Results 61 to 70 of about 17,651 (213)

A Numerical Study on Influence of Temperature on Lubricant Film Characteristics of the Piston/Cylinder Interface in Axial Piston Pumps

open access: yesEnergies, 2018
The loss of kinetic energy of moving parts due to viscous friction of lubricant causes the reduction of piston pump efficiency. The viscosity of lubricant film is mainly affected by the thermal effect. In order to improve energy efficiency of piston pump,
Yueheng Song, Jiming Ma, Shengkui Zeng
doaj   +1 more source

A multi-sensor fault detection strategy for axial piston pump using the Walsh transform method

open access: yesInternational Journal of Distributed Sensor Networks, 2018
The axial piston pump is a key component of the industrial hydraulic system, and the failure of pump can result in costly downtime. Efficient fault detection is very important for improving reliability and performance of axial piston pumps. Most existing
Qiang Gao   +3 more
doaj   +1 more source

Recent Advances in Design of Low Cost Film Concentrator and Low Pressure Free Piston Stirling Engines for Solar Power [PDF]

open access: yes, 1984
The free piston Stirling-linear alternator was shown to be scalable to power levels of tens of kilowatts in a form which is simple, efficient, long lived and relatively inexpensive.
Beale, W.   +2 more
core   +1 more source

A computational model of axial piston swashplate pumps

open access: yesEnergy Procedia, 2017
Abstract Variable displacement hydraulic machines offer a very promising alternative and energy saving solution for many applications in mobile machines, mobile robots and other applications. In the present paper an axial piston swashplate pump will be theoretically analyzed and explained using the software AMESim in order to estimate the piston ...
Fornarelli, Francesco   +3 more
openaire   +3 more sources

Research on Control Methods for the Pressure Continuous Regulation Electrohydraulic Proportional Axial Piston Pump of an Aircraft Hydraulic System

open access: yesApplied Sciences, 2019
The objective of this paper is to design a pump that can match its delivery pressure to the aircraft load. Axial piston pumps used in airborne hydraulic systems are required to work in a constant pressure mode setting based on the highest pressure ...
Peng Zhang, Yunhua Li
doaj   +1 more source

Rotating and positive-displacement pumps for low-thrust rocket engines. Volume 1: Pump Evaluation and design [PDF]

open access: yes
Rotating and positive displacement pumps of various types were studied for pumping liquid fluorine for low-thrust, high-performance rocket engines. Included in the analysis were: centrifugal, pitot, Barske, Tesla, drag, gear, vane, axial piston, radial ...
Csomor, A., Macgregor, C.
core   +1 more source

Determination of Actual Discharge of High-Pressure Low-Discharge Axial Piston Pumps [PDF]

open access: yes, 2014
High-pressure low-discharge axial piston pumps are commonly used for the dosage of fluids of various physical properties and can be found in numerous technical systems.
Ančić, Ivica   +2 more
core   +1 more source

Oil cooling system for a gas turbine engine [PDF]

open access: yes, 1977
A gas turbine engine fuel delivery and control system is provided with means to recirculate all fuel in excess fuel control requirements back to the aircraft fuel tank.
Coffinberry, G. A., Kast, H. B.
core   +2 more sources

Specific wavelength colorimeter [PDF]

open access: yes, 1974
A self contained, specific wavelength, single beam colorimeter is described for direct spectrophotometric measurement of the concentration of a given solute in a test sample.
Brawner, C. C.   +2 more
core   +1 more source

Axial jet mixing of ethanol in spherical containers during weightlessness [PDF]

open access: yes
An experimental program was conducted to examine the liquid flow patterns that result from the axial jet mixing of ethanol in 10-centimeter-diameter spherical containers in weightlessness. Complete liquid circulation flow patterns were easily established
Audelott, J. C.
core   +1 more source

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