The diesel pump truck is a mechatronic device that is directly driven by a diesel engine and can start and complete the water supply in a short time. Diesel pump trucks are powered by diesel and do not require an external power supply. Diesel pump trucks are suitable for agricultural irrigation, disaster relief, smelting, hangars, petrochemical oil depots, power plants, liquefied gas stations, textiles and other fire-fighting water supply occasions, especially in the absence of electricity, the grid can not be satisfied, the choice of diesel pump truck is safe Pick.
The pump body and the pump cover of the diesel engine pump constitute the working chamber of the impeller, and a screw hole for installing a vacuum gauge and a pressure gauge is formed on the inlet and outlet flange, and a screw hole for discharging the water is formed in the lower part of the inlet and outlet water flange. The hydraulic design of the diesel engine pump impeller adopts the CFD technology, thus improving the hydraulic efficiency of the diesel pump truck. The impeller is statically balanced and fixed to the shaft by bushings and bushing nuts on both sides. The axial position can be adjusted by the bushing nut. The axial force of the impeller is balanced by the symmetrical arrangement of the blades, possibly There are some remaining axial forces that are bearing on the coaxial end. The pump shaft of the diesel pump truck is supported by two sets of rolling bearings and is installed at both ends of the pump body. The unique bearing body design allows the bearings to be lubricated with grease or thin oil. The design life of the bearings is over 100,000 hours. Double row thrust bearings and closed bearings can also be used. The pump body is provided with a double suction sealing ring, which is convenient for disassembly and replacement. The diesel pump truck is directly driven by the electric motor through an elastic pin coupling or a metal lamination coupling. The drive machine can also use an internal combustion engine or a gas turbine.
Diesel pump trucks have automatic protection:
(1) Start protection: If the diesel engine pump unit fails to start three times, the start failure signal is output and the automatic working system is blocked. The buzzer sounds, flashes, press the mute button to silence, the sound alarm disappears, and the alarm indicator turns to a flat light indication.
(2) High water temperature protection: When the unit is in operation, if there is a water temperature ≥95°C fault, the buzzer will immediately alarm, press the mute button to silence, the sound alarm disappears, and the alarm indicator turns to flat light. At the same time, the diesel pump truck slows down and stops after 3 minutes delay.
(3) Low oil pressure protection: When the unit is in operation, if there is oil pressure ≤0.2Mpa failure, it will immediately sound and light alarm, buzzer alarm, flashing, press silence button to silence, sound alarm disappears, alarm indicator Turned to a flat light indication. At the same time, the diesel pump truck slowed down and immediately stopped.
(4) Overspeed protection: If the speed of the unit is ≥1750rpm (10% rated speed), the unit will immediately sound and light alarm, buzzer alarm, flashing, press the silence button to silence, the sound alarm disappears, alarm The indicator light turns to a flat light indication. At the same time, the diesel pump truck slowed down and immediately stopped.
(5) Low fuel oil level protection: When the fuel oil level is lower than the specified height during the operation of the unit, the buzzer will immediately alarm and flash. Press the mute button to silence, the sound alarm disappears, and the alarm indicator turns to flat light until the oil level returns to normal. After 10 minutes, if the oil level is not restored, the buzzer will immediately alarm and flash. At the same time, the diesel pump truck slows down and stops after 3 minutes delay.
(6) Low battery voltage protection: When the diesel pump unit is in the centralized control state, when the battery voltage is lower than 22V (or 10V), the buzzer will immediately alarm, flash, press the mute button to silence, the sound alarm disappears, and the alarm The indicator light turns to a flat light indication and remains until the voltage returns to normal.
(7) Low water level protection (optional): When the diesel pump unit is in standby state or running, when the water level of the fire pool is lower than the specified height, the buzzer will immediately alarm, flash, press the mute button to silence the sound. The alarm disappears and the alarm indicator turns to a flat light indication. At the same time, the diesel engine of the diesel engine pump is decelerated, and the machine is stopped after a delay of 3 minutes.
