The failure of Volvo generator is usually
caused by many factors. Different failures show different phenomena. To
eliminate the failure, the cause of the failure must first be found out.
In the long-term production practice, people have found out that "one
look, two A set of inspection methods of "listening, three touching, and
four smelling" uses instrument monitoring and the feeling of human
organs to observe and judge the operation of Volvo generators.
The general principles for judging the failure of Volvo generators
are: combining the structure, the connection principle, clarifying the
phenomenon, combining the reality, from simple to complex, from the
outside to the inside, section by system, and find the cause.
1. Abnormal operation
After a Volvo generator has been running for a long time, it fails, and the following phenomena are usually encountered.
(1)
Abnormal sound during operation. When the diesel engine is operating,
abnormal knocking sound, shooting sound, bragging sound, exhaust sound,
periodic friction sound, etc. are emitted.
(2) Abnormal
operation. The diesel engine is not easy to start, violent vibration
occurs during operation, the load cannot be dragged, and the speed is
unstable.
(3) Abnormal appearance. The diesel engine exhaust pipe
emits white smoke, black smoke, and blue smoke, and oil leakage, water
leakage, and air leakage occur in various systems.(4) Abnormal
temperature. The oil temperature or cooling water temperature is too
high, the bearing is overheated, etc.
(5) Abnormal smell. When the diesel engine is running, it emits odor, burnt smell and smoke smell.
When
the Volvo generator is running, after discovering the above-mentioned
abnormal phenomena, a careful investigation must be carried out, and the
location and cause of the fault must be analyzed and judged according
to the fault phenomenon. Sometimes a fault may have several abnormal
phenomena. For example, after the high-pressure oil pump is worn out, it
can show not only difficulty in starting, but also insufficient output
power, and unstable low-speed operation. Sometimes an abnormal
phenomenon may be caused by several failures. Therefore, when Volvo
generators are running abnormally, we must carefully investigate the
causes of the abnormal phenomena. This requires us to be good at
analysis, reasoning and judgment, to grasp the essence through the
phenomenon, to find out the cause and location of the failure, and to
eliminate the failure.
2. Inspection method
(1) Identify the fault location based on the abnormal sound.
Use
a macaroni screwdriver or a half-meter-long thin iron bar sharpened at
one end to make a “needle judgment”. The location, the size and nature
of the sound. The sound produced by different parts is often
different. For example, if the main bearing clearance is too large, the
impact sound is dull, the valve and piston hitting sound is crisp, if
the flywheel keyway is loose, it will make a "hes! Hs!" impact
sound, etc. Therefore, the fault is judged according to different
sounds. Of the site.
(2) Use the local stop method to judge.
After
failure analysis, if it is suspected that the failure is caused by a
certain cylinder, the cylinder can be stopped to observe whether the
failure phenomenon has disappeared, so as to determine the cause
and location of the failure. For example, if the diesel engine emits
black smoke, it is analyzed that the nozzle hole of a certain cylinder
is blocked, and the fuel supply to the cylinder can be stopped.
If the black smoke disappears, the judgment is correct.
(3) Judging by the comparison method.
According
to the failure analysis, it is suspected that the failure may be caused
by a certain component. You can replace the component (or component)
with a new one, and then start and run the diesel engine to
compare whether there is any change in the working conditions before and
after the diesel engine, so as to find out the cause of the failure.
(4) Use heuristics to judge.
Based
on the analysis of the cause of the failure, it is difficult to judge
for a while. You can change the technical status in a local area to
observe whether the Volvo generator's performance is affected, so as to
determine the cause of the failure. For example, the Volvo generator
cannot deliver the specified power, and it is suspected that the
compression stroke pressure of a certain cylinder is insufficient, which
is caused by the large gap between the cylinder and the piston.
Reinstall the cylinder head. If the pressure increases and the output
power increases during the start-up test, the analysis is correct.
After
long-term use of Volvo generators, there are many failures. Due to the
different models of diesel engines and operating environments, the
causes of failures are also different. Therefore, when dealing with
problems, specific problems should be analyzed in detail according to
different situations. Correctly analyzing and judging the cause of the
Volvo generator failure is a meticulous work. You should not dismantle
it without understanding the cause of the failure. It would not possible
to eliminate the failure, but may cause new failures without meeting
the technical requirements when reassembling the disassembled parts and
components.
Please feel free to contact us if you
encounter the above problem, Guangxi Dingbo Power Equipment
Manufacturing Co., Ltd. is an professional manufacturer of various diesel generator set and
we has a modern production base, equipped with a team of technical
experts who are ready to serve. If you want to know more, please contact
us by
dingbo@dieselgeneratortech.com
