DBPapers

RESEARCH ACTIVITIES REGARDING ENERGETIC AND FUNCTIONAL ADVANTAGES OF HYDRAULIC TRANSMISSIONS

AUTHOR/S: P. DRUMEA, T.C. POPESCU, D.D. ION GUTA
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 2, 323-330 pp

ABSTRACT

This paper highlights several aspects regarding energetic and functional advantages of
hydraulic transmissions based on adjustable volumetric machines, located in their
primary and secondary sectors. To this end, numerical simulations were performed upon
hypothetic hydraulic transmissions of primary or secondary adjustment, as well as
numerical simulations and experimental research on MOOG radial piston pump type
RKP-D. This servo pump, which can operate either in closed loop of flow or in closed
loop of pressure, is appropriate for use in hydraulic transmissions of primary, secondary
or mixed adjustment.

The main method to increase energy efficiency of hydraulic transmissions (HT) is based
on automatic adjustment of capacity of volumetric machines located in their secondary
sector (motors) or/and of volumetric machines located in their primary sector (pumps).
HT of primary adjustment are based on volumetric servo pumps that automatically
adjust their capacity so that they supply constant flow to volumetric motors of constant
capacity. HT of secondary adjustment are based on the adjustment of capacity of
volumetric servo motors that are supplied at constant pressure. HT of mixed adjustment
are based on the adjustment of capacity of volumetric machines located both in primary
and secondary sectors (pumps and motors). For a certain HT that comprises adjustable
volumetric machines with incorporated electronics (for instance MOOG servo pumps) it
is necessary to know and set the parameters of the capacity adjustment laws depending
on the operation cyclogram of the system.

Keywords: LabVIEW, AMESim, hydrostatic transmissions.