26
3.8 Example of a circulating-
oil- lubrication system with flow limiter
of series SMBM-V
See Figure 9
Series SMBM-V flow limiters provide an optional switchover to
a lower volumetric flow to support the heating-up procedures
and to avoid bearing overflows with machines that are not yet
warm enough for operation.
Before start-up of the machine, the lubricant is heated inside
the oil supply unit (
1
).
The main delivery line (
2
) opens when the specified lubricant
temperature is reached.
The lubricant now flows through connected warm-up lines (
3
)
and through the return line (
4
) back to the oil supply unit (
1
).
The warm-up lines are closed once the specified lubricant
temperature has been reached (
5
) on the return line to the
reservoir.
The pump (
1
) now delivers the lubricant to the main pressure
line (
2
). From here it travels through the oil filters (
6
) to the flow
limiters (
7
) and then via downstream progressive metering
devices (
8
) or flow dividers to the lubrication points as needed.
During this process, the electrical 3/2-way changeover valve
(
9
) is first connected in such a way that the plug-in nozzle
designed for start-up operation
D
1
is actuated. This reduces the
rated volumetric flow to a lower starting flow of 25%. Once the
target lubricant temperature has been reached on the return
line to the reservoir, the electrical 3/2-way changeover valve (
9
)
is switched over to the plug-in nozzle
D
2
designed for the full
flow rate.
Lubrication points that do not require a reduction in the
starting volume ratio (to 25% of the nominal volumetric flow)
are fed with the full nominal volumetric flow. This is done by the
appropriate selection of the plug-in nozzles (without a starting
reduction ratio of 1:1 - see plug-in nozzle table Chapter 3.3 ).
Either signal transmitters (
10
), piston detectors or gear
wheel-type flow indicators with pulse sensors in connection
with monitoring devices (
11
) are used to monitor the individual
volumetric flows.
Fig. 9
Example of a circulating-oil lubrication system with SMBM-V
Table 10
Legend to Figure
9
Marking Designation
<Content>
1
Oil supply unit
2
Main pressure line
3
Warm-up line
4
Return line
5
Temperature sensor
6
Oil filter with shutoff valve
7
Flow limiter with changeover valve
8
Progressive metering device
9
Electrical changeover valve
10
Signal transmitter
11
Monitoring unit
<
IMPORTANT NOTE
Avoiding malfunctions
It is not permitted to utilize a mixture of SMBM-X
and SMBM-V on the same base plate, because
otherwise the SMBM-X flow limiter would not be
supplied with oil while the valve is positioned for
start-up operation!
Содержание SKF SMBM-V EEX
Страница 49: ...49 Fig 32 Mechanical connection options SMBM V...
Страница 61: ...61 Fig 40 Replacement of an SMBM module...
Страница 62: ...62 Fig 41 Expansion of an existing assembly to include an SMBM module...
Страница 73: ...73...
