DK series counter-rotating the main ventilatorDK series
counter-rotating main ventilator is specially designed
according to the needs of various non-coal mine
ventilation, such as metallurgy, nonferrous metals, gold,
chemicals, building materials, and nuclear industry, etc., which
can be used as a main fan and auxiliary fan. It can be
installed on the surface or underground, suitable for the combined
operation of multiple fans, which is an ideal machine
station ventilator for various machine stations in the
ventilation system of the multi-fan series multi-stage
machine station. It is also suitable for ventilation in large
workshops, tunnels, civil air defense projects, etc.The features of
the DK series counter-rotating the main ventilator(1) The
aerodynamic efficiency is high and the energy-saving effect is
extremely significant by using the twisted airfoil blades.(2)
With diverse performances and complete specifications, it can
be well-matched with various ventilation networks of
various kinds of air resistance and air volume type
to maintain long-term and efficient operation.(3)
It is equipped with a steady flow ring device and
the characteristic curve does not has a hump. There is
no risk of a surge, so it can be operated safely and stably
under any resistance state, and it is suitable for the combined
operation of multiple fans.(4) It adopts the structure of
a direct connection between the motor and the impeller, so it
has good overall stability, as well as can be
installed conveniently and maintained easily with
low device resistance. Its transmission efficiency of it
is higher than that of the belt and long shaft,
without transmission failure and broken
shaft risk. The mild foundation sinking and slipping will
not affect normal operation.(5) It has a compact structure and
good moisture resistance. The main body of the fan is adopted
the steel plate and section steel block welding
structure. The blade is made of steel plate material, which is
hollow. The blade and overall strength are high and the
ability to resist downhole blasting waves is strong. It can be
installed on the surface or underground, which is
especially suitable as a machine station ventilator for the
multi-stage station ventilation system.(6) It can reverse the
reverse wind and the wind reversal rate is greater than 60%. It is
not necessary to build a reverse wind channel.(7) The blade
installation angle can be adjustable and the working condition
of the ventilator can be adjusted at any time according to the
changes of the mine.(8) The amount of civil work is small, so
it can save a lot of investment.(9) The noise is low.When used
as the main fan and the station fan, the DK series counter-rotating
main ventilator should be equipped with a special diffuser.
The main fan on the surface shall be equipped with a
diffuser to convert one part of the dynamic pressure into static
pressure and reduce the dynamic pressure, and loss of the outlet,
so as to achieve the purpose of energy saving. The
ventilator installed in the well shall be equipped with a
diffuser, which not only can reduce the local resistance
coefficient, but also can reduce the dynamic pressure value of
the diffuser outlet, thereby greatly reducing the local resistance
of the fan device and saving ventilation power consumption.All of
the DK series counter-rotating main ventilators are equipped
with special supporting diffusers. The flange of the diffuser
is fixed to the flange of the fan outlet with the
bolt.The motor applied for the DK series counter-rotating
main ventilator is usually a Y series three-phase asynchronous
motor with a rated voltage of 380V and a protection class of IP54
(ie closed type), which can be fully adapted to the
direct drive and installed in the mine to transport the air
containing gun smoke, dust and the air with high humidity.The
supporting special protection starter cabinet of the DK
series counter-rotating the main ventilator According to the
needs of users, the ventilator of each specification can be
supplied with a special protection starter cabinet when it is
delivered from the factory. The electronic control device can
reliably protect the motor from the faults, such as overload,
voltage loss, short circuits, etc. A device that
can quickly reverse the motor is set for it.
When the ventilator is required to reverse the
inverted wind, press the stop button first, and then press the
reverse button after the ventilator stops.The DK series
counter-rotating main ventilator is a steel plate welded
structure, which cannot be subjected to large impact during
transportation to prevent the deformation of the case and the
blade to be stuck. Ventilators with a machine number
greater than 14 are generally produced in a structure that can be
disassembled up and down. When the ventilator is installed in
the well if the cross-sectional area of the well is small, the
upper and lower parts of the case, wheel hub, motor, etc. Can
be disassembled and transported s
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