气体燃料喷射器静密封设计研究

Study on Static Sealing Design of Gas Fuel Injector

气体物态为主的低碳或零碳燃料逐渐成为研究热点,氢气作为零碳燃料有广阔的应用前景。对于氢气来说,可燃范围很广,对其喷射器密封要求很高,必须对其密封性进行深入的研究。以平行圆板理论泄漏模型为基础,应用粗糙表面的平均流量模型和接触模型对气体燃料喷射器的静密封特性进行分析。比较了不同参数下对接触面表面粗糙度的设计要求,可为气体燃料喷射器密封面的设计和精密加工提供一定的参考。

Low-carbon and zero-carbon gaseous fuels had gradually become hot research spots. Hydrogen, as one of zero-carbon fuel, has a broad application prospect. Hydrogen has a wide flammability range. The requirement for its injector static sealing is very high, and sealing design must be studied carefully. It investigates on the static sealing based on the theoretical leakage model of parallel circular plates. The static sealing characteristics of gas fuel injectors are analyzed using average flow models and contact models for rough surfaces. The design requirements for surface roughness of contact surfaces under different parameters are compared. It can provide a certain reference for the design and precision machining of gas fuel injector sealing surfaces.