VARISCO SaxMag V Series, Руководство по эксплуатации

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OPERATING MANUAL - SAXMAG V
Page 17
4.3.1.1 Internal rotor
The internal rotor is mounted on the pump drive shaft. The magnets are pasted on the rotor outside and
hermetically sealed in to protect them from chemical attack.
4.3.1.2 External rotor
The external rotor with the coupling hub is mounted on the motor shaft. The magnets sit on its inside.
The magnets actually fitted are provided as a function of the torque to be transmitted by the coupling.
4.3.1.3 Magnets
The magnets consist of high-grade samarium cobalt (SmCo). Outstanding features are high magnetic
energy density and low unit volume as well as a high field service temperature limit. Given the
magnets' limited chemical resistance the internal rotor is encapsulated (i.e., hermetically sealed).
4.3.2 Bearings
The drive-end shaft is supported in deep groove ball bearings which, featuring C3 bearing clearance and
high-temperature grease packing, have sealing washers on either side.
The pump-end shaft is supported in hydrodynamic carbide plain bearings which are lubricated by the
pumped fluid.
4.3.3 Materials
Pump component Materials
Pump casing S.S. Grey iron
Shaft Ceramics-coated S.S.
Plain bearings Carbide / Bronze
External magnet Samarium cobalt (Sm2Co17)
Internal magnet Samarium cobalt (Sm2Co17)
Containment shell 1.4571 S.S.
Radial shaft seal Perbunan (temperature-resistant up to 100°C)
Gaskets between containment
shell and bearing housing
Centellen / PTFE
4.3.4 Monitoring
Depending on the unit's operational reliability and availability requirements, it is recommended that
appropriate monitoring equipment be fitted.
On request we can supply equipment for the following functions:
-
Level monitoring to prevent running dry;
-
Temperature monitoring on the containment shell to detect overtemperature inside the
containment shell (must be fitted as called for in the ATEX certification);
-
Pressure monitoring;
-
Motor monitoring (current consumption).