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Hollow blade wall thickness parameter measuring device

A technology of parameter measurement and hollow blade, which is applied in the direction of electromagnetic measuring device, electric/magnetic thickness measurement, etc., can solve the problems of measurement accuracy influence, probe diameter and anti-interference ability can not meet the requirements of field use, etc., to achieve small diameter, diameter Reasonable and well-designed effects

Inactive Publication Date: 2015-07-29
HARBIN DONGAN ENGINE GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, when measuring at the production site, interference factors such as environmental electromagnetic interference and ambient temperature have a greater impact, which will also affect the accuracy of measurement
The probe diameter and anti-interference ability of the current wall thickness measuring device cannot meet the requirements of field use

Method used

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  • Hollow blade wall thickness parameter measuring device
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Embodiment Construction

[0009] As shown in the figure, the specific technical solution of the present invention is that the hollow blade wall thickness parameter measurement device includes a data acquisition structure and a measurement device controller 10, and the data acquisition structure includes a measurement handle 4 and an eddy current set on the measurement handle 4 Sensor 2, temperature sensor 3, measurement record button 5, connection plug 7, the I / O port of described eddy current sensor 2, temperature sensor 3, measurement record button 5 is connected to measurement device controller 10 through connection plug 7, so The measuring device controller 10 described above comprises a sequentially connected constant current source excitation circuit, a preamplifier circuit, a narrowband bandpass filter circuit, a true effective value conversion circuit, data processing and a compensation circuit, and the constant current source excitation circuit includes an amplifier, an inductor L , input resis...

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Abstract

The invention relates to a hollow blade wall thickness parameter measuring device. The hollow blade wall thickness parameter measuring device comprises a data collecting structure and a measuring device controller. The measuring device controller is composed of a constant current source exciting circuit, a pre-amplification circuit, a narrow-band bandpass filter circuit, a true virtual value converting circuit and a data processing and compensating circuit which are sequentially connected. A feedback resistor, an inductor and an exciting coil are sequentially connected between the negative access unit and the 6 pin of the amplifier of the constant current exciting circuit; the 4 pin of the amplifier is connected with a -15 V power source and a first capacitor, the 7 pin of the amplifier is connected with a 15 V power source and a second capacitor, and the first capacitor an the second capacitor are the same in parameters, and one ends of the first capacitor and the second capacitor are grounded. Under the action of the a feedback proportional amplifying circuit, the hollow blade wall thickness parameter measuring device can avoid distortion due to influence of environmental temperature and electromagnetic interference; meanwhile, a measuring probe is reasonable in diameter design and accordingly small in diameter. Therefore, the hollow blade wall thickness parameter measuring device can achieve field measurement of the wall thickness of a hollow blade, of which the curvatures of the convex surface and the concave surface of the outer contour are relatively large.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for hollow blade wall thickness parameters. Background technique [0002] The wall thickness parameter of the hollow blade of the aero-engine is a very important parameter in the quality control of the blade, which is directly related to the strength and safety of the blade. It is required to inspect and sort each blade at the production line site. Due to the complex structure of the engine blade, the curvature of the convex surface and the concave surface of the outer contour are relatively large, and the wall thickness parameters of different positions of the hollow blade are different. The curvature of the inner and outer contours of the blade is relatively large, and the point measurement requires that the diameter of the probe should be very small, not exceeding Φ3mm, otherwise the measurement is the average thickness of a probe coverage, and the error will be relativ...

Claims

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Application Information

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IPC IPC(8): G01B7/06
Inventor 张世林王德辉雷云莲闫东松孙艳玲
Owner HARBIN DONGAN ENGINE GRP
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