Results 71 to 80 of about 102,186 (212)

Magnetorheological Safety Valve and Control Strategies for Hydraulic Supports

open access: yesApplied Sciences
With the continuous increase in coal mining depth, rock burst occurs frequently, which poses a serious threat to coal mine safety production. As the key equipment to ensure the stability of coal mine working face, the response characteristics of the ...
Haodang Li   +6 more
doaj   +1 more source

Analysis of the jet pipe electro-hydraulic servo valve with finite element methods

open access: yesMATEC Web of Conferences, 2018
The dynamic characteristics analysis about the jet pipe electro-hydraulic servo valve based on experience and mathematical derivation was difficult and not so precise.
Kaiyu Zhao   +4 more
doaj   +1 more source

Study on Friction and Wear Characteristics of Aluminum Alloy Hydraulic Valve Body and Its Antiwear Mechanism

open access: yesArchives of Foundry Engineering, 2017
In order for the working status of the aluminum alloyed hydraulic valve body to be controlled in actual conditions, a new friction and wear design device was designed for the cast iron and aluminum alloyed valve bodies comparison under the same ...
Rong Li   +4 more
doaj   +1 more source

In-cylinder flow and combustion studies in an air-assisted direct injection gasoline engine [PDF]

open access: yes, 2004
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.In-cylinder flows and CAI combustion were investigated in a single cylinder, air-assisted gasoline direct injection engine.
Leach, Ben Thomas
core  

Analysis of Sealing Performance of Special Gas Seal Thread of Downhole Safety Valve

open access: yesShiyou jixie, 2022
Downhole safety valve, as a necessary safety device, is widely used in the development of high-sulfur gas fields and offshore oil and gas fields. The thread sealing performance is one of the important elements in the research and development of downhole ...
Wang Chuanhong   +5 more
doaj  

Prior balloon valvuloplasty versus DIRECT transcatheter Aortic Valve Implantation (DIRECTAVI): study protocol for a randomized controlled trial

open access: yesTrials, 2017
Background Balloon predilatation of the aortic valve has been regarded as an essential step during the transcatheter aortic valve implantation (TAVI) procedure.
Florence Leclercq   +13 more
doaj   +1 more source

Simulation and design of optimization of magneto rheological control valve [PDF]

open access: yes, 2011
Magneto-rheological (MR) Valve is one of the devices generally used to control the speed of Hydraulic actuator using MR fluid. The performance of valve depends on the magnetic circuit design. Present study deals with a new design of MR valve.
ZAINAB BINTI AWANG NGAH
core  

A Simplified CFD Model for Simulation of the Suction Process Of Reciprocating Compressors [PDF]

open access: yes, 2012
The suction process in reciprocating compressors is strongly affected by the valve dynamics and the pulsating flow throughout the suction muffler. This paper describes a simplified computational fluid dynamics (CFD) model to simulate the flow through the
Deschamps, Cesar J.   +3 more
core   +1 more source

Fluid Loss Isolation Valve Design and Sealing Performance Study

open access: yesShiyou jixie, 2016
In the operation of multistage fracturing,well completion,production and workover,leakage is often encountered and leads to formation damage due to the failure of tool.To address the issue,the high-pressure fluid-loss isolation valve has been developed ...
Chen Shengshan   +6 more
doaj  

Computational valve plate design [PDF]

open access: yes, 2015
Axial piston machines are widely used in many industries for their designs compactness, flexibility in power transfer, variable flow rate, and high efficiencies as compared to their manufacturing costs.
Kalbfleisch, Paul K, Kalbfleisch, Paul
core   +1 more source

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