Non-contact ultrasound-based method for measuring fitting area of large-scale high-speed rotary equipment

Abstract

The invention provides a non-contact ultrasound-based method for measuring fitting area of large-scale high-speed rotary equipment. The method comprises the following steps of: enabling pulse laser emitted by a laser to irradiate on the upper surface of a first rotor part through a spectroscope and a first lens; enabling a photoelectric detector to receive the pulse laser from the spectroscope; enabling a confocal Fabry-Perot interferometer to be capable of receiving an ultrasonic signal of the upper surface of the first rotor part; converting an electric signal transmitted by the photoelectric detector and the ultrasonic signal transmitted by the confocal Fabry-Perot interferometer into digital signals by means of a data acquisition card, and transmitting the digital signals to an industrial personal computer for storage and data processing; and acquiring the fitting area of the first rotor part and the second rotor part at the current detection position by using a corresponding relation between the amplitude Ai and the fitting area Si. According to the non-contact ultrasound-based method, non-contact nondestructive measurement of the fitting area of the large-scale high-speed rotary equipment is realized, excitation and receiving of laser ultrasound are both completed instantly, rapid and real-time measurement can be realized, and the method has relatively high anti-interference capability.

Description

technical field [0001] The invention relates to a method for measuring the bonding area of ​​large-scale high-speed rotary equipment based on non-contact ultrasound, and belongs to the field of measurement technology. Background technique [0002] Large-scale high-speed rotary equipment such as aero-engines or gas turbines has become a bottleneck problem in the field of high-end equipment manufacturing in my country due to the characteristics of complex technology and difficult development, coupled with the technical blockade of Europe and the United States. Aeroengine or gas turbine systems are generally assembled by multi-stage rotors, and the contact surfaces between the rotors are called joint surfaces. These microscopically rough interfaces make the system no longer continuous. The mechanical properties of an aero-engine or gas turbine system are not only related to the rotor parts themselves, but also related to the connection properties between the rotors. The existe...

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Problems solved by technology

[0004] The present invention proposes a method for measuring the bonding area of ​​large-scale high-speed rotary equipment based on non-contact ultrasound, the purpose of which is to solve the problem that the bonding area of ​​large-scale high-speed rotary equipment is difficult to measure directly, the traditional ultrasonic method has low measurement efficiency and will cause corrosion on the surface of the measured piece To achieve direct, high-efficiency and high-precision measurement of the bonding area of ​​large-scale high-speed rotary equipment

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