In 1975, Hamar Laser built the first steam turbine laser alignment system for Westinghouse. Laser alignment saved the company significant time over traditional methods like tight wire, feeler gages (leads) or optics. With today's advanced laser systems, the timesaving benefit, as well as accuracy, has increased dramatically. According to the Tennessee Valley Authority, their allocated time for alignment dropped by 50 percent when using our L-705 Turbine Alignment System.
The most common method of turbine alignment is the tight wire. Although tight wire has produced good results for many years, it is increasingly becoming outdated. It takes too long to set up, is subject to vibration, which limits other work during alignment and is subject to catenary sag and other environmental influences. With power company consolidation and competitive power markets, shorter outages and more efficient turbines are critical to industry profitability.
The combination of the L-705 Turbine Alignment System, the L-740 Split-Joint Measuring System and the S-680 Coupling Alignment Systems create a powerful tool kit to significantly reduce turbine outages and increase efficiency. To give an example of increased efficiency, an L-705 customer told us that a turbine took 10 minutes to stop rotating after shutdown prior to laser alignment and 30 minutes after laser alignment!
There are 2 basic types of lasers:
- Straight-Line Laser Systems - designed for steam turbine bore and shaft alignment applications.
- Continuously Rotating Laser Systems - designed for split or horizontal-joint flatness measuring applications.
Our continuously rotating laser systems come in 2 accuracy grades: the L-730 Precision Series and the L-740 Ultra-Precision Series. Each series offers 4 different laser systems with single, dual and triple plane versions. The L-730 Series is designed for those with accuracies needs of 0.00012"/ft (0.01 mm/M) or higher and the L-740 Series is for those with accuracy needs of 0.00002"/ft (0.0017 mm/M) or higher.