A method for detecting oil leakage rate

Abstract

The invention discloses a process method for detecting oil leakage rate, which comprises: putting the meter to be tested into a test chamber; setting the environmental conditions of the test room according to the set environmental parameters; testing the meter to be tested after setting the environmental parameters After the resting time in the chamber reaches the preset resting time, a quadrupole mass spectrometer is used to sample and analyze the gas in the cavity of the test chamber to obtain the sampling current output increment; according to the standard current output increment and The output increment of the sampling current is calculated to obtain the oil leakage rate of the instrument under test under the set environmental parameters. The invention realizes the high-precision detection and calibration of the oil leakage rate of the whole meter of the static pressure liquid floating type inertial instrument.

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 ...

AI Technical Summary

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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