Hitachi G 18SR, Технические данные и руководство по обслуживанию

Страница: 5 / 34

--- 2 ---
4-1. Class-top Overload Durability
The Models G 18SR, G 18SRU, G 23SR and G 23SRU provide excellent overload durability in common with the
current models. Figure 1 shows the comparison of overload durability when the stator coil temperature rise is
200 û K using the Model G 23SR as the reference. As is evident from this, the Models G 18SR, G 18SRU,
G 23SR and G 23SRU are superior to the competitors in overload durability.
Fig. 2
Fig. 1
4-2. Wear Resistance of Armature Coil
Both ends of the armature coil are sealed with heat-resistant adhesive in addition to varnish treatment to minimize
wear of the armature coil caused by dust.
Fig. 3
4-3. Dust-proof Ball Bearing thanks to the Labyrinth Construction
The ball bearing retainers at both sides of the armature have a labyrinth construction to make the ball bearings
dust-proof.
Ball bearing (6301VVCM)
Commutator
Coating of heat-resistant adhesive
Fan
Armature shaft
Bearing cover (A)
Labyrinth
Housing
Ball bearing
(6000VVCM)
Dust seal
Bearing bushing
100
50 0
G 18SR/G 23SR
G 18SRU/G 23SRU
C
B
Labyrinth