excavators |
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Electric quarry shovel EKG-15 is designed for mining
and loading overburden rock and resources into
transport facilities at open minings for forming minedout
space. The models EKG-8U and EKG-12Us
with elongated front-end equipment are created on
the base of EKG-15. The excavators with elongated
front-end equipment can be used for drivage of pilot
cuts, and also for loading into transport facilities located
on overlaying levels. Excavator EKG-15 and
its modifications provide high rates, have high manoeuvrability.
These shovels are easy to operate and
maintain. The modern construction and high-strength
materials provide reliable operation of shovels in any
climatic conditions.
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constructional peculiarities |
excavators |
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The excavator is equipped with modern electronic
control system on the basis of thyristor converters. The
thyristor transformers used in the system allow to provide
independent infinitely variable control of the main
drives and formation of optimal static and dynamic
characteristics based on the motor-generator scheme.
The control system is provided with necessary locks
for ensuring reliable and safe excavator operation. The
modular construction of transformers simplifies troubleshooting
and repair. Use of the elongated equipment essentially widens
technological abilities of basic model. The planetary gears of the shovel’s swinging mechanism
in comparison with earlier used reduction gears
are more compact, can endure higher loads, are more
reliable and have a longer service life. All drives are
supplied with effective electrical disk brakes. The tooth
gears are manufactured of high-alloy steels with surface
thermo-strengthening. The dipper handle represents single-leg construction,
manufactured of hollow shells, with head casting
in a forefront for attachment of a dipper. The front-end
equipment construction with hanger dipper leveling unit
fully frees dipper handle of torsion, that ensures essen-
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tial decreasing its weight; installation of double-action
shock absorption mechanism in the dipper handle rear
end reduces dynamic loads in the crowd and dipper
handle mechanism, when the dipper meet insuperable
obstacle in the pit-face and at the dipper handle
blowing with saddle block. The dipper handle shock
absorption mechanism location reduces the length of
rear end (it is especially importantly for models with
elongated front-end equipment) and dipper handle
weight in a whole, that has a favourable effect for realization
of force on dipper tooth. Replaceable return
semi-unit is installed at the dipper handle forefront,
that ensures high hardness and long service life of its
groove at the expense of dipper handle and semi-unit
individual thermal treatment. The shovel is fitted with cable reel for power high
voltage cable with automatic reeling and unreeling
at shovel travel and operation. The capacity of cable
reel is 630 m. Arranged above the machinery house operator’s
cabin ensures clear visibility at the operation.
The cabin is large and hermetic. It is equipped with
a heating system, an air-conditioner, ventilation and
heating glassworks, a vibroinsulated seat.
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Technical characteristics |
excavators |
| Capacity of main dipper, m3 |
16.5 |
| Changeable dipper capacity, m3 |
18 |
| Maximum hoist effort on the dipper, kN (ton-force) |
1470(150) |
| Designed cycle time, sec |
28 |
| Maximum load on dipper hanger, kN (tf) |
980 (100) |
| Design cycle duration, s |
26 |
| Traveling speed on prepared track, km/h |
0.7 |
| Travel speed along prepared route, km/hour |
0.82 |
| Maximum climbing angle of route incline, deg |
12 |
| Nominal main motor power , kW |
1250 |
| Nominal transformer power, kVA |
250 |
| Supply voltage (3-phase, 50 Hz), V |
313 |
| Average specific ground pressure, kPa |
240 |
| Excavator with dipper working weight, t |
698 |
| Main dipper weight, t |
29.6 |
| The balance box weight, t |
45.0 |
| Boom length, m |
18 |
| Dipper handle movement , m |
4.9 |
| Bloom tilt angle, deg |
45 |
| Maximum digging radius, m |
22.6 |
| Maximum digging height, m |
16.6 |
| Maximum dumping radius, m |
19.30 |
| Maximum dumping height, m |
9.88 |
| Height to bloom head units, m |
18.7 |
| Digging radius at floor level, m |
15.6 |
| Height to filtered air ventilation unit, m |
9.99 |
| Revolving frame clearance, m |
3.56 |
| Rotation radius of revolving frame rear end, m |
10 |
| Distance from tail piece of boom to rotation center, m |
3.2 |
| Height to jack
boom, m |
15 |
| Operator’s eye level, m |
8.2 |
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| Welded lower frame of
low-alloyed steel |
length, m |
8 |
| width, m |
7.9 |
| Toothed rim of steel
alloy |
diameter,
mm |
4385 |
| width, m |
300 |
| Diameter of roller circle in the rail
center, m |
7.6 |
| Number of rollers, pcs |
72 |
| Diameter of roller, m |
260 |
| Welded frame of
revolving frame of
low-alloy steel |
length, m |
16.49 |
| width, m |
4.55 |
| Undercarriage |
total width, m |
9.4 |
| total length,
m |
12 |
| The number and diameter of supporting
wheels, mm |
10х1050mm
2х1150mm |
| Diameter of the tumbler sprocket,
mm |
1220 |
| Diameter of the bear-up wheel, mm |
1600 |
| The number and diameter of tracks,
mm |
100х500 |
| Boom welded of two sections |
| Diameter of main double-grooved units with
surface hardening of grooves, mm |
1600 |
| Diameter of crowd double-grooved units
with surface hardening of grooves, mm |
1400 |
| Diameter of dipper handle, mm |
800 |
| Thickness of dipper handle beam, mm |
50 |
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