| The State-owned Enterprise Kharkiv
Morozov Machine Building Design Bureau (SOE KMDB) in co-operation with State Enterprise “Malyshev Plant” (Kharkiv,
Ukraine) have introduced inclined two-auger diffusers with hydraulic drive of the transport
system (similar to DDS of Denmark) into series production. We have also mastered manufacturing processes of spare
parts for DC-12 diffusers (Poland) and change from electrical drive to hydraulic drive.
Design documents for the whole diffuser were developed by
the SOE KMDB in co-operation with NIIGydroprivod Research Institute as
a developer of hydrostatic drive.
The hydraulic drive of the diffuser transport system enables
to process up to 3200 t of sugar-beet chips per day. It provides smooth
change of auger speed from 0.12 to 1.2 rpm, easy start after a long period
of being out of operation and when screw chamber is fully loaded. Advantages
of the hydraulic drive against the electric one are as follows:
- lower speeds of about 0.5 to 0.8 rpm are possible, which increases
sugar output by 8 to 12 %;
- contact of augers is excluded due to provision of a pair of synchronizing
gears; reliable protection of augers from damage when overload occurs;
- rpm can be maintained at any value assigned by the operator for a
long period of time;
- control system enables efficiently diagnose technical condition of
elements of the hydraulic drive and transport system.
Technical specifications
| Parameter description |
Values |
| Type of hydraulic drive |
hydrostatic drive with hydraulic motors as actuators to rotate augers
of inclined diffuser DDS or DS-12 |
| Components of hydraulic drive |
- hydraulic motor to drive augers through reducers with gear ratio
1250
- hydraulic station comprising pumps with electric motors, hydraulic
equipment, filters and oil cooler
- pipelines between hydraulic station and hydraulic motors
- power and control system
|
| Hydraulic motors (augers) speed control |
remote control through changing efficiency of main pumps from diffuser
control panel |
| Auger speed (rpm) |
- during idle run (sugar-beet chips are not loaded into diffuser)
|
0.12 to 1.2 |
- at max load (transporting of sugar-beets up to 140 t/h)
|
0. 12 to 1.0 |
Torque developed by hydraulic motors (kN.m),
(at reducer shaft) |
at least 1225 |
| Max power developed by hydraulic motors (kW) (at torque of 245 Nm
and 1250 rpm) |
at least 125.6 |
| Hydraulic tank capacity (dm3) |
750 |
| Efficiency of diffuser transport system
hydraulic drive as to quantity of processed sugar-beet chips |
| |
125 (3000 t/day) |
| |
140 |
| Dimensions of hydraulic station (length õ width), m |
3x3 |
| Duty |
continuous duty, three-shift duty within 2 to 6 months |
| Hydraulic drive and automatic equipment
control system |
| Main parameters under control |
- auger speed
- pressure in delivery lines of the hydraulic system
|
| Hydraulic drive automatic system provides the following |
automatic shutdown of electric motors pumps in case fluid level
in hydraulic tank is low or lubrication system of auger bearings mulfunctions
|
All components of the equipment undergo intensive tests
and adjustment before delivery to sugar mills.
Scope of work includes delivery of the equipment to a sugar
mill, installation, adjustment, commissioning, supervision, maintenance,
repairs under warranty, supply of spare hydraulic equipment and diffuser
as a whole.
Perfected design of the hydraulic system and deliveries
of components from various manufacturers enable us to offer upgraded models
of hydraulic drives DA-3T.10-9 and DA-3T.10-11 at the market.
The hydraulic drives presently offered have the following advantages
in comparison with those produced earlier for Kelmenetskogo, 1st Petrovskogo
and Orelskogo sugar mills (models DA-3T.10-42; DA-3T.10-5 and DA-3T.10-7
accordingly):
- DA-3T.10-9 - The hydraulic drive is equipped with
reduced from 2200 to 750 dm3 volume of hydraulic tank, reduced by 30%
dimensions of the hydraulic station and simplified main pump control
system
- DA-3T.10-11 - The hydraulic drive is equipped
with main pumps and hydraulic motors either of Russian origin or manufactured
by famous European companies that ensure reliable and durable operation
of diffuser transport system. Capacity of the hydraulic tank and dimensions
of hydraulic station are the same with those of diffuser DA-3T.10-9
|
|
Hydraulic drive for diffuser |
