Local hydraulic source braking system of airplane

文档序号：1728432 发布日期：2019-12-20 浏览：17次中文

阅读说明：本技术 飞机局部液压源刹车系统 (Local hydraulic source braking system of airplane ) 是由杨弘肖扬李冰杨晓于 2019-10-16 设计创作，主要内容包括：本发明涉及飞机局部液压源刹车系统。飞机局部液压源刹车系统包括泵、液压油箱、刹车作动器、供油管路、回油管路和刹车控制单元,其中,供油管路设置在液压油箱和刹车作动器之间,且泵设置在供油管路中,回油管路设置在刹车作动器和液压油箱之间且是与供油管路分开的管路,刹车控制单元连接至泵；当提供刹车指令至刹车控制单元时,刹车控制单元控制泵工作,将液压油箱中的液压油通过供油管路供给到刹车作动器中；当解除刹车指令时,泵不工作,刹车作动器中的液压油通过回油管路回到液压油箱中。本发明能起到以下有益技术效果：缩减液压附件的数量,减轻刹车系统的重量,确保刹车系统的快速响应。(The invention relates to a local hydraulic source braking system of an airplane. The local hydraulic source brake system of the airplane comprises a pump, a hydraulic oil tank, a brake actuator, an oil supply pipeline, an oil return pipeline and a brake control unit, wherein the oil supply pipeline is arranged between the hydraulic oil tank and the brake actuator, the pump is arranged in the oil supply pipeline, the oil return pipeline is arranged between the brake actuator and the hydraulic oil tank and is a pipeline separated from the oil supply pipeline, and the brake control unit is connected to the pump; when a braking instruction is provided to the braking control unit, the braking control unit controls the pump to work, and hydraulic oil in the hydraulic oil tank is supplied to the braking actuator through the oil supply pipeline; when the braking instruction is released, the pump does not work, and hydraulic oil in the brake actuator returns to the hydraulic oil tank through the oil return pipeline. The invention can achieve the following beneficial technical effects: the number of hydraulic accessories is reduced, the weight of the brake system is reduced, and the quick response of the brake system is ensured.)

1. The local hydraulic source brake system of the airplane is characterized by comprising a pump, a hydraulic oil tank, a brake actuator, an oil supply pipeline, an oil return pipeline and a brake control unit, wherein the oil supply pipeline is arranged between the hydraulic oil tank and the brake actuator, the pump is arranged in the oil supply pipeline, the oil return pipeline is arranged between the brake actuator and the hydraulic oil tank and is a pipeline separated from the oil supply pipeline, and the brake control unit is connected to the pump;

when a braking instruction is provided to the braking control unit, the braking control unit controls the pump to work, and hydraulic oil in the hydraulic oil tank is supplied to the braking actuator through the oil supply pipeline;

when a braking instruction is released, the pump does not work, and hydraulic oil in the brake actuator returns to the hydraulic oil tank through the oil return pipeline.

2. An aircraft local hydraulic source braking system according to claim 1, further comprising a shutdown brake valve disposed in the return line and connected to a shutdown brake switch, wherein when the shutdown brake switch is turned on, the shutdown brake valve shuts off the return line and prevents hydraulic oil in the brake actuator from returning to the hydraulic oil tank through the return line.

3. The aircraft local hydraulic source braking system of claim 1, further comprising a first check valve disposed in the oil supply line to ensure that hydraulic oil does not flow backwards in the oil supply line.

4. An aircraft local hydraulic source braking system according to claim 1 further comprising a second check valve disposed in the return line to ensure that hydraulic oil does not flow back in the return line.

5. An aircraft partial hydraulic source braking system according to claim 1 wherein the pump and the hydraulic reservoir are both mounted within the landing gear axle.

6. An aircraft partial hydraulic source braking system according to claim 1 wherein the pump is mounted within the landing gear axle and the hydraulic reservoir is mounted within the landing gear frame body.

7. An aircraft local hydraulic source braking system according to claim 5 wherein the aircraft landing gear includes a plurality of landing gear wheels, each pump corresponding to a respective one of the landing gear wheels and each pump corresponding to a respective one of the hydraulic tanks.

8. An aircraft local hydraulic source braking system according to claim 6 wherein the aircraft landing gear includes a plurality of landing gear wheels, each pump corresponding to a respective one of the landing gear wheels, and two pumps located within the same axle share a hydraulic reservoir.

9. An aircraft local hydraulic source braking system according to claim 1, wherein a fuel level sensor is provided in the hydraulic fuel tank.

10. An aircraft local hydraulic source braking system according to claim 5 wherein a maintenance flap is provided on the landing gear axle to facilitate the addition of hydraulic oil to the hydraulic oil tank.

11. An aircraft local hydraulic source braking system according to claim 6, wherein the landing gear frame body is provided with a maintenance port cover to facilitate the addition of hydraulic oil to the hydraulic oil tank.

Technical Field

The invention relates to the technical field of aviation, in particular to a local hydraulic source brake system of an airplane.

Background

At present, the brake system of most airplanes adopts a hydraulic energy system of the airplane as energy input, and the brake system architecture adopts hydraulic accessories such as a Brake Control Valve (BCV), a stop valve (SOV), a one-way valve (CV), a shuttle valve (SV, as required), a Hydraulic Fuse (HF), an accumulator (ACC, as required) and the like; a large number of hydraulic pipelines are adopted for connection between the hydraulic energy system and the brake system, so that the weight of the airplane is greatly increased; meanwhile, limited by the length of the hydraulic pipeline, if the hydraulic pipeline between the brake control valve and the brake actuator is too long, the response time of the brake system is affected; furthermore, failure of hydraulic accessories in the brake system can affect the safety of the brake system and the dispatch of the aircraft.

Disclosure of Invention

An object of the present invention is to provide a local hydraulic source braking system for an aircraft, which can solve the problems of the prior art, reduce the number of hydraulic accessories, reduce the weight of the braking system, and ensure the quick response of the braking system.

The above object of the present invention is achieved by an aircraft local hydraulic source brake system, which includes a pump, a hydraulic oil tank, a brake actuator, an oil supply pipeline, an oil return pipeline, and a brake control unit, wherein the oil supply pipeline is disposed between the hydraulic oil tank and the brake actuator, the pump is disposed in the oil supply pipeline, the oil return pipeline is disposed between the brake actuator and the hydraulic oil tank and is a pipeline separated from the oil supply pipeline, and the brake control unit is connected to the pump;

when a braking instruction is released, the pump does not work, and hydraulic oil in the brake actuator returns to the hydraulic oil tank through the oil return pipeline.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the number of hydraulic accessories is reduced, the weight of the brake system is reduced, and the quick response of the brake system is ensured.

Specifically, the invention adopts the local hydraulic source brake system of the airplane, thereby greatly reducing the number of hydraulic accessories, greatly reducing the number of hydraulic pipelines, being capable of supplying pressure autonomously, needing no access of the hydraulic energy system of the airplane, greatly reducing the weight of the brake system, avoiding the influence of the hydraulic energy system on the brake system, and ensuring the quick response of the brake system when a pilot gives a brake instruction.

Preferably, the aircraft local hydraulic source braking system further comprises a shutdown brake valve, the shutdown brake valve is arranged in the oil return pipeline and connected to a shutdown brake switch, and when the shutdown brake switch is turned on, the shutdown brake valve cuts off the oil return pipeline to prevent hydraulic oil in the brake actuator from returning to the hydraulic oil tank through the oil return pipeline.

Preferably, the aircraft local hydraulic source braking system further comprises a first check valve, and the first check valve is arranged in the oil supply pipeline so as to ensure that hydraulic oil does not flow backwards in the oil supply pipeline.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the backflow prevention of the hydraulic oil in the oil supply pipeline can be ensured.

Preferably, the local hydraulic source braking system of the aircraft further comprises a second one-way valve, and the second one-way valve is arranged in the oil return pipeline, so that the hydraulic oil is prevented from flowing backwards in the oil return pipeline.

Preferably, the pump and the hydraulic reservoir are both mounted within the landing gear axle.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the space of installing the hydraulic accessories of the braking system in the landing gear cabin is saved, the position is close to the position of the brake actuator, and the quick response of the braking system when a pilot gives a braking instruction can be guaranteed.

Preferably the pump is mounted within the landing gear axle and the hydraulic reservoir is mounted within the landing gear frame body.

Preferably, the aircraft landing gear comprises a plurality of landing gear wheels, each pump corresponding to a respective one of the landing gear wheels and each pump corresponding to a respective one of the hydraulic tanks.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: each pump corresponds to a corresponding one of the hydraulic tanks, and the control of the supply of oil to each of the hydraulic tanks is facilitated.

Preferably, the aircraft landing gear comprises a plurality of landing gear wheels, each pump corresponding to a respective one of the landing gear wheels, and two pumps located within the same axle share a hydraulic reservoir.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: two pumps positioned in the same axle share one hydraulic oil tank, so that the space for installing hydraulic accessories of a braking system in the landing gear cabin is further saved.

Preferably, an oil quantity sensor is arranged in the hydraulic oil tank.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the hydraulic oil leakage indicator is used for indicating the volume of the hydraulic oil in the hydraulic oil tank, and is convenient for maintenance personnel to monitor leakage of hydraulic oil.

Preferably, a maintenance cover is arranged on the undercarriage axle so as to add hydraulic oil into the hydraulic oil tank.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: and the maintenance personnel can add hydraulic oil into the hydraulic oil tank conveniently.

Preferably, the undercarriage frame main body is provided with a maintenance opening cover so as to add hydraulic oil into the hydraulic oil tank.

Drawings

Fig. 1 is a schematic structural diagram of a local hydraulic source braking system of an aircraft according to an embodiment of the present invention.

FIG. 2 is a schematic installation view of a local hydraulic source braking system for an aircraft in accordance with an embodiment of the present invention.

FIG. 3 is another schematic installation view of a local hydraulic source braking system for an aircraft in accordance with an embodiment of the present invention.

FIG. 4 is another schematic illustration of an exemplary embodiment of an aircraft local hydraulic source braking system according to the present invention.

List of reference numerals

1. Pump and method of operating the same

2. Hydraulic oil tank

3. Brake actuator

4. Oil supply pipeline

5. Oil return pipeline

6. Brake control unit

7. Stop brake valve

8. First check valve

9. Second check valve

11. Wheel axle

12. Vehicle frame main body

Detailed Description

While specific embodiments of the invention will be described below, it should be noted that in the course of the detailed description of these embodiments, in order to provide a concise and concise description, all features of an actual implementation may not be described in detail. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions are made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be further appreciated that such a development effort might be complex and tedious, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as a complete understanding of this disclosure.

Unless otherwise defined, technical or scientific terms used in the claims and the specification should have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "a" or "an," and the like, do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalent, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, nor are they restricted to direct or indirect connections.

Fig. 1 is a schematic structural diagram of a local hydraulic source braking system of an aircraft according to an embodiment of the present invention. FIG. 2 is a schematic installation view of a local hydraulic source braking system for an aircraft in accordance with an embodiment of the present invention. FIG. 3 is another schematic installation view of a local hydraulic source braking system for an aircraft in accordance with an embodiment of the present invention. FIG. 4 is another schematic illustration of an exemplary embodiment of an aircraft local hydraulic source braking system according to the present invention.

As shown in fig. 1, according to an embodiment of the present invention, an aircraft local hydraulic source brake system includes a pump 1, a hydraulic oil tank 2 (for providing hydraulic energy to a brake actuator 3), a brake actuator 3 (for providing brake actuation to an aircraft), an oil supply pipeline 4, an oil return pipeline 5 and a brake control unit 6, wherein the oil supply pipeline 4 is disposed between the hydraulic oil tank 2 and the brake actuator 3, the pump 1 is disposed in the oil supply pipeline 4, the oil return pipeline 5 is disposed between the brake actuator 3 and the hydraulic oil tank 2 and is a pipeline separated from the oil supply pipeline 4, and the brake control unit 6 is connected to the pump 1;

when a braking instruction is provided to the braking control unit 6, the braking control unit 6 controls the pump 1 to work, and the hydraulic oil in the hydraulic oil tank 2 is supplied to the braking actuator 3 through the oil supply pipeline 4;

when the braking instruction is released, the pump 1 does not work, and the hydraulic oil in the brake actuator 3 returns to the hydraulic oil tank 2 through the oil return pipeline 5.

That is, the present invention applies a local Hydraulic pressure source (HPP) (primarily including a pump and a Hydraulic tank) to an aircraft brake system, which is directly connected to a brake actuator that is pumped into operation when a pilot provides a brake command. Meanwhile, an oil return pipeline of the brake actuator is directly connected to the local hydraulic source to form a closed loop between the local hydraulic source and the brake actuator.

Preferably, the pump 1 is a motor driven pump.

Of course, the motor-driven pump described above is only one preferred form of pump for use in the aircraft local hydraulic braking system of the present application, and those skilled in the art will appreciate based on the present disclosure that other suitable pumps (e.g., hydraulically driven pumps, etc.) may be used without departing from the scope of the claims of the present application.

Preferably, the aircraft local hydraulic source braking system further comprises a shutdown brake valve 7, the shutdown brake valve 7 is disposed in the oil return line 5 and connected to the shutdown brake switch, and when the shutdown brake switch is turned on, the shutdown brake valve 7 cuts off the oil return line 5 to prevent hydraulic oil in the brake actuator 3 from returning to the hydraulic oil tank 2 through the oil return line 5.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the hydraulic oil return device can provide a shutdown brake function, and prevents hydraulic oil in a brake actuator from returning to a hydraulic oil tank through an oil return pipeline, so that hydraulic oil is always available in the brake actuator, and the shutdown brake function is completed. In addition, after the power of the airplane is cut off, the hydraulic oil in the hydraulic oil tank can still ensure that the shutdown brake function meets the requirements of airworthiness provisions.

Preferably, the aircraft local hydraulic source braking system further comprises a first check valve 8, the first check valve 8 being arranged in the oil supply line 4 so as to ensure that hydraulic oil does not flow backwards in the oil supply line 4.

Preferably, the aircraft local hydraulic source braking system further comprises a second check valve 9, and the second check valve 9 is arranged in the return line 5, so as to ensure that the hydraulic oil does not flow backwards in the return line 5.

Compared with the prior art, the technical scheme provided by the invention has one or more of the following advantages:

(1) the hydraulic pipeline connection between the hydraulic energy system of the airplane and the brake system is not needed, so that the weight of the airplane is greatly reduced;

(2) after being used, the hydraulic oil returns to the hydraulic oil tank again through the oil return pipeline, so that the hydraulic oil in the brake system can be ensured to be circularly used in a closed manner except for the leakage of the hydraulic oil of the pump, the valve and the actuator;

(3) the brake system is simple in structure, so that the brake system is simple to install and can be arranged in a place which is very close to the brake actuator, and the quick and timely response of the brake system can be ensured;

(4) the invention is convenient to maintain because the system architecture is simple.

Preferably, as shown in figures 2 to 4, according to an embodiment of the invention, the local hydraulic pressure source (comprising the pump 1 and the hydraulic oil tank 2) is mounted within the axle 11 of the landing gear or within the frame body 12.

According to the technical scheme, the local hydraulic source braking system of the airplane can achieve the following beneficial technical effects: the space for installing the hydraulic accessories of the braking system in the landing gear cabin is saved, the position is closer to the position of the brake actuator, and the quick response of the braking system when a pilot gives a braking instruction can be guaranteed.

It should be noted that aircraft landing gear generally includes two forms: one is of the double-axle type (also referred to as wheel axle type), i.e. comprising only two axles 11 (one pair of axles), as shown in fig. 4; another is in the form of a multi-axle (also called trolley frame) comprising four or six axles (two or three pairs of axles), four axles 11 being shown in fig. 2 and 3. In an aircraft landing gear in the form of a multi-axle, the frame body 12 connects a plurality of pairs of axles. For example, as shown in fig. 2 and 3, the frame body 12 connects the two pairs of wheel shafts 11.

Preferably, the volume of the hydraulic oil tank 2 and the size of the pump 1 are calculated according to the amount of hydraulic oil required to drive the brake actuator and the speed of oil supply. If the volume of the space inside the axle 11 is sufficient to install the local hydraulic source, the local hydraulic source as a whole (the pump 1 and the hydraulic oil tank 2) is installed inside the axle 11, as shown in fig. 2 and 4; if the volume of the space inside the wheel axle 11 is not enough to install the local hydraulic pressure source, the hydraulic oil tank 2 is installed in the frame body 12, and the pump 1 is installed in the wheel axle 11. In the case where the hydraulic tank 2 is mounted in the frame body 12, it is preferable that the two right and left pumps 1 share one hydraulic tank 2, as shown in fig. 3.

Preferably, the axle 11 is designed to be a two-section structure with a fastened thread, so that the trolley frame can be conveniently disassembled and assembled when the hydraulic oil tank 2 needs to be replenished with oil or the pump 1 needs to be replaced, and the maintenance of a local hydraulic source by ground staff is facilitated.

Preferably, an oil quantity sensor is installed in the hydraulic oil tank 2 for indicating the volume of the hydraulic oil quantity in the hydraulic oil tank, so that maintenance personnel can monitor the leakage of the hydraulic oil conveniently.

Preferably, a maintenance opening cover is arranged on the wheel shaft 11 or the frame body 12, so that maintenance personnel can add hydraulic oil into the hydraulic oil tank conveniently.

Compared with the prior art, the technical scheme provided by the invention also has one or more of the following advantages:

(1) according to the invention, the local hydraulic source suitable for the brake system is arranged in the undercarriage, so that the space of the undercarriage cabin is greatly saved;

(2) because the local hydraulic source is close to the brake actuator, hydraulic pipelines from the landing gear cabin to the airplane wheels are reduced, and the weight of the airplane is reduced;

(3) because the local hydraulic source is close to the brake actuator, the quick response of the brake system when the pilot gives a brake instruction can be ensured.

While particular embodiments of the present invention have been described above, it will be understood by those skilled in the art that they are not intended to limit the invention, and that various modifications may be made by those skilled in the art based on the above disclosure without departing from the scope of the invention.

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