Since producing China’s first mine winder in 1958, Luoyang-based CITIC Heavy Industries Co Ltd (CITIC HIC) has provided over 8,000 items to greater than 20 nations, which it argues makes it the world’s largest provider of hoisting tools.
CITIC HIC is without doubt one of the world’s three main suppliers of full units of mechanical, electrical and hydraulic tools of mine hoisting tools, and might produce numerous varieties of mine winders corresponding to drum winders, friction winders, Blair multi rope drum winders (BMR) and hydraulic motor-driven winders. It could possibly additionally produce tools corresponding to dam crossing winders and hydraulic ship lifts.
The everlasting magnet motor direct pushed winder, multi-channel braking system, and high-voltage 4 quadrant variable frequency transmission system developed by CITIC HIC lately have all reached the worldwide superior stage.
To scale back the power consumption of mine hoisting, CITIC HIC has developed a everlasting magnet motor direct pushed winder, which it says has the benefits of excessive effectivity, good low-speed efficiency, robust overload capability, easy construction, and handy upkeep. “In contrast with winders outfitted with asynchronous drive programs, the everlasting magnet motor direct pushed winder achieves an power saving charge of over 10%, and in contrast with winders outfitted with synchronous drive programs, it achieves an power saving charge of over 5%. It could possibly function stably, safely, and reliably at a low frequency of 0.02 Hz, which it says will considerably contribute to the fast improvement of inexperienced and energy-efficient mining.”
CITIC HIC everlasting magnet motor direct pushed winder
The multi-channel braking system of CITIC HIC primarily consists of three elements: high-performance disc brake, multi-channel fixed deceleration hydraulic station, and twin PLC redundant management cupboard. The appliance of fixed deceleration braking precept and multi-channel management expertise in multi-channel braking system it says has improved the protection efficiency of the hoisting system in regular operation and emergency accidents.
Key technical options embrace: the braking aspect responds rapidly, the idle time lower than 0.2 seconds, and repair lifetime of ＞2×106 cycles. The ‘pressure-speed’ twin closed-loop management of multi-channel braking system integrates a FPGA adaptive algorithm, guaranteeing fixed deceleration in braking course of below all working situations. In emergency braking course of, the velocity fluctuation may be managed inside ± 3%, successfully eliminating shock vibrations and twine slippage, and enhance the service lifetime of the wire rope. The system features a multi-channel security braking circuit and parallel redundant oil return pipes, guaranteeing dependable operation. Moreover, the system options self-diagnostic capabilities and gives distant fault detection and restore, which may scale back downtime.
The CHIC1000 sequence excessive efficiency four-quadrant high-voltage frequency converter from CITIC HIC is designed particularly for mine winders, primarily based on knowledgeable motor management mannequin, and adopts high-performance algorithms together with voltage feedforward, load observer, and low-frequency ripple compensation on the premise of vector management, delivering quick torque response, secure low-frequency operation, and excessive energy issue. It’s appropriate for all drive varieties of mine hoists together with AC asynchronous, low-speed synchronous, and everlasting magnet synchronous motors.
Key technical options embrace a high-reliability design with double system margin design; high-performance vector decoupling closed-loop management of synchronous motor which eliminates dangers of creeping and reversal throughout startup; and variable excitation closed-loop management sustaining the ability issue at 1.0, dynamically adjusting excitation present to keep away from rotor overheating. CITIC HIC hoists additionally supply ultra-low-frequency operation the place the load observer precisely predicts load torque, successfully suppressing low-frequency vibration for secure operation at 0.05 Hz.
The CITIC HIC answer has zero-speed hovering expertise, enabling electrical parking at zero velocity earlier than making use of mechanical brakes, guaranteeing secure and impact-free stopping. Utilizing the impartial level drifting expertise, the ability unit with bypass fault may be restored to operation.
Not too long ago, 4 units of CITIC HIC ground-mounted friction hoists (with most drum diameter of 6 m and 4 lifting metal ropes) had been designed and manufactured for Luyuan Mining Mboukoumassi Potash Mine in Republic of the Congo. Two units of 5 m dual-drum shaft sinking hoists had been additionally designed and manufactured for Serbia Zijin Copper in Serbia. Lastly, 4 units of tower-mounted friction hoists (with most drum diameter of 6 m, with six lifting metal ropes) had been designed and manufactured for Shenhua Xinjie Power Co Ltd.
