CN105297937A - Friction-force-changeable damper - Google Patents
Friction-force-changeable damper Download PDFInfo
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- CN105297937A CN105297937A CN201510748260.1A CN201510748260A CN105297937A CN 105297937 A CN105297937 A CN 105297937A CN 201510748260 A CN201510748260 A CN 201510748260A CN 105297937 A CN105297937 A CN 105297937A
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- sliding panel
- friction plate
- frictional force
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Abstract
The invention relates to a friction-force-changeable damper which comprises an upper friction plate, a lower friction plate and a middle sliding plate. Multiple sets of small friction blocks are arranged at one end of the sliding plate, and each set of small friction blocks comprise the upper small friction block and the lower small friction block which are arranged on the two sides of the sliding plate. The upper friction plate and the lower friction plate are each formed by overlapping three layers, grooves are formed in the middles of the outmost layers, and balls are arranged in the grooves; the middle layers are flat plates and are arranged on the balls on the outmost layers, the uppermost layers are divided into 5 parts in the sliding direction, the friction coefficients are enlarged in sequence from the middle to the two sides, and rolling friction is achieved in the middle. The friction-force-changeable damper can be used for wind resistance and vibration resistance of structures and equipment; when the friction-force-changeable damper is used in cooperation with a TMD and a vibration isolation system, the vibration isolation and reduction effects of the system can be greatly improved, and the system is started in time under a small load to come into play; under a large load, overlarge displacement of the system is limited while the vibration reduction effect is ensured.
Description
Technical field
The present invention relates to a kind of damper, especially a kind of frictional force variable damper, is mainly used in the wind resistance of structure and equipment, seismic resistance field, also can improve its control effects with the conbined usage such as earthquake isolating equipment, TMD.
Background technology
In order to the wind alleviating structure and equipment shake, seismic response, dissipative damping device dissipation energy can be arranged in structure and equipment, reach and reduce the object of structural response.Dissipative damping device can be divided into four classes by its Energy Dissipation Mechanism: viscoelastic damper, viscous damper, metal damper and frcition damper.Wherein frcition damper structure is simple, cheap, easily safeguards, is more suitable for applying.But the mostly similar rectangle of its hysteretic behavior, namely there is a threshold (playing sliding power), after load exceedes this value, device starts to slide, and during slip, its rigidity becomes 0, and frictional force size is constant.The hysteretic characteristic of frcition damper makes its control effects change with external load size.In addition, due to strong non-linear, make the analysis and design comparatively linear dampers difficulty of damper.In order to overcome this shortcoming of normal frcition damper, Li Hongnan etc. have invented half active piezoelectric frcition damper (publication number is CN1594775A), change frictional force, but device are complicated by changing normal pressure size, need certain energy, implement and acquire a certain degree of difficulty.
In addition, the shortcoming of constant frictional force can only be provided to overcome normal frcition damper, applicant had once applied for patent " plate-type friction-changing damper ", the basic ideas of this invention are: in sliding friction block sliding process, normal pressure size is constant, the rubbing surface of rectangle is divided into 3 parts, intermediate friction face friction factor is little, and both sides rubbing surface friction factor is large.When brake pad is static, contact with intermediate friction face, when brake pad starts to slide, the large both sides rubbing surface of friction factor is slided to from the intermediate friction face that friction factor is little, along with the increase of displacement, the large friction factor area that slide block contacts increases, and frictional force increases thereupon.In particular embodiments, middle friction coefficient region is installed ball (needle roller) or is coated with teflon coating, and test afterwards proves, the damper starting friction power of this two schemes is comparatively large, and frictional force adjustable extent is less.In addition, because brake pad is overall, out-of-flatness small on rubbing surface will cause normal pressure at different friction area skewness, and the actual force-displacement curve of damper and theoretical displacement curve be there are differences, and effect is undesirable.
Summary of the invention
Based on the problems referred to above, the present invention proposes a kind of frictional force variable damper.In order to solve the technical problem of the immutable and discontinuity of conventional friction damper frictional force size.
Technical scheme of the present invention is as follows:
A kind of frictional force variable damper, comprises the sliding panel of friction plate, lower friction plate and centre, cross section in the upper and lower friction plate of " recessed " font and the sliding panel of centre be pressed on together by pretension bolt; A disk spring is also compressed with between the nut of described pretension bolt and upper friction plate or lower friction plate; It is characterized in that: sliding panel one end of described centre is provided with some groups of friction blocks, often organize upper and lower two friction blocks that friction block comprises sliding panel both sides, between friction block and sliding panel, be provided with flexible member; Described sliding panel two edge glide direction is provided with band screw-bearing; Described band screw-bearing can roll along upper and lower friction plate both sides bossing inwall; Described upper and lower friction plate is formed by stacking by three layers, is provided with groove in the middle of outermost layer, places ball in groove; Intermediate layer is one flat plate, is placed on the ball of outermost layer, can move relative to outermost layer; The superiors are divided into 5 parts along glide direction, are arranged symmetrically with from centre to both sides, are respectively No. 1 rubbing surface of center, No. 3 rubbing surfaces on No. 2 adjacent rubbing surfaces and both sides; Described No. 1 rubbing surface arranges by the needle roller arranged in the rectangle hole in the middle of the superiors rolling friction face formed; The upper and lower contact surface of described needle roller row is friction block and intermediate layer respectively; The friction factor of described No. 1 rubbing surface, No. 2 rubbing surfaces and No. 3 rubbing surfaces increases successively; It is in aggregates that described outermost layer and the superiors' end bosses are bolted installation.
Further, along the arrangement of sliding panel glide direction, and there is not relative displacement with sliding panel in glide direction in described friction block; Described slip strip small column, is inserted in hole corresponding to friction block.
Further, the friction factor of described No. 1 rubbing surface is 0.005.
Further, described ball arranges retainer, and retainer and friction plate skin are fixed.
Further, the face of described intermediate layer and ball contact arranges arc groove, play the guiding role to its motion.
Further, described needle roller row is provided with retainer, and retainer and the friction plate the superiors are fixed.
Further, the upper friction plate of described frictional force variable damper is connected with building structure, and middle slip plate is connected with the mass of TMD.
Operating principle of the present invention is: when damper displacement is zero, friction block on sliding panel is positioned at No. 1 rubbing surface in the middle of rubbing surface, friction block and needle roller are arranged end face and are contacted, due to needle roller, row does not all fix relative to its upper and lower contact surface, damper slides only need overcome rolling friction, and it is very little that damper plays sliding power; When damper displacement increases, friction block and No. 2 rubbing surface contacts area strengthen gradually, and frictional force increases gradually; When damper displacement arrives certain limit greatly, friction block contacts with No. 3 rubbing surfaces, because No. 3 rubbing surface friction factor are very large, thus realizes quick and stable braking.
Beneficial effect:
1. frictional force of the present invention increases with displacement and increases, and has limit function.May be used for the wind resistance of structure and equipment, antidetonation, during with TMD, shock isolation system conbined usage, greatly can improve shock insulation, the damping effect of system, system be started in time under small load, plays a role; The over-large displacement of restriction system ensure damping effect under large load while.
2. the present invention is based on the equally distributed hypothesis of normal pressure, utilize the change of rubbing surface friction factor to realize frictional force and increase with displacement and increase.By adopting some groups of independence friction blocks to replace the large brake pad of monoblock, realize differentiated friction region normal pressure identical, frictional force phenomenon pockety on the zones of different rubbing surface can effectively avoiding the small out-of-flatness of rubbing surface to cause.Its simple structure, clear principle.
3. " friction-changing damper " the of the present invention operating principle of arranging based on needle roller, achieves real rolling friction in territory, low friction zone, adds the adjustable extent of damper frictional force.It is very little that it plays sliding power, damper can be made to play a role under very little excitation, and add limit function, makes damper can not under large excitation, and displacement is excessive.
4. the present invention installs and structurally can not produce additional stiffness to structure afterwards, can not affect the self-vibration characteristic of structure itself.Meanwhile, the present invention can do very large, also can do very little, not be only applicable to heavy construction, also be applicable to the vibration damping of small building and equipment.Its structure is simple, cheap, is easy to produce, and is suitable for applying in structure and equipment seismic resistance field.
5. present invention, avoiding conventional linear damper (as oil damper) cost high, safeguard complicated, the shortcoming of easy oil leakage; Overcome normal frcition damper in the problem that can not keep same control effects under different size load action.
Accompanying drawing explanation
Fig. 1 is frictional force variable damper constructional drawing of the present invention;
Fig. 2 is friction plate plan view in the present invention;
Fig. 3 is A-A sectional drawing in Fig. 2;
Fig. 4 is B-B sectional drawing in Fig. 2;
Fig. 5 is C-C sectional drawing in Fig. 2;
Fig. 6 is A1-A1 sectional drawing in Fig. 2;
Fig. 7 is A2-A2 sectional drawing in Fig. 2;
Fig. 8 is A3-A3 sectional drawing in Fig. 2;
Fig. 9 is A4-A4 sectional drawing in Fig. 2;
Figure 10 is friction plate outermost layer plan view of the present invention;
Figure 11 is sliding panel plan view of the present invention;
Figure 12 is A1-A1 sectional drawing in Figure 11;
Figure 13 is A2-A2 sectional drawing in Figure 11;
Figure 14 is A-A sectional drawing in Figure 11;
Figure 15 is B-B sectional drawing in Figure 11;
Figure 16 is C-C sectional drawing in Figure 11;
In figure, the upper friction plate of 1-; Friction plate under 2-; 3-sliding panel; 4-pretension bolt; 5-disk spring; 6-friction block; 7-small column; 8-flexible member; 9-is with screw-bearing; 14-sliding panel connecting hole; 15-hole; 20-outermost layer; 21-groove; 22-ball; 23-intermediate layer; The 24-the superiors; 26-needle roller is arranged; 27-installing hole; 28-bolt; 29-2 rubbing surface; 30-3 rubbing surface.
Detailed description of the invention
As illustrated in figs. 1-16, a kind of frictional force variable damper of the present invention, comprise the sliding panel 3 of friction plate 1, lower friction plate 2 and centre, cross section is that the upper and lower friction plate 1,2 of " recessed " font and the sliding panel 3 of centre are pressed on together (pretension bolt 4 and installing hole thereof are see not shown in Fig. 1, Fig. 2-16) by pretension bolt 4.A disk spring 5 is also compressed with between the nut of pretension bolt 4 and upper friction plate 1 or lower friction plate 2.Sliding panel 3 does linear slide (as Suo Shi Fig. 1,11-16) in the space that upper and lower " recessed " font friction plate is formed.Normal pressure between upper and lower friction plate 1,2 and sliding panel 3 contact surface of centre is controlled by the decrement changing disk spring 5.As illustrated in figures 11-16, middle sliding panel 3 one end is provided with some groups of friction blocks 6, often organize upper and lower two friction blocks 6 that friction block 6 comprises sliding panel 3 both sides, flexible member 8 is provided with between friction block 6 and sliding panel 3, under positive pressure, upper and lower friction block 6 all the time with upper and lower friction plate 1,2 close contact.Along the arrangement of sliding panel 3 glide direction, and there is not relative displacement with sliding panel 3 in glide direction in friction block 6.Described sliding panel 3 is with small column 7, is inserted in the hole 15 of friction block 6 correspondence.Sliding panel 3 liang of edge glide directions are provided with band screw-bearing 9.Band screw-bearing 9 can roll along upper and lower friction plate 1,2 both sides bossing inwall, makes sliding panel 3 do linear slide in the space that the upper and lower friction plate 1,2 of " recessed " font is formed.
Wherein, as Figure 1-10 shows, upper and lower friction plate 1,2 is formed by stacking by three layers, is provided with groove 21 in the middle of outermost layer 20, and place ball 22 in groove, ball 22 arranges retainer, and retainer and friction plate skin are fixed.Intermediate layer 23 is one flat plates, is placed on the ball 22 of outermost layer 20, can move relative to outermost layer 20.The face that intermediate layer 23 contacts with ball 22 arranges arc groove, play the guiding role to its motion.The superiors 24 are divided into 5 parts along glide direction, are arranged symmetrically with from centre to both sides, are respectively No. 1 rubbing surface of center, No. 3 rubbing surfaces 30 on No. 2 adjacent rubbing surfaces 29 and both sides.No. 1 rubbing surface arranges the 26 rolling friction faces formed by the needle roller arranged in the rectangle hole in the middle of the superiors 24.The upper and lower contact surface of needle roller row 26 is friction block 6 and intermediate layer 23 respectively, the friction factor of No. 1 rubbing surface, No. 2 rubbing surfaces 29 and No. 3 rubbing surfaces 30 increases successively, wherein, needle roller row 26 is provided with retainer, and retainer and the friction plate the superiors 24 are fixed, the friction factor of No. 1 rubbing surface is 0.005, No. 2 rubbing surfaces 29, its friction factor is selected according to the Hysteresis Behavior of the needs of damper, on most limit is No. 3 rubbing surfaces 30, its friction factor should be large as far as possible, realizes fast braking.Outermost layer 20 and the superiors 24 end bosses fixedly mount in aggregates by bolt 28.
The upper friction plate 1 of frictional force variable damper of the present invention can be connected with building structure, middle slip plate 3 can with TMD(TUNEDMASSDAMPER and tuned mass damper) mass be connected.
Be more than a kind of exemplary embodiment of the present invention, specific embodiment of the invention is not limited thereto.
Claims (7)
1. a frictional force variable damper, comprise the sliding panel (3) of friction plate (1), lower friction plate (2) and centre, cross section in the upper and lower friction plate (1,2) of " recessed " font and the sliding panel (3) of centre be pressed on together by pretension bolt (4); A disk spring (5) is also compressed with between the nut of described pretension bolt (4) and upper friction plate (1) or lower friction plate (2); It is characterized in that: sliding panel (3) one end of described centre is provided with some groups of friction blocks (6), often organize upper and lower two friction blocks (6) that friction block (6) comprises sliding panel (3) both sides, between friction block (6) and sliding panel (3), be provided with flexible member (8); Described sliding panel (3) two edge glide direction is provided with band screw-bearing (9); Described band screw-bearing (9) can be rolled along upper and lower friction plate (1,2) both sides bossing inwall; Described upper and lower friction plate (1,2) is formed by stacking by three layers, is provided with groove (21) in the middle of outermost layer (20), places ball (22) in groove; Intermediate layer (23) is one flat plate, is placed on the ball (22) of outermost layer (20), can be mobile relative to outermost layer (20); The superiors (24) are divided into 5 parts along glide direction, are arranged symmetrically with from centre to both sides, are respectively No. 1 rubbing surface of center, No. 3 rubbing surfaces (30) on No. 2 adjacent rubbing surfaces (29) and both sides; Described No. 1 rubbing surface is the rolling friction face be made up of needle roller row (26) arranged in the rectangle hole in the middle of the superiors (24); The upper and lower contact surface of described needle roller row (26) is friction block (6) and intermediate layer (23) respectively; The friction factor of described No. 1 rubbing surface, No. 2 rubbing surfaces (29) and No. 3 rubbing surfaces (30) increases successively; Described outermost layer (20) and the superiors (24) end bosses fixedly mount in aggregates by bolt (28).
2. a kind of frictional force variable damper according to claim 1, is characterized in that: described friction block (6) along the arrangement of sliding panel (3) glide direction, and relative displacement does not occur with sliding panel (3) in glide direction; Described sliding panel (3) band small column (7), is inserted in hole (15) corresponding to friction block (6).
3. a kind of frictional force variable damper according to claim 2, is characterized in that: the friction factor of described No. 1 rubbing surface is 0.005.
4. a kind of frictional force variable damper according to claim 1, is characterized in that: described ball (22) is provided with retainer, and retainer and friction plate skin (20) are fixed.
5. a kind of frictional force variable damper according to claim 1, is characterized in that: described needle roller row (26) is provided with retainer, and retainer and the friction plate the superiors (24) are fixed.
6. a kind of frictional force variable damper according to claim 1, is characterized in that: the face that described intermediate layer (23) contact with ball (22) arranges arc groove, play the guiding role to the glide direction of intermediate layer (23).
7. a kind of frictional force variable damper according to claim 1, is characterized in that: the upper friction plate (1) of described frictional force variable damper is connected with building structure, and middle slip plate (3) is connected with the mass of TMD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510748260.1A CN105297937B (en) | 2015-11-06 | 2015-11-06 | A kind of frictional force variable damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510748260.1A CN105297937B (en) | 2015-11-06 | 2015-11-06 | A kind of frictional force variable damper |
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| Publication Number | Publication Date |
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| CN105297937A true CN105297937A (en) | 2016-02-03 |
| CN105297937B CN105297937B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510748260.1A Expired - Fee Related CN105297937B (en) | 2015-11-06 | 2015-11-06 | A kind of frictional force variable damper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108457384A (en) * | 2018-01-18 | 2018-08-28 | 同济大学 | A kind of three-dimensional isolation of the adaptive stiffness characteristics of band/shake bearing |
| CN110145053A (en) * | 2017-10-21 | 2019-08-20 | 山东建筑大学 | A kind of energy-dissipating and shock-absorbing wall |
| CN110242090A (en) * | 2019-06-21 | 2019-09-17 | 苏州鼎智瑞光智能科技有限公司 | A kind of Self-resetting shock-absorption damper and assembling constructing method |
| CN114145598A (en) * | 2021-11-17 | 2022-03-08 | 徐州恒远高新技术有限公司 | Self-control element protection type movable display device and using method thereof |
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| CN104088374A (en) * | 2014-06-12 | 2014-10-08 | 清华大学 | Metal composite friction damper |
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| JP2015094463A (en) * | 2013-11-14 | 2015-05-18 | 学校法人君が淵学園 | Vibration damping device |
| CN205206074U (en) * | 2015-11-06 | 2016-05-04 | 湖北文理学院 | But frictional force variable damping ware |
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2015
- 2015-11-06 CN CN201510748260.1A patent/CN105297937B/en not_active Expired - Fee Related
Patent Citations (6)
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| CN201952934U (en) * | 2010-12-20 | 2011-08-31 | 张蓬勃 | Friction damper filled with aluminum plate friction material |
| CN202380601U (en) * | 2011-11-08 | 2012-08-15 | 建研科技股份有限公司 | Variable-friction damper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110145053A (en) * | 2017-10-21 | 2019-08-20 | 山东建筑大学 | A kind of energy-dissipating and shock-absorbing wall |
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| CN108457384A (en) * | 2018-01-18 | 2018-08-28 | 同济大学 | A kind of three-dimensional isolation of the adaptive stiffness characteristics of band/shake bearing |
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| CN114145598A (en) * | 2021-11-17 | 2022-03-08 | 徐州恒远高新技术有限公司 | Self-control element protection type movable display device and using method thereof |
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| CN105297937B (en) | 2017-07-28 |
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