Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Olof Calonius"'
Publikováno v:
Energies, Vol 12, Iss 8, p 1538 (2019)
In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The
Externí odkaz:
https://doaj.org/article/5e39038b221140dcb9a8e268e0a48a25
Autor:
Robert Hermansson, Ville Närvänen, Jyrki Kajaste, Olof Calonius, Matti Pietola, Petri Kuosmanen
Publikováno v:
ASME/BATH 2021 Symposium on Fluid Power and Motion Control.
In this research the energy efficiency of a pump controlled direct driven hydraulic (DDH) system is experimentally tested and analyzed. The test bench uses two cylinders’ cross-connection to rotate the middle joint of the 5-meter-long pivot arm whi
Publikováno v:
ASME/BATH 2019 Symposium on Fluid Power and Motion Control.
In hydraulic systems, the presence of foreign material in the system oil accounts for the majority of system troubles due to mechanical wear of components, sticking of different parts etc. Therefore, it is essential to maintain an adequate cleanlines
Publikováno v:
Energies; Volume 12; Issue 8; Pages: 1538
In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The
Publikováno v:
Varis, T, Suhonen, T, Calonius, O, Cuban, J & Pietola, M 2016, ' Optimization of HVOF Cr3C2-NiCr coating for increased fatigue performance ', Surface and Coatings Technology, vol. 305, pp. 123-131 . https://doi.org/10.1016/j.surfcoat.2016.08.012
Thermally sprayed coatings are strong candidates to be used for replacement of hard chromium - process which is regarded as an environmental risk - in many sliding surfaces for engineering applications such as hydraulic cylinders and aircraft landing
Publikováno v:
BATH/ASME 2018 Symposium on Fluid Power and Motion Control.
The ever-tightening government-enforced regulations for more energy efficient and less polluting machines and the simultaneous fast development of electric drives have caused hydraulic systems to lose ground to electric drives. One promising solution
Publikováno v:
2018 Global Fluid Power Society PhD Symposium (GFPS).
Direct Driven Hydraulic (DDH) systems, which are characterized by a closed circuit type and a speed-controlled pump, offer a possibility of reaching higher energy efficiencies compared to the traditional open circuit type valve-controlled systems, an
Publikováno v:
2018 Global Fluid Power Society PhD Symposium (GFPS).
This paper presents the experimental results of the study performed with an electrified small sized excavator, a 1.1- tonne JCB Micro, equipped with conventional hydraulics. The highlighted points in this study are the overall energy balance of the e
Publikováno v:
Tampere University
In water hydraulic systems, requirements for better energy efficiency call for the development of variable displacement axial piston pumps. Most axial piston units utilizing water as pressure medium lack the possibility of adjusting the swash plate t
Autor:
Matti Pietola, Olof Calonius
Publikováno v:
Proceedings of the JFPS International Symposium on Fluid Power. 2005:328-333
Seals are generally inexpensive machine elements, but in industrial fluid power systems the costs of sealing failure can be much higher than the cost of replacing the damaged seal due to, e.g., costs related to process downtime. Consequently, careful