Method for checking the integrity of the starting function of fuel injectors in the assembled state

Abstract

The application provides a method for checking the starting function integrity of fuel injection nozzle in the whole machine state, a nitrogen cylinder, a valve switch, a pressure gauge and a gas supply pipeline connected together to form a pressure supply system; a process adapter nozzle is a designed adapter section for adapting the checking method in the whole machine state, which can connect the fuel manifold with the nozzle to be in series with the pressure supply system; when the starting function of the fuel manifold needs to be checked, the engine pipeline is disconnected, the process adapter nozzle and the pressure supply system are connected in sequence to complete the starting function integrity checking of the fuel injection nozzle; after the checking 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 procedure. The application has the advantages that the starting function integrity of the fuel injection nozzle in the whole machine state of the engine is checked, the detection equipment is simple, easy to operate, high in function integration, high in precision, short in time consumption, and has great economic and social benefits.

Description

Technical Field

[0001] This invention relates to the field of aero-engines, and in particular to a method for checking the integrity of the fuel nozzle start-up function in the condition of the entire engine. Background Technology

[0002] As a crucial component of the engine's fuel supply system, the integrity of the fuel injector's starting function directly impacts the engine's safe and reliable operation. To adapt to the changing needs of engine assembly and testing, it is necessary to check the integrity of the fuel manifold's starting function while the engine is in its entirety. Currently, there is no method for this. Therefore, a method for checking the starting function of closed-loop fuel injectors while the engine is in its entirety has been invented to meet the inspection requirements during engine testing. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that there is no existing method for checking the fuel injector starting function in the state of an engine when the engine is in its entirety, and to achieve accurate detection of the fuel injector starting function.

[0004] This invention provides a method for checking the functionality of fuel injectors in a fully functional state. The method is characterized by: a nitrogen cylinder 1, a valve switch 2, and a pressure gauge 3, along with a gas supply line connecting these three components, forming a pressure supply system; a process adapter 4, designed to adapt to the inspection method in a fully functional state, connecting the component under inspection, i.e., the fuel main with injectors, in series with the pressure supply system; when checking the fuel main's starting function, the engine line is disconnected, and the process adapter 4 and the pressure supply system are connected sequentially to complete the fuel injector starting function functionality check; after the check is completed, the process adapter 4 is disconnected, the engine line is reconnected, and the engine continues to complete the test run according to the test procedure.

[0005] A sealing pressure test is performed on the fuel main with nozzles using nitrogen gas to check the functionality of the fuel nozzles while the engine is in its entirety. The sealing pressure test equipment includes: a pressure source (nitrogen cylinder 1), a pressure regulating device (valve switch 2), a pressure gauge 3, and a process adapter 4 for measuring the overall engine condition.

[0006] By filling the fuel main with nozzles into nitrogen cylinder 1, the nitrogen pressure is increased to the full opening pressure and critical opening pressure of the fuel nozzle during normal operation. The opening and closing function of the fuel nozzle is checked to determine whether the starting function is intact.

[0007] Compared with the prior art, the advantages of this invention are:

[0008] The method for checking the functionality of fuel injectors in a fully functional engine state, as described in this invention, solves the problem of checking the functionality of fuel injectors in a fully functional engine state by performing a sealing pressure test on closed fuel injectors. The testing equipment designed for this method is simple, easy to operate, highly integrated, accurate, and quick, greatly simplifying the inspection process of the fuel mains during engine testing, resulting in significant economic and social benefits. Attached Figure Description

[0009] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

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

[0011] Figure 2 A schematic diagram illustrating a method for checking the starting function of fuel injectors;

[0012] In the diagram, 1—nitrogen cylinder, 2—valve switch, 3—pressure gauge, and 4—process adapter. Detailed Implementation

[0013] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention. The structures, proportions, sizes, etc. shown in the accompanying drawings are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0014] This invention provides a method for checking the functionality of fuel injectors in a fully functional state. The method is characterized by: a nitrogen cylinder 1, a valve switch 2, and a pressure gauge 3, along with a gas supply line connecting these three components, forming a pressure supply system; a process adapter 4, designed to adapt to the inspection method in a fully functional state, connecting the component under inspection, i.e., the fuel main with injectors, in series with the pressure supply system; when checking the fuel main's starting function, the engine line is disconnected, and the process adapter 4 and the pressure supply system are connected sequentially to complete the fuel injector starting function functionality check; after the check is completed, the process adapter 4 is disconnected, the engine line is reconnected, and the engine continues to complete the test run according to the test procedure.

[0015] A sealing pressure test is performed on the fuel main with nozzles using nitrogen gas to check the functionality of the fuel nozzles while the engine is in its entirety. The sealing pressure test equipment includes: a pressure source (nitrogen cylinder 1), a pressure regulating device (valve switch 2), a pressure gauge 3, and a process adapter 4 for measuring the overall engine condition.

[0016] By filling the fuel main with nozzles into nitrogen cylinder 1, the nitrogen pressure is increased to the full opening pressure and critical opening pressure of the fuel nozzle during normal operation. The opening and closing function of the fuel nozzle is checked to determine whether the starting function is intact.

[0017] By conducting a sealing pressure test on the closed fuel injectors, the problem of checking the functionality of the fuel injectors during engine operation was solved. The testing equipment designed for this method is simple, easy to operate, highly integrated, accurate, and quick, greatly simplifying the inspection process of the fuel manifold during engine testing, resulting in significant economic and social benefits.

[0018] Matters not covered in this invention are common knowledge.

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

Claims

1. A method for checking the functionality of a fuel injector in a fully functional state, characterized in that: The nitrogen cylinder (1), valve switch (2), and pressure gauge (3), along with the gas supply pipeline connecting the three, constitute a pressure supply system; the process adapter (4) is a connecting section designed to adapt to the inspection method under the condition of the whole machine, which can connect the inspected part, i.e., the fuel main with nozzle, to the pressure supply system in series; when it is necessary to check the fuel main starting function, disconnect the engine pipeline and connect the process adapter (4) and the pressure supply system in sequence to complete the fuel nozzle starting function integrity check; After the inspection is completed, disconnect the process adapter (4), reconnect the engine pipeline, and the engine continues to complete the test run according to the test run procedure. By using a nitrogen cylinder (1) to fill the fuel main with a nozzle with nitrogen, the nitrogen pressure is increased to the start-up fully open pressure and critical open pressure during the normal operation of the fuel nozzle. The opening and closing function of the fuel nozzle is checked to determine whether the start-up function is intact.

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