Straight-through type piezoelectric outer guide gas injection valve with float valve seat

Abstract

The invention aims to provide a straight-through type piezoelectric outer guide gas injection valve with a float valve seat. Through the float valve seat structure, the function of avoiding reverse leakage caused by unbalanced pressures inside and outside the gas injection valve is achieved, and the operation reliability of the gas injection valve is ensured; the gas inlet and flow guiding processes are achieved through a straight-through structure and a flow guiding cavity structure; control over a valve element and a gas path is achieved through control of a piezoelectric actuator, and the gas injection function is achieved; through cooperation of an outer guide structure, a pressure balance hole and a pressure balance groove, the verticality of the valve element is ensured, stable operation and reliable operation of gas flow are achieved, and the high response speed is achieved; through a mixed gas inlet mode of axial main gas groove direct gas inlet and circumferential supplementation hole gas inlet, high flow is achieved, the gas supply efficiency of an engine is effectively improved, meanwhile, gas flow interference can be avoided, and gas path stability is achieved; and through a plurality of annulus structures between the valve element and the valve seat, face seal of the gas injection valve is achieved, and the high reliability is also achieved.

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

Images