CALCULATING THE SECURITY OF PUMP SHAFTS AGAINST PERMANENT DEFORMATION AND FATIGUE BY MEANS OF A COMPUTER

Apart from verifying the critical speed, pump shafts have been dimensioned mainly according to the torque occurring. For this, an admissible nominal shear stress is assumed, then the shaft is examined to ascertain whether this stress is exceeded at any point. Stress peaks due to notches, which influence the fatigue behavior of the shaft primarily, are taken into account implicitly by fixing the admissible nominal shear stress correspondingly low. But this method is inadequate for high-performance machines such as boiler feed pumps if cracks or excessive deformation are to be precluded with certainty. Consequently, a computer program allowing the stressing and elastic deformation of the shaft under the effects of torque, axial and radial loading to be calculated, and the security against permanent deformation and fatigue to be indicated.

• Corporate Authors:

  Sulzer Brothers Limited

  CH-8401
  Winterthur,   Switzerland 
• Authors:
  • Frei, A
• Publication Date: 1973

Media Info

• Features: References;
• Pagination: p. 19-27
• Serial:
  • Sulzer Technical Review
  • Volume: 55 N
  • Issue Number: 2
  • Publisher: Sulzer Brothers Limited

Subject/Index Terms

• TRT Terms: Boilers; Elastic deformation; Pumps; Shafts (Machinery); Stresses
• Old TRIS Terms: Boiler feed pumps; Shaft stresses
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00054024
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Res Note
• Files: TRIS
• Created Date: May 7 1974 12:00AM