Close Blade Cutter

REDUCTION OF SPILLAGE

Significantly less spillage is achieved during the dredging process in both over-cut and under-cut due to the unique cutter head design with the principles:

The Cutter blades are based on Archimedes screw pump and aerofoil design which creates axial pumping and prevents the cut material from falling.
Material flow toward the suction pipe
Due to Archimedes design no centrifugal forces in the cutter head
The cutter head and suction pipe are aligned
The aerofoil shape of the blades leads the material to the suction pipe

MORE PRODUCTION

More production is achieved due to the following design:

Scooping effect due to the closed blade system. Any material cut will be trapped inside the blades and lead toward the suction pipe.
The airfoil shape of the cutter blades accelerates the material toward the hub of the cutter instead of outside.
The mixture flow generated by the dredge pump is lead through the blades creating a high suction velocity.

LOW TURBIDITY

Higher flow through the blades
Scooping effect
Particles are confined inside the cutter head

ACCURATE CUT

Less spillage left
Under cut and over cut have a similar effect
No need for a clean cut

HIGH TORQUE

Electric torque/ring motors are used
High number of poles
Permanent magnets rotor
Different speed and torque is possible
Low maintenance required

HIGH EFFICIENCY

The cutter head is using direct electric ring motors mounted on the cutter special hollow shaft. The design eliminates the use of long shafts, intermediate bearing blocks, gearboxes, and couplings. Due to the direct drive, the efficiency is higher than the long shaft system and higher than the hydraulic drive.

EASY INSTALLATION AND MAINTENANCE

Fewer parts to assemble
Composite bearings
No friction in the motor
Cutter hub threaded assembly
No oils and seals

HIGH MOMENT OF INERTIA

A unique feature of the electric drive cutter head is the high moment of inertia. Utilizing the center axis of rotation as a suction system, most of the weights are placed far from the axis of rotation. With this, the arrangement is much simpler and eliminates the use of expensive long shaft arrangements.

IMPROVES DREDGE PUMP PERFORMANCE

Since the Drill Cutter is utilizing the center axis of rotation as a suction system, it eliminates the use of suction mouth which results in a much more fluent suction piping arrangement.