خوش آمدید

At this time, there is both radial displacement and angular displacement between the axis lines of the two shafts. 3.1, the choice of reference site Shaft misalignment It is very important to correct the axis position deviation of the coupling to determine the reference position, such as centrifugal horizontal pump unit, fan without speed increase and other equipment, the reference position should be the non-motor end; with speed increase, with coupling For large blowers, turbines, and steam turbines, the reference part should consider the cumulative error value formed by the motor end in the final adjustment process.

The part with long operation period, standard parts, and small deviation of the thermal expansion center line is regarded as the reference part. 2. What is the 'alignment' of the coupling? After the unit is installed or overhauled, by adjusting the height and left and right positions of the rotors, the axis of each rotor of the unit can form a continuous smooth curve without bending points during operation, that is, the axes of adjacent couplings of the rotors are concentric during operation, and the end faces Parallel, this adjustment process is called alignment. Analysis of shaft misalignment coupling deviation The axis space position of adjacent couplings has the following four states, as shown in Figure 1. The measurement record is shown in Figure 4. 5) Measurement and recording: When measuring, first measure the radial reading a1 and the axial reading s1 at 0° azimuth.

Double meter measurement method (one point measurement method) Two dial gauges are used to measure the deviation value of the outer circle and the end face of the coupling in the same direction, so it is also called the point measurement method, that is, while measuring the radial reading in a certain direction, the same direction is measured. Rotate the coupling halves to the point 2 position, and record the values ​​of a2, s2′, s2″; rotate the two halves Coupling to the point 3 position, record the values ​​of a3, s3', s3″; rotate the coupling halves to the point 4 position, record the values ​​of a4, s4', s4″; rotate the two coupling halves to Point 1 position, table 1, main meter, auxiliary meter in the fog level value a1=0, s1′=0, s1″=0, confirm the correctness of this group of measured values. At Wheel Bearing manufacturers this time, there is an inclined angular displacement between the axis lines of the two shafts (the inclination angle is α).3. The main disadvantage is that for couplings with axial movement, errors will occur in the axial degree of the end face when the rotor is tuing.

According to the division of the coupling points in Figure 2, adjust the table 1 and the main table to the position of point 1 and zero. When s1=s3, a1≠a3. To Figure 4 Dividing point measurement record of dial indicator Through the analysis and calculation of the measured values, the relative position of the two axes in space is determined, and then adjusted according to the calculation results. There are large distances in the middle and precision or high-speed running coupling equipment, such as steam turbines, blowers, Alignment of couplings such as turbines. The common cause is shaft movement or loose anchor bolts.