IMPLEMENTATIONS COMPLETED
The main objective of the project, carried out under the turnkey project system, was the design, supply, installation and commissioning of two hoisting machines type 4L-3600/DC-10m/s and type B-1200/AC-2m/s, together with intrinsically safe signalling and shaft communication system of the “Foch II” mine hoisting shaft.
The type 4L-3600/DC-12m/s hoisting machine is a 4-cable drive drum hoisting machine installed in the shaft headframe. The machine, as part of a mining shaft hoist, is provided for:
The machine is controlled automatically from the control panels at the signalling stations (transport of personnel, materials and inspection) and manually from the machine operator panel.
The main components of the hoisting machine are:
Photo 1 – 4L-3600/DC-10m/s hoisting machine
Type 4L-3600/DC-10m/s primary hoisting machine is installed on a specially designed support frame that allows the machine to be installed in the shaft headframe, and the primary shaft unit with spherical roller bearings is embedded in bearing housings. A novel hydraulic seating of the hub on the tapered journal of the primary shaft was used to house the rotor of the drive motor.
The braking process is carried out by a set of six pairs of BSFG 408-type brake cylinders with hydraulic opening with MICKE 1203 brake linings, grouped on four brake columns – two columns with two pairs of cylinders and two columns with one pair of brake cylinders. The brake cylinders are supplied from the electrohydraulic control and power unit type H-C MWM-6.
Photo 2 – H-C MWM-6 brake control and power unit
The hoisting machine has been adapted for the installation of a device for turning the grooves of the drive drum liner. The device is used to adjust the geometry of cable grooves and collection of excess grease from hoisting cables.
Photo 3 – Main DC motor
Photo 4 – Cooling system for the main motor
The drive motor is powered by two non-reversible thyristor converters type DCS800-S01-5200-04 connected in series. The excitation circuit of the motor is supplied by a reverse excitation converter type DCS800-S02-0200-05.
Photo 5 – Cabinets for the converters of the primary circuit
The drive drum of the hoisting machine is directly driven by a 2400 kW foreign-built DC motor, which is powered by two ABB DCS800 series non-reversible thyristor converters connected in series (simultaneous and sequential control). The motor excitation circuit is powered by a DCS800 series reversible converter (full reserve).
The machine is adapted to be powered from the 6 kV grid through two 6/0.275 kV converter transformers, with connection groups that allow operation with 12-pulse drive interaction with the grid. In the event of a failure in the power circuit of one of the thyristor converters of the primary circuit, there is the possibility of emergency operation using the second converter included in the described power circuit. In this state, the speed reached by the machine is reduced by half, but there is no limitation on the lifting capacity.
Photo 6 – Hoisting machine operator’s station
The hoisting machine uses the GRZ-08 digital travel controller, which has been used in multiple mining shaft hoists such as Koepe pulley double-conveyance hoists and winding drum double-conveyance hoists. It simultaneously acts as a complete speed control system.
The entire control, regulation and protection systems are based on programmable controllers and other components produced by reputable companies. All relevant functions displaying the operating states of the hoisting machine are included in the on-screen visualisation system.
The hoisting machine works with the newly installed shaft signalling and communications equipment, communicating with it in two paths, by electrical connections and through communication links.
Technical specifications of the 4L-3600/DC-10m/s hoisting machine:
| number of hoisting cables | 4 |
| winding diameter of the hoisting cables on the winder | 3600 mm |
| maximum speed | 10 m/s |
| nominal diameter of the hoisting cable | 41 – 44 mm |
| static overload | 120 kN |
| power supply parameters: | |
| hoisting machine | 6 kV, 500 VAC |
| auxiliary circuits | 500 VAC, 230 VAC, 24 VDC |
| primary parameters of the drive motor: | |
| type | PW-124 |
| power | Pn = 2400 kW |
| RPM | nn = 64 rpm |
The B-1200/AC-2m/s type hoisting machine is a component of a mine emergency and inspection shaft hoist for the Foch II shaft. It is a single-drum hoisting machine used as an emergency and inspection hoist and is designed to provide:
The control of the hoisting machine is manual from the hoisting machine control panel or automatic in remote start mode with speed control.
The B-1200/AC-2m/s hoisting machine is equipped with a 75 kW AC motor that, together with the drive system, allows the conveyance to move at a speed of 2 m/s.
Photo 7 – B-1200/AC-2m/s hoisting machine
The main components of the hoisting machine are:
Photo 8 – H-C MWM-6D brake control and power unit
The hoisting machine uses the GRZ-08-A digital travel controller, which implements the functions of speed setting and control. The entire control, regulation and protection systems are based on programmable controllers and other electrical components produced by reputable companies.
Photo 9 – Hoisting machine operator’s station
The hoisting machine B-1200/AC-2m/s works with the shaft signalling and communications system, communicating with it in two paths, by electrical connections and through data exchange in sub-programs of PLC logic controllers.
Technical specifications of the B-1200/AC-2m/s hoisting machine:
| diameter of the winding drum | 1200 mm |
| number of layers of hoisting cable | 8 |
| diameter of the hoisting cable | 22 mm |
| hoisting depth | 900 m |
| maximum travel speed | 2,0 m/s |
| maximum load weight | 0,4 Mg |
| power supply of the hoisting machine | 500 VAC |
| drive motor parameters: | |
| power | Pn = 75 kW |
| RPM | nn = 1484 rpm |
The intrinsically safe shaft signalling and communication system, based on PLC programmable logic controllers, is designed to operate the primary shaft hoist. The shaft signalling system is equipped with the ECHO-S wireless shaft communication device and the TS type intrinsically safe local shaft telephone communication system.
Communication links between local stations are implemented using optical fibre cables as 2 transmission paths, each made as a closed loop.
Photo 10 – Signalling stations
The intrinsically safe shaft signalling and communication system, based on PLC programmable logic controllers, is designed to operate the primary shaft hoist and is equipped with the ECHO-S wireless shaft communication device and the TS type intrinsically safe local shaft telephone communication system.
Communication links between local stations are implemented using optical fibre cables as 2 transmission paths, each made as a closed loop.
The reactive power compensation system was designed as a linear compensation system of the Xinus®H type, consisting of the reactive part divided into two stages with a total power of 1 MVar and an active part Xinus®D3 with a power of 0.6 MVar. Both parts operate under the supervision of the Xinus®Master power controller.
Photo 11 – Cabinets of the system for reactive power compensation and filtering of higher harmonics
