Leakage detecting method for sealing structure part

Abstract

The invention relates to a leakage detecting method for a sealing structure part, which comprises the following steps: 1) connecting a part to be detected into a helium mass spectrometer leak detector; 2) vacuumizing the part to be detected and the helium mass spectrometer leak detector; 3) blowing helium to the part to be detected; and 4) carrying out sealing detection to the part to be detected according to the indication situation of an output meter of the helium mass spectrometer leak detector. In the invention, the leakage detecting method for the sealing structure part, which can directly reflect the omission factor, is accurate to detect the leakage, simplifies the leakage detecting process and is convenient to use, is provided.

Description

technical field [0001] The invention relates to a leak detection method for sealing structural parts. Background technique [0002] There are usually many fluid passages inside the oil-cooled chassis, and the parts are sealed structures. The internal pressure of the parts of the sealed structure is required to withstand 25 kg. The parts are connected to each other with sealing rings to form an oil-cooled circulation system. It is required to ensure that there is no leakage to prevent the liquid filled in the cavity from leaking, and it is very important to detect the leak point. [0003] At present, the commonly used leak detection methods are bubble leak detection, water pressure leak detection and other methods. [0004] Bubble leak detection is generally suitable for smaller containers or pipes that can withstand a pressure of 5 at. The bubble leak detection method is to fill a certain pressure of leak-indicating gas into the tested part and put it in the liquid. The gas...

AI Technical Summary

Problems solved by technology

The third is the phenomenon that the bubbles are large, the formation rate is fast, and the duration is short. The leak rate range is about 10. -1 ~1Pa.m 3 the s -1

The disadvantage of this kind of hydraulic leak detection is that it cannot find whether the flow channel is unblocked or not.

[0007] For water pressure leak detection, the equipment is a manual pressure test pump, model SV-6, rated pressure 5MPa, rated flow rate 26ml / time; when in use, first fill the module with water, remove air, and then manually pressurize 25kg , keep the pressure and observe whether there is any leakage. Such a hose swells very badly, and it is easy to hurt people if the joint is disengaged. It is very inconvenient to use.

[0008] The current leak detection methods are very effective for parts pressure testing. If the parts constitute a circulation system, the latest leak detection must be carried out every time a part is moved. The leak detection method is cumbersome, and it is very troublesome for the overall leak detection of the oil-cooled chassis, because Oil and water cannot be mixed, and repeated cleaning is required, especially after the electronic assembly is completed, it is more difficult