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single-bucket walking dragline
We supply spare parts for this excavator model from stock in Krasnoyarsk and place orders with machine-building plants. Requests are received by fax: +7 (391) 2901555, 2901500, and 2901501.
Full-revolving electric digging walking machine with dragline working equipment. It is designed for excavation of ground of category I to IV including when stripping overburden with direct dumping the waste either into the mined-out space or to the pit side. Blast-loosening is demanded when mining the ground of category III and IV.
Walking draglines ESh-20/90 has been manufactured since 1981 in substitution for ESh-15/90A. Like ESh-15/90A the walking dragline ESh20/90 has a triangular cable boom, a superstructure made of tubular elements, four-gearbox swing drive, similar schemes of hoist and drag winches. In comparison with ESh-15/90A the excavator ESh-20/90 has a new package of electrical equipment with increased capacity and lift hydraulic cylinders with increased diameter; the assembly of mechanisms on the revolving frame is changed, a number of other developments is introduced.
The dragline ESh-20/90 properties are:
- a triangular three-dimensional cable boom with three tubular chords;
- hydraulic walking mechanism with two lift and two drag hydraulic cylinders;
- dipper hanger on two strings of hoist and drag ropes;
- running-in of drag ropes with the system of oscillating boom point sheaves and fixed sheaves on the superstructure;
- the base and revolving frame consist of segments connected by high-strength bolts;
direct current electric drive (generator-motor system) of main mechanisms with transistor excitation of the generators and motors;
- the use of the excavators at temperature up to -40°C.
The walking dragline ESh-20/90 and its modifications ESh-15/90 and ESh-15/100 are used in open-pit mining. They are designed for stripping overburden rocks with direct dumping the waste either into the mined-out space or to the pit side. Partial or whole blast-loosening is demanded when mining rocky material.
The excavator ESh-20/90 is equipped with:
a winch with 5 t capacity (for opening of the top part of house gates, hoist of drag ropes troughs and running-in of work ropes and others);
electric overhead travelling crane with 20 t capacity (for load handling during the assembly and repair of the equipment set on the revolving frame);
electric hoists with 3 t and 5 t capacity (for the service of pumping units, compressor stations and others);
jib crane with 8 t capacity (for the set and removal of boom point sheaves, drag hoist ropes blocks).
Basic technical parameters
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Bucket capacity, m3 | 20,0 |
| Boom length, m | 90,0 |
| Radius of operation, m | 83,0 |
| Digging depth, m | 42,5 |
| Dumping height, m | 38,5 |
| Boom angle, degree | 32 |
| Maximum safe load, t | 63 |
| Calculated cycle work at swing angle of 120° and digging depth of 25 m (ground of category I), sec | 60 |
| Calculated capacity, m3/h | 965 |
| Winch drum, mesh diameter, m | 1,8 |
| Winch ropes (twin), one rope diameter, mm | 64,0 |
| Brake drum, mesh diameter, m | 1,8 |
| Brake ropes (twin), one rope diameter, mm | 64 |
| Base |
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| Outer diameter, m | 14,5 |
| Bearing area, m2 | 165 |
| Bearing pressure, kg/cm2 | 1,05 |
| Swing circle diameter, m | 10,8 |
| Swing gear diameter, m | 8,49 |
| Swing frame |
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| Length, m | 25,4 |
| Width, m | 11,3 |
| Height, m | 1,5 |
| Walking mechanism |
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| Type | гидр. |
| Shoes length, m | 13 |
| Shoes width, m | 2,5 |
| Shoes bearing area, m2 | 65 |
| Bearing pressure when walking, kg/cm2 | 2,4 |
| Travel speed, km/h | 100 |
| Electrical equipment |
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| Hoist motor, power, kW | 2/2240 |
| Brake motor, power, kW | 2/2240 |
| Swing motor, power, kW | 4/1000 |
| Walking mechanism motors, power, kW | 2/1600 |
| d.c. synchronous motor power, kW | 2500 |
| Operation voltage, kV | 6,6 |
| Working weight, t | 1740 |
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