BOLTED JOINT FOR A WIND TURBINE BLADE

摘要

According to some implementations a bolted joint for modular blades is provided that comprises a single bolt that joins the inserts incorporated on the flange of the beam, screwing the two modules facing each other. A spacer is added to each bolt, and the bolts is then pre-tensioned by pulling, either mechanically separating the modules with a mechanical separator or thermally by applying heaters to the bolt and coolers to the spacer, or by torqueing the bolts

主权项

1. A method of connecting first and second modules of a wind turbine blade, each of the first and second modules having a plurality of respective first and second threaded inserts that face one another, the method comprising:
joining the first and second modules by the use of a plurality of bolts, each bolt having a first threaded end and a second threaded end, the first threaded end being threaded into one of the first threaded inserts and the second threaded end being threaded into one of the second threaded inserts by rotating the bolt in a first direction, the bolt being rotated to produce a gap having a first length between the first and second threaded inserts; and tensioning the plurality of bolts by:
(a) applying a force to mechanically separate the first and second modules in a manner to elastically elongate the bolts and to produce a gap having a second length between the first and second threaded inserts, the second length being greater than the first length,(b) inserting a spacer having a third length in the gap between each of the first and second threaded inserts, the third length being greater than the first length,(c) terminating applying the force so that the bolts elastically shorten and a gap of the third length is established between the first and second threaded inserts.