Coaxial gas injection valve with floating valve seat and with adjustable circulation section area

Abstract

The invention aims at providing a coaxial gas injection valve with a floating valve seat and with the adjustable circulation section area. Through a double-valve-element and double-electromagnet controlled structure, the adjustable gas injection flow is achieved. 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. Through cooperation of an outer guiding structure, an inner flow guiding cavity and a pressure balance groove, perpendicularity of valve elements is guaranteed, stable work of gas flow is achieved, work is reliable, and the high response speed is achieved. The mixed gas inflow manner of direct gas inflow through an axial main gas groove and gas inflow through a circumferential gas supplementing hole, large flow is achieved, the gas supply efficiency of an engine is effectively improved, meanwhile gas flow interference can be avoided, and stability of a gas path is achieved. Through a multi-girdle structure between the valve elements 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 of a natural gas engine gas system. Background technique [0002] The problem of environmental pollution is becoming more and more serious, the requirements for emission indicators are becoming more and more stringent, and the demand for high-power gas generators in the market continues to grow. With the use of large-scale gas engines, the manufacture, maintenance and repair of key components have become important factors restricting the development of gas engines, and gas injection valves are such key components. The gas injection valve is one of the core components of gas fuel electronically controlled multi-point injection gas engine including dual fuel engine. Power and emissions have a very important impact. Injection valves need to work for thousands of hours under harsh working conditions such as high temperature and high pressure, and maintenance work such ...

AI Technical Summary

Problems solved by technology

Injection valves need to work for thousands of hours under harsh working conditions such as high temperature and high pressure, and maintenance work such as disassembly will lead to gradual accumulation of errors, which will eventually make it difficult to debug the injection valve

[0003] In the case of severe engine operating conditions, the injection valve is prone to reverse leakage

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