Cleaning Methods of Diesel Generator Set
by Starlight Generator dieselgeneratortechI Cleaning
Fluid
1. Organic solvents
See kerosene, light diesel,
gasoline, alcohol and trichloroethylene. Organic solvent degreasing is based on
dissolving dirt. It has no damage to metal, can dissolve all kinds of grease,
does not need heating, is easy to use, and has good cleaning effect. However,
organic solvents are mostly flammable and costly, and are mainly suitable for
small-scale units and decentralized maintenance work.
2. Alkaline
solvent
It is an aqueous solution of an
alkali or a basic salt. The alkaline solution is chemically reacted with the
saponifiable oil on the surface of the part to form a water-soluble soap and
glycerin which does not easily float on the surface of the part, and then
rinsed with hot water to remove the oil easily. In the case where the
unsaponifiable oil and the saponifiable oil are not easily removed, an
emulsifier should be added to the cleaning solution to emulsifie the oil and
separate from the surface of the part. Commonly used emulsifiers are soap,
water glass (sodium silicate), gum, and the like. Different cleaning fluids
should be used for parts of different materials. Alkaline solutions have
different degrees of corrosion to metals, especially aluminum.
When cleaning with an alkaline
solution, it is generally necessary to heat the solution to 80 to 90 °C. Rinse
with hot water after degreasing, remove residual lye from the surface to
prevent corrosion of parts. Alkaline solution cleaning is widely used.
3. Chemical
cleaning solution
It is a chemically synthesized
water-based metal cleaning agent based on surfactants. It has strong
decontamination ability due to its surface active substance reducing
interfacial tension and causing wetting, penetrating, emulsifying and
dispersing. It also has the advantages of non-toxic, non-corrosive,
non-combustible, non-explosive, pollution-free, certain rust-proof ability, and
low cost.
II Cleaning
Method
1. Scrub
Place the parts in a container
filled with diesel, kerosene or other cleaning fluid, scrub with a cotton yarn
or brush with a brush. This method is easy to operate, simple in equipment, but
low in efficiency, and is used for small and medium-sized parts produced in
small batches.
2. Boiled
The prepared solution and the parts to be cleaned are placed together in a cleaning tank of the appropriate size welded with a steel plate. In the lower part of the pool, there is a stove for heating, and the parts are heated to 80~90 °C for cooking.
3. Spray
A cleaning fluid with a certain
pressure and temperature is sprayed onto the surface of the part to remove oil.
The method has good cleaning effect and high efficiency, but the equipment is
complicated, and is suitable for cleaning the parts with less complicated
shapes and serious grease on the surface.
4. Vibration
cleaning
It puts the cleaned parts on the
cleaning basket or cleaning rack of the vibration cleaning machine, immerses
the cleaning liquid, generates vibration by the cleaning machine to simulate
the artificial rinsing action, and cooperates with the chemical action of the
cleaning liquid to achieve the removal of oil stains. the goal of.
5.
Ultrasonic cleaning
It is achieved by the chemical
action of the cleaning liquid and the oscillating action of the ultrasonic
waves introduced into the cleaning liquid to achieve the purpose of removing
oil from the parts.
Cleaning
method for diesel generator set parts
In the repair of diesel generator
sets, it is often necessary to clean the surface of the parts of the oil,
carbon deposits, scale and rust. Due to the different nature of various soils,
the method of removal is different.
1. Oil stain
Clean
When the oil deposit on the
surface of the part is thick, it should be scraped off first. Generally, the
surface oil of the parts should be cleaned in a hot cleaning solution. The
common cleaning liquids are alkaline cleaning liquids and synthetic detergents.
When using an alkaline cleaning solution for hot cleaning, heat to 70-90 ° C,
immerse the parts for 10 to 15 minutes, then remove and rinse with clean water,
then blow dry with compressed air.
2. Carbon
removal
The removal of carbon deposits
can be accomplished by a simple mechanical removal method using a metal brush
or spatula, but it is not easy to remove the carbon deposits and to facilitate
the operation of the part surface. It is best to use chemical methods to remove
carbon deposits, that is, first use a decarburizing agent to heat to 80-90 ° C,
the carbon on the parts is expanded and softened, and then removed with a
brush.
3. Scale
removal
The scale is generally removed by
chemical removal. The caustic soda solution or hydrochloric acid solution, the
sodium fluoride hydrochloride detergent and the phosphoric acid detergent are
added to the coolant. After the engine is working for a certain period of time,
the coolant can be replaced.
Is the
cleaning frequency of the injector of the generator high or low?
The injector's injector degree is
an integral part of the unit. In order to reduce the fault of the generator
injector and ensure the normal function of the injector, the user needs to
maintain and maintain the injector. If the nozzle is not cleaned for a long
time, it will produce grease. These grease will block the injector and cause
poor fuel injection. Therefore, if the injector is to be cleaned frequently,
should the cleaning frequency of the injector be high or low?
Some people think that the nozzle
should be cleaned regularly, but this is wrong. Clean the nozzle
scientifically, or it will be useless. In fact, there are not many parts of
diesel engine parts that really need to be cleaned. One is that after the fuel
is filtered by the gasoline pump, and then filtered by the fuel filter, the
size of the impurity particles is not of the order of magnitude compared with
the gap between the nozzle and the fuel injector. Second, gasoline contains the
glue, through the gap through the high speed gasoline ejection, it is difficult
to store. What is more, countless times a day the needle valve and the contact
surface of the strong knock. Third, most models are using the outside cylinder
injection mode, the temperature here is not high, compared with the spark plug
working environment is several times better.
The really easy place to influence the
atomization should be the outside surface of the nozzle. The so-called advanced
cleaning agent, which contains benzene or benzene aromatic hydrocarbons, can
melt some of the carbon deposits while burning in the engine. The cheapest
cleaning agent is the carburetor cleaner, which can also be added to burn.
Some friends always feel good
when they see the black water flowing from behind the exhaust pipe when they
see the cleaning of carbon deposits. In fact, those 90% of blackwater is not
the generator’s internal carbon deposits. What is more, after washing and
drying, gasoline will continue to produce a certain amount of carbon, until the
state of equilibrium, no significance. On the other hand, benzene aromatic
hydrocarbon cylinder combustion temperature is much higher than gasoline, nothing
to wash the generator is not good. So don't wash it unless you have to.
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Created on Nov 9th 2018 20:11. Viewed 221 times.