Blastrac 2-20DT, Руководство по эксплуатации

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4.9 Blast wheels
The heart of the blast cleaning machine are the blast wheels which throw the abrasive onto the surface to be
cleaned by using centrifugal force. The blast wheels are placed in a protective housing lined with replaceable
wear plates. The blast wheels are driven by electric motors.
Around the centre of the blastwheel there is the impeller, feeding dosed quantities of abrasive onto the blades
of the turning blast wheel. On top of this is the control cage which, once it is carefully set, regulates the flow of
abrasive.
4.10 The abrasive valve
Between the abrasive storage hopper and the feed spouts there are valves
incorporating permanent magnets in order to control the abrasive flow towards
the blastwheels. Any change in the opening of the magnetic valve causes the
amount of abrasive fed to the blastwheel to change. The change in the
abrasive fed can be read from the ammeters. The valves are hand-operated by
the
abrasive control lever . This lever is located on the side of the control box
and can be adjusted so that any quantity of abrasive can be fed to the
blastwheels. Optimum blast cleaning power is reached when the ammeters
indicate the operating current. It is not permitted to blast with a higher current
value. The control lever operates both magnetic valves simultaneously.
4.11 Separator
The abrasive separator is mounted to the end of the rebound plenum. It separates the abrasive from
contaminants and feeds the cleaned abrasive back to the abrasive circuit. A wire mesh is fitted to prevent any
large contaminants from getting into the blast wheels. In order to clean the wire mesh drawer, the separator
cover can be removed or the wire mesh drawer can be removed from the side. Check and empty the drawer
before and after each operation.
During operation U should check the separator tray every 3 hours for foreign matter and large contaminants.
14 Wheel hubs
10 Blast wheels
2 Blast wheel cover plate
11 Control cage shims
15 Control cages
16 Control cage clamps
1 Separator
2 Separator drawer (wire mesh)
3 Deflector
4 Separator cover