Danfoss MPE 70, Руководство по эксплуатации

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Data sheet | MPE 70 Energy recovery device
33
180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
A: Flexible coupling
B: Bell housing
C: Motor shaft
min. 3 - 5 mm air space
A B C
The MPE is attached to the electric motor by a
bellhousing. The bellhousing centers the shafts
of motor and MPE and additionally serve as
coupling protection. The shafts are connected
through a flexible jaw coupling.
7.4 Design Configuration for Manifolds
7.5 Filtration
7.3 Connection to system
• The MPE connection ports are designed for
hard piping. Danfoss recommends to follow
the Guideline 180R9367 - Pipe connection.
7.2 Mounting MPE to motor
When setting up MPE70 in parallel Danfoss
recommends U flow for manifold designs and a
maximum flow velocity of 3,8 m/s.
The MPE 70 speed is not affected by the flow but
it is preferred to have a even flow distribution
among the MPE70 units and investigations done
by Danfoss shows that Z-Flow requires a lower
flow velocity to get an even distribution.
If for some reason Z flow is selected Danfoss
recommends to reduce the flow velocity to 2 m/s
Below sketch shows the concept of U-Flow
design and Z flow design
MPE 70 MPE 70 MPE 70
Z- Flow
MPE 70 MPE 70 MPE 70
U- Flow
7.6 Noise
High quality water extends the service life of the
whole system.
Water to the MPE 70 must be filtered to 5 μm
nominal, using melt-blown depth filter with a
proven efficiency of min. 85%. Consult Danfoss
for correct choice of filter.
It is important when selecting the filter and filter
housing to ensure good cartridge end sealings.
As the various filters on the market differ greatly,
Danfoss High Pressure Pumps recommends
using cartridges with consistent, reliable
performance and high efficiency and where
fibres are blown continuously onto a central
support core. Danfoss High-pressure pumps
does not recommend cartridges requiring any
type of binders or resins.
Since the MPE is mounted on a bell housing and
electric motor, the noise level should be
determined for a complete system.
It is recommended to use multiple Victaulic
clamps to avoid structural noise.
The noise level is influenced by:
Speed:
• High rpm makes more fluid/structure-borne
pulsations/vibrations than low rpm due to
higher frequency.
Pressure:
• High pressure makes more noise than low
pressure.
Connections to MPE:
• Variable frequency drives (VFD):
Motors regulated by VFDs can increase noise
level if the VFD does not have the right
settings.