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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCŢII DE MAŞINI
RESEARCH ON HYDRAULICALLY SYSTEMS WHICH
MOVE HEAVY MASSES ON SMALL DISTANCES
WITH LOWER FREQUENCIES
BY
CONSTANTIN CHIRIȚĂ, ADRIAN HANGANU
and DANIEL CALFA
Abstract. In this paper the authors try to present the mathematical models,
static and dynamic, useful for designing of hydraulically systems which move
heavy masses on small distances with lover frequencies. In the last time
mathematical modeling represents an obligatory step in the designing process of
the new products. In this paper are presented the results of the theoretical
simulation in concordance with the experimental results. The aim is to show the
realistic part of the theoretical simulation of one system designed to move a heavy
owen, 200 t, on a short distances, 50 mm, with low frequency, one complete cycle
in 24 hours.
Key words: research, modeling, simulation, data acquisition.
1. Introduction
To move heavy masses on small distances with lover frequencies the author
recommends one of the following hydraulic charts, see Fig. 1.
In both variants the working tool is the linear hydraulic engine CH, with the
active surface S and volume Vo, which moves the mass M.
For the first variant the step of the move is programmed at the level of the
pump, through the volume/course V. We will admit that for a complete course
the pump send to the hydraulic engine the oil volume V. The oil rich the pump
through the orifices A and B.
In the case of the second variant the flow regulator RD controlled the oil
flow, independent to the working pressure for a specific time, when the
distributing valve is on. The quantity of oil which enters in to the linear
hydraulic engine is controlled in the time by the time stepping system C (t).