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Aviation aluminum-based stainless steel folding filter element cleaning and detecting method

A technology of folding filter element and detection method, applied in the field of aviation maintenance, can solve the problems of affecting the accuracy of engine test results, affecting the quality of oil, and high damage rate, and achieving the effect of shortening cleaning time, increasing cleaning frequency and reducing contact time.

Active Publication Date: 2019-09-10
PLA NO 5719 FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once such a damaged filter element is installed, it will affect the quality of the oil, thereby affecting the accuracy of the engine test results
The detection of broken filter elements usually only relies on simple visual inspection, and its accuracy is too poor. Usually only large cracks can be found, and small cracks are difficult to find, and these small cracks are fatal in high-precision filter elements.
The higher the filtration accuracy of the filter element, the higher its damage rate during handling, installation or use.
In addition, when the aluminum-based stainless steel pleated filter element is cleaned in alkaline solution, it will cause certain damage

Method used

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  • Aviation aluminum-based stainless steel folding filter element cleaning and detecting method

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specific Embodiment

[0027] As shown in Figure 1, the specific embodiment of the present invention mainly includes the following steps:

[0028]Soak the filter element to be cleaned with RP-3 aviation kerosene for 2 hours. During the soaking process, take it out every 40 minutes and blow it back and forth with low-pressure compressed air. The soaking temperature is 60-70°C. During the long-term use of the filter element, impurities such as grease have adhered tightly to the surface of the filter element, causing the filter element to be blocked, and grease is easily soluble in organic solutions, so RP-3 aviation kerosene is used to soak the filter element; After soaking in kerosene, it gradually dissolves or does not adhere so tightly to the surface of the filter element. After soaking for half an hour, use low-pressure compressed air to carry out forward and reverse blowing on the filter element to achieve preliminary removal of the adhesion on the surface of the filter element, or reduce The adh...

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Abstract

The invention discloses an aluminum-based stainless steel folding filter element cleaning and detecting method. The aluminum-based stainless steel folding filter element cleaning and detecting methodcomprises the following steps of: (1) kerosene soaking; (2) rinsing; (3) bubble test; (4) ultrasonic rough washing; (5) ultrasonic fine washing; (6) secondary bubble test; and (7) flow rate test. Theinvention selects kerosene to soak the filter element, so that the unnecessary oil contamination on the surface of the filter element can be removed, and meanwhile, the corrosion of the filter elementis reduced, the single cleaning time is reduced, the number of cleaning is increased, and the corrosion of an alkaline cleaning solution on the filter element is reduced; and the bubble tests are provided before and after the filter element cleaning, so that the damaged filter element is strictly screened. Through the aluminum-based stainless steel folding filter element cleaning and detecting method, the aluminum-based stainless steel folding filter element can be cleaned, and the qualified filter element can be screened out.

Description

technical field [0001] The invention relates to a method for cleaning and detecting aluminum-based stainless steel folding filter elements used in aviation, in particular to a high-precision aluminum-based filter element with three layers of filter surfaces used for filtering RP-3 aviation kerosene and 8B aviation lubricating oil in the maintenance of aircraft engines. The invention discloses a cleaning method for a stainless steel folded filter element and a detection method thereof, which belong to the field of aviation maintenance. Background technique [0002] After the aircraft has been flying for a certain period of time, its engine needs to be regularly maintained on the ground and subjected to performance tests. In order to save cost, the RP-3 aviation kerosene and 8B lubricating oil used in the test will be reused. In order to ensure the quality of the oil, a high-precision aluminum-based stainless steel folded filter element with three layers of filter surfaces is...

Claims

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Application Information

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IPC IPC(8): G01N15/08B08B3/12B08B3/08B08B3/02
CPCB08B3/02B08B3/08B08B3/12G01N15/08G01N2015/084
Inventor 程思恩李凯罗春朱晔李栋苏勇陈永彭王进
Owner PLA NO 5719 FACTORY
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