CN102141108B - External electromagnet retractable type magnetorheological damper - Google Patents
External electromagnet retractable type magnetorheological damper Download PDFInfo
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- CN102141108B CN102141108B CN201110057819A CN201110057819A CN102141108B CN 102141108 B CN102141108 B CN 102141108B CN 201110057819 A CN201110057819 A CN 201110057819A CN 201110057819 A CN201110057819 A CN 201110057819A CN 102141108 B CN102141108 B CN 102141108B
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- type piston
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- clutch release
- slave cylinder
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Abstract
The invention discloses an external electromagnet retractable type magnetorheological damper, which comprises a working cylinder, a compensation air bag, a piston, a piston rod, a hollow piston, a hollow piston rod and an electromagnet, wherein the axle centers of the hollow piston and the hollow piston rod are provided with equal-diameter through holes of which the diameters are greater than the outer diameter of the piston; one end of the piston rod and the piston are fixed together and then are arranged in the equal-diameter through holes of the axle centers of the hollow piston and the hollow piston rod; the hollow piston and the hollow piston rod are arranged in the working cylinder; the compensation air bag is positioned at the bottom of the working cylinder; the electromagnet is arranged on the outer circumference of the working cylinder; magnetorheological fluid is fully filled in the working cylinder and the equal-diameter through holes of the hollow piston and the hollow piston rod; a magnet exciting coil is wound on the piston; and the magnitude of damping force output by the external electromagnet retractable type magnetorheological damper can be adjusted only by adjusting and controlling the magnitude of current output to the magnet exciting coil of the piston and the electromagnet by a power supply.
Description
Technical field
The invention belongs to a kind of MR damper, be specifically related to the telescopic MR damper of a kind of external electromagnet.
Background technique
Because the working stroke of common single outstretch pole magnetorheological damper is less than the length of its clutch release slave cylinder; Thereby be difficult to be applicable to working space limited length system or working stroke occasion greater than clutch release slave cylinder; And the working stroke of the telescopic MR damper of external electromagnet of the present invention can be greater than the length of its clutch release slave cylinder; Therefore; The telescopic MR damper of external electromagnet can provide bigger working stroke under the identical situation of clutch release slave cylinder length, makes the telescopic The Applications of Magnetorheological Dampers scope of external electromagnet be able to expansion.
Summary of the invention
The present invention is directed to the common less deficiency of single outstretch pole magnetorheological damper working stroke; A kind of novel MR damper has been proposed; That is: the telescopic MR damper of a kind of external electromagnet; The telescopic MR damper of external electromagnet can provide bigger working stroke under the identical situation of clutch release slave cylinder length, thereby Applicable scope is more extensive.
Technological scheme of the present invention is following:
The telescopic MR damper of a kind of external electromagnet, it comprises clutch release slave cylinder, compensation air bag, piston, piston rod, box type piston, box type piston bar, electromagnet; Clutch release slave cylinder is made up of non-magnet_conductible material, on the box type piston that is made up of permeability magnetic material and the axle center of box type piston bar the isometrical through hole greater than piston external diameter is arranged all, and an end of box type piston and an end of box type piston bar are fixed; One end of piston rod fixedly is placed in the isometrical through hole in box type piston and box type piston bar axle center with the piston that is made up of permeability magnetic material; Seal arrangement and the bearing of the other end of piston rod through the box type piston rod end surface stretches out from the other end of box type piston bar; On piston, be wound with field coil; Box type piston and box type piston bar place in the clutch release slave cylinder; Seal arrangement and the bearing of box type piston bar through the clutch release slave cylinder end face stretches out from an end of clutch release slave cylinder; The compensation air bag is positioned at the clutch release slave cylinder bottom, and electromagnet is installed on the excircle of clutch release slave cylinder, in the isometrical through hole of clutch release slave cylinder and box type piston and box type piston bar, all has been full of magnetic flow liquid; The external diameter of piston is less than the internal diameter of the isometrical through hole on box type piston and the box type piston bar axle center and leave the magnetic flow liquid gap of flowing, and the external diameter of box type piston is less than the internal diameter of clutch release slave cylinder and leave the magnetic flow liquid gap of flowing.At piston rod and box type piston bar end a location ring washer is arranged respectively; The external diameter of the location ring washer of piston-rod end is greater than the seal arrangement of box type piston rod end surface and the external diameter of bearing, and the external diameter of the location ring washer that the box type piston bar is terminal is greater than the seal arrangement of clutch release slave cylinder end face and the external diameter of bearing.The telescopic MR damper of external electromagnet has two working strokes; First working stroke is: piston rod promotes in the isometrical through hole of piston entering (or withdrawing from) box type piston and box type piston bar, and second working stroke is: piston rod promotes box type piston and the box type piston bar gets in (or withdrawing from) clutch release slave cylinder; In these two working strokes, because of in the isometrical through hole of piston rod turnover box type piston and box type piston bar and the volume-variation in the clutch release slave cylinder that causes in the box type piston bar turnover clutch release slave cylinder compensate by compensating air bag.
Function of the present invention is achieved in that when piston rod promotes in the isometrical through hole that piston gets into box type piston and box type piston bar; That is: in first working stroke; A part of magnetic flow liquid in the isometrical through hole of box type piston and box type piston bar is through the Clearance Flow between piston external diameter and box type piston and the isometrical through hole internal diameter of box type piston bar; Another part magnetic flow liquid in the isometrical through hole of box type piston and box type piston bar then receives the extruding that the entering because of piston rod reduces box type piston and box type piston bar internal volume and flows to clutch release slave cylinder; Because the isometrical through hole of box type piston and box type piston bar communicates with clutch release slave cylinder; Therefore, the compensation air bag that is positioned at the clutch release slave cylinder bottom will be compressed, with the volume-variation in the isometrical through hole of compensation box type piston and box type piston bar; In the isometrical through hole of piston rod continuation promotion piston entering box type piston and box type piston bar and after arriving the location ring washer of piston-rod end; Box type piston and box type piston bar begin to get into clutch release slave cylinder under the promotion of location ring washer on the piston rod; That is: in second working stroke; A part of magnetic flow liquid in the clutch release slave cylinder is through the Clearance Flow between box type piston external diameter and the clutch release slave cylinder internal diameter; Another part magnetic flow liquid in the clutch release slave cylinder then receives the extruding that the entering because of the box type piston bar reduces the clutch release slave cylinder internal volume, continues compression compensation air bag and gets into the volume-variation in the clutch release slave cylinder with compensation box type piston bar.
When piston field coil and electromagnet no electric circuit; There is not magnetic field in the clutch release slave cylinder and in the gap between piston external diameter and box type piston and the isometrical through hole internal diameter of box type piston bar; Thereby in the clutch release slave cylinder and the viscosity of magnetic flow liquid in the gap between box type piston and the isometrical through hole internal diameter of box type piston bar lower, piston rod promote in the isometrical through hole that piston gets into box type piston and box type piston bar and the damping force that receives in piston rod promotion box type piston and the box type piston bar entering clutch release slave cylinder less; After piston field coil and electromagnet energising; Make in the clutch release slave cylinder and piston external diameter and box type piston and the isometrical through hole internal diameter of box type piston bar between the gap in magnetic intensity higher; Make the viscosity of the magnetic flow liquid in the gap between the isometrical through hole internal diameter of clutch release slave cylinder and box type piston and box type piston bar higher; Make piston rod promote in the isometrical through hole that piston gets into box type piston and box type piston bar and damping force that piston rod promotes to receive in box type piston and the box type piston bar entering clutch release slave cylinder bigger; Through the size of current in adjustment input piston field coil and the electromagnet, make the damping force of the telescopic MR damper output of external electromagnet obtain adjustment.Therefore, compare,, and make the Applicable scope of MR damper more extensive because of the telescopic MR damper of external electromagnet can provide bigger working stroke under the identical situation of clutch release slave cylinder length with common single outstretch pole magnetorheological damper.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention, and dotted line is the direction in the magnetic field of electromagnet generation among the figure.
Fig. 2 is the cut-away view of Fig. 1.
Fig. 3 is a work schematic representation of the present invention, also is the schematic representation of first working stroke of the present invention.
Fig. 4 is the schematic representation of second working stroke of the present invention.
Embodiment
Specify structure of the present invention below in conjunction with accompanying drawing:
Referring to Fig. 1 and Fig. 2, this is a kind of concrete structure of the present invention, and it comprises the clutch release slave cylinder 3 that is made up of non-magnet_conductible material, compensation air bag 1, constitutes piston 13 and piston rod 14, box type piston 8 and box type piston bar 15 by permeability magnetic material; On the axle center of box type piston 8 and box type piston bar 15 the isometrical through hole 7 greater than piston 13 external diameters is arranged all, an end of box type piston 8 and an end of box type piston bar 15 are fixed; One end of piston rod 14 and piston 13 fixedly are placed in the isometrical through hole 7 in box type piston 8 and box type piston bar 15 axle center; The other end of piston rod 14 stretches out with the other end of bearing 20 from box type piston bar 15 through the seal arrangement 19 of box type piston bar 15 end faces; Box type piston 8 is placed in the clutch release slave cylinder 3 with box type piston bar 15; Box type piston bar 15 stretches out with the end of bearing 10 from clutch release slave cylinder 3 through the seal arrangement 9 of clutch release slave cylinder 3 end faces; Compensation air bag 1 is positioned at clutch release slave cylinder 3 bottoms; Electromagnet 6 is installed on the excircle of clutch release slave cylinder 3, has injected pressurized air 2 in compensation in the air bag 1, in the isometrical through hole 7 of box type piston 8 and box type piston bar 15 and clutch release slave cylinder 3, all has been full of magnetic flow liquid 4; The external diameter of piston 13 is less than the internal diameter of the isometrical through hole 7 on box type piston 8 and box type piston bar 15 axle center and leave the magnetic flow liquid gap 12 of flowing; On piston 13, be wound with field coil 11, the lighting outlet 22 of field coil 11 is drawn through piston rod 14 center holes 16, and the external diameter of box type piston 8 is less than the internal diameter of clutch release slave cylinder 3 and leave the magnetic flow liquid gap 5 of flowing.
Piston rod 14 respectively has a location ring washer 21 and location ring washer 17 with box type piston bar 15 ends; The external diameter of the location ring washer 21 of piston rod 14 ends is greater than the seal arrangement 19 of box type piston bar 15 end faces and the external diameter of bearing 20, and the external diameter of the location ring washer 17 of box type piston bar 15 ends is greater than the seal arrangement 9 of clutch release slave cylinder 3 end faces and the external diameter of bearing 10.
Referring to Fig. 3; When piston rod 14 promotes in the isometrical through hole 7 that pistons 13 get into box type pistons 8 and box type piston bar 15; The telescopic MR damper of external electromagnet begins to get into first working stroke; Make a part of magnetic flow liquid 4 in the isometrical through hole 7 of box type piston 8 and box type piston bar 15, flow, another part magnetic flow liquid 4 that the isometrical through hole of box type piston 8 and box type piston bar 15 7 is interior through the gap between isometrical through hole 7 internal diameters of piston 13 external diameters and box type piston 8 and box type piston bar 15 12; Then receive entering because of piston rod 14; Make the extruding that isometrical through hole 7 internal volumes of box type piston 8 and box type piston bar 15 reduce and flow in the clutch release slave cylinder 3, because the isometrical through hole 7 of box type piston 8 and box type piston bar 15 communicates with clutch release slave cylinder 3, therefore; The compensation air bag 1 that is positioned at clutch release slave cylinder 3 bottoms will be compressed, with the volume-variation in the isometrical through hole 7 of compensation box type piston 8 and box type piston bar 15; When continuing to promote piston 13, piston rod 14 gets in the isometrical through hole 7 of box type piston 8 and box type piston bar 15; Behind the location ring washers that receive stopper rod 14 ends 21 resistance shelves; The telescopic MR damper of external electromagnet begins to get into second working stroke; Referring to Fig. 4; Box type piston 8 begins to get into clutch release slave cylinder 3 with box type piston bar 15 under the promotion of location ring washer 21 on the piston rod 14; A part of magnetic flow liquids 4 in the clutch release slave cylinder 3 flow through box type piston 8 external diameters and the gap 5 between clutch release slave cylinder 3 internal diameters, and 4 of another part magnetic flow liquids in the clutch release slave cylinder 3 receive the extruding that the entering because of box type piston bar 15 reduces clutch release slave cylinder 3 internal volumes, continue compression compensation air bag 1 and get into the interior volume-variation of clutch release slave cylinders 3 with compensation box type piston bar 15.
When control power supply 24 not during output current; When the field coil 11 of piston 13 and electromagnet 6 no electric circuits; There is not magnetic field in the gap 12 between box type piston 8 external diameters and clutch release slave cylinder 3 internal diameters between gap 5 and piston 13 external diameters and box type piston 8 and box type piston bar 15 isometrical through hole 7 internal diameters; Thereby the viscosity of the magnetic flow liquid 4 in gap 5 and the gap 12 is lower, and piston rod 14 promotes in the isometrical through hole 7 that pistons 13 get into box type pistons 8 and box type piston bar 15 and piston rod 14 promotes box type pistons 8 and box type piston bar 15 to get into the damping force that receives in the clutch release slave cylinders 3 less; When control power supply 24 output currents; After the field coil 11 of piston 13 is switched on electromagnet 6; Make the magnetic intensity in the gap 12 between gap 5 between box type piston 8 external diameters and clutch release slave cylinder 3 internal diameters and piston 13 external diameters and box type piston 8 and box type piston bar 15 isometrical through hole 7 internal diameters higher; Make gap 5 higher with the viscosity of gap 12 interior magnetic flow liquids 4; Make piston rod 14 promote in the isometrical through hole 7 that pistons 13 get into box type pistons 8 and box type piston bar 15 and piston rod 14 promotes box type pistons 8 and box type piston bar 15 to get into the damping force that receives in the clutch release slave cylinders 3 bigger, thereby make the damping force of the telescopic MR damper output of external electromagnet obtain changing.Therefore, as long as adjustment control power supply 24 outputs to the field coil 11 of piston 13 and the size of current in the electromagnet 6, can adjust the size of the damping force of the telescopic MR damper output of external electromagnet.
In piston rod 14 pulling pistons 13 withdraw from the isometrical through hole 7 of box type piston 8 and box type piston bar 15 and piston rod 14 pulling box type pistons 8 and box type piston bar 15 situation when deactivating in the cylinder 3 then in contrast, repeat no more here.
Claims (2)
1. telescopic MR damper of external electromagnet; It comprises clutch release slave cylinder, compensation air bag, piston, piston rod, box type piston, box type piston bar and electromagnet; It is characterized in that: clutch release slave cylinder is made up of non-magnet_conductible material; On the box type piston that constitutes by permeability magnetic material and the axle center of box type piston bar the isometrical through hole greater than piston external diameter is arranged all; One end of box type piston and an end of box type piston bar are fixed, and an end of piston rod and the piston that is made up of permeability magnetic material fixedly are placed in the isometrical through hole in box type piston and box type piston bar axle center, and seal arrangement and the bearing of the other end of piston rod through the box type piston rod end surface stretches out from the other end of box type piston bar; On piston, be wound with field coil; Box type piston and box type piston bar place in the clutch release slave cylinder, and seal arrangement and the bearing of box type piston bar through the clutch release slave cylinder end face stretches out from an end of clutch release slave cylinder, and the compensation air bag is positioned at the clutch release slave cylinder bottom; Electromagnet is installed on the excircle of clutch release slave cylinder, in the isometrical through hole of clutch release slave cylinder and box type piston and box type piston bar, all has been full of magnetic flow liquid; The external diameter of said piston is less than the internal diameter of the isometrical through hole on box type piston and the box type piston bar axle center and leave the magnetic flow liquid gap of flowing, and the external diameter of box type piston is less than the internal diameter of clutch release slave cylinder and leave the magnetic flow liquid gap of flowing.
2. the telescopic MR damper of a kind of external electromagnet as claimed in claim 1; It is characterized in that: said piston rod and box type piston bar end respectively have a positioning retainer ring; The external diameter of the positioning retainer ring of piston-rod end is greater than the seal arrangement of box type piston rod end surface and the external diameter of bearing, and the external diameter of the positioning retainer ring that the box type piston bar is terminal is greater than the seal arrangement of clutch release slave cylinder end face and the external diameter of bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110057819A CN102141108B (en) | 2011-03-11 | 2011-03-11 | External electromagnet retractable type magnetorheological damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110057819A CN102141108B (en) | 2011-03-11 | 2011-03-11 | External electromagnet retractable type magnetorheological damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102141108A CN102141108A (en) | 2011-08-03 |
| CN102141108B true CN102141108B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110057819A Expired - Fee Related CN102141108B (en) | 2011-03-11 | 2011-03-11 | External electromagnet retractable type magnetorheological damper |
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| CN (1) | CN102141108B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062277A (en) * | 2013-01-18 | 2013-04-24 | 浙大新剑（上海）智能技术有限公司 | Air-bag-compensating split type magneto-rheological fluid seat damping damper |
| CN105179567A (en) * | 2015-07-19 | 2015-12-23 | 常州大学 | Single-rod variable-cylinder-body active single-control variable-damping magnetorheological damper |
| CN105156560A (en) * | 2015-07-20 | 2015-12-16 | 常州大学 | Double-rod variable-orifice passive double-control variable-damping magnetorheological damper |
| CN105065555A (en) * | 2015-07-20 | 2015-11-18 | 常州大学 | Single-rod multistage diffraction active double-control variable damping magneto-rheological damper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6497309B1 (en) * | 2001-08-13 | 2002-12-24 | Delphi Technologies, Inc. | Magneto-rheological damper with an external coil |
| CN2551806Y (en) * | 2002-06-26 | 2003-05-21 | 重庆大学 | Magnetic rheological liquid vibration-damper for automobile |
| CN2934746Y (en) * | 2006-06-08 | 2007-08-15 | 武汉理工大学 | Multiple-mode magnetic rheologic liquid damper |
| CN101725659A (en) * | 2009-12-15 | 2010-06-09 | 谭和平 | External electromagnet magnetorheological damper |
| CN201953897U (en) * | 2011-03-11 | 2011-08-31 | 王靖 | External electromagnetic telescopic magnetorheological damper |
-
2011
- 2011-03-11 CN CN201110057819A patent/CN102141108B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6497309B1 (en) * | 2001-08-13 | 2002-12-24 | Delphi Technologies, Inc. | Magneto-rheological damper with an external coil |
| CN2551806Y (en) * | 2002-06-26 | 2003-05-21 | 重庆大学 | Magnetic rheological liquid vibration-damper for automobile |
| CN2934746Y (en) * | 2006-06-08 | 2007-08-15 | 武汉理工大学 | Multiple-mode magnetic rheologic liquid damper |
| CN101725659A (en) * | 2009-12-15 | 2010-06-09 | 谭和平 | External electromagnet magnetorheological damper |
| CN201953897U (en) * | 2011-03-11 | 2011-08-31 | 王靖 | External electromagnetic telescopic magnetorheological damper |
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| CN102141108A (en) | 2011-08-03 |
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Granted publication date: 20120905 Termination date: 20140311 |