Carmen-Anca SAFTA


32-40 METODE EXPERIMENTALE PENTRU DETERMINAREA REZISTENȚEI LA EROZIUNE ABRAZIVĂ A MATERIALELOR FOLOSITE ÎN FABRICAȚIA MAȘINILOR HIDRAULICE

EXPERIMENTAL METHODS FOR TESTING OF THE ABRASIVE EROSION RESISTANT MATERIALS USED IN HYDRAULIC MACHINES MANUFACTURING

 

In the paper are reviewed the known methods applied to test the resistance of a metalic material to abrasive erosion with application to hydraulic machines espacially hydraulic pumps. Are mentioned the methods in the conformity with international standards. Article highlights the method which can be used to test and to measure the abrasive resistance of the materials used in the manufacturing of a hydraulic machine.

 

Keywords: abrasion erosion, test, wear

Cuvinte cheie: eroziune abrazivă, încercare, uzură

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32-17 CONSIDERAȚII HIDRAULICE ÎN PROIECTAREA SCĂRILOR DE PEȘTI

HYDRAULIC APPROACH OF FISH LEDDER DESIGN

 

The paper presents the design restrictions of fish ladders mentioned in the literature and highlights through an example of how sizing calculation of these structures taking into account the hydraulic flow regime.

 

Keywords: weir, fish ladder, critical flow regime, Froude number

Cuvinte cheie: deversor, scară de pești, regim critic de curgere, număr Froude

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32-13 PROBLEME DE MENTENANŢĂ LA TURBINELE EOLIENE CU AX ORIZONTAL

MAINTENANCE ISSUES OF

HORIZONTAL AXIS WIND TURBINE

 

This paper presents the concepts of maintenance and especially the maintenance of onshore wind turbines. There are several types of maintenance, each of them trying to reduce the costs with repairs of wind turbine and also the losses of energy production.

 

Keywords: maintenance, wind turbines

Cuvinte cheie: mentenanță, turbine eoliene

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32-9 AVANTAJELE, ERORILE ȘI LIMITELE TERMOGRAFIERII ÎN INFRAROȘU UTILIZATĂ LA MENTENANȚA SISTEMELOR DE ACȚIONARE HIDRAULICĂ

THE ADVANTAGES, ERRORS AND LIMITATIONS OF INFRARED THERMOGRAPHY METHOD USED TO THE MAINTENANCE OF HYDRAULIC DRIVE SYSTEMS

 

The subject of the article is to discuss the advantages, errors and limitations of infrared thermography which can be used as a non-invasive modern method of diagnosis even in industrial applications. The method of infrared thermography diagnosis is proposed to be applied in the preventive maintenance of hydraulic drive systems.

 

Keywords: infrared thermography, preventive maintenance, hydraulic actuators, errors, calibration

Cuvinte cheie: termografiere în infraroșu, mentenanţă preventivă, acţionări hidraulice, erori, calibrare

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30-70 FENOMENUL DE COLMATARE LA PASAJ DE PEȘTI

THE FISH PASSAGE SILTING PHENOMENON
The paper presents the structure and the hydraulic behavior of a new
type of fish way. The SERB fish passage has four chambers and a cylindrical
shape inside. The chambers are limited by mobile walls with orifices pass for
aquatic organism migration. Results regarding the silt of the fish way are
presented.
Keywords: fish way, design, silting
Cuvinte cheie: scări de pești, proiectare, colmatare

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29-49 MATERIALE SPECIFICE FABRICAȚIEI MAȘINILOR HIDRAULICE ȘI COMPORTAREA LOR LA FENOMENUL DE EROZIUNE

SPECIFIC MATERIALS USED IN MANUFACTURING
HYDRAULIC TURBINES AND THEIR BEHAVIOR TO EROSION
The goal of the paper is regarding the alloy materials used in the
manufacturing of hydraulic machines and how the process of corrosion has
influenced these materials. The mechanism of silt erosion is discussed and are
compared the effects of erosion and cavitational phenomena.
Keyword: corrosio, erosion abrasiv, hydraulic machine, stainless steel
Cuvinte cheie: coroziune, eroziune abrazivă, masini hidraulice, oțeluri
inoxidabile

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29-48 PROBLEME DE MENTENANŢĂ SPECIFICE SISTEMELOR DE ACŢIONARE HIDRAULICĂ

SPECIFIC ISSUES FOR MAINTENANCE OF
HYDRAULIC DRIVE SYSTEMS
This paper presents the concepts of maintenance in the light of ISO’s
standards and EU directives implemented in Romania after the year 2007, in
the industrial field, with reference to the hydraulic drive systems. The
maintenance of these systems can only find a practical solution in accordance
with the international standards and European directives mentioned above.
Keywords: tree maintenance, total productive maintenance, hydraulic
actuators, standards
Cuvinte cheie: arbore mentenanță, mentenanţă productivă totală,
acţionări hidraulice, standarde

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