Generator set internal combustion engine overhaul
Internal combustion engine overhaul is a restoration of the repair.
Mainly to restore the power performance of the internal combustion
engine, economic performance and fastening performance of the parts
to ensure the integrity of the internal combustion engine, along
the long-term use period.
The basic content of the diesel generator set is: repair or replace
the crankshaft, connecting rod, cylinder liner, valve seat, valve
guide; repair eccentric bearings; replace the plunger vice, oil
valve vice and needle valve vice three precision coupling; repair
welding oil pipe and joints; repair and replace the water pump,
governor, clear the water jacket scale; check, repair, adjust the
power supply system in the line, instrumentation, charging
generator and starter motor, etc.; installation, monitoring,
testing, adjusting the systems, and load, test, adjust the systems,
and load test.
Internal combustion engine overhaul, generally should be based on
the number of hours of work and technical condition to decide.
Different models of internal combustion engine overhaul hours of
work are different, the time is not static, such as improper use
and maintenance or poor working conditions of internal combustion
engine (dusty, often work under overload, etc.), may not reach the
number of hours of work before, can not continue to use. Therefore,
in determining the overhaul of the internal combustion engine, in
addition to the number of hours of work, but also according to the
following overhaul determination conditions:
(1) the internal combustion engine work powerless (after adding
load to the speed of a large drop, the sound of sudden changes),
black smoke from the exhaust.
(2) the internal combustion engine at room temperature start
difficulty, go hot crankshaft bearings, connecting rod bearings and
piston pins have knocking sound.
(3) internal combustion engine at normal temperature, the cylinder
pressure does not reach 70% of the standard pressure.
(4) The fuel and oil consumption rate of the internal combustion
engine increases significantly.
(5) The cylinder out-of-roundness and taper, the clearance between
the piston and the cylinder, the crankshaft journal and the
connecting rod journal out-of-roundness exceed the specified limit.
Internal combustion engine overhaul, its main parts should be
repaired, the whole machine will be broken down into assemblies,
combinations, parts and parts, and inspection and classification,
more repair technical conditions, a thorough inspection, repair and
assembly test.
What circumstances require diesel generator set overhaul?
1 the cylinder liner bore wear serious
Diesel generator set cylinder liner bore wear serious its roundness
or cylindrical reach or exceed the use limit. Conventional
roundness to 0.05-0.063 mm, cylindricity to 0.175-0.250 mm,
multi-cylinder diesel engine to wear heavier cylinders as the
basis.
2 the crankshaft journal, connecting rod journal serious wear
Crankshaft journal, connecting rod journal serious wear, its
roundness or cylindricity to reach or exceed the specified limit.
3 the cylinder pressure dropped significantly
Diesel generator set cylinder pressure dropped significantly, less
than 75% of the rated pressure, the cylinder has an abnormal sound,
and the sound does not disappear after the machine heats up.
Diesel generator sets require overhaul of 7 kinds of situations -
have to drive
4 the amount of oil consumption seriously exceeds the standard
Fuel, lubricant oil consumption seriously exceeds the standard, oil
pressure drop, exhaust smoke.
5 start abnormal difficulties
Difficult to start, even stop in operation, still can't start
smoothly when the water temperature is 60ºC.
6 the power dropped significantly
Power dropped significantly, when the throttle is large, the power
issued by the diesel generator set is less than 75% of the rated
power.
7 the crankcase temperature increased significantly
Diesel generator set crankcase temperature is significantly higher,
diesel engine vents and oil filling port foggy smoke, the exhaust
gas with oil.
Jinan Guohua always insists on the high standard and strict
requirement of product quality, in accordance with the enterprise
principle of survival by price and development by quality, respects
the contract, keeps the promise, speaks the good faith, combines
the advanced technology and testing means, seeks the essence and
the quality, wins many repeat customers. Guohua generator sets are
widely used in communication, factories and mines, ports, highways,
ships, railroads, airports, power plants, hotels, troops and other
places, is the ideal emergency power supply equipment, won the
trust and support of all walks of life.
