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hydraulic pumps

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Published: 31 December 2017
Fig. 1 Limits of operation of hydraulic pumps. (1) Fluid film formation, (2) mechanical strength, (3) heat balance or life of rolling bearing, (4) cavitation More
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Published: 31 December 2017
Fig. 8 Wear of piston and slipper in hydraulic pump. Source: Ref 10 More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006429
EISBN: 978-1-62708-192-4
... of machines such as positive displacement pumps including hydraulic pumps, turbo-pumps including centrifugal pumps, vacuum pumps, and compressors including the positive displacement type and turbo type. wear fluid machineries fluid power systems friction lubrication hydraulic pumps turbo-pumps...
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
..., result in erosion of solid surfaces. Affected Systems and Materials 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 vanes...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005734
EISBN: 978-1-62708-171-9
... (fused), Cr 3 C 2 /NiCr PS, HVOF, HVAF, DG Pump case and impeller rings and sleeves, valve components, concrete pump and mixer parts, hydraulic rods, bushings and pins, hard chrome plate alternatives, cutting blades, paper pulp suction rolls, oil recovery parts in tar sand applications, directional...
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Published: 31 December 2017
Fig. 2 Region of feasible operating conditions of swashplate type axial piston pump. Wear of slipper. Fluid lubrication in a slipper bearing: (1) metal-metal contact during the pump delivery stroke, and (2) suction to delivery stroke. Courtesy of A. Yamaguchi, Yokohama National University More
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005124
EISBN: 978-1-62708-186-3
... cell ( Fig. 11 ). Fluid-cell bladders can be of neoprene or polyurethane composition. Hydraulic fluid is pumped into the cell, causing it to inflate or expand. The expansion creates the force needed to flow the rubber of the work pad downward, over and around the form block and the metal to be formed...
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Published: 01 December 2008
Fig. 33 Sand casting, pressure die casting, and squeeze casting of aluminum/fly ash composite. (a) Sump pump cover. (b) Greenlee hydraulic tool handle cast at Eck Industries. (c) Mounting bracket die cast at Eck Industries. (d) Motor mounts cast at Thompson Aluminum More
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006034
EISBN: 978-1-62708-175-7
... of the die cavity Medium speed: Pressing capacities ∼50% of full-rated capacity, used during initial compaction when lower pressing force is required Slow speed: Maximum capacity available for final compaction Two types of hydraulic pumping systems are commonly found in PM presses: the high...
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Published: 01 December 2008
Fig. 31 Schematic of a vacuum induction degassing unit. (a) Top view. (b) Side view. 1, mold, die, or ladle; 2, charging device; 3, filter; 4, vacuum pumping system; 5, melt current supply; 6, vessel with vacuum bell; 7, gas-purging set; 8, cooling water manifold; 9, control cabinet; 10 More
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005113
EISBN: 978-1-62708-186-3
... of the side. The air-friction clutch provides a cushioning effect that extends die life. Hydraulic Press-Brake Drive Systems Hydraulic press-brake drive systems ( Fig. 8 ) are relatively less complex than mechanical-drive press brakes. They are comprised of a motor, a pump, a valving system...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006553
EISBN: 978-1-62708-210-5
... and solid aluminum bearings are employed as connecting rod and main bearings in internal combustion engines and industrial compressors. Other aluminum bearing applications are in heavy tooling, such as boring mills, presses, lathes, milling machines, and grinding mills, and as hydraulic pump bushings...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001382
EISBN: 978-1-62708-173-3
... clamps. In contrast, the support framework was of a lighter construction in order to accommodate the motor drive, transmission, and other auxiliary equipment. Hydraulic Services The hydraulic circuit had a conventional layout, in that all services were supplied from a dual pump. A gear pump...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005107
EISBN: 978-1-62708-186-3
... for waterjet cutting. Intensifier Pumps Intensifier pumps create water pressures of 210 to 415 MPa (30 to 60 kpsi) and flow rates to 13 L/min (3.5 gal/min). A motor drives a hydraulic radial piston with an intensification ratio of 20 to 1; that is, the water pressure is twenty times the oil pressure...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003973
EISBN: 978-1-62708-185-6
... as the ram is withdrawn can be pressurized to improve hydraulic flow characteristics, but this is not mandatory. When the ram contacts the workpiece, the pilot-operated check valve between the ram cylinder and the reservoir closes, and the pump builds up pressure in the ram cylinder. Modern control systems...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003699
EISBN: 978-1-62708-182-5
... submerged-pump wells, which use multistage centrifugal pumps placed near the bottom of the well; and hydraulically pumped wells, which use positive-displacement pumps driven hydraulically by oil or water from a surface motor and pump. Gas Wells Most gas wells flow naturally. These include dry gas...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006114
EISBN: 978-1-62708-175-7
... to high vibration and heavy service; hardened by heat treating FC-0208 or FN-0106; 6.4–6.8 g/cm 3 Medium high pressure 6.9–8.6 MPa (1000–1250 psi) for short intervals; hardened by heat treating FC-0208 type; 6.2–6.5 g/cm 3 General-purpose hydraulic pumps up to 10.3 MPa (1500 psi) continuous...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002158
EISBN: 978-1-62708-188-7
..., variable-displacement, pressure-compensated hydraulic pump. Typical hydraulic pressures are adjustable to about 20 MPa (3 ksi). Intensifier The intensifier ( Fig. 2 ) is used to increase the water pressure up to 380 MPa (55 ksi). The hydraulic pressure is applied to the low-pressure cylinder...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001230
EISBN: 978-1-62708-170-2
... of the driving forces for finishing methods is to achieve improved or closer tolerances. As an example, finished parts of closer tolerances in a hydraulic pump help to achieve higher pump efficiency, which results in improved power steering performance and thus enhances the quality of an automobile. Closer...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006432
EISBN: 978-1-62708-192-4
... be compared via a continuous observation of wear, which includes running-in and steady-state wear. A one-stop measurement without any information about the previous behavior will inevitably lead to wrong conclusions. Hydraulic Pump Wear—Wear Measurement with Radioactive Isotopes Produced in a Reactor...