1, ruler plug gauge method.
Measure the coaxiality error of the coupling with a ruler, and measure the parallelism error of the
1, ruler plug gauge method.
Measure the coaxiality error of the coupling with a ruler, and measure the parallelism error of the coupling with a plug gauge. This method is simple, but the error is large. Generally used for machines that do not require high speed and accuracy.
2, cylindrical, end face double table method.
Use two dial indicators to measure the values on the outer circle and end face of the coupling hub, calculate and analyze the measured values, determine the position of the two shafts in space, and finally get the adjustment amount and direction. This method is widely used. Its main disadvantage is that for machines with axial movement, the reading of end face measurement will produce errors when turning. Generally used for small and medium-sized machines with rolling bearings and small axial movement.
3, cylindrical, end face three table method.
This method uses two dial indicators on the end face, which are symmetrically arranged at the same distance from the axis to eliminate the influence of axial movement on the end face measurement reading. This method has high precision and is suitable for precision machine tools and high-speed machine tools that need accurate alignment. Such as steam turbine, centrifugal compressor, etc.
4. Cylindrical double table method.
Using two dial indicators to measure the excircle, the principle is to determine the relative position of the two shafts through two groups of excircle measurement readings at a certain interval, so as to know the adjustment amount and direction and achieve the purpose of centering. The disadvantage of this method is the complexity of calculation.
5, single table method.
This method only measures the outer circle reading of the hub, and does not need to measure the end face reading. This method has high alignment accuracy, which can be used not only for the alignment of machines with small hub diameter and large shaft end distance, but also for the alignment of large multi-shaft units (such as high-speed shafts and high-power centrifugal compressor units). This method can also eliminate the influence of axial movement on alignment accuracy.