CN-119574129-B - Method for checking startup function integrity of fuel nozzle in complete machine state

Abstract

The invention provides a method for checking the starting function integrity of a fuel nozzle in a complete machine state, which comprises the steps of connecting a nitrogen cylinder, a valve switch and a pressure gauge together and connecting the nitrogen cylinder, the valve switch and the pressure gauge together to form a pressure supply system, connecting a checked piece, namely a fuel manifold with the nozzle, with the pressure supply system in series for a switching section designed for adapting to the checking method in the complete machine state, disconnecting an engine pipeline when the starting function of the fuel manifold needs to be checked, connecting the process switching nozzle and the pressure supply system in sequence to finish the starting function integrity check of the fuel nozzle, disconnecting the process switching nozzle after the check is finished, reconnecting the engine pipeline, and continuously completing a test task according to a test program by an engine. The invention has the advantage of solving the problem of checking the starting function integrity of the fuel nozzle in the whole state of the engine. The detection equipment is simple, easy to operate, high in function integration, high in precision, short in time consumption and great in economic and social benefits.

Inventors

• WANG BANGSAI
• WANG WEIDONG
• LIU YUTING

Assignees

• 中国航发沈阳黎明航空发动机有限责任公司

Dates

Publication Date

20260512

Application Date

20241106

Claims (1)

1. 1. A method for checking the starting function integrity of a fuel nozzle in a complete machine state is characterized in that a nitrogen cylinder (1), a valve switch (2) and a pressure gauge (3) are connected together to form a pressure supply system by a gas supply pipeline, a process transfer nozzle (4) is an transfer section designed to adapt to a checking method in the complete machine state, a checked piece, namely a fuel manifold with a nozzle, can be connected with the pressure supply system in series, when the starting function of the fuel manifold is required to be checked, an engine pipeline is disconnected, the process transfer nozzle (4) and the pressure supply system are sequentially connected to finish the starting function integrity check of the fuel nozzle, the process transfer nozzle (4) is disconnected after the check is finished, the engine pipeline is reconnected, and an engine continues to finish a test task according to a test program; The nitrogen gas cylinder (1) is used for filling nitrogen gas into the fuel oil main pipe with the nozzle, the nitrogen gas pressure is raised to the starting complete opening pressure and the critical opening pressure in the normal working process of the fuel oil nozzle, whether the opening and closing functions of the fuel oil nozzle are normal or not is checked, and then the completeness of the starting functions is judged.

Description

Method for checking startup function integrity of fuel nozzle in complete machine state Technical Field The invention relates to the field of aero-engines, in particular to a method for checking the integrity of a starting function of a fuel nozzle in a complete machine state. Background The fuel nozzle is used as an important component of an engine fuel supply system, and the starting functional integrity of the fuel nozzle directly influences the safe and reliable operation of the engine. In order to meet the requirements of engine assembly and test run mode transition, the starting function integrity of a fuel oil main pipe needs to be checked in the whole engine state, and no checking method exists at present. Disclosure of Invention The invention aims to solve the problem that the existing engine is not provided with a method for checking the starting function of a fuel nozzle in the whole state of the engine by the method for checking the starting function of the closed fuel nozzle in the whole state of the engine, and realize accurate detection of the starting function of the fuel nozzle. The invention provides a method for checking the integrity of a fuel nozzle starting function in a complete machine state, which is characterized in that a nitrogen cylinder 1, a valve switch 2, a pressure gauge 3 and a gas supply pipeline which is formed by connecting the nitrogen cylinder, the valve switch 2 and the pressure gauge 3 together form a pressure supply system, a process switching nozzle 4 is a switching section designed for adapting to a checking method in the complete machine state, a checked piece, namely a fuel manifold with a nozzle, can be connected with the pressure supply system in series, when the starting function of the fuel manifold is required to be checked, an engine pipeline is disconnected, the process switching nozzle 4 and the pressure supply system are sequentially connected to finish the integrity check of the fuel nozzle starting function, the process switching nozzle 4 is disconnected after the check is finished, the engine pipeline is reconnected, and an engine continues to finish a test task according to a test procedure. And (3) performing a sealing pressure test on the fuel oil main pipe with the nozzle by utilizing nitrogen, so as to realize the inspection of the starting function integrity of the fuel oil nozzle in the whole machine state. The sealing pressure test equipment comprises a pressure source, namely a nitrogen bottle 1, a pressure regulating device, namely a valve switch 2, a pressure gauge 3, and a process transfer nozzle 4 which is an interface for realizing the measurement and transfer of the state of the whole engine. The nitrogen gas cylinder 1 is used for filling nitrogen gas into the fuel oil main pipe with the nozzle, the nitrogen gas pressure is raised to the starting complete opening pressure and the critical opening pressure in the normal working process of the fuel oil nozzle, whether the opening and closing functions of the fuel oil nozzle are normal or not is checked, and then the integrity of the starting functions is judged. Compared with the prior art, the invention has the advantages that: According to the method for checking the starting function integrity of the fuel nozzle in the whole engine state, the problem of checking the starting function integrity of the fuel nozzle in the whole engine state is solved by checking the closed fuel nozzle through the sealing pressure test. The detection equipment designed for the detection method is simple, easy to operate, high in function integration, high in precision and short in time consumption, is greatly convenient for the detection flow of the fuel oil main pipe in the engine test process, and has great economic and social benefits. Drawings The invention will be described in further detail with reference to the accompanying drawings and embodiments: FIG. 1 is a schematic diagram of an engine in a conventional state; FIG. 2 is a schematic diagram of a method of checking fuel nozzle activation functions; in the drawing the view of the figure, 1-nitrogen bottle, 2-valve switch, 3-pressure gauge and 4-process adapter. Detailed Description The present invention will be further explained with reference to specific embodiments, but the structure, proportion, size, etc. shown in the drawings are only used for understanding and reading by those skilled in the art, and are not intended to limit the applicable limitations of the present invention, so that any structural modification, proportional relation change or size adjustment does not have any technical significance, and all fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and achievement of the present invention. The invention provides a method for checking the integrity of a fuel nozzle starting function in a complete machine state, which is characterized in that a nitrogen cylinder 1, a