Residual-oil discharging method for ventilation cabinet of fuel system of negative dihedral wing of large aircraft
A technology of fuel system and breather box, which is applied to the fuel tank of the power plant and other directions, can solve the problems of low oil discharge efficiency and inconvenient operation, and achieve the effect of reducing the workload.
Active Publication Date: 2015-10-07
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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[0003] The purpose of the present invention is to provide a method for discharging residual oil in the ventilation tank of the lower anti-wing fuel system of a large aircraft, so as to solve the problems of low oil discharge efficiency and inconvenient operation of the residual oil discharge method
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[0019] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.
[0020] Such as Figure 1 to Figure 2 As shown, the method for discharging residual oil in the ventilation tank of the anti-wing fuel system under the large aircraft provided by the present invention comprises the following steps:
[0021] Step 1. Judging whether the remaining oil in the vent box 1 is less than a predetermined value of remaining oil, if not, go to step 2; otherwise, go to step 3.
[0022] In step two, the fuel in the breather tank 1 is delivered to the main fuel tank 8 through the oil discharge system, until the amount of fuel oil in the breather tank 1 is less than the predetermined value of remaining oil, the oil discharge system is controlled to sto...
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The invention relates to a residual-oil discharging technology for ventilation cabinets of fuel systems of aircrafts, particularly to a residual-oil discharging method for a ventilation cabinet of a fuel system of a negative dihedral wing of a large aircraft, and solves the problems that a conventional residual-oil discharging method is low in residual oil discharging efficiency and inconvenient to operate. According to the residual-oil discharging method for the ventilation cabinet, which is disclosed by the invention, when the amount of residual oil in the ventilation cabinet is larger than a preset value, most of fuel is discharged to a main oil tank through an oil discharging system, so that the waste of the fuel is avoided; when the amount of the residual oil in the ventilation cabinet is smaller than the preset value, the residual oil is discharged through a sediment discharging valve; in addition, if the initial amount of the residual oil in the ventilation cabinet is smaller than the preset value, the residual oil is directly discharged through the sediment discharging valve. The residual-oil discharging method combines two oil discharging manners, so that the oil discharging efficiency is improved, and the oil can be thoroughly discharged; the fuel can be prevented from being splashed on the bodies of maintenance personnel on the ground or polluting the surrounding environment; besides, the workload for opening a maintenance mouth cover is omitted.
Description
technical field [0001] The invention relates to a technology for discharging residual oil in a breather tank of an aircraft fuel system, in particular to a method for discharging residual oil in a vent tank of a lower anti-wing fuel system of a large aircraft. Background technique [0002] Traditional aircraft fuel system vent box residual oil discharge is: by opening the vent box maintenance cover, the residual oil in the vent box will be discharged. The disadvantage is that the oil discharge efficiency is low, and since the remaining oil in the breather box cannot be judged without opening the maintenance cover of the breather box, the fuel is easily sprayed on the ground maintenance personnel during the oil discharge process, and the fuel will pollute the surrounding environment . Contents of the invention [0003] The purpose of the present invention is to provide a method for discharging residual oil from the breather tank of the lower anti-wing fuel system of a larg...
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Inventor 林厚焰任恒英刘斌戴晨峰
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA