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Sensor for monitoring temperature/strain signals of bearings

A strain sensor and signal monitoring technology, applied in mechanical bearing testing, instruments, measuring devices, etc., can solve the problems of poor bearing working conditions, narrow space, and inability to monitor the working state of the aircraft in real time, so as to increase the overall weight, volume, and structure The effect of simplicity and broad application prospects

Active Publication Date: 2019-02-15
CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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AI Technical Summary

Problems solved by technology

[0005] Due to the poor working conditions of the bearings and the narrow space, traditional electromechanical or electronic sensors are no longer able to monitor the working status of the aircraft in real time

Method used

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  • Sensor for monitoring temperature/strain signals of bearings

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Embodiment Construction

[0022] like figure 1 As shown, this embodiment takes a deep groove ball shaft for aviation as an example, and the steps of forming a temperature / strain signal monitoring sensor on the deep groove ball shaft using the technical solution of the present invention are as follows:

[0023] Step 1. Use the ion implantation method to inject aluminum elements on the end face 1 of the bearing outer ring made of M50, so that the end face 1 of the outer ring and the insulating layer 5 can make a smooth transition, and then use the reactive magnetron sputtering method to plate Al 2 o 3 / AlN multilayer insulating layer 5, the thickness of which is 10 μm, and the resistance value is greater than 1 MΩ;

[0024] Step 2: Plating a plurality of nickel-silicon strain-sensitive layers 2 on the surface of the insulating layer 5 along the circumference of the end face 1 of the outer ring, with a thickness of 150 nm, and then plating a corresponding number of nickel-chromium temperature-sensitive ...

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Abstract

The invention relates to a sensor for monitoring temperature / strain signals of bearings. The sensor is formed by preparing a strain sensitive layer (2) and a temperature sensitive layer (3) on an outer-ring end face (1) of a bearing. One end of the strain sensitive layer (2) and one end of the temperature sensitive layer (3) are overlapped with each other. The strain sensitive layer (2), the temperature sensitive layer (3) and the overlap surface of the strain sensitive layer (2) and the temperature sensitive layer (3) are insulated from the outer-ring end face (1) of the bearing. The resistance value of the strain sensitive layer (2) can change with strain so as to form a strain sensor. The voltage value of the overlap surface of the strain sensitive layer (2) and the temperature sensitive layer (3) can change with temperature so as to form a thermocouple temperature sensor. Signals are led out by leads (4) at the other end of the strain sensitive layer (2) and at the other end of thetemperature sensitive layer (3). A thin film sensor of a composite structure is realized, which can simultaneously detect the temperature and strain parameters of bearings.

Description

technical field [0001] The invention relates to a sensor for monitoring bearing temperature / strain signals, belonging to the technical field of thin film sensors. Background technique [0002] As a key part of supporting rotating parts, bearings are indispensable for aircraft mechanical systems. The service conditions of the bearing are complex, the running speed is fast, the lubrication conditions are complex, and it must withstand the harsh environment such as frictional heat and vibration. The failure probability is relatively greater, and the failure phenomenon and behavior are more complicated. Once the bearing fails, it often brings serious consequences such as parking, motor power supply failure, and hydraulic system failure. It is an important source of many flight accidents and symptoms. In some cases, bearing failure can even lead to aircraft crashes and fatalities. In recent years, a large number of new aircraft have appeared, which put forward higher requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G01M13/04
CPCG01D21/02G01M13/04
Inventor 李星亮徐昌语郭蒙荀尚伟张彬
Owner CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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