A Laboratory Machine Verifying the Operation of a Hydraulic Rope Equalizer with Tensometric Sensors
Leopold Hrabovský, Jiří Fries, Štěpán Pravda
TL;DR
This paper describes a lab machine that tests how hydraulic systems can evenly distribute tension across multiple ropes, with a 5% deviation.
Contribution
A novel laboratory setup using tensometric sensors to verify hydraulic rope equalizer performance is presented.
Findings
Hydraulic oil pressure in the circuit can be studied to evenly distribute load across ropes.
With proper hydraulic design, load distribution can achieve up to 5% deviation.
Unknown hydraulic oil volumes prevent accurate pressure calculations during valve adjustments.
Abstract
In mining machines with friction discs, but also in multi-rope traction elevators, it is necessary to distribute the applied tensile load, generated by the weight of the cage and counterweight, evenly in all cross-sections of the load-bearing ropes. Hydraulic devices used for this purpose can operate on the principle of Pascal’s law. This article presents a structural design, a 3D model and an implemented solution of a laboratory device capable of simulating a practical method of evenly distributing the total weight of the load into partial tensile forces of the same size acting on a selected number of load-bearing ropes. The laboratory equipment uses two pairs of three steel cables of finite length for the simulations. During the experimental measurements, tensile forces derived from the tractive force of the piston rods, pushed into the bodies of the hydraulic cylinders by the…
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Taxonomy
TopicsHydraulic and Pneumatic Systems · Mechanics and Biomechanics Studies · Control Systems in Engineering