A semi-active magnetorheological rotary damper

Abstract

The invention discloses a semi-active magnetorheological rotary damper, comprising: a sleeve component, a screw component, an electromagnetic damping component and a semi-active control 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; the semi-active control component comprises an electromagnet component and a voltage control interface; when an external force causes the screw component and the sleeve component to move relative to each other, the screw component drives the blade to drive the magnetorheological fluid to flow and cause a change in the magnetic field, so that an induced current is generated in the eddy current plate, and an electromagnetic resistance is generated to the rotation of the blade, and the flow of the magnetorheological fluid assists the heat dissipation of the eddy current plate; when the damping force of the damper needs to be adjusted, the input voltage of the electromagnet component can be controlled, so as to adjust the viscosity of the magnetorheological fluid, and form real-time control of the damping force by an electrical signal; the invention realizes efficient energy conversion from kinetic energy to magnetic field energy, electric field energy and thermal energy.

Description

Technical Field

[0001] The invention relates to the technical field of structural vibration reduction, and in particular to a semi-active 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 semi-active magnetorheological rotary damper that can meet different variable damping force requirements.

[0004] According to a first aspect of the present invention, there is provided a semi-active magnetorheological rotary damper, comprising: a sleeve component, a screw component, an electromagnetic damping component and a semi-active control component; wherein the screw component is arranged in the sleeve component, and the screw component and the sleeve component can move relative to each other; wherein the screw component and the cylinder body of 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, and the eddy current plate and the blade are both in the magnetorheological fluid, and the blade is fixedly connected to the screw component, and the screw component drives the blade to rotate, and the rotation of the blade causes the magnetorheological fluid to flow, and generates a magnetic induced current in the eddy current plate; wherein the semi-active control component is arranged in the sleeve component, and the semi-active control component comprises an electromagnet assembly and a voltage control interface connected to the electromagnet assembly, and the magnetorheological fluid senses the magnetic field generated by the electromagnet assembly, causing the viscosity of the magnetorheological fluid to change.

[0005] Beneficial effect: This semi-active 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 movement of the magnetorheological fluid causes the magnetic field in the sleeve component to change. The magnetic field change causes the eddy current plate to generate a magnetic induction current. The magnetic induction current generates heat due to the resistance of the eddy current plate, and the heat is gradually dissipated with the moving magnetorheological fluid. On the other hand, voltage is input to the electromagnet assembly through the voltage control interface, so that the electromagnet assembly generates electromagnetic fields of different intensities. The shear strength of the magnetorheological fluid is affected by the magnetic field, and different damping forces are generated on the rotation of the blade. The rotational damping of the blade is effectively controlled through electrical signals, and the electric-to-magnetic damping control and magnetic-to-electrical energy recovery can be efficiently realized.

[0006] According to the semi-active magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the eddy current plate and the electromagnet assembly are both wrapped with an insulating layer.

[0007] According to the semi-active magnetorheological rotation damper of the first aspect of the embodiment of the present invention, the electromagnet assembly includes a first fixed seat, a magnet and a coil wound on the magnet, the first fixed seat is arranged in the sleeve component, the magnet is fixed on the first fixed seat, and the voltage control interface is connected to the coil.

[0008] According to the semi-active magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the voltage control interface is provided with a wire, and the wire is externally connected to the electrical signal input module.

[0009] According to the semi-active magnetorheological rotation damper of the embodiment of the first aspect of the present invention, the electromagnetic damping component further includes a second fixing seat, and the eddy current plate is fixed on the second fixing seat.

[0010] According to the semi-active magnetorheological rotation damper of the first embodiment of the present invention, the eddy current plate is vertically arranged in the sleeve component, and the eddy current plate is arranged perpendicular to the axis of the screw component.

[0011] According to the semi-active magnetorheological rotary 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.

[0012] According to the semi-active magnetorheological rotation damper of the embodiment of the first aspect of the present invention, multiple groups of electromagnet assemblies are provided, and the electromagnet assemblies are located outside the blades.

[0013] According to the semi-active magnetorheological rotational damper of the first aspect of the embodiment of the present invention, the screw component includes a ball nut and a screw, the screw is arranged along the axial extension direction of the sleeve component, the ball nut is arranged on the screw, the screw drives the ball nut to rotate, and the ball nut is fixedly connected to the blade.

[0014] According to the semi-active 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. 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 3A semi-active magnetorheological rotary damper comprises: a sleeve component 10, a screw component, an electromagnetic damping component and a semi-active control 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 encloses a sealed cavity, and a magnetorheological fluid 33 is arranged in the sealed cavity; 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 fixedly connected to the screw component, and the screw component drives the blade 32 to rotate, and the blade 3 The rotation causes the magnetorheological fluid 33 to flow, and the eddy current plate 31 induces the moving magnetorheological fluid 33, and generates a magnetic induction current in the eddy current plate 31; wherein the semi-active control component is arranged in the sleeve component 10, and the semi-active control component includes an electromagnet assembly 50 and a voltage control interface connected to the electromagnet assembly 50, and the magnetorheological fluid 33 induces the magnetic field generated by the electromagnet assembly 50, causing the viscosity of the magnetorheological fluid 33 to change, and feeding back the damping force to the blade 32, and the different magnetic fields generated by the electromagnet assembly 50 cause the magnetorheological fluid 33 to feed back different damping forces to the blade 32. This semi-active 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 movement of the magnetorheological fluid 33 causes the magnetic field in the sleeve component 10 to change. The magnetic field change causes the eddy current plate 31 to generate a magnetic induction current. The magnetic induction 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. On the other hand, a voltage is input to the electromagnet assembly 50 through the voltage control interface, so that the electromagnet assembly 50 generates electromagnetic fields of different intensities. The shear strength of the magnetorheological fluid 33 is affected by the magnetic field, and different damping forces are generated on the rotation of the blade 32. The rotational damping of the blade 32 is effectively controlled through electrical signals, and the electric-to-magnetic damping control and magnetic-to-electrical energy recovery can be efficiently realized.

[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. This suspension exhibits low viscosity Newtonian fluid characteristics under zero magnetic field conditions; and exhibits high viscosity and low fluidity Bingham body characteristics under strong magnetic field. Moreover, the rheology of the magnetorheological fluid 33 under the magnetic field is instantaneous and reversible, and its shear yield strength after rheology has a stable corresponding relationship with the magnetic field strength. The eddy current plate 31 is a plate with a certain resistance.

[0025] In this embodiment, in order to ensure safety and avoid leakage, the eddy current plate 31 and the electromagnet assembly 50 are wrapped with an insulating layer. The insulating layer can ensure that the current is consumed in the eddy current plate 31. Specifically, the electromagnet assembly 50 includes a first fixed seat 52, a magnet and a coil wound on the magnet. The first fixed seat 52 is arranged in the sleeve component 10, the magnet is fixed on the first fixed seat 52, and the voltage control interface is connected to the coil. Preferably, the voltage control interface is provided with a wire 51, and the wire 51 is externally connected to the electrical signal input module. Specifically, the electromagnetic damping component also includes a second fixed seat 34, and the eddy current plate 31 is fixed on the second fixed seat 34. Preferably, the first fixed seat 52 and the second fixed seat 34 are both made of insulating materials.

[0026] In this embodiment, the eddy current plate 31 is vertically disposed in the sleeve component 10 , and the eddy current plate 31 is disposed perpendicular to the axis of the screw component.

[0027] Preferably, the blades 32 are arranged in multiple groups, and the eddy current plates 31 are 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.

[0028] Preferably, multiple groups of electromagnet assemblies 50 are provided, and the electromagnet assemblies 50 are located outside the blades 32 to ensure that changes in the magnetic field can act evenly on the magnetorheological fluid 33 and ensure that the damping force generated on the blades 32 is stable.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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 semi-active magnetorheological rotation damper.

[0033] 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.

[0034] When the semi-active magnetorheological rotary damper undergoes relative linear motion with the sleeve component 10 and the screw component, the ball nut 22 drives the two sets 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 sets of blades 32, the eddy current plate 31, and the electromagnet assembly 50 are all immersed in the magnetorheological fluid 33. The rotation of the blades 32 drives the magnetorheological fluid 33 to move. 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 Magnetic induction current, the magnetic induction current generates heat due to the resistance of the eddy current plate 31, and the heat is dissipated through the moving magnetorheological fluid 33; further, according to the principle of fluid mechanics, the magnetorheological fluid 33 will damp the rotation of the blade 32, and the damping is related to the viscosity and density of the magnetorheological fluid 33 and the rotation speed of the blade 32. By controlling the voltage input to the electromagnet assembly 50, the electromagnet assembly 50 generates electromagnetic fields of different strengths, and the magnetorheological fluid 33 is affected by the magnetic field. The shear strength produces different damping forces on the rotation of the blade 32 to meet the needs of different variable damping forces. The rotational damping of the blade 32 is effectively controlled by electrical signals, and the electric-to-magnetic damping control and magnetic-to-electrical energy recovery can be efficiently realized.

[0035] 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 semi-active magnetorheological rotary damper, characterized in that: include: Sleeve components, screw components, electromagnetic damping components and semi-active control components; 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 causes the magnetorheological fluid to flow, and generates a magnetic induction current in the eddy current plate; The semi-active control component is arranged in the sleeve component, and the semi-active control component includes an electromagnet component and a voltage control interface connected to the electromagnet component, and the magnetorheological fluid senses the magnetic field generated by the electromagnet component, causing the viscosity of the magnetorheological fluid to change; The eddy current plate is vertically arranged in the sleeve component and is perpendicular to the axis of the screw component; The blades are arranged in multiple groups, and the eddy current plates are located between the blades.

2. The semi-active magnetorheological rotary damper according to claim 1, characterized in that: The eddy current plate and the electromagnet assembly are both wrapped with an insulating layer.

3. The semi-active magnetorheological rotary damper according to claim 2, characterized in that: The electromagnet assembly includes a first fixing seat, a magnet and a coil wound around the magnet. The first fixing seat is arranged in the sleeve component, the magnet is fixed on the first fixing seat, and the voltage control interface is connected to the coil.

4. The semi-active magnetorheological rotary damper according to claim 3, characterized in that: The voltage control interface is provided with a wire, and the wire is externally connected to an electrical signal input module.

5. The semi-active magnetorheological rotary damper according to claim 2, characterized in that: The electromagnetic damping component further comprises a second fixing seat, and the eddy current plate is fixed on the second fixing seat.

6. The semi-active magnetorheological rotary damper according to claim 1, characterized in that: The electromagnet components are arranged in multiple groups, and the electromagnet components are located outside the blades.

7. The semi-active magnetorheological rotary 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 on the screw, the screw drives the ball nut to rotate, and the ball nut is fixedly connected to the blade.

8. The magnetorheological rotation damper according to claim 7, 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.

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