Servo motor driven continuous casting crystallizer non sine vibration generating arrangement
Servo motor driven continuous casting crystallizer non sine vibration generating arrangement
 CN 1,318,163 C
 Filed: 03/25/2005
 Issued: 05/30/2007
 Est. Priority Date: 03/25/2005
 Status: Active Grant
First Claim
1. the continuous casting crystallizer non sine vibration generating arrangement of a driven by servomotor is grouped into by mechanical part and electric control part, it is characterized in that:
 Mechanical part;
servomotor (1) is connected by the power shaft of shaft coupling (2) with decelerator (3), the output shaft of decelerator (3) is connected with eccentric shaft (5) by shaft coupling (4), eccentric shaft (5) directly or indirectly drives shake table by connecting rod (6) and crystallizer (7) mounted thereto is realized nonsinusoidal oscillation, wherein servomotor (1) be periodically the variable angular velocity folk prescription to continuous rotation;
Automatically controlled part;
computer is pressed the variable angular velocity rotating speed Mathematical Modeling of servomotor ${n}_{1}\left(t\right)=\frac{60}{2\mathrm{\π\mathrm{iomega;lsqb;1A\mathrm{cos}(\mathrm{omega;t)rsqb;}}}}$Or ${n}_{2}\left(t\right)=\frac{60}{2\mathrm{\πi\frac{(1{E}^{2})\mathrm{omega;1+{E}^{2}+2E\mathrm{cos}(\mathrm{omega;t),}}}{}}}$By certain time interval Δ
t, automatically calculate the speed setting value of wishing in each sampling instant, provide in proportion and the speed setting value corresponding voltage value by D/A then, the speed governing drive unit compares with rotary speed actual value after this magnitude of voltage is converted into speed setting value, remove to control servomotor (1) after computing and the power amplification, can obtain speed curvesthe notch cuttype curve of actual servomotor (1);
Behind decelerator (3), can obtain the angular speed curve of actual eccentric shaft (5);
Through obtaining after the mold oscillation mechanism driving and the actual nonsinusoidal oscillation waveform of wishing the crystallizer of waveform basically identical.
Litigations
Chinese PRB Reexamination
Abstract
The present invention discloses a continuous casting crystallizer nonsinusoidal vibration generating device driven by a servo motor. The present invention comprises an electric control section which comprises a computer, a D/A (D/A converter) board, a speed regulating and driving device; a servo motor (1) is controlled to rotate continuously in one single direction at the rotation speed to which timevarying angular speed corresponds so as to drive a crystallizer through mechanical parts, such as a speed reducer (3), an eccentric shaft (5), a connecting rod (6), etc. so that the crystallizer generates periodic nonsinusoidal vibration; besides, the mathematical model of varying angular speed rotation speed of the computer servo motor (1) is n1 (t) =60/2 pi i omega [1Acos (omega t)] or n2 (t) =60/2 pi i (1E<2>) omega/1 + E<2> +2Ecos (omeg t). The present invention has the advantages of simplified transmission system, compact structure, high loading capability, strong shock resistance, etc.; the servo motor (1) continuously rotates at one single direction at periodically varying angular speed, which avoids frequent start and stop of positive/reverse rotation; the nonsinusoidal vibration frequency and the waveform deviation ratio of the crystallizer can be regulated in an online mode.

4 Citations
No References
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Current Assignee

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Current Assignee

6 Claims

1. the continuous casting crystallizer non sine vibration generating arrangement of a driven by servomotor is grouped into by mechanical part and electric control part, it is characterized in that:

Mechanical part;
servomotor (1) is connected by the power shaft of shaft coupling (2) with decelerator (3), the output shaft of decelerator (3) is connected with eccentric shaft (5) by shaft coupling (4), eccentric shaft (5) directly or indirectly drives shake table by connecting rod (6) and crystallizer (7) mounted thereto is realized nonsinusoidal oscillation, wherein servomotor (1) be periodically the variable angular velocity folk prescription to continuous rotation;Automatically controlled part;
computer is pressed the variable angular velocity rotating speed Mathematical Modeling of servomotor${n}_{1}\left(t\right)=\frac{60}{2\mathrm{\π\mathrm{iomega;lsqb;1A\mathrm{cos}(\mathrm{omega;t)rsqb;}}}}$ Or${n}_{2}\left(t\right)=\frac{60}{2\mathrm{\πi\frac{(1{E}^{2})\mathrm{omega;1+{E}^{2}+2E\mathrm{cos}(\mathrm{omega;t),}}}{}}}$ By certain time interval Δ
t, automatically calculate the speed setting value of wishing in each sampling instant, provide in proportion and the speed setting value corresponding voltage value by D/A then, the speed governing drive unit compares with rotary speed actual value after this magnitude of voltage is converted into speed setting value, remove to control servomotor (1) after computing and the power amplification, can obtain speed curvesthe notch cuttype curve of actual servomotor (1);
Behind decelerator (3), can obtain the angular speed curve of actual eccentric shaft (5);
Through obtaining after the mold oscillation mechanism driving and the actual nonsinusoidal oscillation waveform of wishing the crystallizer of waveform basically identical.


2. the continuous casting crystallizer non sine vibration generating arrangement of driven by servomotor according to claim 1, it is characterized in that:
 the speed governing drive unit adopts the speed probe feedback, also can adopt its inner voltage status to feed back, and removes to control the rotating speed of servomotor (1).

3. the continuous casting crystallizer non sine vibration generating arrangement of driven by servomotor according to claim 1 and 2, it is characterized in that:
 the span of the frequency f of mould nonsinusoidal vibration is 0～
300 time/minute, the span of the waveform deviation proportion α
of mould nonsinusoidal vibration is0.4～
0.4, the span of mould nonsinusoidal vibration amplitude h is 2～
8mm, and wherein the waveform deviation proportion α
of frequency f and nonsinusoidal oscillation can onlinely regulate.
 the span of the frequency f of mould nonsinusoidal vibration is 0～

4. the continuous casting crystallizer non sine vibration generating arrangement of driven by servomotor according to claim 1 and 2, it is characterized in that:
 when eccentric shaft (5) drove shake table and crystallizer (7) mounted thereto indirectly and realizes the nonsinusoidal oscillation waveform by connecting rod (6) and shaker arm (9), the rotation direction of servomotor direction of rotation of servomotor when directly driving got final product in the time of only need making indirect driving.

5. the continuous casting crystallizer non sine vibration generating arrangement of driven by servomotor according to claim 1 and 2 is characterized in that servomotor (1) can exchange, and also can be direct current;
 Servomotor (1) can be split with its speed governing drive unit, also can be one.

6. the continuous casting crystallizer non sine vibration generating arrangement of driven by servomotor according to claim 1, it is characterized in that:
 when the most of weight balancing of balancing spring (8) with shake table and crystallizer being installed below the shake table (7) of crystallizer falling, then can use servomotor (1) directly to drive eccentric shaft (5).
Specification(s)