CN102688892B - On-line monitoring method for state of safety pin of rolling mill transmission mechanism - Google Patents
On-line monitoring method for state of safety pin of rolling mill transmission mechanism Download PDFInfo
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- CN102688892B CN102688892B CN201210035245.9A CN201210035245A CN102688892B CN 102688892 B CN102688892 B CN 102688892B CN 201210035245 A CN201210035245 A CN 201210035245A CN 102688892 B CN102688892 B CN 102688892B
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Abstract
The invention discloses an on-line monitoring method for state of a safety pin of a rolling mill transmission mechanism; in the steel biting and normal milling processes of the rolling mill, the safety pin is broken normally when the instantaneous impact load torque of the rolling mill is 1.1-1.6TdM and the motor recovery rate is equal to or greater than 300rpm; the safety pin is sheared due to ultralimit torque shearing when the instantaneous impact load torque is greater than 1.6TdM and the motor recovery rate is more than 400rpm; the safety pin is not broken as required when the instantaneous impact load torque is greater than 1.6TdM and the motor recovery rate is less than 400rpm; and in the normal rolling process of a continuous rolling unit, main transmission motors of the rest racks except the first rack in the continuous rolling unit are accelerated suddenly at the speed of 150rmp under the condition of existence of steel still in the upper-course racks of the rest racks, and the safety pin is in fatigue failure within 700ms after the speed of the motors is accelerated suddenly and the motor output torque moment less than 5% TdN is kept for more than 150ms.
Description
Technical field
The invention belongs to milling train security protection technology neck, relate in particular to the on-line monitoring method of milling train transmission mechanism safety pin state.
Background technology
Chinese patent " the inline diagnosis method of rift of rolling mill transmission mechanism safety pin ", the patent No. 200710191295.5, has introduced a kind of inline diagnosis method of rift of rolling mill transmission mechanism safety pin.The method can inline diagnosis safety pin be to occur in the fracture that the instantaneous heavy load of milling train is impacted, or fatigue fracture.But; it is the normal protection fracture under instantaneous heavy load is impacted that the method fails further to distinguish safety pin; or cut off under ultralimit cutting torsion; and the method can not be to safety pin this cut off and the state do not cut off is diagnosed, also there is the problem not high to fatigue fracture accuracy rate of diagnosis in the method.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of on-line monitoring method of milling train transmission mechanism safety pin state, the present invention can carry out overall monitor to the presence of safety pin, on-line monitoring safety pin whether occurred to be subject to heavy load impact and normal rupture, this cut off and do not cut off, phenomenon that fatigue fracture and ultralimit cutting torsion are cut off.
For solving the problems of the technologies described above, the on-line monitoring method of a kind of milling train transmission mechanism safety pin state provided by the invention, it is characterized in that, sting in steel and the normal operation of rolling at milling train, if having reached main drive motor maximum, milling train temporary impact load torque allows 1.1～1.6 times of output torque, main drive motor actual speed rises by suddenly declining to being transformed into suddenly, and maximum momentary speed variation is greater than 300 revs/min/second, and normal protection fracture has occurred milling train transmission mechanism safety pin; If being greater than Main Drive of Rolling Mill motor maximum, the temporary impact load torque of milling train allows output 1.6 times of torque, electromotor velocity rise speed is greater than 400 revs/min/second, and the abnormality that ultralimit cutting torsion is cut off has occurred milling train transmission mechanism safety pin; Allow output 1.6 times of torque if the temporary impact load torque of milling train is greater than Main Drive of Rolling Mill motor maximum, electromotor velocity rise speed is less than 400 revs/min/second, and milling train transmission mechanism safety pin this has occurred is cut off and the abnormal state do not cut off; In the normal operation of rolling of tandem rolling unit, all the other frame main drive motors except first frame of tandem rolling unit still have in frame at its upstream in the situation of steel and occur suddenly raising speed, raising speed speed is more than 150 revs/min/second, simultaneously at motor suddenly in the 700 millisecond times of speed after rising, motor output torque drop to 5% motor nominal torque is following also can be continued more than 150 milliseconds, and fatigue fracture has occurred milling train transmission mechanism safety pin.
In order to prevent that milling train transmission mechanism is subject to instantaneous heavy load impact and damage, and arranges protection safety pin conventionally on its driving-chain.We know, for one group of new safety pin of milling train transmission mechanism, before coming into operation, the large young pathbreaker of its actual cutting torsion is depended on many-sided factor, as material and the machining accuracy etc. of safety pin; After coming into operation, the size of its actual cutting torsion also will depend on precision and the fatigue impact situation of installation.This that is to say, even be provided with protection safety pin on milling train transmission driving-chain, if safety pin improper use, milling train transmission mechanism protection safety pin will inevitably occur failing to act when one should and maybe should not break and disconnected phenomenon.So, for the transmission mechanism protection safety pin that makes milling train is brought into play its safeguard protection effect effectively, just must carry out overall monitor to the presence of safety pin, be whether on-line monitoring safety pin this has occurred is cut off and cut off, this is cut off and is not cut off, should not cut off and cut off and phenomenon that ultralimit cutting torsion is cut off, once there is above-mentioned phenomenon in milling train transmission mechanism safety pin, mill control system will provide corresponding fault message in time, being convenient to like this plant maintenance personnel supervises the use state of milling train especially tandem mill transmission mechanism protection safety pin, avoid the generation that repeats of this problem, make thus milling train transmission mechanism protection safety pin be in all the time slave mode.For this reason, we have designed a kind of on-line monitoring method of milling train transmission mechanism safety pin state independently, it is normal rupture or the safety pin fatigue fracture due to instantaneous heavy load is impacted that the method not only can inline diagnosis goes out safety pin, and this is cut off and does not cut off and malfunction that ultralimit cutting torsion is cut off can also to diagnose out safety pin.The method has dropped into trial run in January, 2012 at Ma Gang little H continuous rolling production line, and practical effect is fine.
In order to obtain the on-line monitoring method of reliable and stable safety pin state, just must fully understand the relation between the feature that the state of milling train transmission mechanism safety pin under the various accident conditions of milling train and main drive motor actual speed and actual output torque present.By the research of main drive motor actual speed under a large amount of milling train accident conditions and actual output torque characteristic is found: sting in steel and the normal operation of rolling at milling train (1), if milling train temporary impact load torque has reached Main Drive of Rolling Mill motor maximum while allowing between 1.1～1.6 times of output torque, there is fracture in milling train transmission mechanism safety pin, and after shear pin breakage, main drive motor actual speed rises by suddenly declining to being transformed into suddenly, maximum momentary speed variation is greater than 300 revs/min/second, illustrate that normal protection fracture has occurred milling train transmission mechanism safety pin, be illustrated in fig. 1 shown below, (2) sting in steel and the normal operation of rolling at milling train, if being greater than Main Drive of Rolling Mill motor maximum, the temporary impact load torque of milling train allows output 1.6 times of torque (conventionally the limit cutting torsion of safety pin be about motor maximum allow 1.4 times of output torque), and in the Main Drive of Rolling Mill electromotor velocity rise process after load instantaneous is impacted, electromotor velocity rise speed is greater than 400 revs/min/second, illustrate that the abnormality that ultralimit cutting torsion is cut off has occurred milling train transmission mechanism safety pin, is illustrated in fig. 2 shown below, the temporary impact load torque of milling train is greater than Main Drive of Rolling Mill motor maximum and allows output 1.6 times of torque, if electromotor velocity rise speed is less than 400 revs/min/second, illustrate that milling train transmission mechanism safety pin this has occurred and cut off and the abnormal state do not cut off, be illustrated in fig. 3 shown below, (3) in the normal operation of rolling of tandem rolling unit, all the other frame main drive motors except first frame of tandem rolling unit still have in frame (being supplied materials frame) at its upstream in the situation of steel and occur suddenly raising speed (raising speed speed is more than 150 revs/min/second), simultaneously at motor suddenly in the 700 millisecond times of speed after rising, motor output torque drop to 5% motor nominal torque is following also can be continued more than 150 milliseconds, and there is not normal protection fracture and the fracture of ultralimit moment of torsion down cut in safety pin, illustrate that the improper fracture occurring because of tired has occurred this milling train transmission mechanism safety pin, be illustrated in fig. 4 shown below, (4) actual speed of milling train main drive motor under temporary impact load effect is not the straight line reduction of speed with a constant-slope, but suddenly decline with the form of straight lines of multistage Different Slope, in other words, because of moment, to roll that temporary impact that card produces loads in whole milling train jam process be a variable quantity to milling train, like this, whether diagnosis transmission mechanism safety pin there is fracture in rolling card process in milling train moment, just must calculate the different section maximum load torques of bearing of milling train transmission mechanism safety pin in the process of milling train load shock and whether reach its minimum cutting torsion value (the 1.1 times of maximum permission output of motor torques), (5) fracture of milling train transmission mechanism safety pin is not only relevant with the size of milling train temporary impact load, and relevant with the action time length of temporary impact load, temporary impact load is larger, the time of effect is longer, just more easily there is fracture accident in safety pin, for little H shape rolling mill, if larger impact load continues more than 40 milliseconds, conventionally can make milling train transmission mechanism safety pin rupture.Below main drive motor actual speed and actual output torque waveform under the given 4 kinds of typicalnesses of milling train transmission mechanism safety pin of milling train data acquisition and display system.
By the above-mentioned research to the relation between 4 kinds of typicalnesses of milling train transmission mechanism safety pin and main drive motor actual speed and actual output torque characteristic, we are known, realize the on-line monitoring of milling train transmission mechanism safety pin state, key is how to calculate in real time online the actual shearing moment of torsion of milling train transmission mechanism safety pin, converts the milling train actual loading moment of torsion on main drive motor output shaft.Under the prerequisite of computing capability that takes into full account mill control system, in order to obtain the real-time load torque of milling train comparatively accurately and effectively, the inline diagnosis control program of Ma Gang little H shaped steel transmission mechanism safety pin state can be set in 50 milliseconds or following by the sampling period of main drive motor actual speed and actual output torque, and taking 40-50 millisecond as a computing cycle, calculate in real time milling train actual loading torque taking 40-50 millisecond as a time period.For the milling train actual loading torque in each time period or sampling period (as 40 milliseconds), can calculate and obtain by motor torque formula.
GD in formula
2---roll
The whole transmission mechanism of machine is converted the flywheel inertia on motor output shaft, Newton meter
2;
Δ n
i---speed difference between two motor actual speed sampled points (rev/min),
Δn
i＝n
i-n
i-1；
Δ t
i---i time in sampling period, for little H shape rolling mill, each time in sampling period can be set as 40 milliseconds;
T
di---the actual output of the motor torque of i sampled point, Newton meter;
T
li---the motor actual loading torque of i sampled point, i.e. the actual loading torque of milling train, Newton meter.
GD in above formula
2can be by the motor actual speed in milling train transmission mechanism starting under no load process and torque waveform and motor torque formula calculating acquisition.
According to the feature of 4 kinds of above-mentioned typicalnesses of milling train transmission mechanism safety pin, establishing milling train actual loading torque is T
l, specified output torque and the maximum output torque of Main Drive of Rolling Mill motor are respectively T
dNand T
dM(the maximum output torque T of Ma Gang little H shape rolling mill main drive motor
dM(=25kNm) is specified output torque T
dN(=15.5kNm) 1.61 times), existing taking Ma Gang little H continuous section rolling machine as example, provide the on-line monitoring program flow diagram of milling train transmission mechanism safety pin state.
Brief description of the drawings
Below in conjunction with accompanying drawing, detailed description of the invention is elaborated:
Motor actual speed when normal protection fracture occurs Fig. 1 Ma Gang little H shaped steel 15# milling train transmission mechanism safety pin under momentary load is impacted and actual output torque waveform.
Fig. 2. motor actual speed when fracture occurs the little H shaped steel of horse steel 15# milling train transmission mechanism safety pin under ultralimit cutting torsion and output torque waveform.
Motor actual speed when Fig. 3 Ma Gang little H shaped steel 15# milling train transmission mechanism safety pin fracture does not occur under ultralimit cutting torsion and output torque waveform.
Motor actual speed when Fig. 4 Ma Gang little H shaped steel 2# milling train transmission mechanism safety pin, in upstream frame still has the normal operation of rolling of steel, fatigue fracture occurs and actual output torque waveform.
Data sampling and the computing flow chart of Fig. 5 milling train transmission mechanism safety pin state on-line monitoring program.
Fig. 6 milling train transmission mechanism safety pin state on-line monitoring program flow diagram.
Detailed description of the invention
According to the feature of 4 kinds of above-mentioned typicalnesses of milling train transmission mechanism safety pin, establishing milling train actual loading torque is T
l, specified output torque and the maximum output torque of Main Drive of Rolling Mill motor are respectively T
dNand T
dM(the maximum output torque T of Ma Gang little H shape rolling mill main drive motor
dM(=25kNm) is specified output torque T
dN(=15.5kNm) 1.61 times), existing taking Ma Gang little H continuous section rolling machine as example, introduce in detail the on-line monitoring method of milling train transmission mechanism safety pin state.
Ma Gang little H shape rolling mill control system obtains actual speed and the actual output torque of main drive motor from Main Drive of Rolling Mill inverter with the transmission speed of 2Mbps by TOSLINE-S20 communication netting twine.Like this, from upper Fig. 5 and Fig. 6, in order to realize the on-line monitoring of milling train transmission mechanism safety pin state in mill control system, under the as-rolled condition of milling train, the on-line monitoring program of the transmission mechanism safety pin state of mill control system was sampled to the actual speed of Main Drive of Rolling Mill motor and actual output torque with the sampling period of setting, transmission mechanism safety pin state on-line monitoring program is stored main drive motor actual speed and the actual output torque value of current sampling instant and a upper sampling instant all the time, and within each sampling period, calculate current and on the main drive motor actual loading torque of main drive motor actual speed rate of change and current sampling instant in time period between a sampled point.After completing above-mentioned sampling and calculating, first transmission mechanism safety pin state on-line monitoring program judges whether the actual loading torque of current sampling instant main drive motor is between the motor maximum output torque of 1.1～1.6 times or is greater than the motor maximum output torque of 1.6 times: (1) is if the actual loading torque of motor is between the motor maximum output torque of 1.1～1.6 times, illustrate that the motor load torque in time period of a current and upper sampled point is excessive, likely cause transmission mechanism shear pin breakage, transmission mechanism safety pin state on-line monitoring program will judge whether the actual speed rate of change at this sampling time section built-in motor is less than and equals zero like this, if the actual speed rate of change of motor is less than or equal to zero, this shows that the load torque of motor is still more than or equal to the actual output torque of motor, also show that transmission mechanism safety pin does not also rupture simultaneously.Analysis by a large amount of shear pin breakage accidents is known, the momentary load of milling train is impacted may continue several sampling periods sometimes, within these sampling periods, the size of load torque is also by different, some sampling sections, load torque is impacted quite large, and what have is quite little, and transmission mechanism safety pin does not at once rupture sometimes within the large sampling period of load shock, but resolve and split under follow-up less load shock.Given this, be in once corresponding certain sampled point motor actual loading torque between the motor maximum output torque of 1.1～1.6 times, transmission mechanism safety pin state on-line monitoring program will judge whether a motor actual speed rate of change is still less than or equal to zero in each sampling period, if motor actual speed rate of change becomes the state that is greater than zero, transmission mechanism safety pin state on-line monitoring program will judge whether motor actual speed rate of change is more than or equal to 300 revs/min/second, if set up, illustrate that milling train transmission mechanism safety pin, after the instantaneous heavy load of milling train is impacted, fracture has occurred, like this, transmission mechanism safety pin state on-line monitoring program will be blocked the enable signal of the each Main Drive of Rolling Mill inverter of tandem rolling unit at once, make tandem rolling unit free parking, this monitoring programme provides the information of the normal protection fracture of this frame transmission mechanism safety pin generation simultaneously, if be false, in the process that milling train transmission mechanism safety pin impacts in whole milling train momentary load, do not rupture, like this, transmission mechanism safety pin state on-line monitoring program starts again to continue judge whether the actual loading torque of next one sampling period motor is between the motor maximum output torque of 1.1～1.6 times, (2) if the motor maximum output torque that the actual loading torque of motor is greater than 1.6 times, illustrate that the motor load torque in time period of a current and upper sampled point has exceeded the limit cutting torsion of safety pin, likely cause transmission mechanism shear pin breakage, transmission mechanism safety pin state on-line monitoring program will judge whether the actual speed rate of change at this sampling time section built-in motor is less than and equals zero like this, if the actual speed rate of change of motor is less than or equal to zero, this shows that the load torque of motor is still more than or equal to the actual output torque of motor, also show that transmission mechanism safety pin does not also rupture simultaneously.Like this, transmission mechanism safety pin state on-line monitoring program will judge whether a motor actual speed rate of change is still less than or equal to zero in each sampling period, if motor actual speed rate of change becomes the state that is greater than zero, transmission mechanism safety pin state on-line monitoring program will judge whether motor actual speed rate of change is more than or equal to 400 revs/min/second, if set up, illustrate that milling train transmission mechanism safety pin resolves and split under ultralimit cutting torsion, like this, transmission mechanism safety pin state on-line monitoring program will be blocked the enable signal of the each Main Drive of Rolling Mill inverter of tandem rolling unit at once, make tandem rolling unit free parking, this monitoring programme provides the information that this frame transmission mechanism safety pin ruptures under ultralimit cutting torsion simultaneously, if be false, milling train transmission mechanism safety pin does not rupture under ultralimit cutting torsion, be that milling train transmission mechanism safety pin this has occurred is cut off and the anomaly of not cutting off, like this, transmission mechanism safety pin state on-line monitoring program starts again to continue to judge whether the actual loading torque of next one sampling period motor is greater than the motor maximum output torque of 1.6 times, and this monitoring programme provides this frame transmission mechanism safety pin information that generation is ruptured under ultralimit cutting torsion simultaneously.
Above-mentioned control program has solved the on-line monitoring at milling train heavy load temporary impact lower transmission mechanism safety pin state, and for the diagnosis of milling train transmission mechanism safety pin fatigue fracture, consider that first milling train of tandem rolling unit (being tandem rolling unit entrance milling train) is different with the mode of the fatigue fracture diagnosis of all the other milling train safety pins, so, in this safety pin condition monitoring program, be provided with respectively the little fatigue fracture diagnosis unit of all the other milling train safety of first milling train safety pin fatigue fracture diagnosis unit of tandem rolling unit and tandem rolling unit.For the condition diagnosing of first milling train transmission mechanism safety pin fatigue fracture of tandem rolling unit, known by all size rolled piece being thrown in milling train to the observation of tail: milling train is thrown the rate of change of the actual speed of its main drive motor in tail process conventionally about 80～250 revs/min/second, all be less than 300 revs/min/second, suddenly milling train was thrown its main drive motor actual speed in tail process and was directly proportional with the actual output interconversion rate of torque and the actual loading torque of milling train about 250 milliseconds of left and right fall time in its motor output torque; In milling train transmission mechanism safety pin generation fatigue fracture moment, the variation characteristic of Main Drive of Rolling Mill motor actual speed and actual output torque is sometimes similar with the variation characteristic of actual output torque to motor actual speed in milling train throwing tail process.So, in order to ensure the reliability of first milling train transmission mechanism safety pin fatigue fracture diagnosis of tandem rolling unit, we are set as the conditions for diagnostics of this milling train transmission mechanism safety pin generation fatigue fracture: in the operation of rolling, when the rate of change of Main Drive of Rolling Mill motor actual speed is more than or equal to 300 revs/min/second, and below output torque drop to the 5% motor nominal torque of 300 milliseconds of time built-in motors after this, there is not normal protection fracture and rupture under ultralimit cutting torsion in milling train transmission mechanism safety pin simultaneously, there is fatigue fracture in this milling train transmission mechanism safety pin.The above-mentioned feature that this safety pin condition diagnosing program shows during just according to first milling train transmission mechanism safety pin generation fatigue fracture of tandem rolling unit is carried out inline diagnosis to this milling train safety pin fatigue fracture state.Equally, for the condition diagnosing of all the other milling train transmission mechanism safety pin fatigue fractures of tandem rolling unit, following four features that this safety pin condition diagnosing program shows during according to these milling train generation safety pin fatigue fractures judge whether each milling train safety pin fatigue fracture has occurred: (1), in the normal operation of rolling, the actual speed rate of change (dn/dt) of Main Drive of Rolling Mill motor has occurred being more than or equal to 150 revs/min/second; (2) from there are being more than or equal to 150 revs/min of/second moment in this Main Drive of Rolling Mill motor actual speed rate of change (dn/dt), within 700 milliseconds of times, the actual output torque of this Main Drive of Rolling Mill motor drops to below 5% of the specified output torque of motor, and has continued 150 milliseconds or above time; (3) in the upstream frame of this milling train, still there is steel; (4) there is not normal protection fracture and rupture under ultralimit cutting torsion in this milling train safety pin.In the design of this safety pin condition diagnosing program, while there is fatigue fracture in view of milling train transmission mechanism safety pin in the normal operation of rolling, when the actual speed of Main Drive of Rolling Mill motor is normally thrown tail with the variation characteristic of actual output torque to milling train, the actual speed of its main drive motor is very similar with the variation characteristic of actual output torque.So, in order to prevent that milling train is thrown to shape of tail state is mistaken for rift of rolling mill transmission mechanism safety pin state, will in the frame of upstream, still have one of condition of steel all the other milling train transmission mechanism safety pin fatigue fracture monitoring except first milling train as tandem rolling unit, by known to the research of a large amount of rift of rolling mill transmission mechanism safety pin accidents: the form that fracture occurs milling train transmission mechanism safety pin mainly contains two kinds, one is that milling train transmission mechanism safety pin occurred is cut off moment, and the sheared edge section of safety pin is more smooth, after safety pin occurs in this case cutting off, the actual speed climbing of Main Drive of Rolling Mill motor is conventionally more than 400 revs/min/second, and main drive motor output torque meeting rapidly (conventionally be less than in time a few tens of milliseconds) is reduced to the no-load torque 1.5% left and right of the specified output torque of motor (conventionally) of main drive motor self, another is that fracture appears in milling train transmission mechanism safety pin in the operation of rolling, but the sheared edge of safety pin is not by concordant cutting off of moment, it is the phenomenon that the sheared edge of safety pin its transmission side and fore side after fracture still exist dynamic Contact within a period of time (conventionally at 200～250 milliseconds), cause thus Main Drive of Rolling Mill motor output torque after 200～250 milliseconds of safety pin generation fracture, just can be reduced to the no-load torque of motor self, but, even in this case, its climbing of the actual speed of Main Drive of Rolling Mill motor after shear pin breakage is conventionally still more than 200 revs/min/second, in addition owing to will still having one of condition of steel all the other milling train transmission mechanism safety pin fatigue fracture monitoring except first milling train as tandem rolling unit in the frame of upstream, so, all the other milling trains for tandem rolling unit except first milling train, in order to improve the hit rate of milling train safety pin fatigue fracture diagnosis, this safety pin condition diagnosing program detects that using between non-throwing last stage Main Drive of Rolling Mill motor actual speed climbing is more than or equal to 150 revs/min of/second Rule of judgment as these milling train safety pin generation fatigue fractures.Like this, when fatigue fracture appears in the transmission mechanism safety pin of any one milling train of tandem rolling unit, milling train transmission mechanism safety pin state on-line monitoring program will be blocked the enable signal of the each Main Drive of Rolling Mill inverter of tandem rolling unit at once, makes the each frame free parking of tandem rolling unit; Or this safety pin condition diagnosing program is sent signal to mill control system in time, tandem rolling unit is stopped rolling after origin rolled piece, in case steel-fastening appears in the inlet of rolling mill place that next root rolled piece, at milling train transmission mechanism safety pin, fracture occurs, this monitoring programme provides the information of this frame transmission mechanism safety pin generation fatigue fracture simultaneously.
Claims (1)
1. the on-line monitoring method of a milling train transmission mechanism safety pin state, it is characterized in that, sting in steel and the normal operation of rolling at milling train, if having reached main drive motor maximum, milling train temporary impact load torque allows 1.1～1.6 times of output torque, main drive motor actual speed rises by suddenly declining to being transformed into suddenly, maximum momentary speed variation is greater than 300 revs/min/second, and normal protection fracture has occurred milling train transmission mechanism safety pin; If being greater than Main Drive of Rolling Mill motor maximum, the temporary impact load torque of milling train allows output 1.6 times of torque, electromotor velocity rise speed is greater than 400 revs/min/second, and the abnormality that ultralimit cutting torsion is cut off has occurred milling train transmission mechanism safety pin; If being greater than Main Drive of Rolling Mill motor maximum, the temporary impact load torque of milling train allows output the more than 1.6 times of torque, electromotor velocity rise speed is less than 400 revs/min/second, and milling train transmission mechanism safety pin this has occurred is cut off and the abnormal state do not cut off; In the normal operation of rolling of tandem rolling unit, all the other frame main drive motors except first frame of tandem rolling unit still have in frame at its upstream in the situation of steel and occur suddenly raising speed, raising speed speed is more than 150 revs/min/second, simultaneously at motor suddenly in the 700 millisecond times of speed after rising, motor output torque drop to 5% motor nominal torque is following also can be continued more than 150 milliseconds, and fatigue fracture has occurred milling train transmission mechanism safety pin.
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| CN105728472B (en) * | 2016-03-08 | 2017-10-31 | 中冶陕压重工设备有限公司 | The control method of static rolling torsion in a kind of elimination band and strip rolling mill |
| CN109821900B (en) * | 2019-02-25 | 2020-07-14 | 石家庄钢铁有限责任公司 | Online detection method for working abnormity of rolling mill transmission equipment |
| CN109991883A (en) * | 2019-03-29 | 2019-07-09 | 武汉钢铁有限公司 | A kind of equipment safety pin intelligent monitor system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574035Y (en) * | 2002-09-25 | 2003-09-17 | 天津鼎盛工程机械有限公司 | Hydraulic mechanical drive device testing bench |
| CN101017118A (en) * | 2007-02-13 | 2007-08-15 | 上海师范大学 | Test method for performance of high speed engine clutch |
| CN101256136B (en) * | 2007-12-11 | 2010-11-10 | 马鞍山钢铁股份有限公司 | Method of on-line diagnosis of rift of rolling mill transmission mechanism safety pin |
| EP2302346A1 (en) * | 2009-09-29 | 2011-03-30 | Giovanni Mariani | Dynamic test bench for development and trial of endothermic and electric motors, particularly for simulation of road traction |
| CN101451935B (en) * | 2007-12-07 | 2011-05-18 | 马鞍山钢铁股份有限公司 | Actual shearing torquemoment computation method for shear pin of transmission mechanism for bearing impact load |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58215211A (en) * | 1982-06-09 | 1983-12-14 | Hitachi Ltd | Shear pin life monitoring device |
| JPH1110214A (en) * | 1997-06-27 | 1999-01-19 | Kawasaki Steel Corp | Method for preventing overload in driving system for rolling mill |
| JP3480407B2 (en) * | 2000-01-19 | 2003-12-22 | 住友金属工業株式会社 | Retention force calculation device and rolling abnormality detection device |
-
2012
- 2012-02-16 CN CN201210035245.9A patent/CN102688892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574035Y (en) * | 2002-09-25 | 2003-09-17 | 天津鼎盛工程机械有限公司 | Hydraulic mechanical drive device testing bench |
| CN101017118A (en) * | 2007-02-13 | 2007-08-15 | 上海师范大学 | Test method for performance of high speed engine clutch |
| CN101451935B (en) * | 2007-12-07 | 2011-05-18 | 马鞍山钢铁股份有限公司 | Actual shearing torquemoment computation method for shear pin of transmission mechanism for bearing impact load |
| CN101256136B (en) * | 2007-12-11 | 2010-11-10 | 马鞍山钢铁股份有限公司 | Method of on-line diagnosis of rift of rolling mill transmission mechanism safety pin |
| EP2302346A1 (en) * | 2009-09-29 | 2011-03-30 | Giovanni Mariani | Dynamic test bench for development and trial of endothermic and electric motors, particularly for simulation of road traction |
Non-Patent Citations (4)
| Title |
|---|
| 叶光平.轧机安全销实际剪切扭矩的简易计算.《轧钢》.2008,第25卷(第2期),全文. * |
| 王一俊.轧机主传动中安全销疲劳强度的可靠性设计.《重型机械》.1988,(第2期),全文. * |
| 轧机主传动中安全销疲劳强度的可靠性设计;王一俊;《重型机械》;19880229(第2期);全文 * |
| 轧机安全销实际剪切扭矩的简易计算;叶光平;《轧钢》;20080229;第25卷(第2期);全文 * |
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