CN109667881B - Anti-impact friction vibration isolator - Google Patents
Anti-impact friction vibration isolator Download PDFInfo
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- CN109667881B CN109667881B CN201811493805.9A CN201811493805A CN109667881B CN 109667881 B CN109667881 B CN 109667881B CN 201811493805 A CN201811493805 A CN 201811493805A CN 109667881 B CN109667881 B CN 109667881B
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- mandrel
- spring
- friction
- vibration
- cavity
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- 238000002955 isolation Methods 0.000 claims abstract description 17
- 238000013016 damping Methods 0.000 claims abstract description 13
- 125000006850 spacer group Chemical group 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000703 anti-shock Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Abstract
The invention discloses a novel anti-impact friction vibration isolator. The vibration isolator comprises a base, a cover body, a mandrel, a baffle, a vibration damping pad, a spacer, a first spring, a tension spring, a friction plate and a second spring. The vibration isolator has vibration isolation capacity in three directions, and can bear different loads and adapt to different vibration environments by changing the rigidity of the first spring, the second spring, the tension spring and the vibration damping pad. Furthermore, the arc cylindrical cavity of the vibration isolator can limit the vertical displacement of the mandrel, and the vibration reduction pad can limit the lateral displacement of the mandrel, so that the effect of large impact load can be effectively prevented.
Description
Technical Field
The invention relates to the technical field of vibration isolation, in particular to an anti-impact friction vibration isolator.
Background
The large impact load can be generated in the running process of the vehicles such as airplanes, vehicles, ships and the like, and the large value impact load can bring huge vibration displacement to the equipment on the vehicles, so that the running reliability of the equipment is reduced. In order to improve the reliability of the devices, it is therefore necessary to mount these devices in shock isolation.
The existing vibration isolators of wire mesh, rubber and the like have good vibration isolation capability, but the isolation capability for large impact load is not ideal. Under the action of large impact load, the metal wire mesh pad is easy to generate plastic deformation, and the rubber material is torn, so that the vibration isolator fails. The vibration isolators without the resonance peak disclosed in the prior art, namely CN03131862.2 and ZL201520039978.9, have the capability of impact isolation, but the vibration isolators are complex in structure, large in number of parts and difficult in processing and assembling processes. The invention provides a novel friction vibration isolator which is relatively simple in structure, easy to realize and capable of preventing impact and isolation; the ability of vibration isolation without resonance peak can be realized by reasonably designing the rigidity of the expansion spring and the rigidity of the spring.
Disclosure of Invention
Object of the Invention
It is an object of the present invention to provide a vibration isolator which overcomes or at least alleviates at least one of the above mentioned technical problems of the prior art.
Technical solution of the invention
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an anti-shock friction isolator, isolator includes base, lid, dabber, separation blade, damping pad, spacing piece, first spring, rises tension spring, friction disc, second spring.
The cover end of the base is provided with a concave arc-shaped cylindrical surface, the cover end of the cover body is provided with a concave arc-shaped cylindrical surface, and the base and the cover body are covered to form a cavity with an arc-shaped cylindrical surface; the mandrel is arranged in the arc-shaped cylindrical surface cavity and divides the arc-shaped cylindrical surface cavity into a first cavity and a second cavity; the first spring, the isolating piece, the vibration damping pad and the blocking piece form a series connection body which is sleeved on the long shaft of the mandrel and arranged in the first cavity; the second spring is sleeved on the short shaft of the mandrel and arranged in the second cavity; the long shaft of the mandrel penetrates out of a hole in the middle of the cover body and is used for being connected with vibration isolation equipment; four through holes are reserved in the flange plate at the lower end of the base and used for being connected with a foundation.
Preferably, the mandrel of the vibration isolator comprises a long shaft, a boss and a short shaft which are connected with each other, one end of the long shaft is used for connecting a device to be subjected to vibration isolation, the boss is provided with a radial annular groove, and the short shaft is used for clamping one end of the second spring.
Preferably, a friction plate is arranged in an annular groove of a boss of a mandrel of the vibration isolator.
Preferably, the friction plate of the vibration isolator is fan-shaped, the small circular end is provided with a groove which extends from the end face of the small circular end to the large circular end and has a U-shaped cross section along the radial direction, and the large circular end is a cambered surface.
Preferably, the number of the friction plates of the vibration isolator is at least 2, and the friction plates are combined in the annular direction to form an annular shape; a tensioning spring is arranged in the groove of the U-shaped section of the friction plate, so that the friction plate can be expanded outwards, and the cambered surface of the friction plate can be tightly combined with the cambered cylindrical surface formed by covering the base and the cover body.
The friction plate of the vibration isolator can only slide up and down in the arc cylindrical cavity, so that friction damping is provided, and the vibration isolator plays a role in vibration reduction; the arc-shaped cylindrical surface has the shrinkage characteristic along the upper and lower parts, so that the displacement of the friction plate during the up-and-down sliding is limited, and the vertical displacement of the mandrel is limited; the long shaft end of the mandrel is provided with a damping pad, and the damping pad can limit the lateral displacement of the mandrel.
THE ADVANTAGES OF THE PRESENT INVENTION
The invention has the advantages that:
the vibration isolator has the advantages of simple structure of parts, small quantity and convenience in assembly. The vibration isolator is closely matched, the structural size of the vibration isolator can be designed according to actual needs, and the vibration isolator is convenient to use and install. The vibration isolator limits the vertical displacement of the friction plate through an arc cylindrical cavity formed by the base and the cover body, so that the vertical displacement of the core shaft is limited, and the vibration isolator can effectively prevent large-displacement vibration caused by the action of vertical large impact load from damaging vibration isolation equipment; the lateral displacement of the mandrel is limited through the vibration damping pad, so that the vibration isolation equipment can be effectively prevented from being damaged due to large displacement vibration caused by the action of lateral large impact load; the ability of vibration isolation without resonance peak can be realized by reasonably designing the rigidity of the expansion spring and the rigidity of the spring.
Drawings
Fig. 1 is an appearance schematic diagram of the anti-impact friction vibration isolator.
Fig. 2 is a schematic cross-sectional view of an impact friction resistant isolator of the present invention.
Fig. 3 is a schematic view of the mandrel configuration.
FIG. 4 is a schematic structural view of a friction plate.
In the drawings: 1-base, 2-cover, 3-mandrel, 4-baffle, 5-damping pad, 6-spacer, 7-first spring, 8-tension spring, 9-friction plate, 10-second spring, 11-lower arc-shaped cylindrical surface, 21-upper arc-shaped cylindrical surface, 12-first cavity, 13-second cavity, 31-long shaft, 32-boss, 33-annular groove, 34-short shaft, 91-groove and 92-cambered surface.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the accompanying drawings, please refer to fig. 1 to 4.
Fig. 1 to 4 show structural schematic diagrams of an anti-impact friction vibration isolator in an embodiment of the invention, and the vibration isolator includes a base 1, a cover 2, a mandrel 3, a baffle 4, a damping pad 5, a spacer 6, a first spring 7, a tension spring 8, a friction plate 9, and a second spring 10.
One end of the base 1 is a flange, the other end of the base is a covered end, the covered end is provided with a concave arc-shaped cylindrical surface 11 groove, and the covered end is also provided with an external thread for covering; one end of the cover body 2 is a cover closing end, the cover closing end is provided with a concave arc-shaped cylindrical surface 21 groove, the cover closing end is also provided with an internal thread for closing, and the middle part of the other end is provided with a round hole. The base 1 and the cover 2 are closed, so that a cavity with an arc-shaped cylindrical surface is formed.
Referring specifically to fig. 3, the mandrel 3 is of an inverted cross shape, divided into a major axis 31, a boss 32, a minor axis 34, and an outwardly facing annular recess 33 in the boss 32.
Specifically, the mandrel 3 may be divided into a first chamber 12 and a second chamber 13 by being placed in the arc-shaped cylindrical cavity. A first spring 7, a spacer 6, a vibration damping pad 5 and a baffle 4 form a series connection body which is sleeved on the long shaft 31 of the mandrel 3 and is arranged in the first cavity; the second spring 7 is sleeved on the short shaft 34 of the mandrel 3 and is arranged in the second cavity.
Referring specifically to fig. 4, the friction plate 9 is fan-shaped, the small circular end is provided with a groove 91 with a U-shaped cross section extending from the end face of the small circular end to the large circular end in the radial direction, and the large circular end is an arc 92.
The friction plates 9 are arranged in the annular groove 33 on the boss 32 of the mandrel 3, the number of the friction plates of the vibration isolator is 4 in the embodiment, and the friction plates are combined in the annular direction to form an annular shape; the friction plate 9 can be expanded outwards by the tension spring 8 arranged in the groove (91) with the U-shaped section of the friction plate 9, so that the cambered surface 92 of the friction plate 9 can be tightly combined with the cambered cylindrical surface formed by covering the base 1 and the cover body 2.
Specifically, a suitable clearance is left between the friction plate 9 and the annular groove 33, and it is ensured that the friction plate 9 can perform expansion/contraction movement in the annular groove 33 in the radial direction thereof.
Specifically, the long end of the mandrel 3 penetrates out of a hole in the middle of the cover body 2 for connecting with the vibration isolation equipment; four through holes are reserved on the flange plate at the lower end of the base 1 and are used for being connected with a foundation.
Specifically, by properly designing the stiffness of the tension spring 8 and the stiffness of the first spring 7 and the second spring 10, the capability of vibration isolation without resonance peak can be realized.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical proposal described in the embodiments can be modified, or some technical features can be equally replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. An impact-resistant friction isolator, characterized in that: the vibration isolator comprises a base (1), a cover body (2), a mandrel (3), a baffle plate (4), a vibration damping pad (5), a spacer (6), a first spring (7), a tension spring (8), a friction plate (9) and a second spring (10); wherein,
the covering end of the base (1) is provided with a concave arc-shaped cylindrical surface (11), the covering end of the cover body (2) is provided with a concave arc-shaped cylindrical surface (21), and the base (1) and the cover body (2) are covered to form a cavity with an arc-shaped cylindrical surface;
the mandrel (3) is arranged in the cavity, and the mandrel (3) divides the cavity into a first cavity (12) and a second cavity (13);
the first spring (7), the isolating piece (6), the vibration damping pad (5) and the blocking piece (4) form a series connection body which is sleeved on the long shaft (31) of the mandrel (3) and is arranged in the first cavity;
the second spring is sleeved on a short shaft (34) of the mandrel (3) and arranged in the second cavity;
a long shaft (31) of the mandrel (3) penetrates out of a hole in the middle of the cover body (2) and is used for being connected with vibration isolation equipment;
the mandrel (3) comprises a long shaft (31), a boss (32) and a short shaft (34) which are connected with each other, one end of the long shaft (31) is used for being connected with a device to be subjected to vibration isolation, an annular groove (33) is formed in the boss (32) in the radial direction, and the short shaft (34) is used for clamping one end of the second spring (10); and a friction plate (9) is arranged in an annular groove (33) of the boss (32) of the mandrel (3).
2. An impact-resistant friction vibration isolator as claimed in claim 1, characterized in that said friction plates (9) are fan-shaped, the small circular end is provided with a groove (91) with a U-shaped cross section extending from the end face of the small circular end to the large circular end, and the large circular end is an arc face (92).
3. An impact-resistant friction isolator as claimed in claim 2 wherein the number of friction plates is at least 2, the friction plates being arranged in circumferential combination to form a ring.
4. The anti-impact friction vibration isolator as claimed in claim 1, 2 or 3, wherein the expansion spring (8) is arranged in the groove (91) of the friction plate (9) to expand the friction plate (9) outwards, so that the cambered surface (92) of the friction plate (9) can be tightly combined with the cambered cylindrical surface formed by covering the base (1) and the cover body (2).
5. An impact-resistant friction vibration isolator as claimed in claim 1, characterized in that the flange at the lower end of the base (1) is provided with four through holes for connection to a foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493805.9A CN109667881B (en) | 2018-12-07 | 2018-12-07 | Anti-impact friction vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493805.9A CN109667881B (en) | 2018-12-07 | 2018-12-07 | Anti-impact friction vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109667881A CN109667881A (en) | 2019-04-23 |
| CN109667881B true CN109667881B (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811493805.9A Active CN109667881B (en) | 2018-12-07 | 2018-12-07 | Anti-impact friction vibration isolator |
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| Country | Link |
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| CN (1) | CN109667881B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332268B (en) * | 2019-06-26 | 2021-09-03 | 中国飞机强度研究所 | Rigidity self-adaptation isolator |
| CN111664207A (en) * | 2020-05-12 | 2020-09-15 | 北京强度环境研究所 | Variable damping friction pair of base type metal shock absorber |
| CN111649086B (en) * | 2020-06-05 | 2022-02-22 | 中国电子科技集团公司第三十六研究所 | Variable friction damping vibration isolator with stepless pre-pressure adjustment function |
| CN111649087B (en) * | 2020-06-05 | 2022-05-10 | 中国电子科技集团公司第三十六研究所 | Variable friction damping vibration isolator with adjustable central position |
| CN112963487A (en) * | 2021-01-22 | 2021-06-15 | 中国人民解放军92578部队 | Piston type molecular spring vibration isolator |
| CN114738438B (en) * | 2022-04-02 | 2024-05-24 | 中国飞机强度研究所 | Vibration isolation buffer device |
| CN115535800B (en) * | 2022-11-30 | 2023-03-17 | 杭州静之源噪声控制技术有限公司 | Vibration damping unit and vibration damping device for traction machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100564B (en) * | 1985-04-01 | 1988-02-24 | 南京工学院 | Isolation damper without resonant peaks |
| SU1626017A2 (en) * | 1989-02-08 | 1991-02-07 | Войсковая Часть 11284 | Friction shock absorber |
| CN1195399C (en) * | 2003-06-12 | 2005-03-30 | 季馨 | Nonfrontal module impact resistant vibration isolator |
| CN201621225U (en) * | 2009-12-23 | 2010-11-03 | 中国飞机强度研究所 | Invertedly-mounted vibration isolation device |
| CN201916407U (en) * | 2010-12-14 | 2011-08-03 | 中国飞机强度研究所 | High-damping three-way vibration isolator |
| CN202402541U (en) * | 2011-12-27 | 2012-08-29 | 中国飞机强度研究所 | Three-way metal vibration isolator |
| CN104930100B (en) * | 2015-06-14 | 2017-05-31 | 中国电子科技集团公司第十研究所 | High-effect dry-friction damping spring vibration-isolator |
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2018
- 2018-12-07 CN CN201811493805.9A patent/CN109667881B/en active Active
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| CN109667881A (en) | 2019-04-23 |
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