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The
object of the laboratory:
In this laboratory research is performed in the field of hydrostatic
transmission, in order to optimize them with a view to functional
and energetic efficiency.
Also, the laboratory performs a range of verification and functional
tests, static and dynamic, in accordance with:
standard SR ISO 4409:1999-Fluid power - Pumps, motors, and volume
variating devices – determination of functional parameters;
standard SR EN 61298-4:2000-Measuring and control of industrial
processes-Methods and procedures for assessing performance;
harmonized European standard SR EN 982/2001 SR: 2001 - Security
of equipment - Requirements related to the hydraulic and pneumatic
actuation systems and their components
Fields of proficiency:
The laboratory is proficient in the field of rotating hydrostatic
transmission, with or without recovery systems for energy, which
are included in fixed equipment (industrial) and mobile equipment
(hauled vehicles and motor vehicles), including their subsystems,
for which the following verification and functional tests are performed
:
verification and functional tests, static and dynamic;
simulations of specific schemes of work for various equipments;
tests for determining performance parameters of various sub-components
of the systems / equipment that use a hydrostatic transmission for
conveyance of actuation or propulsion power.
The
laboratory infrastructure:
Laboratory of hydrostatic transmission has an appropriate space,
specially arranged to run in good condition its specific activities.
The installation of lighting and air conditioning installation ensure
good working conditions for the operating staff.
Sources of electricity, the voltage of 220 V and 380 V, supplies
power for the hydrostatic transmission testing stands in the laboratory,
and various appliances, devices and hydraulic blocks, filtration
groups, etc.
Presenting
the testing stand for hydrostatic transmission and systems to recover
energy
The solution adopted for the testing stand for hydrostatic transmission
and systems to recover energy, has been a simulation of working,
starting and braking schemes for motor vehicles, based on electro
hydraulic actuation equipment.
The testing stand consists of the following parts:
the testing unit, composed of a load device, hydraulic machine and
a torque and speed transducer to simulate the testing regimes;
the hydraulic actuation block, with a subsystem for storage and
conditioning the working fluid, consisting of an oil tank equipped
with temperature control device, a pumping group, actuation pump
and hydraulic blocks;
the acceleration unit, composed of a hydraulic motor, torque transducer
and an electro pump with variable speed, which form a simulation
subsystem engine thermal actuation;
transmission shaft, which makes a mechanical connection between
the two simulated actuation systems, the thermal system and the
hydraulic one;
the subsystem for accumulation fluid under pressure, composed of
two hydro pneumatic accumulators;
electronic and automation equipment of the stand, composed of electrical
control subsystem for the operation and testing schemes;
The
technical characteristics of the testing stand
- Maximum working pressure ............................................................
250 bar
- Cylinder capacity of hydraulic machine ..........................................
0 +45 ccm / rev
- Cylinder capacity of load pump .............................................
............. 63 ccm / rev
- Cylinder capacity of geared hydraulic motor ...................................
45 ccm / rev
- Cylinder capacity of actuation pump .............................................
.. 8.2 ccm / rev
- Working environment ..................................................................
hydraulic oil H46
- Control / supply voltage........................................................
24 Vdc / 220/380 Vac
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