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Инженерный журнал: наука и инновации
# 7·2017 11
Determination of the law of control pressure change over
the valves of a pneumatically operated micropump
© V.A. Petrov
1
, T.N. Gerasimenko
2
, O.V. Kindeeva
1
, A.I. Khaustov
1
1
Moscow Aviation Institute (National Research University), Моscow, 125080, Russia
2
SRC “Bioclinicum”, Moscow, 115088, Russia
The purpose of this research was to carry out mathematical simulation of a membrane
pneumatically operated micropump. Such pumps are widely used to circulate the medium
in microfluidic devices applied in various fields of science and technology. A micropump
consists of three thin-walled membranes: two valves and one membrane of the working
chamber. The pump is operated according to a special algorithm by alternating supply of
compressed and vacuum air to the membranes of the valves and the working chamber
from the control unit. Definition of a new pressure value over the valves and the working
chamber is not instantaneous, so a limitation is imposed on the switching frequency
of the valves and the working chamber. The purpose of the work is to determine the law of
pressure change over the membranes and to find a limitation on the frequency of their
switching. Dependences describing the increase and decrease in the pressure value above the
working chamber are obtained and tested experimentally on a specially designed stand.
The results of mathematical modeling are in good agreement with the experimental data.
Keywords:
micropump, membrane, microfluidic device, pneumatic drive, transient pro-
cess
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