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Variable pitch rotor with remote counterweight

A counterweight, pitch angle technology, applied in non-variable volume pumps, components of pumping devices for elastic fluids, pump components, etc., can solve problems such as limiting design flexibility

Active Publication Date: 2018-04-13
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these are typically mounted to individual blades and thus limit design flexibility

Method used

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  • Variable pitch rotor with remote counterweight
  • Variable pitch rotor with remote counterweight
  • Variable pitch rotor with remote counterweight

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Embodiment Construction

[0037] Referring to the drawings in which like reference numerals denote like elements in the various figures, figure 1 A gas turbine engine 10 is depicted. Engine 10 has a longitudinal axis 11 and includes a fan 12 and a low pressure turbine ("LPT") 16, collectively referred to as the "low pressure system". LPT 16 drives fan 12 via an internal shaft 18, also referred to as the "LP shaft". Engine 10 also includes a high pressure compressor ("HPC") 20, a combustor 22, and a high pressure turbine ("HPT") 24, collectively referred to as a "gas generator" or "core". HPT 24 drives HPC 20 via external shaft 26, also referred to as the "HP shaft". In summary, the high and low pressure systems can be operated in a known manner to produce primary or core flow, as well as fan or bypass flow. Although engine 10 is shown as a high-bypass turbofan engine, the principles described herein are equally applicable to any other type of engine requiring variable pitch blades, including turbopr...

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PUM

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Abstract

The present invention relates to variable pitch rotors with remote counterweights. The pitch control mechanism (100, 200, 300, 400, 500, 600) includes: a rotor structure configured to rotate about a longitudinal axis; a row of blades (28) carried by the rotor structure, each blade having an airfoil and trunnions (120), which are mounted for pivotal movement relative to the rotor structure about a trunnion axis perpendicular to the longitudinal axis; synchronizing rings (108, 208, 308, 408, 508, 608), which cause the blades (28) to interact with each other; an actuator connected to the unison ring and the rotor structure operable to move the unison ring relative to the rotor structure; at least one movable counterweight carried by the rotor structure away from the blades (28); and An interconnection between (28) and the counterweight such that movement of the counterweight changes the pitch angle of the blades (28).

Description

[0001] This non-provisional application claims priority under 35 U.S.C. 119(e) to U.S. Provisional Patent Application No. 62 / 005572, filed May 30, 2014, entitled "Variable Pitch Rotor With Remote Counterweight," which Incorporated herein in its entirety by reference. technical field [0002] The present invention relates generally to variable pitch rotors, and more particularly to control mechanisms for such rotors. Background technique [0003] Aircraft powerplants are typically used to drive thrust-generating airfoil elements, such as propellers or fan blades. It is known to vary the angle of incidence of the airfoil elements relative to the rotating hub on which they are carried (ie the "pitch angle") in order to provide the maximum feasible propulsion efficiency under various flight conditions. [0004] A common method of pitch control employs hydraulic actuators that vary the blade pitch angle in response to pressurized fluid flow. The actuator moves the blades throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/26F04D27/00F02C3/04
Inventor D.A.尼尔加思B.W.米勒D.A.布拉德利
Owner GENERAL ELECTRIC CO