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Signal generator and excess revolution test system for turboshaft engine of manual operation type twin-engine helicopter

A signal generator and engine technology, applied in engine testing, machine/structural component testing, instruments, etc., can solve the problem that technical details cannot be obtained from public channels, and achieve the effect of making up for technical gaps

Inactive Publication Date: 2011-08-10
HARBIN
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although foreign countries have adopted the above-mentioned technologies, due to the technical blockade of foreign countries, the specific technical details cannot be obtained from public channels.

Method used

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  • Signal generator and excess revolution test system for turboshaft engine of manual operation type twin-engine helicopter
  • Signal generator and excess revolution test system for turboshaft engine of manual operation type twin-engine helicopter
  • Signal generator and excess revolution test system for turboshaft engine of manual operation type twin-engine helicopter

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Embodiment Construction

[0015] as attached figure 1 As shown, the signal generator of the hand-operated twin-engine helicopter turboshaft engine overrotation test system contains two completely independent main function circuit modules, and the signals output by the main function circuit modules represent two different working states of the engine. One of the signal generators is adjusted to a 24KHz signal of the engine free turbine normal speed, and the other signal generator is adjusted to a 29.2+1.0KHz signal of the engine overspeed speed. The two signals are input to the engine overspeed control box by the engine free turbine sensor interface , the engine overrun control box judges that the engine is in an overrun state and shuts down the engine. The engine over-rotation control box and the engine over-rotation oil discharge valve are components in the engine's own control system. Together with the signal generator, they constitute the hand-operated twin-engine helicopter turboshaft engine over-...

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Abstract

The invention relates to the technical field of an engine experiment, in particular to the technical field of an excess revolution experiment of a helicopter engine. A signal generator comprises two independent main functional circuit modules; and the two main functional circuit modules are identical in the circuit structure but different in adjustable parameters so as to achieve the purpose of accurate matching of output signals. An experimental system comprises the signal generator, an excess revolution control box of the engine and an excess revolution oil drainage valve of the engine, wherein the signal generator is used for simulating and generating output signals of a free turbine speed sensor of the engine; and the excess revolution control box of the engine is used for controlling the excess revolution oil drainage valve of the engine to open and close according to input free turbine speed signals of the engine. The invention fills up the blank of domestic technology and can complete the excess revolution experiment of a turboshaft engine of a manual operation type twin-engine helicopter under the conditions that the engine is not damaged, and the normal use recording of the helicopter engine is not affected.

Description

technical field [0001] The invention relates to the technical field of engine experiments, in particular to the technical field of helicopter engine overrotation experiments. Background technique [0002] When testing the engine control system, it is necessary to conduct an over-rotation experiment on the engine, that is, to check whether the engine control system can shut down the engine immediately when the engine over-rotates. Since engine over-rotation has great damage to the engine, it will also affect the normal use record of the aircraft engine. In actual tests, in order to protect the engine and not affect the normal use record of the aircraft engine, the manual twin-engine helicopter turboshaft In the over-rotation test system, the engine over-rotation signal is simulated by the over-rotation signal generator, without the need for the engine to actually enter the over-rotation state. [0003] There is no such technology and equipment in China at present. Although ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/02G01M15/00
Inventor 韩永良朱跃法张东青
Owner HARBIN
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