Modification of Hydraulic Hammers Used in Repair of Metallurgical Units

Increasing the efficiency of machines and equipment used not only in metallurgy, but also in other industries requires using modern scientific and technological ideas and developments to create and improve machines. Repair operations in metallurgy include break-up of refractory lining as one of the...

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Bibliographic Details
Published in:Metallurgist (New York) 2023-03, Vol.66 (11-12), p.1644-1652
Main Authors: Zhukov, I. A., Martyushev, N. V., Zyukin, D. A., Azimov, A. M., Karlina, A. I.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Construction equipment industry
Demolition
Efficiency
Energy efficiency
Excavating machinery
Hammers
Hydraulics
Maintenance and repair
Materials Science
Metallic Materials
Metallizing
Metallurgy
Pneumatic devices
Refractories industry
Repair
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Summary:Increasing the efficiency of machines and equipment used not only in metallurgy, but also in other industries requires using modern scientific and technological ideas and developments to create and improve machines. Repair operations in metallurgy include break-up of refractory lining as one of the most labor-intensive operations. To mechanize this operation, hydraulic excavators equipped with a hammer are successfully used. Hydraulic hammers are more effective than pneumatic devices in breaking up very hard structures, including concrete foundations, monolithic slag, metallized conglomerates. One of the options for improving the energy efficiency of the demolition of hard structures in metallurgy is the rational use of the impact energy of hydraulic hammers. This problem can be solved by using the effect of the geometrical parameters of the striking parts of a machine on the impact efficiency of the tool. The essence of the approach is to generate a shock pulse shaped so as to follow the demolition stages. This requires a variable destroying load, which cannot be ensured by conventional hydraulic-hammer strikers. To this end, we propose new design solutions for striking bodies that have the form of a body of revolution with an internal cavity with lateral surface generated by revolving a straight or hyperbolic line. Such a shape contributes to the formation of a force pulse consistent with the destruction mechanism.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-023-01480-w