WO2019024398A1

WO2019024398A1 - Coupling device for inner and outer flaps

Info

Publication number: WO2019024398A1
Application number: PCT/CN2017/117727
Authority: WO
Inventors: 黄勇; 田忠良; 吴强; 邬旭辉
Original assignee: 中国商用飞机有限责任公司; 中国商用飞机有限责任公司上海飞机设计研究院
Priority date: 2017-07-31
Filing date: 2017-12-21
Publication date: 2019-02-07
Also published as: CN107161325B; CN107161325A

Abstract

A coupling device for inner and outer flaps, comprising: a piston cylinder assembly (2); a piston rod assembly (1), which is provided in the piston cylinder assembly and is radially fixed and axially movable relative to the piston cylinder assembly; an arc-shaped wedge member (3), which is fixed to the outer side of the piston cylinder assembly and comprises a first wedge squeezing surface (7); a concave ring (4), which is fixed to the outer side of the piston rod assembly and comprises a second wedge squeezing surface (8). When the first wedge squeezing surface is in contact with the second wedge squeezing surface, an axial force is generated, realizing forward buffering. The coupling device for the inner and outer flaps can realize an overtravel forward buffering function and is simple in structure and easy to mount and maintain.

Description

Inner and outer flap cross-linking device

Technical field

The invention relates to an inner and outer flap cross-linking device.

Background technique

Due to the length of the airport runway, the speed of the landing gear tires, and the safety of the aircraft's take-off and landing, the high-lift device has been continuously developed and widely used in modern large-scale aircraft design. The highly precise and complex motion mechanism and drive system disposed on the trailing edge compartment of the wing enables free transition of the high lift airfoil between the various aerodynamic configurations/card positions. The drive system is generally composed of a power output unit, a torque transmission line system and a high transmission ratio force/torque output actuator. The main force transmission member of the actuator is generally processed by a high-strength high-quality steel machine, and has a high durability mechanical mechanism. Performance, but fatigue resistance and initial defect crack propagation performance is poor. Ground maintenance personnel cannot perform effective damage checks without disassembling and disassembling the actuator during aircraft operations. Airworthiness regulations require that a single failure of such a system must be considered in the design (and no matter how low the probability of failure), and that the aircraft must continue to have safe flight and landing capabilities after a system failure.

Each trailing edge flap generally has more than two drive actuators. When one of the actuators has a disengagement fault, the airfoil will have a greater degree of tilt (mainly represented by the chordwise movement of the airfoil end ribs). When this deformation displacement is too large, the wings on both sides will generate a rolling moment that exceeds the balance ability of the aircraft, thereby impeding flight safety. A single-degree-of-freedom actuator, ie, inner and outer flap cross-linking device, is arranged between the inner and outer flaps to reduce the excessive tilt of the faulty airfoil and provide airfoil auxiliary restraint, thereby ensuring system failure. The aircraft still has the ability to continue safe flight and landing.

However, the prior art inner and outer flap cross-linking devices generally have a complicated structure and are inconvenient to install and maintain.

Summary of the invention

An object of the present invention is to overcome the defects of the existing inner and outer flap cross-linking device and to provide a new inner and outer flap cross-linking device, which can realize the over-stroke forward buffering function, and has a simple structure and easy installation and maintenance.

The above object of the present invention is achieved by an inner and outer flap cross-linking device, the inner and outer flap cross-linking device comprising:

Piston cylinder assembly;

a piston rod assembly disposed in the piston barrel assembly and radially fixed and axially movable relative to the cylinder barrel assembly;

An arcuate wedge member fixed to an outer side of the cylinder barrel assembly, the arcuate wedge member including a first wedge-shaped pressing surface;

a recessed ring, the recessed ring being fixed to an outer side of the piston rod assembly, the recessed ring comprising a second wedge-shaped pressing surface;

When the first wedge-shaped pressing surface is in contact with the second wedge-shaped pressing surface, an axial force is generated to achieve positive buffering.

According to the above technical solution, the inner and outer flap cross-linking device of the present invention can achieve the following beneficial technical effects: the over-stroke forward buffering function can be realized, and the structure is simple, and the installation and maintenance are easy.

Preferably, the piston barrel assembly is provided with a piston barrel serration at a central portion thereof, the piston rod assembly being provided with piston rod serrations at its outer ends, wherein the first wedge-shaped extrusion surface is When the second wedge-shaped pressing surface is in contact, a radial force is also generated to hold the piston barrel serration and the piston rod serration to achieve reverse locking.

According to the above technical solution, the inner and outer flap cross-linking device of the present invention can achieve the following beneficial technical effects: the over-travel reverse locking function can be realized.

Preferably, the piston barrel assembly is three separate centrally convex cylindrical barrel assemblies having radial elastic deformation capabilities.

Preferably, the inner and outer flap cross-linking device further comprises:

An axial stroke stop, the axial stroke stop being fixed to an outer side of the piston barrel assembly;

Detecting a sensor, the detecting sensor being fixed to the axial stroke stop;

a target, the target being fixed to the recess;

Wherein, when the distance between the detecting sensor and the target is less than a predetermined threshold, the detecting sensor sends an electrical signal to achieve overtravel detection.

According to the above technical solution, the inner and outer flap cross-linking device of the present invention can achieve the following beneficial technical effects: the overtravel detecting function can be realized.

Preferably, the axial stroke stop further comprises a first axial stop impact surface;

The recess further includes a second axial stop impact surface;

When the first axial stop impact surface is in contact with the second axial stop impact surface, a positive stop is achieved.

According to the above technical solution, the inner and outer flap cross-linking device of the present invention can achieve the following beneficial technical effects: the over-travel positive stop function can be realized.

Preferably, the inner and outer flap cross-linking device further comprises a radial spacer disposed between the arcuate wedge and the piston barrel assembly to achieve an outer diameter adjustment of the curved wedge pressing surface.

Preferably, the inner and outer flap cross-linking device further includes an axial spacer disposed between the recess and the piston rod assembly to achieve free stroke adjustment.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an inner and outer flap cross-linking apparatus according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing an inner and outer flap cross-linking apparatus according to an embodiment of the present invention.

List of reference signs

1. Piston rod assembly

2. Piston cylinder assembly

3, curved wedges

4, the groove

5, detection sensor

6, target

7, the first wedge extrusion surface

8, the second wedge extrusion surface

9, the first axial stop impact surface

10, the second axial stop impact surface

11, piston barrel serration

12, piston rod serration

13, axial stroke stop

Detailed ways

The specific embodiments of the present invention are described in the following detailed description of the embodiments of the present invention. It should be understood that in the actual implementation of any one embodiment, as in the course of any engineering project or design project, in order to achieve the developer's specific objectives, in order to meet system-related or business-related restrictions, A variety of specific decisions are often made, and this can change from one implementation to another. Moreover, it will also be appreciated that while the efforts made in such development may be complex and lengthy, the techniques disclosed in this disclosure will be apparent to those of ordinary skill in the art in view of this disclosure. Some design, manufacturing, or production changes made on the basis of the content are only conventional technical means, and it should not be understood that the content of the present disclosure is insufficient.

Unless otherwise defined, the technical terms or scientific terms used in the claims and the description should be construed in the ordinary meaning of the ordinary skill of the art. The words "first", "second" and similar terms used in the specification and claims of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. The words "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one. The words "including" or "comprising" or "comprises" or "comprises" or "an" Other components or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, nor are they limited to Is it a direct or indirect connection?

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an inner and outer flap cross-linking apparatus according to an embodiment of the present invention. Figure 2 is a cross-sectional view showing an inner and outer flap cross-linking apparatus according to an embodiment of the present invention.

As shown in Figures 1-2, in accordance with an exemplary, but non-exclusive, embodiment of the present invention, the inner and outer flap cross-linking apparatus includes:

Piston cylinder assembly 2;

a piston rod assembly 1, the piston rod assembly 1 is disposed in the piston barrel assembly 2, and is radially fixed and axially movable relative to the cylinder barrel assembly 2;

a curved wedge member 3, the arcuate wedge member 3 is fixed on the outer side of the piston barrel assembly 2, the curved wedge member 3 includes a first wedge-shaped pressing surface 7;

a recess 4, the recess 4 is fixed on the outer side of the piston rod assembly 1, the recess 4 includes a second wedge-shaped pressing surface 8;

When the first wedge-shaped pressing surface 7 is in contact with the second wedge-shaped pressing surface 8, an axial force is generated to achieve positive buffering.

Thus, the inner and outer flap cross-linking device of the present invention can realize the over-stroke forward buffering function, and has a simple structure and easy installation and maintenance. Moreover, the inner and outer flap cross-linking device of the present invention is small in size and light in weight.

When any driving actuator of the trailing edge flap is disengaged, the inner and outer flap cross-linking device of the invention can reduce the excessive tilt of the faulty airfoil and avoid the unfavorable vibration of the faulty airfoil to meet the airworthiness regulations. Continued safe flight and landing capability requirements for a single actuator of the aircraft flap to disengage.

Specifically, when any drive actuator of the trailing edge flap is disengaged, the distance between the two inner and outer flap cross-linking devices respectively fixed to the mounting points of the inner and outer flap end ribs will be elongated or shortened. The change causes the piston rod assembly 1 to stretch or compress in the axial direction relative to the cylinder barrel assembly 2.

Preferably, the inner and outer flap cross-linking device further comprises:

The axial stroke stopper 13 and the axial stroke stopper 13 are fixed on the outer side of the cylinder barrel assembly 2;

a detecting sensor 5, the detecting sensor 5 is fixed on the axial stroke stopper 13;

Target 6, the target 6 is fixed on the recess 4;

Wherein, when the distance between the detecting sensor 5 and the target 6 is less than a predetermined threshold, the detecting sensor 5 sends an electric signal to realize the overtravel detecting of the distance between the two mounting points of the inner and outer flap cross-linking device.

Preferably, the axial stroke stop 13 further includes a first axial stop impact surface 9;

The recess 4 further includes a second axial stop impact surface 10;

When the first axial stop impact surface 9 is in contact with the second axial stop impact surface 10, a positive stop is achieved.

Specifically, when the piston rod assembly 1 moves overtravel in any direction with respect to the cylinder barrel assembly 2, and the distance between the detecting sensor 5 and the target 6 is less than a predetermined threshold, the detecting sensor 5 will emit an electrical signal to realize overtravel detection. . Next, the first wedge-shaped pressing surface 7 of the curved wedge member 3 is brought into contact with the second wedge-shaped pressing surface 8 of the recessed ring 4 to generate an axial force to achieve positive (axial) cushioning. Finally, the first axial stop impact surface 9 of the axial travel stop 13 is in contact with the second axial stop impact surface 10 of the recess 4 to effect a positive (axial) stop.

Preferably, the inner and outer flap cross-linking device of the present invention has an axis substantially along the chord of the flap, the rear end is attached to the inner flap end rib, and the front end is attached to the outer flap end rib. The free travel stroke limit along the axial direction needs to be determined by combining the full-stroke multi-body dynamics and finite element deformation simulation results. The free motion stroke limit needs to cover the change of the distance between the two installation points of the inner and outer flap cross-linking device caused by the difference of the flap motion mechanism and the aerodynamic load in the full stroke range, and the inner and outer flap cross-linking device must not obstruct the flap Normal use.

Preferably, the piston barrel assembly 2 is provided with a piston barrel serration 11 at its inner central portion, and the piston rod assembly 1 is provided with piston rod serrations 12 at its outer ends, wherein the first wedge-shaped extrusion of the curved wedge member 3 When the face 7 is in contact with the second wedge-shaped pressing face 8 of the recess 4, a radial force is also generated to hold the piston serration 11 and the piston rod serration 12 to achieve reverse locking.

That is to say, according to the above preferred embodiment of the present invention, the inner and outer flap cross-linking device can provide an overtravel reverse lock function in addition to the overtravel target proximity detection and forward buffer stop function.

Preferably, the piston barrel assembly 2 is a three-part, split, centrally convex piston barrel assembly, piston The cartridge assembly 2 has a radial elastic deformation ability.

In this way, the piston serration 11 and the piston rod serration 12 can be better gripped under radial force.

Preferably, the piston barrel assembly 2 is a centrally convex pre-deformed piston barrel assembly.

Thus, the piston barrel assembly 2 has a certain convex shape and/or a certain pre-deformation in the middle, so that when the first wedge-shaped pressing surface 7 of the curved wedge member 3 and the second wedge-shaped pressing surface of the recessed ring 4 At the time of contact, a radial force is also generated to hold the piston serration 11 and the piston rod serration 12 to achieve reverse locking. That is to say, the above-mentioned central convex pre-deformation of the cylinder barrel assembly 2 provides a margin for the piston barrel serrations 11 and the piston rod serrations 12 to be gripped.

Preferably, the cylinder barrel assembly 2 and the recessed ring 4 are made of a high strength metal material, such as a Ti-6Al-4V material.

Preferably, the piston serration 11 and the piston rod serration 12 are made of a high strength metal material, such as Ti-6Al-4V material.

Of course, the above Ti-6Al-4V material is only a preferred material form of the piston barrel assembly, the recessed ring, the piston barrel serration and/or the piston rod serration in the inner and outer flap cross-linking device of the present application, and those skilled in the art are It is to be understood on the basis of the disclosure of the present application that other suitable materials may be employed without departing from the scope of the invention as claimed.

Preferably, the detecting sensor 5 is a proximity detecting sensor.

Preferably, the inner and outer flap cross-linking device further comprises a radial gasket (for example, a metal peelable gasket) disposed between the curved wedge member 3 and the cylinder barrel assembly 2 to realize the curved wedge-shaped pressing surface. Outer diameter adjustment.

Thus, by adding (arranging) a radial spacer between the curved wedge member and the cylinder barrel assembly, the outer diameter of the first wedge-shaped pressing surface of the curved wedge member can be changed, and the buffer field external field adjustment can be better achieved. .

Preferably, the inner and outer flap cross-linking device further includes an axial spacer (e.g., a metal spacer) disposed between the recess 4 and the piston rod assembly 1 to achieve free stroke adjustment.

Thus, by adding (disposing) the axial spacer between the recess and the piston rod assembly, the free stroke adjustment can be better achieved.

Some exemplary embodiments have been described above. However, it should be understood that it can be made Various modifications. For example, if the described techniques are performed in a different order and/or if the components of the described systems, architecture, devices, or circuits are combined and/or replaced or supplemented with additional components or equivalents thereof, A suitable result can be achieved. Accordingly, other embodiments are also intended to fall within the scope of the appended claims.

Claims

An inner and outer flap cross-linking device comprising:

Piston cylinder assembly;

a piston rod assembly disposed in the piston barrel assembly and radially fixed and axially movable relative to the cylinder barrel assembly;

An arcuate wedge member fixed to an outer side of the cylinder barrel assembly, the arcuate wedge member including a first wedge-shaped pressing surface;

a recessed ring, the recessed ring being fixed to an outer side of the piston rod assembly, the recessed ring comprising a second wedge-shaped pressing surface;

When the first wedge-shaped pressing surface is in contact with the second wedge-shaped pressing surface, an axial force is generated to achieve positive buffering.
The inner and outer flap cross-linking device according to claim 1, wherein said piston barrel assembly is provided with a piston barrel serration at a central portion thereof, said piston rod assembly being provided with piston rod serrations at both outer sides thereof, wherein When the first wedge-shaped pressing surface is in contact with the second wedge-shaped pressing surface, a radial force is also generated to hold the piston barrel serration and the piston rod serration to achieve reverse locking.
The inner and outer flap cross-linking device of claim 2 wherein said piston barrel assembly is three separate centrally convex cylindrical barrel assemblies, said piston barrel assembly having a radially elastically deformable capability.
The inner and outer flap cross-linking device according to any one of claims 1 to 3, wherein the inner and outer flap cross-linking device further comprises:

An axial stroke stop, the axial stroke stop being fixed to an outer side of the piston barrel assembly;

Detecting a sensor, the detecting sensor being fixed to the axial stroke stop;

a target, the target being fixed to the recess;

Wherein, when the distance between the detecting sensor and the target is less than a predetermined threshold, the detecting sensor sends an electrical signal to achieve overtravel detection.
The inner and outer flap cross-linking device according to claim 4, wherein

The axial stroke stop further includes a first axial stop impact surface;

The recess further includes a second axial stop impact surface;

When the first axial stop impact surface is in contact with the second axial stop impact surface, a positive stop is achieved.
The inner and outer flap cross-linking device according to any one of claims 1 to 3, wherein the inner and outer flap cross-linking device further comprises a curved wedge member and the piston barrel assembly A radial spacer is provided to achieve an outer diameter adjustment of the curved surface of the curved wedge.
The inner and outer flap cross-linking device according to any one of claims 1 to 3, wherein the inner and outer flap cross-linking device further comprises a groove disposed between the recess and the piston rod assembly Axial spacers for free travel adjustment.