The rear axial bearing is mounted in the hub for the inner magnetic rotor, and the front axial bearing is actually part of the circulation pump supplying lubrication and cooling for the magnetic drive.
Materials rotor bearing assembly
Metal parts: | 1.4460 / duplex steel |
Shaft sleeve: | Silicon carbide |
Axial bearing faces: | Silicon carbide |
Radial bearing bushes: | Option (Q) silicon carbide |
| Option (C) carbon |
3.16.3 Circulation pump
To ensure proper lubrication of the rotor bearings and cooling of the magnetic coupling a circulation pump is providing a controlled flow over the magnetic drive. The liquid is flowing from the discharge side of the pump via holes and grooves in the bearing assembly and the magnetic drive back to the suction side of the pump. This circulation pump is designed as an internal gear pump where the drive gear, integrated in the front axial bearing is driving a disk rotor which is rotating in an insert, situated between rotor and intermediate cover. The insert and the complete rotor bearing assembly are mounted on the intermediate cover.
Shaft nut
Rear axial bearing +
Hub inner rotor
Intermediate cover
Disk rotor
Insert
Front axial bearing +
Gear of circulation pump
| Rotor shaft |
Material circulation pump parts | |
Pump gear: | 1.4460 duplex steel |
Disk rotor: | PEEK |
Insert: | 1.4460 duplex steel |
3.16.4 Sealing rings and gaskets
The magnetic drive replaces a dynamic shaft sealing, so there are only static seals on TopGear MAG pumps. The intermediate cover, separation can and pump cover are sealed with
Max. allowable temperature for FPM (Fluorcarbon) = 200 °C
The topcover/safety relief valve is sealed with a graphite gasket and following sealing rings are used to seal plugs:
Cast iron pump casing parts: Stainless steel casing parts:
Steel sealing rings with
24 | A.0500.551 – |
