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Running State Detection of Coal Mill Reducer in a Cement Plant

2019-09-17
<p><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;"></span></p><p>1. Background introduction</p><p>The coal mill reducer of a cement plant has abnormal noise. At the invitation of the plant equipment department, the technical service engineer of our company collects the vibration data of the coal mill reducer on the spot.</p><p>2. Measuring Instruments</p><p>Data collector: SKF data acquisition analyzer CMXA 70.</p><p>Analysis software: SKF@ptitude Analyst</p><p>3. Equipment parameters</p><p>Known: reducer input shaft speed: 991r/min; output shaft speed: 110r/min.</p><p>Unknown: the number of teeth of each gear, intermediate speed.</p><p>Fault phenomena: The vibration inside the gearbox is large and there is abnormal noise.</p><p>4. Layout of measuring points and direction of measurement</p><p><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;"></span><br/></p><p><img src="http://web.zhengda.win8.wantsun.com.cn:888/ueUpload/20190917/1568702734102135.jpg" title="1568702734102135.jpg"/></p><p><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;">5. Photographs of Gearbox on Site</span></p><p><img src="http://web.zhengda.win8.wantsun.com.cn:888/ueUpload/20190917/1568702734110204.jpg" title="1568702734110204.jpg"/></p><p><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;">6. One of the detection spectra</span></p><p><img src="http://web.zhengda.win8.wantsun.com.cn:888/ueUpload/20190917/1568702734131952.jpg" title="1568702734131952.jpg"/></p><p>7. analysis</p><p>The bearing 4 (22340CC) has the defect frequency of the rolling element, and the surface of the rolling element may be peeled off. Other bearings did not show any obvious failure.</p><p>8. Verification of test results</p><p><img src="http://web.zhengda.win8.wantsun.com.cn:888/ueUpload/20190917/1568702734138088.jpg" title="1568702734138088.jpg"/></p><p><br/></p><p><br/></p>
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