ROTODIFF® hydraulic decanter drive

The decanter drive > ROTODIFF® hydraulic motor and hydraulic pump unit

Advantages of hydraulic decanter drive

A solid bowl decanter centrifuge is used for a wide variety of procedural tasks, from treatment and separation to screening, concentrating, washing and extraction.

The decanter drive is one of the most important prerequisites for an optimal separation process.

The decanter bowl speed substantially influences the following:

  • The separating speed
  • The sedimentation

The decanter scroll speed substantially influences the following:

  • The solids transport and, as a result, the solid throughput
  • The solids retention time 
  • The solids loading separation time

A high bowl speed and powerful hydraulic ROTODIFF drive for the scroll as well as a scroll speed that automatically adapts to the solids load in the inlet are the prerequisites for increasing the performance and availability of the decanter centrifuge substantially. The drive controls the differential speed between the decanter bowl and scroll as a function of the prevailing scroll torque. In all Viscotherm systems, the drive carries out direct and infinitely variable control automatically, which allows ongoing, optimal adaptation to the separating tasks.

Advantages of hydraulic Viscotherm ROTODIFF drive

A characteristic feature of all VISCOTHERM drive systems is the ability to adapt them optimally to an extremely wide range of operating conditions. The scroll and bowl drives of the hydrostatic ROTODIFF drive system operate independently from one another in terms of energy and control technology. During ongoing operation, the bowl and differential speed can be adjusted independently of each other.

  • Scroll and bowl drive is power is completely independent from each other
  • Direct controllability / the hydraulic oil pressure is proportional to the generated scroll torque. This enables a direct, closed control loop decanter drive for scroll and bowl.

VISCOTHERM develops and produces hydraulic ROTODIFF drive systems for a wide variety of applications. The drive systems are designed based on the required torque (ROTODIFF) and required differential speed.

Antriebssysteme – Ausführungen

Hydraulic scroll drive

The scroll drive system consists of the following parts:

  1. Pump unit
  2. Control system
  3. ROTODIFF (hydrostatic scroll drive) 
  4. Bowl drive / electric motor, frequency-controlled (scope of delivery of centrifuge manufacturer)

Hydraulic scroll and bowl drive 

The fully hydraulic system consists of the following parts:

  1. Pump unit
  2. Control system
  3. ROTODIFF (hydrostatic scroll drive)
  4. Bowl drive (hydraulic bowl drive)