Pitch changing mechanism for fan blades

Patent · Tue Jan 12 00:00:00 EST 1988

OSTI ID:5280391

Dennison, W T

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
• Resource Relation: Patent File Date: Filed date 24 Feb 1987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
TURBINE BLADES
CONTROL EQUIPMENT
INCLINATION
AERODYNAMICS
BEARINGS
BLOWERS
GAS TURBINE ENGINES
ORIENTATION
SLEEVES
SUPPORTS
ENGINES
EQUIPMENT
FLUID MECHANICS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
MECHANICS
330103* - Internal Combustion Engines- Turbine