CN110486418A - A kind of symmetrical cantilever rod-type dynamic vibration absorber - Google Patents
A kind of symmetrical cantilever rod-type dynamic vibration absorber Download PDFInfo
- Publication number
- CN110486418A CN110486418A CN201910653162.8A CN201910653162A CN110486418A CN 110486418 A CN110486418 A CN 110486418A CN 201910653162 A CN201910653162 A CN 201910653162A CN 110486418 A CN110486418 A CN 110486418A
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- CN
- China
- Prior art keywords
- undersetting
- fastener
- symmetrical
- cantilever
- vibration absorber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 15
- 239000007769 metal material Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
-
- 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
-
- 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
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides a kind of symmetrical cantilever rod-type dynamic vibration absorber, including cantilever lever, mass block fastener, mass block, upper bracket fastener, upper bracket, undersetting fastener and undersetting；2 mass blocks are fixed on cantilever lever by fastener, and cantilever lever is clipped between upper bracket and undersetting, and 2 mass blocks are symmetrical about upper and lower support；Upper bracket is coupled by fastener with undersetting；Undersetting is coupled by fastener with equipment.The symmetrical cantilever rod-type dynamic vibration absorber of the present invention can effectively reduce frequency modulation work, while have the characteristics that frequency modulation is quick, performance is stable.
Description
Technical field
The invention belongs to Control Technique of Vibration and Noise field, in particular to a kind of symmetrical cantilever rod-type dynamic vibration absorber.
Background technique
Dynamic vibration absorber is to reduce that mechanical equipment line spectrum is efficient, reliable method, is gradually applied.Bump leveller is existing
Structure type there are many, such as spring type, cantilever rod-type, diaphragm-type.Wherein, the advantages of cantilever rod-type bump leveller is to pass through tune
Whole cantilever lever is long to can be realized quickly and easily frequency modulation, and cantilever lever stiffness characteristics are stablized, and are able to maintain vibration absorbing performance and stablize work
Make.The shortcomings that cantilever rod-type bump leveller is that absorbing frequency is not only related with cantilever lever, also related with installation point impedance.Difference installation
The cantilever rod-type bump leveller of position requires frequency modulation, thus frequency-modulating process can be made very complicated, hamper engineer application.
Therefore, for frequency modulation work is effectively reduced, the cantilever rod-type suction of a kind of absorbing frequency and installation point impedance decoupling is needed
Shake device, and domestic bump leveller is not possible to meet above-mentioned requirements at present.
Summary of the invention
The purpose of the present invention is to provide the symmetrical cantilever rod-type power suctions of a kind of absorbing frequency and installation point impedance decoupling
Shake device, can effectively reduce frequency modulation work, while having the characteristics that frequency modulation is quick, performance is stable.
Realize that technical scheme is as follows:
A kind of symmetrical cantilever rod-type dynamic vibration absorber, including the fastening of cantilever lever, mass block fastener, mass block, upper bracket
Part, upper bracket, undersetting fastener and undersetting；
2 mass blocks are fixed on cantilever lever by fastener, and cantilever lever is clipped between upper bracket and undersetting, and 2
Mass block is symmetrical about upper and lower support；Upper bracket is coupled by fastener with undersetting；Undersetting is joined by fastener and equipment
It connects.
Further, there is an identical screw thread of length at cantilever lever both ends of the present invention, the mass block be equipped with it is described
The threaded hole being threadedly engaged, the structure can make mass block shift position on cantilever lever.
It further, is rectangle, the upper branch with the cross section of upper undersetting contact-segment among cantilever lever of the present invention
Seat lower part is equipped with rectangular slot, has rectangular slot at the top of the undersetting, which can prevent cantilever lever around axial rotation.
Further, it is greater than the spiral shell at both ends among cantilever lever of the present invention with the cross section side length of upper undersetting contact-segment
Line diameter, the structure can be with auxiliary boom bars and upper and lower centering.
Further, mass block of the present invention is cylindrical body, which can make along any radial absorbing frequency phase
Together.
Further, there is symmetrical aperture in mass block side of the present invention, which can assist rotating mass block position.
Further, each constituent element is metal material on bump leveller of the present invention.
Beneficial effect
It is an advantage of the invention that absorbing frequency and installation point impedance decoupling, can effectively reduce frequency modulation work, while having tune
The characteristics of frequency is quick, performance stabilization, high-low temperature resistant, antiseptic and rustproof, radiation resistance, resistance to greasy dirt, can be widely used for the severe ring of naval vessels
In border.
Detailed description of the invention
Fig. 1 is the main view of bump leveller.
Wherein, 1- cantilever lever, 2- mass block fastener, 3- mass block, 4- upper bracket fastener, 5- upper bracket prop up under 6-
Seat fastener, 7- undersetting.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
Embodiment 1, a kind of symmetrical cantilever rod-type dynamic vibration absorber of the present embodiment, including cantilever lever 1, mass block fastener 2,
Mass block 3, upper bracket fastener 4, upper bracket 5, undersetting fastener 6 and undersetting 7.2 mass blocks 3 pass through fastener 2
It is fixed on cantilever lever 1, and is arranged symmetrically about upper and lower support 5,7, which can make vibration absorbing structure have symmetry；Cantilever
Bar 1 is clipped between upper bracket 5 and undersetting 7；Upper bracket 5 is coupled by fastener 4 with undersetting 7；Undersetting 7 passes through fastener
6 couple with equipment.
Rectangular slot is arranged at 5 lower part of upper bracket, there is rectangular slot, the upper bracket 5 and lower branch at the top of the undersetting 7
The rectangular slot of seat 7 cooperates；Among the cantilever lever 1 and cross section of upper undersetting contact-segment is rectangle, which can
To prevent cantilever lever around axial rotation.There is the identical screw thread of length at 1 both ends of cantilever lever；It is connect among the cantilever lever 1 with support 5,7
The cross section side length for touching section is greater than the diameter of thread at both ends, which can be with auxiliary boom bar and upper and lower centering.
Have threaded hole among the mass block 3, for being threadedly engaged on cantilever lever 1, allow mass block outstanding
It is moved on armed lever；The mass block 3 is cylindrical body, and side is equipped with symmetrical aperture, which can assist rotating mass block position
It sets.
There are four through-hole, upper bracket fastener 4 passes through the through-hole and is fixed on down upper bracket 5 at 5 top of upper bracket
On support 7；There are four through-hole, undersetting fasteners 6 to be fixed on undersetting 7 across the through-hole and set for 7 bottom of undersetting
It is standby.
Absorbing of embodiment of the present invention frequency is that cantilever lever mode of flexural vibration and installation point are curved with the reason of installation point impedance coupler
Bent impedance coupler.When bump leveller structure is symmetrical about median plane, the cantilever lever bending moment on median plane both sides offsets each other, from
And it realizes cantilever lever mode of flexural vibration and installation point bend resistance and decouples.
Specific installation step is as follows:
(1) cantilever lever 1 is clipped between upper bracket 5 and undersetting 7, keeps cantilever lever 1 symmetrical about median plane, tighten fastening
Part 4；
(2) 2 mass blocks 3,4 harness fasteners 2 are mounted on cantilever lever 1, adjust the position of mass block 3, tightens fastening
Part 2；
(3) bump leveller is placed in the predetermined installation site of equipment, tightening fastener parts 6.
Application method is as follows:
Firstly, the performance indicator (absorbing frequency) according to bump leveller determines position of the mass block on cantilever lever.
According to bump leveller frequency equation(E is cantilever lever elasticity modulus of materials, I is that cantilever lever is transversal
Face the moment of inertia, M are the quality of mass block, L is distance of the mass block mass center to cantilever lever fixing end) it is found that rotating mass block, L
Change, to change frequencies omega.Mass block rotates one week, the variable quantity only one screw pitch of L, therefore available realization is quickly and accurately
Frequency modulation.
Secondly, assembling bump leveller according to installation step, and test the intrinsic frequency of bump leveller.Optionally, it can adjust quality
The physical location of block, until the intrinsic frequency of bump leveller is accurately matched with design value, to realize best shock attenuation result.
Embodiment 2 can change the material of mass block 3 into higher copper of density etc. from steel on the basis of embodiment 1
Material.In this way, the size of mass elements can be further decreased, keep bump leveller more compact.
Mass block 3 can be changed to rectangular or rectangle etc. by cylinder on the basis of embodiment 1 or 2 by embodiment 3, with
Adapt to the requirement of certain particular frequencies.
Embodiment 4 can use double nut, locking pad on the basis of embodiment 1 or 2 or 3 in mass block fastener 2
Piece etc., thus locking realizing.
Embodiment 5, on the basis of embodiment 1 or 2 or 3, enabling each component part of the present invention is metal structure, to have
There is the characteristics of performance stabilization, high-low temperature resistant, antiseptic and rustproof, radiation resistance, resistance to greasy dirt.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (7)
1. a kind of symmetrical cantilever rod-type dynamic vibration absorber, which is characterized in that including cantilever lever (1), mass block fastener (2), matter
Gauge block (3), upper bracket fastener (4), upper bracket (5), undersetting fastener (6) and undersetting (7)；
2 mass blocks (3) are fixed on cantilever lever (1) by fastener, and cantilever lever (1) is clipped in upper bracket (5) and undersetting (7)
Between, and 2 mass blocks (3) are symmetrical about upper and lower support (5,7)；Upper bracket (5) passes through upper bracket fastener (4) and lower branch
Seat (7) connection；Undersetting (7) is coupled by undersetting fastener (6) with equipment.
2. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that cantilever lever (1) both ends have
The identical screw thread of length, the mass block (3) are equipped with and the threaded hole being threadedly engaged.
3. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that the cantilever lever (1) it is intermediate with
The cross section of upper and lower support (5,7) contact-segment is rectangle, and upper bracket (5) lower part is equipped with rectangular slot, the undersetting
(7) rectangular slot is arranged at top.
4. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that the cantilever lever (1) it is intermediate with
The cross section side length of upper and lower support (5,7) contact-segment is greater than the diameter of thread at both ends.
5. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that the mass block (3) is cylinder
Body.
6. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that mass block (3) side has
Symmetrical aperture.
7. symmetrical cantilever rod-type dynamic vibration absorber according to claim 1, which is characterized in that respectively composition is first on the bump leveller
Part is metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653162.8A CN110486418A (en) | 2019-07-19 | 2019-07-19 | A kind of symmetrical cantilever rod-type dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653162.8A CN110486418A (en) | 2019-07-19 | 2019-07-19 | A kind of symmetrical cantilever rod-type dynamic vibration absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110486418A true CN110486418A (en) | 2019-11-22 |
Family
ID=68547459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910653162.8A Pending CN110486418A (en) | 2019-07-19 | 2019-07-19 | A kind of symmetrical cantilever rod-type dynamic vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110486418A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886802A (en) * | 2019-12-04 | 2020-03-17 | 中国直升机设计研究所 | Novel annular vibration isolation device of helicopter |
| CN112389642A (en) * | 2020-10-30 | 2021-02-23 | 哈尔滨飞机工业集团有限责任公司 | Dynamic vibration absorber structure for helicopter vibration reduction |
| CN112431896A (en) * | 2020-10-28 | 2021-03-02 | 北京工业大学 | Symmetrical cantilever type self-adaptive frequency modulation metal silica gel vibration absorption device |
| CN114233806A (en) * | 2021-12-23 | 2022-03-25 | 苏州东菱智能减振降噪技术有限公司 | Cantilever type vibration-damping and impact-resisting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615496A (en) * | 2013-12-05 | 2014-03-05 | 哈尔滨工程大学 | Cantilever beam type vibration absorber with adjustable frequency |
| CN104500644A (en) * | 2014-12-09 | 2015-04-08 | 中国电子科技集团公司第三十八研究所 | Multifunctional pendulum-type vibration absorbing device |
| CN210889918U (en) * | 2019-07-19 | 2020-06-30 | 中国船舶重工集团公司第七一九研究所 | Symmetrical cantilever rod type dynamic vibration absorber |
-
2019
- 2019-07-19 CN CN201910653162.8A patent/CN110486418A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615496A (en) * | 2013-12-05 | 2014-03-05 | 哈尔滨工程大学 | Cantilever beam type vibration absorber with adjustable frequency |
| CN104500644A (en) * | 2014-12-09 | 2015-04-08 | 中国电子科技集团公司第三十八研究所 | Multifunctional pendulum-type vibration absorbing device |
| CN210889918U (en) * | 2019-07-19 | 2020-06-30 | 中国船舶重工集团公司第七一九研究所 | Symmetrical cantilever rod type dynamic vibration absorber |
Non-Patent Citations (1)
| Title |
|---|
| 郭有松 等: "军用船舶动力吸振器性能与参数优化研究", 《舰船科学技术》, vol. 36, no. 7, 31 July 2014 (2014-07-31), pages 48 - 52 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886802A (en) * | 2019-12-04 | 2020-03-17 | 中国直升机设计研究所 | Novel annular vibration isolation device of helicopter |
| CN112431896A (en) * | 2020-10-28 | 2021-03-02 | 北京工业大学 | Symmetrical cantilever type self-adaptive frequency modulation metal silica gel vibration absorption device |
| CN112389642A (en) * | 2020-10-30 | 2021-02-23 | 哈尔滨飞机工业集团有限责任公司 | Dynamic vibration absorber structure for helicopter vibration reduction |
| CN114233806A (en) * | 2021-12-23 | 2022-03-25 | 苏州东菱智能减振降噪技术有限公司 | Cantilever type vibration-damping and impact-resisting device |
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