초록 ▼

Effective damping of blade vibratory energy is sought by the apparatus described herein. The concepts relate specifically to what is known as blade to blade damping as is distinguished from blade to ground damping. The dampers employed have a “T”shaped cross section geometry and are designed to exte

Effective damping of blade vibratory energy is sought by the apparatus described herein. The concepts relate specifically to what is known as blade to blade damping as is distinguished from blade to ground damping. The dampers employed have a “T”shaped cross section geometry and are designed to extend circumferentially on an engine rotor between the platform sections of each pair of rotor blades. The dampers are of extreme light weight such that the slipload forces required to generate sliding contact between the damper and the blade platforms is low.

대표청구항 ▼

In a rotor assembly of the axial flow rotary machine type in which a plurality of individually mounted blades, each having a platform section, extend outwardly on the machine, the improvement comprising: a blade to blade damper adapted to seat against a pair of adjacent blade platform sections in

In a rotor assembly of the axial flow rotary machine type in which a plurality of individually mounted blades, each having a platform section, extend outwardly on the machine, the improvement comprising: a blade to blade damper adapted to seat against a pair of adjacent blade platform sections in response to centrifugally generated loads in an operating engine and of essentially “T”shaped cross section geometry including a top bar and a web extending circumferentially with respect to the machine between said pair of adjacent blade platform sections wherein the top bar provides longitudinal stiffness in the direction of expected slip load forces and the web provides transverse stiffness in the direction normal to the expected slip load forces. The invention according to claims 1 or 2 in which said blade to blade dampers are of sufficiently light weight to limit the magnitude of the slipload force required to cause relative movement between said damper and said platform sections in an operative environment to a value below that which is generated by blade vibration such that energy in the vibrating blade is capable of being dissipated in the form of heat energy at the points of contact between the damper and platform sections. The invention according to claim 3 wherein the weight of said dampers is approximately [four one hundredths of a pound (0.04 lb.).]four one thousandths of a pound (0.004 lb.).