All-metal vibration isolation buffer device for spaceborne equipment protection and working method thereof

Abstract

The application provides a full-metal vibration isolation and buffering device for spaceborne equipment protection and a working method thereof.The device comprises a bearing base, a center disc arranged at the center of the bearing base, a buffering pad arranged between the center disc and the bearing base, a plurality of vibration isolation structures circumferentially and uniformly distributed on the outer periphery of the center disc, and the vibration isolation structures are in telescopic connection with the center disc.The device has excellent high and low temperature resistance, fatigue resistance and omnidirectional vibration isolation and buffering performance, and can provide efficient and stable vibration isolation and buffering effect in extreme environments.The full-metal and multidirectional vibration isolation and buffering structure of the device can replace traditional rubber vibration isolators, and is applied to fields of spaceborne equipment, aerospace, precision instruments, ship equipment and high-speed transportation, so as to reduce the influence of vibration on key equipment, improve the stability and service life of the system, and meet the application requirements of high reliability and long service life.

Description

TECHNICAL FIELD

[0001] The application relates to a full-metal vibration isolation and buffering device for spaceborne equipment protection and a working method. BACKGROUND

[0002] With the progress of aerospace technology, spaceborne equipment will face more severe environments and vibration impact loads, which are easy to cause equipment damage, so it is necessary to protect the stability of the equipment by using a vibration isolation device. The existing traditional vibration isolation device uses rubber or other high polymer. The high-temperature resistance and anti-aging ability are weak, and the performance is easy to decline in extreme environments. In the face of nonlinear vibration and impact load from multiple directions and complex environments, the damping characteristics and mechanical properties are difficult to meet the needs of high-performance spaceborne equipment, which may lead to a decrease in the vibration isolation and buffering effect, and further affect the normal operation of the spaceborne equipment. The problems and defects of the existing traditional spaceborne vibration isolation device mainly include: (1) the spaceborne equipment will experience extreme temperature changes, vacuum environment and radiation in space. The rubber material in the traditional vibration isolation device is easy to harden and lose elasticity at extremely low temperature, and may soften or age at high temperature, resulting in a decrease in the vibration isolation performance. Moreover, the rubber material is easy to creep or fatigue fracture under long-term vibration, resulting in a gradual decrease in the vibration isolation and buffering performance, which cannot meet the long-term operation requirements of the spaceborne equipment. (2) The traditional spaceborne vibration isolation device has insufficient multi-directional vibration isolation capacity. Usually, only the vibration impact in a specific direction is optimized, and it is difficult to effectively suppress the vibration impact interference from multiple degrees of freedom in the complex space environment. This limitation may affect the stability and reliability of the spaceborne equipment. (3) Some spaceborne vibration isolation devices use metal rubber as a vibration isolation element. During installation, the metal rubber is connected with the equipment by using compression, clamping or bolt fixing and the like, and friction is generated during the installation process. Meanwhile, under the action of the vibration load, the metal rubber and the contact surface are easy to slip. The combined action of the friction and the slip may cause the wear of the contact surface and the metal wire structure, thereby weakening the vibration isolation performance and affecting the long-term reliability of the assembly. SUMMARY

[0003] In view of this, the purpose of the application is to provide a full-metal vibration isolation and buffering device for spaceborne equipment protection and a working method, which solves the problems proposed in the background.

[0004] The application adopts the following scheme: a full-metal vibration isolation and buffering device for spaceborne equipment protection: a bearing base is arranged, a center disc is arranged on the center of the bearing base, a buffer pad is arranged between the center disc and the bearing base, a plurality of vibration isolation structures are circumferentially arranged on the outer periphery of the center disc, and the vibration isolation structures are connected with the center disc in an extension mode.

[0005] Further, a circular groove is arranged on the bearing base, the center disc is arranged on the middle of the groove bottom, the outer periphery of the vibration isolation structure abuts on the groove wall, and the buffer pad is clamped between the center disc and the groove bottom.

[0006] Further, the vibration isolation structure comprises a vertically arranged connecting plate, a center connecting shaft is arranged on the connecting plate, the two ends of the center connecting shaft extend out of the plate body on the same side of the connecting plate, and a conical metal rubber damping piece is arranged on the two ends of the center connecting shaft.

[0007] Further, the large circular end of the conical metal rubber damping piece abuts on the connecting plate, a large circular end cover is arranged on the middle of the large circular end of the conical metal rubber damping piece, and a small circular end cover is arranged on the middle of the small circular end of the conical metal rubber damping piece.

[0008] Further, the end of the center connecting shaft penetrates through the large circular end cover and the conical metal rubber damping piece on the same side and is screwed on the small circular end cover.

[0009] Further, the plate body of the connecting plate extends out of the area clamped by the large circular ends of the two conical metal rubber damping pieces towards the edge of the center disc, a fixing plate is connected to the extended edge, the area clamped by the large circular ends of the two conical metal rubber damping pieces is located on the plate body of the connecting plate away from the edge of the center disc, and an extension structure is connected between the fixing plate and the center disc.

[0010] Further, the extension structure comprises an extension sleeve, one end of the extension sleeve is closed, a screw hole is arranged in the other end of the extension sleeve, a screw rod is screwed on the screw hole end of the extension sleeve, the other end of the screw rod is rotationally connected to the fixing plate, a connecting rod is arranged on the closed end of the extension sleeve, and the connecting rod is fixed on the outer periphery of the center disc.

[0011] Further, a plurality of upper annular cavities with diameters increasing in sequence are arranged on the upper pad surface of the buffer pad from the middle to the outside, a plurality of lower annular cavities with diameters increasing in sequence are arranged on the lower pad surface of the buffer pad from the middle to the outside, the upper annular cavities and the lower annular cavities are staggered, and the upper annular cavities and the lower annular cavities divide the buffer pad into a corrugated disc.

[0012] Further, the buffer pad is made of metal rubber.

[0013] A kind of for the use method of full metal vibration isolation buffer device of spaceborne equipment protection: when using, the end of protected element is arranged on center disc, when being subjected to vibration or impact load, vibration energy in horizontal direction is evenly dispersed to conical metal rubber damping piece from center disc through telescopic structure, can absorb and relieve vibration energy transmitted to structure;Vibration energy in vertical direction causes the up and down vibration of device, at this time, conical metal rubber damping piece produces rolling, reduces the friction and abrasion of device;Bottom buffer pad produces deformation by corrugated surface, weakens vibration transmission, annular cavity absorbs and disperses impact or vibration energy by compression, reduces instantaneous stress peak value and energy transmission, reduces the damage of equipment or structure.

[0014] Compared with prior art, the present application has the following beneficial effects: through the uniform arrangement of vibration isolation structure and telescopic structure along circumference, effective vibration isolation in horizontal direction is realized, buffer pad provides excellent vibration isolation and buffering effect in vertical direction, and the two are combined to realize omnidirectional vibration isolation function. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of embodiment of the present application;

[0016] Figure 2 It is the explosion structural schematic diagram of vibration isolation structure of embodiment of the present application;

[0017] Figure 3 It is the structural schematic diagram of telescopic structure of embodiment of the present application;

[0018] Figure 4 It is the structural schematic diagram of buffer pad of embodiment of the present application;

[0019] Figure 5 It is Figure 4 A-A section view structural schematic diagram of embodiment of the present application;

[0020] Figure 6 It is the structural schematic diagram of wire mesh internal unit structure of embodiment of the present application.

[0021] In the figure: 1-bear base;2-center disc;3-buffer pad;4-vibration isolation structure;5-round groove;6-connection plate;7-center connecting shaft;8-conical metal rubber damping piece;9-large round end end cover;10-small round end end cover;11-fixed plate;12-telescopic structure;13-telescopic sleeve;14-screw hole;15-screw;16-connection rod;17-tight nail bolt;18-upper annular cavity;19-lower annular cavity. DETAILED DESCRIPTION

[0022] The present application is further described below in connection with the drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] like Figures 1-6 As shown, an all-metal vibration isolation and buffer device for the protection of spaceborne equipment includes a support base 1, a central disk 2 disposed at the center of the support base, a buffer pad 3 sandwiched between the central disk and the support base, and several vibration isolation structures 4 evenly distributed around the outer circumference of the central disk. The vibration isolation structures are telescopically connected to the central disk. In use, the end of the protected element is placed on the central disk. When subjected to vibration or impact loads, the vibration energy in the horizontal direction is evenly distributed from the central disk to the vibration isolation structure, which can absorb and alleviate the vibration energy transmitted to the structure. The buffer pad at the bottom absorbs and disperses the impact or vibration energy through compression, reducing the instantaneous stress peak and energy transmission, and reducing damage to the equipment or structure.

[0026] In this embodiment, the specific structure of the bearing base is as follows: a circular groove 5 is provided on the bearing base, the central disk is provided on the middle part of the bottom of the circular groove, the outer periphery of the vibration isolation structure abuts against the wall of the circular groove, and the buffer pad is sandwiched between the central disk and the bottom of the circular groove, that is, the central disk is attached to the buffer pad or fixed to the buffer pad by bolts.

[0027] In this embodiment, to achieve vibration isolation of the vibration isolation structure, the vibration isolation structure includes a vertically arranged connecting plate 6, through which a central connecting shaft 7 passes. Both ends of the central connecting shaft extend out of the plate on the same side. A frustum-shaped metal rubber damping element 8 is installed on both ends of the central connecting shaft. The frustum-shaped metal rubber damping element abuts against the wall of the circular groove and can roll up and down along the wall of the circular groove. The specific installation method of the frustum-shaped metal rubber damping element can be that the frustum-shaped metal rubber damping element is rotatably connected to the shaft of the central connecting shaft extending out of the connecting plate, so that when subjected to vibration or impact load, the vibration energy in the vertical direction causes the device to vibrate up and down. At this time, the frustum-shaped metal rubber damping element rolls, thereby effectively reducing surface friction and wear and improving service life.

[0028] In the embodiment, in order to realize the installation of the conical frustum metal rubber damping piece, the large circular end of the conical frustum metal rubber damping piece is attached to the connecting plate, a large circular end cover 9 is installed on the middle part of the large circular end of the conical frustum metal rubber damping piece, the large circular end cover is rotationally connected to the connecting plate, a small circular end cover 10 is installed on the middle part of the small circular end of the conical frustum metal rubber damping piece, that is, the large circular end and the small circular end of the conical frustum metal rubber damping piece are both provided with end cover installation grooves, the large circular end cover and the small circular end cover are both arranged in the corresponding installation grooves, the large circular end cover and the small circular end cover are used to limit the conical frustum metal rubber damping piece in the axial direction of the center connecting shaft, so as to facilitate the installation of the conical frustum metal rubber damping piece.

[0029] In the embodiment, the conical frustum metal rubber damping piece is a rotary body structure with an arc-shaped outer wall surface, so that it can be closely attached to the rigid bearing base, and when the device is installed and moves up and down under the action of vibration, the structure can produce a certain degree of rolling, thereby effectively reducing surface friction and wear and prolonging the service life.

[0030] In the embodiment, in order to design reasonably, the end of the center connecting shaft penetrates through the large circular end cover and the conical frustum metal rubber damping piece on the same side and is screwed to the small circular end cover, that is, the large circular end cover and the conical frustum metal rubber damping piece are rotationally connected to the center connecting shaft, and the small circular end cover can rotate in the small circular end installation groove; at the same time, the small circular end cover is fixed to the center connecting shaft to avoid the conical frustum metal rubber damping piece from coming out.

[0031] In the embodiment, in order to avoid interference, the plate body of the connecting plate extends towards the edge of the center disc on both sides of the area clamped by the large circular ends of the two conical frustum metal rubber damping pieces, and a fixed plate 11 is connected to the extended edge, and the edges of the connecting plate other than the edge towards the center disc are located in the area clamped by the large circular ends of the two conical frustum metal rubber damping pieces, that is, except for the edge of the plate body of the connecting plate towards the center disc, the other edges do not exceed the area clamped by the large circular ends of the two conical frustum metal rubber damping pieces, so as to avoid the collision between the connecting plate and the inner wall of the circular groove, and a telescopic structure 12 is connected between the fixed plate and the center disc, that is, when subjected to vibration or impact load, the vibration energy in the horizontal direction is uniformly dispersed from the center disc to the conical frustum metal rubber damping pieces through the telescopic structure, so as to absorb and relieve the vibration energy transmitted to the structure.

[0032] In this embodiment, the specific structure of the telescopic structure is as follows: the telescopic structure includes a telescopic sleeve 13, one end of which is closed, and the other end has a screw hole 14. A screw rod 15 is screwed onto the screw hole end of the telescopic sleeve, and the other end of the screw rod is rotatably connected to a fixed plate. A connecting rod 16 is installed on the closed end of the telescopic sleeve, and the other end of the connecting rod is fixed to the outer periphery of the central plate. At the same time, a fastening screw hole communicating with the screw hole is opened on the outer wall of the telescopic sleeve. A fastening bolt 17 for further fixing the screw rod is screwed into the fastening screw hole. The telescopic structure can adjust the pre-tightening of the length control device, so that the external load can be more evenly distributed to each vibration isolation element through the adjustable pre-tightening support leg, reducing local overload phenomenon and improving the stability and service life of the overall structure.

[0033] In this embodiment, the upper surface of the buffer pad has a plurality of upper annular cavities 18 with progressively increasing diameters arranged from the center outwards, and the lower surface of the buffer pad has a plurality of lower annular cavities 19 with progressively increasing diameters arranged from the center outwards. The upper and lower annular cavities are arranged alternately, dividing the buffer pad into a corrugated disk. The annular structure makes the stress distribution more uniform, and the corrugated structure design allows it to withstand larger elastic deformation. The internal cavities reduce local stiffness, and when subjected to vibration or impact, the cavities deform, weakening the vibration transmission. At the same time, the cavities absorb and disperse impact or vibration energy through compression, reducing instantaneous stress peaks and energy transmission, and reducing damage to equipment or structures. Since the buffer pad is corrugated, the upper crest area can be fixed to the central disk, and the lower trough area can be fixed to the supporting base.

[0034] In this embodiment, the buffer pad is made of metal rubber, and all metal rubber components in this device are made from metal wire mesh. The internal unit structure of the metal wire mesh is shown in the attached figure. Figure 6 As shown, the device is formed by multiple interwoven metal wires, which contain complex contact points and friction interfaces. This allows the metal-rubber parts to effectively absorb and dissipate vibration energy when subjected to force, exhibiting excellent vibration reduction and energy dissipation capabilities. The remaining non-vibration-damping components are made of stainless steel, enabling them to operate stably for a long time in harsh environments such as high temperature, high vacuum, and strong radiation. Furthermore, stainless steel has high strength and fatigue resistance, and can withstand long-term cyclic loads, effectively mitigating the degradation of vibration isolation performance caused by material aging, thereby improving the reliability and service life of the equipment.

[0035] A method for using a full-metal vibration isolation and buffering device for spaceborne equipment protection: before use, according to the structural size requirements and the vibration damping performance requirements of the load direction in the use process of the product, the metal rubber damping parts with different damping parameters are selected, the geometric parameters of the corrugation and cavity of the buffer pad are reasonably designed, the dynamic response characteristics of the vibration isolation system are optimized, the specific damping characteristics are realized by adjusting the relative density, braiding method, porosity and pre-tightening force of the metal rubber, the carrying capacity and vibration isolation performance of the system are adjusted, and excellent vibration damping effect and environmental adaptability of the overall structure are ensured. When in use, the end of the protected element is arranged on the center disc, when subjected to vibration or impact load, the vibration energy in the horizontal direction is uniformly dispersed from the center disc to the tapered metal rubber damping part, which can absorb and relieve the vibration energy transmitted to the structure; the vibration energy in the vertical direction causes the up and down vibration of the device, at this time the tapered metal rubber damping part rolls to reduce the friction and wear of the device; the buffer pad at the bottom deforms through the corrugated surface, weakens the vibration transmission, the annular cavity absorbs and disperses the impact or vibration energy by compression, reduces the instantaneous stress peak value and energy transmission, and reduces the damage of the equipment or structure.

[0036] The application has excellent high and low temperature resistance, fatigue resistance and omnidirectional vibration isolation and buffering performance, and can provide efficient and stable vibration isolation and buffering effect in extreme environments. The full-metal and multidirectional vibration isolation and buffering structure can replace the traditional rubber vibration isolator, and is applied to fields such as spaceborne, aerospace, precision instruments, ship equipment and high-speed transportation, so as to reduce the influence of vibration on key equipment, improve the stability and service life of the system, and meet the application requirements of high reliability and long service life.

[0037] Any technical solution disclosed in the application disclosed above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable numerical values with more obvious technical effects or representative values. Since there are too many values, it is impossible to enumerate them, therefore, the application discloses part of the values to illustrate the technical solutions of the application, and the above-mentioned values should not constitute a limitation on the protection scope of the application.

[0038] If the terms "first", "second" and the like are used to limit the components in the text, those skilled in the art should know that the use of "first", "second" is only for the convenience of describing the components and distinguishing them from each other, and the above terms have no special meaning unless otherwise stated.

[0039] If the present application discloses or relates to mutually fixedly connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachably fixedly connected (for example, connected using bolts or screws), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using casting process) (except for obvious cases that cannot use integral forming process).

[0040] In addition, the orientation or position relationship indicated by the terms used in any of the technical solutions disclosed in the present application, such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present patent, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present patent, and the terms used in any of the technical solutions disclosed in the present application for indicating shape include shapes similar, similar or close to the shape unless otherwise stated.

[0041] Any component provided by the present application can be assembled from multiple individual constituent parts, or can be a single component manufactured by integral forming process.

[0042] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solutions of the present application, they should be included in the technical solution range of the present application claimed.

Claims

1. An all-metal vibration isolation and buffer device for the protection of spaceborne equipment, characterized in that: The system includes a support base, a central disk is provided at the center of the support base, a buffer pad is sandwiched between the central disk and the support base, and several vibration isolation structures are evenly distributed on the outer circumference of the central disk, with the vibration isolation structures being telescopically connected to the central disk. The bearing base is provided with a circular groove, the central disk is located in the middle of the bottom of the circular groove, the outer periphery of the vibration isolation structure abuts against the wall of the circular groove, and the buffer pad is sandwiched between the central disk and the bottom of the circular groove. The vibration isolation structure includes a vertically arranged connecting plate with a central connecting shaft passing through it. Both ends of the central connecting shaft extend out of the plate on the same side. A frustum-shaped metal rubber damping element is installed on both ends of the central connecting shaft. The frustum-shaped metal rubber damping element abuts against the wall of the circular groove and can roll up and down along the wall of the circular groove.

2. The all-metal vibration isolation and buffer device according to claim 1, characterized in that; The large circular end of the frustum-shaped metal rubber damper is attached to the connecting plate, and a large circular end cap is installed on the middle part of the large circular end of the frustum-shaped metal rubber damper. A small circular end cap is installed on the middle part of the small circular end of the frustum-shaped metal rubber damper.

3. The all-metal vibration isolation and buffer device according to claim 2, characterized in that; The end of the central connecting shaft passes through the large round end cap and the frustum-shaped metal rubber damping element on the same side and is screwed onto the small round end cap.

4. The all-metal vibration isolation and buffer device according to claim 2, characterized in that; The connecting plate extends outward from the edge of the central disk into the area clamped by the large round ends of two frustoconical metal rubber damping elements. A fixing plate is connected to the extended edge. The connecting plate, except for the edge facing the central disk, is located within the area clamped by the large round ends of the two frustoconical metal rubber damping elements. A telescopic structure connects the fixing plate to the central disk.

5. The all-metal vibration isolation and buffer device according to claim 4, characterized in that; The telescopic structure includes a telescopic sleeve, one end of which is closed and the other end has a screw hole. A screw rod is screwed onto the screw hole end of the telescopic sleeve, and the other end of the screw rod is rotatably connected to a fixed plate. A connecting rod is installed on the closed end of the telescopic sleeve and is fixed to the outer periphery of the central plate.

6. The all-metal vibration isolation and buffer device according to claim 5, characterized in that; The upper surface of the buffer pad has several upper annular cavities with progressively increasing diameters arranged from the center outwards, and the lower surface of the buffer pad has several lower annular cavities with progressively increasing diameters arranged from the center outwards. The upper and lower annular cavities are arranged alternately, and the upper and lower annular cavities divide the buffer pad into a corrugated disc.

7. The all-metal vibration isolation and buffer device according to claim 6, characterized in that; The cushioning pad is made of metal rubber.

8. A method of using an all-metal vibration isolation and buffer device for the protection of spaceborne equipment, comprising the all-metal vibration isolation and buffer device as described in claim 6, characterized in that: In use, the end of the protected element is placed on the central disk. When subjected to vibration or impact loads, the horizontal vibration energy is evenly distributed from the central disk through the telescopic structure to the frustum-shaped metal-rubber damper, which can absorb and mitigate the vibration energy transmitted to the structure. The vertical vibration energy causes the device to vibrate up and down. At this time, the frustum-shaped metal-rubber damper rolls, reducing the friction and wear of the device. The bottom buffer pad deforms through the corrugated surface, weakening the vibration transmission. The annular cavity absorbs and disperses the impact or vibration energy through compression, reducing the instantaneous stress peak and energy transmission, and reducing damage to the equipment or structure.

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