A magnetorheological rotation damper

Abstract

The invention discloses a magnetorheological rotation damper, comprising a sleeve component, a screw component and an electromagnetic damping component; the screw component is arranged inside the sleeve component; the screw component and the sleeve component form a sealed cavity, and the sealed cavity is filled with magnetorheological fluid; the electromagnetic damping component comprises a blade and an eddy current plate; when an external force causes the screw component and the sleeve component in the damper to move relative to each other, the screw component drives the blade to rotate, and the blade drives the magnetorheological fluid in the sleeve component to flow, and causes the magnetic field in the sleeve component to change, and generates an induced current in the eddy current plate, and the induced current causes the eddy current plate to heat up; the flow of the magnetorheological fluid helps accelerate the heat dissipation of the damper, and the magnetorheological fluid generates viscous damping on the rotation of the blade; the invention combines the respective 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

[0001] The invention relates to the technical field of structural vibration reduction, and in particular to a magnetorheological rotation damper. Background Art

[0002] The damper can provide a semi-active damping force, effectively reducing the vibration response of the structure and greatly improving the seismic performance of the structure. However, the traditional damper is not energy efficient, and the traditional damper has a single control function. It cannot cope with different types of vibration inputs within a limited volume. The traditional damper protection function is not comprehensive and can no longer meet the performance requirements of modern structural vibration control. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a magnetorheological rotary damper that can meet different variable damping force requirements.

[0004] According to a first aspect of an embodiment of the present invention, there is provided a magnetorheological rotational damper, comprising: a sleeve component, a screw component and an electromagnetic damping component; wherein the screw component is arranged in the sleeve component, and the screw component and the sleeve component move relative to each other; wherein the cylinder body of the screw component and the sleeve component form a sealed chamber, and a magnetorheological fluid is arranged in the sealed chamber; wherein the electromagnetic damping component comprises a blade and an eddy current plate, the eddy current plate and the blade are both in the magnetorheological fluid, the blade is connected to the screw component, the screw component drives the blade to rotate, the rotation of the blade drives the magnetorheological fluid to flow, and generates a magnetic induction current in the eddy current plate.

[0005] Beneficial effect: This magnetorheological rotation damper senses the vibration force through the screw component. When the screw component and the sleeve component undergo relative linear motion, the screw component drives the blade to rotate. On the one hand, the magnetorheological fluid damps the rotation of the blade. On the other hand, the movement of the magnetorheological fluid causes the magnetic field in the sleeve component to change. The change in the magnetic field causes the eddy current plate to generate a magnetically induced current. The magnetically induced current generates heat due to the resistance of the eddy current plate. The heat is gradually dissipated with the moving magnetorheological fluid. At the same time, the respective advantages of eddy current and fluid damping are utilized, and the problems of low heat dissipation and rotational damping efficiency of the eddy current plate can be solved to meet different variable damping force requirements.

[0006] According to the magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the eddy current plate is wrapped with an insulating layer.

[0007] According to the magnetorheological rotation damper of the first embodiment of the present invention, the eddy current plate is arranged in the sleeve component, and the eddy current plate is perpendicular to the axial direction of the screw component.

[0008] According to the magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the blades are arranged in multiple groups, and the eddy current plates are located between the blades.

[0009] According to the magnetorheological rotation damper of the first aspect of the present invention, the screw component includes a ball nut and a screw, the ball nut is arranged on the screw along the axial extension direction of the sleeve component, the screw drives the ball nut to rotate, and the ball nut is fixedly connected to the blade.

[0010] According to the magnetorheological rotation damper of the first embodiment of the present invention, a bearing is provided between the ball nut and the sleeve component, and a sealing member is provided on one side of the bearing.

[0011] According to the magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the sealing element is a mechanical seal or an oil seal.

[0012] According to the magnetorheological rotation damper of the first embodiment of the present invention, one end of the screw is nested in the sleeve component, and the other end of the screw is provided with a first earring.

[0013] According to the magnetorheological rotation damper of the first embodiment of the present invention, one end of the sleeve component is provided with a hole capable of accommodating the screw rod, and the other end of the sleeve component is provided with a second earring.

[0014] According to the magnetorheological rotation damper of the embodiment of the first aspect of the present invention, a limit block is provided at one end of the screw rod, and a limit plate cooperating with the limit block is provided in the sleeve component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0016] Figure 1 A front view of an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0018] Figure 3 for Figure 1 Cross-sectional view of BB. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1 to Figure 3 A magnetorheological rotation damper comprises: a sleeve component 10, a screw component and an electromagnetic damping component; wherein the screw component is arranged in the sleeve component 10, and the screw component and the sleeve component 10 can move relative to each other; wherein the cylinder body of the screw component and the sleeve component 10 forms a sealed chamber, and a magnetorheological fluid 33 is arranged in the sealed chamber; wherein the electromagnetic damping component comprises a blade 32 and an eddy current plate 31, and the eddy current plate 31 and the blade 32 are both in the magnetorheological fluid 33, and the blade 32 is connected to the screw component, and the screw component drives the blade 32 to rotate, and the rotation of the blade 32 drives the magnetorheological fluid 33 to flow, and the eddy current plate 31 is induced by the moving magnetorheological fluid 33, and a magnetic induction current is generated in the eddy current plate 31. This magnetorheological rotation damper senses the vibration force through the screw component. When the screw component and the sleeve component 10 undergo relative linear motion, the screw component drives the blade 32 to rotate. On the one hand, the magnetorheological fluid 33 damps the rotation of the blade 32. On the other hand, the movement of the magnetorheological fluid 33 causes the magnetic field in the sleeve component 10 to change. The change in the magnetic field causes the eddy current plate 31 to generate a magnetic induced current. The magnetic induced current generates heat due to the resistance of the eddy current plate 31, and the heat is gradually dissipated with the moving magnetorheological fluid 33. At the same time, the respective advantages of eddy current and fluid damping are utilized, and the problems of low heat dissipation and rotation damping efficiency of the eddy current plate 31 can be solved to meet different variable damping force requirements.

[0024] In this embodiment, the magnetorheological fluid 33 is a suspension formed by mixing tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic conductive liquid. The eddy current plate 31 is a plate with a certain resistance.

[0025] In this embodiment, to ensure safety and avoid leakage, the eddy current plate 31 is fixed on the fixing seat 34 , and the eddy current plate 31 is wrapped with an insulating layer. The insulating layer can ensure that the current is consumed in the eddy current plate 31 .

[0026] In this embodiment, the eddy current plate 31 is arranged in the sleeve component 10, specifically vertically arranged, and the eddy current plate 31 is perpendicular to the axial direction of the screw component. Preferably, multiple groups of blades 32 can be arranged, and the eddy current plate 31 is located between the blades 32 to improve the conversion efficiency of electric energy and heat and increase the damping force. Specifically, the blades 32 are parabolic and have good radial displacement and dispersion capabilities.

[0027] In this embodiment, the screw component includes a ball nut 22 and a screw 21. The screw 21 is arranged along the axial extension direction of the sleeve component 10. The ball nut 22 is arranged on the screw 21. The screw 21 drives the ball nut 22 to rotate. The ball nut 22 is fixedly connected to the paddle 32. The paddle 32 is arranged in a circular array on the side wall of the ball nut 22 with the central axis of the ball nut 22 as the center.

[0028] In this embodiment, a bearing 41 is provided between the ball nut 22 and the sleeve component 10, and a seal 40 is provided on one side of the bearing 41. Specifically, two groups of bearings 41 and seals 40 are provided, and the two groups of bearings 41 are respectively provided on the ball nut 22 and located on both sides of the sleeve component 10, and the two groups of seals 40 are respectively provided at the two groups of bearings 41. Preferably, the seal 40 is a mechanical seal or an oil seal.

[0029] In this embodiment, one end of the screw rod 21 is nested in the sleeve part 10, and the other end of the screw rod 21 is provided with a first earring 23. One end of the sleeve part 10 is provided with a hole capable of accommodating the screw rod 21, and the other end of the sleeve part 10 is provided with a second earring 12. The first earring 23 and the second earring 12 are used to connect with the structure to ensure installation and positioning.

[0030] In this embodiment, a limit block 211 is provided at one end of the screw rod 21, and a limit plate 11 cooperating with the limit block 211 is provided in the sleeve component 10 to limit the movement stroke of the screw rod 21 to avoid failure of the magnetorheological rotation damper.

[0031] In this embodiment, the cross-sectional shape of the sleeve component 10 is approximately “T”-shaped, so as to accommodate the screw 21 , the eddy current plate 31 and the blade 32 at the same time.

[0032] When the magnetorheological rotation damper undergoes relative linear motion with the screw component through the sleeve component 10, the ball nut 22 drives the two groups of blades 32 to rotate. Since the sealed chamber surrounded by the bearing 41, the screw component and the cylinder body of the sleeve component 10 is filled with magnetorheological fluid 33, the two groups of blades 32 and the eddy current plate 31 are immersed in the magnetorheological fluid 33. According to the principles of fluid mechanics, the magnetorheological fluid 33 will generate damping on the rotation of the blades 32. The damping is related to the viscosity and density of the magnetorheological fluid 33 and the rotation speed of the blades 32. The viscosity and density of the magnetorheological fluid 33 can be adjusted to achieve the desired effect. The degree meets the needs of different damping forces; further, the rotation of the blade 32 drives the magnetorheological fluid 33 to move, and the movement of the magnetorheological fluid 33 causes the magnetic field in the sleeve component 10 to change. According to the principle of electromagnetics, the change in the magnetic field causes the eddy current plate 31 to generate a magnetic induced current, and the magnetic induced current generates heat due to the resistance of the eddy current plate 31, and the heat is dissipated through the moving magnetorheological fluid 33. At the same time, the respective advantages of eddy current and fluid damping are utilized, and the problems of low heat dissipation and rotational damping efficiency of the eddy current plate 31 can be solved to meet the needs of different variable damping forces.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A magnetorheological rotary damper, characterized in that: include: Sleeve component, screw component and electromagnetic damping component; The screw component is arranged in the sleeve component, and the screw component and the sleeve component can move relative to each other; The screw component and the cylinder body of the sleeve component form a sealed cavity, and a magnetorheological fluid is provided in the sealed cavity; The electromagnetic damping component includes a blade and an eddy current plate, the eddy current plate and the blade are both in the magnetorheological fluid, the blade is fixedly connected to the screw component, the screw component drives the blade to rotate, the rotation of the blade drives the magnetorheological fluid to flow, and generates a magnetic induction current in the eddy current plate; The eddy current plate is arranged in the sleeve component, and the eddy current plate is perpendicular to the axial direction of the screw component; The blades are arranged in multiple groups, and the eddy current plates are arranged between the blades.

2. The magnetorheological rotation damper according to claim 1, characterized in that: The eddy current plate is wrapped with an insulating layer.

3. The magnetorheological rotation damper according to claim 1, characterized in that: The screw component includes 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 to the blade.

4. The magnetorheological rotation damper according to claim 3, characterized in that: A bearing is arranged between the ball nut and the sleeve component, and a sealing member is arranged on one side of the bearing.

5. The magnetorheological rotation damper according to claim 4, characterized in that: The sealing element is a mechanical seal or an oil seal.

6. The magnetorheological rotation damper according to claim 3, characterized in that: One end of the screw rod is nested in the sleeve component, and the other end of the screw rod is provided with a first earring.

7. The magnetorheological rotation damper according to claim 6, characterized in that: One end of the sleeve component is provided with a hole capable of accommodating the screw rod, and the other end of the sleeve component is provided with a second earring.

8. The magnetorheological rotation damper according to claim 7, characterized in that: A limiting block is arranged at one end of the screw rod, and a limiting plate cooperating with the limiting block is arranged in the sleeve component.

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