Reasons for the Overheating of Diesel Generator
by Starlight Generator dieselgeneratortechThere are
many reasons for the overheating of diesel generators.
1. The diesel
generator does not operate in accordance with the prescribed technical
conditions, such as too high stator voltage, increased iron loss, too large
load current, increased copper loss in stator winding, too low frequency, which
will slow down the speed of cooling fan and affect the heat dissipation of
generator, and the power factor is too low. It will increase the rotor
excitation current and then cause the rotor to heat. Users should check that
the monitoring instrument's instructions are correct. If the monitor is
abnormal, must carry on the necessary adjustment and the processing, causes the
generator to operate according to the stipulated technical condition.
2. The
three-phase load current of the diesel generator is unbalanced, and the
over-loaded one-phase winding will overheat. If the difference of the
three-phase current exceeds the rated current by 10 percent, it is a serious
phase current imbalance, and the three-phase current imbalance will produce a
negative sequence magnetic field, thus increasing the loss. Causes the magnetic
pole winding and hoop and other parts to heat. The three-phase load should be
adjusted to keep the current balance as far as possible.
3. The air
duct is blocked by dust and the air is not well ventilated, which makes it
difficult for the diesel generator to dissipate heat.
4. If the
inlet air temperature is too high or the inlet water temperature is too high,
the cooler will be blocked. The inlet or inlet temperature should be lowered to
remove the clogging in the cooler. Before the fault is eliminated, the
generator load should be limited to reduce the generator temperature.
5. Bearings
with too much or too little grease should be added as prescribed, usually 1 / 2
/ 1 / 3 of the bearing chamber (upper limit of low speed and lower limit of
high speed), and should not exceed 70% of the bearing room.
6. Bearing wear. If the wear is not serious, the bearing will overheat locally, and if the wear is serious, the stator and rotor may be friction, which will cause the stator and rotor to overheat. Bearings should be checked for noise, if any stator and rotor friction, should immediately stop for repair or replacement of bearings.
Jiangsu Starlight Electricity Equipments
Co.,Ltd. is a professional manufacturer of diesel generator set with more than
43 years experience producing diesel genset, products cover Cummins, Perkins,
Volvo, Deutz, Yuchai, Shangchai, Weichai, Ricardo, MTU, Baudouin, etc. If you
are interested, welcome to contact us by email: sales@dieselgeneratortech.com.
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Created on Jan 4th 2020 00:01. Viewed 312 times.