Centrifugal Pumps Design and Application 2nd ed - Val S. Lobanoff, Robert R. Ross (Butterworth-Heinemann, 1992)
Rolling Element Bearings and Lubrications 553 Figure 20-20. A small expansion chamber accommodates vapor expansion and contraction in hermetically sealed bearing housings (courtesy of Gits Manufacturing Company, Bedford Park, Illinois). Figure 20-21. Bearing housing for so-called upgraded medium duty (UMD) pump marketed in the U.S. since 1985 (courtesy of Carver Pump Company, Muscatine, Iowa). is immersed to the proper working depth, turns at the proper speed, and is surrounded by lube oil of the proper viscosity. This is graphically illustrated in Figure 20-23, which is derived from Heshmat and Pinkus [9]. In this context, fully effective would mean that the oil ring should deliver a sufficient amount of oil even as the shaft speed increases. This is achieved by the ring provided with grooves on the inside diameter, whereas the ring with the conventionally executed inside diameter appears to deliver sufficient amount only at low shaft speeds.
554 Centrifugal Pumps; Design and Application Figure 20-22. Conventionally lubricated centrifugal pumps using oil rings must pay close attention to oil levels (courtesy of Sulzer-Weise, Bruchsal, Germany), In summary, proper lubrication of rolling element bearings in centrifugal pumps depends on such factors as bearing preload, cage inclination, point of introduction of lube oil, and oil ring design, immersion, oil vis- Figure 20-23. Amount of oil delivered by grooved and non-grooved rings (courtesy of H. Heshmat and O. Pinkus, "Experimental Study of Stable High-Speed OH Rings").
- Page 518 and 519: Table 19-1 Vertical Alignment Movem
- Page 520 and 521: Table 19-2 Continued Horizontal Ali
- Page 522 and 523: Alignment 507 bearing motors becaus
- Page 524 and 525: Alignment 509 meet results. It shou
- Page 526 and 527: Alignment 511 Determination of Tole
- Page 528 and 529: Table 19-3 Continued Primary Alignm
- Page 530 and 531: Alignment 515 Figure 19-3 A & B. Tw
- Page 532 and 533: Table 19*4 Continued Methods of Cal
- Page 534 and 535: Alignment 510 parallelism/perpendic
- Page 536 and 537: Alignment 521 Table 19-5 continued
- Page 538 and 539: Alignment 523 3. Essinger, J. N., B
- Page 540 and 541: Rolling Element Bearings and Lubric
- Page 542 and 543: Rolling Element Bearings and Lubric
- Page 544 and 545: Roiling Element Bearings and Lubric
- Page 546 and 547: Rolling Element Bearings and Lubric
- Page 548 and 549: Rolling Element Bearings and Lubric
- Page 550 and 551: Rolling Element Bearings and Lubric
- Page 552 and 553: Rolling Element Bearings and Lubric
- Page 554 and 555: Rolling Element Bearings and Lubric
- Page 556 and 557: Rolling Element Bearings and Lubric
- Page 558 and 559: Rolling Element Bearings and Lubric
- Page 560 and 561: Roiling Element Bearings and Lubric
- Page 562 and 563: Rolling Element Bearings and Lubric
- Page 564 and 565: Rolling Element Bearings and Lubric
- Page 566 and 567: Rolling Element Bearings and Lubric
- Page 570 and 571: Rolling Element Bearings and Lubric
- Page 572 and 573: Failure Analysis Mechanical Seal Re
- Page 574 and 575: Table 21-2 Causes of Seal Failures
- Page 576 and 577: Mechanical Seal Reliability 561 ^mi
- Page 578 and 579: Mechanical Seal Reliability 563 Sea
- Page 580 and 581: Mechanical Seal Reliability 565 run
- Page 582 and 583: Reliability Mechanical Seal Reliabi
- Page 584 and 585: Index A thermal growth, 519-522 ver
- Page 586 and 587: Critical speed analysis. See also V
- Page 588 and 589: Index 573 inlet angle, 37 classific
- Page 590 and 591: Index 575 Shaft design, 333-343 ind
- Page 592: double, 52-54 velocity ratio, 50-51
554 <strong>Centrifugal</strong> <strong>Pumps</strong>; <strong>Design</strong> <strong>and</strong> <strong>Application</strong><br />
Figure 20-22. Conventionally lubricat<strong>ed</strong> centrifugal pumps using oil rings must<br />
pay close attention to oil levels (courtesy of Sulzer-Weise, Bruchsal, Germany),<br />
In summary, proper lubrication of rolling element bearings in centrifugal<br />
pumps depends on such factors as bearing preload, cage inclination,<br />
point of introduction of lube oil, <strong>and</strong> oil ring design, immersion, oil vis-<br />
Figure 20-23. Amount of oil deliver<strong>ed</strong> by groov<strong>ed</strong> <strong>and</strong> non-groov<strong>ed</strong> rings (courtesy<br />
of H. Heshmat <strong>and</strong> O. Pinkus, "Experimental Study of Stable High-Spe<strong>ed</strong><br />
OH Rings").
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