Engine feathering parking protection method and feathering parking protection device
An engine and feathering technology, which is applied to the power plant, motor vehicle, transportation and packaging of the aircraft, can solve the problems of reduced reliability of engine protection, achieve the effect of avoiding abnormal feathering parking and reducing the false alarm rate
Active Publication Date: 2016-01-06
CHINA HANGFA SOUTH IND CO LTD
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Problems solved by technology
[0006] The present invention aims to provide an engine feathering shutdown protection method and a feathering shutdown protection device to solve the problem that the handling of the feathering operation is subject to the experience and subjective experience of the crew when the engine has a torque transmission system failure or a surge failure in the prior art. Judgment has a large impact, resulting in a decrease in the reliability of engine protection
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[0021] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.
[0022] The embodiment of the present invention provides a feather parking protection device for an engine, figure 1 It is a schematic diagram of a feather parking protection device of an engine according to an embodiment of the present invention, such as figure 1 As shown, the feathering parking protection device of the engine includes: a torque automatic feathering sensor 11 for detecting the output torque pressure of the engine. The torque automatic feathering sensor 11 includes a first output end and a second output end, and the torque pressure When the torque is greater than the second limit value, the second output terminal of the torque automatic feathering sensor 11 sends a first tur...
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The invention provides a feathering parking protection method and a feathering parking protection device of an engine. The engine feathering parking protection method comprises the following steps of: acquiring an accelerator angle and output torque pressure of the engine in real time; detecting whether a feathering preparation circuit is connected; judging whether the accelerator angle is larger than a preset value and whether the output torque pressure is smaller than a first limit value when the feathering preparation circuit is connected; and controlling a feathering device to start when the accelerator angle is larger than the preset value and the output torque pressure is smaller than the first limit value. When automatic feathering parking protection is performed, whether a current engine operating environment meets the feathering operation requirement is determined, and the feathering device cannot start under the condition that the feathering device is not in a preparation state; and therefore, abnormal feathering parking caused by failure of a torque pressure sensor system is avoided, and a false alarm rate is reduced.
Description
Technical field [0001] The invention relates to the field of engines, in particular to a feathering parking protection method and a feathering parking protection device of an engine. Background technique [0002] At present, the protective measures adopted by aircraft engines mainly include limited methods such as over-rotation protection stop and over-temperature protection stop. When the engine speed exceeds a limit value or the load is overloaded, the engine is stopped. [0003] Feathering operation refers to the operation of turning the blades of the aircraft propeller to a state close to parallel to the flight direction after the engine fails in the air. At this time, the blades make the propeller rotate slowly in the direction of the airflow, reducing the resistance of flight. Most of the existing feathering operations are manual operations, and the flight crew conducts proper handling of feathering operations through comprehensive judgment of the flight situation. [0004] W...
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IPC IPC(8): B64C27/68B64D35/00
Inventor 李琼谢宾李建英徐意王炜
Owner CHINA HANGFA SOUTH IND CO LTD