The State Enterprise Kharkiv Morozov Machine Building Design Bureau (SE 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 SE 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:
|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 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|
|constant (t/h)||125 (3000 t/day)|
|Dimensions of hydraulic station (length х 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||
|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):