DESIGN OF AN EFFICIENT CHAMBERED DISC-PAD BRAKE

Volchenko O. Kharkiv National Automobile and Highway University https://orcid.org/0000-0003-0388-8351
Voznyi A. Ivano-Frankivsk National Technical University of Oil and Gas https://orcid.org/0009-0004-4938-1294
Vudvud O. Odessa National Polytechnic University https://orcid.org/0000-0002-4807-3634
Semeniy O. Kharkiv National Automobile and Highway University https://orcid.org/0009-0004-2464-6508
Andreychikov Ye. Ivano-Frankivsk National Technical University of Oil and Gas https://orcid.org/0000-0002-4579-3636

Keywords: drilling winch, disc-pad brake, friction unit, brake disc, brake disc chamber, nanofluid, stress-strain state

Abstract

DOI: https://doi.org/10.26565/2079-1747-2026-37-12

The materials of the article consider the optimization design of friction pairs of a chamber-type disc-shoe brake taking into account the restrictions on the design and operational parameters. The design and operation of a chamber disc-shoe brake of a drilling winch are presented, with a brake disk consisting of two half-disks of variable thickness, the larger of which corresponds to the maximum radius of the friction zone, and the smaller one to its minimum radius. As a heat carrier in the disk chamber in the cooling system, low-melting Li in the form of a powder mixed with water was used. Using the force method, the inertia forces, radial and tangential forces acting on the chamber disk and nanofluid in the volume of the chamber were determined. The stress-strain state of the disk was simulated to study mechanical and thermal stresses using the Ansys Workbench program. The values of the maximum equivalent stresses and stress gradients along the thickness of the chamber disk were determined and analyzed. The efficiency of nanofluid cooling was assessed using the thermal balance of the chamber disk. The thermal balance was assessed during forced air and forced nanofluid cooling of a metal friction element. Experimental and design developments, theoretical studies, and a full-scale computational experiment on a new type of chamber disc-pad brake with nanofluid cooling allowed us to establish the regularities of changes in operational parameters in the form of graphical dependencies. The main operational and heat exchange parameters of the serial and developed disc-pad brake of a drilling winch were compared. The wear and friction properties of friction pairs were improved by operating the brake in a temperature range lower than that permissible for the friction lining material, and, as a result, the braking qualities for the lifting shaft of the drilling rig.

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