阅读说明：本技术 一种吊舱减振器及减振系统 (Nacelle shock absorber and shock absorption system ) 是由 于昊钲 刘宏旭 温庆荣 于 2021-09-10 设计创作，主要内容包括：本发明提出了一种吊舱减振器及减振系统。吊舱减振器包括：固定减振盘、游动减振盘和多组弹性组件。其中,固定减振盘与吊舱外部框架连接,游动减振盘与吊舱内部负载框架连接,固定减振盘和游动减振盘通过多组弹性组件连接。根据本发明的吊舱减振器及减振系统,采用将减振器直接连接到吊舱内框架的方式,可以提高对吊舱负载端的减振效果,并且采用此方式可以降低整机安装高度,降低重心；而且,采用尼龙绳串接弹性组件,可以将弹簧吸收振动后反复反弹的多余能量吸收,提高减振器稳定性；另外,固定减振盘的偏心设计,抵消由于负载重力原因带来重心偏移问题。(The invention provides a nacelle shock absorber and a shock absorbing system. The nacelle damper includes: the damping device comprises a fixed damping disc, a moving damping disc and a plurality of groups of elastic components. The fixed damping disk is connected with the outer frame of the nacelle, the floating damping disk is connected with the inner load frame of the nacelle, and the fixed damping disk and the floating damping disk are connected through a plurality of groups of elastic components. According to the nacelle shock absorber and the shock absorption system, the shock absorber is directly connected to the inner frame of the nacelle, the shock absorption effect on the load end of the nacelle can be improved, and the mounting height of the whole machine and the center of gravity can be reduced by adopting the mode; moreover, the nylon rope is connected with the elastic component in series, so that redundant energy which is repeatedly rebounded after the spring absorbs vibration can be absorbed, and the stability of the shock absorber is improved; in addition, the eccentric design of the fixed damping disk offsets the problem of center of gravity shift due to the gravity of the load.)

1. A pod vibration absorber, wherein the pod is secured to an aircraft by an external frame, the vibration absorber comprising:

a fixed damping disc connected to an outer frame of the nacelle;

a traveling damper disk connected to an internal load frame of the nacelle;

and the fixed damping disc and the moving damping disc are connected through the plurality of groups of elastic components.

2. The pod vibration absorber of claim 1 wherein the fixed damping disk is circumferentially spaced apart and provided with a first plurality of securing portions, and the floating damping disk is circumferentially spaced apart and provided with a second plurality of securing portions, the plurality of sets of spring assemblies being connected between the fixed damping disk and the floating damping disk by the first plurality of securing portions and the second plurality of securing portions.

3. A pod shock absorber according to claim 2, wherein each set of said elastic assembly comprises two springs, first ends of both said springs being connected to a corresponding one of said first fixing portions, second ends of both said springs being connected to two adjacent second fixing portions, respectively.

4. The pod vibration absorber of claim 2 wherein the fixed damping disc is circumferentially spaced apart by a plurality of first recesses, the first fixing portions being fixed to corresponding first recesses; the periphery of the moving damping disc is provided with a plurality of second grooves at intervals, and the second fixing parts are fixed in the corresponding second grooves.

5. The pod vibration absorber of claim 1 wherein the fixed damping disc is a hollow regular polygon.

6. The pod vibration absorber of claim 5 wherein the center of gravity of the fixed damping disk is not at a geometric center.

7. The pod vibration absorber of claim 2 wherein a bumper is provided between the fixed and floating damping disks for collision avoidance.

8. The pod vibration absorber of claim 1 wherein the floating damper disk is annular and the outer perimeter of the floating damper disk is greater than the outer perimeter of the fixed damper disk.

9. The pod shock absorber of claim 1, further comprising: the nylon rope is connected with each group of elastic components in series.

10. A damping system for a pod, the damping system comprising: two sets of shock absorbers, provided between the outer nacelle frame and the inner load frame of the nacelle, for the damping of the nacelle, said shock absorbers being according to any of claims 1-9 for a nacelle.

Technical Field

The invention relates to the technical field of airborne pod equipment, in particular to a pod shock absorber and a shock absorption system.

Background

A nacelle is a device suspended from a fuselage or wing for carrying photovoltaic loads. During the flying process of the airplane, the vibration generated by an engine and the great flying attitude conversion in the air affect the stability of the optical axis of the photoelectric load of the nacelle, so that the pointing accuracy and the imaging quality of the photoelectric load are deteriorated. Aircraft pods are typically equipped with vibration dampers to maintain the optical axis stability of the pod's photovoltaic loads. However, the vibration absorber of the conventional nacelle is arranged between the tail of the nacelle and an interface of an airplane providing machine, the gravity center of the nacelle is difficult to be consistent with the vibration absorber in a moving state, attitude coupling vibration is easy to generate, and the imaging function of photoelectric load of the nacelle is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of improving the vibration reduction effect of a nacelle. The invention provides a nacelle damper and a damping system.

A pod shock absorber according to an embodiment of the present invention includes: the damping device comprises a fixed damping disc, a moving damping disc and a plurality of groups of elastic components. The fixed damping disk is connected with the outer frame of the nacelle, the floating damping disk is connected with the inner load frame of the nacelle, and the fixed damping disk and the floating damping disk are connected through a plurality of groups of elastic components.

According to some embodiments of the present invention, the fixed damping disk is provided at intervals with a plurality of first fixing portions, the floating damping disk is provided at intervals with a plurality of second fixing portions, and the plurality of sets of elastic members are connected between the fixed damping disk and the floating damping disk through the plurality of first fixing portions and the plurality of second fixing portions.

According to some embodiments of the invention, each set of the elastic assemblies includes two springs, first ends of the two springs are connected to the same corresponding first fixing portion, and the other ends of the two springs are respectively connected to two adjacent second fixing portions.

According to some embodiments of the invention, the periphery of the fixed damping disk is provided with a plurality of first grooves at intervals, and the first fixing parts are fixed in the corresponding first grooves; the periphery of the moving damping disc is provided with a plurality of second grooves at intervals, and the second fixing parts are fixed in the corresponding second grooves.

According to some embodiments of the invention, the fixed damping disk is a hollow regular polygon. The fixed damping disk is hollow, so that the weight of the fixed damping disk can be reduced.

According to some embodiments of the invention, the center of gravity of the fixed damping disk is not at the geometric center. This design can counteract the problem of center of gravity shift due to the weight of the pod load.

According to some embodiments of the invention, a buffer for collision prevention is provided between the fixed damping disc and the travelling damping disc.

According to some embodiments of the invention, the floating damper disc is annular and the outer perimeter of the floating damper disc is greater than the outer perimeter of the fixed damper disc.

According to some embodiments of the invention, the shock absorber further comprises a nylon cord, the nylon cord connecting the sets of elastomeric assemblies in series.

Based on the same inventive concept, the invention also provides a vibration damping system, comprising: and the two groups of vibration dampers are arranged between the outer frame of the nacelle and the inner load frame of the nacelle and are used for damping the nacelle.

The beneficial effects of the shock absorber provided by the invention comprise that:

firstly, the vibration damper is directly connected to the inner frame of the nacelle, so that the vibration damping effect on the load end of the nacelle can be improved, and the mounting height and the center of gravity of the whole machine can be reduced by adopting the mode;

secondly, the nylon rope is connected with the elastic component in series, so that redundant energy which is repeatedly rebounded after the spring absorbs vibration can be absorbed, and the stability of the shock absorber is improved;

thirdly, the eccentric design of the fixed damping disc counteracts the gravity center shift problem caused by the load gravity.

Drawings

FIG. 1 is a schematic diagram of the overall construction of a shock absorber in accordance with an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the elastic member, the fixing portion and the recess for fixing the damping plate according to the embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of a shock absorber according to an embodiment of the present invention;

FIG. 4 is a top view of a partial structure of a shock absorber according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first fixing portion according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a pod with a damping system according to an embodiment of the present invention.

Reference numerals:

in the nacelle shock absorber 100, the vibration damping material,

a fixed damping plate 110, a first groove 111, a first fixing portion 112,

a floating damping plate 120, a second recess 121, a second fixing portion 122,

the elastic member 130 is provided at a position where,

the length of the nylon rope 140 is selected,

the rubber mat 150 is provided with a rubber mat,

damping system 1000, outer frame 300, inner load frame 400, nacelle 500.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, a nacelle 500 shock absorber 100 according to an embodiment of the present invention includes: a fixed damping plate 110, a floating damping plate 120 and a plurality of sets of spring assemblies 130. The fixed damping disk 110 is connected to the nacelle outer frame 300, the floating damping disk 120 is connected to the nacelle inner load frame 400, and the fixed damping disk 110 and the floating damping disk 120 are connected by a plurality of sets of elastic members 130. The fixed damper disk 110 and the nacelle outer frame 300, and the traveling damper disk 120 and the nacelle inner load frame 400 are fixedly connected by means of screws or the like. In most cases, nacelle outer frame 300 is of a U-shaped structural design. It will be appreciated that the shape of nacelle outer frame 300 can be designed according to actual needs.

In the present invention, nacelle 500 shock absorber 100 having multiple sets of spring assemblies 130 is mounted directly between nacelle outer frame 300 and nacelle inner load frame 400 to achieve damping of nacelle 500. Because the shock absorber 100 can directly act on the internal load of the nacelle 500, the transmission stage number of the shock absorber 100 is reduced, the vibration caused by the load of the nacelle 500 due to the airplane vibration or the large-amplitude flight attitude conversion is reduced to a greater extent, and the stable and reliable work of the internal load of the nacelle 500 is ensured, so that the stability of the optical axis of the photoelectric load in the nacelle 500 is ensured, and the image quality is ensured.

According to some embodiments of the present invention, as shown in fig. 1 and 2, a plurality of first fixing portions 112 are spaced apart from each other around the fixed damping plate 110, a plurality of second fixing portions 122 are spaced apart from each other around the floating damping plate 120, and a plurality of sets of elastic members 130 are connected between the fixed damping plate 110 and the floating damping plate 120 through the plurality of first fixing portions 112 and the plurality of second fixing portions 122. The number of the first fixing portions 112 and the second fixing portions 122 may be equal or different.

For example, the first and second fixing portions 112 and 122 may be hard hooks, and as shown in fig. 2 and 5, the first fixing portion 112 is fixedly mounted to the fixed damping plate 110 by screws. The structure and fixing manner of the second fixing portion 122 are similar to those of the first fixing portion 112, and are not described herein again. By arranging the first fixing portion 112 and the second fixing portion 122, it is beneficial for the multiple sets of elastic components 130 to connect the fixed damping disk 110 and the floating damping disk 120, and the convenience and reliability of assembling the damper 100 are improved. Generally, the first fixing portion 112 and the second fixing portion 122 are disposed on the respective vibration disks at equal intervals.

According to some embodiments of the present invention, each set of elastic members 130 includes two springs, as shown in fig. 1 and 2, first ends of the two springs are connected to the same corresponding first fixing portion 112, and second ends of the two springs are connected to two adjacent second fixing portions 122, respectively. As can be seen from fig. 1, each set of springs is suspended on a first fixing portion 112 and two second fixing portions 122, and the first fixing portion 112 and the second fixing portions 122 are preferably arranged in a staggered manner, so that the plurality of sets of springs can be distributed in the air more uniformly and connected with the fixed damping disk 110 and the floating damping disk 120 at an inclined angle, which is more beneficial to damping the load of the nacelle 500 by using the inertia of the springs. The multiple groups of springs are important parts of the nacelle 500 shock absorber 100, and the number of the multiple groups of springs is preferably 7-13, so that the multiple groups of springs are suitable for the volume of the airborne nacelle 500 and achieve a better shock absorption effect.

According to some embodiments of the present invention, the fixed damping plate 110 is provided with a plurality of first grooves 111 at intervals on the periphery thereof, and the first fixing portions 112 are fixed to the corresponding first grooves 111; a plurality of second grooves 121 are formed at intervals around the floating damping plate 120, and second fixing portions 122 are fixed to the corresponding second grooves 121. The first recess 111 is provided in the fixed damping disk 110 to facilitate the installation of the first fixing portion 112 and reduce the weight of the fixed damping disk 110. Also, the second recess 121 is provided in the floating damping plate 120, which facilitates the installation of the second fixing portion 122 and reduces the weight of the floating damping plate 120.

According to some embodiments of the present invention, the fixed damping disk 110 is a hollow regular polygon. The weight of the fixed damping plate 110 can be reduced by providing the fixed damping plate 110 as a hollow, as shown in fig. 1.

According to some embodiments of the present invention, the center of gravity of the fixed damping disk 110 is not at the geometric center. This design can counteract the center of gravity shift problem due to the weight of the nacelle 500 load.

According to some embodiments of the present invention, a buffer for collision prevention is provided between the fixed damping disc 110 and the floating damping disc 120. The damper may be fixedly disposed at the edge portion and the hollow portion of the damping disk for isolating the rigid collision of the fixed damping disk 110 and the floating damping disk 120. The buffer may be a rubber pad 150, as shown in fig. 3 and 4. It should be noted that the buffer member may also be other members having a buffering function, such as sponge, plastic, etc.

According to some embodiments of the present invention, the floating damper disk 120 is annular in shape and the outer perimeter of the floating damper disk 120 is greater than the outer perimeter of the fixed damper disk 110. The ring shape can reduce the weight of the floating damping disk 120, and the structural design that the outer circumference is greater than the outer circumference of the fixed damping disk 110 facilitates the connection of the spring, and the elasticity of the spring can be fully utilized to realize damping.

According to some embodiments of the present invention, shock absorber 100 further comprises nylon cords 140, nylon cords 140 being connected in series with each set of elastomeric assemblies 130. The nylon rope 140 is connected in series with each group of elastic components 130, so that the repeated rebounding energy of the spring after the spring absorbs the vibration can be inhibited, and the stability of the shock absorber is improved.

Based on the same inventive concept, as shown in fig. 6, the present invention further provides a damping system 1000, comprising: two sets of shock absorbers 100, two sets of shock absorbers 100 being provided between outer frame 300 of nacelle 500 and inner load frame 400 of nacelle 500, are used for damping of nacelle 500.

In summary, the vibration damper and the vibration damping system 1000 of the nacelle 500 according to the present invention have the following advantages:

firstly, the vibration isolation and damping effect on the load end of the nacelle 500 can be improved by directly connecting the nacelle damper 100 to the inner frame of the nacelle 500, and the installation height of the whole machine and the center of gravity can be reduced by adopting the mode;

secondly, the nylon rope is connected with the elastic component in series, so that redundant energy which is repeatedly rebounded after the spring absorbs vibration can be absorbed, and the stability of the shock absorber is improved;

thirdly, the eccentric design of the fixed damping disc counteracts the gravity center shift problem caused by the load gravity.

While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.