CN218648580U

CN218648580U - Device for reversely supplying power to external power socket by APU (auxiliary Power Unit) power supply

Info

Publication number: CN218648580U
Application number: CN202222702360.9U
Authority: CN
Inventors: 姚欣; 巨亚鸽; 王延延; 王洁
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-03-17
Anticipated expiration: 2032-10-13

Abstract

The application belongs to the technical field of aviation power supply systems, and particularly relates to a device for reversely supplying power to an external power socket by an APU (auxiliary Power Unit) power supply. The utility model provides a device of APU power reverse power supply to outside supply socket under big aircraft outage state, reliably connects jumper cable both ends respectively at the LXC contactor output and the EPC contactor input of machine-carried auxiliary power control box. After the jumper cable is successfully connected, the ground power supply vehicle is forbidden to be used by a large plane, the APU power supply is switched on after the auxiliary power equipment is started by using the existing storage battery, and at the moment, three contactors of AGC, LXC and RXC are switched on and the EPC contactor is switched off. The APU power supply normally supplies power to a power grid of the large airplane through AGC, LXC and RXC contactors, and simultaneously transmits alternating current electric energy to an external power socket through AGC, LXC and a jumper cable for ground guarantee of other small airplanes, so that the outfield power supply self-guarantee capability of the large airplane platform is realized.

Description

Device for reversely supplying power to external power socket by APU (auxiliary Power Unit) power supply

Technical Field

The application belongs to the technical field of aviation power supply systems, and particularly relates to a device for reversely supplying power to an external power socket by an APU (auxiliary Power Unit) power supply.

Background

Along with the rapid development of aviation technology, the platform function of a large airplane is increasingly remarkable, the main outstanding characteristic is strong transportation capacity, and in consideration of the technical field of aviation power supply systems, the large airplane has self-guarantee capability, and can complete routine inspection, maintenance and engine starting without depending on a ground power supply.

According to the large airplane platform, a simple guarantee base is established in an expanded mode, a systematic autonomous guarantee capability is formed, and technical support can be provided by a combat application mode of distributed cooperation and rapid reconfiguration. Focusing a station guarantee that a large airplane can provide for a small airplane, wherein power supply guarantee is a basic requirement, so how to realize the external supply of electric energy by the large airplane becomes a design difficulty.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a device that APU power supply backward supplies power to outside supply socket to solve at least one problem that exists among the prior art.

The technical scheme of the application is as follows:

an apparatus for reverse powering an APU power supply to an external power outlet, comprising: APU power, a first contactor, a second contactor, a third contactor, a fourth contactor, and a jumper cable, wherein,

the APU power supply is arranged in the aircraft;

the input end of the first contactor is connected with the APU power supply;

the input end of the second contactor is connected with the output end of the first contactor, and the output end of the second contactor is connected with the left alternating current connection bus bar;

the input end of the third contactor is connected with the output end of the first contactor, and the output end of the third contactor is connected with the right alternating current connection bus bar;

the input end of the fourth contactor is connected with an external power socket, and the output end of the fourth contactor is connected with the output end of the third contactor;

one end of the jumper cable is connected with the output end of the second contactor, and the other end of the jumper cable is connected with the input end of the fourth contactor.

In at least one embodiment of the present application, the first contactor, the second contactor, the third contactor, and the fourth contactor are all disposed on an onboard auxiliary power supply control box.

In at least one embodiment of this application, the output of second contactor and the input of fourth contactor are all arranged in the upper portion of airborne auxiliary power source control box, and both are apart from 150mm.

In at least one embodiment of the present application, the output terminal of the third contactor is disposed at a lower portion of the onboard auxiliary power control box.

Utility model has the following beneficial technical effects:

the device for reversely supplying power to the external power socket by the APU ensures that the large airplane normally supplies power to the electric equipment of the large airplane, and also provides an external output power channel, so that the self-guarantee capability of external field power supply of the large airplane platform is realized.

Drawings

FIG. 1 is a schematic block diagram of a self-barrier AC power supply of a large aircraft according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an apparatus for reverse powering an APU power supply to an external power outlet in accordance with one embodiment of the present application.

Wherein:

1-APU power left output end; 2-external power socket input side.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some, but not all embodiments of the disclosure. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing the present application and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1-2.

The application provides an APU power reverse power supply device to outside supply socket, include: APU power supply, first contactor AGC, second contactor LXC, third contactor RXC, fourth contactor EPC, and jumper cable.

Specifically, referring to FIG. 2, the APU power supply is located inside the aircraft; the input end of the first contactor AGC is connected with an APU power supply; the input end of the second contactor LXC is connected with the output end of the first contactor AGC, and the output end of the second contactor LXC is connected with the left alternating current connection bus bar; the input end of a third contactor RXC is connected with the output end of the first contactor AGC, and the output end of the third contactor RXC is connected with a right alternating current connecting bus bar; the input end of the fourth contactor EPC is connected with an external power socket, and the output end of the fourth contactor EPC is connected with the output end of the third contactor RXC; one end of a jumper cable is connected with the output end of the second contactor LXC, and the other end of the jumper cable is connected with the input end of the fourth contactor EPC, so that the connection between the output end 1 on the left side of the APU power supply and the input side 2 of the external power socket is realized through the jumper cable.

As shown in fig. 1, the self-protection ac power supply of the large aircraft is provided with two channels, namely an external power supply and an APU power supply, wherein the two channels can independently supply power to the aircraft and can also simultaneously supply power to the aircraft, meanwhile, the power supply logic supplies power to a left side power grid for the APU power supply, and the external power supply supplies power to a right side power grid. The APU power supply supplies power to the on-board power grid through contactors such as AGC, LXC and RXC. In order to supply electric energy to the outside of a large airplane, as can be seen from the power supply state of fig. 1, if the EPC contactor is turned on, the ac power of the APU power source can be transmitted to the external power outlet. In the beginning of the design of an APU power supply and an external power supply, in order to prevent the parallel connection between the two power supplies, the large airplane is specially designed with an electromechanical interlocking circuit for preventing the parallel connection, and reliably ensures that three contactors of AGC, EPC and RXC can only be switched on by any two contactors at the same time. When the APU power supplies power to the whole machine (AGC and RXC contactors are both switched on), a control signal is required to be applied from the outside to control the switching-on function of the EPC contactor, and meanwhile, the existing onboard equipment on the machine is required to be improved, so that the original purpose of quick modification is violated, and therefore, the scheme of directly controlling and switching on the EPC contactor is not feasible. The power supply of the large airplane is self-guaranteed from the APU power, and a scheme for safely conveying the electric energy of the APU power to the outside of the airplane needs to be designed to realize the output capacity of the mobile electric energy guarantee platform of the large airplane.

The utility model provides a device of APU power reverse power supply to external power socket, proposes when APU power supply, and LXC and RXC contactor's output all has the electricity, from LXC or RXC contactor's output, transfers the alternating current to the input of EPC contactor, can realize carrying the function of the alternating current that APU power sent to external power socket. AGC, EPC, LXC and RXC contactors on a large airplane are all installed in the same airborne equipment, namely an airborne auxiliary power supply control box, wherein the output end of the LXC contactor and the input end of the EPC are both arranged at the upper part of the airborne equipment, and the distance between the output end of the LXC contactor and the input end of the EPC is about 150mm; the output terminals of the RXC contactors are disposed at the lower portion of the onboard equipment and the external cable connections are less accessible than the LXC contactor terminals. Therefore, in the application, the alternating current of the APU power supply is transferred from the output end of the LXC contactor to the input end of the EPC contactor, and the reverse power supply function of the APU power supply to an external power socket is realized through three jumper cables.

The utility model provides a device of APU power reverse power supply to outside supply socket under big aircraft outage state, reliably connects jumper cable both ends respectively at the LXC contactor output and the EPC contactor input of machine-carried auxiliary power control box. After the jumper cable is successfully connected, the auxiliary power equipment is started by using the storage battery, the power supply of the APU is switched on, three contactors of AGC, LXC and RXC are switched on at the moment, and the EPC contactor is switched off. The APU power supply normally supplies power to a power grid of the large airplane through the AGC, LXC and RXC contactors, and simultaneously transmits alternating current electric energy to an external power socket through the AGC, the LXC and a jumper cable for ground guarantee of other small airplanes, so that the power supply and the outward output guarantee capability of the large airplane platform under the outfield condition are realized.

The utility model provides a device of APU power to outside supply socket reverse power supply designs a cross-over connection passageway on big aircraft power supply frame, from the output of the LXC contactor of left side AC connection busbar front end on the machine with the alternating current switching of APU power to the external power input, can realize that the APU power supplies power to big aircraft full machine in, can also provide the reverse power supply passageway of the same way outside to the machine through the external supply socket, realize the reverse power supply function to outside supply socket.

The utility model provides a device of APU power to reverse power supply of outside supply socket has realized providing transmission of electricity ability to the machine outside as portable electric energy guarantee platform with big aircraft through three-phase cross-over connection electric wire at any time, has solved the ground guarantee ability in no simple and crude airport of ground supply vehicle, has great practical application and worth, and power supply mode is safe, reliable. The novel working mode changes the traditional power supply mode of an external power supply interface of an airplane, realizes that electric energy can flow from an external power supply to the airplane and can be transmitted from the airplane to the outside, and finishes the conversion from a simplex mode to a half-duplex mode.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An apparatus for powering back an APU power supply to an external power outlet, comprising: an APU power supply, a first contactor, a second contactor, a third contactor, a fourth contactor, and a jumper cable, wherein,

the APU power supply is arranged in the aircraft;

the input end of the first contactor is connected with the APU power supply;

the input end of the third contactor is connected with the output end of the first contactor, and the output end of the third contactor is connected with the right-side alternating current connection bus bar;

2. The apparatus of claim 1 wherein the first contactor, the second contactor, the third contactor, and the fourth contactor are all disposed on an onboard auxiliary power control box.

3. The APU power supply of claim 2, wherein both the output of said second contactor and the input of said fourth contactor are disposed at the upper portion of said onboard auxiliary power control box, at a distance of 150mm.

4. The apparatus in accordance with claim 3 wherein the output of said third contactor is disposed at a lower portion of said on-board auxiliary power control box.