FAN BLADES WITH VARIABLE PITCH ANGLE Russian patent published in 2014 - IPC F04D29/36 F04D27/02 

Abstract RU 2523928 C2

FIELD: engines and pumps.

SUBSTANCE: this invention relates to bypass turbojet delivery part (1a) including multiple blower blades (20) and support disc (22) for said blades. Said disc can spin relative to blower stator part (4) relative to blower lengthwise axis (2). Blade pitch angle variation system is connected with every blower blade. These systems are developed so that every pitch angle varies in compliance with single law. This law represents a function of the blade (20) angular position relative to blower stator part with respect to said lengthwise axis (2). Said single law is a periodic law and features period P=360°n, where n is an integer larger than or equal to 1.

EFFECT: comprehensive response to irregular air feed, preventing engine surging and decrease in efficiency.

13 cl, 7 dwg

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RU 2 523 928 C2

Authors

Bujer Filipp P'Er Vensan

Russelehn Stefan

Dates

2014-07-27Published

2010-02-25Filed