I have a question regarding the alignment of the pump set; thank you
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It is mentioned in sh3538 and SH3541: \"Initial leveling and alignment should be carried out before each grouting\"； Final leveling and alignment are carried out before the secondary grouting.” So alignment here shouldn’t be leveling; then what tasks should be carried out? What is the difference between this and the term “axis alignment” mentioned later? I hope experts can offer their guidance. Thank you!
The alignment mentioned here should refer to the positioning of the equipment, while shaft alignment denotes the degree of concentricity between the motor shaft and the pump shaft
One grouting operation refers to the grouting of the bolt holes reserved around the foundation bolts, after the pump unit has been positioned and leveled by adjusting the shims and flat shims to set the horizontal level of the equipment foundation. Secondary grouting refers to the grouting carried out below the pump base, after adjusting the level using a level, tightening the foot bolts, and spot-welding the shims (taking into account the thermal expansion during welding, though this is generally not a problem). Axis alignment refers to the concentricity of the equipment itself, namely the motor; this is generally adjusted by modifying the height and position of the motor.
Assume that for some reason the pump body is not properly aligned with the motor; in such a case, using the pump outlet flange (which is usually used to determine levelness) to level the pump base and carry out two grouting operations – will this cause any difficulties in aligning the shaft later on? Or will it never be found at all?
Generally, it won’t. If the shafts are not aligned, the pump generally won’t move; adjust the motor to align the shafts. For some reason, the pump body is not properly aligned with the motor; this issue occurs in new equipment when there is a large error in the manufacturing process regarding the alignment of the base – an occurrence that happens with almost zero probability. ). Because the overall equipment has basically been aligned by the manufacturer. No significant errors will occur.
Leveling is to adjust the levelness of the equipment, while alignment is to align the axes of the equipment.
This brings us back to my topic.
It’s likely that the two devices are not on the same base; initial alignment is required before grouting each time. Such as large-scale units
The initial leveling is done using a mechanic’s level to achieve a rough levelness, while the final leveling is accomplished with an optical interferometer or a frame level. For the initial alignment, tools such as saw blades are used to get the levelness within 1 or 2 mm; the final alignment is carried out using a dial indicator.
It should refer to the positioning of the equipment, including elevation, centerline, and other such parameters, as well as the levelness of the equipment and the positional relationship between devices, such as their concentricity
Alignment involves aligning the equipment center with the foundation center and adjusting the elevation to the specified level. Leveling ensures that the equipment is horizontal, meeting the requirements specified in the standards or by the manufacturer. Shaft alignment refers to keeping the deviation between the pump shaft and the motor shaft within acceptable limits.