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4.6
Blast wheel
The heart of the blast-cleaning machine is a blast wheel that throws the abrasive onto the surface to be
cleaned by using centrifugal force. The blast wheel is placed in a protective housing lined with replaceable
wear parts. The blast wheel is driven by an electric motor.
1
Impeller bolt
2
Cage clamps
3
Control cage
4
Impeller
5
Blades (set of 6)
6
Blastwheel
7
Taperlock adapter blastwheel
8
Blastwheel shaft taperlock bush
9
Top liner
10
Liner Right Hand side
11
Liner Left Hand side
The impeller (4) is placed in the center of the blast wheel (5+6). The impeller feeds dosed quantities of
abrasive onto the blades (5) of the turning blast wheel.
The control cage (2) is placed over the impeller. The control cage has a lateral window (indicated with 1 notch)
which regulates the throwing angle of the abrasive.
4.7
Hydraulic drive system
The drive system is an independent hydraulic system. The hydraulic pump is driven by a small electric motor.
There is an ON and an OFF switch on the control box to operate this motor. The flow of oil through the system
is governed by a manually operated flow control regulating the amount of oil which is directed to the drive
wheel motors. This governs the speed of the motors, whether it is in forward or reverse position. The hydraulic
tank contains its own relief valves which are pre-set and has filters on both suction and return line.
1
Hydraulic pump
2
Pump motor
3
Speed control valve
4
Directional control valve
5
Drive wheel
6
Drive motor
14
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