System and method for detecting air leakage on combination surface of engine case
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An engine casing and detection method technology, applied in the testing of machine/structural components, testing of fluid tightness, measuring devices, etc., can solve problems such as damage, high noise, and affecting engine efficiency, so as to improve the reliability of use, Avoid detecting missed effects
Inactive Publication Date: 2019-03-19
AECC AVIATION POWER CO LTD
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Once the casing joint surface leaks, it will not only affect the efficiency of the engine, but also affect or damage the anti-icing system and accessory system, which will seriously affect the reliable operation of the engine
[0003] Regardless of whether it is used on the bench or in the field, it is impossible to use manual methods to check the sealing of the joint surface of the casing. There are three difficulties in manual inspection. Except), the minimum is above 150°C. Once the gas inside the casing leaks, it is easy to burn the human
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Embodiment 1
[0043] Such as Figure 4 As shown, the non-hand-held infrared thermometer is used to test the sealing of the joint surface of the circumferential installation edge of the casing.
[0051] 2) Measurement data of the joint surface of the circumferential installation edge of the high-pressure compressor casing
[0052] The engine test speed is 96.58% N H , measure the temperature at the joint surface of the rear mounting edge of the high-pressure compressor casing, take an average of 120 test points along the circumferential direction, and record the temperature val...
Embodiment 2
[0060] Such as Figure 5 As shown in , a non-hand-held infrared thermometer was used to test the sealing of the joint surface of the axial mounting edge of the casing.
[0061] 1) The model and parameters of the non-handheld infrared thermometer are the same as those in Embodiment 1.
[0062] 2) Measurement data of the joint surface of the axial mounting edge of the high-pressure compressor casing
[0063] The engine test speed is 95.38% N H , measure the temperature at the joint surface of the axial mounting edge of the high-pressure compressor casing, take an average of 60 test points along the axial direction, and record the temperature value of each test point in the following table:
[0064] The measured value of the temperature at the joint surface of the axial mounting edge of the high-pressure compressor casing (°C)
[0065] serial number
temperature
serial number
temperature
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temperature
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temperature
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Abstract
The invention discloses a system and a method for detecting air leakage on a combination surface of an engine case. The system for detecting air leakage on the combination surface of the engine case comprises a temperature measuring instrument and a data acquisition display, wherein the temperature measuring instrument is fixed, and the measuring range of the temperature measuring instrument is covered by the surface of the case to be measured; the data acquisition display converts the temperature data acquired by the temperature measuring instrument into a thermal image for display. The method for detecting air leakage on the combination surface of the engine case comprises the following steps: 1. a plurality of temperature measuring instruments are adopted, so that the measuring range ofthe temperature measuring instrument is covered by the surface of the case to be measured, and an engine starts to work to scan the joint surface of the mounting edge of the case to be measured; 2, the temperature data detected by the temperature measuring instrument is transmitted to the data acquisition display; 3, the thermal image displayed by a display is acquired, the position of the air leakage is judged according to the color difference of the thermal image at different positions, and if the color of a certain part is inconsistent with the color of other parts in the same color area,the part is the air leakage part. The system and method for detecting air leakage on the combination surface of the engine case is used for determining whether the combined surface of the case leaks or not and the leaking part in the bench test run and the field use, and adopts a targeted control measure to improve the use reliability of the engine.
Description
technical field [0001] The invention belongs to the field of aero-engine testing, and relates to a detection system and method for air leakage at the joint surface of an engine casing. Background technique [0002] With the advancement of science and technology, higher requirements are put forward for the design, manufacture and testing of aero-engines, in order to achieve the high-performance and high-reliability technical indicators of aero-engines. There is a further understanding of the problem that air leakage will cause insufficient performance of the engine. Aeroengine casing components not only provide mounting locations for stator assemblies, but also provide passages for airflow through the working blades. The connection must be safe and reliable, and at the same time, in order to reduce the loss of air leakage, the joint surface of the connection must have good sealing. Once the casing joint surface leaks, it will not only affect the efficiency of the engine, bu...
Claims
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