Contract: “Modernisation of the mining shaft hoisting machine in the western compartment of shaft III of KWK ROW PGG Sp. z o.o. “Marcel” Mining Plant” implemented as a turnkey project.
IMPLEMENTATIONS COMPLETED
Scope of the project
- replacement of the skip hoisting machine K-5500/DC-16m/s,
- supply of a mobile hoisting machine B-1200M/AC-2m/s together with an intrinsically safe shaft signalling and communication system,
- replacement of sheave pulleys on the headframe,
- supply of a control and signalling system for the skip hoist,
- comprehensive renovation of the hoisting machines building and the converters hall,
- modernisation of the machine power supply system – 6/0.5/0.4kV transformer-switching station,
- modernisation of the loading equipment,
- supply and installation of the machinery and equipment,
- cooperation with mining supervisory authorities,
- commissioning and servicing of supplied equipment.
K-5500/DC-16m/s hoisting machine
The K-5500/DC-16m/s hoisting machine is a single-cable hoisting machine with a Koepe wheel with a diameter of 5500 mm, installed in the building located by the shaft entry. The machine, as part of a mining shaft hoist, is provided for:
- output haulage,
- personnel and individual transport,
- materials transport,
- inspection of the shaft and hoisting elements.
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.
Modernised components of the K-5500/DC-16m/s hoisting machine:
- drive motor,
- primary shaft with bearings and winder,
- brake with hydraulic opening cylinders,
- converter transformers of the primary circuit, excitation circuits and auxiliaries,
- primary circuit converters,
- excitation circuit converters,
- control, monitoring and safety systems,
- system for the visualisation and signalling of the operating states of individual components of the machine,
- additional equipment.
Photo 1 – K-5500/DC-16m/s hoisting machine
Photo 2 – LS-60D Lubricating unit
Photo 3 – Column with two pairs of brake cylinders
Photo 4 – H-C MWM-4/VER.III electrohydraulic control and power unit
The hoisting machine is adapted for power supply from the 6 kV grid through two 6/0.475 kV converter transformers. This power supply system allows operation with 12-pulse interaction of the drive with the 6 kV power 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.
The excitation circuit is powered from the 500 V mains via a converter transformer.
The drive motor is powered by two non-reversible thyristor converters type DCS800 with a rated current of 2750A connected in series. The excitation circuit of the motor is supplied by a reverse excitation converter type DCS800 with a rated current of 350 A.
Photo 5 – View of the open cabinets for the converters of the primary circuit and excitation of the drive motor
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.
Photo 6 – Hoisting machine operator’s station
Technical specifications of the K-5500/DC-16m/s hoisting machine:
| number of hoisting cables | 1 |
| nominal winding diameter of the hoisting cables on the winder | 5500 mm |
| speed | 16 m/s |
| maximum static overload | 135 kN |
| maximum acceleration/delay | 1,2 m/s2 |
| primary parameters of the drive motor: | |
| type | PW-115 |
| power | Pn = 2600 kW |
| voltage | Un = 934 VDC |
| motor current | In = 3066 A |
| RPM | nn = 56 rpm |
The B-1200M/AC-2m/s mobile hoisting machine with an intrinsically safe shaft signalling and communication system
The B-1200M/AC-2m/s type hoisting machine is a component of an auxiliary single-end mining emergency and inspection shaft hoist.
The control of the hoisting machine is manual from the hoisting machine control panel or automatic in remote start mode with speed control.
Photo 7 – B-1200M/AC-2m/s mobile hoisting machine
Photo 8 – Mechanical part of the mobile hoisting machine
The main components of the B-1200M/AC-2m/s hoisting machine are:
- main shaft unit,
- cylindrical toothed gear with a gear ratio of 45,5,
- 110 kW AC motor,
- disc brake,
- additional oil flow forcing system,
- ACS880 type frequency converter for power supply to the hoisting machine drive motor,
- 500 VAC switchgear for powering the frequency converter and auxiliary drives of the hoisting machine,
- control, regulation and safety systems for the hoisting machine,
- system for the information signalling of the operating states of individual components of the hoisting machine.
Photo 9 – Mobile hoisting machine drive unit
Photo 10 – Mobile hoisting machine operator’s station
The intrinsically safe shaft signalling and communication system works with the hoisting machine.
The intrinsically safe shaft signalling and communication system is designed based on a PLC programmable logic controller integrated with the hoisting machine control system, equipped with an intrinsically safe ECHO-S-W wireless shaft communication unit.
Photo 11 – Hoisting machine of B–1200M/AC–2m/s type ready for operation in shaft III
Photo 12 – Sheave pulleys of the mining emergency shaft hoist
