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14.0 Hydraulic feeding system (Hydraulic moving floor) (if mounted).
The hydraulic moving floor is the most preferred fuel feeding system for larger installations where it is
woodchips which is desired as fuel.
The installation can be made in many ways e.g. shown on the picture underneath where the fuel stock is at
same level as the boiler room.
The hydraulic moving floor consists of
the following components.
1. Moving floor in burning chamber
2. Hydraulic cylinder
3. Hydraulic pump
4. Fuel sensor
5. Transversal transport screw
This is how it is working:
1.
The transport screw is starting because the boiler needs fuel
2.
The fuel sensor above the transversal transport screw is reporting empty (can be
observed on the monitor screen)
3.
The hydraulic pump is starting ( can be observed on the monitor screen)
4.
The hydraulic cylinder is pulling / pushing the moving floor
5.
When the cylinder reach the limit position the pressure in the system is rising and the
embedded compression air valve turns the oil flow around and the moving floor is
running the other way around.
6.
When one of the sensors on the transversal screw observes fuel then the hydraulic will
stop.
Maintenance:
The sensors above the transversal screw should be cleaned once and a while. If they are starting to report
full (bright) although the screw is running empty then clean off the sensor.
Checking oil on the hydraulic pump station.
Adjustment:
The sensors: Can be adjusted with the little screw on the side. It should be adjusted to
activate when there is 5 centimetre fuel above the screw.
Switching pressure on the hydraulic station: Should only be done by engineers. However,
the switching pressure has to be adjusted between 120 and 150 Bar. It is indicated on the
manometer on the hydraulic pump station exactly when the cylinders change direction.