CN101749358A - Damping force adjustable permanent magnet type magnetic current variable damper - Google Patents
Damping force adjustable permanent magnet type magnetic current variable damper Download PDFInfo
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- CN101749358A CN101749358A CN201010112663A CN201010112663A CN101749358A CN 101749358 A CN101749358 A CN 101749358A CN 201010112663 A CN201010112663 A CN 201010112663A CN 201010112663 A CN201010112663 A CN 201010112663A CN 101749358 A CN101749358 A CN 101749358A
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Abstract
The invention discloses a damping force adjustable permanent magnet type magnetic current variable damper. The damper comprises a working cylinder, a piston, two piston rods, a built-in magnetic field generator and a position adjusting mechanism for the built-in magnetic field generator. The piston and one piston rod are both provided with a central through hole having a same diameter; the built-in magnetic field generator and the position adjusting mechanism for the built-in magnetic field generator are arranged in the piston and the piston rod which are provided with the central through hole; after a round high magnetic permeability metallic material is lapped with a round non-magnetic permeability metallic material which has a thickness as same as the high magnetic permeability metallic material, the piston is spliced, riveted or embedded into a non-magnetic permeability metallic tube so as to integrate together; and after a round high magnetic permeability metallic material is lapped with a round permanent magnet material which has a thickness as same as the high magnetic permeability metallic material, the built-in magnetic field generator is spliced, riveted or embedded into the non-magnetic permeability metallic tube so as to integrate together. The distance from the built-in magnetic field generator to a piston bottom hole can regulate the output damping force of the damping force adjustable permanent magnet type magnetic current variable damper.
Description
Technical field
The invention belongs to a kind of MR damper, be specifically related to the adjustable permanent magnet type magnetic current variable damper of a kind of damping force.
Background technique
MR damper is a kind of intelligent vibration damping device, the size of its damping force can be carried out remote stepless by the control power supply and be regulated, therefore, common MR damper must be equipped with the control power supply and could realize MR damper is exported the purpose that damping force is regulated; People have developed permanent magnet type magnetic current variable damper in order to reduce MR damper again to the dependence of control power supply, as the patent No. be: permanent magnetism regulating type MR damper and the number of patent application of ZL2008200999097 are: 2005100311088 permanent-magnet adjusting assembled magnetorheological buffer, although they also can not need to control power supply and work alone, though its damping force also can change by certain mode, but after in a single day this class permanent magnet type magnetic current variable damper completes, the size of its damping force is difficult to regulate continuously according to field condition, therefore, its use occasion has been subjected to certain restriction.
Summary of the invention
In a single day after completing at existing permanent magnet type magnetic current variable damper, the size of its damping force is difficult to the deficiency of regulating continuously according to field condition, the present invention proposes the adjustable permanent magnet type magnetic current variable damper of a kind of damping force, the permanent magnet type magnetic current variable damper that damping force is adjustable can be regulated the damping force of its output at any time continuously according to the needs of on-the-spot vibration damping, thereby it is easy to use, applied widely.
The technical solution adopted in the present invention is as follows:
The permanent magnet type magnetic current variable damper that a kind of damping force is adjustable, it comprises clutch release slave cylinder, piston, two piston rods, built-in magnetic field generator and built-in magnetic field generator position adjusting mechanisms, piston is contained in the clutch release slave cylinder, and piston external diameter is less than the clutch release slave cylinder internal diameter and leave the mobile gap of magnetic flow liquid; Two piston rods are installed in the two ends of piston symmetrically, and an end of piston rod and an end of piston are fixed, and the other end of piston rod stretches out from clutch release slave cylinder one end by the seal arrangement and the bearing of clutch release slave cylinder end face, is full of magnetic flow liquid in the clutch release slave cylinder; Piston all has the identical central through bore of diameter with piston rod wherein; Built-in magnetic field generator and built-in magnetic field generator position adjusting mechanism are installed in the piston and piston rod with central through bore, have the piston rod of central through bore to be made of high magnetic conductive metal material.
The piston of the permanent magnet type magnetic current variable damper that damping force is adjustable is by thickness identical annulus form height magnetic conductive metal material and ring non-magnet_conductible material, by an annulus form height magnetic conductive metal material with after mode that a ring non-magnet_conductible material plane changes mutually makes up, with bonding or riveted joint or do not embed and in the magnetic conductive metal pipe it is fixed as one, the internal diameter of annulus form height magnetic conductive metal material and ring non-magnet_conductible material is identical with piston rod center hole internal diameter.Built-in magnetic field generator is by thickness identical disc permanent magnet and disk form height magnetic conductive metal material, by a disk form height magnetic conductive metal material with after mode that a disc permanent magnet plane changes mutually makes up, with bonding or riveted joint or do not embed and in the magnetic conductive metal pipe it is fixed as one, and the external diameter of disc permanent magnet is less than or equal to the external diameter of disk form height magnetic conductive metal material; The thickness of disk form height magnetic conductive metal material that constitutes built-in magnetic field generator is identical with the thickness of the annulus form height magnetic conductive metal material that constitutes piston; The external diameter of built-in magnetic field generator is less than the internal diameter of piston and piston rod center hole and leave glade plane space.
Built-in magnetic field generator position adjusting mechanism is made of bolt, nut and movable block, and movable block and built-in magnetic field generator are by bonding or riveted fixing, and nut is fixed in the piston rod; Adjust bolt and can adjust movable block and the position of built-in magnetic field generator in piston and piston rod central through bore.
Function of the present invention is achieved in that when an end of built-in magnetic field generator is positioned at the bottom of piston hole, the outer peripheral surface of disc permanent magnet overlaps with ring non-magnet_conductible material inner peripheral surface on the piston, and the inner peripheral surface of the annulus form height magnetic conductive metal material on ring non-magnet_conductible material two sides overlaps on the outer peripheral surface of the disk form height magnetic conductive metal material on disc permanent magnet two sides and piston; Because of the size of the ring non-magnet_conductible material thickness between two blocks of annulus form height magnetic conductive metal materials on the piston greater than glade plane space size sum between the size in gap between piston external diameter and clutch release slave cylinder internal diameter and built-in magnetic field generator external diameter and the piston center hole internal diameter, so, the magnetic line of force that disc permanent magnet on the built-in magnetic field generator produces is very little by the leakage field of two blocks of annulus form height magnetic conductive metal materials on the piston, so the magnetic line of force that the disc permanent magnet on the built-in magnetic field generator produces will be all by disc permanent magnet disk form height magnetic conductive metal material simultaneously, glade plane space between built-in magnetic field generator external diameter and the piston center hole internal diameter, piston lastblock annulus form height magnetic conductive metal material, magnetic flow liquid and clutch release slave cylinder shell in piston external diameter and the clutch release slave cylinder internal diameter gap, another piece annulus form height magnetic conductive metal material on the piston, glade plane space between built-in magnetic field generator external diameter and the piston center hole internal diameter, the disk form height magnetic conductive metal material of disc permanent magnet another side forms closed work magnetic circuit; Because of this magnetic line of force has covered gap between piston external diameter and clutch release slave cylinder internal diameter comprehensively, make the viscosity of the magnetic flow liquid in the gap of piston external diameter and clutch release slave cylinder internal diameter the highest, at this moment, the magnetic intensity maximum that piston produces, the damping force maximum of the permanent magnet type magnetic current variable damper output that damping force is adjustable.
After the built-in magnetic field generator of adjustment leaves piston hole bottom certain distance, the inner peripheral surface of the outer peripheral surface of two blocks of disk form height magnetic conductive metal materials of built-in magnetic field generator and the annulus form height magnetic conductive metal material on the piston misplaces, the distance of the annulus form height magnetic conductive metal storeroom on disk form height magnetic conductive metal material that is in disc permanent magnet one side and the piston that is in disc permanent magnet another side is reduced, at this moment, a part of magnetic line of force that the disc permanent magnet produces is directly by disc permanent magnet disk form height magnetic conductive metal material simultaneously and the annulus form height magnetic conductive metal material that is on the disc permanent magnet another side piston, the disk form height magnetic conductive metal material of disc permanent magnet another side forms the leakage field magnetic circuit; And another part of the magnetic line of force that the disc permanent magnet produces, will be by the disk form height magnetic conductive metal material of disc permanent magnet one side, glade plane space between built-in magnetic field generator external diameter and the piston center hole internal diameter, the annulus form height magnetic conductive metal material of a piston, magnetic flow liquid and clutch release slave cylinder shell in piston external diameter and the clutch release slave cylinder internal diameter gap, the annulus form height magnetic conductive metal material of another piece piston, glade plane space between built-in magnetic field generator external diameter and the piston center hole internal diameter, the disk form height magnetic conductive metal material of disc permanent magnet another side forms closed work magnetic circuit; Because of this magnetic line of force has partly covered gap between piston external diameter and clutch release slave cylinder internal diameter, make the viscosity of the part magnetic flow liquid in the gap of piston external diameter and clutch release slave cylinder internal diameter higher, the magnetic intensity that piston is produced is less, makes the output damping force of the adjustable permanent magnet type magnetic current variable damper of damping force less.
After in adjusting the center hole that built-in magnetic field generator all enters piston rod, the magnetic line of force that the disc permanent magnet of built-in magnetic field generator produces only passes through the tube wall closure of piston rod, at this moment, the magnetic intensity that piston produces is with minimum, gap between piston only and clutch release slave cylinder will not have the magnetic line of force to pass through, the output damping force minimum of adjustable permanent magnet type magnetic current variable damper.
Therefore, as long as adjust the distance that built-in magnetic field generator leaves the piston hole bottom, get final product the magnetic intensity that continuous regulating piston produces, make the size of the magnetic intensity in the gap between piston external diameter and clutch release slave cylinder internal diameter take place to change continuously, the viscosity of the magnetic flow liquid in the gap of piston external diameter and clutch release slave cylinder internal diameter is continuously changed, make the size of permanent magnet type magnetic current variable damper output damping force adjustable continuously.Therefore, compare with existing permanent magnet type magnetic current variable damper, the damping force of the permanent magnet type magnetic current variable damper that damping force of the present invention is adjustable has the advantage that can regulate continuously at any time according to the needs of on-the-spot vibration damping condition, has satisfied the demand of multiple occasion to the MR damper performance.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the sectional drawing of Fig. 1.
Fig. 3 is the magnetic field schematic representation of Fig. 1.
Fig. 4 is the adjusted schematic representation of built-in magnetic field generator among Fig. 1.
Fig. 5 is the schematic representation that built-in magnetic field generator is all adjusted to piston rod inside among Fig. 1.
Embodiment
Describe structure of the present invention in detail below in conjunction with accompanying drawing:
Referring to Fig. 1, this is a kind of concrete structure of the present invention, and piston 19 is by the left side of magnetic conductive metal not plate washer 3, high magnetic conductive metal ring 5, not magnetic conductive metal ring 7 and the right plate washer 8 of magnetic conductive metal not, does not embed to constitute in the magnetic conductive metal pipe 6; Magnetic conductive metal piston rod 22 is not fixed on the left plate washer 3 by screw thread, and the high magnetic conductive metal piston rod 12 of band central through bore is fixed on the right plate washer 8 by screw thread; Piston rod 12 and piston rod 22 stretch out from clutch release slave cylinder 1 two ends by the seal ring 10 and the bearing 11 at clutch release slave cylinder 1 two ends of being made by high magnetic conductive metal material, are full of magnetic flow liquid 2 in clutch release slave cylinder 1; Built-in magnetic field generator 20 adopts screws 15 to be fixed on the movable block 9 by the high magnetic conductive metal disk 16 of being with center hole and permanent magnet 17 and forms; The external diameter of permanent magnet 17 is less than the external diameter of high magnetic conductive metal disk 16, make the internal diameter of the center hole of the external diameter of permanent magnet 17 and piston 19 form annularair gap 18, the external diameter of high magnetic conductive metal disk 16 is less than the internal diameter of piston 19 and piston rod 12 center holes and leave glade plane space 23, be fixed on because of nut 13 in the center hole of piston rod 12, adjust bolt 14 and can adjust movable block 9 and the position of built-in magnetic field generator 20 in piston 19 and piston rod 12 center holes.
When an end of built-in magnetic field generator 20 is positioned at the bottom of piston hole, referring to Fig. 3, the magnetic line of force that the N utmost point of the permanent magnet 17A in the built-in magnetic field generator 20 produces is by high magnetic conductive metal disk 16A, glade plane space 23 between the external diameter of high magnetic conductive metal disk 16A and the piston center hole internal diameter, high magnetic conductive metal ring 5A on the piston 19 and magnetic conductive metal pipe 6 not, gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, the tube wall of clutch release slave cylinder 1, gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, the high magnetic conductive metal ring 5B on magnetic conductive metal pipe 6 and the piston 19 not, glade plane space 23 between the external diameter of high magnetic conductive metal disk 16B and the piston center hole internal diameter, high magnetic conductive metal disk 16B arrives the S utmost point of permanent magnet 17A and forms closed-loop path (seeing frame of broken lines among the figure);
Because of on the piston 19 not the size of magnetic conductive metal ring 7A thickness greater than the size sum of glade plane space 23 between the size in gap 4 and built-in magnetic field generator 20 external diameters and the piston center hole internal diameter between the pipe thickness size of magnetic conductive metal pipe 6 and piston 19 external diameters and clutch release slave cylinder 1 internal diameter not on the piston 19, so, the magnetic line of force that permanent magnet 17A produces is very little by the leakage field of two annulus form height magnetic conductive metal material 5A on the piston and 5B, so, the magnetic line of force that permanent magnet 17A produces is basically all by the gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, and the situation of permanent magnet 17B is also identical with it, so, the magnetic intensity maximum of piston 19 generations this moment, it is the magnetic intensity maximum in the gap 4, make the viscosity of the magnetic flow liquid in the gap 4 the highest, the damping force of the permanent magnet type magnetic current variable damper output that damping force is adjustable is also maximum.
Make built-in magnetic field generator 20 leave piston hole bottom certain distance 21 when adjusting bolt 14, referring to Fig. 4, after the inner peripheral surface of two high magnetic conductive metal disk 16A of built-in magnetic field generator 20 and the outer peripheral surface of 16B and high magnetic conductive metal ring 5A on the piston 19 and 5B misplaces, on the one hand because of the high magnetic conductive metal disk 16A of built-in magnetic field generator 20 and the hypotelorism of the high magnetic conductive metal ring 5B on the piston 19, make in the magnetic line of force that the N utmost point of permanent magnet 17A produces a part directly from high magnetic conductive metal disk 16A by on air gap 18A and the piston 19 not magnetic conductive metal ring 7A and high magnetic conductive metal disk 16B arrive the S utmost point of permanent magnet 17A, thereby produced bigger leakage field; On the other hand because of high magnetic conductive metal disk 16A and high magnetic conductive metal ring 5A, the area of contact of high magnetic conductive metal disk 16B and high magnetic conductive metal ring 5B reduces, another part in the magnetic line of force that the N utmost point of permanent magnet 17A produces is by high magnetic conductive metal disk 16A, glade plane space 23 between the external diameter of high magnetic conductive metal disk 16A and the piston center hole internal diameter, high magnetic conductive metal ring 5A on the piston 19 and magnetic conductive metal pipe 6 not, gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, the tube wall of clutch release slave cylinder 1, gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, the magnetic conductive metal pipe 6, high magnetic conductive metal ring 5B on the piston 19, glade plane space 23 between the external diameter of high magnetic conductive metal disk 16B and the piston center hole internal diameter, high magnetic conductive metal disk 16B arrives the S utmost point of permanent magnet 17A and forms closed magnetic circuit, because the leakage field of permanent magnet 17A is bigger, so, only some has passed through the gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter in the magnetic line of force that permanent magnet 17A produces, and the situation of permanent magnet 17B is also identical with it, so, this moment, the magnetic intensity of piston 19 generations was less, be that magnetic intensity in the gap 4 is less, make the viscosity of the magnetic flow liquid in the gap 4 lower, the damping force of the permanent magnet type magnetic current variable damper output that damping force is adjustable is also less.
After adjusting bolt 14 and making built-in magnetic field generator 20 all enter in the center hole of piston rod 12, referring to Fig. 5, the magnetic line of force that the disc permanent magnet 17A of built-in magnetic field generator 20 and 17B produce can only form closed magnetic circuit by the tube wall of piston rod 12, at this moment, the magnetic intensity that piston 19 produces is with minimum, to there be the magnetic line of force to pass through in the gap 4 between piston 19 external diameters and clutch release slave cylinder 1 internal diameter, the viscosity of the magnetic flow liquid in the gap 4 does not change the output damping force minimum of adjustable permanent magnet type magnetic current variable damper.
Claims (5)
1. permanent magnet type magnetic current variable damper that damping force is adjustable, it comprises clutch release slave cylinder, piston, two piston rods, built-in magnetic field generator and built-in magnetic field generator position adjusting mechanisms, described piston is contained in the clutch release slave cylinder, and piston external diameter is less than the clutch release slave cylinder internal diameter and leave the mobile gap of magnetic flow liquid; Described two piston rods are installed in the two ends of piston symmetrically, and an end of piston rod and an end of piston are fixed, and the other end of piston rod stretches out from clutch release slave cylinder one end by the seal arrangement and the bearing of clutch release slave cylinder end face, is full of magnetic flow liquid in the clutch release slave cylinder; It is characterized in that: piston all has the identical central through bore of diameter with piston rod wherein; Built-in magnetic field generator and built-in magnetic field generator position adjusting mechanism are installed in the piston and piston rod with central through bore, have the piston rod of central through bore and clutch release slave cylinder to be made of high magnetic conductive metal material.
2. as the adjustable permanent magnet type magnetic current variable damper of claims 1 described a kind of damping force, it is characterized in that: described piston is by thickness identical n piece annulus form height magnetic conductive metal material and n-1 piece ring non-magnet_conductible material, by an annulus form height magnetic conductive metal material with after mode that a ring non-magnet_conductible material plane changes mutually makes up, with bonding or riveted joint or do not embed and in the magnetic conductive metal pipe it is fixed as one, the internal diameter of annulus form height magnetic conductive metal material and ring non-magnet_conductible material is identical with the internal diameter of piston rod center hole.
3. as the adjustable permanent magnet type magnetic current variable damper of claims 1 described a kind of damping force, it is characterized in that: described built-in magnetic field generator is by thickness identical n piece disk form height magnetic conductive metal material and n-1 piece disc permanent magnet, by a disk form height magnetic conductive metal material with after mode that a disc permanent magnet plane changes mutually makes up, with bonding or riveted joint or do not embed and in the magnetic conductive metal pipe it is fixed as one, the external diameter of described disc permanent magnet is less than or equal to the external diameter of disk form height magnetic conductive metal material; The external diameter of built-in magnetic field generator is less than the internal diameter of piston and piston rod central through bore and leave glade plane space; The thickness of disk form height magnetic conductive metal material that constitutes built-in magnetic field generator is identical with the thickness and the quantity of the annulus form height magnetic conductive metal material of formation piston with quantity, and the thickness of disc permanent magnet that constitutes built-in magnetic field generator is identical with the thickness and the quantity of the ring non-magnet_conductible material of formation piston with quantity.
4. as the adjustable permanent magnet type magnetic current variable damper of claims 1 described a kind of damping force, it is characterized in that: glade plane space size sum between the size in gap and built-in magnetic field generator external diameter and the piston center hole internal diameter between described piston external diameter and the clutch release slave cylinder internal diameter, less than the size of the ring non-magnet_conductible material thickness that constitutes piston.
5. as the adjustable permanent magnet type magnetic current variable damper of claims 1 described a kind of damping force, it is characterized in that: described built-in magnetic field generator position adjusting mechanism is made of bolt, nut and movable block, movable block and built-in magnetic field generator are by bonding or riveted fixing, and nut is fixed in the piston rod; Adjust bolt and can adjust movable block and the position of built-in magnetic field generator in piston and piston rod central through bore.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101126634A CN101749358B (en) | 2010-02-24 | 2010-02-24 | Damping force adjustable permanent magnet type magnetic current variable damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101126634A CN101749358B (en) | 2010-02-24 | 2010-02-24 | Damping force adjustable permanent magnet type magnetic current variable damper |
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| CN101749358A true CN101749358A (en) | 2010-06-23 |
| CN101749358B CN101749358B (en) | 2011-11-30 |
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| CN2010101126634A Expired - Fee Related CN101749358B (en) | 2010-02-24 | 2010-02-24 | Damping force adjustable permanent magnet type magnetic current variable damper |
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| CN114135619A (en) * | 2021-11-13 | 2022-03-04 | 安徽工程大学 | Damping type energy dissipation device repairing device based on magnetic control principle |
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