Theoretical and experimental analysis of mine elevator dynamic characteristics

Abstract

Original scientific paper The paper presents the issues with the dynamic analysis of mine elevators used with underground exploitation of raw materials. Dynamic occurrences are particularly emphasized with those elevators due to the fact that they are facilities with extreme heights (up to 2000 m) and lifting speeds (up to 20 m/s) using the steel ropes. It shows the forming path of a competent dynamic model for the analysis of such elevators. Basic parameters (stiffness and damping) are of variable magnitude during the lifting, so their values are defined through a combination of theoretical analysis and performed experiments at RTB mine elevators at the town of Bor (Serbia). Keywords: damping; dynamic model; experimental analysis; mine elevators; stiffness Teorijsko-eksperimentalna analiza dinamičkih karakteristika rudničkih liftovaIzvorni znanstveni članak U radu je prezentirana problematika dinamičke analize rudničkih liftova koji se koriste pri podzemnoj eksploataciji sirovina. Kod ovih postrojenja posebno su izražene dinamičke pojave, jer se radi o postrojenjima s ekstremnim visinama (do 2000 m) i brzinama dizanja (do 20 m/s) pomoću čeličnih užadi. Prikazan je postupak formiranja mjerodavnog dinamičkog modela za analizu ovakvih postrojenja. Osnovni parametri (krutost i prigušenje) su, u toku dizanja, promjenjive veličine i njihove vrijednosti su određene kombiniranjem teorijske analize i realiziranih eksperimenata na rudničkom liftu u RTB u Boru (Srbija).

Determination of heavy machines performances by using a measuring system with telemetric synchronization and transmission of signals

“…For mining stackers, as larger earthmoving machines, the frequency band of the fi rst 100 eigenfrequencies is ω=0.07-12.75 Hz, while the critical eigenfrequencies of resonant vibration in the vertical plane for the main structural parts are in the range of ω=2. [7][8][9][10][11][05]. A typical scheme, which has been in use for several years, is given in Fig.…”

Analysis of Transverse Vibration Acceleration of a High-Speed Elevator with Random Parameters under Random Excitation

“…The car frame is in contact with the guide rails by four guide wheel-guide shoe systems. The guide wheel-guide shoe system and damping block are simplified into a spring damping system [8]. The stiffness and damping of four guide wheel-guide shoe systems are k 1 and c 1 , and the stiffness and damping of four damping blocks are k 2 and c 2 .…”

A Robust Nonlinear Controller With Low-Gain-State-Observer for Wire Rope Tension Active Control of Hoisting Systems

“…Due to the increasing exhaustion of shallow (500~800m) and deep (800~1000m) coal resources, the exploration of ultra-deep (>1000m) mines has been the development tendency [3]. Therefore, the large capacity and high-speed mine hoisting system applied in ultra-deep mines has a wide demand [4,5]. However, the traditional single rope winding hoisting systems [6] and multi ropes friction hoisting systems [7] that shown in Figure 1 are not suitable for ultra-deep coal mines due to the following reasons.…”