Value then issues alarm on HMI computer picture.If the difference then illustrates that drive apparatus has occurred such as less than 0 when alarm
Milling train roll breakage, transmission shaft beat the unit exception that the loads such as tooth reduce suddenly, if the value is greater than 0 when alarm, illustrate that transmission is set
The standby drive apparatus unusual condition that the loads such as milling train " burn bearing ", motor ground connection have occurred and increase suddenly, can be according to transmission
Corresponding warning message is arranged in feature performance when unit exception.
Newest torque sampled value will be updated the t in sequence1Value, former t1~ tn-1Successively replace the T in former sequence2~TNValue,
New torque value sequence is formed, ensure that the real-time of detection window.Programmable controller carries out new torque sequence again
Above-mentioned analytical judgment realizes the real-time detection to drive apparatus working condition.
The judgement of drive apparatus zero load and load condition is the numerical value of the centre using normal load and no-load torque come area
Divide (the T in such as Fig. 2k), such as normal no-load torque is 15% nominal torque, and normal load is all in 40% nominal torque, then TkIt is optional
Select differentiation standard of 25% nominal torque as the two.
When unloaded and load transfer, since transmission system has the Dynamic Regulating Process (process in load change
Regulating time is very short, generally Millisecond), which can be such that torque is distorted because of overshoot, therefore need in two states conversion
Delay sampling, delay time is determining according to the dynamic regulation performance of actual transmission system, such as 200 milliseconds.
Claims (5)
1. a kind of online test method of mill drive equipment operation irregularity, it is characterised in that: frequency conversion tank output torque is in stabilization
It is equal to the operation torque of load under working condition, which is equal to the operation torque of milling train and the centre from motor to milling train passes
The sum of the torque loss of rotating ring section will cause the width of frequency conversion tank output torque when milling train and its transmission intermediate link appearance exception
Degree and change rate change；Greatly by the amplitude variation of programmable controller real-time detection frequency conversion tank output torque and change rate
It is small to judge whether drive apparatus operation irregularity occurs；Pass through HMI computer alert if abnormal.
2. a kind of online test method of mill drive equipment operation irregularity according to claim 1, it is characterised in that: roll
Machine drive apparatus operating status is divided into light condition and load condition, and state acquires frequency conversion tank by programmable controller and exports
Frequency conversion tank output torque characteristic value that the output quantity of torque is converted with two kinds of working conditions is distinguished.
3. a kind of online test method of mill drive equipment operation irregularity according to claim 2, it is characterised in that: roll
When machine drive apparatus is in light condition, no-load torque is essentially a steady state value, and becomes up and down in the range of a very little
Dynamic, when no-load torque variation significantly exceeds the fluctuation range, control system issues alarm in time.
4. a kind of online test method of mill drive equipment operation irregularity according to claim 2, it is characterised in that: roll
The load torque of milling train is generally relatively more steady in the part operation of rolling, and when transmission system exception, the load torque of milling train changes width
Degree and change rate change greatly, and when the two numerical value is more than the threshold value of setting, that is, issue alarm.
5. a kind of online test method of mill drive equipment operation irregularity according to claim 2, it is characterised in that: roll
For machine transmission system in unloaded and load transfer, transmission system output torque has a Dynamic Regulating Process, which can make
Torque is distorted because of overshoot, and needing to be delayed to output torque in two states conversion samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137632.5A CN109821900B (en) | 2019-02-25 | 2019-02-25 | Online detection method for working abnormity of rolling mill transmission equipment |
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| CN201910137632.5A CN109821900B (en) | 2019-02-25 | 2019-02-25 | Online detection method for working abnormity of rolling mill transmission equipment |
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| CN109821900B CN109821900B (en) | 2020-07-14 |
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Cited By (6)
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| CN111889521A (en) * | 2020-06-29 | 2020-11-06 | 石家庄钢铁有限责任公司 | Control device and method for reducing damage degree of steel pile of continuous rolling unit |
| CN112355059A (en) * | 2020-12-17 | 2021-02-12 | 福建三钢闽光股份有限公司 | Fault detection method for heavy and medium plate mill stand roller |
| CN112404138A (en) * | 2020-09-23 | 2021-02-26 | 广东韶钢松山股份有限公司 | Control method and system for lifting mechanism of vertical rolling mill |
| CN112737419A (en) * | 2020-12-28 | 2021-04-30 | 西门子工厂自动化工程有限公司 | Conveyor control method, conveyor control system, electronic device, medium, and program |
| CN113686569A (en) * | 2021-08-19 | 2021-11-23 | 深圳市汇川技术股份有限公司 | Transmission mechanism torque detection method, device, equipment and storage medium |
| CN116809652A (en) * | 2023-03-28 | 2023-09-29 | 材谷金带(佛山)金属复合材料有限公司 | Abnormality analysis method and system for hot rolling mill control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112404138A (en) * | 2020-09-23 | 2021-02-26 | 广东韶钢松山股份有限公司 | Control method and system for lifting mechanism of vertical rolling mill |
| CN112355059A (en) * | 2020-12-17 | 2021-02-12 | 福建三钢闽光股份有限公司 | Fault detection method for heavy and medium plate mill stand roller |
| CN112737419A (en) * | 2020-12-28 | 2021-04-30 | 西门子工厂自动化工程有限公司 | Conveyor control method, conveyor control system, electronic device, medium, and program |
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| CN113686569A (en) * | 2021-08-19 | 2021-11-23 | 深圳市汇川技术股份有限公司 | Transmission mechanism torque detection method, device, equipment and storage medium |
| CN116809652A (en) * | 2023-03-28 | 2023-09-29 | 材谷金带(佛山)金属复合材料有限公司 | Abnormality analysis method and system for hot rolling mill control system |
| CN116809652B (en) * | 2023-03-28 | 2024-04-26 | 材谷金带(佛山)金属复合材料有限公司 | Abnormality analysis method and system for hot rolling mill control system |
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