CN101709755B - Slotted cylinder variable frication damper - Google Patents
Slotted cylinder variable frication damper Download PDFInfo
- Publication number
- CN101709755B CN101709755B CN2009102225600A CN200910222560A CN101709755B CN 101709755 B CN101709755 B CN 101709755B CN 2009102225600 A CN2009102225600 A CN 2009102225600A CN 200910222560 A CN200910222560 A CN 200910222560A CN 101709755 B CN101709755 B CN 101709755B
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- CN
- China
- Prior art keywords
- cylinder barrel
- damper
- friction ring
- perps
- frictional ring
- 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.)
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Abstract
The invention relates to a slotted cylinder variable frication damper which can be applied to building structure vibration reduction control and engine vibration reduction. The damper comprises a cylinder barrel, a frictional ring and a sliding axle, wherein a vertical slot is arranged at the middle part of the cylinder barrel; the internal diameter of the cylinder barrel is equal everywhere; the frictional ring is arranged in the vertical slot of the cylinder barrel and aligned with the center of the vertical slot; the size of the vertical slot along the length direction of the cylinder barrel is larger than the axial length size of the frictional ring; the external diameter of the frictional ring is slightly larger than the internal diameter of the cylinder barrel; the frictional ring has the compressibility; the cylinder barrel has the expansibility; the axes of the frictional ring and the sliding axle are superposed and connected into a whole; and one side of both end surfaces of the frictional ring facing towards the inner wall of the cylinder barrel is provided with a circular arc chamfer. The damper can simultaneously meet the vibration reduction requirement during the strong vibration and the weak vibration of building structure.
Description
Technical field
The present invention relates to a kind of slotted cylinder variable frication damper, can be applicable to control of building structure vibration damping and locomotive vibration damping.Also can be used for making the damper in fields such as space flight, electronics, chemical industry, the energy, instrument, medical treatment, health.
Background technique
Frcition damper is the control gear that a class is utilized the friction energy-dissipating dissipation vibrational energy of rubbing surface.The core position of common frcition damper is the one or more pairs of rubbing surfaces with certain precompression, and external force need overcome the rubbing surface generation relative movement that frictional force between the rubbing surface just can be ordered about damper.The major defect of conventional frcition damper comprises:
1). the rubbing surface of general frcition damper for building is in high compressive pre-stress state all the time, and the rubbing surface friction factor may change under this long-term high-stress state, departs from the working state of desired design.
2). the precompression of general frcition damper and the attribute of rubbing surface all can not change automatically, thereby its surface friction drag that provides also remains unchanged usually, and the hysteresis loop of damper is near rectangle.Damper with rectangle hysteresis loop is in engineering is used, and the most key problem is how to determine the action intensity of vibrating load, because the maximum friction resistance of this type of damper is in case determine just can not change.Such as in the antidetonation and wind force proofing design of building structure, if according to the situation design frcition damper of bestirring oneself by force under using, then this damper weak bestir oneself with under can not slide, if and determine force of sliding friction by the weak situation of shaking, then this damper bestir oneself by force with under will not reach desirable effectiveness in vibration suppression because the tonnage of exerting oneself is too small.Because the intensity of the geological process that faces of building structure can not accurately predict, thus in building structure, adopt this type of frcition damper as damping means exist shake by force and a little less than the problem of shaking and can not take into account.
Summary of the invention
The present invention is in order to solve the above-mentioned defective of existing frcition damper, a kind of slotted cylinder variable frication damper has been proposed, each parts of damper are in low-stress state when the behavior of structure friction, damper work the time then provide the damping force that increases with displacement amplitude, this damper can satisfy simultaneously engineering structure shake by force with a little less than vibration damping requirement when shaking.
To achieve these goals, the present invention has taked following technological scheme:
A kind of slotted cylinder variable frication damper includes cylinder barrel, friction ring, sliding axle, it is characterized in that: described cylinder barrel has perps in the middle, and internal diameter of cylinder equates everywhere; Friction ring be installed on cylinder barrel open perps the position and with perps along the axial direction center-aligned; The friction ring external diameter is greater than internal diameter of cylinder; Perps on the cylinder barrel is along the size of the axial direction axial length dimension greater than friction ring; Friction ring has compressibility, and cylinder barrel has expansiveness, will produce erection stress when friction ring is packed cylinder barrel into, and friction ring produces compression, and cylinder barrel outwards expands; Because the existence of perps, cylinder barrel is opened the perps place radial constraint rigidity of friction ring is lowered, and opens the erection stress that produces on the surface of contact of the inwall at perps position and friction ring outer wall at cylinder barrel and will not have erection stress on perps position and the friction ring outer wall surface of contact less than cylinder barrel; The dead in line of friction ring and sliding axle is connected as a whole; Two end faces of friction ring are provided with circular arc chamfering towards a side of inner wall of cylinder.
The slotted cylinder variable frication damper that the present invention proposes can obtain following beneficial effect:
When 1) original state, damper sliding axle were not slided with respect to cylinder barrel, friction ring was positioned at cylinder barrel and opens the perps position, and the erection stress of friction ring and cylinder barrel is produced by the radial constraint of the barrel of having opened seam.But the barrel radial constraint rigidity after owing to crack is far below before cracking, thereby the erection stress between this moment friction ring and the cylinder barrel is in the low-level stage.
2) when damper is worked, sliding axle will drive friction ring and leave cylinder barrel perps zone gradually, and clamp-on the position that cylinder barrel does not crack, because the external diameter of friction ring is greater than internal diameter of cylinder, cylinder barrel not the radial constraint rigidity of vent portion much larger than the place of cracking, all bigger erection stress be will produce in friction ring and the cylinder barrel, direct stress and friction stress on surface of contact, produced simultaneously.The relative cylinder barrel slip of sliding axle amplitude is big more, and friction ring is clamp-oned cylinder barrel, and the surface of contact of vent portion is not big more, and the surface of contact surface friction drag of Chan Shenging also just increases thereupon thereupon; When sliding axle when maximum displacement is returned, friction ring and the cylinder barrel not surface of contact of vent portion progressively reduce, the surface friction drag that damper provides also just reduces thereupon.In this process, the damping force that damper provides increases with the displacement of sliding axle.
3) damper of the present invention's proposition provides the change friction damping force.The damping force of this damper will increase with the increase of distortion amplitude, can satisfy simultaneously that engineering structure is shaken by force and a little less than vibration damping requirement when shaking.
Description of drawings:
Fig. 1 is the unitary construction figure of the slotted cylinder variable frication damper that proposes of the present invention;
Fig. 2 is the a-a sectional drawing of the slotted cylinder variable frication damper that proposes of the present invention;
Fig. 3 is friction ring and the initial contact position of cylinder barrel and the relative size detail drawing of the embodiment of the invention 1;
Fig. 4 is the hysteresis loop of the embodiment of the invention 1;
Among the figure: 1, cylinder barrel, 2, friction ring, 3, sliding axle, 4, the perps on the cylinder barrel, U, displacement, F, power.
Embodiment
Below in conjunction with embodiment the present invention is further specified.
As Figure 1-3, a kind of slotted cylinder variable frication damper includes cylinder barrel 1, friction ring 2, sliding axle 3, and cylinder barrel 1 has perps 4 in the middle; Friction ring 2 be installed on cylinder barrel 1 open perps 4 the position and with perps 4 center-aligned; Perps 4 is along the size of the cylinder barrel length direction axial length dimension greater than friction ring 2; The external diameter of friction ring 2 is a bit larger tham the internal diameter of cylinder barrel 1; Friction ring 2 has compressibility, and cylinder barrel 1 has expansiveness; The dead in line of friction ring 2 and sliding axle 3 is connected as a whole; Two end faces of friction ring 2 are provided with circular arc chamfering towards a side of cylinder barrel 1 inwall.
The present embodiment slotted cylinder variable frication damper can provide to become the friction damping force hysteresis loop, Figure 4 shows that the hysteresis loop of present embodiment slotted cylinder variable frication damper.
More than be exemplary embodiments of the present invention, enforcement of the present invention is not limited thereto.
Claims (1)
1. a slotted cylinder variable frication damper includes cylinder barrel (1), friction ring (2), sliding axle (3), and it is characterized in that: described cylinder barrel (1) has perps (4) in the middle; Friction ring (2) be installed on cylinder barrel (1) open perps (4) the position and with perps (4) along the axial direction center-aligned; Perps (4) is along the size of the cylinder barrel length direction axial length dimension greater than friction ring (2); The external diameter of friction ring (2) is a bit larger tham the internal diameter of cylinder barrel (1); Friction ring (2) has compressibility, and cylinder barrel (1) has expansiveness; Friction ring (2) is connected as a whole with the dead in line of sliding axle (3); Two end faces of friction ring (2) are provided with circular arc chamfering towards a side of cylinder barrel (1) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102225600A CN101709755B (en) | 2009-11-20 | 2009-11-20 | Slotted cylinder variable frication damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102225600A CN101709755B (en) | 2009-11-20 | 2009-11-20 | Slotted cylinder variable frication damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101709755A CN101709755A (en) | 2010-05-19 |
| CN101709755B true CN101709755B (en) | 2011-11-23 |
Family
ID=42402555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102225600A Expired - Fee Related CN101709755B (en) | 2009-11-20 | 2009-11-20 | Slotted cylinder variable frication damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101709755B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864340B (en) * | 2015-01-23 | 2019-05-28 | 青岛海尔滚筒洗衣机有限公司 | A kind of damping changing impact damper |
| CN107237083B (en) * | 2016-03-29 | 2023-07-14 | 无锡小天鹅电器有限公司 | Pulsator washing machine and door cover assembly of pulsator washing machine |
| CN109667871B (en) * | 2018-11-16 | 2020-10-30 | 张胜利 | Damper of wearable rehabilitation device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709080A (en) * | 1952-01-01 | 1954-05-12 | Jerzy Dabrowski | Improvements in or relating to frictional shock absorbers or dampers |
| DE19704214A1 (en) * | 1997-02-05 | 1998-08-06 | Mannesmann Sachs Ag | Vibration damper fabricated in thin sheet metal |
| CN2426930Y (en) * | 2000-03-17 | 2001-04-18 | 东南大学 | Engineering structure damping fluid bumper |
| CN1420969A (en) * | 2000-03-29 | 2003-05-28 | 洛德公司 | Magnetically controlled friction damper |
| CN1726355A (en) * | 2002-12-12 | 2006-01-25 | 株式会社富国 | Damper |
| CN201554811U (en) * | 2009-11-20 | 2010-08-18 | 北京工业大学 | Slotted type cylindrical friction variable damper |
-
2009
- 2009-11-20 CN CN2009102225600A patent/CN101709755B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709080A (en) * | 1952-01-01 | 1954-05-12 | Jerzy Dabrowski | Improvements in or relating to frictional shock absorbers or dampers |
| DE19704214A1 (en) * | 1997-02-05 | 1998-08-06 | Mannesmann Sachs Ag | Vibration damper fabricated in thin sheet metal |
| CN2426930Y (en) * | 2000-03-17 | 2001-04-18 | 东南大学 | Engineering structure damping fluid bumper |
| CN1420969A (en) * | 2000-03-29 | 2003-05-28 | 洛德公司 | Magnetically controlled friction damper |
| CN1726355A (en) * | 2002-12-12 | 2006-01-25 | 株式会社富国 | Damper |
| CN201554811U (en) * | 2009-11-20 | 2010-08-18 | 北京工业大学 | Slotted type cylindrical friction variable damper |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-193012A 2002.07.10 |
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| Publication number | Publication date |
|---|---|
| CN101709755A (en) | 2010-05-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20121120 |