A kind of fuel back pressure valve system for marine double engine and double propeller

Abstract

The invention relates to a fuel back pressure valve system for marine double engines and double propellers. The fuel back pressure valve system with the marine double engines and double propellers isconnected to a fuel inlet pipe between the two marine diesel engines and a fuel tank. The two diesel engines are each provided with an oil inlet, an oil outlet and a back pressure valve outlet. The fuel back pressure valve system is characterized in that the fuel back pressure valve system comprises a back pressure valve, a self-cleaning filter, a heater, a fuel circulating pump, an air valve, a safety valve and a fuel pump; and the back pressure valve is connected with the two diesel engines at the same time and controls the fuel inlet pressure of the two diesel engines, and when the fuel inlet pressure exceeds the set pressure value, the back pressure valve automatically releases fuel to reduce the pressure, maintain the fuel inlet pressure within the set pressure value and protect the stable operation of the fuel system and the diesel engines. According to the fuel back pressure valve system, the two marine diesel engines share one fuel back pressure valve system, so that the effects of reducing cost and saving space are achieved, meanwhile, the application range is wide, and the fuel back pressure valve system can be used for a power structure scheme that two or more diesel engines are arranged on the same ship.

Description

technical field [0001] The invention relates to a fuel oil system of a diesel engine, in particular to a fuel back pressure valve system of a marine double engine and double propeller, which belongs to the technical field of diesel engines. Background technique [0002] At present, marine low-speed diesel engines are equipped with fuel back pressure valves. The back pressure valve operates through the elastic force of the built-in spring. When the fuel inlet pressure is lower than the set pressure value, it will block the pipeline under the action of the spring force to maintain the pressure in the pipeline; when the fuel inlet pressure exceeds the set pressure value , the spring is compressed and the fuel is released through the back pressure valve to release the pressure. Therefore, when the pressure in the fuel pipe is unstable, the pressure required by the pipeline can be maintained by means of the back pressure valve, so as to ensure the smooth operation of the diesel ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to solve the problem of increased cost caused by the use of a double-engine double-blade fuel back pressure valve system in the same ship, and provide a marine double-engine double-blade fuel back pressure valve system so that two diesel engines share a set of fuel oil Back pressure valve system to reduce cost and save space

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