Results 151 to 160 of about 6,027 (213)

Ex-PALM: a negative pressure ventilation system for air leak evaluation in <i>ex vivo</i> lungs. [PDF]

Front Bioeng Biotechnol
Vartazarmian M, Abid A, Chermat R, Têtu M, Bulgarelli Maqueda L, Sarshoghi A, Naghieh S, Périé D, Liberman M.   +8 more
europepmc   +1 more source

Volumetric efficiency in motor-driven two-dimensional piston pumps with leakage and reverse flow under high pressure. [PDF]

Sci Rep
Chen Y, Hua C, Tong C, Zang Y, Ruan J.
europepmc   +1 more source

1,4-Butanediol - Determination of 1,4-butanediol in workplace air using gas chromatography (GC-FID): Air Monitoring Method - Translation of the German version from 2025. [PDF]

MAK Collect Occup Health Saf
Werner S, Nitschke L, Hebisch R, Lewin-Kretzschmar U, Hartwig A, MAK Commission https://www.dfg.de/de/ueber-uns/gremien/senat/arbeitsstoffe/mitglieder.   +5 more
europepmc   +1 more source

Fault diagnosis methods for imbalanced samples of hydraulic pumps based on DA-DCGAN. [PDF]

Sci Rep
Zhao Y, Jiang A, Jiang W, Zhang P, Xiong P.   +4 more
europepmc   +1 more source

Joint simulation and experimental verification of electromechanical-hydraulic of hydraulic excavator working device. [PDF]

Sci Rep
Xin M, Ren Z, Yu Y, Tian Y, Zhang H, Ren K, Zhang Y.   +6 more
europepmc   +1 more source

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A mercury piston pump

Journal of Scientific Instruments, 1966
A hydrocarbon-free backing pump is described in which only stainless steel, tungsten carbide and mercury are exposed to the vacuum system. The pumping speed is approximately 41. min-1 and the lowest pressure measured using the pump in conjunction with a cold trap was approximately 20 μtorr.
A J Davis, G J Ogilvie
openaire   +1 more source

Experimental Simulation of Piston Leakage in an Axial Piston Pump

Fluid Power Systems and Technology, 2005
A method used to introduce “artificial leakage” into an axial piston pump to simulate leakage from a worn piston is described in this paper. A pressure control servo valve with a very high frequency response was employed to divert flow from the pump outlet in a prescribed waveform directly to tank.
Zeliang Li, Richard Burton, Peter Nikiforuk   +2 more
openaire   +1 more source

Modelling a Double Piston Pump

Proceedings of SPE International Thermal Operations and Heavy Oil Symposium and International Horizontal Well Technology Conference, 2002
Abstract The idea of using serial arrangements of sucker rod pumps to efficiently produce heavy oil wells with high gas to oil ratio has been analyzed in Venezuela since 1996. However, models to calculate the dimensions of the required plungers have not been presented in previous literature. An analytical model is presented in this work,
Becerra, Oscar, Kenyery Frank
openaire   +2 more sources

The Pumping Dynamics of Swash Plate Piston Pumps

Journal of Dynamic Systems, Measurement, and Control, 1989
This paper describes a study of the cylinder pressure and flow in an oil hydraulic axial piston pump. A comparison is made between a theoretical model based on the effects of fluid compliance within the cylinder, and an improved model which accounts for the influence of oil momentum in the port plate region.
K. A. Edge, J. Darling
openaire   +1 more source

Dynamic of an Axial Piston Pump With Floating Pistons

BATH/ASME 2024 Symposium on Fluid Power and Motion Control
Abstract A new structure of the axial piston pump was proposed to address the limitation of its application under low viscosity medium conditions due to the insufficient oil film bearing capacity. The piston of this structure is in a floating state in the axial direction, and both ends of the piston are supported by a discrete cylinder ...
Baoyu Liu, Lifeng Ma, Gaocheng An, Lankang Li, Jiaqi Guo, Wenwei Wang   +5 more
openaire   +1 more source