Method for detecting defects at shaft neck root or unloading slot part of belt conveyor drum shaft
A technology of belt conveyor and unloading trough, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve problems such as complex shapes and achieve the effect of timely maintenance and treatment
Active Publication Date: 2013-05-01
CHINA SHENHUA ENERGY CO LTD
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Problems solved by technology
[0002] Belt conveyors are often used in the production of coal mines. The journal root or unloading groove of the roller shaft in the belt conveyor is an important part, wherein, because the journal root or unloading groove of the roller shaft Therefore, in the current ultrasonic testing method, there is no specific testing method for the root of the journal or the unloading groove of the roller shaft of the belt conveyor.
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[0014] Such as figure 1 , 2 As shown, in a specific embodiment of the present invention, the flaw detection method for the root of the journal or the unloading groove of the roller shaft of the belt conveyor includes the following steps:
[0015] In step 201, an ultrasonic probe is used to scan for artificial cracks on the test block. In a preferred embodiment, machine oil is used as a coupling agent, and artificial cracks with a depth of 1.0 mm on the outer side of the bearing seat insert are scanned from the shaft end face of the ultrasonic probe SD-01 module.
[0016] Step 202, using the primary reflection wave obtained by scanning the artificial cracks on the test block to calculate the flaw detection sensitivity. Adjust the relevant parameters of the ultrasonic scanner so that the height of the primary reflected wave of the artificial crack reaches 80% of the vertical full width of the fluorescent screen, and compensate 6dB-10dB on this basis, which is used as the flaw ...
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The invention provides a method for detecting defects at a shaft neck root or unloading slot of a belt conveyor drum shaft, wherein the method comprises the following steps: scanning artificial cracks on a test block by utilizing an ultrasound probe; calculating the defect detection sensitivity by utilizing the primary reflection wave obtained through scanning the artificial cracks on the test block; scanning a shaft neck root or an outer side of an unloading slot by utilizing the ultrasound probe, wherein during the scanning, the probe is pointed to a centre hole, and moved to and fro in a stepping manner at a predetermined speed, simultaneously, the probe rotates within a predetermined angle range; and judging whether the shaft neck root or the unloading slot part has defects or not. Compared with the prior art, the method provided by the invention has the advantages that the defect detection for the shaft neck root or unloading slot part of the whole belt conveyor drum shaft can befinished fast; and once the defects at the shaft neck root or unloading slot part of the conveyor drum shaft are discovered, repairing and processing can be performed in time.
Description
technical field [0001] The invention relates to a flaw detection method for the root of the journal or the unloading groove of the roller shaft of a belt conveyor. Background technique [0002] Belt conveyors are often used in the production of coal mines. The journal root or unloading groove of the roller shaft in the belt conveyor is an important part, wherein, because the journal root or unloading groove of the roller shaft The shape of the part is relatively complicated. Therefore, in the current ultrasonic flaw detection method, there is no flaw detection method for the root of the journal or the unloading groove of the belt conveyor roller shaft. Contents of the invention [0003] Aiming at the defects of the prior art, the object of the present invention is to provide a flaw detection method, which can conveniently detect the journal root or the unloading groove of the roller shaft of the belt conveyor. [0004] The invention provides a flaw detection method for th...
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IPC IPC(8): G01N29/04
Inventor 杨成龙周俊丽王波浪王波张波郝旺马海兵王超
Owner CHINA SHENHUA ENERGY CO LTD