A temperature sensor-based in-situ non-destructive testing device for steam turbine blades

By designing a turbine blade inspection device that includes a sliding and counterweight mechanism, the problems of data deviation at the blade root and device drop were solved, achieving high-precision non-destructive testing and stable operation.

CN121762622BActive Publication Date: 2026-06-23HUANENG TONGCHUAN ZHAOJIN COAL POWER CO LTD +1
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Patent Information

Application Number
CN202610250370.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-03
Publication Date
2026-06-23
Estimated Expiration
2046-03-03

AI Technical Summary

Technical Problem

In existing technologies, when performing in-situ testing of turbine blades, mobile small robots have difficulty directly targeting the blade root to collect temperature signals, leading to deviations in the test data. Furthermore, the unstable center of gravity of the device can easily cause it to fall.

Method used

Design a non-destructive testing device for turbine blades based on temperature sensors. The device includes a body, a track, a detector, a sliding mechanism, and a heating mechanism. The heating mechanism is housed inside the body through the sliding mechanism to ensure the accuracy of temperature detection at the corner of the blade step. The device's center of gravity is stabilized by a counterweight mechanism.

Benefits of technology

It improves the accuracy of leaf root detection, reduces detection errors, prevents the device from falling off the leaf, and extends its service life.

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Abstract

The application provides a kind of turbine blade in-situ nondestructive testing device based on temperature sensor, including: machine body, a pair of caterpillar, detector, sliding mechanism and heating mechanism, a pair of caterpillar is located in the opposite sides of machine body, detector is located in the bottom of machine body, sliding mechanism is located in the front end of machine body in a retractable manner along the direction of travel of machine body, heating mechanism is located in the bottom of machine body and heating mechanism is connected to sliding mechanism, along the direction of travel of machine body, heating mechanism is located in front of detector, sliding mechanism has extended state and contracted state, when sliding mechanism is in extended state, part of sliding mechanism and heating mechanism are located outside of machine body, when sliding mechanism is in contracted state, sliding mechanism and heating mechanism are located inside of machine body. By setting sliding mechanism, heating mechanism can be stored inside of machine body, so that caterpillar can climb up the steps, so that the distance between detector at the rear end of machine body and blade step is closer, improve the detection accuracy of device.
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