Centrifugal compressor coupling alignment data measurement-Xitou Power

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Coupling alignment is a crucial process during the maintenance of centrifugal compressors, and it is also a relatively time-consuming step. Therefore, coupling finding is one of the essential skills for centrifugal compressor maintenance personnel. At present, the commonly used methods for aligning centrifugal compressors include double-meter measurement method and * * Measurement method. The double-meter measurement method is generally used in units where the axial displacement does not change much during the turning process. In order to ensure the accuracy of the measurement data, centrifugal compressors often use * * Calibrate using measurement method. Dial indicator * * The measurement method, as the name suggests, is to use three dial indicators at the same time for measurement and alignment. One dial indicator (Table 1) is fixed at the radial position of the coupling, and the other two dial indicators (Table 2 and Table 3) are fixed at the axial and diagonal positions of the coupling. The specific installation method is shown in Figure 1. Figure 1 Measurement steps: 1. The position in Figure 1 is recorded as the 0 degree position, mark the axial and radial positions of the coupling, and adjust the readings a1, b1, and c1 in Tables 1, 2, and 3 to x.0 (in order to ensure the accuracy of the measurement data, x is generally adjusted to 3 to 7) ； Figure 2 Figure 3 2. Rotate the two coupling halves in the direction of rotation of the compressor rotor and record data every 90 degrees. 1) Rotate to the 90-degree position as shown in Figure 2, and record the readings in Table 1, Table 2, and Table 3 as a2, b2, and c2 respectively. ； Figure 4 Figure 5 2) Rotate to the 180-degree position as shown in Figure 3, and record the readings in Table 1, Table 2, and Table 3 as a3, b3, and c3 respectively. ； Figure 6 Figure 7 3) Rotate to the 270-degree position as shown in Figure 4, and record the readings in Table 1, Table 2, and Table 3 as a4, b4, and c4 respectively. ； Figure 8 Figure 9 4) Rotate to the 0 degree position as shown in Figure 1, record the readings in Table 1, Table 2, and Table 3 as a5, b5, and c5 respectively. ； Figure 10 Figure 11 Data verification: 1.a1=a5, (b1-c1)=(b5-c5) ； 2. (b1+b3+c2+c4) = (b2+b4+c1+c3) If the above equation is true, it means that the data measurement is accurate, and the error range is generally controlled at 0.01mm, otherwise it needs to be measured again.