CN206738531U - A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic - Google Patents
A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic Download PDFInfo
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- CN206738531U CN206738531U CN201720442886.4U CN201720442886U CN206738531U CN 206738531 U CN206738531 U CN 206738531U CN 201720442886 U CN201720442886 U CN 201720442886U CN 206738531 U CN206738531 U CN 206738531U
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- radial direction
- hollow out
- wedge
- low frequency
- periodic structure
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- 230000000737 periodic effect Effects 0.000 title claims abstract description 26
- 238000013016 damping Methods 0.000 title claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011089 mechanical engineering Methods 0.000 description 2
- 238000005316 response function Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Abstract
A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic, including the multiple solid circles set from inside to outside, wedge is provided between neighboring solid annulus, solid circle is engraved structure with the not connected part of wedge, wedge from inside to outside rotates at an angle, because gear is during transmission, the axle being connected with gear hub is by the vibration for being transmitted through coming during gear drive, vibration is then delivered to other positions of machine by being constantly delivered to again on axle, machine is triggered to produce vibration, the utility model has simple in construction, the characteristics of practical.
Description
Technical field
Antiresonance antivibration area is the utility model is related to, more particularly to a kind of radial direction with middle low frequency vibration damping characteristic
Hollow out periodic structure gear hub.
Background technology
Antiresonance referred in elastic system under the incentive action of some specific frequencies, and system is overall or some position meetings
Occur vibrating static phenomenon.By rationally designing the structural parameters of system, vibration can be suppressed in the range of certain frequency
Propagate.Antiresonance theory has a wide range of applications in mechanical field.
In engineering machinery, gear can produce different degrees of vibration and noise when running at high speed, and can not only reduce tooth
The service life of wheel, but also noise pollution can be caused, influence the health of staff.Therefore, vibration and noise reducing is to improving
Plant equipment precision, increase service life of equipment border etc. is all significant.The method for reducing gear vibration at present mainly has
Two classes, first, reducing the generation of vibration, that is, improve manufacture and the installation accuracy of the parts such as gear；Second, pass through the technologies such as vibration isolation
To reduce caused vibration.But above technology is extremely difficult to good effectiveness in vibration suppression, gear is inevitable in transmission
Meeting produce vibration.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model has middle low frequency vibration damping in offer one kind
The radial direction hollow out periodic structure gear hub of characteristic, encourage for axial excitation, radial direction and tangentially encourage in many middle low frequencies
All there is the characteristic of vibration decay in section, there is the characteristics of simple in construction, practical.
In order to achieve the above object, the technical solution adopted in the utility model is：
A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic, including set from inside to outside more
Individual solid circle 2, wedge 1 is provided between neighboring solid annulus 2, wedge 1 is not provided between neighboring solid annulus 2
Part be engraved structure, from inside to outside, every layer of wedge 1 rotates at an angle relative to last layer.
Described solid circle 2 is in radial direction periodic arrangement from inside to outside.
The central angle of described wedge 1 is 18 °.
Described solid circle 2 is five layers, and wedge 1 is four layers.
It is four per the wedge 1 between neighboring solid annulus 2, is uniformly arranged.
The angle that described every layer of wedge 1 uniform from inside to outside rotates successively is respectively 36 ° clockwise, 36 °, 36 °
With 54 °.
The external diameter of described outmost turns solid circle 2 is 180mm, and the internal diameter of innermost circle solid circle 2 is 90mm, adjacent reality
Radial direction hollow out distance between heart annulus 2 is 15mm, and the radial width of solid circle 2 is 15mm, the axial height of solid circle 2
For 24mm, the axial height of wedge 1 positioned at the axial height center of solid circle 2 is 8mm.
The beneficial effects of the utility model are：
The utility model radial direction hollow out periodic structure, encourage for axial excitation, radial direction and tangentially encourage in a lot
All there is the characteristic of vibration decay in low-frequency range；It vibrates the frequency range of decay can also be by adjusting the knot of solid circle and wedge
Structure parameter is adjusted.The utility model radial direction hollow out periodic structure gear hub has in mechanical engineering potentially applies valency
Value, can weaken vibration of the gear in middle low frequency.
Brief description of the drawings
Fig. 1 is the utility model structure front view.
Fig. 2 is the utility model structural profile view.
Fig. 3 is the view of the utility model axial vibration Propagation Simulation and experimental result.
Fig. 4 is the view of the utility model radial vibration Propagation Simulation and experimental result.
Fig. 5 is the view of the utility model tangential vibrations Propagation Simulation and experimental result.
Fig. 6 is the shadow that the utility model solid circle axial height H encourages the lower vibration of structure first decay frequency range to radial direction
Loud view.
Fig. 7 is the influence that the utility model wedge axial height w encourages the lower vibration of structure first decay frequency range to radial direction
View.
When Fig. 8 is that the proportion of the radial width m of the present utility model for being radial direction hollow out distance n and solid circle changes
The view of the influence of lower first vibration decay frequency range is radially encouraged to structure.
Embodiment
Narration in detail is made to structural principle of the present utility model and operation principle below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of radial direction hollow out periodic structure gear with middle low frequency vibration damping characteristic of the utility model
Wheel hub, including multiple solid circles 2, solid circle 2 in radial direction periodic arrangement from inside to outside, neighboring solid annulus 2 it
Between connected by four wedges 1.Four wedges 1 are uniformly distributed in circumferencial direction, and the central angle of each wedge is 18 °,
And the radial direction angle that four uniform wedges 1 rotate successively from inside to outside is respectively 36 ° clockwise, 36 °, 36 ° and
54°。
In the utility model, in order that obtaining structure has certain strength and stiffness, the material of whole hollow out disc structure
All use 45 steel, specific material parameter is as shown in table 1.Dimensional parameters：The external diameter of outmost turns solid circle 2 is d=180mm,
The internal diameter of innermost circle solid circle 2 is r=45mm, and the radial direction hollow out distance between neighboring solid annulus 2 is n=15mm, solid
The radial width of annulus 2 is m=15mm, and the axial height of solid circle 2 is H=24mm, in the axial height of solid circle 2
The axial height of wedge 1 of the heart is w=8mm, and wedge rotates a certain angle a=36 ° from inside to outside, b=18 °, each wedge
C=18 ° of the central angle of shape block.
Material parameter is shown in Table 1.
Table 1
| Material | Young's modulus | Poisson's ratio | Density |
| No. 45 steel | 2.09e11Pa | 0.269 | 7890 |
It is two specific embodiments of the present utility model below, gives 3D solid structure and swash in axial excitation, radially
Encourage and tangentially encourage the damping behavior of the radial direction hollow out periodic structure in lower middle low-frequency range under free boundary condition；Change structure
Influence of the parameter to its first vibration decay frequency range in the case where radial direction encourages.
Embodiment 1
Axial excitation, as shown in figure 3, structure 740~1397Hz, 1681~1867Hz and 3258~3970Hz it
Between exist obviously vibrate attenuation region.It can be seen that the comparing result of emulation and experiment is preferable, intrinsic frequency
Relative error be no more than 10%, the error belongs in engineer applied in acceptable zone of reasonableness.
Radially encourage, as shown in figure 4, the attenuation range of vibration nearly 1500Hz especially between 409~1856Hz
There is very good effectiveness in vibration suppression in frequency range, as can be seen from the figure or even decaying in a big chunk frequency range internal vibration
More than up to -20dB, vibration can be regarded as and be totally constrained.Extracting in figure frequency where emulation and experiment frequency response function peak value can be with
Obtain relative error and be no more than 5%, in the zone of reasonableness that engineering allows.
Tangential excitation, as shown in figure 5, experiment and the result of emulation are corresponding very good at medium-high frequency, but in middle low frequency
It is convenient in order to apply tangential impulse load to structure when testing, a diameter of 8mm, and fitted bolt, spiral shell are machined in structure
Fit clearance between bolt and screwed hole be present, low-frequency effects are larger in gap pair when tapping so that intrinsic frequency is known clearly
Skew so that encourage the structural frequency response measured to have certain difference with what simulation model calculated.
Embodiment 2
Change solid circle thickness axial height H, from Fig. 6 it may be seen that as radial direction hollow out periodic structure is solid
Axial height at annulus becomes big, and structure lower boundary frequency of the first vibration decay frequency range in the case where radial direction encourages is kept not substantially
Become, but the frequency at coboundary moves toward low frequency, so that the vibration decay frequency range of structure first narrows.
Change the axial height w of wedge, as can be seen from Figure 7 constantly become big, knot with the axial height of wedge
Structure coboundary of the first vibration decay frequency range in the case where radial direction encourages gradually rises, and then gradually tends to be steady, axial height is
The duty-cycle axial height of vibration decay more nearly 400Hz when be 4mm during 20mm, so if only considering structure to radial direction
The vibration decay of low-frequency range during excitation is lower, thicker hollow out junction is clearly more favourable.
When radial direction hollow out distance n and the radial width m of solid circle proportion change, as can see from Figure 8,
Diminish with m change big n, the coboundary of structure first vibration decay frequency range in the case where radial direction encourages is toward high-frequency mobile, lower boundary
Slightly moved toward low frequency, when the width at hollow out position is very narrow, structure has very superior vibration isolation capability to radial direction excitation,
Work as m=25mm, structure all has effectiveness in vibration suppression in 376Hz~2323Hz nearly in 2000Hz frequency range during n=5mm.
It can be seen that using structure of the present utility model, can cause：
Structure middle low frequency under axial excitation, radially excitation and tangential excitation has very excellent damping behavior.
By adjusting its structural parameters, to structure, the first vibration decay frequency range in the case where radial direction encourages is adjusted.
Therefore, the utility model radial direction hollow out periodic structure can apply to mechanical engineering, weaken gear in middle low frequency
Vibration.
Operation principle of the present utility model：
The utility model devises a kind of new radial direction hollow out periodic structure, and the structure can regard gear as in theory
Hub portion, be different from the solid disc structure of conventional gears wheel hub, periodicity hollow out is presented in the structure in radial directions,
Two adjacent solid circles 2 are connected in the uniform wedge 1 in four, hollow out position, from inside to outside four uniform wedge shapes
The also rotation at an angle of block 1.Because gear is during transmission, the axle being connected with gear hub is by gear drive
The vibration come is transmitted through in journey, vibration is then delivered to other positions of machine by being constantly delivered to again on axle, trigger machine production
Raw vibration.It can be seen from the rudimentary knowledge of Theory of Vibration, for many-degrees of freedom system, exist between two rank intrinsic frequencies
One antiresonant frequency, so-called antiresonance refer to that system is whole in elastic system under the incentive action of some specific frequencies
Body or some positions, which occur, vibrates static phenomenon.If being analyzed using the concept of mechanical impedance, anti_resonance phenomena is also
It is that system of saying the situation that receptance (dynamic flexibility) is zero occurs in some frequencies.By above radial direction hollow out periodic structure frequency response
Curve understands, the intrinsic frequency of the frequency response function peak of curve frequency of radial direction hollow out periodic structure just counter structure, especially right
Radially for excitation, the frequency range between formant vibrates attenuation region there is obvious, so in radial direction hollow out periodic structure
Caused by the vibration decay of low frequency is due to the antiresonance characteristic of structure.
Claims (7)
1. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic, it is characterised in that including by introversion
Multiple solid circles (2) of outer setting, wedge (1), neighboring solid annulus (2) are provided between neighboring solid annulus (2)
Between to be not provided with the part of wedge (1) be engraved structure, from inside to outside, every layer of wedge (1) is with respect to last layer in certain
Angle rotates.
2. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 1, its
It is characterised by, described solid circle (2) is in radial direction periodic arrangement from inside to outside.
3. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 1, its
It is characterised by, the central angle of described wedge (1) is 18 °.
4. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 1, its
It is characterised by, described solid circle (2) is five layers, and wedge (1) is four layers.
5. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 4, its
It is characterised by, the wedge (1) between every neighboring solid annulus (2) is four, is uniformly arranged.
6. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 5, its
It is characterised by, the angle that described every layer of wedge (1) uniform from inside to outside rotates successively is respectively 36 ° clockwise, 36 °,
36 ° and 54 °.
7. a kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic according to claim 1, its
It is characterised by, the external diameter of the solid circle (2) described in outmost turns is 180mm, and the internal diameter of innermost circle solid circle (2) is 90mm,
Radial direction hollow out distance between neighboring solid annulus (2) is 15mm, and the radial width of solid circle (2) is 15mm, solid circle
(2) axial height is 24mm, and wedge (1) axial height positioned at solid circle (2) axial height center is 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720442886.4U CN206738531U (en) | 2017-04-25 | 2017-04-25 | A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720442886.4U CN206738531U (en) | 2017-04-25 | 2017-04-25 | A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic |
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| Publication Number | Publication Date |
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| CN206738531U true CN206738531U (en) | 2017-12-12 |
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| CN201720442886.4U Expired - Fee Related CN206738531U (en) | 2017-04-25 | 2017-04-25 | A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939931A (en) * | 2017-04-25 | 2017-07-11 | 西安建筑科技大学 | A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic |
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2017
- 2017-04-25 CN CN201720442886.4U patent/CN206738531U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939931A (en) * | 2017-04-25 | 2017-07-11 | 西安建筑科技大学 | A kind of radial direction hollow out periodic structure gear hub with middle low frequency vibration damping characteristic |
| CN106939931B (en) * | 2017-04-25 | 2024-02-02 | 西安建筑科技大学 | Radial hollow periodic structure gear hub with medium-low frequency vibration damping characteristic |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 |