CN117847136A - Broadband and frequency selective bellows fluid vibration damping strut for inhibiting satellite vibration - Google Patents
Broadband and frequency selective bellows fluid vibration damping strut for inhibiting satellite vibration Download PDFInfo
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- 238000013016 damping Methods 0.000 title claims abstract description 74
- 239000012530 fluid Substances 0.000 title claims abstract description 49
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 230000000712 assembly Effects 0.000 claims abstract description 22
- 238000000429 assembly Methods 0.000 claims abstract description 22
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 229920002545 silicone oil Polymers 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The invention discloses a broadband and frequency selective corrugated pipe fluid vibration reduction support for inhibiting satellite vibration, and relates to the technical field of vibration isolation and noise reduction of spacecrafts. The invention comprises a piston assembly, a main bellows assembly, a secondary bellows assembly, a main bellows connecting flange, a sealing ring, silicone oil, a machined spring assembly, an upper connecting piece assembly, a middle connecting piece and a lower connecting piece assembly, wherein the two sets of main bellows assemblies are distributed above and below the piston assembly and are connected with the piston assembly through first flanges thereof by bolts and nuts, and the sealing ring is arranged between the two sets of main bellows assemblies and the piston assembly. The technical scheme provided by the invention provides an efficient broadband frequency selective corrugated pipe fluid vibration damping support for a satellite system, a precise effective load or structure is protected in an active section, and the working quality of the precise effective load and a satellite is improved in an on-orbit section.
Description
Technical Field
The invention belongs to the field of vibration isolation and noise reduction of spacecrafts, and particularly relates to a broadband and frequency selective corrugated pipe fluid vibration reduction support for inhibiting satellite vibration.
Background
In order to avoid damage to the precision payloads or structures on the satellite in the active section and to improve the working quality of the same in the orbit section, or to avoid significant contribution of micro-vibrations thereof to the structural noise in the manned spacecraft cabin, vibration isolation of these precision payloads or structures is required. The vibration isolator is faced with a random and broadband large-amplitude environment in the active section, and is faced with a random and high-frequency energy-based micro-amplitude environment in the rail section, so that the rigidity and the damping of the vibration isolator are required to be high in performance and environment adaptability.
Bellows fluid dampers applied to micro-vibration isolation of spacecraft originate from two-parameter D-Strut dampers developed for NASA by Honeywell corporation in the early united states, and three-parameter dampers with buffer chambers have been proposed later with technological progress, such as those described in european patent documents EP0623763B1, EP2518366B1 and chinese patent document CN104632989B, CN104389943B, in which the vibration isolation performance in the high frequency band is significantly improved, but the vibration isolation performance in the low frequency band including the formant region is not improved, as compared with the two-parameter dampers.
In order to improve the defects of the passive vibration isolator in the frequency width, particularly in the low frequency band, a scheme of adopting active and passive integrated vibration isolation is proposed and studied, for example, patent document CN115897837a proposes a vibration isolator scheme of a corrugated pipe liquid damping superposition voice coil motor actuator. The active and passive integrated vibration isolator has the obvious defects of needing to be provided with a power supply, a sensor, a controller and other equipment in the space engineering, which obviously increases the complexity of the vibration isolation system and reduces the reliability.
The key technical problems to be solved in the development of the corrugated pipe fluid damper with high reliability, high efficiency in restraining the broadband of satellite vibration and environmental adaptability include:
1. the prior bellows fluid damper almost adopts a fixed damping hole mode, so that the bandwidth of the damper is limited, and the vibration isolation performance of the damper in a low-frequency band including a formant region is poor, so that better and adaptive hydraulic damping needs to be designed.
2. The existing corrugated pipe fluid damper is mainly aimed at the micro-vibration environment of the on-track section, and is less in consideration of the environment of the active section and the working conditions such as unlocking impact, low-frequency shaking of an inertial device and the like of the on-track section. Therefore, in addition to the above-described better, adaptive hydraulic damping, there is a need to design a good linearity, adaptive stiffness.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a broadband and frequency selective corrugated pipe fluid vibration damping support for inhibiting satellite vibration.
In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:
a broadband frequency selective corrugated pipe fluid vibration damping support for inhibiting satellite vibration comprises a piston assembly, a main corrugated pipe assembly, a secondary corrugated pipe assembly, a main corrugated pipe and secondary corrugated pipe connecting flange, a sealing ring, silicone oil, a machining spring assembly, an upper connecting piece assembly, a middle connecting piece and a lower connecting piece assembly, wherein the two sets of main corrugated pipe assemblies are distributed above and below the piston assembly and are connected with the piston assembly through bolts and nuts through first flanges of the main corrugated pipe assemblies, and the sealing ring is arranged between the two sets of main corrugated pipe assemblies and the piston assembly; the first flanges of the two sets of auxiliary bellows assemblies are respectively connected with the second flanges of the two sets of main bellows assemblies by bolts and nuts through the two sets of main and auxiliary bellows connecting flanges, and sealing rings are respectively arranged between each set of main bellows assemblies and the connecting flanges and between the connecting flanges and the auxiliary bellows assemblies;
and symmetrical sealed cavities are formed above and below the piston assembly, and each sealed cavity is divided into a main cavity corresponding to the main bellows assembly, a buffer cavity corresponding to the auxiliary bellows assembly and a fluid channel formed between the auxiliary bellows assembly and the main and auxiliary bellows connecting flanges and used for connecting the main cavity with the buffer cavity.
Optionally, silicone oil is filled in the sealing cavities above and below the piston assembly as a working medium.
Optionally, the upper ends and the lower ends of the two sets of intermediate connecting pieces are respectively connected with the main corrugated pipe connecting flanges and the auxiliary corrugated pipe connecting flanges which are positioned above and below the piston assembly by bolts and nuts to form bilateral symmetry arrangement, the upper connecting piece assembly is positioned above the intermediate connecting pieces, the middle parts of the upper connecting piece assembly and the piston assembly are connected by screws, and the lower parts of the upper connecting piece assembly and the clamping rings in the machined spring assembly are connected by screws.
Optionally, the lower connecting piece assembly is positioned below the middle connecting piece, and the upper part of the lower connecting piece assembly is connected with the main and auxiliary corrugated pipe connecting flanges positioned below the piston assembly through bolts and nuts; the machining spring assembly is positioned in the lower connecting piece assembly, the lower end of the machining spring assembly is connected with the lower connecting piece assembly through a screw, and the upper end clamping ring is connected with the lower part of the upper connecting piece assembly through a screw.
Optionally, the piston assembly comprises a piston, a fixed damping hole and a frequency valve, wherein the middle part of the piston is provided with the fixed damping hole as a main damping hole, and the length-diameter ratio of the main damping hole accords with the category of thick-wall small holes, namely 0.5< l/d is less than or equal to 4.
Optionally, the frequency valves comprise valve seats, valve cores and valve core springs, and the frequency valves are circumferentially and uniformly distributed or symmetrically distributed around the fixed damping holes, and the number, normally open or normally closed form and valve parameters of the frequency valves are optimized according to the requirements of a specific vibration isolation system.
Optionally, the main bellows assembly includes a main bellows, a main bellows first flange and a main bellows second flange, the first flange and the second flange are in 90-degree dislocation design in azimuth, and the main bellows is connected with the first flange and the second flange in a welding manner; the auxiliary bellows assembly comprises an auxiliary bellows, an auxiliary bellows first flange, an auxiliary bellows second flange and a volume adjusting end cover, wherein the volume adjusting end cover is positioned above the auxiliary bellows and is connected with the auxiliary bellows second flange through screws, a sealing ring is arranged between the volume adjusting end cover and the auxiliary bellows second flange, and the auxiliary bellows is connected with the first flange and the second flange through welding.
Optionally, the machined spring assembly includes a machined spring and a snap ring, the machined spring is in the form of a transverse groove spring, and in a natural state, the force-exerting portion of the snap ring is located at a middle position in a clamping groove at an upper portion of the transverse groove spring, and gaps between an upper surface and a lower surface of the snap ring and the transverse groove spring are equal, and the gap is optimized according to the condition of the vibration isolation system.
Optionally, the upper connector assembly comprises an upper connector body and a connecting screw rod with a flexible hinge, wherein the connecting screw rod with the flexible hinge is coated with a thread compound and is in threaded connection and fastening with the upper connector body;
optionally, the lower connecting piece assembly comprises a lower connecting piece body and a connecting screw rod, and the connecting screw rod is fastened with the upper connecting piece body through threaded connection after being coated with the thread compound.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects, and of course, any product for implementing the invention does not necessarily need to achieve all the following advantages at the same time:
the invention designs a broadband frequency selective corrugated pipe fluid vibration damping strut for inhibiting satellite vibration, which is arranged between a vibration-isolated load or structure and a foundation, can provide large rigidity and large damping in an environment with random low-frequency and large-amplitude energy as a main part in an active section, and can provide small rigidity and small damping in an environment with random high-frequency and small-amplitude energy as a main part in an orbit section; for large-size effective load, in order to improve reliability, a locking mode is generally adopted in the active section, under the working condition, the invention can continuously adapt to and meet the compression requirement of a locking state, and when the effective load of the track section is unlocked and released, the impact energy of the effective load can be effectively relieved, and after the effective load is put into normal work, the micro-vibration between the effective load and a foundation can be obviously restrained. Therefore, the technical scheme provided by the invention provides an efficient broadband frequency selective corrugated pipe fluid vibration reduction support for a satellite system, a precise effective load or structure is protected in an active section, and the working quality of the precise effective load and a satellite is improved in an on-orbit section.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The drawings in the following description are only examples of embodiments from which other drawings may be derived by those skilled in the art without the exercise of inventive faculty. In the drawings:
fig. 1 is an isometric view of the appearance of a "wideband, frequency selective bellows fluid damper strut for damping satellite vibrations" of the present invention.
Fig. 2 is a top view of a "wideband, frequency selective bellows fluid damping strut suppressing satellite vibration" of the present invention.
FIG. 3 is a cross-sectional view A-A of FIG. 2 of a "wideband, frequency selective bellows fluid damping strut suppressing satellite vibration" of the present invention.
Fig. 4 is a top view of a piston assembly in a "wideband, frequency selective bellows fluid damping strut suppressing satellite vibration" of the present invention.
FIG. 5 is a cross-sectional view B-B of FIG. 4 of a "wideband, frequency selective bellows fluid damping strut suppressing satellite vibration" of the present invention.
FIG. 6 is a schematic diagram showing a comparison of the mechanical model of the "wideband, frequency selective bellows fluid damping strut suppressing satellite vibration" of the present invention with the mechanical model of a prior two-parameter, three-parameter damper.
FIG. 7 is a graphical representation of the vibration transfer rate curve of a "wideband, frequency selective bellows fluid damper strut suppressing satellite vibration" in accordance with the present invention in comparison to the vibration transfer rate curve of a conventional two-parameter, three-parameter damper.
FIG. 8 is a schematic diagram of the main bellows assembly of the "wideband, frequency selective bellows fluid damper strut suppressing satellite vibration" of the present invention.
Fig. 9 is a schematic diagram of the structure of a secondary bellows assembly in a "wideband, frequency selective bellows fluid damper strut for damping satellite vibrations" according to the present invention.
Fig. 10 is a schematic structural view of a primary and secondary bellows connecting flange in a "broadband, frequency selective bellows fluid damping strut for damping satellite vibrations" according to the present invention.
FIG. 11 is a schematic illustration of the structure of a machined spring assembly in the "wideband, frequency selective bellows fluid damper strut" of the present invention for damping satellite vibrations.
Fig. 12 is a schematic view of the structure of the snap ring of fig. 11 of the "broadband, frequency selective bellows fluid damping strut suppressing satellite vibrations" of the present invention.
FIG. 13 is a schematic structural view of an upper connector assembly in a broadband, frequency selective bellows fluid damping strut for damping satellite vibrations in accordance with the present invention.
Fig. 14 is a schematic structural view of an intermediate connector in the "broadband, frequency selective bellows fluid damping strut for suppressing satellite vibration" of the present invention.
Fig. 15 is a schematic view of the structure of the lower connector assembly of the "wideband, frequency selective bellows fluid damper strut for damping satellite vibrations" of the present invention.
FIG. 16 is an isometric view of a wideband, frequency selective bellows fluid damper strut for efficient satellite vibration damping of the present invention, with a schematic view of the overall structure in quarter cut-away;
in the drawings, the list of components represented by the various numbers is as follows:
1. an upper connector assembly 11, a connecting screw rod with a flexible hinge 12 and an upper connector body; 2. an intermediate connection; 3. a lower connector assembly 31, a connecting screw rod 32 and a lower connector body; 4. a secondary bellows assembly 41, a secondary bellows 42, a secondary bellows first flange 43, a secondary bellows second flange 44, and a volume adjusting end cover; 5. a main bellows and auxiliary bellows connecting flange; 6. a seal ring; 7. a main bellows assembly, 71, a main bellows, 72, a main bellows first flange, 73, a main bellows second flange; 8. the piston assembly, 81, the piston, 82, the fixed damping hole, 83, the frequency valve, 831, the valve core, 832, the valve core spring, 833, the valve seat; 9. machining a spring assembly 91, machining a spring 92 and a clamping ring; 101. a lower buffer chamber; 102. an upper buffer chamber; 131. a lower fluid passage; 132. an upper fluid passage; 141. a lower main chamber; 142. an upper main chamber; 15. silicone oil; 16. two-parameter damper mechanics model; 17. a three-parameter damper mechanical model; 18. a mechanical model of a broadband and frequency selective bellows fluid vibration damping strut for suppressing satellite vibration.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Description of the embodiments
The invention will now be described in further detail with reference to the accompanying drawings.
Referring to fig. 1-16, in this embodiment, a broadband, frequency selective bellows fluid damping strut for damping satellite vibrations is provided, which includes a piston assembly 8, a main bellows assembly 7, a secondary bellows assembly 4, a primary and secondary bellows connecting flange 5, a seal ring 6, silicone oil 15, a machined spring assembly 9, an upper connector assembly 1, a middle connector 2, and a lower connector assembly 3.
Referring to fig. 1, 2, 3, 10 and 16, two sets of main bellows assemblies 7 are distributed above and below the piston assembly 8, and are connected with the piston assembly 8 through first flanges 72 thereof by bolts and nuts, and sealing rings 6 are arranged between the two sets of main bellows assemblies 7 and the piston assembly 8; the first flanges 42 of the two sets of auxiliary bellows assemblies 4 are respectively connected with the second flanges 73 of the two sets of main bellows assemblies 7 by bolts and nuts through the two sets of main and auxiliary bellows connecting flanges 5, and sealing rings 6 are respectively arranged between each set of main bellows assemblies 7 and the main and auxiliary bellows connecting flanges 5 and between the main and auxiliary bellows connecting flanges 5 and the auxiliary bellows assemblies 4. Thus, in the above assembly, symmetrical sealed cavities are formed above and below the piston assembly 8. The upper sealed containing cavity is divided into an upper main cavity 142 corresponding to the main bellows assembly 8, an upper buffer cavity 102 corresponding to the auxiliary bellows assembly 4, and an upper fluid channel 132 formed between the auxiliary bellows assembly 4 and the main and auxiliary bellows connecting flange 5 and connecting the upper main cavity 142 and the upper buffer cavity 102; the lower sealed vessel is divided into a lower main chamber 141 corresponding to the main bellows assembly 8, a lower buffer chamber 101 corresponding to the sub bellows assembly 4, and a lower fluid passage 131 formed between the sub bellows assembly 4 and the main and sub bellows connecting flange 5, connecting the lower main chamber 141 and the lower buffer chamber 101. Preferably, silicone oil 15 is filled as a working medium in the sealed cavities above and below the piston assembly 8.
Referring to fig. 1, 2, 3, 10, 14 and 16, two sets of intermediate connectors 2 are respectively connected with a main bellows connecting flange 5 and a secondary bellows connecting flange 5 which are positioned above and below a piston assembly 8 by bolts and nuts at the upper ends and the lower ends, so that the two sets of intermediate connectors are arranged symmetrically left and right; the upper connecting piece assembly 1 is positioned above the middle connecting piece 2, the middle part of the upper connecting piece assembly is connected with the piston assembly 8 through a screw, and the lower part of the upper connecting piece assembly is connected with a clamping ring 92 in the machined spring assembly 9 through a screw; the lower connecting piece assembly 3 is positioned below the middle connecting piece 2, and the upper part of the lower connecting piece assembly is connected with the main and auxiliary bellows connecting flange 5 positioned below the piston assembly 8 through bolts and nuts; the machined spring assembly 9 is located inside the lower connector assembly 3, and has its lower end screwed to the lower connector assembly 3 and its upper end snap ring 92 screwed to the lower portion of the upper connector assembly 1.
Referring to fig. 4 and 5, the piston assembly 8 includes a piston 81, a fixed orifice 82, and a frequency valve 83. Preferably, a fixed damping hole 82 is processed in the middle of the piston 81 as a main damping hole, and the length-diameter ratio of the main damping hole accords with the category of thick-wall small holes, namely 0.5< l/d is less than or equal to 4; the frequency valves 83 comprise a valve core 831, a valve core spring 832 and a valve seat 833, preferably, a plurality of frequency valves 83 are circumferentially and uniformly distributed or symmetrically distributed around the fixed damping hole 82, and the number, normally open or normally closed form and valve parameters of the frequency valves 83 can be optimally designed according to the requirements of a specific vibration isolation system.
Referring to fig. 8, the main bellows assembly 7 includes a main bellows 71, a main bellows first flange 72 and a main bellows second flange 73, preferably, the first flange 72 and the second flange 73 are in 90 ° dislocation design in azimuth, so that the overall design of the vibration damping strut is facilitated, and the main bellows 71 is connected with the first flange 72 and the second flange 73 in a welding manner.
Referring to fig. 9, the secondary bellows assembly 4 includes a secondary bellows 41, a secondary bellows first flange 42, a secondary bellows second flange 43, and a volume adjusting end cap 44, the volume adjusting end cap 44 is located above the secondary bellows 41 and is connected with the secondary bellows second flange 43 by a screw, and a sealing ring 6 is disposed between the volume adjusting end cap 44 and the secondary bellows second flange 43, preferably, the secondary bellows 41 is connected with the first flange 42 and the second flange 43 thereof by welding.
Referring to fig. 11 and 12, machined spring assembly 9 includes machined spring 91 and snap ring 92. Preferably, the machined spring 91 is in the form of a transverse groove spring, and in a natural state, the force-exerting part of the snap ring 92 is positioned at the middle position in the clamping groove at the upper part of the transverse groove spring 91, the gaps between the upper surface and the lower surface of the snap ring and the transverse groove spring 91 are equal, and the gap amount can be optimally designed according to the situation of a specific vibration isolation system.
Referring to fig. 13 and 15, the upper connector assembly 1 comprises an upper connector body 12, a connecting screw 11 with a flexible hinge, preferably, the connecting screw 11 with the flexible hinge is coated with a thread compound and is fastened in threaded connection with the upper connector body 12; the lower connector assembly 3 comprises a lower connector body 32 and a connecting screw 31, wherein the connecting screw 31 is fastened with the upper connector body 32 through threaded connection after being coated with thread compound.
Referring to fig. 6, the mechanical model of the present embodiment is composed of a three-parameter damper mechanical model with only damping, and a two-stage stiffness element with a gap element in parallel. Compared with the existing mechanical model of the three-parameter damper, the damping device not only provides the damping with adaptability and the rigidity with adaptability and variability, so that the vibration isolation performance with wide frequency band and excellent performance is achieved in a passive mode, and the reliability of a satellite system is improved.
Referring to fig. 7, in this embodiment, because the piston 81 is provided with the fixed damping hole 82 and the combined variable hydraulic damping of the plurality of frequency valves 83 is superimposed, not only the vibration transmission rate of the vibration isolator in the low frequency band, particularly in the formant region, is significantly reduced, but also the vibration transmission rate can be further reduced in the high frequency band as required, so that the embodiment has adaptive hydraulic damping in a wide frequency band and has excellent performance; and meanwhile, a machined spring with excellent linearity is designed to serve as the second-stage rigidity, so that the embodiment can adapt to and meet the vibration and impact environments of satellites in different stages.
The invention designs a broadband frequency selective corrugated pipe fluid vibration damping strut for inhibiting satellite vibration, which is arranged between a vibration-isolated load or structure and a foundation, can provide large rigidity and large damping in an environment with random low-frequency and large-amplitude energy as a main part in an active section, and can provide small rigidity and small damping in an environment with random high-frequency and small-amplitude energy as a main part in an orbit section; for large-size effective load, in order to improve reliability, a locking mode is generally adopted in the active section, under the working condition, the invention can continuously adapt to and meet the compression requirement of a locking state, and when the effective load of the track section is unlocked and released, the impact energy of the effective load can be effectively relieved, and after the effective load is put into normal work, the micro-vibration between the effective load and a foundation can be obviously restrained. Therefore, the technical scheme provided by the invention provides an efficient broadband frequency selective corrugated pipe fluid vibration reduction support for a satellite system, a precise effective load or structure is protected in an active section, and the working quality of the precise effective load and a satellite is improved in an on-orbit section.
What is not described in detail in this specification is prior art known to those skilled in the art.
The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions. The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (10)
1. The utility model provides a broadband, frequency selective bellows fluid damping pillar of suppression satellite vibration, includes piston assembly, main bellows subassembly, vice bellows subassembly, main vice bellows flange, sealing washer, silicone oil, machining spring assembly, goes up connecting piece subassembly, intermediate junction spare and lower connecting piece subassembly, its characterized in that: the two sets of main bellows assemblies are distributed above and below the piston assembly and are connected with the piston assembly through bolts and nuts through first flanges of the main bellows assemblies, and sealing rings are arranged between the two sets of main bellows assemblies and the piston assembly; the first flanges of the two sets of auxiliary bellows assemblies are respectively connected with the second flanges of the two sets of main bellows assemblies by bolts and nuts through the two sets of main and auxiliary bellows connecting flanges, and sealing rings are respectively arranged between each set of main bellows assemblies and the connecting flanges and between the connecting flanges and the auxiliary bellows assemblies;
and symmetrical sealed cavities are formed above and below the piston assembly, and each sealed cavity is divided into a main cavity corresponding to the main bellows assembly, a buffer cavity corresponding to the auxiliary bellows assembly and a fluid channel formed between the auxiliary bellows assembly and the main and auxiliary bellows connecting flanges and used for connecting the main cavity with the buffer cavity.
2. The broadband, frequency selective bellows fluid vibration-damping strut for damping satellite vibrations according to claim 1, wherein silicone oil is poured into the sealed cavities above and below the piston assembly as a working medium.
3. The broadband, frequency selective bellows fluid damping strut for damping satellite vibrations according to claim 1, wherein the upper and lower ends of the two sets of intermediate connectors are respectively connected with the main and auxiliary bellows connecting flanges located above and below the piston assembly by bolts and nuts to form a bilateral symmetry arrangement, the upper connector assembly is located above the intermediate connectors, the middle parts of the upper connector assembly are connected with the piston assembly by screws, and the lower parts of the upper connector assembly are connected with the clamping rings in the machined spring assembly by screws.
4. A broadband, frequency selective bellows fluid damping strut for damping satellite vibrations according to claim 3, wherein the lower connector assembly is located below the intermediate connector and the upper portion thereof is connected to the primary and secondary bellows connection flanges located below the piston assembly by bolts and nuts; the machining spring assembly is positioned in the lower connecting piece assembly, the lower end of the machining spring assembly is connected with the lower connecting piece assembly through a screw, and the upper end clamping ring is connected with the lower part of the upper connecting piece assembly through a screw.
5. The broadband, frequency selective bellows fluid vibration-damping strut for suppressing satellite vibration according to claim 1, wherein the piston assembly comprises a piston, a fixed damping hole and a frequency valve, wherein a fixed damping hole is formed in the middle of the piston as a main damping hole, and the aspect ratio of the main damping hole is in accordance with the category of thick-wall small holes, namely 0.5< l/d is less than or equal to 4.
6. The broadband, frequency selective bellows fluid vibration-damping strut for damping satellite vibrations according to claim 5, wherein the frequency valves comprise valve seats, valve cores and valve core springs, and a plurality of frequency valves are circumferentially and uniformly or symmetrically distributed around the fixed damping hole, and the number, normally open or normally closed form and valve parameters of the frequency valves are optimized according to the requirements of a specific vibration isolation system.
7. The broadband frequency selective bellows fluid vibration-damping strut for inhibiting satellite vibration according to claim 1, wherein the main bellows assembly comprises a main bellows, a main bellows first flange and a main bellows second flange, the first flange and the second flange are designed in 90 degrees dislocation in azimuth, and the main bellows is connected with the first flange and the second flange in a welding mode; the auxiliary bellows assembly comprises an auxiliary bellows, an auxiliary bellows first flange, an auxiliary bellows second flange and a volume adjusting end cover, wherein the volume adjusting end cover is positioned above the auxiliary bellows and is connected with the auxiliary bellows second flange through screws, a sealing ring is arranged between the volume adjusting end cover and the auxiliary bellows second flange, and the auxiliary bellows is connected with the first flange and the second flange through welding.
8. A broadband, frequency selective bellows fluid vibration-damping strut for damping satellite vibrations according to claim 1, wherein the machined spring assembly comprises a machined spring and a snap ring, the machined spring being in the form of a cross-slot spring, the snap ring force portion being in a neutral position within the upper clamping slot of the cross-slot spring, the gaps being equal between the upper and lower surfaces thereof and the cross-slot spring, the amount of gap being optimized in accordance with the circumstances of the vibration-isolation system.
9. The broadband, frequency selective bellows fluid damping strut for damping satellite vibrations according to claim 1, wherein the upper connector assembly comprises an upper connector body, a flexible hinged connector screw, the flexible hinged connector screw being threaded with a thread compound and being threadably secured to the upper connector body.
10. The broadband, frequency selective bellows fluid damping strut for damping satellite vibrations according to claim 1, wherein the lower connector assembly comprises a lower connector body, a connecting screw, and the connecting screw is screwed and fastened to the upper connector body after being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835608.1A CN117847136A (en) | 2023-12-28 | 2023-12-28 | Broadband and frequency selective bellows fluid vibration damping strut for inhibiting satellite vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835608.1A CN117847136A (en) | 2023-12-28 | 2023-12-28 | Broadband and frequency selective bellows fluid vibration damping strut for inhibiting satellite vibration |
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| Publication Number | Publication Date |
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| CN117847136A true CN117847136A (en) | 2024-04-09 |
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|---|---|---|---|
| CN202311835608.1A Pending CN117847136A (en) | 2023-12-28 | 2023-12-28 | Broadband and frequency selective bellows fluid vibration damping strut for inhibiting satellite vibration |
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| CN (1) | CN117847136A (en) |
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- 2023-12-28 CN CN202311835608.1A patent/CN117847136A/en active Pending
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