Wide-range fuel oil nozzle suitable for overhead work

Abstract

The invention discloses a wide-range fuel oil nozzle suitable for overhead work. The wide-range fuel oil nozzle comprises a nozzle shell body, an oil separating bushing, an auxiliary oil pipeline spray nozzle, a main oil pipeline spray nozzle, a nozzle nut, a washer A and a washer B, wherein the oil separating bushing is mounted in the nozzle shell body; the auxiliary oil pipeline spray nozzle is mounted in the nozzle shell body and is close to the end surface of the oil separating bushing; the main oil pipeline spray nozzle is arranged on the outer side of the auxiliary oil pipeline spray nozzle in a sleeving manner; the washer A and the washer B are sequentially mounted on the outer side of the main oil pipeline spray nozzle and are tightly pressed by the nozzle nut; an inner cavity of the auxiliary oil pipeline spray nozzle forms an auxiliary oil pipeline vortex chamber; a main oil pipeline vortex chamber is jointly formed by an outer conical surface of the auxiliary oil pipeline spray nozzle, arranged on the auxiliary oil pipeline spray nozzle, and an inner cavity of the main oil pipeline spray nozzle; and a cooling air runner is further arranged on the nozzle nut. The work pressure of an auxiliary oil pipeline is increased to ensure that a small flow of overhead fuel oil is well atomized, so that the atomization and mixing quality of fuel oil is improved, and the efficient and stable combustion requirements of a combustion chamber under overhead low Reynolds number conditions are met.

Description

technical field [0001] The invention belongs to the technical field of engine equipment, and relates to a fuel nozzle, in particular to a wide-range fuel nozzle suitable for high-altitude work. Background technique [0002] A fuel nozzle is a device that supplies atomized fuel to an aeroengine. In order to adapt to the wide operating range of aero-engines, dual-oil fuel nozzles with wide fuel supply range, good atomization quality in each state and wide lean flameout limit are often used to supply fuel to the combustion chamber. However, when the fuel nozzle in the form of double-oil circuit and double-nozzle structure is used to supply fuel to the combustion chamber, due to the limitation of the structure of the main and auxiliary nozzles and the restriction of being blocked by dirt in the fuel, it is difficult to ensure the fuel supply and Increase fuel supply and increase spray cone angle. [0003] In order to overcome the above-mentioned disadvantages, the Chinese pate...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a fuel nozzle with a wide range suitable for working at high altitudes, so as to expand the working range of the engine and meet the requirements of the engine working at high altitudes.

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