Method for checking integrity of starting function of fuel nozzle in complete machine state

Abstract

The invention provides a method for checking the integrity of a starting function of a fuel nozzle in a complete machine state. A nitrogen cylinder, a valve switch, a pressure gauge and a gas supply pipeline connecting the nitrogen cylinder, the valve switch and the pressure gauge together form a pressure supply system; the process switching nozzle is a switching section designed to adapt to the checking method in the whole machine state, and a checked piece, namely a fuel oil main pipe with a nozzle, can be connected with a pressure supply system in series. When the starting function of the fuel main pipe needs to be checked, the engine pipeline is disconnected, and the process adapter nozzle and the pressure supply system are sequentially connected to complete the integrity check of the starting function of the fuel nozzle; and after inspection is completed, the process adapter nozzle is disconnected, the engine pipeline is reconnected, and the engine continues to complete the test run task according to the test run program. The method has the advantage that the problem of checking the integrity of the starting function of the fuel nozzle in the whole engine state is solved. Detection equipment is simple, easy to operate, high in function integration, high in precision and short in consumed time, and has huge economic benefits and social benefits.

Description

Technical Field

[0001] The invention relates to the field of aviation engines, and in particular to a method for checking the integrity of a fuel nozzle starting function in a complete machine state. Background Art

[0002] The fuel nozzle is an important part of the engine fuel supply system, and its starting function integrity directly affects the safe and reliable operation of the engine. In order to adapt to the needs of engine assembly and test mode transformation, it is necessary to check the starting function integrity of the fuel main pipe in the state of the engine as a whole. There is currently no inspection method. Therefore, a method for checking the starting function of the closed fuel nozzle in the state of the whole machine is invented to meet the inspection needs of the engine test process. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that there is no method for checking the starting function of a closed fuel nozzle in the whole engine state by inventing a method for checking the integrity of the starting function of a closed fuel nozzle in the whole engine state, so as to realize accurate detection of the integrity of the starting function of the fuel nozzle.

[0004] The present invention provides a method for checking the integrity of the fuel nozzle starting function in the state of an entire machine, which is characterized by: a nitrogen bottle 1, a valve switch 2 and a pressure gauge 3, and a gas supply pipeline connecting the three together constitute a pressure supply system; a process adapter nozzle 4 is a switching section designed to adapt to the inspection method in the state of an entire machine, and can connect the inspected part, that is, a fuel main pipe with a nozzle, and the pressure supply system in series; when it is necessary to check the starting function of the fuel main pipe, the engine pipeline is disconnected, and the process adapter nozzle 4 and the pressure supply system are connected in sequence to complete the integrity inspection of the fuel nozzle starting function; after the inspection is completed, the process adapter nozzle 4 is disconnected, and the engine pipeline is reconnected, and the engine continues to complete the test task according to the test procedure.

[0005] The sealing pressure test of the fuel main pipe with the nozzle is carried out by using nitrogen to check the integrity of the fuel nozzle startup function in the whole machine state. The sealing pressure test equipment includes: a pressure source, namely a nitrogen bottle 1, a pressure regulating device, namely a valve switch 2, a pressure gauge 3, and a process adapter nozzle 4 for measuring the whole engine state.

[0006] By using nitrogen bottle 1 to fill nitrogen into the fuel main pipe with the nozzle, increase the nitrogen pressure to the starting full opening pressure and critical opening pressure during the normal operation of the fuel nozzle, check whether the opening and closing functions of the fuel nozzle are normal, and then judge the integrity of the starting function.

[0007] Compared with the prior art, the present invention has the following advantages:

[0008] The method for checking the integrity of the fuel nozzle starting function in the complete state of the present invention solves the problem of checking the integrity of the fuel nozzle starting function in the complete state of the engine by performing a sealing pressure test on the closed fuel nozzle. The detection equipment designed for the inspection method is simple, easy to operate, highly integrated, highly accurate, and short in time, which greatly facilitates the inspection process of the fuel main pipe during the engine test, and has huge economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0010] Figure 1 This is a schematic diagram of the engine in normal state;

[0011] Figure 2 A schematic diagram of a method for checking the fuel nozzle priming function;

[0012] In the figure, 1 is nitrogen bottle, 2 is valve switch, 3 is pressure gauge, and 4 is process adapter nozzle. DETAILED DESCRIPTION

[0013] The present invention will be further explained below in conjunction with specific implementation plans, but the present invention is not limited thereto. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0014] The present invention provides a method for checking the integrity of the fuel nozzle starting function in the state of an entire machine, which is characterized by: a nitrogen bottle 1, a valve switch 2 and a pressure gauge 3, and a gas supply pipeline connecting the three together constitute a pressure supply system; a process adapter nozzle 4 is a switching section designed to adapt to the inspection method in the state of an entire machine, and can connect the inspected part, that is, a fuel main pipe with a nozzle, and the pressure supply system in series; when it is necessary to check the starting function of the fuel main pipe, the engine pipeline is disconnected, and the process adapter nozzle 4 and the pressure supply system are connected in sequence to complete the integrity inspection of the fuel nozzle starting function; after the inspection is completed, the process adapter nozzle 4 is disconnected, and the engine pipeline is reconnected, and the engine continues to complete the test task according to the test procedure.

[0015] The sealing pressure test of the fuel main pipe with the nozzle is carried out by using nitrogen to check the integrity of the fuel nozzle startup function in the whole machine state. The sealing pressure test equipment includes: a pressure source, namely a nitrogen bottle 1, a pressure regulating device, namely a valve switch 2, a pressure gauge 3, and a process adapter nozzle 4 for measuring the whole engine state.

[0016] By using nitrogen bottle 1 to fill nitrogen into the fuel main pipe with the nozzle, increase the nitrogen pressure to the starting full opening pressure and critical opening pressure during the normal operation of the fuel nozzle, check whether the opening and closing functions of the fuel nozzle are normal, and then judge the integrity of the starting function.

[0017] By conducting a sealing pressure test on the closed fuel nozzle, the problem of checking the integrity of the fuel nozzle startup function in the complete engine state is solved. The detection equipment designed for this inspection method is simple, easy to operate, highly integrated, accurate, and time-saving, which greatly facilitates the inspection process of the fuel main during the engine test, and has huge economic and social benefits.

[0018] Matters not covered by the present invention are known technologies.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for checking the integrity of the fuel nozzle starting function in the complete machine state, characterized in that: The nitrogen bottle (1), the valve switch (2) and the pressure gauge (3) and the gas supply pipeline connecting the three together constitute a pressure supply system; the process adapter nozzle 4 is a switching section designed to adapt to the inspection method in the whole machine state, and can connect the inspected part, that is, the fuel main pipe with the nozzle, and the pressure supply system in series; when it is necessary to check the starting function of the fuel main pipe, the engine pipeline is disconnected, and the process adapter nozzle (4) and the pressure supply system are connected in sequence to complete the integrity inspection of the fuel nozzle starting function; After the inspection is completed, the process adapter (4) is disconnected and the engine pipeline is reconnected. The engine continues to complete the test task according to the test procedure.

2. The method for checking the integrity of the fuel nozzle starting function in the complete machine state according to claim 1, characterized in that: Use nitrogen to conduct a sealing pressure test on the fuel main pipe with the nozzle, so as to check the integrity of the fuel nozzle startup function 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 transfer interface for measuring the whole engine state, namely a process transfer nozzle (4).

3. The method for checking the integrity of the fuel nozzle starting function in the complete machine state according to claim 1, characterized in that: By using a nitrogen bottle (1) to fill nitrogen into a fuel main pipe with a nozzle, the nitrogen pressure is increased to the start-up full opening pressure and critical opening pressure during the normal operation of the fuel nozzle, and the opening and closing functions of the fuel nozzle are checked to be normal, thereby judging the integrity of the start-up function.

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