Oil leakage rate detection method

Abstract

The invention discloses an oil leakage rate detection method, which comprises the following steps: inputting an instrument to be tested into a test room; setting environment conditions of the test room according to set environment parameters; when the standing time of the instrument to be tested in the test room obtained after set of the environment parameters reaches a preset standing time, carrying out sampling and mass spectrometry on the gas in the test room cavity through a quadrupole mass spectrometer to obtain sampling current output increment; and according to pre-measured standard current output increment and the sampling current output increment, calculating oil leakage rate of the instrument to be tested under the set environment parameters. The method realizes high-precision detection and calibration of overall oil leakage rate of static pressure liquid floatation inertial instruments.

Description

technical field [0001] The invention belongs to the technical field of instrument seal detection, and in particular relates to an oil leakage rate detection process method. Background technique [0002] As the core component of the inertial platform, the hydrostatic floating inertial instrument mainly includes a gyroscope and an accelerometer. The gyroscope provides a high-precision inertial reference for aircraft navigation, and the accelerometer measures the apparent acceleration along the inertial coordinate axis. The field of aviation vehicle navigation has a wide range of applications. [0003] Hydrostatic floating gyroscopes and accelerometer gyro components are filled with floating oil, and the oil is driven to float the float during operation. Due to the high precision requirements of the instrument, if the oil leaks, the external air will replace the air bubbles, which will affect the accuracy of the instrument. Therefore, the oil leakage rate is very important to ...

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Problems solved by technology

[0004] At present, the seal leak detection of static pressure liquid floating instruments mainly adopts the helium mass spectrometry leak detection method to detect leaks before the instrument is filled with oil. Since the instrument will also perform part of the sealing assembly operation after the test, the sealing state and the working state of the entire meter during the test There is a big difference, and the whole meter filled with oil is judged by weighing method to determine whether there is oil leakage. The weighing method has low detection accuracy and cannot detect the sealing failure of tiny leaks. The problem of oil leakage was discovered when the accuracy was significantly affected, which seriously restricted the qualification rate and production cycle of the instrument

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