Operation & Maintenance of Power Plants
problems when they had occurred or were about to occur,” says Clive Davies.
Component repair To improve the operational efficiency of the power station, SSE embarked on a programme to install a dedicated condition monitoring system for the cooling tower, as part of a longer term predictive maintenance strategy.
Te new system is based around the SKF IMx-S online condition monitoring system, connected to a network of 60 accelerometers; there are five of these on each fan, motor and gearbox, plus an SKF Machine Condition Transmitter (MCT) fitted to each gearbox input shaft bearing to provide an alarm trip function. SKF’s on-line monitoring systems provide automated machinery monitoring for up-to-the- minute information to help you optimise the operation of key production assets. On-line systems complement the use of periodic data collection instruments, facilitating a proactive approach to reliability with round-the-clock monitoring of machinery in harsh, remote, unsafe or difficult to reach locations. Te SKF Multilog On-line System IMx-S is a key component in an advanced condition monitoring system. It is a robust measurement unit designed for tough industrial environments. Each SKF Multilog IMx-S 16 is equipped with 16 analogue signal inputs, and the SKF Multilog IMx-S
For more information, visit
www.skf.com Actuators offer significant torque advancement A
UMA is extending its portfolio of modular electric actuators to include an SQ .2 part-turn range
for butterfly and ball valve automation. Scheduled for launch in 2013, the actuators will replace the company’s established SG.1 range manufactured since 1998.
A new actuator size included in the
SQ.2 series more than doubles the torque range previously offered by the SG.1: this represents a significant expansion now covering 50Nm to 2,400Nm. Other developments include the
introduction of an SQR version for modulating duty which replaces the SGR. The SQR provides improved control characteristics with enhanced positioning accuracy and an increased number of
Fig. 1. AUMA’s new SQ.2 part-turn electric actuator series with torque range from 50Nm to 2,400Nm.
20
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permissible starts per hour. Commissioning and operation of SQ
actuators are identical to the SA .2 multi-turn type range, introduced by AUMA in 2010. This includes the same control concept: both ranges are without integral controls and are available with simple AM or micro- controller controlled AC. As a result, controls are interchangeable and, at plants where both product series are installed, on-site device management is simplified. AUMA’s newly introduced two-
component powder coating has been incorporated into the SQ.2 design ensuring improved corrosion protection. The enclosure protection of the devices meets IP 68 - basic standard. ●
Enter 20 or ✔ at
www.engineerlive.com/ipe AUMA Riester GmbH & Co. KG
is based in Muellheim, Germany.
www.auma.com
32 with 32 analogue signal inputs. Outputs are relayed to a control room terminal
running the SKF @ptitude monitoring analysis and reporting software, providing a real-time display of all key operating parameters. Clive Davies praises the support that SSE received
from SKF: “Tey helped us throughout the planning and implementation phase, providing valuable information and practical advice. Tey also gave us comprehensive training and undertook the installation in a professional and efficient manner; indeed, they have been one of the few outside contractors with an almost perfect on-site safety record - this is an important factor for us as we have a strong health and safety policy that everybody entering the site has to follow.” He concludes: “Te new SKF conditioning monitoring system enables us to identify wear in key components long before it becomes a potential problem.
Planned maintennce As a result, we can plan essential maintenance in advance and for a time when we know that demand for generating capacity will be low. Just as importantly, we are now seeing significant
improvements in availability, typically in the order of 30 per cent, which contribute directly to our ability to maximise the revenue from our power generating plant.” ●
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