Dual oil circuit centrifugal nozzle structure with integrated design of main and auxiliary oil circuits

Abstract

The invention belongs to the technical field of turbine engines for small missile / unmanned aerial vehicles, and specifically relates to a double-oil-channel centrifugal nozzle structure adopting an integrated design of a main oil channel and an auxiliary oil channel. The double-oil-channel centrifugal nozzle structure comprises a main oil tube, an auxiliary oil tube, a nozzle rod, a locking sheet, a fixing nut, an auxiliary oil channel hydrocyclone, a main oil channel nozzle and an auxiliary oil channel nozzle. The double-oil-channel centrifugal nozzle structure disclosed by the invention and adopting the abovementioned technical scheme is simple and reliable; and test results indicate that the arrangement of an opening point of the main oil channel is reasonable, the double-oil-channel nozzles can meet the requirement of a high-flow adjustment ratio, the spray cone angles of the main oil channel and the auxiliary oil channel are reasonable, and fuel oil atomization of the main oil channel and the auxiliary oil channel in the whole working whole course of an engine meets a use need.

Description

technical field [0001] The invention belongs to the technical field of turbine engines for small bombs / unmanned aerial vehicles, and in particular relates to a dual oil circuit centrifugal nozzle structure with integrated design of main and auxiliary oil circuits. Background technique [0002] Such as figure 1 As shown, the working principle of fuel atomization in the combustion chamber of the turbine engine used for small bombs / UAVs is: the fuel enters the oil supply seats 101 of the fuel injection ring from the engine oil inlet, and the fuel flowing through the oil supply seats 101 flows through them in turn. Compress the screw plug 102 and the fuel swirler 103, and the fuel will rotate at a high speed after flowing through the swirl groove on the end face of the fuel swirler 103, thereby forming a low-pressure area at the center of the nozzle hole of the nozzle housing 104, and the outside air is under reverse pressure. Under the action of the difference, it enters the i...

AI Technical Summary

Problems solved by technology

In the past, a single oil circuit was commonly used for oil supply. Even if some engines use dual oil circuits, they are composed of two completely independent single oil circuits. The structure is complex and the reliability is poor.

With the improvement of the engine performance requirements for small bombs / UAVs today, a higher working ceiling is required, which makes the traditional fuel supply method unable to take into account the fuel atomization requirements of high-altitude cruise and maximum design conditions at the same time. Unable to meet the working needs of the engine with a large envelope and wide airspace, resulting in easy flame instability, combustion oscillation, and low combustion efficiency in the engine combustion chamber, and even serious engine flameout

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