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Dual-springmagnetorheologicalabsorber

A magneto-rheological shock absorber and double spring technology, which is applied in the direction of spring/shock absorber, shock absorber, spring, etc., can solve the problems of poor vibration damping effect and unchangeable output force, and achieve a wide range of changes and easy Assembly and maintenance, economical processing and good results

Active Publication Date: 2017-06-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing magneto-rheological damper has poor vibration damping effect during the damping process and the output force of the magnetorheological damper cannot be changed under the condition of no magnetic field or constant magnetic field strength, etc., the present invention provides a Double spring magnetorheological shock absorber

Method used

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  • Dual-springmagnetorheologicalabsorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see figure 1 and figure 2 , the double-spring magneto-rheological shock absorber includes two springs with different rigidities, a closed inner cylinder 5 coaxially sleeved on the piston rod 12 and a closed outer cylinder 6, the inner cylinder 5 and the outer cylinder Magneto-rheological fluids are respectively arranged in 6 .

[0042] The two springs with different rigidities are a small rigidity spring 2 and a large rigidity spring 8, and the rigidity of the large rigidity spring 8 is twice that of the small rigidity spring 2.

[0043] see figure 2 , the piston rod 12 in the inner cylinder 5 is equipped with an inner excitation coil 15 through an inner splint 13 to form an inner piston; the inner cylinder 5 in the outer cylinder 6 is equipped with an outer excitation coil 14 through an outer splint 14 to form an outer piston. Both the inner excitation coil 15 and the outer excitation coil 14 are single-stage coils, and the materials of the inner splint 13 and th...

Embodiment 2

[0056] see Figure 7 , In this embodiment, the double-spring magneto-rheological shock absorber of Embodiment 1 has been rotated by 180°.

[0057] The piston rod connector 1 is installed on the vibration source foundation, the vibration source foundation is located above, and the object to be damped is suspended and placed. The double-spring magneto-rheological shock absorber of this embodiment can be applied to the establishment of a shock-absorbing platform that needs to be suspended for vibration reduction. Its working principle is similar to that of Embodiment 1, wherein both the small stiffness spring 2 and the high stiffness spring 8 are extension springs. This embodiment can also achieve the purpose of vibration reduction.

Embodiment 3

[0059] see Figure 8 One end of the extension tube 11 is connected to the axially extending end of the inner cylinder body 5 located outside the vibration-damping object placement part 10, and the other end of the extension tube 11 is a circular baffle plate 9. The high stiffness spring 8 is sleeved on the extension tube 11, one end of the high stiffness spring 8 is connected to the first sealing end cover 4 on the axial end surface of the outer cylinder body 6, and the other end of the high stiffness spring 8 is connected to the baffle plate 9. The piston rod connecting piece 1 and the small stiffness spring 2 on the piston rod 12 are correspondingly located in the damped object placement piece 10; one end of the small stiffness spring 2 is connected to the piston rod connecting piece 1, and the other end is connected to the shaft of the outer cylinder body 6 To the second sealing end cap 7 of the other end face. Small stiffness spring 2 and big stiffness spring 8 are tensio...

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Abstract

The invention relates toadual-spring magnetorheological absorber. Thedual-spring magneto-rheological absorber comprises two springs withdifferent rigidity, an inner casing body and an outer casing body. The inner casing body and the outer casing body are respectively sleeved with a piston rod with same axis. The inner casing body and the outer casing body are respectively arranged on the magnetorheological fluid. An internal magnet exciting coil is sleeved with the piston rod of the inner casing body to form an inner piston. An external magnet exciting coil is sleeved with the periphery of the inner casing body inside the outer casing body to form an outer piston. The outer periphery of the outer casing body is connected with an absorbed objects placer. According to the absorbed objects and the characteristics of vibration source, the two springs with the different rigidity realize standstill or smaller displacement of the outer casing body relative to the inner casing body in the effective vibration reduction range. The problems of under pressure or pressure instability in the working cylinderare not form by the double striking stricture. The dual-spring magnet absorber possesses good processing technology and adopts crew for erection joint, thusthe assembly and the maintenance are easy.

Description

technical field [0001] The invention belongs to the technical field of vibration control and can be used for vibration isolation and damping of objects. The invention relates to a magneto-rheological shock absorber. Background technique [0002] Magnetorheological fluid is a functional material whose rheological properties change with the change of magnetic field. Its basic characteristics are: when there is no external magnetic field, the magnetorheological fluid presents a free-flowing Newtonian fluid state; Magnetorheological fluid can change from a liquid state with good flow state to a solid state within milliseconds, and its viscosity increases by several orders of magnitude in a very short time, showing viscoplastic fluid characteristics and a certain shear yield resistance. And the shear yield stress increases with the increase of the applied magnetic field intensity. After the magnetic field is removed, the magnetorheological fluid changes from a solid state to a l...

Claims

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Application Information

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IPC IPC(8): F16F9/53F16F9/50
CPCF16F9/50F16F9/535
Inventor 邓华夏韩光辉王明娴于连栋张进马孟超钟翔
Owner HEFEI UNIV OF TECH
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