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Functional Structure of Diesel Generator Set Oil Pump

Oct. 31, 2022

The function of the oil pump of the diesel generator set is to make a certain amount of oil produce a certain pressure, and then deliver it to the friction surface of each moving part of the diesel generator set for lubrication. At present, there are two types of diesel generator set oil pumps used in diesel generator sets: wheel type and rotor type.


Shangchai diesel generator


135 series diesel generators of Shanghai Diesel Industry Co., Ltd. and 6110Z, 6120Q, X6130, 6140B diesel generator sets all use this wheel type diesel generator set oil pump. 495Q, 6105Q and YC6110Q types only use the rotor to make the diesel generator set oil pump.


The structure of the diesel generator set oil pump is mainly composed of the driving wheel, the driven wheel, the pump body, the pump cover, the driven shaft, the driving shaft, the thrust bearing, the driving wheel, the bushing, the cylindrical pin and other parts. The driving wheel is installed on the driving shaft through a semicircular key, the driving shaft is fixed on the pump body and the front cover of the diesel generator set oil pump, and the driven wheel is fixed on the driven shaft and installed in the pump body, The fit between the pump body and the pump cover is located by two locating pins, and a gasket is installed between them. The clearance of the wheel end face can be adjusted by changing the thickness of the gasket.


If the clearance is too large, the oil pressure will be reduced; otherwise, if the clearance is too small, the friction resistance will increase when the oil pump of Dongguan generator rental diesel generator set rotates, which will accelerate the wear of this wheel. Under normal conditions, the clearance between the pump body and the pump cover should be 0.05~0.115mm. The transmission wheel is fixed on the front section of the driving shaft through a semicircular key and a nut, and a steel wire retainer ring is installed at the rear end to prevent the driving shaft from falling off. A thrust bearing is installed between the transmission wheel and the pump cover.


The working principle of the diesel generator set oil pump. When the diesel generator set is running, the wheel of the crankshaft drives the diesel generator set oil pump through the middle wheel to drive the wheel to rotate. The driving wheel installed inside the diesel generator set oil pump rotates with the driving shaft and drives the driven wheel to rotate in the opposite direction.


The teeth of the driving gear and the driven gear mesh to separate the pump body into two independent sealing spaces. With the high speed rotation of the gear, the oil in the gear room is brought to the pressure oil chamber, so that the oil in the pressure oil chamber is constantly increased, the pressure is increased, and the oil is pressed out from the oil outlet.


The oil in the oil suction chamber is taken away to generate a local vacuum, and the oil in the oil pan is constantly sucked into the oil suction chamber. The oil delivery pressure of the diesel generator set oil pump is generally controlled by the pressure limiting valve on the oil filter. If the oil pressure is too high, the pressure limiting valve will open to allow the oil to flow directly into the oil pan, so as to prevent the high pressure of the oil circuit and the failure of the diesel generator set oil pump.


As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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