Wind turbine generator with improved operating subassemblies

Patent · Mon Dec 31 23:00:00 EST 1984

OSTI ID:865622

A wind turbine includes a yaw spring return assembly to return the nacelle from a position to which it has been rotated by yawing forces, thus preventing excessive twisting of the power cables and control cables. It also includes negative coning restrainers to limit the bending of the flexible arms of the rotor towards the tower, and stop means on the rotor shaft to orient the blades in a vertical position during periods when the unit is upwind when the wind commences. A pendulum pitch control mechanism is improved by orienting the pivot axis for the pendulum arm at an angle to the longitudinal axis of its support arm, and excessive creep is of the synthetic resin flexible beam support for the blades is prevented by a restraining cable which limits the extent of pivoting of the pendulum during normal operation but which will permit further pivoting under abnormal conditions to cause the rotor to stall.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Assignee: Cheney, Jr., Marvin C. (24 Stonepost Rd., Glastonbury, CT 06033)
• Patent Number(s): US 4545728
• OSTI ID: 865622
• Country of Publication: United States
• Language: English

Related Subjects

/416/
abnormal
abnormal condition
angle
arm
arms
assembly
axis
beam
bending
blades
cable
cables
commences
conditions
coning
control
control mechanism
creep
excessive
extent
flexible
flexible beam
forces
generator
improved
improved operating
limit
limits
longitudinal
longitudinal axis
means
mechanism
nacelle
negative
normal
normal condition
normal conditions
normal operation
operating
operation
orient
orienting
pendulum
periods
permit
pitch
pivot
pivot axis
pivoting
position
power
power cable
power cables
prevented
preventing
preventing excessive
resin
restrainers
restraining
return
rotated
rotor
rotor shaft
shaft
spring
spring return
stall
stop
stop means
subassemblies
support
support arm
synthetic
towards
tower
turbine
turbine generator
twisting
unit
upwind
vertical
vertical position
wind
wind turbine
yaw
yawing