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Lubrication systems

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0009190
EISBN: 978-1-62708-225-9
... Abstract In an industrial application, 24 speed-increaser gearboxes were used to transmit 258 kW (346 hp) and increase speed from 55 to 375 rev/min. The gears were parallel shaft, single helical, carburized, and ground. The splash lubrication system used a mineral oil without antiscuff...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... loading. It was revealed by visual examination that the fracture had initiated in the sharp corner at the bottom of a longitudinal hole which was part of a force feed lubricating system. Beach marks were observed on the fracture surfaces. It was revealed by further examination that the slip clutch...
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
... (cyclic/steady, unidirectional/reversing) Speed Lubricants and lubrication system characteristics Lubricant cleanliness and filtration Operating temperatures Counterface (shaft) material and finish Alignment It is necessary to understand the bearing geometry (shapes, grooving...
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
... pumps) or a specifically applied lubricant. It is usually the case that the more severe the duty of bearings the more precisely they will be made and the more likely there will be a support (lubrication) system to ensure long life and to prevent catastrophic failure. Bearing Materials The lowest...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... trapped within the lubricant. The evaluation of wear with added third-body abrasives using polymer mass loss can be difficult for similar reasons to lubricated experiments. Abrasives embedded in the polymer surface could impact the mass of the sample, which lends this type of wear system to different...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001045
EISBN: 978-1-62708-214-3
... exchanger tubes began to leak after approximately 5.5 years of operation in a 2500 MW hydroelectric power plant. Cooling systems Dezincification Hydroelectric power generation Lubrication systems Yellow brass, 65% Cu UNS C27000 Dealloying/selective leaching Handbook of Case Histories...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... mechanics fracture modes fracture surface lubricants macroscopic examination mechanical testing microscopic examination nondestructive inspection sampling simulated-service testing stress analysis wear failure ANALYZING the inevitable failures that occur during testing, manufacturing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047998
EISBN: 978-1-62708-225-9
... Abstract The drive-shaft hanger bearings failed after 300 to 400 h in service. The shaft, supported by labyrinth-sealed single row radial ball bearings of ABEC-1 tolerances, was made of aluminum 2024-T3 tubing (2.5 cm diam and 1.2 mm wall thickness). The bearings were lubricated with a paste...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
... the degradation of various protective systems, such as corrosion inhibitors and lubricants. The article describes the failure analysis of steel, iron, copper, aluminum, and their alloys. It also discusses the probes available to monitor conditions relevant to MIC in industrial systems and the sampling...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001382
EISBN: 978-1-62708-215-0
... subjected to repeated bending stresses. These stresses placed the oil port hole in cyclic tension, leading to fatigue cracking around the hole. If the system had been properly lubricated, the bolt would have rotated during service, spreading the cyclic tensile stresses around the circumference of the bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001248
EISBN: 978-1-62708-221-1
... of the transmission system showed there might arise possibilities of choking in the line lubricating oil. Such eventualities would, of course, cause seizure of the gears and damage. The incidence of such defects stopped after corrective measures were taken. In this particular instance, corrective measures could...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001356
EISBN: 978-1-62708-215-0
... hydrogen used to cool the ring. Factors which promoted the failure were higher than normal strength levels in the ring material, lower than normal ring operating temperatures, possible moisture in the lubrication oil system, periodic poor performance of the hydrogen dryers, and a ring design which allowed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006424
EISBN: 978-1-62708-217-4
... Abstract An external tank pressure/vent valve regulates the external tank fuel feed system, which transfers fuel under pressure to the internal tanks of the aircraft. A dual-position valve was found to be sticking at the intermediate positions. Also, service air check valves located...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0046242
EISBN: 978-1-62708-236-5
... be checked for residual magnetism and should be demagnetized if any is present. The lubrication oil should be changed or filtered to remove any debris from previous damage to the gears. The oil-circulation system should be put into operating conditions. Selected References Selected References...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
.... The crack reached the critical size and caused failure by stress-corrosion cracking (SCC) under static loading conditions in service. The failed beam was protected by a well adhering paint system. However, the presence of adequate amounts of corrosion preventive compound films (CPC) on the surfaces...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
... to this stage were changing from AMPCO 45 to AMPCO 25 in addition to modifying the dimensions and enlarging the square bearing by 0.015 in. The previous lubricant was also changed to something more suitable for the process. Lab tests conducted by the manufacturer of the system measured improvements in crimp...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... recommended that the wiredrawing process be reviewed at various levels of steel cleanliness to predict the incidence of drawing defects at the wire surface. Testing the surface quality of the wire prior to spring manufacture was also suggested. Aircraft components Commercial planes Lubrication systems...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... in Fig. 7 and of a piston in Fig. 8 . The causes of seizure, which is mainly governed by excessive loading and heating, include ( Ref 15 ): Poor heat dissipation, mainly related to material properties, such as thermal conductivity Poor lubrication system or improper lubrication Excessive...
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
... in engineering systems. They are quite important in dry conditions, that is, when no lubricant is present between the mating surfaces. In this case, the mechanism may be either tribo-oxidative or adhesive wear, depending on the operating parameters (i.e., nominal contact pressure, p , and sliding velocity, v...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... on fatigue. Defects in cooling and lubricating systems of the engine. Non-conformance of the chemical composition with the specification. Defects in microstructure near the cracked zone. The existence of inclusions in the cylinder head. Low strength and hardness. cylinder head...