A self-resetting composite viscous damper

Abstract

This utility model discloses a self-resetting composite viscous damper comprising: a guide rod, an ear plate, a magnetic piston, a first end cap, a second end cap, a first seal, a second seal, a first magnet, a second magnet, damping fluid, an outer cylinder, a conductor cylinder, and an auxiliary cylinder. One end of the guide rod is fixedly connected to the ear plate, and it sequentially passes through the first end cap, the first seal, the first magnet, the magnetic piston, the second magnet, the second seal, and the second end cap. The magnetic piston is fixedly positioned in the middle of the guide rod, and its magnetic poles are opposite to those of the first and second magnets. The first seal is located in a groove inside the first end cap, and the first magnet is coaxially fixed to the first end cap. The second seal is located in a groove inside the second end cap, and the second magnet is coaxially fixed to the second end cap. The conductor cylinder is fixedly positioned inside the outer cylinder, and both ends of the outer cylinder are fixedly connected to the first and second end caps respectively, forming a closed cavity filled with damping fluid. The auxiliary cylinder is fixedly positioned at the tail end of the outer cylinder. This utility model organically combines viscous damping and eddy current damping to achieve higher energy dissipation efficiency and also features a post-vibration self-resetting function.

Description

Technical Field

[0001] This utility model relates to the field of vibration control, and in particular to a self-resetting composite viscous damper. Background Technology

[0002] Viscous dampers are vibration control devices widely used in building structures, mechanical equipment, vehicle suspension systems, and structural seismic resistance and damping. They are primarily used to eliminate or reduce vibrations caused by external disturbances, protecting structures and equipment by reducing displacement, acceleration, and internal forces, thereby improving their reliability and safety. However, traditional viscous dampers do not inherently possess the ability to provide restoring force. Their working principle dictates that they can only provide a damping force (energy dissipation) opposite to the direction of the motion velocity, without generating a restoring force like a spring that drives it back to its equilibrium position. Therefore, under strong vibrations, even with viscous dampers installed, structures or equipment may still experience significant residual displacements due to other factors after the vibration. Large residual displacements can lead to structural tilting, equipment damage, and equipment malfunction, severely impacting the functionality and recoverability of the structure or equipment, and even requiring expensive repairs or reinforcement. Therefore, there is an urgent need for a new type of damping device that can both efficiently dissipate energy and actively provide restoring force to help structures or equipment return to their original position. Existing self-resetting technologies, such as dampers using shape memory alloys (SMA) or preloaded springs, can provide reset force, but they often suffer from problems such as high cost (SMA), large size, complex construction, relatively weak energy dissipation capacity, or unverifiable durability. Utility Model Content

[0003] To address the above problems, this invention provides a self-resetting composite viscous damper to solve the problem of insufficient active reset capability of existing viscous dampers.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A self-resetting composite viscous damper includes: a guide rod, an ear plate, a magnetic piston, a first end cap, a second end cap, a first seal, a second seal, a first magnet, a second magnet, damping fluid, an outer cylinder, a conductor cylinder, and an auxiliary cylinder. One end of the guide rod is fixedly connected to the ear plate, and it passes sequentially through the first end cap, the first seal, the first magnet, the magnetic piston, the second magnet, the second seal, and the second end cap. The magnetic piston is fixedly located in the middle of the guide rod, and its magnetic poles are opposite to those of the first and second magnets. The first seal is located in the inner groove of the first end cap, and the first magnet is coaxially fixed to the first end cap. The second seal is located in the inner groove of the second end cap, and the second magnet is coaxially fixed to the second end cap. The conductor cylinder is fixedly located inside the outer cylinder. Both ends of the outer cylinder are fixedly connected to the first end cap and the second end cap, respectively, forming a closed cavity filled with damping fluid. The auxiliary cylinder is fixedly located at the tail end of the outer cylinder.

[0005] Preferably, the outer diameter of the magnet piston is smaller than the inner diameter of the conductor cylinder, forming an annular damping channel;

[0006] Preferably, the outer diameters of the first magnet and the second magnet are equal to the inner diameter of the conductor cylinder;

[0007] Preferably, the inner diameters of the first magnet and the second magnet are larger than that of the guide rod;

[0008] Preferably, the inner diameter of the first magnet is smaller than the middle diameter of the first seal, and the inner diameter of the second magnet is smaller than the middle diameter of the second seal, for fixing the seal;

[0009] Preferably, the magnet piston, the first magnet, and the second magnet are magnetized in the same direction, either axially or radially.

[0010] The beneficial effects of this utility model are: First, this utility model combines the viscous damping energy dissipation mode of ordinary viscous damper by piston shearing damping fluid and the eddy current energy dissipation mode of eddy current damper conductor cutting magnetic field lines, which can achieve better energy dissipation and vibration reduction effect and higher performance indicators. Secondly, by using two pairs of magnets with opposite magnetic poles, the repulsive force between the relative magnetic poles is utilized to achieve a contactless self-resetting function. Compared with traditional self-resetting dampers, this utility model has lower cost, simpler structure, smaller size, and excellent energy consumption effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0013] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0014] Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention;

[0015] Figure 5 This is a cross-sectional view of Embodiment 3 of the present invention;

[0016] Figure 6 This is a cross-sectional view of Embodiment 4 of the present invention;

[0017] Figure 7 This is a cross-sectional view of Embodiment 5 of the present invention;

[0018] Figure 8 This is a cross-sectional view of Embodiment Six of this utility model;

[0019] Figure 9 This is a cross-sectional view of Embodiment Seven of this utility model;

[0020] Figure 10 This is a cross-sectional view of Embodiment 8 of the present utility model;

[0021] In the diagram, 1-guide rod, 2-ear plate, 3-magnetic piston, 4-first end cap, 5-second end cap, 6-first seal, 7-second seal, 8-first magnet, 9-second magnet, 10-damping fluid, 11-outer cylinder, 12-conductor cylinder, 13-auxiliary cylinder, 14-piston, 15-third magnet, 16-fourth magnet. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] Example 1: A self-resetting composite viscous damper, such as Figure 1-3 As shown, it includes: a guide rod, an ear plate, a magnetic piston, a first end cap, a second end cap, a first seal, a second seal, a first magnet, a second magnet, damping fluid, an outer cylinder, a conductor cylinder, and an auxiliary cylinder. A conductor tube is fixedly installed on the inner wall of the outer cylinder. The first end cap and the second end cap are detachably fixed to both ends of the outer cylinder by threads, and the sealing installation groove faces the inner side of the outer cylinder. The first seal and the second seal are respectively installed in the sealing installation grooves of the first end cap and the second end cap. The first / second magnet is magnetically attracted to the first / second end cap and presses down on the first / second seal to prevent the first / second seal from detaching from the installation groove. The guide rod passes through the first end cap, the first seal, the first magnet, the magnet piston, the second magnet, the second seal, and the second end cap in sequence. The magnet piston is fixed in the middle position of the guide rod. The space formed by the conductor tube, the guide rod, the magnet piston, the first magnet, and the second magnet is filled with damping fluid. The ear plate is fixedly installed at the top of the guide rod for external connection. The auxiliary cylinder is fixedly installed at the tail of the outer cylinder for external connection on the other side. The first magnet, the second magnet, and the magnet piston are magnetized axially. The S pole of the first magnet is attracted to the first end cap, and the N pole is opposite to the N pole of the magnet piston. The N pole of the second magnet is attracted to the first end cap, and the S pole is opposite to the S pole of the magnet piston.

[0024] Example 2: A self-resetting composite viscous damper, such as Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is that the N pole of the first magnet is attracted to the first end cap, and the S pole is opposite to the S pole of the magnet piston; the S pole of the second magnet is attracted to the first end cap, and the N pole is opposite to the N pole of the magnet piston.

[0025] Example 3: A self-resetting composite viscous damper, such as Figure 5 As shown, the difference between Embodiment 3 and Embodiment 1 is that the magnetization direction of the first magnet, the second magnet, and the magnet piston is radial magnetization, and the N pole of the first magnet, the second magnet, and the magnet piston is on the outside and the S pole is on the inside.

[0026] Example 4: A self-resetting composite viscous damper, such as Figure 6 As shown, the difference between Embodiment 4 and Embodiment 1 is that the magnetization direction of the first magnet, the second magnet, and the magnet piston is radial magnetization, and the S pole of the first magnet, the second magnet, and the magnet piston is on the outside and the N pole is on the inside.

[0027] Example 5: A self-resetting composite viscous damper, such as Figure 7 As shown, the difference between Embodiment 5 and Embodiment 1 is that the third magnet and the fourth magnet are attracted and fixed to both sides of the piston, and the magnet piston in Embodiment 1 is replaced by an assembly consisting of the third magnet, the fourth magnet and the piston. The magnetization direction of the third magnet and the fourth magnet is axial magnetization, the magnetic poles of the third magnet and the first magnet are opposite each other, and the magnetic poles of the fourth magnet and the second magnet are opposite each other.

[0028] Example 6: A self-resetting composite viscous damper, such as Figure 8 As shown, the difference between Embodiment Six and Embodiment Two is that the third magnet and the fourth magnet are attracted and fixed on both sides of the piston, and the magnet piston in Embodiment Two is replaced by an assembly consisting of the third magnet, the fourth magnet and the piston. The magnetization direction of the third magnet and the fourth magnet is axial magnetization, the magnetic poles of the third magnet and the first magnet are opposite each other, and the magnetic poles of the fourth magnet and the second magnet are opposite each other.

[0029] Example 7: A self-resetting composite viscous damper, such as Figure 9 As shown, the difference between Embodiment 7 and Embodiment 3 is that the third magnet and the fourth magnet are attracted and fixed to both sides of the piston, and the magnet piston in Embodiment 3 is replaced by an assembly consisting of the third magnet, the fourth magnet and the piston. The magnetization direction of the third magnet and the fourth magnet is radial magnetization, and both the third magnet and the fourth magnet have the N pole on the outside and the S pole on the inside.

[0030] Example 8: A self-resetting composite viscous damper, such as Figure 10 As shown, the difference between Embodiment 8 and Embodiment 4 is that the third magnet and the fourth magnet are attracted and fixed to both sides of the piston, and the magnet piston in Embodiment 4 is replaced by an assembly consisting of the third magnet, the fourth magnet and the piston. The magnetization direction of the third magnet and the fourth magnet is radial magnetization, and both the third magnet and the fourth magnet have the S pole on the outside and the N pole on the inside.

[0031] Working principle: When a structure equipped with a self-resetting composite viscous damper is subjected to earthquake or wind vibration, the guide rod drives the magnetic piston to move. The magnetic piston squeezes and shears the damping fluid to flow in the damper cavity, achieving viscous energy dissipation. At the same time, there is also relative motion between the magnetic piston and the conductor cylinder. The conductor cylinder cuts the magnetic field lines generated by the magnetic piston, generating an Ampere force in the opposite direction of motion, achieving eddy current energy dissipation. Compared with dampers with a single energy dissipation form, this invention can achieve better vibration reduction performance. When there is residual deformation in the structure or equipment after external disturbance, the magnetic piston inside the damper is displaced from the middle position, and the magnetic forces on both sides are in an unbalanced state. The magnetic force will drive the damper to return to the initial position, realizing the damper's non-contact self-resetting. Compared with self-resetting dampers using shape memory alloys or springs, this invention has a simpler structure, lower cost, and smaller space occupation.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-resetting composite viscous damper, characterized in that: include: The system comprises a guide rod, an ear plate, a magnetic piston, a first end cap, a second end cap, a first seal, a second seal, a first magnet, a second magnet, damping fluid, an outer cylinder, a conductor cylinder, and an auxiliary cylinder. One end of the guide rod is fixedly connected to the ear plate, and it passes sequentially through the first end cap, the first seal, the first magnet, the magnetic piston, the second magnet, the second seal, and the second end cap. The magnetic piston is fixedly positioned in the middle of the guide rod, and its magnetic poles are opposite to those of the first and second magnets. The first seal is located in the inner groove of the first end cap, and the first magnet is coaxially fixed to the first end cap. The second seal is located in the inner groove of the second end cap, and the second magnet is coaxially fixed to the second end cap. The conductor cylinder is fixedly positioned inside the outer cylinder, and both ends of the outer cylinder are fixedly connected to the first end cap and the second end cap, respectively, forming a closed cavity filled with damping fluid. The auxiliary cylinder is fixedly positioned at the tail end of the outer cylinder.

2. The self-resetting composite viscous damper according to claim 1, characterized in that: The outer diameter of the magnet piston is smaller than the inner diameter of the conductor cylinder, forming an annular damping channel.

3. The self-resetting composite viscous damper according to claim 1, characterized in that: The outer diameters of the first and second magnets are equal to the inner diameter of the conductor cylinder.

4. The self-resetting composite viscous damper according to claim 1, characterized in that: The inner diameters of the first and second magnets are larger than those of the guide rod.

5. A self-resetting composite viscous damper according to claim 1, characterized in that: The inner diameter of the first magnet is smaller than the inner diameter of the first seal, and the inner diameter of the second magnet is smaller than the inner diameter of the second seal, for fixing the seal.

6. The self-resetting composite viscous damper according to claim 1, characterized in that: The magnet piston, the first magnet, and the second magnet are magnetized in the same direction, either axially or radially.

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