CN105855488A - Non-sinusoidal oscillation device of continuous casting crystallizer and oscillation method thereof - Google Patents
Non-sinusoidal oscillation device of continuous casting crystallizer and oscillation method thereof Download PDFInfo
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- CN105855488A CN105855488A CN201610305781.4A CN201610305781A CN105855488A CN 105855488 A CN105855488 A CN 105855488A CN 201610305781 A CN201610305781 A CN 201610305781A CN 105855488 A CN105855488 A CN 105855488A
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- gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
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- Mechanical Engineering (AREA)
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- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention provides a non-sinusoidal oscillation device of a continuous casting crystallizer and an oscillation method thereof. The device mainly comprises a variable-frequency motor, a reducer variator, an eccentric shaft and a connecting rod. The invention relates to a method for achieving non-sinusoidal oscillation. The device is characterized in that a driving spur gear and a driven noncircular gear are arranged in a reducer variator housing; an axis of the driving spur gear is vertically intersected with the axis of the driven noncircular gear; an output shaft of the variable-frequency motor is connected to the driving spur gear through a coupling; the driving spur gear is engaged with the driven noncircular gear, and the driven noncircular gear is connected with one end of the eccentric shaft through the coupling; one end of the connecting rod is hinged with the eccentric shaft while the other end of the connecting rod is hinged with an oscillation frame. According to the device, a transmission chain is short; the structure is compact; the device cost is low; sudden stopping, oil leaking and other phenomena can be avoided; the reliability is high; the bearing capacity is high; the control is simple; the waveforms are accurate; the displacement and speed waveforms are smooth and continuous; the acceleration is free of sudden changing; rigid and flexible impacting are avoided; the waveforms and dynamic characteristic properties are outstanding.
Description
Technical field
The invention belongs to continuous casting steel machine technical field.
Technical background
Continuous casting steel machine has significantly in each side such as saving the energy, raising production efficiency and optimization slab quality
Advantage, during pouring molten steel to crystallizer, crystallizer only vibrates according to certain rule,
The lubricating condition of guarantee strand and crystallizer, prevents green shell and crystallizer wall generation bonding from causing drawing motionless
Or rubbish leakage accident.Mold oscillation rule i.e. mold oscillation speed rule over time is that crystallizer shakes
The content of most critical in dynamic technology, along with people are to complicated Physical Mechanism understanding various between strand and crystallizer
Deepening continuously, mold oscillation rule have passed through rectangle speed law, trapezoidal speed law, sinusoidal velocity rule
The developmental stage such as rule, current non-sinusoidal oscillation is acknowledged as realizing the optimum waveform of high efficiency continuous casting, crystallizer
Non-sinusoidal oscillation device becomes the focus of Chinese scholars research.Now, at continuous casting industry mould non-sinusoidal
Vibration generating arrangement substantially has following several:
The most traditional Mechanical Driven non sine vibration generating arrangement.By motor, decelerator, anon-normal can be produced
The mechanical transmission mechanism composition of Chord vibration, such as the Chinese patent of Application No. CN 03143934.9, discloses one
Plant the mould non-sinusoidal vibration device that non-circular gear excites；The China of Application No. CN 99216172.X is specially
Profit proposes anti-parallelogram mechanism non sine vibration generating arrangement etc..These several device transmission chain lengths, knot
Structure is complicated, reduces stationarity and the accuracy of waveform of mold oscillation.
2. the crystallizer non sine vibration generating arrangement that servo hydraulic cylinder drives.Such as Application No. C
The Chinese patent of N201310258729.4, discloses a kind of fluid pressure type bilateral non-sine driving means.This device
It is with certain rule reciprocal telescopic thus to drive vibration table bilateral non-sine to shake by servo controlled type hydraulic cylinder
Dynamic, in that context it may be convenient to produce various vibration regularity, it is achieved the on-line tuning of amplitude, frequency and waveform and monitoring.
But in actual applications, servo hydraulic cylinder also exists system complex, input cost is high, maintenance cost is big etc. lacks
Point；It addition, oil residue blocking pipeline can make to make hydraulic cylinder occur stopping phenomenon steathily, seriously in Gong Zuo
Time can have an accident, impact produce.
3. the crystallizer non sine vibration generating arrangement that servo electric jar drives.Such as Application No.
The Chinese patent of CN201420322397.1, discloses a kind of slab using electric cylinder as waveform generator non-
Sinusoidal driving device.In this mechanism, the servomotor rotating in electric cylinder makes ball-screw with a set pattern
Rule is flexible, and then drives vibration table to realize non-sinusoidal oscillation, and this device also can realize amplitude, frequency and waveform
On-line tuning, and relatively low compared with fluid pressure type of cost and maintenance cost.But the frequent positive and negative rotation of servomotor
Control accuracy can be affected, its core driving member ball-screw not only under the reciprocating motion of the little amplitude of high frequency
Easily abrasion, and carry poor with impact resistance.
Summary of the invention
It is an object of the invention to provide a kind of drive mechanism simple, take up room less, transmission accuracy is high
Continuous cast mold non-sinusoidal oscillation device and method for oscillating thereof.
The vibrating device of the present invention mainly includes adjustable frequency motor, speed variable device, eccentric shaft and connecting rod.Wherein,
In the inside of speed variable device housing, it is provided with by active straight spur gear and subtracting that driven non-disc gear train becomes
Speed change integration gear teeth wheel mechanism, actively straight spur gear axis is vertical with driven non-disc Gear axis
Intersecting, the number of teeth of driven non-disc gear is 3～8 times of the number of teeth of actively straight spur gear.Variable-frequency electric
The output shaft of machine is connected with active straight spur gear by shaft coupling, and actively straight spur gear is non-with driven
Disc gear is meshed, and driven non-disc gear is connected with one end of eccentric shaft by shaft coupling, eccentric shaft and
One end of connecting rod is hinged, and the other end of connecting rod is hinged with vibration frame.
At initial position, when motor rotates forward, driven non-disc gear is the longest the longest with eccentric shaft same to footpath to footpath
To parallel；During motor reversal, driven non-disc gear is the longest the longest with eccentric shaft anti-phase parallel to footpath to footpath.
Present invention also offers a kind of method for oscillating using above-mentioned crystallizer non sine vibration generating arrangement, its
In, the gear ratio subtracting speed change integration gear pair subtracted in change speed gear box is:
In formula, i1The gear ratio of speed change integration gear, i is subtracted for crystallizer when traveling at the uniform speed2For crystallizer speed change
The gear ratio of speed change integration gear is subtracted during operation,For the corner of non-disc gear, f is the frequency that shakes of crystallizer,
H is the amplitude of non-sinusoidal oscillation, v0Maximal rate when moving upward for crystallizer, wherein v0=2 π fhc, c
Maximal rate and the ratio of sinusoidal vibration maximal rate, ω under same-amplitude and frequency for non-sinusoidal oscillation1For
The angular velocity that frequency conversion motor rotates, β is the angle that at the end of crystallizer travels at the uniform speed, non-disc gear turns over, a0、
a1、a2、a3For the coefficient of transmission ratio function during crystallizer variable-speed operation.
The rate equation of described one vibration period of crystallizer is:
Wherein, v1Speed when traveling at the uniform speed for crystallizer, v2For speed during crystallizer variable-speed operation, f is
The frequency that shakes of crystallizer, h is the amplitude of non-sinusoidal oscillation, and c is maximal rate and the same-amplitude of non-sinusoidal oscillation
With the ratio of sinusoidal vibration maximal rate, ω under frequency1The angular velocity rotated for frequency conversion motor, β is that crystallizer is even
The angle that during speed end of run, non-disc gear turns over,For the corner of non-disc gear, i2For crystallizer speed change
The gear ratio of speed change integration gear is subtracted during operation.
Within each vibration period, vibration processes is made up of two benches:
At eccentric shaftCorner time, vibration velocity function is constant, is one section of horizontal line, crystallization
Device does and at the uniform velocity moves upward；
At eccentric shaftCorner time, mold oscillation speed state as described in formula (2) function change,
Crystallizer does and non-at the uniform velocity vibrates.
The present invention is compared with existing machinery formula driving means, and device driving-chain is shorter, and structure is compacter；With
Fluid pressure type driving means is compared, and this installation cost is low, and without stopping the phenomenons such as leakage of oil steathily, reliability is higher；With electricity
Dynamic formula driving means is compared, and bearing capacity is big, controls simple, and waveform is accurate.Use above-mentioned method for oscillating,
Displacement and velocity wave form smooth and continuous, acceleration does not suddenly change, and will not produce rigidity and soft impulse, waveform
Dynamics is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of Novel continuous casting crystallizer vibration generating arrangement in the present invention；
Fig. 2 is for subtracting speed change integration gear mechanism transmission schematic diagram；
Fig. 3 be the present invention is given certain parameter after non-disc gear pitch curve figure；
Fig. 4 be the present invention subtracts one vibration period of speed change integration gear mechanism when above-mentioned parameter in subtract change
Speed ratio curve；
Fig. 5 is to subtract when above-mentioned parameter in the present invention in one multiple vibration period of speed change integration gear mechanism
Subtract gear ratio full curve；
Fig. 6 be in the present invention when above-mentioned parameter the rate curve in one vibration period of crystallizer.
Fig. 7 be in the present invention when above-mentioned parameter the rate curve in crystallizer multiple vibration period.
Drawing reference numeral 1-adjustable frequency motor；2-speed variable device；3-eccentric shaft；4-connecting rod；5-actively straight tooth column
Gear；The driven non-disc gear of 6-.
Detailed description of the invention
The present invention is further detailed explanation with embodiment below in conjunction with the accompanying drawings:
The invention provides continuous cast mold non-sinusoidal oscillation device, as shown in Figures 1 and 2, subtract change
The inside of speed device 2 housing, is provided with by subtracting that active straight spur gear 5 and driven non-disc gear 6 form
Speed change integration gear mechanism, actively straight spur gear axis and driven non-disc Gear axis intersect vertically,
The number of teeth of driven non-disc gear is 3～8 times of the number of teeth of actively straight spur gear.Adjustable frequency motor 1
Output shaft is connected with active straight spur gear by shaft coupling, actively straight spur gear and driven non-disc
Gear is meshed, and driven non-disc gear is connected with one end of eccentric shaft 3 by shaft coupling, eccentric shaft and company
One end of bar 4 is hinged, and the other end of connecting rod is hinged with vibration frame.
The method for oscillating of crystallizer non sine vibration generating arrangement, frequency conversion motor rotates with certain angular velocity,
The gear ratio that subtracts subtracting speed change integration gear that gear subtracts in change speed gear box is:
Wherein, β is the non-disc gear corner at two motion stage junction points, is rule of thumb given and suitably takes
Value, h is the amplitude of non-sinusoidal oscillation,For non-disc gear corner, ω1The angle speed rotated for frequency conversion motor
Degree.F is the frequency that shakes of crystallizer, v0=2 π fhc, constant v0For non-sinusoidal oscillation of mould in the speed of first stage
Degree, c is maximal rate v of non-sinusoidal oscillation0With the ratio of sinusoidal vibration maximal rate under same-amplitude and frequency
Value, a0、a1、a2、a3The coefficient of gear ratio function is subtracted, by the smooth and continuous subtracting gear ratio curve for second stage
Property is tried to achieve.
Then the rate equation of the mold oscillation in one vibration period of crystallizer is:
Wherein, v1Speed when traveling at the uniform speed for crystallizer, v2For speed during crystallizer variable-speed operation, f is
The frequency that shakes of crystallizer, h is the amplitude of non-sinusoidal oscillation, and c is maximal rate and the same-amplitude of non-sinusoidal oscillation
With the ratio of sinusoidal vibration maximal rate, ω under frequency1The angular velocity rotated for frequency conversion motor, β is that crystallizer is even
The angle that during speed end of run, non-disc gear turns over,For the corner of non-disc gear, i2For crystallizer speed change
The gear ratio of speed change integration gear is subtracted during operation.
Using above-mentioned velocity wave form, the acceleration of crystallizer, speed, displacement all do not have rigidity to suddenly change, transmission
Steadily, good mechanical properties, crystallizer shelling and the carrying out of throwing can be ensured well.
Motor used by the present invention is low-speed variable frequency motor, maximal rate v of non-sinusoidal oscillation0With same-amplitude and
Under frequency, the ratio c of sinusoidal vibration maximal rate takes 0.4～0.7, the non-disc tooth at two motion stage junction points
Round angle beta takes 0.3～1rad.In this example, the parameter of Novel continuous casting crystallizer non-sinusoidal oscillation device such as figure
Shown in table 1.
Table 1 mould vibration device parameter
Can calculate in the present embodiment according to table 1 and correlation formula and subtract in change speed gear box on non-disc gear pitch curve
Data, as shown in table 2,For non-disc gear corner, r be under this corner to footpath.Obtain non-with this
Disc gear pitch curve is as shown in Figure 3.
Table 2 non-disc gear pitch curve data
Can calculate in the present embodiment to subtract according to table 1 and formula 3 and change speed gear box subtracts speed change integration gear mechanism
The data subtracted on gear ratio curve in one cycle, as shown in table 3, can obtain subtracting speed change integration tooth with this
One cycle of wheel mechanism subtract gear ratio change curve as shown in Figure 4, and then can draw in multiple cycles
Curve is as shown in Figure 5.
Table 3 subtracts speed change integration gear mechanism and subtracts the data on gear ratio curve
Crystallizer speed within a vibration period in the present embodiment can be calculated bent according to table 1 and formula 4
Data on line, as shown in table 4, with this available crystallizer rate curve within a vibration period such as
Shown in accompanying drawing 6, so can draw multiple cycles curve as shown in Figure 7.
Data on table 4 crystallizer rate curve within a vibration period
In sum, the present invention is by the simplest for the drive system of the non sine vibration generating arrangement of continuous cast mold
Change, and structure be compacter, use apparatus of the present invention and method for oscillating, also there is transmission waveform accurate,
Reliability is high, the advantages such as stationarity is good, strong shock resistance.
Claims (3)
1. a continuous cast mold non-sinusoidal oscillation device, including adjustable frequency motor, speed variable device, eccentric shaft, connecting rod,
It is characterized in that: in the inside of speed variable device housing, be provided with actively straight spur gear and driven non-disc tooth
Wheel, actively straight spur gear axis and driven non-disc Gear axis intersect vertically, driven non-disc gear
The number of teeth be 3～8 times of the number of teeth of actively straight spur gear, the output shaft of adjustable frequency motor passes through shaft coupling
Being connected with active straight spur gear, actively straight spur gear is meshed with driven non-disc gear, driven
Non-disc gear is connected with one end of eccentric shaft by shaft coupling, and eccentric shaft is hinged with one end of connecting rod, connecting rod
The other end hinged with vibration frame.
Continuous cast mold non-sinusoidal oscillation device the most according to claim 1, it is characterised in that: when motor rotates forward,
Driven non-disc gear is the longest the longest to footpath cocurrent and parallel with eccentric to footpath；During motor reversal, driven not rounded
Face gear is the longest the longest with eccentric anti-phase parallel to footpath to footpath.
3. the method for oscillating of Novel continuous casting crystallizer non-sinusoidal oscillation device, it is characterised in that: subtract and change speed gear box subtracts change
The gear ratio of speed integration gear pair is:
In formula, i1The gear ratio of speed change integration gear, i is subtracted for crystallizer when traveling at the uniform speed2For crystallizer speed change
The gear ratio of speed change integration gear is subtracted during operation,For the corner of non-disc gear, f is the frequency that shakes of crystallizer,
H is the amplitude of non-sinusoidal oscillation, v0Maximal rate when moving upward for crystallizer, wherein v0=2 π fhc, c
Maximal rate and the ratio of sinusoidal vibration maximal rate, ω under same-amplitude and frequency for non-sinusoidal oscillation1For
The angular velocity that frequency conversion motor rotates, β is the angle that at the end of crystallizer travels at the uniform speed, non-disc gear turns over, a0、
a1、a2、a3For the coefficient of transmission ratio function during crystallizer variable-speed operation；
The rate equation of described one vibration period of crystallizer is:
Wherein, v1Speed when traveling at the uniform speed for crystallizer, v2For speed during crystallizer variable-speed operation, f is
The frequency that shakes of crystallizer, h is the amplitude of non-sinusoidal oscillation, and c is maximal rate and the same-amplitude of non-sinusoidal oscillation
With the ratio of sinusoidal vibration maximal rate, ω under frequency1The angular velocity rotated for frequency conversion motor, β is that crystallizer is even
The angle that during speed end of run, non-disc gear turns over,For the corner of non-disc gear, i2For crystallizer speed change
The gear ratio of speed change integration gear is subtracted during operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305781.4A CN105855488A (en) | 2016-05-10 | 2016-05-10 | Non-sinusoidal oscillation device of continuous casting crystallizer and oscillation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610305781.4A CN105855488A (en) | 2016-05-10 | 2016-05-10 | Non-sinusoidal oscillation device of continuous casting crystallizer and oscillation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281775A (en) * | 2017-08-16 | 2017-10-24 | 广东海翔教育科技有限公司 | A kind of energy-conserving and environment-protective crystallizing tank |
| CN108746518A (en) * | 2018-05-31 | 2018-11-06 | 燕山大学 | A kind of wobble crank formula continuous cast mold non-sinusoidal vibration method |
| CN109396367A (en) * | 2018-11-21 | 2019-03-01 | 武汉钢铁有限公司 | It is a kind of for simulating the electromechanical assembly of steel-making continuous casting unit mold oscillation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480273A (en) * | 2003-07-31 | 2004-03-10 | 任廷志 | Variable speed gear with nonsinusoidal vibration in continuous casting crystallizer |
| RU2437740C1 (en) * | 2010-07-22 | 2011-12-27 | Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") | Continuous casting machine crystalliser swinging mechanism |
| CN202539499U (en) * | 2012-04-01 | 2012-11-21 | 辽宁东升冶金工程有限公司 | Driving mechanism of continuous casting machine crystallizer oscillator |
| CN104314783A (en) * | 2014-08-22 | 2015-01-28 | 梁刚 | Two-stage shaft variable-swing type method and swing vibration thruster for composing constant direction inertial resultant force |
| CN104500654A (en) * | 2014-11-26 | 2015-04-08 | 燕山大学 | Deceleration and speed change integrated face gear pair and processing method thereof |
| CN104550793A (en) * | 2014-12-26 | 2015-04-29 | 燕山大学 | Non-sine driving device for electric plate blank crystallizer |
-
2016
- 2016-05-10 CN CN201610305781.4A patent/CN105855488A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480273A (en) * | 2003-07-31 | 2004-03-10 | 任廷志 | Variable speed gear with nonsinusoidal vibration in continuous casting crystallizer |
| RU2437740C1 (en) * | 2010-07-22 | 2011-12-27 | Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") | Continuous casting machine crystalliser swinging mechanism |
| CN202539499U (en) * | 2012-04-01 | 2012-11-21 | 辽宁东升冶金工程有限公司 | Driving mechanism of continuous casting machine crystallizer oscillator |
| CN104314783A (en) * | 2014-08-22 | 2015-01-28 | 梁刚 | Two-stage shaft variable-swing type method and swing vibration thruster for composing constant direction inertial resultant force |
| CN104500654A (en) * | 2014-11-26 | 2015-04-08 | 燕山大学 | Deceleration and speed change integrated face gear pair and processing method thereof |
| CN104550793A (en) * | 2014-12-26 | 2015-04-29 | 燕山大学 | Non-sine driving device for electric plate blank crystallizer |
Non-Patent Citations (7)
| Title |
|---|
| 任雅丽: "某正交直齿面齿轮传动系接触分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 》 * |
| 刘大伟，任廷志: "非圆齿轮驱动结晶器非正弦振动的研究", 《中国机械工程》 * |
| 刘大伟等: "减变速一体化齿轮啮合原理的研究", 《机械工程学报》 * |
| 刘大伟等: "空间非圆齿轮双侧同步驱动板坯结晶器", 《中国机械工程》 * |
| 姬存强等: "正交面齿轮的设计与插齿加工试验", 《机械传动》 * |
| 林超等: "正交面传动比面齿轮的设计及三维造型", 《湖南大学学报(自然科学版) 》 * |
| 王延忠等: "正交面齿轮传动系统啮合动力学仿真", 《机械传动》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107281775A (en) * | 2017-08-16 | 2017-10-24 | 广东海翔教育科技有限公司 | A kind of energy-conserving and environment-protective crystallizing tank |
| CN108746518A (en) * | 2018-05-31 | 2018-11-06 | 燕山大学 | A kind of wobble crank formula continuous cast mold non-sinusoidal vibration method |
| CN109396367A (en) * | 2018-11-21 | 2019-03-01 | 武汉钢铁有限公司 | It is a kind of for simulating the electromechanical assembly of steel-making continuous casting unit mold oscillation |
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