Marine engine mechanisms and fittings.Ship’s ice, being quite compact and small, most successfully amenable to aggregation, due to the fact that they can hang a variety of mechanisms and fittings.The mounted mechanisms are driven through a system of gears and drives from the engine crankshaft.
The figure shows the scheme of the fuel pipeline of marine diesel, which includes the mechanisms and fittings hung on the engine.
The fuel from the tank 1 through the pipeline 4 through the coarse filter 5 is sucked into the main pipeline 8 by the fuel pump 6 at a pressure of 150-200 kN/m (1.5-2 kgs/cm).The performance of the fuel pump is two to three times higher than the need of the engine cylinders in the fuel, so the excess fuel through the reduction valve 7 through the pipeline 3 is bypassed into the tank 1.From the main pipeline 8, the fuel is supplied to the high-pressure fuel pumps 9, which steady one for each cylinder of the engine; sometimes they are combined into a single block structure.9 fuel pump through the high-pressure pipeline 14 through a fine filter 12 is pumped into the nozzle 11 and when you open the hole with a needle nozzle is introduced into the cylinder combustion chamber in an atomized form. The fuel, which seeps between the injector needle and its guide, is discharged through pipelines 13 and 10 into the drain tank 2 . Below is a description of the individual fuel pipeline components.
Fuel pump .The installation of such a pump provides for the creation of excess pressure in the pipeline, necessary to overcome the resistance of the pipeline and provide a fuel pump backup.With a sufficiently high location of the supply tank, providing the required fuel pressure, the booster pump may not be part of the fuel pipeline.
By design, the pumping pumps are made of rotary, gear and piston types. The figure shows a fuel pump lobe type .In the steel case 2 of the pump, the fuel enters through the hole 1 and exits through the hole 6.When the rotor 5 rotates, the cast iron blades 3, rotating together with the rotor, are pressed against the pump body by a spring 4 and a centrifugal force developing during the operation of the pump.As a result, a vacuum is formed in the cavity of the hole 1, fuel is sucked here, it is captured by the blades 3, is pumped into the cavity of the hole 6 and then into the pipeline.The sealing of the rotor roller is achieved by means of the gland 7.The rotor of the pump through the plug is driven in rotation by raspredelitelno of the motor shaft.Constant fuel pressure is maintained by the bypass valve connecting the suction and discharge cavity of the pump.
Your attention is given to the pump brand svb 1-50, this pump 1965 year of manufacture, made in Germany, despite the age and its performance the pump is in excellent condition,this unit is maintainable.The task of this unit is to cool the diesel.This unit is based on the vessel intended for cable laying.