An intermediary bearing vibration signal collection method

Abstract

The invention relates to a method for collecting vibration signals of an intermediate bearing, belonging to the technical field of detection, and relates to a method for collecting vibration signals of an intermediate bearing. In this method, the acceleration sensor is used to collect the vibration signal of the intermediate bearing and the special sensor installation retaining ring, which is composed of two left and right half retaining rings with completely symmetrical structure; the acceleration sensor is installed on the sensor installation retaining ring to reduce the The effect of small sensor installation on the unbalance of the rotor shaft. The acquisition method is to first determine the structure size of the sensor installation retaining ring, then install the acceleration sensor, and finally, collect the vibration signal of the intermediate bearing. The invention improves the installation method of the acceleration sensor, the method can accurately collect the vibration signal of the intermediate bearing, improve the signal-to-noise ratio of the signal, provide data for the fault diagnosis and state monitoring of the intermediate bearing, and bring great benefits to the subsequent monitoring and diagnosis work. convenient.

Description

technical field [0001] The invention belongs to the technical field of detection and relates to a method for collecting vibration signals of an intermediate bearing. Background technique [0002] Intermediate bearings are widely used in various mechanical equipment, such as the dual-rotor test bench of aero-engines, which use intermediate bearings for support. The performance of the intermediate bearing directly affects the working status of the entire equipment, so it is necessary to monitor its status and diagnose existing faults in time, which depends on accurate signal collection. In November 2013, Liao Mingfu and others pointed out in the "Fault Characteristics and Diagnosis Methods of Aeroengine Intermediate Bearings" in the Journal of Aerodynamics, periodical number 11-2297 / V: At present, the acquisition of vibration signals of intermediate bearings uses The vibration of the force casing, the fault characteristic information of the intermediate bearing is analyzed fr...

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Problems solved by technology

[0003] The aero-engine double-rotor test bench adopts the support method of intermediate bearings. The intermediate bearings are used to connect the high and low pressure rotor shafts. The outer ring and inner ring rotate synchronously with the high and low pressure rotor shafts respectively. , the signal-to-noise ratio of the fault signal of the intermediate bearing is extremely low, and it is not easy to install the sensor directly on the outer ring of the intermediate bearing, which brings great difficulties to the follow-up diagnosis work. Therefore, it is urgent to propose a method that can directly collect the vibration signal of the intermediate bearing. method

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