US 10,378,518 B2
MAIN SHAFT FIXTUREGeneral
US 10,378,518 B2
MAIN SHAFT FIXTURE
Tech Center:
3700 Mechanical Engineering, Manufacturing and Medical Devices/Processes
Examiner:
Eric A Gates
Art Unit:
3722 Manufacturing Devices and Processes, Machine Tools and Hand Tools
Inventors:
Per E. Fenger
Assignee:
LIFTRA IP APS
Priority:
10/06/15
Filed:
04/06/17
Granted:
08/13/19
Expiration:
10/29/35
Abstract
A main shaft fixture for fixing a main shaft on a wind turbine during installation and repair work on heavy parts of the wind turbine nacelle, in the case where the fixture is formed of several sections for mounting on stable structural parts in the nacelle, including the nacelle's bottom frame. The main shaft fixture has adjustable pressure mandrels with tap shoes, which cause the fixture to be usable regardless of the turbine main shaft geometry, such that it can be mounted without fixing the rotor. The main shaft fixture also has facilities for mounting of a lightweight crane and a self-hoisting crane with a ground-based winch, respectively, as well as a rotor lock which, in combination with actuators of the main shaft fixture, enables the main shaft and the main shaft bearing to be sufficiently displaced vertically from its bearing in the nacelle to service or replace the bearing.
Cooperative Patent Classification (CPC)
F03F03D13/139F03DY10T279/1291Y10TB23B31/101B23BF05B2230/61F05BF16C2360/31F16CY02P70/50Y02E10/72Y02P