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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 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...
Image
Published: 01 December 2019
Fig. 6 Heat transport pump journal bearing assembly More
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 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 was low...
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
... bearings are used when the load or reaction force is parallel to the direction of the shaft axis. The cylindrical surface (the shaft and journal) pair, also known as a journal bearing, is used when the load or reaction force is essentially radial. These bearings are the most common type of sliding bearing...
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
... the axial movement of rotating shafts. Spherical surfaces allow rotary motion around more than one axis, such as that provided by the hip joint of the human skeleton. The cylindrical surface pair (the shaft and journal pair) is the most common type in machines. These are also called plain bearings or simple...
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
... stresses, with engine crankshafts and pump shafts as typical examples. 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...
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
... Abstract This article considers two mechanisms of cavitation failure: those for ductile materials and those for brittle materials. It examines the different stages of cavitation erosion. The article explains various cavitation failures including cavitation in bearings, centrifugal pumps...
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
... 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 vulnerable point in a dynamically...
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: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... 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 of heat treatment wagons 200–300 390–570 Source: Ref 4 Environmental Properties...
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
... 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 region...
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
... example 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. Fig. 7 Electron images of a superalloy shaft fracture. (a) Backscattered electron image. (b) Secondary electron image. Bright areas are lead...
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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... atomic number embedded in the surface. This particular example 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. Fig. 7 Electron images of a superalloy shaft fracture. (a) Backscattered electron image...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
... AN ENGINEERING PLASTIC is defined as a synthetic polymer with mechanical properties that enable its use in the form of a load-bearing shape. Polymers, which constitute the major portion of an engineering plastic, are made up of extremely large molecules formed from polymerization of different monomers...
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
... by cracking at the junctions of the crankpins or journals with the webs. Such failures may arise from bending and/or torsional stresses, and in any investigation of such a mishap it is important to ascertain which of the two stress systems predominated. In the case of plain bending, the crack extends more...
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
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...