Method for controlling operation speed of cantilever crane rotating mechanism of cantilever type bucket wheel reclaimer

A technology of slewing speed and slewing mechanism, which is applied in the direction of electric speed/acceleration control, etc., can solve the problems of affecting the efficiency of reclaiming and slow slewing speed, and achieve the effect of improving the efficiency of reclaiming

Inactive Publication Date: 2013-01-30
天津港中煤华能煤码头有限公司
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Problems solved by technology

[0004] However, when the stockpile is narrow, because the materials on both sides are relatively thin, the speed regulation according to 1/COSφ can only meet the efficiency of retrieving materials

Method used

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  • Method for controlling operation speed of cantilever crane rotating mechanism of cantilever type bucket wheel reclaimer
  • Method for controlling operation speed of cantilever crane rotating mechanism of cantilever type bucket wheel reclaimer
  • Method for controlling operation speed of cantilever crane rotating mechanism of cantilever type bucket wheel reclaimer

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] figure 1 Shown is a schematic diagram of a narrow stockpile, and whether it is a normal stockpile or a narrow stockpile can be judged based on on-site experience. Generally, a stockpile with a stockpiling capacity of less than 5,000 tons and a height greater than 17 meters is regarded as a narrow stockpile. Before the reclaiming operation, the operator determines whether it is a narrower stockpile based on experience. If it is a narrower stockpile, adjust the control mode of the PLC controller to the working mode of the narrower stockpile.

[0028] When the stockpile is narrow, on the side of the smaller angle, rely on the repose angle α of the material to calculate the range of speed regulation that needs to be different from 1 / COSφ on both sides of the material. The smaller the angle of repose, the greater the speed ΔV that...

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Abstract

The invention discloses a method for controlling operation speed of a cantilever crane rotating mechanism of a cantilever type bucket wheel reclaimer and provides the method capable of increasing material taking efficiency of the cantilever type bucket wheel reclaimer. The method for controlling the operation speed of the cantilever crane rotating mechanism of the cantilever type bucket wheel reclaimer includes: determining a narrow material pile boundary area: setting the length in the horizontal direction corresponding to the boundary area to be A, and determining the rotating angle beta corresponding to the boundary area; comparing an arbitrary included angle phi formed by a cantilever crane during rotating and a rail with the rotating angle beta, wherein if phi is larger than or equal to beta, the rotating speed Vn=V0*1/cos(phi), and if phi is smaller than beta, the rotating speed Vn'=K*V0*1/cos(phi)*1/cos(alpha); if the theoretical rotating speed Vn' of the boundary portion is smaller than the largest material taking rotating speed, and the real-time current value of a bucket wheel motor is smaller than the rated current value of the bucket wheel motor, taking the theoretical rotating speed Vn' on the boundary portion obtained through calculation as the boundary material taking rotating speed; otherwise, taking the largest material taking speed as the material taking rotating speed on the boundary portion.

Description

technical field [0001] The invention relates to the field of operation control methods of a bucket wheel reclaimer, in particular to a method for controlling the operating speed of a swing mechanism of an arm frame of a cantilever type bucket wheel reclaimer. Background technique [0002] Cantilever bucket wheel reclaimers are widely used in reclaiming operations in stockyards. During the rotary reclaiming process, the cutting area is crescent-shaped. Therefore, when the rotation angle is constant, the filling amount of the material in the bucket changes. Far away from the track, the amount of material taken is small, and the amount of material taken is zero when the cantilever is vertical to the track. For normal reclaiming operations, the rotation angle is generally controlled at about 60°. [0003] In order to eliminate the "crescent loss" during the reclaiming process, the rotary absolute value encoder of the bucket wheel reclaimer can accurately detect any angle Φ for...

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Application Information

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IPC IPC(8): G05D13/62
Inventor 王超峰张茂林李强田煜达谢河沧田保东邵晨江恒山
Owner 天津港中煤华能煤码头有限公司
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