Movable scraper optimum control for cleaning balling pan bottom

Abstract

The invention discloses an active scraper optimization control to clean balling base bottom, which comprises the following steps: obtaining angular speed omega of disc balling machine, establishing track curved mathematic model, trace curved density mathematic model and mathematic model of covering index, taking covering index delta in the artificial program to optimize, affirming optimum parameter omegai for active scraper, inputting the optimum parameter omegai in the programmable controller PLC[5], connecting programmable controller PLC[5] and converter [6], connecting converter [6] and converting motor [7], driving the active scraper [8] by converting motor [7] through driving system.

Description

technical field [0001] The invention belongs to the technical field of pelletizing discs. In particular, it relates to an optimal control of a movable scraper for cleaning the bottom of a pelletizing disk. Background technique [0002] The scrapers used in the disc pelletizer include: movable scraper, fixed scraper, crank slider type or reciprocating scraper. Among them, the fixed scraper type has been gradually eliminated because it is easy to form large pieces, has no "partition" and "volleyball" functions, and is difficult to replace and maintain; the crank slider type or reciprocating scraper is also called a swing scraper (Zhang Leshui reciprocating scraper) Improvement of [J], Cement, 2000.03 (52-53); Φ3.2m into a ball disc crank slider type scraper device [J], Cement, 2000.05 (39)), because the overall structure is more complicated, difficult to maintain and adjust , trajectory distribution is not very ideal, etc. are rarely used at home and abroad. At present, mos...

AI Technical Summary

Problems solved by technology

Although the structure is simpler than that of the oscillating scraper, and the track distribution is better than that of the oscillating scraper, because there are several cutter heads on the movable scraper disk, when the ball disk rotates once, the trajectories formed by the cutter heads of the movable scraper intersect with each other; at the same time, the cutter heads Part of the trajectory formed at the bottom of the pan cannot reach, causing a "ring platform" at the bottom of the pan, uneven distribution of material balls, incomplete cleaning of the bottom of the pan, and unreasonable partitioning of large and small raw balls due to the uneven chassis

As a result, there will be serious disk area and segregation, resulting in unbalanced operation of the ball disk and heavy load

The bottom of the disc pelletizing machine is uneven, there are many large balls that cannot be discharged in the disc, the trajectory of the raw balls in the disc is relatively chaotic, and material collapse often occurs; these directly lead to disc pelleting. The output of a single machine is low, the rate of raw balls is low, the powder content is high, workers clean up large balls frequently, and labor intensity is high

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