CN104864026A - Compound electromagnetic friction damper - Google Patents
Compound electromagnetic friction damper Download PDFInfo
- Publication number
- CN104864026A CN104864026A CN201510175207.7A CN201510175207A CN104864026A CN 104864026 A CN104864026 A CN 104864026A CN 201510175207 A CN201510175207 A CN 201510175207A CN 104864026 A CN104864026 A CN 104864026A
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- Prior art keywords
- friction plate
- electromagnet
- friction
- frcition damper
- type electromagnetic
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Classifications
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- 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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to a compound electromagnetic friction damper. The friction damper comprises an electromagnet, a friction plate, disc springs, friction force adjusting bolts, extrusion cone rings, a circular outer cylinder, a stop catch cylinder, a sliding shaft, a controller, a sensor, end cover plates, fixing nuts and inserted pin connecting parts, wherein the friction plate is arranged on the inner side of the circular outer cylinder and consists of a plurality of arc-shaped plates formed by dividing a cylinder by through seams in the axial direction; the two end parts of the arc-shaped plates are oblique sections with a certain gradient in the axial direction; the extrusion cone rings and the disc springs, which are the same as the friction plate in gradient, are arranged on two sides of the end part of the friction plate; the friction force adjusting bolts on the outermost side are connected with the end cover plates through threads. When the electromagnet is electrified, a corresponding electromagnetic attraction force is generated between the electromagnet and the friction plate according to the sliding displacement, so that variable friction can be realized; meanwhile, the pressure between the friction plate and the electromagnet can be changed to change the sliding force intensity of the damper.
Description
Technical field
The present invention relates to structural engineering field, particularly relate to a kind of compound frcition damper combined with conventional friction by electromagnet-friction, be arranged in engineering structure and resist the dynamic action such as high wind, earthquake.
Background technique
In order to alleviate the vibratory response of structure and equipment, can arrange in structure and equipment that energy-consumption shock-absorption device is to consume the energy of Seismic input, to alleviate the harm vibrated and bring to structure and equipment.The energy-consumption shock-absorption device kind of current research and development is more, can be divided into lower class: viscoelastic damper, viscous damper, metal damper and frcition damper by the difference of its Energy Dissipation Mechanism.
Frcition damper is a kind of a kind of energy-consumption shock-absorption device utilizing the friction energy-dissipating of rubbing surface to consume vibrational energy, and because its energy dissipation capacity is strong, load, frequency are little to its performance impact, and simple structure, draw materials easily, cheap, thus there is good application prospect.The research of frcition damper starts from late 1970s, and subsequently for adapting to dissimilar building structure, Chinese scholars have developed multiple frcition damper successively.The major defect of general conventional friction damper is that the size of damper precompression in sliding process can not change automatically, thus its frictional force provided also remains unchanged usually, the hysteresis loop of damper is close to rectangle, this type of frcition damper cannot change the size of frictional force in real time according to the size of structural vibration load action intensity, to such an extent as to frcition damper slides too early or does not slide, make can not slide under weak shock effect according to the damper designed under severe earthquake action, and under severe earthquake action, do not reach desirable effectiveness in vibration suppression by because of exerting oneself too small according to the damper designed under weak shock effect.
Summary of the invention
Technical problem to be solved by this invention is: provide the compound type electromagnetic frcition damper that a kind of electromagnet-friction combines with conventional friction, the size of sliding power the frictional force that this damper is provided by conventional friction part controls damper, crosses getting up early to prevent frcition damper and slides or do not play cunning; Become friction portion to be provided with change in displacement by electromagnet and strain frictional force mutually, to meet the requirement that structure damper when large deformation exports large frictional force.
The present invention solves its technical problem and adopts following technological scheme:
The present invention is to provide the composite friction damper that a kind of conventional friction combines with electromagnet-friction, this frcition damper includes electromagnet, friction plate, butterfly spring, frictional force adjustment bolt, extruding conical ring, circle urceolus, backstop cylinder, sliding bar, controller, sensor, end casing, set screw nut and plug connections, wherein
Described electromagnet and friction plate form closed magnetic loop;
Described electromagnet is made up of magnet case and coil winding;
Described friction plate be by cylinder by the polylith arc plate of straight joint even partition in the axial direction, be provided with the straight joint that interval is identical between the longitudinal cross-section of adjacent arc plate; Outside cross section vertically, arc plate two ends is the oblique section with several angle, and its internal diameter is identical with magnet case external diameter, and external diameter is identical with circle urceolus internal diameter; Further, the internal surface of friction plate and the exterior surface of magnet case;
Described friction plate two end part arrange extruding conical ring, and extruding conical ring is ring-type cone, and the gradient of its intrados is identical with the gradient of the oblique section at friction plate two end part, and intrados contacts with oblique section, friction plate two end part;
Described frictional force adjustment bolt is connected with end casing by screw thread;
Between the outside of described extruding conical ring and the inner side of circle urceolus, be provided with backstop cylinder, its external diameter is identical with the internal diameter of circle urceolus; Its two ends contact with friction plate with end casing respectively.
Further, be respectively arranged with end casing, the centre of end casing is provided with end cap tapped hole at the two ends of described round urceolus, frictional force adjustment bolt is connected with end casing by the screw thread on end casing; Described sliding axle is through the frictional force adjustment bolt of side.
Further, described extruding conical ring is greater than the side away from electromagnet at the internal diameter of the side near electromagnet, and described crush cones ring set is connected on outside the oblique section at friction plate two end part.
Further, described belleville spring is arranged between frictional force adjustment bolt and extruding conical ring, in order to add the oblique section at extruding force and extrusion friction plate two ends to crush cones circulating application, makes to produce pressure between friction plate and magnet case.
Further, two described side controllers are connected with coil winding with sensor respectively by datawire.
Further, described electromagnet set screw nut is fixed on sliding axle, and the intermediate portion of magnet case arranges through hole, sliding axle is through this through hole, further, the sliding axle at the two ends of magnet case arranges set screw nut respectively, slip the tip of the axis is provided with plug connections.
Further, arrange shoulder respectively prominent at the two ends of described friction plate, the outside prominent at shoulder is described oblique section.
Further, described electromagnet is that the magnet case of I shape and coil form by axial cross section.
Further, described magnet case, friction plate are made up of permeability magnetic material, and circle urceolus adopts non-magnet_conductible material to make.
Further, described controller comprises displacement, acceleration collecting unit, and it converts the electrical signal of sensor to digital signal; Embedded draught control unit, it controls damping force size according to control algorithm; Over-voltage over-current protection unit, it is protected whole controller; PWM constant-current power amplifying unit; Above-mentioned four unit are interconnected with electrical signal successively.The present invention has following major advantage:
One. this damper increases electromagnet-friction part on the basis of conventional friction damper, enables damper carry out feedback control, effectively improves damper energy dissipation capacity.
Even if they are two years old. this damper, under powering-off state, still can utilize conventional friction part to carry out friction energy-dissipating, adds reliability during damper work.
They are three years old. and this damper is in installation process, and engineer according to the needs of Practical Project, by a sliding power of regulating friction force adjustment bolt damping adjusting device, can add the flexibility that damper uses.
Accompanying drawing explanation
Fig. 1 is the structural representation of composite friction damper of the present invention.
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is the B-B sectional drawing of Fig. 1;
Fig. 4 is magnet case front elevation view and side elevational view;
Fig. 5 is extruding circular cone ring front elevation view and side elevational view.
In figure: 1-1. magnet case; 1-2. coil winding; 2. friction plate; 3. butterfly spring; 4. frictional force adjustment bolt; 5. extrude conical ring; 6. justify urceolus; 7. backstop cylinder; 8. sliding axle; 9. controller; 10. sensor; 11. end casings; 12. set screw nut 13. plug connections; 14. straight joints.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but do not limit the present invention.
Compound type electromagnetic frcition damper provided by the invention, its structure as shown in Figure 1 to Figure 3: comprise electromagnet, friction plate 2, butterfly spring 3, frictional force adjustment bolt 4, extruding conical ring 5, circle urceolus 6, backstop cylinder 7, sliding axle 8, controller 9, sensor 10, end casing 11, fixing bolt 12, plug connections 13.
Wherein: electromagnet is made up of magnet case 1-1 (as Fig. 4) and coil winding 1-2, described electromagnet set screw nut 12 is fixed on sliding axle 8, in the present embodiment, the intermediate portion of magnet case 1-1 arranges through hole, sliding axle 8 is through this through hole, further, the sliding axle 8 at the two ends of magnet case 1-1 arranges set screw nut 12 respectively, the end of sliding axle 8 is provided with plug connections 13.Described electromagnet is that the magnet case of I shape and coil form by axial cross section.
Described friction plate 2 be by cylinder by the polylith arc plate of straight joint 14 even partition in the axial direction, be provided with the identical straight joint in interval 14 between the longitudinal cross-section of adjacent arc plate; Outside cross section vertically, arc plate two ends is the oblique section with several angle, and its internal diameter is identical with magnet case 1-1 external diameter, and external diameter is identical as shown in Figure 1 to Figure 3 with circle urceolus 6 internal diameter; Further, the internal surface of friction plate 2 and the exterior surface of magnet case 1-1.Arrange shoulder respectively at the two ends of described friction plate 2 prominent, the outside prominent at shoulder is described oblique section.
Electromagnet and friction plate 2 define complete closed magnetic loop, provide magnetic energy to input by coil winding 1-2, change the induction level in magnetic loop by the electric current changed in coil.
Be respectively arranged with end casing 11 at the two ends of circle urceolus 6, the centre of end casing 11 is provided with end cap tapped hole, frictional force adjustment bolt 4 is connected with end casing 11 by the screw thread on end casing 11.Described sliding axle 8 is through the frictional force adjustment bolt 4 of side.
In this enforcement, extruding conical ring 5 is ring-type cone (as shown in Figure 5), the gradient of its intrados is identical with the gradient of the oblique section at friction plate two end part, and intrados contacts with oblique section, friction plate two end part, extruding conical ring 5 is greater than the side away from electromagnet at the internal diameter of the side near electromagnet, therefore, described extruding conical ring 5 is socketed in outside the oblique section at friction plate two end part.
Between the outside of described extruding conical ring 5 and the inner side of circle urceolus 6, be provided with backstop cylinder 7, its external diameter is identical with the internal diameter of circle urceolus; Its two ends contact with friction plate 2 with end casing 11 respectively.
Described belleville spring 3 is arranged between frictional force adjustment bolt 4 and extruding conical ring 5, in order to apply the oblique section at extruding force and extrusion friction plate 2 two ends to extruding conical ring 5, make to produce pressure between friction plate 2 and magnet case 1-1, thus make damper produce frictional force.
In the present embodiment, two side controllers 9 are connected with coil winding 1-2 with sensor 10 respectively by datawire.
Described magnet case 1-1, friction plate 2 can be made up of permeability magnetic material (silicon steel, magnetic alloy, low carbon steel), and circle urceolus 6 adopts non-magnet_conductible material (copper, stainless steel) to make, and other components do not do specific requirement.The sectional dimension of magnet case and the thickness of friction plate all should utilize Finite Element Magnetic Field Analysis to draw the physical dimension of optimization, make to reach maximum by the magnetic induction intensity of magnetic loop.
Described controller 9 can be made up of the following units: displacement, acceleration collecting unit, and it can convert the electrical signal of sensor to digital signal; Embedded draught control unit, it can control damping force size according to control algorithm; Over-voltage over-current protection unit, it can be protected whole controller; PWM constant-current power amplifying unit, it can ensure the stability of controller.These four unit are interconnected with electrical signal successively.
The effect of described sensor 10 is exactly the vibratory response gathering external structure, and this sensor can adopt conventional sensors, such as displacement transducer, velocity transducer, acceleration transducer, optical sensor etc.
The working procedure of brief description damper of the present invention.
In only alive situation, the Vibration Condition of perceptual structure under outside dynamic action is carried out by sensor 10, dynamic response signal is inputed to controller 9 by sensor 10, controller 9 can send control signal to change the electric current in coil winding 1-2 according to corresponding control strategy, thus changes the magnetic induction intensity of magnet case 1-1 and friction plate 2.Like this, the electromagnetic attraction at magnet case 1-1 and friction plate 2 surface of contact place changes thereupon, thus the frictional force of damper can be controlled.
When at obstructed electric current being only frictional force adjustment bolt 4 at damping adjusting device two ends, extruding conical ring 5 is because of the oblique section of the power and extrusion friction plate 2 two ends that are subject to butterfly spring 3, make to produce pressure between friction plate 2 and magnet case 1-1, thus make damper produce frictional force.
The while of alive in coil winding 1-2, artificer also can according to concrete engineering needs, and the frictional force adjustment bolt 4 at damping adjusting device two ends changes a sliding power of damper, makes electromagnet-friction and conventional friction co-operation.In the case, even power-off, damper still can carry out friction energy-dissipating under the frictional force of artificer's setting, adds the reliability of damper work.
Claims (10)
1. compound type electromagnetic-frcition damper, it is characterized in that, its compound frcition damper combined with conventional friction for a kind of electromagnet-friction, this frcition damper includes electromagnet, friction plate, butterfly spring, frictional force adjustment bolt, extruding conical ring, circle urceolus, backstop cylinder, sliding bar, controller, sensor, end casing, set screw nut and plug connections, wherein
Described electromagnet and friction plate form closed magnetic loop;
Described electromagnet is made up of magnet case and coil winding;
Described friction plate be by cylinder by the polylith arc plate of straight joint even partition in the axial direction, be provided with the straight joint that interval is identical between the longitudinal cross-section of adjacent arc plate; Outside cross section vertically, arc plate two ends is the oblique section with several angle, and its internal diameter is identical with magnet case external diameter, and external diameter is identical with circle urceolus internal diameter; Further, the internal surface of friction plate and the exterior surface of magnet case;
Described friction plate two end part arrange extruding conical ring, and extruding conical ring is ring-type cone, and the gradient of its intrados is identical with the gradient of the oblique section at friction plate two end part, and intrados contacts with oblique section, friction plate two end part;
Described frictional force adjustment bolt is connected with end casing by screw thread;
Between the outside of described extruding conical ring and the inner side of circle urceolus, be provided with backstop cylinder, its external diameter is identical with the internal diameter of circle urceolus; Its two ends contact with friction plate with end casing respectively.
2. compound type electromagnetic-frcition damper according to claim 1, it is characterized in that, be respectively arranged with end casing at the two ends of described round urceolus, the centre of end casing is provided with end cap tapped hole, frictional force adjustment bolt is connected with end casing by the screw thread on end casing; Described sliding axle is through the frictional force adjustment bolt of side.
3. compound type electromagnetic-frcition damper according to claim 2, is characterized in that, described extruding conical ring is greater than the side away from electromagnet at the internal diameter of the side near electromagnet, and described crush cones ring set is connected on outside the oblique section at friction plate two end part.
4. compound type electromagnetic-frcition damper according to claim 2, it is characterized in that, described belleville spring is arranged between frictional force adjustment bolt and extruding conical ring, in order to add the oblique section at extruding force and extrusion friction plate two ends to crush cones circulating application, make to produce pressure between friction plate and magnet case.
5. compound type electromagnetic-frcition damper according to claim 4, is characterized in that, two described side controllers are connected with coil winding with sensor respectively by datawire.
6. compound type electromagnetic-frcition damper according to claim 4, it is characterized in that, described electromagnet set screw nut is fixed on sliding axle, the intermediate portion of magnet case arranges through hole, sliding axle is through this through hole, further, the sliding axle at the two ends of magnet case arranges set screw nut respectively, slip the tip of the axis is provided with plug connections.
7. compound type electromagnetic-frcition damper according to claim 4, is characterized in that, arranges shoulder respectively prominent at the two ends of described friction plate, and the outside prominent at shoulder is described oblique section.
8. compound type electromagnetic-frcition damper according to claim 4, is characterized in that, described electromagnet is that the magnet case of I shape and coil form by axial cross section.
9. compound type electromagnetic-frcition damper according to claim 4, is characterized in that, described magnet case, friction plate are made up of permeability magnetic material, and circle urceolus adopts non-magnet_conductible material to make.
10. compound type electromagnetic-frcition damper according to claim 4, is characterized in that, described controller comprises displacement, acceleration collecting unit, and it converts the electrical signal of sensor to digital signal; Embedded draught control unit, it controls damping force size according to control algorithm; Over-voltage over-current protection unit, it is protected whole controller; PWM constant-current power amplifying unit; Above-mentioned four unit are interconnected with electrical signal successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175207.7A CN104864026B (en) | 2015-04-15 | 2015-04-15 | Compound type electromagnetic frcition damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175207.7A CN104864026B (en) | 2015-04-15 | 2015-04-15 | Compound type electromagnetic frcition damper |
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| Publication Number | Publication Date |
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| CN104864026A true CN104864026A (en) | 2015-08-26 |
| CN104864026B CN104864026B (en) | 2017-06-20 |
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| CN201510175207.7A Expired - Fee Related CN104864026B (en) | 2015-04-15 | 2015-04-15 | Compound type electromagnetic frcition damper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465270A (en) * | 2015-12-28 | 2016-04-06 | 东北大学 | Frictional electromagnetic compound damping intelligent vibration isolator system and vibration testing method |
| CN108930133A (en) * | 2017-05-24 | 2018-12-04 | 青岛海尔洗衣机有限公司 | Use in washing machine hanger rod component and rotary drum washing machine |
| CN110056591A (en) * | 2019-04-25 | 2019-07-26 | 武汉理工大学 | A kind of linear displacement becomes friction and electromagnetism variation rigidity composite damper |
| CN110195763A (en) * | 2018-02-25 | 2019-09-03 | 劳漠雨 | A kind of car electromagnetic damper |
| CN113237627A (en) * | 2021-06-08 | 2021-08-10 | 沈阳工业大学 | Double-wave impact amplifier |
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| CN1420969A (en) * | 2000-03-29 | 2003-05-28 | 洛德公司 | Magnetically controlled friction damper |
| CN101216088A (en) * | 2008-01-18 | 2008-07-09 | 北京工业大学 | Barrel-type friction-changing damper |
| CN101435477A (en) * | 2007-11-14 | 2009-05-20 | 黄潭城 | Damping structure |
| CN103291797A (en) * | 2013-03-15 | 2013-09-11 | 尹学军 | Friction damper |
| CN104482108A (en) * | 2014-12-05 | 2015-04-01 | 国家电网公司 | Centering friction damper special for column-type electrical equipment |
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2015
- 2015-04-15 CN CN201510175207.7A patent/CN104864026B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3796288A (en) * | 1972-10-10 | 1974-03-12 | H Hollnagel | One or two way energy (shock) absorber |
| DE3041937A1 (en) * | 1980-11-06 | 1982-05-27 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | TUBULAR FRICTION SHOCK ABSORBER |
| CN1420969A (en) * | 2000-03-29 | 2003-05-28 | 洛德公司 | Magnetically controlled friction damper |
| CN101435477A (en) * | 2007-11-14 | 2009-05-20 | 黄潭城 | Damping structure |
| CN101216088A (en) * | 2008-01-18 | 2008-07-09 | 北京工业大学 | Barrel-type friction-changing damper |
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| CN104482108A (en) * | 2014-12-05 | 2015-04-01 | 国家电网公司 | Centering friction damper special for column-type electrical equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465270A (en) * | 2015-12-28 | 2016-04-06 | 东北大学 | Frictional electromagnetic compound damping intelligent vibration isolator system and vibration testing method |
| CN105465270B (en) * | 2015-12-28 | 2017-06-30 | 东北大学 | One kind friction Electromagnetic heating damping intelligent vibration isolator system and method for testing vibration |
| CN108930133A (en) * | 2017-05-24 | 2018-12-04 | 青岛海尔洗衣机有限公司 | Use in washing machine hanger rod component and rotary drum washing machine |
| CN110195763A (en) * | 2018-02-25 | 2019-09-03 | 劳漠雨 | A kind of car electromagnetic damper |
| CN110056591A (en) * | 2019-04-25 | 2019-07-26 | 武汉理工大学 | A kind of linear displacement becomes friction and electromagnetism variation rigidity composite damper |
| CN113237627A (en) * | 2021-06-08 | 2021-08-10 | 沈阳工业大学 | Double-wave impact amplifier |
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| CN104864026B (en) | 2017-06-20 |
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