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Description
3.1 Comparison of IEC and GOST (D47) standards
Roller-contact bearings
The machines are equipped with different types of rolling-contact bearings depending on the
version and the operating conditions described in the order. The different types are listed on
the lubricant plate of the machine. In converter operation an insulated bearing is usually
installed on the non-drive end. The following roller-contact bearing variants are available:
Table 3-3
Version
Horizontal type of construc‐
tion, coupling output
Vertical type of construc‐
tion, coupling operation
Rolling-contact bearing design for "Increased degree of protection" (option)
Improved sealing of the bearing units to prevent dust and water from getting in can be achieved
by positioning a grease chamber ahead of the actual bearing unit. Although the same grease
is used in both cases for reasons of convenience, a distinction is made here between
"lubricating grease" and "sealing grease" because of their different functions.
Layout
The spent lubricating grease collects in the space between the bearing housing and the outer
bearing cap. The latter also forms the sealing grease chamber with the labyrinth sealing ring
(optional). The second lubricating nipple containing the grease duct for pressing in the sealing
grease is also located in the outer bearing cap. The chamber is sealed off from the space
where the lubricating grease collects by a V-ring or a V-ring and felt ring combination which
prevents the sealing grease in the chamber from penetrating into the lubricating grease
collecting space. During operation, the sealing grease in the chamber slowly runs out via the
labyrinth and seals it, additionally removing dust from inside and around the outside of the
labyrinth ring.
Terminal box
The terminal box is positioned on the side of the machine. It is fixed to the machine and cannot
be exchanged.
Supplementary devices
Depending on the order, various supplementary devices can be installed or mounted. These
include sensors for bearing temperature monitoring or winding monitoring, for example.
22
Rolling-contact bearing variants
Rolling-contact bearing
● Drive end: Deep-groove ball bearing as a fixed bearing,
● Non-drive end: Deep-groove ball bearing as a floating bearing with
axial compression springs
● Drive end: Pairing of angular-contact ball bearing / deep-groove ball
bearing as a fixed bearing
● Non-drive end: Deep-groove ball bearing as a floating bearing with
axial compression springs
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017
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