【Weekly Topic】10-12-13 What are the factors that affect the accuracy of equipment installation?

This post was last edited by terephthalic on 2010-12-13 08:56. Let me start by offering some initial thoughts: Factors that affect the precision of equipment installation 1. The welding accuracy of the equipment’s supports and lifting lugs 2. The precision and errors of the alignment and leveling instruments 3. Human factors related to operation skills 4. Natural factors

Improper manufacturing or installation, failure to account for design changes, deformation during transportation, errors exceeding acceptable limits

Factors that affect the precision of equipment installation include: 1. The construction quality (precision) of the foundation: this includes the geometric dimensions of the foundation, its position, the elevation levels in different planes, as well as the flatness of the upper surface and the deviation from being parallel to the horizontal plane； The strength, stiffness, settlement, inclination, and seismic performance of the foundation, etc. 2. Installation quality (precision) of shims and foot bolts: This includes the quality of the shims themselves, the quality of their contact with the surface, the perpendicularity of the foot bolts to the horizontal plane, the quality of the secondary grouting, the degree to which the shims are compressed, and the tightening torque of the foot bolts. 3. The selection of the equipment’s measurement reference is directly related to the final quality of the equipment’s installation, alignment, and leveling. During installation, the measurement reference is usually chosen on the machined surfaces of the equipment base, frame, housing, pedestal, bed, tabletop, base plate, etc. 4. Assembly accuracy of bulk equipment: This includes the relative motion accuracy between various moving parts, as well as the fit accuracy and contact quality between the mating surfaces; these assembly accuracies directly affect the operational quality of the equipment. 5. The accuracy requirements of the measuring device must be compatible with those of the device being measured; otherwise, the quality requirements cannot be met. 6. Influence of internal stresses in the equipment: The internal stresses generated during the manufacturing and installation of the equipment can cause deformation, thereby affecting the accuracy of its installation. Therefore, technical measures should be taken to prevent the formation of internal stresses during these processes. 7. Temperature changes have a significant impact on the equipment foundation and the equipment itself (including the foundation, the equipment, and the measuring devices), especially in the case of large-scale, precision equipment. 8. Operator’s skill level and errors resulting from operation ； Operational errors are inevitable; the key is to keep them within acceptable limits. There are two issues here: the operator’s skill level and responsibility. How to control installation accuracy well: 1. Try to eliminate and avoid various factors that affect installation accuracy. 2. Appropriate and reasonable assembly and adjustment methods should be selected based on the design precision and structural characteristics of the equipment. 3. Select appropriate testing methods, including detectors and measurement techniques, whose accuracy level should be suitable for the accuracy requirements of the equipment being tested. 4. Use the repair method when necessary. 5. Determine the deviation and its direction reasonably.

Reply 1# ms3210 1. Basic construction quality (precision): includes the geometric dimensions of the foundation, its position, the elevation levels in different planes, the flatness of the upper surface, and the deviation from horizontality； The strength, stiffness, settlement, inclination, and seismic performance of the foundation, etc. 2. Installation quality (precision) of shims and foot bolts: This includes the quality of the shims themselves, the quality of their contact with the surface, the perpendicularity of the foot bolts to the horizontal plane, the quality of the secondary grouting, the degree to which the shims are compressed, and the tightening torque of the foot bolts. 3. The selection of the equipment’s measurement reference is directly related to the final quality of the equipment’s installation, alignment, and leveling. During installation, the measurement reference is usually chosen on the machined surfaces of the equipment base, frame, housing, pedestal, bed, tabletop, base plate, etc. 4. Assembly accuracy of bulk equipment: This includes the relative motion accuracy between various moving parts, as well as the fit accuracy and contact quality between the mating surfaces; these assembly accuracies directly affect the operational quality of the equipment. 5. The accuracy requirements of the measuring device must be compatible with those of the device being measured; otherwise, the quality requirements cannot be met. 6. Influence of internal stresses in the equipment: The internal stresses generated during the manufacturing and installation of the equipment can cause deformation, thereby affecting the accuracy of its installation. Therefore, technical measures should be taken to prevent the formation of internal stresses during these processes. 7. Temperature changes have a significant impact on the equipment foundation and the equipment itself (including the foundation, the equipment, and the measuring devices), especially in the case of large-scale, precision equipment. 8. Operator’s skill level and errors resulting from operation ； Operational errors are inevitable; the key is to keep them within acceptable limits. There are two issues here: the operator’s skill level and responsibility.

1. Construction quality (precision) of the foundation: includes the geometric dimensions of the foundation’s shape, its position, the elevations at different levels, the flatness of the upper surface, and the deviation from being parallel to the horizontal plane； The strength, stiffness, settlement, inclination, and seismic performance of the foundation, etc. 2. Installation quality (precision) of shims and foot bolts: This includes the quality of the shims themselves, the quality of their contact with the surface, the perpendicularity of the foot bolts to the horizontal plane, the quality of the secondary grouting, the degree to which the shims are compressed, and the tightening torque of the foot bolts. 3. The selection of the equipment’s measurement reference is directly related to the final quality of the equipment’s installation, alignment, and leveling. During installation, the measurement reference is usually chosen on the machined surfaces of the equipment base, frame, housing, pedestal, bed, tabletop, base plate, etc. 4. Assembly accuracy of bulk equipment: This includes the relative motion accuracy between various moving parts, as well as the fit accuracy and contact quality between the mating surfaces; these assembly accuracies directly affect the operational quality of the equipment. 5. The accuracy requirements of the measuring device must be compatible with those of the device being measured; otherwise, the quality requirements cannot be met. 6. Influence of internal stresses in the equipment: The internal stresses generated during the manufacturing and installation of the equipment can cause deformation, thereby affecting the accuracy of its installation. Therefore, technical measures should be taken to prevent the formation of internal stresses during these processes. 7. Temperature changes have a significant impact on the equipment foundation and the equipment itself (including the foundation, the equipment, and the measuring devices), especially in the case of large-scale, precision equipment. 8. Operator’s skill level and errors resulting from operation ； Operational errors are inevitable; the key is to keep them within acceptable limits. There are two issues here: the operator’s skill level and responsibility.

1. Subjective factors: human causes. 2. Construction quality (precision) of the foundation: includes the geometric dimensions of the foundation’s shape, its position, the elevations at different levels, the flatness of the upper surface, and the deviation from parallelism to the horizontal plane ； The strength, stiffness, settlement, inclination, and seismic performance of the foundation, etc. 3. Installation quality (precision) of shims and foundation bolts: This includes the quality of the shims themselves, the quality of their contact with the surface, the perpendicularity of the foundation bolts to the horizontal plane, the quality of the secondary grouting, the degree to which the shims are compressed, and the tightening torque of the foundation bolts. 4. The selection of the measurement reference is directly related to the final quality of equipment installation, alignment, and leveling. During installation, the measurement reference is usually chosen on the machined surfaces of the equipment base, frame, housing, pedestal, bed, tabletop, base plate, etc.

Reply 1# ms3210 1) Understand the basic regulations, general principles, and installation quality requirements for mechanical and electrical equipment installation； 2) Master the basic principles of engineering surveying, as well as the principles and usage methods of common surveying instruments ； 3) Master the layout methods, basic design, and construction methods for mechanical and electrical equipment ； 4) Have a thorough understanding of the structural features and installation methods of typical machine components ； 5) Understand the working principle of typical equipment and master its installation methods ； 6) Understand common faults during installation, as well as the methods for diagnosing and resolving them, and be able to fix simple faults that arise during installation ； 7) Able to design construction organization plans for various sub-projects related to common mechanical and electrical equipment, and participate in on-site installation work as well as construction organization management ； 8) Be familiar with the design concepts of the drawings and integrate them with the actual conditions on site. 9) Equipment maintenance must be taken into consideration during installation. 10) It is essential to consider the specific conditions of the operating environment or the materials before installation. 11) Workers are required to carry out construction with strictness, precision, and accuracy.

1. Heavy equipment and equipment that generates significant vibration should be placed on the ground, with independent foundations provided for them； 2. The towers and containers pumped by the pump, as well as equipment for vacuum operation, gravity flow, solid discharge, etc., should be arranged at appropriate heights in accordance with the requirements of the process flow ； 3. When the area available for the device is limited or it is more cost-effective, the equipment can be installed on a frame.

1. Equipment foundation. 2. Shims and secondary grouting. The shims should make good contact with the equipment; no more than 5 shims per set should be used. The shims need to be pressed firmly together, and they should be fixed in place using spot welding. 3. Foot bolts. 4. Detection methods and measuring tools. 5. Stress and deformation. 6. Operation.

1) Construction quality (precision) of the foundation； Including the basic geometric dimensions of shape, position, elevations on different planes, the flatness of the upper plane, and the deviation from parallelism to the horizontal plane ； The strength, stiffness, settlement, inclination, and seismic performance of the foundation, etc. (2) Installation quality (precision) of shims and foot bolts: This includes the quality of the shims themselves, the quality of their contact with the surface, the perpendicularity of the foot bolts to the horizontal plane, the quality of the secondary grouting, the degree to which the shims are compressed, and the tightening torque of the foot bolts. (3) The selection of the equipment measurement reference is directly related to the final quality of the installation, alignment, and leveling of the entire equipment. During installation, the measurement reference is usually chosen on the machined surfaces of the equipment base, frame, housing, pedestal, bed, tabletop, base plate, etc. (4) Assembly accuracy of bulk equipment: This includes the relative motion accuracy between various moving parts, as well as the fit accuracy and contact quality between the mating surfaces; these assembly accuracies directly affect the operating quality of the equipment. (5) The accuracy of the measuring device must be compatible with the accuracy requirements of the device being measured; otherwise, the quality requirements cannot be met. (6) Effect of internal stresses in the equipment: The internal stresses generated during the manufacturing and installation of the equipment can cause deformation, thereby affecting the installation accuracy of the equipment. Therefore, technical measures should be taken during equipment manufacturing and installation to prevent internal stress in the equipment. (7) Temperature changes have a significant impact on the equipment foundation and the equipment itself (including the foundation, the equipment, and the measuring devices), especially in the case of large-scale, precision equipment. (8) Operator’s skill level and errors resulting from operation: Operational errors are inevitable; the key is to keep such errors within acceptable limits. Here, there are two issues: the operator’s skill level and sense of responsibility. Come to learn*