Diesel pumps are widely used in urban water
supply, large-scale hydraulic engineering, farmland irrigation, drainage,
drainage pumping stations, power stations, mines, industrial water supply
systems, air-conditioning systems, fire systems, shipbuilding industry, but
also suitable for general purposes in the refining industry. It includes diesel
engine water pump, engine driven
trash pump, trailer mounted pump, engine driven fire fighting pump, diesel engine irrigation pumps etc.
Now the structure and technical parameters of
the diesel pump are introduced by means of graphic method.
Firstly, diesel pump structure characteristics
of the description
1, Diesel engine pump and engine driven trash
pump compared with a long life, high efficiency, reasonable structure, low
operating costs, installation and maintenance of convenient features. The
suction inlet and discharge of the diesel engine pump are under the axial line
of the pump, and the horizontal direction is perpendicular to the axis, and the
pump casing. In open, maintenance without disassembly of water, discharge lines
and motor (or other original motive) from the coupling to the direction of the
pump, the pump is the reverse direction of the needle rotation.
2, The main diesel engine water pump are: pump
body, pump cover, impeller, shaft, double suction sealing ring, bushings,
bearings and so on. The material of the diesel engine pump can be copper, cast
iron, ductile iron, 316 stainless steel, 416;7 rust steel, two-way steel,
Hastelloy alloy, Mongolia alloy, titanium alloy and 20th alloy and other
materials.
3, The pump body and the pump cover to form the
impeller of the studio, in and out of the water is installed on the vacuum
gauge and pressure gauge tube screw hole, the lower part of the water and water
flange system has a pipe screw hole.Flanges are manufactured in GB and can also
be made with ISO, DIN, BS or ANSI standards.
4, The hydraulic design of the impeller adopts
the most advanced CFD technology, thus improving the hydraulic efficiency of
the diesel engine pump.The impeller after the static balance check, with the
sleeve and the two sides of the sleeve nut fixed on the shaft, the axial
position can be adjusted through the bushing nut, the axial force of the
impeller to use the symmetrical arrangement of the blades to achieve balance,
there may be some residual axial force of the same shaft end bearing bear.
5, The pump shaft of the diesel engine is
supported by two sets of rolling bearings, installed at both ends of the pump
body. The unique bearing body design allows the bearing to be lubricated with
grease or dilute oil, bearing design life of more than 100,000 hours, can also
use double-row thrust bearings and closed bearings. The pump body is equipped
with double suction sealing ring, which is easy to disassemble and replace. The
diesel pump is driven directly by the motor by an elastic pin coupling or a
metal-laminated coupling. The driver can also adopt internal combustion engine
and gas turbine.
6, The diesel engine water pump sleeve can use
a variety of different materials to prevent the shaft from corrosion and wear,
bushings can be replaced. Wear ring pump Body and impeller between the use of
replaceable wear ring, to prevent the pump body and impeller wear, easy
replacement, low maintenance costs, while ensuring running clearance and high
efficiency.
7, The diesel engine water pump shaft seal can
use packing seal, also can use mechanical seal. The shaft seal cooling flushing
water can enter the shaft seal cavity through the groove on the open surface of
the pump cover, or through the external cooling water pipe into the shaft
sealing cavity.
Do not need to disassemble and remove the water
and electric motor for maintenance convenience. Depending on user needs, can
change the pump structure size.
Secondly, diesel engine water pump technical
parameters
Pump inlet diameter dn:100∽1400mm
Flow Q: Up to 1800m3/h
Head h: Up to 135m
Operating pressure P: up to 2.5MPa
Operating temperature T: up to 135°c Diesel
Engine water pump is an important part of diesel fuel supply system, its
working condition is good or bad, which directly influences the power, economy
and reliability of diesel engine.
Now say the diesel engine water pump four kinds
of automatic protection function. Automatic protection function of diesel pump
1, Start-up protection: If the unit three start
is unsuccessful, output start failure signal and lockout automatic working
system. Buzzer alarm, alarm light flashing, according to mute button silencing,
sound alarm disappears, alarm led to Matt indication.
2, Overspeed protection: Diesel engine pump In
the course of operation, if there is a speed ≥1750rpm (10% rated speed) fault,
immediately issued a sound and light alarm, buzzer alarm, alarm lights
flashing, according to mute button silencing, sound alarm disappears, alarm led
to Matt indication.At the same time the diesel engine spin down and
immediately.
3, Water temperature high protection: diesel
engine water pump in the course of operation, if there is water temperature ≥95℃
fault, buzzer immediately alarm, alarm lights flashing, according to mute
button silencing, sound alarm disappears, alarm led to Matt indication. At the
same time the diesel engine spin down, delayed 3 minutes after shutdown.
4, Oil low protection: During the operation of
the unit, if there is a hydraulic ≤0.2mpa fault, immediately issued a sound and
light alarm, buzzer alarm, alarm lights flashing, according to mute button
silencing, sound alarm disappears, alarm led to Matt indication. At the same
time the diesel engine spin down and immediately.
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