nike shox Analysis of Factors Influencing the axia

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Analysis of Factors Influencing the axial displacement

Machine flow surface changes and seal the gap increases the axial displacement caused by a persistent anomaly. Table 1 dial indicator gauges (mm) Front Output (VDC) up down up down bar:; a coral sill 1111111111 ~ ~ one by one small crisis in the na-chuan. Lo ~ burning a month is a strider O5O55050 a ten + E} Ye Qian, a 48 * a 7 Automation of Electric Power Systems 2002 No. 6 Table 2 dial indicator gauges (mm) Front Output (VDC) increased rise and fall of a drop of 1.5 to 1.5 of a 1.5-3.96-3.96-1.0-1-1-5.93-5.92-0.5-0.5-0. 5-7.96-7.96000-9.96-9.960.50.50.5-12. O2.12. O21.011. O2-14. O8-14. O81.51.51.5-16.08-16. O7222-18. O4-18. O4 Note: The alarm indicator is 1.5mm. When the overhaul is nearing completion, the axial displacement field verification. January 2001 3El, push the shaft turbine end of the work, set the machine zero position, the axial displacement device is installed and verify the data meet the requirements. January 12El noon, # 4 unit is switched on, the axial displacement is about 0.38mm. January 15El, systems failure due to gas oil, to be transferred from the previous box. Before lifting the loose screw, axial displacement of instructions for the 0.85mm, the output voltage to correspond with the instruction sheet. The inspection from the oil found at the mirror mounting bracket loose. Because of high cylinder temperature, less than zero rotor push, push the shaft does not have the condition. PM 2: o0, with 2OMw turbine load, axial displacement indicates 0.65mm; 1 月 17El measured values for the morning of 0.96mm. The two output voltage to the corresponding instruction sheet. Depending on the operating personnel, overhaul before the outage to run after the value has increased more than about 0.3mm. # 4 units from the practical point of view, is the abnormal increase of the axial displacement occurs after the overhaul, you can rule out the partition seal the gap increases and the rotor blade for wear reasons for scaling; by running Richard El blog may occur axial displacement was abnormal, there was no water hammer, steam temperature, steam pressure, vacuum down, there is no overload operation. Unit # 4 Therefore,[link widoczny dla zalogowanych], not due to abnormal axial displacement causes run; it from the measurement system view, as the measurement of rotor overhaul not too much of the material surface for processing and size changes, so should not be measured by the deviation was caused by measuring the body; the sensor system, the probe, extension cable,[link widoczny dla zalogowanych], etc. are in use pre-original, and the demolition carried out before and after calibration and found no abnormalities, there is no change in the electronic properties of the problem; If the failure is maintenance with the produce, then cover the tank before the first start, it should appear that the failure is not the case, but in the oil system overhaul, when the second generation before the tank lid, and increase the value of relative stability, it can be inferred roughly the fault lies in the oil system maintenance process, the location of the former case the overall occurrence of moving forward,[link widoczny dla zalogowanych], so reflected in the measurement system, that is, before lifting the loose screws, axial displacement indicates 0.85mm, re-covered cylinder, due to the role of the screw tightening force, the former case there is a little set back, but did not return to the original position, so turn the unit again when the numerical ratio of the axial displacement increased before the outage. Unit # 4 has not been arranged due overhaul, so the problem is persistent. The above reasoning is correct, to be continue to gather information, such as to demonstrate the next overhaul. 5 Conclusion From the above two examples we can see the actual situation of ever-changing field, resulting in the phenomenon of measurement error is often caused by a variety of reasons. If you always focus on the measurement system only to find a cause, is bound to come to dead end. Only by understanding the interaction between the role of various factors, learning other expertise, such as running professional, such as turbine overhaul the system of professional theory, as much as possible to collect information, will analyze the transverse and longitudinal object than to draw the right conclusions. 6 References 1 Shanxi Electric Power Industry. Power centralized control run (senior workers). Beijing: China Electric Power Press, 1997,[link widoczny dla zalogowanych], (169): 70 ~ 712 Fenghui Wen, ZHANG Guo. Turbine curriculum references. Beijing: China Water Power Press, 1991, (26) 3 Ministry of Water Resources. Thermal instrumentation and control equipment maintenance operating procedures. Beijing: China Water Power Press, 1987:67 ~ 694 Shanxi Electric Power Industry. Turbine equipment operation techniques. Beijing: China Water Power Press,[link widoczny dla zalogowanych], 1985:311 ~ 313
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