Automatic detection method of ultrasonic phased array of turbine blade root
A technology of ultrasonic phased array and steam turbine blades, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices. It can solve problems such as time-consuming and affect work efficiency, and achieve The detection process is simple, the effect of improving economic benefits and simple operation
Active Publication Date: 2010-11-17
北京欧宁航宇检测技术有限公司
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Problems solved by technology
There are many methods for detecting blade roots, such as eddy current technology, magnetic particle technology, penetration technology and conventional ultrasonic technology, etc. However, using these technologies to detect blade roots requires first hanging the cylinder, and then removing the blades from the rotor one by one After the inspection is completed, the blades need to be installed on the rotor again, and the time for disassembling and assembling the blades is almost equal to the time for inspecting the blades, which consumes a lot of time and affects work efficiency
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[0023] see figure 1 and 2 , the present invention provides a steam turbine blade root ultrasonic phased array automatic detection method, including arranging the phased array probe on the outer arc side of the blade root to detect the inner arc side of the blade root 1, the phased array probe Set on the inner arc side of the blade root to detect the outer arc side of the blade root 2, install the phased array probe on the outer arc side platform on the air outlet side of the blade root to detect the inner arc side on the air outlet side of the blade root 3. Set the phased array probe on the outer arc side platform on the air inlet side of the blade root to detect the inner arc side on the air inlet side of the blade root 4. Set the phased array probe on the outer arc side of the air outlet side of the blade root The arc side platform detects the outer arc side 5 on the air outlet side of the blade root, and the outer arc side platform that arranges the phased array probe on t...
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The invention relates to an automatic detection method of an ultrasonic phased array of a turbine blade root, which comprises the following steps: arranging a phased array probe at the outer arc side of the blade root for detecting an inner arc side surface; arranging the phased array probe at the inner arc side of the blade root for detecting an outer arc side surface; arranging the phased array probe on the outer arc side platform at the gas outlet side of the blade root for detecting an inner arc side surface at the gas outlet side; arranging the phased array probe on the outer arc side platform at the gas inlet side of the blade root for detecting an inner arc side surface at the gas inlet side; arranging the phased array probe on the outer arc side platform at the gas outlet side of the blade root for detecting an outer arc side surface at the gas outlet side; and arranging the phased array probe on the outer arc side platform at the gas inlet side of the blade root for detecting an outer arc side surface at the gas inlet side. By adopting the method of the invention for detecting the blade root, the task can be finished without withdrawing a piston and removing blades; and the invention has the advantages of simple operation and precise interpretation of data, effectively shortens the idle time of equipment, and improves the economic benefit.
Description
technical field [0001] The invention relates to a method for detecting the root of a steam turbine blade, in particular to an automatic detection method of an ultrasonic phased array for the root of a steam turbine blade. Background technique [0002] The steam turbine is an essential operating equipment for power plants. Due to the centrifugal force generated by the high-speed rotating blades, the stress concentration is caused on the root of the blade. After a certain number of years of operation, the root of the blade is prone to form stress fatigue cracks, and the cracks are all generated on the surface of the root of the blade. . This crack is extremely harmful. When the crack expands to a certain extent, the blade is likely to fly off the factory and cause an accident. Therefore, the crack at the root of the blade has a major safety hazard. In response to this hidden danger, it is necessary to detect the blade root to ensure the safe operation of the steam turbine. T...
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Inventor 李志军
Owner 北京欧宁航宇检测技术有限公司