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hydraulic pumps

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089722
EISBN: 978-1-62708-217-4
...Abstract Abstract A welded elbow assembly (AISI type 321 stainless steel, with components joined with ER347 stainless steel filler metal by gas tungsten arc welding) was part of a hydraulic-pump pressure line for a jet aircraft. The other end of the tube was attached to a flexible metal hose...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... for that support and for the encouragement of Dr. J. Stringer, the EPRI project manager. Cavity formation and collapse in liquids have been studied extensively over the years ( Ref 5 , 6 ). Machines and components that suffer cavitation damage include hydraulic pumps, valves, hydroturbine runners and guide...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001023
EISBN: 978-1-62708-214-3
... of the splines. Most Probable Cause Remedial Action The failed splined shaft and gear assembly forms an integral part of the ATAR engine accessory drive gear train. The gear train provides power from the main engine to the engine accessories, including hydraulic pumps and the electrical system. Because...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001779
EISBN: 978-1-62708-241-9
... in hydraulic machinery such as pumps, turbines, and propellers. The pressure waves are released by the collapse of vapor structures which interact with solid surfaces and lead to material damage. This phenomenon results in the reduction of a pump’s life and efficiency, vibration in framework, and extra noises...
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
... of CETIM Fig. 12 Cavitation erosion on side surface of a gear pump subjected to vibrations. Courtesy of CETIM Fig. 9 Wear on suction surface of centrifugal pump impeller by cavitation and solid particle erosion. Courtesy of CETIM Fig. 10 Wear on pressure surface of centrifugal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
... system used to operate equipment and machinery. The couplings were used to connect piping to other piping or to equipment. The hydraulic system comprised reservoirs of hydraulic fluid, internal gear pumps, and accumulators to minimize pressure fluctuations. Different types of hydraulic couplings...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
...Abstract Abstract Failure analysis was performed on a fractured impeller from a boiler feed pump of a fossil fuel power plant. The impeller was a 12% Cr martensitic stainless steel casting. The failure occurred near the outside diameter of the shroud in the vicinity of a section change...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001116
EISBN: 978-1-62708-214-3
..., and they produce water as well as hydrocarbons. Carbon dioxide and hydrogen sulfide are also common constituents of the produced fluids. The pipe was obtained from a distributor to replace an old string in a well. The well was a hydraulically jet pumped well about 1800 m (6000 ft) deep that produced oil, water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001682
EISBN: 978-1-62708-229-7
..., is fabricated from austenitic stainless steel and contains piping, valves, a main pump, two heat exchangers, and expansion joints. The heat generated during nuclear operations is transferred from the heavy water to the secondary cooling water system through the heat exchangers. The secondary cooling water...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001353
EISBN: 978-1-62708-215-0
... was overloading of the flap valve due to hydraulic shock waves in the line and use of a low-toughness forging material. The step in the forging acted as a notch. To avoid such failures, steels with improved impact properties that meet a minimum Charpy impact value of 34.3 J (25.3 ft . lbf) at room temperature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001724
EISBN: 978-1-62708-234-1
... stresses than forging under a hydraulic press while on a mandrel. Rolling is a preferred method — always provided the rolls are capable of exerting a load sufficient for the cold work to penetrate through the full thickness of the end bell, since otherwise the inner and outer surfaces would be stretched...
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.a0001817
EISBN: 978-1-62708-180-1
... Copper alloy C70600 tube from a hydraulic-oil cooler. The cooler failed from crevice corrosion caused by dirt particles in river water that was used as a coolant. (a) Inner surface of hydraulic-oil cooler tube containing a hole (arrow A) and nodules (one of which is indicated by arrow B) formed from...
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
.... Another example of such a failure is the inability of an integrated circuit to function reliably. In the next level of severity of failure, a system or component is inoperable ( Ref 13 ), such as a pump shaft fracture that causes the impeller to seize or a loss of load-carrying capability...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... abrasive/wear material contact. For a large number of abrasive wear environments, the velocity of abrasive particles is relatively low (&lt;10 m/s) and therefore of little importance. However, in slurry pumps, that is, the transport of abrasive particles in slurry or pneumatic form, the effect of velocity...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
..., chutes, slurry pumps, and cyclones. However, abrasive wear is not limited to these activities. Abrasion presents problems in many wear environments at one point or another, even though it may not be the primary wear mechanism to begin with. In any tribosystem where dust and wear debris are not, or cannot...
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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... and industries that have experienced SCC failures include (this list is not exhaustive): Aerospace: Aluminum alloys in structural aircraft components such as landing gear and wing components, stainless steel tubing used as part of the hydraulic or fuel systems, high-strength low-alloy steel...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... in making connections to an aluminum alloy 2024-T431 valve body produced excessive stress in the threads and resulted in failure of the valve body by SCC in a service environment of hydraulic fluid that contained small amounts of moisture and chloride. Similarly, stresses on tapered threads on a cast...