Pitch changing mechanism for fan blades
A variable pitch control for a bypass fan in a turbine engine installation is described including: a row of fan blades, each having at its inner end a crank arm by which the pitch of the fan may be changed, a supporting ring for the fan blades, each blade being mounted at its base in the ring and in a position to rotate on a radial axis, a fixed support structure for the ring, a first bearing supporting the ring to rotate on the fixed structure, a translatable sleeve splined to the support ring to rotate therewith and to slide axially relative thereto, a row of links connecting the sleeve with the crank arms and the blades, and each link being pivotally attached to the sleeve at one end and to the crank arm at the other end, a non-rotating translatable actuating sleeve within the first sleeve, a second bearing between the sleeves to cause the sleeves to move axially in unison, splines between the fixed structure and the second sleeve to support the second sleeve against rotation and means for actuating the second sleeve axially to change the pitch of the blades in unison.
- Assignee:
- United Technologies Corp., Hartford, CT
- Patent Number(s):
- US 4718823
- OSTI ID:
- 5280391
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330103* -- Internal Combustion Engines-- Turbine
AERODYNAMICS
BEARINGS
BLOWERS
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLUID MECHANICS
GAS TURBINE ENGINES
HEAT ENGINES
INCLINATION
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
MECHANICS
ORIENTATION
SLEEVES
SUPPORTS
TURBINE BLADES