CN112503130A - Magneto-rheological rotary damper - Google Patents
Magneto-rheological rotary damper Download PDFInfo
- Publication number
- CN112503130A CN112503130A CN202011463044.XA CN202011463044A CN112503130A CN 112503130 A CN112503130 A CN 112503130A CN 202011463044 A CN202011463044 A CN 202011463044A CN 112503130 A CN112503130 A CN 112503130A
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- Prior art keywords
- screw
- magnetorheological
- component
- paddle
- sleeve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a magnetorheological rotary damper, which comprises a sleeve component, a screw rod component and an electromagnetic damping component, wherein the sleeve component is provided with a first end and a second end; the screw rod component is arranged inside the sleeve component; the screw rod component and the sleeve component enclose a sealing cavity, and magnetorheological fluid is filled in the sealing cavity; the electromagnetic damping component comprises a paddle and an eddy current plate; when external acting force causes the relative motion between a screw rod component and a sleeve component in the damper, the screw rod component drives a paddle to rotate, the paddle drives magnetorheological fluid in the sleeve component to flow, magnetic field change in the sleeve component is caused, induction current is generated in the eddy current plate, and the induction current causes the eddy current plate to generate heat; the magnetorheological fluid flows to assist in accelerating the heat dissipation of the damper, and the magnetorheological fluid generates viscous damping on the rotation of the paddle; the invention combines the advantages of electromagnetic damping and viscous damping, and can solve the problem of low heat dissipation and rotation damping efficiency of the eddy current damper.
Description
Technical Field
The invention relates to the technical field of structural shock absorption, in particular to a magnetorheological rotary damper.
Background
The damper can provide a semi-active damping force, effectively lightens the vibration reaction of the structure and greatly improves the anti-seismic performance of the structure. However, the energy consumption of the traditional damper is not high, the control function of the traditional damper is single, the traditional damper cannot cope with different types of vibration input conditions under the limited volume, the protection function of the traditional damper is not comprehensive, and the performance requirement of the vibration control of the modern structure cannot be met.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides a magnetorheological rotary damper which can meet different variable damping force requirements.
According to an embodiment of the first aspect of the present invention, there is provided a magnetorheological rotary damper comprising: a sleeve member, a screw member and an electromagnetic damping member; wherein the screw member is disposed within the sleeve member, the screw member and the sleeve member moving relative to each other; wherein the screw rod component and the cylinder body of the sleeve component form a sealing cavity in an enclosing manner, and magnetorheological fluid is arranged in the sealing cavity; the electromagnetic damping component comprises a paddle and an electric vortex plate, the electric vortex plate and the paddle are both located in the magnetorheological fluid, the paddle is connected with the screw component, the screw component drives the paddle to rotate, the paddle rotates to drive the magnetorheological fluid to flow, and magnetic induction current is generated in the electric vortex plate.
Has the advantages that: the magneto-rheological rotary damper is characterized in that the screw component is used for inducing the action of vibration force, when the screw component and the sleeve component perform relative linear motion, the screw component drives the paddle to rotate, on one hand, magneto-rheological fluid damps the rotation of the paddle, on the other hand, magneto-rheological fluid motion causes the change of a magnetic field in the sleeve component, the change of the magnetic field causes the eddy current plate to generate magnetic induction current, the magnetic induction current generates heat due to the resistance of the eddy current plate, the heat is gradually dissipated along with the moving magneto-rheological fluid, the respective advantages of the eddy current and the fluid are utilized, the problem of low heat dissipation and rotary damping efficiency of the eddy current plate can be solved, and different variable damping force requirements are met.
According to an embodiment of the first aspect of the invention, the magnetorheological rotary damper has an insulating layer surrounding the eddy current plate.
According to the magnetorheological rotary damper of the embodiment of the first aspect of the invention, the eddy current plate is arranged in the sleeve part, and the eddy current plate is perpendicular to the axial direction of the screw part.
According to the magnetorheological rotary damper disclosed by the embodiment of the first aspect of the invention, the blades are arranged in multiple groups, and the eddy current plates are positioned between the blades.
According to the magnetorheological rotary damper, the screw part comprises the ball nut and the screw, the ball nut is arranged on the screw along the axial extension direction of the sleeve part, the screw drives the ball nut to rotate, and the ball nut is fixedly connected with the paddle.
According to the magnetorheological rotary damper of the embodiment of the first aspect of the invention, the bearing is arranged between the ball nut and the sleeve part, and one side of the bearing is provided with the sealing part.
According to the magnetorheological rotary damper of the embodiment of the first aspect of the invention, the sealing member is a mechanical seal or an oil seal.
According to the magnetorheological rotary damper, one end of the screw rod is nested in the sleeve part, and the other end of the screw rod is provided with the first lug ring.
According to the magnetorheological rotary damper of the embodiment of the first aspect of the invention, one end of the sleeve part is provided with a hole capable of accommodating the screw rod, and the other end of the sleeve part is provided with the second ear ring.
According to the magnetorheological rotary damper disclosed by the embodiment of the first aspect of the invention, one end of the screw rod is provided with the limiting block, and the sleeve part is internally provided with the limiting plate matched with the limiting block.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a cross-sectional view of B-B in fig. 1.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 3, a magnetorheological rotary damper includes: a sleeve member 10, a screw member and an electromagnetic damping member; wherein the screw member is arranged in the sleeve member 10, and the screw member and the sleeve member 10 can move relatively; wherein the screw rod component and the cylinder body of the sleeve component 10 enclose a sealing cavity, and magnetorheological fluid 33 is arranged in the sealing cavity; the electromagnetic damping part comprises a paddle 32 and an eddy current plate 31, the eddy current plate 31 and the paddle 32 are both positioned in magnetorheological fluid 33, the paddle 32 is connected with a screw part, the screw part drives the paddle 32 to rotate, the paddle 32 rotates to drive the magnetorheological fluid 33 to flow, the eddy current plate 31 is induced with the moving magnetorheological fluid 33, and magnetic induction current is generated in the eddy current plate 31. The magneto-rheological rotary damper is characterized in that a screw component senses the action of vibration force, when the screw component and a sleeve component 10 move linearly relatively, the screw component drives a paddle 32 to rotate, on one hand, magneto-rheological fluid 33 damps the rotation of the paddle 32, on the other hand, magneto-rheological fluid 33 moves to cause the change of a magnetic field in the sleeve component 10, the change of the magnetic field causes an eddy current plate 31 to generate magnetic induction current, the magnetic induction current generates heat due to the resistance of the eddy current plate 31, the heat is gradually dissipated along with the moving magneto-rheological fluid 33, the respective advantages of eddy current and fluid damping are utilized, the problems of low heat dissipation and low rotary damping efficiency of the eddy current plate 31 can be solved, and different variable damping force requirements are met.
In the present embodiment, the magnetorheological fluid 33 is a suspension in which fine soft magnetic particles having a high magnetic permeability and a low magnetic hysteresis are mixed with a non-magnetic conductive liquid. The eddy current plate 31 is a plate member having a certain resistance.
In this embodiment, in order to ensure safety and avoid electric leakage, the eddy current plate 31 is fixed on the fixing seat 34, and the insulating layer is wrapped outside the eddy current plate 31, and the insulating layer is arranged to ensure that current is consumed in the eddy current plate 31.
In the present embodiment, the eddy current plate 31 is disposed inside the sleeve member 10, specifically, vertically, and the eddy current plate 31 is perpendicular to the axial direction of the screw member. Preferably, a plurality of groups of blades 32 can be arranged, and the eddy current plate 31 is positioned between the blades 32, so that the conversion efficiency of electric energy and heat is improved, and the damping force is increased. Specifically, the blades 32 are parabolic and have good radial displacement and dispersion capability.
In the present embodiment, the screw member includes a ball nut 22 and a screw 21, the screw 21 is disposed along the axial extension direction of the sleeve member 10, the ball nut 22 is disposed on the screw 21, the screw 21 drives the ball nut 22 to rotate, the ball nut 22 is fixedly connected to the paddles 32, and the paddles 32 are disposed on the side wall of the ball nut 22 in a circumferential array around the central axis of the ball nut 22.
In this embodiment, a bearing 41 is provided between the ball nut 22 and the sleeve member 10, and a seal 40 is provided on one side of the bearing 41. Specifically, two sets of bearings 41 and two sets of sealing members 40 are provided, the two sets of bearings 41 are respectively provided on the ball nut 22 and located in both sides of the sleeve member 10, and the two sets of sealing members 40 are respectively provided at the two sets of bearings 41. Preferably, the seal 40 is a mechanical or oil-tight seal.
In the present embodiment, one end of the screw 21 is nested in the sleeve member 10, and the other end of the screw 21 is provided with a first ear ring 23. One end of the sleeve member 10 is provided with a bore capable of receiving the screw 21 and the other end of the sleeve member 10 is provided with a second ear 12. The first earring 23 and the second earring 12 are used for attachment to a structure to secure installation and positioning.
In this embodiment, a stopper 211 is disposed at one end of the screw 21, and a stopper plate 11 engaged with the stopper 211 is disposed in the sleeve member 10. The movement stroke of the screw 21 is limited, and the failure of the magnetorheological rotary damper is avoided.
In the present embodiment, the cross-sectional shape of the sleeve member 10 is approximately "T" shaped, facilitating accommodation of the screw 21, the eddy plate 31 and the paddle 32 at the same time.
When the magnetorheological rotary damper generates relative linear motion with a screw rod part through the sleeve part 10, the ball nut 22 drives the two groups of blades 32 to rotate, as a sealed cavity enclosed by the bearing 41, the screw rod part and a cylinder body of the sleeve part 10 is filled with magnetorheological fluid 33, the two groups of blades 32 and the eddy current plate 31 are both soaked in the magnetorheological fluid 33, according to the fluid mechanics principle, the magnetorheological fluid 33 can generate damping on the rotation of the blades 32, the damping is related to the viscosity and the density of the magnetorheological fluid 33 and the rotating speed of the blades 32, and the requirements of different damping forces can be met by adjusting the viscosity and the density of the magnetorheological fluid 33; furthermore, the rotation of the paddle 32 drives the magnetorheological fluid 33 to move, the magnetorheological fluid 33 moves to cause the magnetic field change in the sleeve part 10, according to the electromagnetic principle, the magnetic field change causes the eddy current plate 31 to generate magnetic induction current, the magnetic induction current generates heat due to the resistance of the eddy current plate 31, the heat is dissipated through the moving magnetorheological fluid 33, the respective advantages of eddy current and fluid damping are utilized, the problem of low heat dissipation and rotary damping efficiency of the eddy current plate 31 can be solved, and the requirements of different variable damping forces are met.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A magnetorheological rotational damper, comprising: a sleeve member, a screw member and an electromagnetic damping member;
wherein the screw member is disposed within the sleeve member, the screw member and the sleeve member being relatively movable;
the screw rod component and the cylinder body of the sleeve component enclose a sealed cavity, and magnetorheological fluid is arranged in the sealed cavity;
the electromagnetic damping component comprises a paddle and an eddy current plate, the eddy current plate and the paddle are both located in the magnetorheological fluid, the paddle is fixedly connected with the screw component, the screw component drives the paddle to rotate, the paddle rotates to drive the magnetorheological fluid to flow, and magnetic induction current is generated in the eddy current plate.
2. The magnetorheological rotational damper of claim 1, wherein: the eddy current plate is wrapped by an insulating layer.
3. The magnetorheological rotational damper of claim 1, wherein: the eddy current plate is arranged in the sleeve part and is perpendicular to the axial direction of the screw part.
4. The magnetorheological rotational damper of claim 3, wherein: the blades are provided with a plurality of groups, and the electric vortex plate is arranged between the blades.
5. The magnetorheological rotational damper of claim 3, wherein: the screw component comprises a ball nut and a screw, the screw is arranged along the axial direction of the sleeve component, the ball nut is nested outside the screw, the screw drives the ball nut to rotate, and the ball nut is fixedly connected with the paddle.
6. The magnetorheological rotational damper of claim 5, wherein: and a bearing is arranged between the ball nut and the sleeve part, and a sealing element is arranged on one side of the bearing.
7. The magnetorheological rotational damper of claim 6, wherein: the sealing element is a mechanical seal or an oil seal.
8. The magnetorheological rotational damper of claim 5, wherein: one end of the screw rod is nested in the sleeve part, and the other end of the screw rod is provided with a first lug ring.
9. The variable damping velocity type damper according to claim 8, wherein: one end of the sleeve part is provided with a hole capable of accommodating the screw rod, and the other end of the sleeve part is provided with a second earring.
10. The variable damping velocity type damper according to claim 9, wherein: and a limiting block is arranged at one end of the screw rod, and a limiting plate matched with the limiting block is arranged in the sleeve part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463044.XA CN112503130A (en) | 2020-12-14 | 2020-12-14 | Magneto-rheological rotary damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463044.XA CN112503130A (en) | 2020-12-14 | 2020-12-14 | Magneto-rheological rotary damper |
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| Publication Number | Publication Date |
|---|---|
| CN112503130A true CN112503130A (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011463044.XA Pending CN112503130A (en) | 2020-12-14 | 2020-12-14 | Magneto-rheological rotary damper |
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| CN (1) | CN112503130A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369968A (en) * | 2021-04-30 | 2021-09-10 | 西安交通大学 | Damping device and method for inhibiting cutting vibration of machine tool spindle and machine tool spindle |
-
2020
- 2020-12-14 CN CN202011463044.XA patent/CN112503130A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369968A (en) * | 2021-04-30 | 2021-09-10 | 西安交通大学 | Damping device and method for inhibiting cutting vibration of machine tool spindle and machine tool spindle |
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