Necessity of Wire Rope Replacement in Crane Lifting Equipment After Change of Crane Operational Parameters

Kuľka, Jozef; Mantič, Martin; Kopas, Melichar; Faltinová, Eva

doi:10.12913/22998624/71180

Cited by 8 publications

(10 citation statements)

References 5 publications

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“…Braking and maintaining at rest the rotational movement of the drive unit of the lifting [7], travel [3,21], rotating and tilting mechanism of a crane, the torque of a drum or friction elevator machine [6], or the torque of the drives of continuously operating conveyor equipment [9,11] involve the use of the drum, solid disc [19], vented disc or belt brakes [17].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining

Hrabovský¹,

Hrbáč²

2021

Adv. Sci. Technol. Res. J.

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The paper describes the design of laboratory equipment, which was created for verification and determination of the value of the static coefficient of friction in the contact surfaces of the brake lining and the brake drum of the drum brake with external shoes by experimental procedure. Suppliers of brake linings state the values of the friction coefficients which correspond to different operating temperatures, but do not state the values of the friction coefficient of the respective brake lining with regard to the state of contamination of the contact surfaces. In practice, the brake contact surfaces are exposed to moisture, dust, lubricants and oils; these weather and operational influences significantly affect the value of the coefficient of friction. The results of the laboratory tests performed with two types of brake linings (commonly used in practice) (fabric, hardened rubber) show that the coefficient of friction of a given brake lining is strongly influenced by the state of contamination of the contact surfaces.

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Section: Introductionmentioning

confidence: 99%

Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining

Hrabovský¹,

Hrbáč²

2021

Adv. Sci. Technol. Res. J.

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“…They can also be successfully used for diagnostic purposes. Such methods have been increasingly used in recent years [3][4][5][6][7][8]10,16,18,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…The purpose of this research [17] was to study the potential of the laser oil pockets new design so as to improve the piston rings lubrication. These pockets make it possible to achieve significant friction reduction by using appropriate geometric parameters [7,8,10,24].…”

Section: Introductionmentioning

confidence: 99%

Impact Evaluation of Piston Rings Mobility on a Gas Passage in an Internal Combustion Engine (Ice)

Заренбин¹,

Kolesnikova²,

Sakno³

et al. 2019

SJSUT.ST

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To estimate the effect of the axial movement of piston rings in the piston grooves on the blow-by in the internal combustion engine (ICE) by an experiment-calculated method. This contributes to the development of practical recommendations for the further improvement of the engine ring seal designs. Abstract theorems were used when modelling the effect of the axial movement of piston rings in the piston grooves on the blow-by in an ICE. They are based on the fundamental theory of heat engines, thermodynamics and hydraulics. The ICE running was analysed using design-theoretical research methods. The effect of the axial movement of piston rings in the piston grooves on the blow-by in the ICE was established. This creates prerequisites for a more accurate assessment of their sealing capacity and for ways to further improve them. Calculated dependences

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“…Steel ropes are complex flexible structures used in many technical applications, such as elevators [1], crane [2,3,4], marine applications [5], cable ways and hoisting mine applications [6,7]. In many high-rise residential buildings or multistorey warehouses, machinery, so called lifts, are used for the vertical transportation of people or weights between attitudinally distant places [8].…”

Section: Introductionmentioning

confidence: 99%

Experience of the Crane Steel Wire Ropes Non-Destructive Tests

Peterka¹,

Krešák²,

Vojtko³

2018

Adv. Sci. Technol. Res. J.

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The non-destructive tests (NDT) of the steel wire ropes put on the crane pulley blocks comprise more than a half of our NDT services. The intensive utilization of cranes often leads to critical situations endangering health and safety at work. The operators are forced to provide safety use of the cranes due to new cranes constructions, new construction of the block pulley and put on the new steel wire rope constructions. The NDT tests of the crane steel wire ropes are coordinate by the Standard ISO 4309. We have experienced only the crane steel wire ropes with an individual wire rope core during our NDT tests so far. The visual NDT test usually used is ineffective to the steel wire ropes with this construction. Based on our previous experience it can be confirmed that surface ruptures are produced after the disintegration of wires inside of a rope; it often leads to the rope abruption during its operation. The reduction of the pulley block dimensions often leads to the problem of the multi-axis rope bending. This kind of the rope line in the pulley block causes the increase of the fretting fatigue of the wires and the rope strands. The same type of the stress is created when the dead ends of the rope are badly constructed.

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Necessity of Wire Rope Replacement in Crane Lifting Equipment After Change of Crane Operational Parameters

Cited by 8 publications

References 5 publications

Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining

Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining

Impact Evaluation of Piston Rings Mobility on a Gas Passage in an Internal Combustion Engine (Ice)

Experience of the Crane Steel Wire Ropes Non-Destructive Tests

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