A recent slip ring design, which is also a direct replacement for the pitch-control slip ring on GE 1.5 MW series wind turbine, comes from Moog, East Aurora, NY.
The Moog AC7008 slip ring provides direct connection to the gearbox with wire terminals in the stator and rotor-junction boxes. Each AC7008 ships with a heater installed.
The AC7008 slip ring provides reliable transmission of power and data signals for the rotating blades from the control system. The advantage of the recent design over traditional models is its performance in harsh environments. For instance, fiber brushes and reliable mechanical components in the new unit eliminate costly downtime.
The AC7008 slip ring operates maintenance free for over 100 million revolutions. What’s more, it does so without lubrication and over a wide range of temperatures, humidity, and rotational speeds. The slip ring is protected from the environment and sealed to an IP54 rating.
Key pluses for the design include:
- Maintenance free for over 100 million revolution
- Minimal generation of wear debris
- No lubrication required
- Wide operating temperature range
- Lower life cycle cost
- High reliability
Moog
moog.com/wind
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Slip ring can combine with signal, Ethernet, profibus and all kinds of fieldbus data transfer, and fiber optic contact can ensure the reliable.And the protect level can be IP 54, also it is a long life design to decrease the maintenance.
More about slip ring: http://www.arslipring.com
Insulation material of the slip ring generally has the following functions:
1 ) The insulation between the rings of the conductive slip ring.
2 ) The insulation between the rings and the shafts of the conductive slip ring.
3 ) The insulation between the brushes and between the brushes and slip ring housing
more information:http://www.moflon.com
How much do one of these slip rings cost in comparison to a ge standard replacement slip ring.