A test method for verifying the effect of hot cleaning of aircraft engines

Abstract

The invention relates to a test method for verifying the hot cleaning effect of an aircraft engine. Gouache paint is applied to an axial flow compressor rotor assembly and an axial flow compressor rectifier of the aircraft engine, and the engine is hot-washed. The cleaning effect is evaluated by observing the residual condition of the gouache paint after the washing. The selected gouache paint is yellow or red, which has bright color and has a large color contrast with the axial flow compressor rotor assembly and the axial flow compressor rectifier of the aircraft engine, and is easy to observe. During the cleaning, the aircraft engine is in a starting state, so that hot engine cleaning is achieved, and the cleaning effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft engine parts, in particular to a test method for verifying the hot cleaning effect of an aircraft engine. Background Art

[0002] A certain type of aircraft engine performs missions under high salt fog atmospheric conditions. It is necessary to clean the engine intake duct after the last flight of each day to remove salt particles. The conventional cold cleaning method has a long waiting time, which brings great inconvenience to users' use and maintenance. Considering the maintainability of aircraft engines, the cleaning system is designed to achieve hot flushing to shorten the engine cleaning time and improve maintenance efficiency. During the hot flushing process of the engine, parameters such as cleaning flow, cleaning pressure, nozzle atomization particle size, atomization angle, and nozzle injection angle will directly affect the flow and distribution of the cleaning fluid in the intake duct, thereby directly affecting the overall cleaning effect. In order to effectively improve the effect of engine cleaning, it is necessary to determine appropriate cleaning parameters. How to verify the effect of hot cleaning of aircraft engines is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a test method for verifying the hot cleaning effect of an aircraft engine which is simple to operate and easy to judge.

[0004] In order to solve the above technical problems, the present invention patent applies gouache paint on the axial flow compressor rotor assembly and the axial flow compressor rectifier of the aircraft engine, the engine is hot-flushed, and the cleaning effect is evaluated by observing the residual gouache paint after flushing.

[0005] Specifically, the test method for verifying the hot cleaning effect of an aircraft engine provided by the present invention comprises the following steps:

[0006] A. Apply gouache paint on the rotor assembly and rectifier of the axial flow compressor of the aircraft engine;

[0007] B. Assemble the aircraft engine, put the aircraft engine on the test bench, start the aircraft engine, slow down the engine on the ground for 5-10 minutes, open the cleaning vehicle and introduce the cleaning fluid to perform hot cleaning on the engine;

[0008] C. After cleaning, the aircraft engine will continue to operate at a slow speed for 30-60 seconds on the ground to dry the aircraft engine, and then the aircraft engine will stop;

[0009] D. Disassemble the aircraft engine lower stand, observe the residual gouache paint on the axial compressor rotor assembly and the axial compressor rectifier, and judge the cleaning effect.

[0010] Furthermore, in step B, the cleaning liquid is tap water at room temperature, the cleaning flow rate is 0.6L / min-0.8L / min, and the total cleaning volume is 7L-8L.

[0011] Furthermore, in step A, the gouache pigment selected is yellow or red gouache pigment, which has bright color and is easy to observe.

[0012] Technical effects of the invention: (1) Compared with the prior art, the test method for verifying the hot cleaning effect of an aircraft engine of the present invention is to apply gouache paint on the axial flow compressor rotor assembly and the axial flow compressor rectifier of the aircraft engine, and then perform hot flushing on the aircraft engine. The cleaning effect can be intuitively evaluated by observing the residual gouache paint after flushing; (2) The gouache paint selected is yellow or red gouache paint, which has bright color and has a large contrast with the color of the axial flow compressor rotor assembly and the axial flow compressor rectifier of the aircraft engine, and is easy to observe; (3) During cleaning, the aircraft engine is in the starting state, so hot engine cleaning is achieved, which improves the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0014] Figure 1 This is a photo of an axial compressor rotor assembly of an aircraft engine before hot cleaning and after being coated with gouache paint;

[0015] Figure 2 This is a photo of an aircraft engine axial compressor rectifier before hot cleaning and after being painted with gouache paint;

[0016] Figure 3 This is a photo of the axial compressor rotor assembly of an aircraft engine after hot cleaning;

[0017] Figure 4 This is a photo of the axial compressor rectifier of an aircraft engine after hot cleaning. DETAILED DESCRIPTION

[0018] Example 1

[0019] The test method for verifying the hot cleaning effect of an aircraft engine in this embodiment includes the following steps:

[0020] A. Apply yellow gouache paint on the rotor assembly and rectifier of the axial flow compressor of the aircraft engine;

[0021] B. Assemble the aircraft engine, put the aircraft engine on the test bench, start the aircraft engine, slow down the ground to stabilize for 5 minutes, open the cleaning vehicle to introduce cleaning fluid to perform hot cleaning on the aircraft engine; the cleaning fluid is normal temperature tap water, the cleaning flow rate is 0.6L / min, and the total cleaning volume is 7L;

[0022] C. After cleaning, the aircraft engine will continue to operate at ground speed for 30 seconds to dry the aircraft engine, and then the aircraft engine will stop;

[0023] D. Disassemble the aircraft engine lower stand, observe the residual gouache paint on the axial compressor rotor assembly and the axial compressor rectifier, and judge the cleaning effect.

[0024] Figure 1 This is a photo of the axial compressor rotor assembly after being coated with gouache paint before hot cleaning; Figure 2 This is a photo of the axial compressor rectifier before hot cleaning and after being painted with gouache paint; the effect of the axial compressor rotor assembly after hot cleaning can be seen in Figure 3 , the effect of hot cleaning of axial compressor rectifier is shown in Figure 4 ,Depend on Figure 3 and Figure 4 It can be seen that the effects of hot cleaning of the axial flow compressor rotor assembly and the axial flow compressor rectifier can be clearly and intuitively determined.

[0025] Example 2

[0026] The test method for verifying the hot cleaning effect of an aircraft engine in this embodiment includes the following steps:

[0027] A. Apply red gouache paint on the rotor assembly and rectifier of the axial flow compressor of the aircraft engine;

[0028] B. Assemble the aircraft engine, put the aircraft engine on the test bench for testing, start the aircraft engine, stabilize it in a slow-running state on the ground for 7 minutes, open the cleaning vehicle and introduce cleaning fluid to perform hot cleaning on the aircraft engine; the cleaning fluid is normal temperature tap water, the cleaning flow rate is 0.7L / min, and the total cleaning volume is 7L;

[0029] C. After cleaning, the aircraft engine will continue to operate at ground speed for 60 seconds to dry the aircraft engine, and then the aircraft engine will stop;

[0030] D. Disassemble the aircraft engine lower stand, observe the residual gouache paint on the axial compressor rotor assembly and the axial compressor rectifier, and judge the cleaning effect.

[0031] Example 3

[0032] The test method for verifying the hot cleaning effect of an aircraft engine in this embodiment includes the following steps:

[0033] A. Apply yellow gouache paint on the rotor assembly and rectifier of the axial flow compressor of the aircraft engine;

[0034] B. Assemble the aircraft engine, put the aircraft engine on the test bench, start the aircraft engine, stabilize it in the slow running state on the ground for 10 minutes, open the cleaning vehicle and introduce the cleaning liquid to perform hot cleaning on the aircraft engine; the cleaning liquid is normal temperature tap water, the cleaning flow rate is 0.8L / min, and the total cleaning volume is 7L;

[0035] C. After cleaning, the aircraft engine will continue to operate at ground speed for 45 seconds to dry the aircraft engine, and then the aircraft engine will stop;

[0036] D. Disassemble the aircraft engine lower stand, observe the residual gouache paint on the axial compressor rotor assembly and the axial compressor rectifier, and judge the cleaning effect.

[0037] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A test method for verifying the hot cleaning effect of an aircraft engine, characterized in that: The steps include: A. Apply gouache paint on the rotor assembly and rectifier of the axial flow compressor of the aircraft engine, and the gouache paint used is yellow or red; B. Assemble the aircraft engine, put the aircraft engine on the test bench for testing, start the aircraft engine, slow down the engine on the ground for 5-10 minutes, open the cleaning vehicle and introduce the cleaning fluid to perform hot cleaning on the engine; C. After cleaning, the aircraft engine will continue to operate at a slow speed for 30-60 seconds on the ground to dry the aircraft engine, and then the aircraft engine will stop; D. Disassemble the aircraft engine lower stand, observe the residual gouache paint on the axial compressor rotor assembly and the axial compressor rectifier, and judge the cleaning effect.

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