6.0Tower and Wind Turbine Generator Installation

Blade #1

44

Turbine on pallet

Ground level

Figure 6-7 Positioning the blade for attachment

4 Corner Bolts

Figure 6-8 Bolting blade to a hub

The blade pitch can be adjusted to set the peak power production and to accommodate various wind resources. For pitch setting, consistency between blades and optimum power capture, AOC recommends that a pitch tool be used which may be purchased from AOC. Currently a standard, an aggressive and a conservative pitch setting tool are available. (See figure 6-9 for pitch variance.) Custom pitch tools may also be designed for specific sites.

At this point the remaining six bolts and ten washers should be installed and the pitch tool removed. Loctite 271 should be applied to each of the bolts strictly following the procedure outlined in Appendix J-3. All the blade bolts should be torqued in two stages using a 15/16" socket: first to 180 Nm (130 ft-lbs) and then to 243 Nm (180 ft-lbs). The blade bolts should be torqued in a star pattern starting with #1 as shown in Figure 6-10. The blade washers MUST be

NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer on page v of this document.

DOC012R02

AOC 15/50 User Manual

Nov 2001

Page 52
Image 52
AOC 15 user manual Corner Bolts