Revista HIDRAULICA | HIDRAULICA Magazine

ISSN 2343–7707 ; ISSN-L 1453-7303

HIDRAULICA Magazine No. 3 / 2014


Hidraulica no.3/2014


EDITORIAL

WHY HERVEX?
Petrin DRUMEA
Manager of Publication

From 5th to 7th of November 2014 in Valcea county, at Calimanesti-Caciulata, will be organized the 21st edition of the International Conference and Exhibition of Hydraulics and Pneumatics “HERVEX”. Since 2013 a prestigious research entity in Poland (KOMAG Institute of Mining Technology in Gliwice) joins the traditional organizers.….(read more)


THE EXPERIMENTAL VERIFICATION OF EFFECT OF LUBRICATION ON COEFFICIENT OF FRICTION IN ENDOPROSTHESIS OF HIP JOINT
Authors: Andrea HARINGOVÁ, Karol STRAČÁR, Karol PRIKKEL

The endoprosthesis of hip joint has overall lifetime up to 20 years. After this period the patient has to submit the revision operation. The main problem of the failure of endoprosthesis of hip joint are debris that comes from direct contact of head and socket pad and so called dry friction. The paper deals with effect of additional lubricant on the value of coefficient of friction in endoprosthesis of hip joint. As the testing fluid was selected the replacement of synovial fluid: solution of hyaluronic acid….(read more)


THE USE OF  BIOCHAR AS A MEANS OF SOIL REGENERATION
Authors: Sava ANGHEL, Alina Iolanda POPESCU

Intensive agriculture exploitations led to pronounced degradation of soil by altering soil structure, affecting natural circuits of water, carbon and nitrogen by presence of poisonous substances from pesticides family, of residues of harmful substances resulted by conducting crop treatments. One way to remedy these soils, used worldwide, is the use of activated carbon as the biochar. It copies the natural phenomenon of vegetation fires after which due to the resulting carbon is gets to soil regeneration. Aim of the study is to increase production by regenerating the soil as a result of using biochar..(read more)


ELECTRONIC SCREENING
Authors: Justinian Laviniu CÎRSTEA, Dorel STOICA

The article deals with the electronic screening of the commercial vehicles, which can be done using mainline screening and ramp screening. Mainline screening allows vehicles to be cleared without pulling into the station and has the advantages of a reduced traffic volume entering the station facility and of a minimized delay for safe and legal vehicles, but also has the disadvantage that the in-road equipment repairs on the mainline can be very costly and disruptive….(read more)


TILLER HYDROSTATIC TRANSMISSION
Authors: Gheorghe IVAN, Radu CIUPERCA, Ioan GANEA

The article relates to a hydrostatic transmission intended for the tillers equipped with internal combustion engines for continuous transmission of motion and power of the drive wheels or to a device for digging soil. The state of the art transmission tillers operated internal combustion engines using classical scheme consists of clutch, gearbox, control systems thereof etc. Chaining these elements presents disadvantages …(read more)


RAINFALL INDICES IN THE CITY OF BUCHAREST
Author: Carmen Otilia RUSĂNESCU

In this paper is analyzed rainfall regime with rainfall indices: the amount of rainfall, conventional balance of humidity (K), emberger rainfall coefficient. Specific precipitation amounts are calculated analysis of the ecological factors that characterize either the period of accumulation of biologically active water horizon (XI-III) or maximum biological activity (VII-VIII). We performed conventional moisture balance. We calculated the average yearly rainfall in 2009-2012. We calculated the eco-climatic indices for the city of Bucharest,….(read more)


STUDY OF THE FLUIDIZED BED HYDRODYNAMICS FROM THE ENERGETIC BOILERS USING DIFFERENT TYPE OF SOLID PARTICLES
Authors: Daniela HOARĂ, Gheorghe LĂZĂROIU

This paper presents the determination manner of the pressure drop, the minimum fluidization velocity and the floatation velocity of the solid particles in the fluidized beds, depending on the type of material used and on the size of the solid particles, making a comparison between the theoretical and experimentally determinations….(read more)


GENERAL METHODOLOGY OF WORKING WITH HVOF  INTEGRATED TECHNOLOGICAL SYSTEM
Authors: Valeriu AVRAMESCU, Luminita Elena OLTEANU,  Loredana Theodora PAUN, Raluca Magdalena NITA,  Daniel BOBE, Sebastian ROSULESCU, Marius MANEA

Article “General methodology of working with HVOF integrated technological system” aims to present some information about the thermal spraying process and all major stages of working with the integrated technological system for thermal spraying, created in the SC ICTCM -Mechanical Engineering and Research Institute, both in the case of metallic coatings for new pieces and general methodology for working with this system…(read more)


CABIN HEAT REMOVAL FROM PARKED CARS
Authors: Adrian CIOCANEA, Dorin Laurentiu BURETEA

The paper presents a solution for designing an intelligent and modular solar energy system for heat removal from parked car cabins. We propose a ventilation system composed of two pairs of cross flow fans, one placed under the car roof cabin between the steel plate and the indoor insulation and the second under the rear shelf of the back seats. The cabin was exposed to the sun radiation…(read more)


INTEGRATED TECHNOLOGICAL SYSTEM FOR THERMAL SPRAYING BY HVOF PROCESS
Authors: Theodora Loredana PAUN, Valeriu AVRAMESCU, Raluca Magdalena NITA, Daniel BOBE, Sebastian ROSULESCU,  Elena Luminita OLTEANU, Marius MANEA

The paper “Integrated Technological System for thermal spraying by HVOF process” presents technological system aims, system that includes both technological equipment and laboratory equipment. It can thus perform applied research to achieve high strength metal coatings, thermal, corrosion on materials used in both industrial and medical applications using HVOF process. It is also possible to create the conditions of market access…(read more)


 THE PROCEDURE FOR DRYING PLANT PRODUCTS IN CONVECTIVE DRYERS
Authors: Iulian – Cezar GIRLEANU, Gabriela MATACHE

This paper shows the advantages of using convective dryers and their performance in terms of energy. These are meant for dehydration of vegetal products, in line with the global trend concerning conservation through the thermohydric technology of enzyme inactivation(dehydration). In the paper two concepts are promoted which are strictly up-to-date in the present context…(read more)

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