Double-oil-way fuel nozzle and backflow combustion chamber with same

Abstract

The invention discloses a double-oil-way fuel nozzle. The double-oil-way fuel nozzle comprises an oil distribution valve shell, a valve sleeve and a movable assembly which are sequentially arranged from outside to inside; an oil inlet and a sealing end are arranged at two ends of the oil distribution valve shell respectively, one side of the oil distribution valve shell is connected with a nozzle rod provided with a main oil way and an auxiliary oil way, an elastic piece is arranged between the movable assembly and the sealing end, and a first cavity communicated with the auxiliary oil way and a second cavity communicated with the main oil way are formed between the outer walls of two ends of the valve sleeve and the oil distribution valve shell respectively; one end of the movable assembly is provided with a through groove communicated with the oil inlet, the through groove is communicated with the oil inlet and the first cavity when the oil supply amount is small, only the auxiliary oil way supplies oil, the through groove is communicated with the second cavity when the oil supply amount is large, the oil inlet is further communicated with the first cavity, and the auxiliary oil way and the main oil way supply oil at the same time. According to the mode that the main oil way is controlled to be switched on and switched off through the oil supply amount, the atomization requirement of small-flow fuel oil in the ignition state and the requirement of large-flow oil supply at a design point are met, the ignition performance is improved, main and auxiliary way fuel oil distribution is achieved in the fuel oil nozzle, and the overall structure of the combustion chamber is simplified.

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