CN102562898A

CN102562898A - Rotary damper with magnetorheological elastomers

Info

Publication number: CN102562898A
Application number: CN2012100438765A
Authority: CN
Inventors: 谭和平; 谢宁; 刘强; 谭晓婧
Original assignee: 谢宁
Current assignee: Liu Ancheng
Priority date: 2012-02-26
Filing date: 2012-02-26
Publication date: 2012-07-11
Anticipated expiration: 2032-02-26
Also published as: CN102562898B

Abstract

The invention discloses a rotary damper with magnetorheological elastomers, which comprises a cylindrical stator, an H-shaped rotor, conical damping wheels and two rotary shafts. End caps are arranged at two ends of the stator respectively, bearings are mounted in center holes of the end caps, and a magnetorheological elastomer layer is fixed on the inner surface of each of the end caps of the stator. An excitation coil is wound on the H-shaped rotor, four semi-conical grooves are respectively arranged in the middles of four branch end faces of the H-shaped rotor, axes of the semi-conical grooves are located on the diameter of the stator, and the diameter of each of the semi-conical grooves is larger than that of each damping wheel. The damping wheels are mounted in the semi-conical grooves respectively. One ends of the two rotary shafts are fixed with two ends of H-shaped rotor respectively, and the other ends of the two rotary shafts respectively extend out of the stator through the bearings on two end caps of the stator.

Description

A kind of magnetic rheology elastic body rotary type damper

Technical field

The invention belongs to a kind of damper, be specifically related to a kind of magnetic rheology elastic body rotary type damper.

Background technique

Existing revolving type magnetic rheologic damper is that rotor is placed in the clutch release slave cylinder; In clutch release slave cylinder, also be full of magnetic flow liquid; Adjust the damping force of its output through the viscosity that changes magnetic flow liquid in the clutch release slave cylinder; Magnetic flow liquid in clutch release slave cylinder is taken out of outside the clutch release slave cylinder with rotatingshaft; Normally between clutch release slave cylinder and rotatingshaft, adopt seal arrangement to solve the motive sealing problem of rotatingshaft, like one Chinese patent application number be: 200910251079.4 " a kind of screw rod type magnetorheological rotary damper " and one Chinese patent application number are: the high performance, multiple plates, revolving type magnetic rheologic damper of 200510040890.X; Because of magnetic flow liquid is the amalgam that in mineral oil, is added with the attritive powder of multiple composition; Therefore, it is carried out very difficulty of motive sealing, in case the leakage of magnetic flow liquid takes place; Light then make the decreased performance of revolving type magnetic rheologic damper; Heavy then make revolving type magnetic rheologic damper total failure, therefore, the motive sealing problem of magnetic flow liquid has become industry and has improved the MR damper major obstacle in working life.

Summary of the invention

In the deficiency aspect the rotatingshaft motive sealing, the present invention proposes brand-new revolving type magnetic rheologic damper, that is: a kind of magnetic rheology elastic body rotary type damper to existing revolving type magnetic rheologic damper.

Technological scheme of the present invention is following: a kind of magnetic rheology elastic body rotary type damper, and it comprises: stator, rotor, damping roller and two rotating shafts; Stator is a cylindrical shape, all is provided with end cap at the stator two ends, in the center hole of end cap, bearing is installed; The internal surface of stator two ends end cap has all been fixed one deck magnetic rheology elastic body; Rotor is I-shaped, on I-shaped rotor, is wound with field coil, and the groove of a half cone-shaped is all arranged at the middle part of four branch end faces of I-shaped rotor; The shaft axis of half cone-shaped groove is on the diameter of stator; The diameter of half cone-shaped groove is greater than the diameter of damping roller, and the damping roller is conical, in the half cone-shaped groove that the damping roller is installed in; One end of two rotating shafts and the two ends of I-shaped rotor are fixed; The other end of two rotating shafts stretches out in stator through the bearing on the end cap of stator two ends respectively, and rotor is installed in the stator, and the width between four branch end faces of I-shaped rotor is less than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends; Width on four branch end faces of I-shaped rotor between the damping roller is greater than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends, and the width on four branch end faces of I-shaped rotor between the damping roller is less than the spacing between the end cap of stator two ends; The end cap at stator two ends, rotor and damping roller constitute by permeability magnetic material, and wherein rotating shaft of two rotating shafts has central through bore, and the lighting outlet of rotor excitation coil leads to outside the stator through the center hole of rotating shaft, and two rotating shafts are made up of non-magnet_conductible material.

Function of the present invention be achieved in that since four branch end faces of I-shaped rotor between width less than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends; Width on four branch end faces of I-shaped rotor between the damping roller is greater than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends; Width on four branch end faces of I-shaped rotor between the damping roller is less than the spacing between the end cap of stator two ends; So; When rotating shaft drive rotor rotates in stator; Magnetic rheology elastic body on the end cap internal surface of stator two ends will be flattened by the damping roller on four branch end faces of I-shaped rotor, will receive certain damping due to rotation power thereby rotating shaft is driven when rotor rotates in stator; When field coil does not have electric current to pass through on rotor; There is not the magnetic line of force to pass through the magnetic rheology elastic body on the end cap internal surface of stator two ends; Therefore; The elasticity of the magnetic rheology elastic body on the end cap internal surface of stator two ends is less; On the rotor on the end cap internal surface of damping roller roll extrusion stator two ends magnetic rheology elastic body will receive less pressure, damping due to rotation power suffered when making rotating shaft drive rotor in stator, rotate is less, and the magnetic rheology elastic body on the end cap internal surface of stator two ends returns to normal after by the flattening of damping roller immediately; After field coil on the rotor feeds electric current; Rotor will generate an electromagnetic field; Because of stator two ends end cap, rotor and damping roller constitute by permeability magnetic material; So the magnetic line of force that the rotor electromagnetic field produces can form closed magnetic circuit through end face, the damping roller on four branch ends of rotor end face, the magnetic rheology elastic body on the end cap internal surface of stator two ends and the stator two ends end cap of four branch ends of rotor; Make the ferromagnetic particle in end face, the damping roller on four branch ends of rotor end face and the magnetic rheology elastic body between the end cap internal surface of stator two ends that is in four branch ends of rotor form chain or column aggregated structure and make its elasticity higher and " curing " at magnetic direction; When rotating shaft drive rotor rotates in stator; The electromagnetic field that rotor produces will rotate in stator along with the rotation of rotor; And the magnetic rheology elastic body on the end cap internal surface of constantly inswept stator two ends; Make magnetic rheology elastic body on the end cap internal surface of stator two ends under the effect of the magnetic line of force of rotor by " curings ", therefore, when the damping roller on four branch ends of rotor end face will receive bigger pressure during the quilt magnetic rheology elastic body of " curing " on the end cap internal surface of roll extrusion stator two ends; Damping due to rotation power suffered when rotating shaft drive rotor is rotated in stator is bigger; And the magnetic rheology elastic body on the end cap internal surface of stator two ends by the damping roller roll extrusion on four branch ends of rotor end face flat after, owing to the influence of the electromagnetic field that receives four branch ends of rotor end face is difficult to return to normal, have only after four branch ends of rotor end face leaves this zone just can return to normal; If rotor continues rotation, the magnetic rheology elastic body that has then returned to normal on the stator two ends end cap internal surface will so be gone round and begun again by (electromagnetic field of the rotor that turns over) " curing " and by damping roller roll extrusion on four branch ends of rotor end face once more.

Therefore; Get into the size of current in the field coil on the rotor through adjustment; Can adjust the generate an electromagnetic field size of intensity of rotor; Thereby change the elasticity size of the magnetic rheology elastic body on inner stator two ends, the electromagnetic field zone end cap internal surface that is in the generation of four branch ends of rotor end face, make the damping due to rotation power of magnetic rheology elastic body rotary type damper obtain adjustment.

Compare with existing magnetorheological rotary damper, do not make its structure simpler because of the magnetic rheology elastic body rotary type damper need not seal magnetic flow liquid, the stability and the reliability of its work are greatly enhanced.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

Fig. 2 is that the B of Fig. 1 is to sectional view.

Fig. 3 is that the A of Fig. 1 is to sectional view.

Fig. 4 is that the D of Fig. 1 is to sectional view.

Fig. 5 is that the C of Fig. 1 is to sectional view.

Dotted line among Fig. 6 is the schematic representation that field coil energising back electromagnetic field forms closed magnetic circuit on the rotor of the present invention.

Fig. 7 be on the rotor of the present invention during the rotor clockwise rotation of field coil energising back the C of Fig. 1 to sectional view.

Fig. 8 invents the D of Fig. 1 when field coil is switched on back rotor clockwise rotation on the rotor to sectional view.

Embodiment

Specify structure of the present invention below in conjunction with accompanying drawing:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5; This is a kind of concrete structure of the present invention; A kind of magnetic rheology elastic body rotary type damper; It comprises: the stator 5 that is made up of non-magnet_conductible material, the rotor 20 that is made up of permeability magnetic material, the

damping roller

2,9,16 and 24 that is made up of permeability magnetic material, the rotating

shaft

14 and 31 that is made up of non-magnet_conductible material; Stator 5 is a cylindrical shape; All be provided with

end cap

11 and 26 at stator 5 two ends; Bearing 13 and 28 are installed in the center hole of

end cap

11 and 26; Stator 5

end caps

11 and 26 internal surface have all been fixed one deck magnetic rheology

elastic body

10 and 25; Rotor 20 is I-shaped; On I-shaped rotor 20, be wound with

field coil

4,6,19 and 21; The

groove

41,42,43 and 44 that a half cone-shaped is all arranged at the middle part of four

branch end faces

45,46,47 of I-

shaped rotor

20 and 48; Half cone-

shaped groove

41,42,44 and 43 shaft axis are on the diameter of stator 1; Half cone-

shaped groove

41,42,43 and 44 diameter are greater than the diameter of

damping roller

2,9,16 and 24;

Damping roller

2,9,16 and 24 is conical;

Damping roller

2,9,16 and 24 is through in

axle

1 and 33,8 and 12,15 and 17, the 23 and 27 half cone-

shaped grooves

41,42,44 and 43 that are installed on it, and rotating shaft 14 and an end of 31 and the two ends of I-shaped rotor 20 are fixed, and the

rotating shaft

14 and 31 the other end stretch out in stator 5 through the bearing 13 and 28 on stator 5 two

ends end caps

11 and 26 respectively; Rotor 20 is installed in the stator 5; Width (seeing the W4 among Fig. 4 and Fig. 5 for details) between four branch end faces 45 of I-

shaped rotor

20 and 47,46 and 48 is less than the spacing (seeing the W3 among Fig. 4 and Fig. 5 for details) between the magnetic rheology

elastic body

10 and 25 on stator 5 two

ends end caps

11 and 26 internal surfaces, and

damping roller

2 and 24, the width between 9 and 16 (seeing the W2 among Fig. 4 and Fig. 5 for details) are greater than the spacing (seeing the W3 among Fig. 4 and Fig. 5 for details) between the magnetic rheology

elastic body

10 and 25 on stator 5 two

ends end caps

11 and 26 internal surfaces on four branch end faces 45 of I-

shaped rotor

20 and 47,46 and 48, and

damping roller

2 and 24, the width between 9 and 16 (seeing the W2 among Fig. 4 and Fig. 5 for details) are less than the spacing (seeing the W1 among Fig. 4 and Fig. 5 for details) between stator 5 two

ends end caps

11 and 26 on four branch end faces 45 of I-

shaped rotor

20 and 47,46 and 48; Rotating shaft 31 has central through bore 32, on the rotor 20

field coil

4,6,19 and 21 lighting outlet 30 center hole 32 through rotating shaft 31 lead to stator 5 outer with control power supply 29 and be connected.

Combine accompanying drawing that a kind of magnetic rheology elastic body rotary type damper of the present invention is further described now: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8; At control power supply 29 not on rotor 20 when

field coil

4,6,19 and 21 output currents; There is not the magnetic line of force to pass through the magnetic rheology

elastic body

10 and 25 on stator 5 two

ends end caps

11 and 26 internal surfaces; Therefore; Magnetic rheology elastic body 10 on stator 5 two

ends end caps

11 and 26 internal surfaces and 25 elasticity are less; On the rotor 20 on

damping roller

2 and 24,9 and 16 roll extrusion stators, 5 two

ends end caps

11 and 26 internal surfaces magnetic rheology

elastic body

10 and 25 will receive less pressure; Damping due to rotation power suffered when rotating shaft 14 drive rotors 20 are turned clockwise in stator 5 is less, and the magnetic rheology elastic body 10 on stator 5 two

ends end caps

11 and 26 internal surfaces and 25 returns to normal after being flattened by

damping roller

2 and 24,9 and 16 immediately; When controlling power supply 29 behind field coil on the rotor 20 4,6,19 and 21 output currents; Rotor 20 will generate an electromagnetic field; Because of stator 5 two

ends end caps

11 and 26, rotor 20 and

damping roller

2 and 24,9 and 16 constitute by permeability magnetic material; So the magnetic rheology elastic body 10 on

damping roller

2 and 24,9 and 16, stator 5 two

ends end caps

11 and 26 internal surfaces on four branch end end faces 45 of four branch ends 3 that the magnetic line of force that rotor 20 electromagnetic fields produce can be through

rotor

20 and 7,18 and 22

end face

45 and 47,46 and 48,

rotor

20 and 47,46 and 48 and 25 and stator 5 two

ends end caps

11 and 26 formation closed magnetic circuits (see for details: Fig. 6); Make

damping roller

2 and 24 on four branch

end end faces

45 and 47,46 and 48 of

end face

45 and 47,46 and 48, rotor 20 of four branch ends 3 being in

rotor

20 and 7,18 and 22,9 and 16 and stator 5 two

ends end caps

11 and 26 internal surfaces between magnetic rheology

elastic body

10 and 25 in ferromagnetic particle form chain or column aggregated structure and make its elasticity higher and " curing " at magnetic direction; Therefore; When the

damping roller

2 and 24,9 and 16 on four branch

end end faces

45 and 47,46 and 48 of rotor 20 will receive bigger pressure during by the magnetic rheology elastic body 10 of " curing " and 25 on roll extrusion stator 5 two

ends end caps

11 and 26 internal surfaces; Damping due to rotation power suffered when rotating shaft 14 drive rotors 20 are turned clockwise in stator 5 is bigger; And the magnetic rheology elastic body 10 on stator 5 two

ends end caps

11 and 26 internal surfaces and 25 by

damping roller

2 and 24,9 and 16 roll extrusion on four branch end end faces 45 of

rotor

20 and 47,46 and 48 flat after; Owing to the influence of the electromagnetic field of four branch end end faces 45 that receive

rotor

20 and 47,46 and 48 is difficult to return to normal, having only just can return to normal after four branch

end end faces

45 and 47,46 and 48 of rotor 20 leave this zone (sees for details: 51,52,53 and 54 among Fig. 7 and Fig. 8); If rotor 20 continues rotation; The magnetic rheology elastic body 10 that has then returned to normal on stator 5 two

ends end caps

11 and 26 internal surfaces and 25 will so be gone round and begun again by (electromagnetic field of the rotor 20 that turns over) " curing " and by

damping roller

2 and 24,9 and 16 roll extrusion on 20 4 branch end end faces 45 of rotor and 47,46 and 48 once more.Situation when rotating shaft 14 drive rotors 20 are rotated counterclockwise motion in stator 5 is similar with it, repeats no more here.

Claims

1. magnetic rheology elastic body rotary type damper, it comprises: stator, rotor, damping roller and two rotating shafts is characterized in that: said stator is a cylindrical shape, all is provided with end cap at the stator two ends, in the center hole of end cap, bearing is installed; The internal surface of said stator two ends end cap has all been fixed one deck magnetic rheology elastic body; Said rotor is I-shaped; On I-shaped rotor, be wound with field coil; The groove of a half cone-shaped is all arranged at the middle part of four branch end faces of I-shaped rotor, and the shaft axis of half cone-shaped groove is on the diameter of stator, and the diameter of half cone-shaped groove is greater than the diameter of damping roller; Said damping roller is conical, in the half cone-shaped groove that the damping roller is installed in; One end of said two rotating shafts and the two ends of I-shaped rotor are fixed, and the other end of two rotating shafts stretches out in stator through the bearing on the end cap of stator two ends respectively; Said rotor is installed in the stator; Width between four branch end faces of I-shaped rotor is less than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends; Width on four branch end faces of I-shaped rotor between the damping roller is greater than the spacing between the magnetic rheology elastic body on the end cap internal surface of stator two ends, and the width on four branch end faces of I-shaped rotor between the damping roller is less than the spacing between the end cap of stator two ends.

2. a kind of magnetic rheology elastic body rotary type damper as claimed in claim 1 is characterized in that: the end cap at said stator two ends, rotor and damping roller constitute by permeability magnetic material.

3. a kind of magnetic rheology elastic body rotary type damper as claimed in claim 1; It is characterized in that: wherein rotating shaft of said two rotating shafts has central through bore; The lighting outlet of rotor excitation coil leads to outside the stator through the center hole of rotating shaft, and said two rotating shafts are made up of non-magnet_conductible material.