Bypass type outer guiding gas injection valve with floating valve seat

Abstract

The invention aims at providing a bypass type outer guiding gas injection valve with a floating valve seat. Through a floating valve seat structure, the function that reverse leakage caused by unbalanced inner pressure and outer pressure of the gas injection valve is avoided is achieved, and work reliability of the gas injection valve is guaranteed. The gas inflow and flow guiding process is achieved through a bypass structure and a flow guiding cavity structure. Valve element control is achieved through executer control, and the gas valve gas injection function is achieved through gas path control. Through cooperation of an outer guiding structure, a pressure balance hole and a pressure balance groove, perpendicularity of a valve element is guaranteed, gas flow stable work is achieved, reliable work is achieved, and the high response speed is achieved. Through the mixed gas inflow manner of direct gas inflow of an axial main gas groove and gas inflow of a circumferential gas supplementing hole, large flow is achieved, and the gas supply efficiency of an engine is effectively improved; and meanwhile, gas flow interference can be avoided, and gas path stability is achieved. Through a multi-girdle structure between the valve element and the valve seat, face sealing of the gas injection valve is achieved, and reliability is high.

Description

technical field [0001] The invention relates to a gas injection valve, in particular to a gas injection valve for a natural gas engine. Background technique [0002] In recent years, with the rapid growth of my country's oil consumption, oil is heavily dependent on imports. Natural gas burns cleanly and has abundant reserves in my country, making it the most likely fuel to replace diesel. Natural gas engines have good application prospects as ship power, especially as propulsion power for inland watercraft. As a fuel supply device for a natural gas engine, the performance of the gas injection valve directly determines the economy and emission performance of the natural gas engine. At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engi...

AI Technical Summary

Problems solved by technology

At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engine and engine performance

In the case of severe engine operating conditions, the injection valve is prone to reverse leakage

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