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Solutions to failures of air-cooled screw chillers
Jul 23, 2021
The air-cooled screw chiller is a screw chiller that uses fans to dissipate heat.
The installation environment it needs must be open and easy to circulate, so
that this operation will not affect the cooling effect of the air-cooled screw
chiller .
Therefore,
we should understand some common faults of air-cooled screw chillers and some
troubleshooting methods:
1. The
fan noise of the air-cooled screw chiller is too loud
Bearing
component wear/excessive clearance: If it is worn, it should be replaced in
time, and if the clearance is too large, it can be directly adjusted to a
suitable position;
The speed
is too high: it can be improved by reducing the speed, if it is not solved,
replace the fan;
2. The
temperature rise of the motor of the air-cooled screw chiller fan is too high
The flow
exceeds the rated value: the valve needs to be closed at this time;
Motor or
power supply problems: find out the reasons for the motor and power supply;
3. The
bearing temperature of the air-cooled screw chiller fan increases
The fan
shaft and the motor shaft are different: they need to be adjusted to be
concentric;
Bearing
damage: need to replace a new bearing, or directly contact the chiller
manufacturer to replace it.
Insufficient
lubricating oil (grease) or poor quality: If the lubricating oil is not enough,
the company should fill it up to the required part; if there is a quality
problem, it is necessary to clean the bearing or replace the more qualified
lubricating oil (grease);
4. The
air output of the air-cooled screw chiller fan is too small:
Blockage
of air inlet, outlet and pipe: check and remove the blockage;
Insufficient
valve opening, speed, and belt slack: you can check the bearing by adjusting
the valve opening to a proper opening, tightening and replacing the belt, and
checking the voltage.
Check
that the connection between the impeller and the shaft is loose, which can be
eliminated by direct prohibition; if the gap between the impeller and the air
inlet is too large, it should be adjusted to a suitable gap.
The fan
of the air-cooled screw chiller is equivalent to the cooling tower cooling
system of the water-cooled chiller. If the heat dissipation effect is not good,
the cooling capacity of the air-cooled screw chiller is absolutely
insufficient, which directly affects the company’s refrigeration Water demand.
Therefore, we need to maintain and maintain our chillers in a timely manner.