Study of Hydraulic System Component Storage with a Rust Inhibited Barium Free Development Hydraulic Fluid Candidate

2006 ◽  
Author(s):  
Lois J. Gschwender ◽  
Angie Campo ◽  
Carl E. Snyder ◽  
Shashi K. Sharma ◽  
Tim Jenney ◽  
...  
Keyword(s):  
Hydraulic System ◽  
System Component ◽  
Hydraulic Fluid ◽  
Free Development

Ensuring the Reliability of an Aircraft Engine Hydraulic System

2014 ◽  
Vol 616 ◽  
pp. 126-134 ◽  
Author(s):  
Janka Mihalčová ◽  
Peter Šmeringai
Keyword(s):  
Hydraulic System ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Aircraft Engine ◽  
Hydraulic Fluid ◽  
Aircraft Engines ◽  
Ftir Analysis ◽  
Physical Chemical ◽  
Hydraulic Fluids ◽  
Degradation Degree

The article deals with the issue of ensuring the reliability of aircraft engines operation via hydraulic fluids properties monitoring. There are presented the results of the hydraulic fluid Aero Shell Fluid 41 (ASF 41) properties evaluation in the hydraulic system of a double-flow turbosupercharged aircraft engine AI-25TL. In the hydraulic fluid, there were observed the quantity and distribution of mechanical particles according to their size in accordance with the ISO Cleanliness Code, ISO 4406.There was also determined kinematic viscosity according to the standard EN ISO 3104+AC. FTIR analysis of the infrared spectrum was used to determine the degradation degree of the hydraulic fluid physical-chemical properties.

scholarly journals Bulkhead Door – Critical Evacuation States

2017 ◽  
Vol 24 (1) ◽  
pp. 66-71 ◽  
Author(s):  
Józef Flizikowski ◽  
Weronika Kruszelnicka ◽  
Mirosław Michałowski ◽  
Grzegorz Szala ◽  
Andrzej Tomporowski
Keyword(s):  
Present Article ◽  
Hydraulic System ◽  
Hydraulic Fluid ◽  
Critical States ◽  
High Level

Abstract The article is a preliminary to a modification concept of the sliding watertight bulkhead door used on ships and vessels. Hydraulic or electro-hydraulic drives used to move these doors require complicated and extended pressure installations with large amounts of hydraulic fluid. Well-known operational drawbacks of these installations include high level of noise and possibility of various leaks in the hydraulic system. Being the first in a series, the present article describes and analyses critical states which can take place during evacuation of people through openings in the watertight bulkhead doors on seagoing ships and vessels.

scholarly journals Research of Biodegradable Fluid Impacts on Operation of Tractor Hydraulic System

2017 ◽  
Vol 20 (2) ◽  
pp. 42-45 ◽  
Author(s):  
Zdenko Tkáč ◽  
Štefan Čorňák ◽  
Vladimír Cviklovič ◽  
Ján Kosiba ◽  
Josef Glos ◽  
...  
Keyword(s):  
Hydraulic System ◽  
Acid Number ◽  
Hydraulic Fluid ◽  
Spectroscopy Analysis ◽  
Total Acid ◽  
Transmission Systems ◽  
Transmission Oil ◽  
Total Acid Number ◽  
Transmission Fluid ◽  
Agricultural Tractors

Abstract This paper is focused on the impacts of the biodegradable hydraulic and transmission fluid (Universal Tractor Transmission Oil) on operation of tractor hydraulic and transmission systems. The fluid was used in the hydraulic and transmission systems of a Zetor Proxima 6321 tractor. Fluid samples were taken from the Zetor Proxima 6321 tractor at intervals of 250 engine hours. These samples were subjected to an infrared spectroscopy analysis in order to measure the total acid number and perform the ferrography analysis. This paper proves minimal impacts of the biodegradable hydraulic fluid on operation of the Zetor Proxima 6321 tractor. The biodegradable fluid meets the requirements for the operation of agricultural tractors in terms of low impacts on the wear of hydraulic components.

Hydraulic Fluid Mathematical Modeling

2013 ◽  
Vol 432 ◽  
pp. 127-132
Author(s):  
Pei Cheng Shi ◽  
Yang Min Sun
Keyword(s):  
Hydraulic System ◽  
Fluid Pressure ◽  
Mathematical Expression ◽  
Effective Density ◽  
Hydraulic Fluid ◽  
Factors Affecting ◽  
Air Content ◽  
Linear Behavior ◽  
Study Results ◽  
Non Linear

In hydraulic system, the property of hydraulic fluid will have non-linear behavior change when the temperature and pressure of fluid and the amount of dissolved and undissolved air vary, thus influencing the hydraulic system performance. The authors first studied the property of hydraulic fluid, and then constructed the mathematical expression theoretically, which shows the hydraulic fluid effective density using the fluid pressure, temperature and air content parameters. The computation simulations of the hydraulic fluid non-linear property were carried out using the simulation program based on MATLAB software. Meanwhile the key-factors affecting the hydraulic effective density and fluid bulk modulus were discussed. The study results provide computing foundation for designing quickly responsive, running steady and highly accurate hydraulic transmission system, which have important theory and engineering significance.

scholarly journals Study of Energy Efficiency Characteristics of a Hydraulic System Component

2020 ◽  
Author(s):  
Alamgir Choudhury ◽  
Prajna Paramita ◽  
Jorge Rodriguez
Keyword(s):  
Energy Efficiency ◽  
Hydraulic System ◽  
System Component

scholarly journals The importance of the electrical properties of hydraulic fluids

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Darko Lovrec ◽  
Vito Tič
Keyword(s):  
Electrical Properties ◽  
Hydraulic System ◽  
Basic Material ◽  
Hydraulic Fluid ◽  
Content Type ◽  
Mineral Oils ◽  
Ionic Fluids ◽  
Hydraulic Fluids ◽  
Conductive Properties ◽  
Degree Of Degradation

Purpose Apart from the basic material properties of liquid lubricants, such as, e.g., the viscosity and density of the hydraulic fluid, it is also important to have information regarding the electrical properties of the fluid used. The latter is closely related to the purpose, type, structure, and conditions of use of a hydraulic system, especially the powertrain design and fluid condition monitoring. The insulating capacity of the hydraulic fluid is important in cases where the electric motor of the pump is immersed in the fluid. In other cases, on the basis of changing the electrical conductive properties of the hydraulic fluid, we can refer its condition, and, on this basis, the degree of degradation. Design/methodology/approach The paper first highlights the importance of knowing the electrical properties of hydraulic fluids and then aims to compare these properties, such as the breakdown voltage of commonly used hydraulic mineral oils and newer ionic fluids suitable for use as hydraulic fluids. Findings Knowledge of this property is crucial for the design approach of modern hydraulic compact power packs. In the following, the emphasis is on the more advanced use of known electrical quantities, such as electrical conductivity and the dielectric constant of a liquid. Originality/value Based on the changes in these quantities, we have the possibility of real-time monitoring the hydraulic fluid condition, on the basis of which we judge the degree of fluid degradation and its suitability for further use.

scholarly journals Influence of differently viscous hydraulic fluid on the flow behaviour inside a hydraulic tank

2021 ◽  
Author(s):  
Ignacijo Biluš ◽  
Luka Lešnik ◽  
Luka Kevorkijan ◽  
Darko Lovrec
Keyword(s):  
Material Properties ◽  
Hydraulic System ◽  
Flow Behaviour ◽  
Hydraulic Fluid ◽  
Entire System ◽  
Flow Conditions ◽  
Lower Viscosity ◽  
Hydraulic Fluids ◽  
Detailed Simulation ◽  
The Impact

The viscosity of a hydraulic fluid is certainly one of the most important material properties of a fluid, as it affects a whole range of phenomena in the hydraulic system and the operation of the entire system. Among other things, it affects the efficiency of the hydraulic device directly. Thus, the development of hydraulic fluids goes in the direction of fluids with lower viscosity, which, in turn, results in different flow behaviour and processes inside the hydraulic tank. The paper presents the results of a study of the flow conditions in a small hydraulic tank for cases of different fluid viscosities. The results were obtained based on a detailed simulation of conditions inside the tank. Apart from the impact of the changed flow conditions, the lower viscosity of the liquid also influences the elimination of solid contaminants and air.

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