Siemens Flender H2NV Series - Protection against Dry Running; Taconite Seal

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BA 5060 EN 04/2011
5.6.3 Protection against dry running
In order to safely avoid dry running of the shaft sealing ring arranged at the top, a grease filling (4) and
a ring (3) are provided above the shaft-sealing ring (2). In such case, a shaft-sealing ring with no additional
dust lip is applied. The ring (3) is fitted with a set screw (1) on the input shaft and prevents grease from
escaping upwards. The ring (3) rotates contactless in the housing cover, during operation.
2
1
4
3
Fig. 10: Protection against dry running
1 Set screw 3 Ring
2 Radial shaftsealing ring 4 Grease filling
5.6.4 Taconite seal
Taconite seals have been specially developed for use in a dusty environment. The
penetration of dust is prevented by a combination of three sealing elements
(radial shaftsealing ring, lamellar seal and greasecharged labyrinth seal).
1
2
3
4
Fig. 11: Taconite seal
1 Radial shaftsealing ring 3 Greasecharged labyrinth seal, rechargeable
2 Lamellar seal 4 Flat grease nipple AM10x1 to DIN 3404
A detailed view of the gear unit can be obtained from the drawings in the gearunit documentation.
The specified frequencies must be observed (see section 10, "Maintenance and
repair") for recharging the labyrinth seals with grease.