Constant-speed transmission apparatus used for driving alternating-current generator of airplane

Abstract

The invention discloses a constant speed driving device for driving an airplane AC generator. The constant speed driving device structurally comprises a planet differential action speed reducer, a constant speed driving regulator and an air turbine. The planet carrier of the planet differential action speed reducer is driven by an engine through a gear driving mechanism; a sun gear meshing with a planet gear arranged on the planet carrier is driven by the air turbine through a gear driving mechanism thereof; the planet gear arranged on the planet carrier meshes with an inner gear; and through a motion output gear which is designed to be integrated with the inner gear, one path of the inner gear drives a power input shaft of the AC generator and the other path of the inner gear drives the constant speed driving regulator through a gear driving mechanism. An air inlet throttle of the air turbine is connected with a regulating and control mechanism execution member of the constant speed driving regulator; and the execution member controls and regulates the opening degree of the air inlet throttle. If an airplane adopts the AC generator driven by the constant speed driving device, the engine of the airplane can output a constant rotating speed to the AC generator with different rotating speeds, thereby providing the airplane with an AC power supply with constant frequency, and meeting the requirements on the AC power supply proposed by airplane electrification and automation.

Description

technical field [0001] The invention relates to the technology of an aircraft AC power supply system, and more specifically relates to a power input transmission device of an aircraft AC generator. Background technique [0002] With the rapid development of aviation technology, performance parameters such as flight speed, altitude and flight range of aircraft have been greatly improved, so the requirements for electrification and automation of aircraft are also increasing. As a result, the original low-voltage DC power supply can no longer meet the demand. In order to meet the needs of the rapid development of aircraft flight speed, altitude and flight range, the use of AC power systems with more advantages on aircraft has been put in front of people. The power supply system installed in some types of aircraft is the AC power supply system, and the AC power is provided by the engine-driven alternator. However, the existing aircraft alternator, because the rotational speed ...

AI Technical Summary

Problems solved by technology

However, the existing aircraft alternator, because the rotational speed of the engine changes greatly during operation, causes the frequency of the alternating current to vary within a wide range, which does not meet the requirements of the aircraft for the frequency stability of the alternating current power supply system

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