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pump bearing journal

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
...Abstract Abstract A heat transport pump in a heavy water reactor failed (exhibiting excessive vibration) during a restart following a brief interruption in coolant flow due to a faulty valve. The pump had developed a large crack across the entire length of a bearing journal. An investigation...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... Analysis of Journal Bearings Used in Sugar Mills , Eng. Fail. Anal. , Vol 18 , 2011 , p 2093 – 2103 10.1016/j.engfailanal.2011.06.016 On the basis of geometric shapes, sliding bearings ( Fig. 1 ) are classified into flat, cylindrical, and spherical bearings. Flat sliding bearings include...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... Section of a forged steel crankshaft showing beneficial grain flow around the geometrical features Fig. 38 Crankpin of a crankshaft that fractured in fatigue after the crankpin journals and main-bearing journals were rebuilt by metal spraying. (a) Fracture surface showing fracture origin (arrow...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... Barrel-shape and hourglass-shape journals. These types of journals can penetrate the oil film and result in bearing failure because of increased loading in localized areas. Fig. 13 Lower (left) and upper (right) halves of trimetal bearings for a diesel engine that failed because of distortion...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
...Abstract Abstract The main shaft in a locomotive turbocharger fractured along with an associated bearing sleeve. Visual and fractographic examination revealed that the shaft fractured at a sharp-edged groove between two journals of different cross-sectional area. The dominant failure mechanism...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... sometimes subjected to vibratory stresses. Apart from wear by bearings, which can be a major contributor to shaft failure (see the section “Wear” in this article), the most common cause of shaft failure is metal fatigue. Fatigue is a weakest link phenomenon; hence, failures start at the most...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... for cavitation. To reduce cavitation in a diesel engine main bearing, for example, optimized groove ending geometry can reduce cavitation erosion effectively ( Ref 22 ). A similar principle of modification can be applied in a centrifugal pump impeller. Reduction of diametrical clearance limits the journal...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... Turbine blades; centrifugal pumps; ship propellers; high-speed lubricated sliding bearings Corrosive wear Wear conjoint with corrosion, as in a metal bushing versus a shaft immersed in water Rolling wear occurs when two bodies roll one over the other. Some sliding always occurs in the contact...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... and loading. Example 4: Damaged Austenitic Cast Iron Impellers in a Rotary Pump Caused by Cracks Initiated at Zones of Localized Shrinkage Porosity <xref rid="a0003508-ref11" ref-type="bibr">(Ref 11)</xref> Two damaged impellers manufactured from austenitic cast iron came from a rotary pump used...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
...–90 175–195 Paper machine dryer drum 120–130 250–265 Hot gas ventilators 90 195 Automotive water pump bearing 120 250 Turbo compressor 120 250 Crankshaft of internal combustion engines 120 250 Drums and extrusion spindle of plastic machines 180 355 Wheel bearings...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... radii (e.g., on shafts at bearing journals). Other examples include unanticipated residual stresses associated with heat treating configurations designed with complex geometries, or assembly stresses from configurations that contain unwanted interference. Inappropriate surface treatments could result...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
..., a system or component is inoperable ( Ref 1 ), such as a pump shaft fracture that causes the impeller to seize or a loss of load-carrying capability of a structural bolt in service due to fracture. Failure analysis is a systematic, methodical process to determine the physical causes of problems...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... identification of areas that may deserve closer scrutiny, as shown by the example in Fig. 7 , where BSE imaging quickly reveals high-atomic-number material embedded in the surface. This particular example is of a failed superalloy shaft. Lead from a nearby failed journal bearing, invisible in the secondary...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... is of a failed superalloy shaft. Lead from a nearby failed journal bearing, invisible in the secondary image, is readily apparent in the BSE image. Unlike the secondary electrons that can be attracted to a detector, the high energy BSE signal can only be collected by placing a detector in a position where...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... to reveal substantial grain-boundary carbide precipitation Fig. 35 Ultimate tensile strength versus hydrogen porosity for sand cast bars of three aluminum alloys Fig. 24 Micrographs of a failed crankshaft main-bearing journal. (a) Cope side showing the surface broken open, with raised...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
..., depending on parameters Type of extreme value distribution Bounded to the left (cannot be negative) Applications: life of electronic components; material strengths (fracture toughness), time to wear out (bearings, pumps) Exponential Exponential One parameter (sometimes two...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... in towers, where molten salts are heated and pumped to a storage tank where they can power an electric-power-generating system (EPGS) in which thermal energy is converted to electricity. Afterward, the cooled molten salt is pumped to the solar tower to be reheated. Source: Ref 76 . Courtesy of U.S...