Three-dimensional vibration isolation device for spaceflight load
By designing a three-dimensional vibration isolation device, combining V-direction damping material and H-direction vibration isolation unit, the problems of low damping characteristics, narrow frequency band and one-dimensional vibration isolation in the existing technology are solved, realizing multi-dimensional vibration isolation and efficient load protection, and possessing modularity and convenience.
Patent Information
- Application Number
- CN202422846155.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing aerospace payload vibration isolation devices suffer from low damping characteristics, narrow isolation bandwidth, and only one-dimensional vibration isolation performance, making them unable to effectively protect payloads from three-dimensional vibrations during launch vehicle flight.
A three-dimensional vibration isolation device is adopted, which combines V-direction damping material and H-direction vibration isolation unit body to achieve horizontal and vertical vibration isolation functions. By utilizing damping devices and spring sheet structures of different modules, multi-dimensional vibration isolation and high damping characteristics are provided. Combined with the principle of hierarchical energy dissipation, the energy dissipation characteristics of the vibration isolation system are enhanced.
It achieves three-dimensional vibration isolation, improves damping characteristics and vibration isolation frequency band, effectively reduces system displacement during transient impacts, protects the load, and the modular design of the device facilitates assembly and maintenance.
Smart Images
Figure CN223908698U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the vibration isolation technical field of spaceflight load especially relates to a three -dimensional vibration isolation device of spaceflight load. BACKGROUND
[0002] The vibration of the carrier rocket in the flight process has the following characteristics: wide frequency range, various excitation sources, resonance phenomenon, transient and steady vibration, transmission and amplification effect. Therefore, the vibration damper for the carrier rocket needs to have the following characteristics: high damping capacity, wide frequency band response, lightweight, high durability, and good dynamic performance.
[0003] The defects of the existing spaceflight load vibration isolation device mainly include the following aspects: 1. Low damping characteristic. The traditional elastic element has low damping characteristic, cannot dissipate the kinetic energy of the system during continuous vibration, and cannot effectively reduce the large displacement of the system during transient impact, resulting in increased damage probability of the carried object. 2. Narrow vibration isolation frequency band. Due to the flight characteristics of the carrier rocket, the natural frequency of most vibration isolation devices is high, the system vibration isolation efficiency is low, and a large amount of energy is transmitted, which cannot achieve the purpose of effectively protecting the load. 3. Only one-dimensional vibration isolation performance, which cannot cope with vibration impact in other two dimensions. UTILITY MODEL CONTENT
[0004] The utility model discloses a three -dimensional vibration isolation device of spaceflight load, which solves the vibration protection problem of spaceflight load in the rocket flight process.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A three -dimensional vibration isolation device of spaceflight load, including vibration isolation device mounting seat, still including vibration isolation device body, V direction damping material and H direction vibration isolation unit body, V direction damping material is arranged in the gap inside vibration isolation device body, V direction damping material and vibration isolation device body are formed integrally through the hot-pressing forming process, H direction vibration isolation unit body is provided with two, two H direction vibration isolation unit bodies are arranged in the cylinder inside vibration isolation device body, and the cylinder inside vibration isolation device body and H direction vibration isolation unit body are integrally bonded. Thus, different modules are used to realize the functions of horizontal vibration isolation and vertical vibration isolation.
[0007] As a further improvement of the utility model, the vibration isolation device body is an integrally formed metal part, six spring sheets are fixedly connected between the middle square part and the outer frame in the vibration isolation device body, and the middle square part will produce corresponding displacement when subjected to the force perpendicular to the spring sheet. Thus, different horizontal stiffness requirements are provided for the system, thereby solving the narrow vibration isolation frequency band of the traditional vibration isolator.
[0008] As a further improvement of the utility model, the number of spring sheets in the vibration isolation device body is not limited to six, and the number of spring sheets is determined according to the mass of the load and the vibration isolation requirement of the system, and the thickness and length of the spring sheet are determined according to the mass of the load and the vibration isolation requirement of the system. Thus, different vertical bearing requirements can be realized, and different bearing capacities can also be provided.
[0009] As a further improvement of the utility model, the H-direction vibration isolation unit body comprises a disc spring, an H-direction vibration isolation unit shell, an H-direction vibration isolation unit cover, an H-direction vibration isolation unit base and an H-direction damping unit, the disc spring will deform when subjected to stress, and the H-direction damping unit is slidingly connected inside the H-direction vibration isolation unit shell. Thus, the shortcomings of low damping characteristics and single damping characteristics of the traditional vibration isolator are solved.
[0010] As a further improvement of the utility model, the H-direction damping unit and the H-direction vibration isolation unit shell form a clearance type damper. The two cavities between the H-direction damping unit and the H-direction vibration isolation unit shell are provided with damping liquid, and different damping characteristics are provided for the device by the damping liquid with different viscosities.
[0011] As a further improvement of the utility model, the H-direction damping unit comprises a damper right sealing ring, a damper right elastomer, a damper piston, a damper middle sealing ring, a damper left elastomer and a damper left sealing ring, the damper right elastomer is arranged between the damper right sealing ring and the damper piston, and the damper right elastomer, the damper right sealing ring and the damper piston are combined into a damper unit piston rod by hot pressing forming process. Thus, the damper right elastomer and the damper left elastomer provide deformation compensation for the H-direction vibration isolation unit body by their own deformation.
[0012] As a further improvement of the utility model, the damper left elastomer is arranged between the damper left sealing ring and the damper middle sealing ring, the damper left elastomer, the damper left sealing ring and the damper middle sealing ring are combined into a damper unit inner seal by hot pressing forming process, and the damper unit inner seal is packed into the damper unit piston rod and bonded into an integral whole.
[0013] As a further improvement of the utility model, the vibration isolation device mounting seat surface is provided with vibration isolation device bodies in parallel, the vibration isolation device mounting seat surface is provided with fastening bolts, the vibration isolation device bodies are fixed on the vibration isolation device mounting seat through the fastening bolts, and the vibration isolation device bodies are provided with loads. Thus, multiple groups of vibration isolation devices can be used in parallel to provide greater bearing capacity. Compared with the prior art, the utility model has the beneficial effects that:
[0014] 1. By decoupling vibration isolation and hierarchical energy consumption principle, three-dimensional vibration isolation problem is decoupled and flattened by realizing horizontal and vertical vibration isolation functions with different modules.
[0015] 2. Different vertical load requirements can be achieved by changing the number or structure size of spring sheets in the vibration isolation device body. Different load capacities can also be provided by changing the assembly quantity of the vibration isolation device. The horizontal and vertical three-dimensional vibration isolation functions are realized by structural decoupling, solving the defect of traditional shock absorber only having vertical vibration isolation function. Moreover, the vertical and horizontal modules have independent damping devices, and the V-direction damping material is high-molecular material with high damping characteristics, which can provide different vertical damping by selecting different materials. The H-direction damping unit is a porous oil damping device, which can meet different horizontal damping requirements by changing the diameter of the piston hole and filling different viscosity damping liquid. The shortcomings of low damping characteristics and single damping characteristics of traditional vibration isolators are solved. The disadvantage of unable to effectively reduce system displacement under transient impact is solved.
[0016] 3. Different vertical stiffness requirements can be provided for the device by changing the size of the spring sheet in the vibration isolation device body, and different horizontal stiffness requirements can be provided for the system by selecting different disc springs. The narrow vibration isolation frequency band of traditional vibration isolators is solved. Moreover, each vibration isolation device is a completely independent module, which can be used in combination according to the load characteristics and vibration isolation requirements, and is convenient to disassemble and assemble. The disadvantage that most existing vibration isolation devices are customized and difficult to use is solved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a typical use schematic diagram of the utility model.
[0018] Figure 2 It is a typical use schematic diagram of the utility model.
[0019] Figure 3 It is a structure schematic diagram of the vibration isolation device of the utility model.
[0020] Figure 4 It is a structure schematic diagram of the vibration isolation device body of the utility model.
[0021] Figure 5 It is a structure schematic diagram of the H-direction damping unit of the utility model.
[0022] Figure 6 It is a cross-sectional schematic diagram of the vibration isolation device of the utility model.
[0023] Figure 7 It is the sectional view of H direction damping unit of the utility model.
[0024] In the figure: 1, vibration isolation device mounting seat; 4, load; 5, fastening bolt; 6, vibration isolation device body; 7, V direction damping material; 8, H direction vibration isolation unit body; 9, disc spring; 10, H direction vibration isolation unit shell; 11, H direction vibration isolation unit cover; 12, H direction vibration isolation unit base; 13, damper piston; 14, damper right elastomer; 15, damper left elastomer; 16, damper right seal ring; 17, damper middle seal ring; 18, damper left seal ring; 19, spring piece; 20, H direction damping unit. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings. In the following description, a lot of specific details are set forth in order to give a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.
[0026] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.
[0027] As shown in the figure, a three-dimensional vibration isolation device of a space load includes a vibration isolation device mounting seat 1, a vibration isolation device body 6, a V direction damping material 7, an H direction vibration isolation unit body 8, a disc spring 9, an H direction vibration isolation unit shell 10, an H direction vibration isolation unit cover 11, an H direction vibration isolation unit base 12 and an H direction damping unit 20.
[0028] As Figure 1 shown, the vibration isolation device bodies 6 are arranged side by side, and the vibration isolation device bodies 6 are fixed to the vibration isolation device mounting seat 1 using fastening bolts 5, and the load 4 is arranged between the vibration isolation device bodies 6. The number of vibration isolation devices is not limited to two, and can be determined according to the weight of the load 4 and the vibration isolation requirement. By increasing or reducing the number of vibration isolation devices as needed, this design can flexibly adapt to loads 4 of different weights, thereby being easy to expand, so that the system can be adjusted accordingly as the load 4 increases or the vibration isolation requirement improves.
[0029] As Figure 2As shown, the vibration isolation device bodies 6 are arranged opposite to each other, fixed to the vibration isolation device mounting base 1 by fastening bolts 5, and the load 4 is arranged between the vibration isolation device bodies 6. The number of vibration isolation devices is not limited to one set, and multiple sets of vibration isolation devices can be used in parallel to provide greater load bearing capacity. Using multiple sets of vibration isolation devices in parallel can significantly improve the load bearing capacity of the entire system. Each set of vibration isolation devices can share a portion of the load 4, thereby avoiding damage to a single vibration isolation device due to excessive pressure.
[0030] As shown in Figure 3 and Figure 4 , the vibration isolation device body 6 is a one-piece metal part, with the middle square portion and the outer frame connected by six spring plates 19, as shown in Figure 4 . The V-shaped damping material 7 is filled into the gaps of the vibration isolation device body 6. Two H-shaped vibration isolation unit bodies 8 are placed inside the cylinders of the vibration isolation device body 6. The spring plates 19 serve as connecting pieces, giving the vibration isolation device body 6 greater flexibility. This design allows the device to better adapt to various vibration environments and reduce structural stress caused by vibrations.
[0031] As shown in Figure 5 , the damper right seal ring 16 is placed to the right of the damper piston 13, the damper right elastomer 14 is placed between the damper right seal ring 16 and the damper piston 13, and the damper right elastomer 14 is a high-molecular elastomer. The three parts are formed into a damper unit piston rod using a hot pressing process. The damper left seal ring 18 is placed to the left of the damper middle seal ring 17, and the damper left elastomer 15 is placed between the damper left seal ring 18 and the damper middle seal ring 17. The damper left elastomer 15 is a high-molecular elastomer, and the three parts are formed into a damper unit inner seal using a hot pressing process. The damper unit inner seal is inserted into the damper unit piston rod to form an H-shaped damper unit 20. The damper right seal ring 16 and the damper left seal ring 18 are placed on both sides of the damper piston 13, respectively, and together with the damper middle seal ring 17 form a stable structural frame. This design allows the damper unit to maintain structural stability and integrity when subjected to external forces or vibrations. It also effectively prevents the leakage of damping medium, ensuring the sealing of the damper unit. By inserting the damper unit inner seal into the damper unit piston rod, a complete H-shaped damper unit 20 is formed. This structure allows the damper unit to more effectively convert vibration energy into heat energy or other forms of energy when subjected to vibrations, thereby improving the damping efficiency.
[0032] As shown in Figure 6As shown, the H-direction vibration isolation unit body 8 comprises a disc spring 9, an H-direction vibration isolation unit shell 10, an H-direction vibration isolation unit cover 11, an H-direction vibration isolation unit base 12, and an H-direction damping unit 20. The H-direction damping unit 20 is installed inside the H-direction vibration isolation unit shell 10. The H-direction vibration isolation unit cover 11 is arranged on the H-direction damping unit 20 and the H-direction vibration isolation unit shell 10. The H-direction vibration isolation unit base 12 is arranged on the left side of the H-direction vibration isolation unit cover 11. The disc spring 9 is arranged between the H-direction vibration isolation unit base 12 and the H-direction vibration isolation unit cover 11. The H-direction vibration isolation unit body 8 adopts a modular design. Each component such as the disc spring 9 and the H-direction damping unit 20 can be independently manufactured and replaced, which is convenient for maintenance and upgrading. Moreover, the disc spring 9 has a unique shape and elastic properties, and can be deformed when subjected to external force or vibration, thereby absorbing and dissipating energy. This design optimizes the vibration isolation effect of the H-direction vibration isolation unit, and makes it more effective to isolate and reduce vibration.
[0033] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A three-dimensional vibration isolation device for a space payload, comprising a vibration isolation device mounting base (1), characterized in that, Also include the vibration isolation device body (6), V direction damping material (7) and H direction vibration isolation unit body (8), the V direction damping material (7) is arranged inside the slit of vibration isolation device body (6), the V direction damping material (7) and vibration isolation device body (6) are formed integrally by hot pressing forming process, the H direction vibration isolation unit body (8) is provided with two, two the H direction vibration isolation unit body (8) is arranged inside the cylinder of vibration isolation device body (6), the H direction vibration isolation unit body (8) and the cylinder inside vibration isolation device body (6) are bonded integrally.
2. A three-dimensional vibration isolation device for a space-borne payload according to claim 1, characterized in that The surface of the vibration isolation device mounting seat (1) is provided with vibration isolation device body (6) side by side, the surface of the vibration isolation device mounting seat (1) is provided with fastening bolt (5), the vibration isolation device body (6) is fixed on the vibration isolation device mounting seat (1) by fastening bolt (5), the vibration isolation device body (6) is provided with load (4) between.
3. The three-dimensional isolation device for a space payload according to claim 1, wherein The vibration isolation device body (6) is an integral molding metal part, six spring leaves (19) are fixedly connected between the middle square part and the outer frame of the vibration isolation device body (6), the middle square part will produce corresponding displacement when subjected to force perpendicular to the spring leaf (19).
4. The three-dimensional isolation device for a space payload according to claim 3, wherein The number of spring leaves (19) in the vibration isolation device body (6) is not limited to six, the number of spring leaves (19) is determined according to the mass of load (4) and the vibration isolation requirement of the system, the thickness and length of spring leaf (19) are determined according to the mass of load (4) and the vibration isolation requirement of the system.
5. The three-dimensional isolation device for a space payload according to claim 1, wherein The H direction vibration isolation unit body (8) includes disc spring (9), H direction vibration isolation unit shell (10), H direction vibration isolation unit cover (11), H direction vibration isolation unit base (12) and H direction damping unit (20), the disc spring (9) will deform when subjected to force, the H direction damping unit (20) is slidingly connected inside the H direction vibration isolation unit shell (10).
6. A three-dimensional isolation device for a space-borne payload according to claim 5, characterized in that The H direction damping unit (20) and the H direction vibration isolation unit shell (10) form a clearance damper, and damping liquid is arranged in the two cavities between the H direction damping unit (20) and the H direction vibration isolation unit shell (10) to provide different damping characteristics for the device by using damping liquid with different viscosities.
7. The three-dimensional isolation device for a space payload according to claim 5, wherein The H direction damping unit (20) includes damper right sealing ring (16), damper right elastomer (14), damper piston (13), damper middle sealing ring (17), damper left elastomer (15) and damper left sealing ring (18), the damper right elastomer (14) is arranged between the damper right sealing ring (16) and the damper piston (13), and the damper right elastomer (14), the damper right sealing ring (16) and the damper piston (13) are combined into a damping unit piston rod by hot pressing forming process.
8. A three-dimensional vibration isolation device for a space-borne payload according to claim 7, characterized in that The left elastic body (15) of the damper is arranged between the left sealing ring (18) and the middle sealing ring (17) of the damper, the left elastic body (15), the left sealing ring (18) and the middle sealing ring (17) of the damper are combined into the inner sealing of the damping unit by the hot-pressing forming process, and the inner sealing of the damping unit is arranged in the piston rod of the damping unit and is bonded to be integrated.