2 / 8
Fig. 1. Russian HVMP developed in cooperation with BMSTU
optimized HVMP: TMNG-450 (ТМНГ-450), TMNG-500 (ТМНГ-500),
TMNG-600XC (ТМНГ-600XC) (chemically stable modification),
TMNG-1000 (ТМНГ-1000), and TMNG-100 (ТМНГ-100) over only
two years period (Fig. 1).
TMNG-100 pump deserves special attention. This is the world’s only
absolutely superclean HVMP with the atmospheric pumping pressure. This
pump is unique at present.
HVMP calculation programs developed at BMSTU enable multipara-
metric and multicriterial optimization of their features and characteristics,
which results in a significant scope for designing efficient and up-to-date
HVMPs [3]. This also allows the designers to fulfil the pumps potential.
At present, researchers are focusing particularly on formalizing the
structural optimization of objects being designed. Unfortunately, this
problem is currently too complex to be solved in the case of HVMP.
The conceptual foundation developed at BMSTU suggests selecting
the perspective flow channel layouts according to a number of some
main trends [3]. One of these trends considering the HVMP flow channel
structure aims at improving the pump rotor wheels.
The following TVMP design was suggested in [3] (Fig. 2,
a
): the rotor
wheels with two-tier passages are placed on the pressure side of the flow
channel with mirror-image inclined passages. It directs the gas flow in the
desired way (see Fig. 2,
a
). There are open-end holes in the wheel hub
to divert the gas on the pressure side. In spite of the certain technical
difficulties, it should be noted that the pump dimensions are reduced while
fulfilling the requirements for the increased pressure conditions. The flow
channel construction with the inclined frontal radial blades is designed for
the same purpose (Fig. 2,
b
). It enables radial gas to flow alternately to
the axis and away from it. This leads to increasing the pressure by some
extended channels within the reduced TMP flow channel.
4
ISSN 0236-3941. HERALD of the BMSTU. Series Mechanical Engineering. 2014. No. 5