ANALYSIS OF DRIVE MECHANISM OF SIDE-TO-SIDE MOVING FLEXIBLE BLADE

The article analyses flexible blade equipment used in mineral mining and processing both in Russia and abroad. The research allows a conclusion on exploitability of cable saws with a drive to support back-and-forward movement of blade. The analysis data on change in driving rope tension of blade drives for alternating side-to-side movement of flexible cutting element (SSMBD) are presented. The kinematics of the driving ropes is described, and the force interaction between rock mass and tooth is shown. The values of the force buildup in driving rope in the early period of operations are found for SSMBD and for the drive of a saw with synchronous movement of driving ropes, and the ratio of these values is determined. It is found that in the initial period of operation of SSMBD, the depth of cut is maximum not at the end of the blade stroke but in its middle, which results in the jump in tension and, thus, in the break of pull sides of the driving rope. The maximum mismatch movement of SSMBD driving ropes, which is a defect symptom of the drive, makes approximately 1.4 % of the power stroke of the blade. The resultant analytical expression of the maximum driving rope tensions takes into account the blade kinematics defect. The article ends with recommendations on elimination of the SSMBD kinematics defect by introduction an adjuster in the kinematic chain of the drive.


For citation: Bardovsky A. D., Gerasimova A. A. Analysis of drive mechanism of side-to-side moving flexible blade. MIAB. Mining Inf. Anal. Bull. 2019;(7):132-139. [In Russ]. DOI: 10.25018/0236-14932019-07-0-132-139.

Keywords

Blade drive, driving ropes, asynchronous movement of driving ropes, driving rope tension, cutting element, depth of cut, rock mass, velocity.

Issue number: 7
Year: 2019
ISBN: 0236-1493
UDK: 621.9.025.7
DOI: 10.25018/0236-1493-2019-07-0-132-139
Authors: Bardovsky A. D., Gerasimova A. A.

About authors: A. D. Bardovsky, Dr. Sci. (Eng.), Professor, e-mail: bardowski@yandex.ru, A. A. Gerasimova, Cand. Sci. (Eng.), Assistant Professor, e-mail: allochka@rambler.ru, National University of Science and Technology «MISiS», 119049, Moscow, Russia. Corresponding author: A.D. Bardovsky, e-mail: bardowski@yandex.ru.

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