Common Reasons of Increased Diesel Engine Oil Flow Resistance
by Starlight Generator dieselgeneratortechStarlight power generation equipment will briefly introduce the common
reasons for the oil flow resistance increase to the generator set. If
you still have any question of the problem, welcome to visit our website
to get more information.
The viscosity of the generator set
oil is too large: the viscosity of the generator set oil indicates the
internal friction resistance when the oil flows. The oil viscosity is
related to the engine temperature. When the engine temperature is low,
the oil viscosity is high; otherwise, the oil viscosity is small. When
the oil viscosity is large, the fluidity is poor, but the sealing
performance is good, and the leakage is small. If the oil viscosity
exceeds the specified value, the oil flow resistance in the lubrication
system will increase, and the pressure will increase at the same time.
It can be seen from this that when the engine temperature is low or the
viscosity of the oil itself is high (due to the improper selection of
the oil grade, that is, the oil grade is not suitable for the ambient
temperature, such as the selection of oil with high viscosity in summer
in winter), the oil pressure will be high.
The clearance of the pressure lubrication part of the generator set is
too small or the oil filter is blocked: from the lubricating oil
circuit, the flow resistance of the oil circulation circuit of the
lubrication system is equal to the sum of the reciprocal of the oil flow
resistance of the parallel branch. The camshaft journals, connecting
rod journals, crankshaft journals, rocker shafts, etc. of the pressure
lubricated parts, if the matching clearance of these lubricating parts
is too small, the filter element of the fine filter is dirty and the oil
circuit is blocked, and the pressure limiting valve is adjusted. If the
pressure is too high, the flow resistance of the lubricating oil
circuit will increase and the pressure will increase.
Improper adjustment of the pressure limiting valve of the generator set:
The pressure limiting valve is limited by the balance spring and the
ball valve (or cone valve) to limit the oil pressure, so that the oil
pressure does not exceed the specified value in the technical documents.
When the oil pressure exceeds the specified value, the valve will be
pushed open to release the pressure in the system against the elastic
force of the spring. When the oil pressure is lower than the elastic
force of the spring, the valve will be closed under the action of the
spring, thereby limiting the pressure within the specified range. From
this point of view, the oil pressure of the lubrication system depends
on the size of the spring force. If the adjusted spring force is too
large, the oil pressure in the system will be too high.
Starlight Power was founded in 1974 and is one of the earliest
manufacturers of generators and diesel generator sets in China. If you
want get more information, please feel free to send email to
sales@dieselgeneratortech.com we will pay highly attention on your
question.
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Created on May 6th 2022 02:37. Viewed 157 times.
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