CN2526589Y

CN2526589Y - Rotary magnetic rheological liquid damper

Info

Publication number: CN2526589Y
Application number: CN 01244463
Authority: CN
Inventors: 周刚毅; 陈刚; 张培强; 张先舟
Original assignee: University of Science and Technology of China USTC
Current assignee: University of Science and Technology of China USTC
Priority date: 2001-06-19
Filing date: 2001-06-19
Publication date: 2002-12-18
Anticipated expiration: 2011-06-19

Abstract

The utility model relates to a device which adopts the magneto-rheological fluid to produce the damping moment. The utility model comprises a damp disc piece, a rotary shaft, a magneto-rheological liquid, an internal shell and an external shell. The utility model is characterized in that the damp disc piece 5 is in barrel-shape and a core-shaped electromagnetic coil 1 is adopted. The external shell 3 covers outside of the damp disc piece; the internal shell 9 is arranged in the barrel mouth of the damp disc piece; the electromagnetic coil is encircled on the internal shell; the external edge of the electromagnetic coil is enclosed by a magnetic guide ring 4; a chamber between the internal shell, the magnetic guide ring and the external shell is filled with the magneto-rheological liquid; the damp disc piece is arranged in the chamber; the internal shell, the magnetic guide ring, the external shell and the chamber have the same center; a rotary shaft 6 passes through the four parts as the center of the four parts. The damping moment is obviously improved, the system is dense, the structure is simple, the volume is small and the magnetic field out-releasing does not occur, and the utilization ratio of the magnetic field is extremely high. Meanwhile, the moment is low when the electric current is zero, the electric controlled moment range is wide, the electric energy consumption is little; therefore, the utility model has high reliability and stability when working for a long time.

Description

Rotary magnetic rheological liquid damper

The utility model relates to damping device, especially relates to adopting the rotate device of damping torque of magnetic flow liquid.

At present, the research and design of magnetic rheological liquid damper is representative with U.S. Lord company.The supporting plane of rotary type damper is common disc structure, different just magnetic field layouts (position that is electromagnetic coil is divided into built-in and external two classes).For obtaining identical damping torque, built-in radial dimension is big and the axial dimension of external is bigger.Because the damping torque that single damping disc is produced is less, so also developed the damper of a plurality of discs.Compare with the monolithic damper, its damping torque increases with the increase of disc number.But the also corresponding increase of its axial dimension; And the operating current of electromagnetic coil wants corresponding increase many, and is constant in the magnetic intensity of magnetic flow liquid with guarantee effect; Simultaneously, the heat of power consumption generation also is difficult for distributing.That is to say, for traditional rotary type damper, make simple in structure, size is little, power consumption is few, then damping torque is less, and will make damping torque bigger, then big, the big energy-consuming of complex structure, size.

The purpose of this utility model provides the rotary magnetic rheological liquid damper that a kind of damping torque is bigger and simple in structure, size is little, power consumption is few.

Solution of the present utility model is as follows:

Compare with traditional monolithic structure, comprise the damping disc equally, rotating shaft, magnetic flow liquid, electromagnetic coil and housing etc., it is characterized in that the damping disc is a tubbiness, place between inner casing and the shell, jacket is outside the damping disc, inner casing places in the bung of damping disc, electromagnetic coil is on inner casing, the outer cause magnetic guiding loop sealing of electromagnetic coil, magnetic guiding loop links to each other with inner casing, the cover plate of inner casing links to each other with shell, inner casing, be full of magnetic flow liquid in the cavity between magnetic guiding loop and the shell, the damping disc promptly is arranged in this cavity, four is concentric, and rotating shaft is passed therebetween, as their center, at magnetic guiding loop, between damping disc and the interior housing-plate, and between inner casing and the rotating shaft non-magnetizer is set.

Innovation part of the present utility model is the damping disc is designed to tubbiness, and adopts core shape electromagnetic coil.Be that damping disc 5 is not common in the past simple disk, but be improved to combining of disk and cylinder, form barrel-like structure (disk is done a bucket end, cylinder is made a bucket wall).The damping disc is placed between inner casing 9 and the shell 3, and inner casing just in time is in the bung of damping disc, and shell also should be tubbiness mutually, covers on outside the damping disc of tubbiness; Adopt fastening piece to link to each other between the cover plate 11 of inner casing and the shell; Electromagnetic coil 1 is on inner casing, forming core shape structure (is that electromagnetic coil just looks like to be the fuse of damping disc, be not common in the past electromagnetic coil be positioned at the damping disc outer, just look like to be the cover of damping disc), its power lead 10 can pass the cover plate of inner casing or other unlikely generation magnetic flow liquid seepage part and draw; Outer cause magnetic guiding loop 4 sealing of electromagnetic coil, with isolated with magnetic flow liquid, magnetic guiding loop links to each other with inner casing, when inner casing is ' worker ' word shape, magnetic guiding loop can be tubular, when inner casing is the boss shape, magnetic guiding loop can be tubbiness; Damping disc, inner casing, magnetic guiding loop are concentric with shell, rotating shaft 6 passes therebetween, as their center, (can adopt key, pin or Cock screw etc. to cooperate for fixedly connected between rotating shaft and the damping disc, for the joint of strengthening coordinate force, damping disc can suitably increase size), to drive the rotation of damping disc, remaining parts (inner casing, magnetic guiding loop, shell etc.) then maintain static; Also form the cavity of tubbiness between inner casing, magnetic guiding loop and the shell, be full of magnetic flow liquid therebetween, the damping disc promptly is arranged in wherein (rotating at magnetic flow liquid), when promptly producing class, electromagnetic coil energising back, magnetic flow liquid solidify phenomenon, thereby to damping disc generation damping force; Between magnetic guiding loop and the interior housing-plate, between damping disc and the interior housing-plate and

non-magnetizer

2,8 is set between inner casing and the rotating shaft, to guarantee the magnetic line of force to pass the bucket end of damping disc and bucket wall (promptly avoiding the magnetic line of force to concentrate passes) from rotating shaft after shell and inner casing form magnetic closed-loop path (consulting Fig. 2); For preventing the seepage of magnetic flow liquid, all slits between the inner casing, shell, magnetic guiding loop and the damping disc that constitute its filled cavity, rotating shaft etc. all should adopt Sealing 7 to seal.

The utility model is owing to adopted tubbiness damping disc and core shape electromagnetic coil, thereby has following advantage: 1. because formed damping force is a moment of rotation between tubbiness damping disc and the magnetic flow liquid for rotating shaft, at the bottom of its size equals barrel and the sum of products of the damping force that produced of bucket wall each several part and its arm of force (each several part arrives the distance of rotating shaft), and maximum arm of force equals the radius of this barrel wall circumference.Obviously, bucket rotary damping moment that wall provided is the most effective, so damping obviously improves (when the surface area at bucket wall and the bucket end is identical, the damping torque that barrel damping torque that wall produced is produced at the bottom of approximately being barrel 4 times).2. because the structure of monolithic damping disc, low moment when making zero current, automatically controlled moment wide ranges, power consumption are few, and can as multi-sheet structure, not cause heat to be difficult to distribute, thereby power consumption and heating value also reduce greatly, thus system when working long hours reliability high and stable.3. because its unique core shape electromagnetic coil structure, make the volume that electromagnetic coil is in increases whole damper in the bung of damping disc, hardly, thereby system compact, simple in structure, volume is little, and does not have the magnetic field phenomenon that leaks, and makes the magnetic field utilization ratio very high.

Accompanying drawing 1 is a rotary type damper structural representation of the present utility model.Accompanying drawing 2 is the flux loop schematic representation.Accompanying drawing 3～6 is existing rotary type damper structural representation (accompanying drawing 3～4 is respectively monolithic external and built-in, and accompanying drawing 5～6 is respectively multi-disc external and built-in).

Embodiment of the present utility model following (consulting Fig. 1): damper external diameter (being the external diameter of shell 3) is 116mm, and highly (be the cover plate 11 of inner casing with after shell is connected total height) is 70mm, and the diameter of rotating shaft 6 is 10mm.The external diameter 98mm of tubbiness damping disc 5, the high 35mm of bucket wall, bucket wall thickness 5mm.The damping disc places between inner casing 9 and the shell, and inner casing is ' worker ' word shape, is in the bung of damping disc, and shell is tubbiness, covers on outside the damping disc; Adopt threaded piece to link to each other between the cover plate of inner casing and the shell; Electromagnetic coil 1 forms core shape structure on inner casing, magnetic guiding loop 4 sealings cylindraceous of the outer cause of electromagnetic coil, and the cover plate that power lead 10 passes inner casing links to each other with ABAP Adapter; Damping disc, inner casing, magnetic guiding loop are concentric with shell, rotating shaft passes therebetween, as their center, adopt between rotating shaft and the damping disc that key cooperates, the joint of damping disc is designed to the boss shape, be full of magnetic flow liquid in the tubbiness cavity between inner casing, magnetic guiding loop and the shell, the damping disc promptly rotates in magnetic flow liquid, when promptly producing class, electromagnetic coil energising back, magnetic flow liquid solidify phenomenon, thereby to damping disc generation damping force.Between the end face and interior housing-plate of magnetic guiding loop, be provided with non-magnetizer 2 between the end face of damping disc and the interior housing-plate, be provided with non-magnetizer 8 (place, inner casing upper and lower end face as shown in FIG.) between inner casing and the rotating shaft; All adopt Sealing 7 to seal in all slits between inner casing and the magnetic guiding loop, between magnetic guiding loop and the non-magnetizer 2, between non-magnetizer 2 and the shell, between the non-magnetizer 8 and rotating shaft of inner casing upper-end surface, between damping disc and rotating shaft and the shell.Electromagnetic coil adopts the coiling of 0.6mm enameled cable, and winding is 800～1000 circles, and internal diameter is 40mm.Resistance is 6 Ω.Work maximum current 2A, maximal input 24W.Adopt the magnetic flow liquid of U.S. Lord company.The damping torque that is provided is: 0.6Nm during null field, 30Nm during maximum current.Magnetic field utilization ratio height, several no leakage magnetic field (under the 2A exciting curent, device outer surface magnetic intensity is less than 0.6mT).

Claims

1, a kind of rotary magnetic rheological liquid damper, comprise the damping disc, rotating shaft, magnetic flow liquid, electromagnetic coil and housing etc., it is characterized in that damping disc (5) is a tubbiness, place between inner casing (9) and the shell (3), jacket is outside the damping disc, inner casing places in the bung of damping disc, electromagnetic coil (1) is on inner casing, outer cause magnetic guiding loop (4) sealing of electromagnetic coil, magnetic guiding loop links to each other with inner casing, the cover plate of inner casing (11) links to each other with shell, inner casing, be full of magnetic flow liquid in the cavity between magnetic guiding loop and the shell, the damping disc promptly is arranged in this cavity, four is concentric, and rotating shaft (6) is passed therebetween, as their center, at magnetic guiding loop, between damping disc and the interior housing-plate, and non-magnetizer (2 is set between inner casing and the rotating shaft, 8).