New Developments in Fluidics for Aircraft High-Pressure Hydraulic System Applications

1970 ◽  
Author(s):  
David H. Smith ◽  
Royce F. Church
Keyword(s):  
High Pressure ◽  
Hydraulic System ◽  
New Developments

Oil Source Valve Optimized Design and its Application in Mechanical Loader

2014 ◽  
Vol 1044-1045 ◽  
pp. 930-932
Author(s):  
Yu Ping Wei
Keyword(s):  
Operating System ◽  
High Pressure ◽  
Hydraulic System ◽  
Optimized Design ◽  
Variable Speed ◽  
Small Flow ◽  
Oil Source ◽  
Working Device ◽  
Large Flow

The operating system of loader working device is composed of the boom and bucket. It is operated mainly through multi-way valve axis manipulation, this kind of way is force-large, labor-intensive, but is low efficient. So it is necessary to optimize the oil source valve. Using the hydraulic pilot to control loader multi-way valve to optimize in the loader is safe, comfortable, furnished spirit and can achieve variable speed. Working hydraulic system uses a small flow pilot circuit control. The main oil is controlled by high pressure and large flow, and then the operating force of the working device is reduced greatly.

Thermal Equilibrium Analysis of Loaders’ High-Pressure Hydraulic System

2010 ◽  
Vol 139-141 ◽  
pp. 975-980
Author(s):  
Xiao Bin Wang ◽  
Shu Mei Chen ◽  
He Ting Huang ◽  
Ji Wen Zhuo
Keyword(s):  
High Pressure ◽  
Thermal Equilibrium ◽  
Hydraulic System ◽  
Power Loss ◽  
Practical Work ◽  
Equilibrium Analysis ◽  
Wheel Loader ◽  
Simulation Results ◽  
The Cost ◽  
Research Show

The Loaders’ hydraulic transmission system trends towards medium and high-pressure. The research object of this paper is thermal equilibrium of new quantitative medium and high-pressure hydraulic system of type 50 of wheel loader, which is developed by Xiamen Xia Gong (XG) Machinery Co., Ltd. (abbreviated as XGMA). Aim is to research the thermal equilibrium of loader’s hydraulic system before increasing the pressure at 16MPa and prove the simulation results reliability through experiment (max error is 11.57%). The simulation results are thought to be reliable, after ignoring some disturbance factors existing in the practical work. Consequently, loader's thermal equilibrium have been done after increasing pressure to 20MPa, the results of research show that thermal equilibrium will be obviously optimized, it will drop power loss (drop 17%) and improve hydraulic system’s reliability and reduce the cost after pressure was raised.

scholarly journals New Developments in the Field of Reaction Technology: The Multiparallel Reactor HPMR 50-96

2005 ◽  
Vol 2005 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Arne Allwardt ◽  
Norbert Stoll ◽  
Christian Wendler ◽  
Kerstin Thurow
Keyword(s):  
High Pressure ◽  
Drug Development ◽  
Systems Integration ◽  
Laboratory Automation ◽  
Parallel Reaction ◽  
New Developments ◽  
Reaction Systems ◽  
Reaction Chambers ◽  
Bulk Chemistry

Catalytic high-pressure reactions play an important role in classic bulk chemistry. The optimization of common reactions, the search for new and more effective catalysts, and the increasing use of catalytic pressure reactions in the field of drug development call for high-parallel reaction systems. A crucial task of current developments, apart from the parameters of pressure, temperature, and number of reaction chambers, is, in this respect, the systems' integration into complex laboratory automation environments.

An Opposed Piston Rapid Compression Machine for Preflame Reaction Studies

1968 ◽  
Vol 183 (1) ◽  
pp. 365-387 ◽  
Author(s):  
W. S. Affleck ◽  
A. Thomas
Keyword(s):  
High Pressure ◽  
Rapid Quenching ◽  
Chemical Processes ◽  
Spontaneous Ignition ◽  
Rapid Compression Machine ◽  
Compression Process ◽  
New Developments ◽  
Temperature And Pressure ◽  
Rapid Compression ◽  
Novel Design

Mixtures of fuel and air ignite spontaneously if exposed to sufficiently high temperatures. Such ignition is not an instantaneous event, and there is always a delay of chemical origin between the establishment of the particular conditions of temperature and pressure and the rapid, exothermic chemical reactions that constitute ignition. This delay is of outstanding importance in any fuel application in which spontaneous ignition plays a part. It is determined by the progress of the near-isothermal chemical processes that precede ignition, and these processes therefore merit continued study. This paper describes the development of an experimental technique which allows these studies to be extended to much higher pressures than those accessible in glass vessels, while retaining many of the advantages of laboratory vessel experiments. This technique is centred on a rapid compression machine of novel design which is used to heat and compress fuel/air mixtures to conditions near those in a knocking engine. After this compression process, which occupies a few milliseconds only, the hot, high pressure charge is held at constant volume while thermochemical, spectroscopic or analytical observations are made. The principal new developments in the machine are the use of twin opposed pistons for compression with an associated hydraulic synchronizing system and a precisely triggered valve that enables rapid quenching and sampling of the reacting mixture to be made at an appropriate stage of reaction.

scholarly journals New developments in high pressure x-ray spectroscopy beamline at High Pressure Collaborative Access Team

2015 ◽  
Vol 86 (7) ◽  
pp. 072206 ◽  
Author(s):  
Y. M. Xiao ◽  
P. Chow ◽  
G. Boman ◽  
L. G. Bai ◽  
E. Rod ◽  
...  
Keyword(s):  
High Pressure ◽  
New Developments ◽  
X Ray

scholarly journals New developments in micro-X-ray diffraction and X-ray absorption spectroscopy for high-pressure research at 16-BM-D at the Advanced Photon Source

2015 ◽  
Vol 86 (7) ◽  
pp. 072205 ◽  
Author(s):  
Changyong Park ◽  
Dmitry Popov ◽  
Daijo Ikuta ◽  
Chuanlong Lin ◽  
Curtis Kenney-Benson ◽  
...  
Keyword(s):  
High Pressure ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
New Developments ◽  
X Ray ◽  
X Ray Absorption ◽  
Photon Source

scholarly journals New Developments in Deformation Experiments at High Pressure

2002 ◽  
Vol 51 (1) ◽  
pp. 21-49 ◽  
Author(s):  
W. B. Durham ◽  
D. J. Weidner ◽  
S.-i. Karato ◽  
Y. Wang
Keyword(s):  
High Pressure ◽  
New Developments

Design of an Automatic Device for Cleaning Cellular Evaporator

2014 ◽  
Vol 494-495 ◽  
pp. 1012-1015
Author(s):  
Zhong Min Wang ◽  
Xin Xin Ji ◽  
Jun Ma
Keyword(s):  
High Pressure ◽  
Hydraulic System ◽  
Automatic Device ◽  
Water Jet ◽  
Numerical Control ◽  
Cleaning Device ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Supporting Frame ◽  
Generating System

. An automatic cleaning device used for cleaning cellular evaporator in sugar factory is designed, which uses high-pressure water jet to clean fouls. The device includes supporting frame, linear guides, sending and closing pipes mechanism, hydraulic system and high-pressure water jet generating system, etc. Actions of sending and closing pipes as well as other cleaning operations are controlled by a numerical control system. Experiments show this device can replace manual cleaning for achieving automatic cleaning to a cellular evaporator, and it significantly increases cleaning efficiencies.

Sign in / Sign up

Export Citation Format

Share Document