All-metal vibration isolation buffer device for satellite-borne equipment protection and working method

Abstract

The all-metal vibration isolation buffering device comprises a bearing base, a center disc is arranged in the center of the bearing base, a buffering pad is arranged between the center disc and the bearing base in a clamped mode, and a plurality of vibration isolation structures are evenly distributed on the periphery of the center disc in a circumferential mode; and the vibration isolation structure is telescopically connected with the central disc. Due to the excellent high and low temperature resistance, fatigue resistance and omni-directional vibration isolation and buffering performance, an efficient and stable vibration isolation and buffering effect can be provided in an extreme environment. The all-metal multidirectional vibration isolation buffer structure can replace a traditional rubber vibration isolator, is applied to the fields of spaceborne, aerospace, precise instruments, ship equipment, high-speed traffic and the like, and is used for reducing the influence of vibration on key equipment, improving the stability of a system, prolonging the service life of the system and meeting the application requirements of high reliability and long service life.

Description

Technical Field

[0001] The invention relates to an all-metal vibration isolation buffer device for protecting satellite-borne equipment and a working method. Background Art

[0002] With the advancement of aerospace technology, satellite-borne equipment will face more severe environments and vibration impact loads, which may easily cause equipment damage, so vibration isolation devices are needed to protect the stability of the equipment. Existing traditional vibration isolation devices use rubber or other polymers. They have poor high temperature resistance and aging resistance, and are prone to performance degradation in extreme environments. Faced with nonlinear vibration and impact loads from multiple directions and in complex environments, their damping characteristics and mechanical properties are difficult to meet the needs of high-performance satellite-borne equipment, which may lead to a decrease in vibration isolation and buffering effects, thereby affecting the normal operation of satellite-borne equipment. The main problems and defects of existing traditional satellite-borne vibration isolation devices are: (1) Satellite-borne equipment will experience extreme temperature changes, vacuum environments and radiation in space. The rubber materials in traditional vibration isolation devices are prone to hardening and losing elasticity at extremely low temperatures, and may soften or age at high temperatures, resulting in a decrease in vibration isolation performance. In addition, rubber materials are prone to creep or fatigue fracture under long-term vibration, resulting in a gradual decrease in vibration isolation and buffering performance, which cannot meet the long-term operation requirements of satellite-borne equipment. (2) Traditional satellite-borne vibration isolation devices are insufficient in terms of multi-directional vibration isolation capabilities. They are usually only optimized for vibration shocks in specific directions, and it is difficult to effectively suppress vibration shock interference from multiple degrees of freedom in complex space environments. This limitation may affect the stability and reliability of satellite-borne equipment. (3) Some satellite-borne vibration isolation devices use metal rubber as a vibration isolation element. During the installation process, the metal rubber is connected to the equipment by pressing, clamping or bolting, which generates friction during the installation process. At the same time, under the action of vibration loads, the metal rubber and the contact surface are prone to slip. The combined effect of this friction and slip may cause wear of the contact surface and the metal wire structure, thereby weakening the vibration isolation performance and affecting the long-term reliability of the component. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an all-metal vibration isolation and buffering device and a working method for protecting satellite-borne equipment, so as to solve the problems raised by the above-mentioned background technology.

[0004] The present invention is implemented by the following scheme: an all-metal vibration isolation and buffer device for protecting satellite-borne equipment: including a bearing base, a center disk is arranged on the center of the bearing base, a buffer pad is sandwiched between the center disk and the bearing base, and a plurality of vibration isolation structures are evenly distributed on the circumference of the center disk, and the vibration isolation structure is telescopically connected to the center disk.

[0005] Furthermore, a circular groove is provided on the bearing base, the center disk is provided on 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 clamped between the center disk and the bottom of the circular groove.

[0006] Furthermore, the vibration isolation structure includes a vertically arranged connecting plate, a central connecting shaft is passed through the connecting plate, both ends of the central connecting shaft extend out of the plate body on the same side of the connecting plate, and both ends of the central connecting shaft are installed with frustum-shaped metal rubber damping parts.

[0007] Furthermore, the large round end of the frustum-shaped metal rubber damping member is abutted against the connecting plate, a large round end end cover is installed on the middle of the large round end of the frustum-shaped metal rubber damping member, and a small round end end cover is installed on the middle of the small round end of the frustum-shaped metal rubber damping member.

[0008] Furthermore, the end of the central connecting shaft passes through the large circular end cover and the frustum-shaped metal rubber damping member on the same side and is screwed to the small circular end cover.

[0009] Furthermore, the edge of the connecting plate on one side of the center disk extends out from the area clamped by the large round ends of the two frustum-shaped metal rubber damping parts, and a fixing plate is connected to the extended edge. The edges of the connecting plate on the side not facing the center disk are all located in the area clamped by the large round ends of the two frustum-shaped metal rubber damping parts, and a telescopic structure is connected between the fixing plate and the center disk.

[0010] Furthermore, the telescopic structure includes a telescopic sleeve, one end of which is closed and the other end is provided with a screw hole, a screw is threaded on the screw hole end of the telescopic sleeve, the other end of the screw is rotatably connected to a fixed plate, a connecting rod is installed on the closed end of the telescopic sleeve, and the connecting rod is fixed to the outer periphery of the center disk.

[0011] Furthermore, a plurality of upper annular cavities with diameters increasing successively are arranged on the upper surface of the buffer pad from the middle to the outside, and a plurality of lower annular cavities with diameters increasing successively are arranged on the lower surface of the buffer pad from the middle to the outside, and the upper annular cavities and the lower annular cavities are arranged alternately, and the upper annular cavities and the lower annular cavities separate the buffer pad into a corrugated disk.

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

[0013] A method for using an all-metal vibration isolation buffer device for protecting satellite-borne equipment: when in use, the end of the protected element is set on the center side, and when subjected to vibration or impact load, the vibration energy in the horizontal direction is evenly dispersed from the center disk through the telescopic structure to the frustum-shaped metal rubber damping part, which can absorb and alleviate the vibration energy transmitted to the structure; the vibration energy in the vertical direction causes the device to vibrate up and down, and the frustum-shaped metal rubber damping part rolls at this time, reducing the friction and wear of the device; the buffer pad at the bottom is deformed through the corrugated surface to weaken the vibration transmission, and the annular cavity absorbs and disperses the impact or vibration energy through compression, reducing the instantaneous stress peak and energy transmission, and reducing the damage to the equipment or structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects: by evenly arranging the vibration isolation structure and the telescopic structure along the circumference, effective vibration isolation in the horizontal direction is achieved, and the buffer pad provides excellent vibration isolation and buffering effects in the vertical direction. The combination of the two realizes a full range of vibration isolation functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the vibration isolation structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the telescopic structure of an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a buffer pad according to an embodiment of the present invention; Figure 5 for Figure 4 AA cross-sectional structure diagram; Figure 6 It is a schematic diagram of the internal unit structure of the metal wire mesh according to an embodiment of the present invention.

[0016] In the figure: 1-bearing base; 2-center plate; 3-buffer pad; 4-vibration isolation structure; 5-circular groove; 6-connecting plate; 7-center connecting shaft; 8-cone-shaped metal rubber damping member; 9-large circular end cover; 10-small circular end cover; 11-fixing plate; 12-telescopic structure; 13-telescopic sleeve; 14-screw hole; 15-screw rod; 16-connecting rod; 17-tightening bolt; 18-upper annular cavity; 19-lower annular cavity. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] like Figure 1-6 As shown, an all-metal vibration isolation and buffering device for protecting satellite-borne equipment includes a bearing base 1, a center disk 2 is arranged at the center of the bearing base, a buffer pad 3 is sandwiched between the center disk and the bearing base, and a plurality of vibration isolation structures 4 are evenly distributed on the circumference of the outer periphery of the center disk. The vibration isolation structure and the center disk are telescopically connected. When in use, the end of the protected element is set on the center disk. When subjected to vibration or impact loads, the vibration energy along the horizontal direction is evenly dispersed from the center 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, thereby reducing the instantaneous stress peak and energy transfer, and reducing the damage to the equipment or structure.

[0021] In this embodiment, the specific structure of the bearing base is as follows: a circular groove 5 is provided on the bearing base, the center disk is provided 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 clamped between the center disk and the bottom of the circular groove, that is, the center disk is attached to the buffer pad or fixed to the buffer pad by bolts.

[0022] In this embodiment, in order to achieve vibration isolation of the vibration isolation structure, the vibration isolation structure includes a vertically arranged connecting plate 6, on which a central connecting shaft 7 is passed, and both ends of the central connecting shaft extend out of the plate body on the same side of the connecting plate, and both ends of the central connecting shaft are installed with a frustum-shaped metal rubber damping member 8, which 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 member can be that the frustum-shaped metal rubber damping member is rotatably connected to the shaft body of the central connecting shaft extending out of the connecting plate, so that when subjected to vibration or impact load, the vibration energy along the vertical direction causes the device to vibrate up and down, and at this time, the frustum-shaped metal rubber damping member rolls, thereby effectively reducing surface friction and wear, and improving service life.

[0023] In this embodiment, in order to realize the installation of the frustum-shaped metal rubber damping member, the large circular end of the frustum-shaped metal rubber damping member is abutted against the connecting plate, a large circular end end cover 9 is installed on the middle of the large circular end of the frustum-shaped metal rubber damping member, and the large circular end end cover is rotatably connected to the connecting plate, and a small circular end end cover 10 is installed on the middle of the small circular end of the frustum-shaped metal rubber damping member, that is, end cover installation grooves are provided on the middle of the large circular end and the middle of the small circular end of the frustum-shaped metal rubber damping member, and the large circular end end cover and the small circular end end cover are both provided on the corresponding installation grooves, and the frustum-shaped metal rubber damping member is limited in the axial direction of the central connecting axis by the large circular end end cover and the small circular end end cover, so as to facilitate the installation of the frustum-shaped metal rubber damping member.

[0024] In this embodiment, the frustum-shaped metal rubber damping member is a rotating body structure with an arc-shaped outer wall, so that it can fit tightly against the rigid bearing base. When the device is installed and moves up and down due to vibration, the structure can produce a certain degree of rolling, thereby effectively reducing surface friction and wear and increasing service life.

[0025] In this embodiment, for the sake of reasonable design, the end of the central connecting shaft passes through the large circular end cover and the frustum-shaped metal rubber damping member on the same side and is screwed to the small circular end cover, that is, the large circular end cover and the frustum-shaped metal rubber damping member are rotatably connected to the central connecting shaft, and the small circular end cover can rotate in the small circular end mounting groove; at the same time, the small circular end cover is fixed to the central connecting shaft to prevent the frustum-shaped metal rubber damping member from falling out.

[0026] In this embodiment, in order to avoid interference, the edge of the connecting plate body on one side facing the center disk extends out of the area clamped by the large circular ends of the two frustum-shaped metal rubber damping members, and a fixing plate 11 is connected to the extended edge. The edges of the connecting plate on the side not facing the center disk are all located in the area clamped by the large circular ends of the two frustum-shaped metal rubber damping members, that is, except for the edge of the connecting plate body on the side facing the center disk, the other edges do not exceed the area clamped by the large circular ends of the two frustum-shaped metal rubber damping members, so as to avoid collision between the connecting plate and the inner wall of the circular groove. A telescopic structure 12 is connected between the fixing plate and the center disk, that is, when in use, when subjected to vibration or impact load, the vibration energy along the horizontal direction is evenly dispersed from the center disk through the telescopic structure to the frustum-shaped metal rubber damping member, so as to absorb and alleviate the vibration energy transmitted to the structure.

[0027] In this embodiment, the specific structure of the telescopic structure is as follows: the telescopic structure includes a telescopic sleeve 13, one end of the telescopic sleeve is closed, and a screw hole 14 is opened in the other end, a screw rod 15 is screwed on the screw hole end of the telescopic sleeve, and the other end of the screw rod is rotatably connected to the 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 center disk, and a fastening screw hole connected to the screw hole is opened on the outer wall of the telescopic sleeve, and a fastening bolt 17 for further fixing the screw rod is screwed in the fastening screw hole. The telescopic structure can adjust the length control device for pre-tightening, so that the external load can be more evenly distributed to each vibration isolation element through the adjustable pre-tightening leg, thereby reducing local overload and improving the stability and service life of the overall structure.

[0028] In this embodiment, the upper pad surface of the buffer pad is provided with a plurality of upper annular cavities 18 with increasing diameters from the middle to the outside, and the lower pad surface of the buffer pad is provided with a plurality of lower annular cavities 19 with increasing diameters from the middle to the outside. The upper annular cavities and the lower annular cavities are arranged alternately, and the upper annular cavities and the lower annular cavities separate the buffer pad into a corrugated disk. The annular structure makes the stress distribution more uniform. The design of the corrugated structure enables it to withstand large elastic deformation. The internal cavity reduces the local stiffness. When subjected to vibration or impact, the cavity deforms and weakens the vibration transmission. At the same time, the cavity absorbs and disperses the impact or vibration energy through compression, reduces the instantaneous stress peak and energy transmission, and reduces the damage to the equipment or structure. Since the buffer pad is corrugated, the upper wave peak area can be fixedly connected to the central disk, and the lower wave valley area can be fixedly connected to the bearing base.

[0029] In this embodiment, the buffer pad is made of metal rubber, and the metal rubber parts in this device are all made of metal wire mesh as raw material. The internal unit structure of the metal wire mesh is shown in the attached figure. Figure 6 As shown, it is formed by multiple metal wires interwoven with each other, which contains complex contact points and friction interfaces, so that the metal rubber parts can effectively absorb and dissipate vibration energy when subjected to force, and have excellent vibration reduction and energy dissipation capabilities. The remaining non-vibration reduction parts are made of stainless steel, which enables them to operate stably for a long time in harsh environments such as high temperature, high vacuum and strong radiation. Stainless steel has high strength and fatigue resistance, can withstand long-term cyclic loads, and effectively alleviate the degradation of vibration isolation performance caused by material aging, thereby improving the reliability and service life of the equipment.

[0030] A method for using an all-metal vibration isolation buffer device for protecting satellite-borne equipment: before use, according to the structural size requirements of the product during use and the vibration reduction performance requirements in the load direction, 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, and specific damping characteristics are achieved by adjusting the relative density, weaving method, porosity and preload of the metal rubber, and the bearing capacity and vibration isolation performance of the system are adjusted to ensure that the overall structure has excellent vibration reduction effect and environmental adaptability. When in use, the end of the protected element is set beside the center. When subjected to vibration or impact load, the vibration energy in the horizontal direction is evenly dispersed from the center disk through the telescopic structure to the frustum-shaped metal rubber damping member, which can absorb and alleviate the vibration energy transmitted to the structure; the vibration energy in the vertical direction causes the device to vibrate up and down, at which time the frustum-shaped metal rubber damping member rolls to reduce the friction and wear of the device; the buffer pad at the bottom is deformed through the corrugated surface to weaken the vibration transmission, and the annular cavity absorbs and disperses the impact or vibration energy through compression, reducing the instantaneous stress peak and energy transmission, and reducing the damage to the equipment or structure.

[0031] The present invention can provide efficient and stable vibration isolation and buffering effects in extreme environments due to its excellent high and low temperature resistance, fatigue resistance and omnidirectional vibration isolation and buffering performance. Its all-metal, multi-directional vibration isolation and buffering structure enables it to replace traditional rubber vibration isolators and is used in the fields of satellite, aerospace, precision instruments, ship equipment and high-speed transportation to reduce the impact of vibration on key equipment, improve the stability and service life of the system, and meet the application requirements of high reliability and long life.

[0032] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0033] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0034] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0035] In addition, the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" used in any of the technical solutions disclosed in the above-mentioned invention are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this patent, and do 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 this patent. Unless otherwise stated, the terms used to indicate shapes used in any of the technical solutions disclosed in the above-mentioned invention include shapes that are approximate, similar, or close to them.

[0036] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. An all-metal vibration isolation buffer device for protecting satellite-borne equipment, characterized in that: It comprises a bearing base, a center plate is arranged at the center of the bearing base, a buffer pad is sandwiched between the center plate and the bearing base, a plurality of vibration isolation structures are evenly distributed on the outer circumference of the center plate, and the vibration isolation structures are telescopically connected to the center plate.

2. The all-metal vibration isolation and buffering device according to claim 1, characterized in that; A circular groove is arranged on the bearing base, the center plate is arranged on 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 center plate and the bottom of the circular groove.

3. The all-metal vibration isolation and buffering device according to claim 2, characterized in that; The vibration isolation structure includes a vertically arranged connecting plate, a central connecting shaft is passed through the connecting plate, both ends of the central connecting shaft extend out of the plate body on the same side of the connecting plate, and both ends of the central connecting shaft are installed with frustum-shaped metal rubber damping parts.

4. The all-metal vibration isolation and buffering device according to claim 3, characterized in that; The large round end of the frustum-shaped metal rubber damping member is abutted against the connecting plate, a large round end end cover is installed on the middle of the large round end of the frustum-shaped metal rubber damping member, and a small round end end cover is installed on the middle of the small round end of the frustum-shaped metal rubber damping member.

5. The all-metal vibration isolation and buffering device according to claim 4, characterized in that; The end of the central connecting shaft passes through the large circular end cover and the frustum-shaped metal rubber damping member on the same side and is screwed on the small circular end cover.

6. The all-metal vibration isolation and buffering device according to claim 4, characterized in that; The edge of the connecting plate on one side facing the center disk extends out from the area clamped by the large round ends of the two frustum-shaped metal rubber damping parts, and a fixing plate is connected to the extended edge. The edge of the connecting plate on the side not facing the center disk is located in the area clamped by the large round ends of the two frustum-shaped metal rubber damping parts, and a telescopic structure is connected between the fixing plate and the center disk.

7. The all-metal vibration isolation and buffering device according to claim 6, characterized in that; The telescopic structure includes a telescopic sleeve, one end of which is closed and the other end is provided with a screw hole. A screw is screwed to the screw hole end of the telescopic sleeve, and the other end of the screw is rotatably connected to a fixed plate. A connecting rod is installed on the closed end of the telescopic sleeve, and the connecting rod is fixed to the outer periphery of the center disk.

8. The all-metal vibration isolation and buffering device according to claim 7, characterized in that; The upper surface of the buffer pad is provided with a plurality of upper annular cavities with diameters increasing successively from the middle to the outside, and the lower surface of the buffer pad is provided with a plurality of lower annular cavities with diameters increasing successively from the middle to the outside, the upper annular cavities and the lower annular cavities are arranged alternately, and the upper annular cavities and the lower annular cavities separate the buffer pad into a corrugated disk.

9. The all-metal vibration isolation and buffering device according to claim 8, characterized in that; The buffer pad is made of metal rubber.

10. A method for using a full metal vibration isolation buffer device for protecting satellite-borne equipment, using the full metal vibration isolation buffer device as claimed in claim 8, characterized in that: When in use, the end of the protected element is set beside the center. When subjected to vibration or impact load, the vibration energy in the horizontal direction is evenly dispersed from the center disk through the telescopic structure to the frustum-shaped metal rubber damping member, which can absorb and alleviate the vibration energy transmitted to the structure; the vibration energy in the vertical direction causes the device to vibrate up and down, at which time the frustum-shaped metal rubber damping member rolls to reduce the friction and wear of the device; the buffer pad at the bottom is deformed through the corrugated surface to weaken the vibration transmission, and the annular cavity absorbs and disperses the impact or vibration energy through compression, reducing the instantaneous stress peak and energy transmission, and reducing the damage to the equipment or structure.

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