초록 ▼

An aerofoil blade damper comprising an elongate member which is inserted within a core passage of the blade and extends within the blade with the damper retained therein at one end which is closest to the blade root with the remainder of the damper free to move relative to and within the passage; su

An aerofoil blade damper comprising an elongate member which is inserted within a core passage of the blade and extends within the blade with the damper retained therein at one end which is closest to the blade root with the remainder of the damper free to move relative to and within the passage; such movement generating friction which dissipates any vibration. The damper comprises a plate insert including at least two discrete substantially oppositely directed contact regions which are arranged, in use, to frictionally engage the passage. The discrete contact regions may be provided by protrusions in the form of contact pads or arms extending from the plate or be provided by the corrugations of the plate. A contact load on the contact regions is provided by the resilience of the damper, an interference fit of the damper and/or centrifugal loading of the damper and contact regions during operation.

대표청구항 ▼

[ What is claimed is:] [1.]1. An aerofoil blade damper for use with an aerofoil blade which has a blade root and a core passage defined in the blade root and blade which extends within the blade root and blade, the damper comprising an elongate member which in use is arranged to be retained in the b

[ What is claimed is:] [1.]1. An aerofoil blade damper for use with an aerofoil blade which has a blade root and a core passage defined in the blade root and blade which extends within the blade root and blade, the damper comprising an elongate member which in use is arranged to be retained in the blade at one end which is closest to the blade root with the remainder of the damper free to move relative to and within the passage; wherein the damper comprises a resilient plate insert upon which there are provided at least two discrete substantially oppositely directed contact regions which are arranged, in use, to frictionally engage the passage, the damper being curved along its length. [2.]2. An aerofoil blade damper for use with an aerofoil blade which has a blade root and a core passage defined in the blade root and blade which extends within the blade root and blade, the damper comprising an elongate member which in use is arranged to be retained in the blade at one end which is closest to the blade root with the remainder of the damper free to move relative to and within the passage; wherein the damper comprises a resilient plate insert upon which there are provided at least two discrete substantially oppositely directed contact regions which are arranged, in use, to frictionally engage the passage, said contact regions comprising protrusions from the plate insert.