Bidirectional velocity type magnetic damper

Abstract

The application provides a bidirectional speed type magnetic damper, which comprises a shell, a rack movably inserted into the shell, a transmission device and two passive conductor plates, two passive control devices, two conductor plates and a magnet assembly arranged in the shell, wherein the transmission device comprises a first rotating rod, a second rotating rod and a third rotating rod which are pivotally connected to the shell from bottom to top; the passive conductor plates are sleeved to the first rotating rod; the passive control devices are sleeved to the second rotating rod; the conductor plates are sleeved to the third rotating rod; in the working state, with the rack sliding relative to the shell, the conductor plates rotate to cut the magnet assembly and the passive control devices; the passive conductor plates rotate to cut the passive control devices. The embodiment can increase the damping force, delay the appearance period of the peak damping force of the damper, enhance the damping effect of the damper and reduce the cost of the damper relative to the active control technology.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and in particular to a bidirectional velocity-type magnetic damper. Background Technology

[0002] Currently, vibration control in civil engineering structures commonly employs both passive and active control technologies. For passive control, a relatively quick response and peak damping force are provided for low-speed vibrations. However, the damping effect gradually weakens as the vibration velocity increases.

[0003] While active control technology can overcome the shortcomings of passive control technology, it requires a huge amount of external energy for vibration reduction of building structures. From an economic perspective, the application and promotion of this active control technology are limited.

[0004] Therefore, a new type of damper is needed to solve the above problems. Summary of the Invention

[0005] The summary section of this invention provides a brief overview of the concepts, which will be described in detail in the detailed description section that follows. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] Some embodiments of the present invention provide a bidirectional velocity-type magnetic damper to solve the technical problems mentioned in the background section above.

[0007] Some embodiments of the present invention provide a bidirectional velocity-type magnetic damper, which includes a housing, a rack movably inserted into the housing, a transmission device, and two passive conductor plates, two passive control devices, two conductor plates, and a magnet assembly disposed in the housing.

[0008] The transmission device includes a first rotating rod, a second rotating rod, and a third rotating rod pivotally connected from bottom to top within the housing;

[0009] The magnet assembly is disposed on the upper part of the housing;

[0010] The passive conductor plate is fitted onto the first rotating rod; the passive control device is fitted onto the second rotating rod; the conductor plate is fitted onto the third rotating rod;

[0011] The first rotating rod is fitted with a first gear that meshes with the first side of the rack, and the two ends of the first rotating rod are respectively provided with second gears, the first gear being smaller than the second gear;

[0012] The two ends of the second rotating rod are respectively provided with a third gear that meshes with the two second gears in a one-to-one correspondence. The diameter of the second gear is larger than the diameter of the third gear.

[0013] The third rotating rod is fitted with a fourth gear that meshes with the second side of the rack;

[0014] In operation, as the rack slides relative to the housing, the conductor plate rotates and cuts the magnet assembly and the passive control device; the passive conductor plate rotates and cuts the passive control device.

[0015] The above embodiments of the present invention have the following beneficial effects: The bidirectional velocity-type magnetic damper of the present invention can increase the damping force while delaying the occurrence time of the peak damping force, thus compensating for the problem that the damping effect of passive control technology gradually weakens as the vibration velocity increases. Furthermore, compared with active control technology, this damper can reduce costs.

[0016] Specifically, because the rack meshes with the first gear and the fourth gear on both sides respectively, the first gear and the fourth gear rotate in opposite directions. The third gear meshes with the second gear, and the diameter of the second gear is larger than the diameter of the third gear, causing the third gear to rotate in opposite directions to the first gear. Furthermore, the speed of the third gear is greater than that of the first gear and the fourth gear.

[0017] A passive conductor plate is mounted on a first rotating rod, a passive control device is mounted on a second rotating rod, and a conductor plate is mounted on a third rotating rod, causing the conductor plate to cut the magnet assembly and the passive control device. The passive conductor plate rotates to cut the passive control device.

[0018] Because the conductor plate rotates at a low speed, when the passive control device reaches its peak damping force as the speed increases, the damping force of the magnetic assembly on the conductor plate has not yet reached its peak. Therefore, this damper can increase the damping force while delaying the occurrence of the peak damping force, thus making up for the problem that the damping effect of passive control technology gradually weakens as the vibration speed increases. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a structure of an embodiment of the bidirectional velocity-type magnetic damper of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of one embodiment of the transmission device of the present invention;

[0022] Figure 3 This is a schematic diagram of the magnetic field distribution of the excitation conductor plate of the present invention;

[0023] Figure 4 This is a schematic diagram of the magnetic field distribution when the excitation coil of the present invention is energized;

[0024] Figure 5 This is a schematic diagram of the magnetic field distribution of the passive control device of the present invention;

[0025] Figure 6 This is a schematic diagram showing the relationship between damping force and velocity in experiments for the passive control device, the active control device, and the damper disclosed herein.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1: Housing; 12: Outer cylindrical connecting end; 2: Rack; 21: Cylindrical section; 3: Transmission device; 31: First rotating rod; 32: First gear; 33: Second gear; 34: Second rotating rod; 35: Third gear; 36: Third rotating rod; 37: Fourth gear; 4: Passive conductor plate; 41: Permanent magnet; 5: Passive control device; 51: Permanent magnet back iron; 52: Ring permanent magnet; 6: Conductor plate; 7: Excitation coil; 8: Active conductor plate back iron. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Please refer to the following first. Figure 1 , Figure 1 This is a schematic diagram of the structure of one embodiment of the bidirectional velocity-type magnetic damper of the present invention. Figure 1 As shown, the bidirectional velocity-type magnetic damper includes a housing 1, a rack 2, a transmission device 3, two passive conductor plates 4, two passive control devices 5, two conductor plates 6, and a magnet assembly.

[0033] like Figure 1 As shown, the rack 2 passes through the housing 1 and can slide vertically relative to the housing 1. Specifically, cylindrical sections 21 can be provided at both ends of the rack 2, and sliding bearings are provided at the upper and lower ends of the housing 1. In the assembled state, the two cylindrical sections 21 are respectively engaged with the inner rings of the two sliding bearings. By providing the cylindrical sections 21 and sliding bearings, the friction between the rack 2 and the housing 1 during sliding can be reduced, and the sliding bearings can also limit the sliding direction of the rack 2.

[0034] A hollow outer cylindrical connecting end 12 can be fixed to the upper end of the aforementioned housing 1. This outer cylindrical connecting end 12 is fastened to the upper end of the aforementioned rack 2 without contacting the rack 2. Those skilled in the art can determine the opening length of the hollow structure inside the outer cylindrical connecting end 12 based on the maximum stroke of the rack 2. This outer cylindrical connecting end 12 can be used to connect buildings, etc.

[0035] It should be noted that, although Figure 1 The damper shown is illustrated using the example of providing vertical damping force, but this is not the only one. The damper can also be rotated to provide horizontal or other angle damping force depending on the actual situation.

[0036] Please refer to the following. Figure 2And continue to refer to Figure 1 , Figure 2 This is a schematic diagram illustrating the structure of one embodiment of the transmission device of the present invention. Figure 2 As shown, the transmission device 3 includes a first rotating rod 31, a second rotating rod 34, and a third rotating rod 36 pivotally connected to the housing 1 from bottom to top. Bearings can be installed at both ends of the first rotating rod 31, the second rotating rod 34, and the third rotating rod 36. Taking the first rotating rod 31 as an example, the inner rings of the two bearings are respectively fitted onto both ends of the first rotating rod 31, and the outer rings of the two bearings are fixed to the inner wall of the housing 1. In this way, the first rotating rod 31 can rotate around its own axis.

[0037] Two passive conductor plates 4 are mounted on the first rotating rod 31. Two passive control devices 5 are mounted on the second rotating rod 34. Two conductor plates 6 are mounted on the third rotating rod 36. Therefore, when the first rotating rod 31, the second rotating rod 34, and the third rotating rod 36 rotate, they can drive the passive conductor plates 4, the passive control devices 5, and the conductor plates 6 to rotate.

[0038] The aforementioned transmission device 3 further includes a first gear 32, a second gear 33, a third gear 35, and a fourth gear 37. In the assembled state, the first gear 32 is fitted onto the middle of the first rotating rod 31, and is positioned opposite the right side of the rack 2. Figure 2 (In the direction of the middle) meshing. Two second gears 33 are sleeved at both ends of the first rotating rod 31. In the working state, as the rack 2 slides, it can drive the first gear 32, the first rotating rod 31 and the second gears 33 to rotate.

[0039] The two third gears 35 are fitted onto both ends of the second rotating rod 34. Each of the two third gears 35 meshes with one of the two second gears 33. In operation, as the second gears 33 rotate, they drive the third gears 35 and the second rotating rod 34 to rotate in the opposite direction to the first rotating rod 31. Simultaneously, because the diameter of the third gears 35 is smaller than that of the second gears 33, the rotational speed of the second rotating rod 34 is greater than that of the first rotating rod 31. This causes the two passive conductor plates 4 to rotate and cut the two passive control devices 5.

[0040] The aforementioned fourth gear 37 is fitted into the middle of the third rotating rod 36, and is positioned on the left side of the aforementioned rack 2. Figure 2 (In the direction of the gear) meshing. In the working state, as the rack 2 slides, it can drive the fourth gear 37 and the third rotating rod 36 to rotate. The rotation direction of the third rotating rod 36 is different from that of the first rotating rod 31, but in the same direction as that of the second rotating rod 34. The size of the fourth gear 37 can be similar to the diameter of the first gear 32, so that the rotational speed of the third rotating rod 36 is less than that of the second rotating rod 34.

[0041] Furthermore, the aforementioned magnet assembly can be installed on the inner wall of the top of the housing 1. In the working state, as the third rotating rod 36 rotates, it can drive the conductor plate 6 to rotate and cut the passive control device 5 and the magnet assembly.

[0042] Specifically, the aforementioned magnet assembly can be a permanent magnet. In this way, the damper achieves a bidirectional velocity-dependent eddy current damper with a sustained control effect. Specifically, because the conductor plate 6 rotates at a relatively low speed, when the passive control device 5 reaches its peak damping force as its speed increases, the damping force exerted on the conductor plate 6 by the magnet assembly has not yet reached its peak. Therefore, this damper can increase the damping force while delaying the occurrence of its peak damping force, thereby extending the control effect.

[0043] The aforementioned magnet assembly can also be an active control device, and the aforementioned conductor plate 6 can be an excitation conductor plate. This enables a bidirectional velocity-type hybrid excitation damper. By adjusting the magnetic field strength through the aforementioned active control device, the energy consumption ratio between active and passive control can be adjusted, thereby improving economic efficiency. Similarly, because the excitation conductor plate (with the same reference numeral as the conductor plate) rotates at a relatively low speed, when the passive control device 5 reaches its peak damping force as the speed increases, the damping force of the excitation coil 7 on the excitation conductor plate has not yet reached its peak. Therefore, this damper can increase the damping force while delaying the occurrence of the peak damping force, thus extending the control effect and compensating for the problem that the damping effect of passive control technology gradually weakens as the vibration speed increases.

[0044] Next, combine Figure 2 , Figure 3 , Figure 4 and Figure 5 Please provide an explanation. Please refer to the previous section. Figure 2 Each passive control device 5 includes two permanent magnet back irons 51 spaced apart, and two annular permanent magnets 52 are arranged opposite each other on the inner side of the two permanent magnet back irons 51, forming a first gap between the two annular permanent magnets 52; in the working state, two excitation conductor plates cut the two first gaps in the two passive control devices 5 one-to-one; the two passive conductor plates 4 rotate one-to-one to cut the two first gaps in the two passive control devices 5. Figure 5 As shown, Figure 5 This is a schematic diagram of the magnetic field distribution of the passive control device 5 of the present invention. It should be noted that, although... Figure 5 In the attached figure, reference numeral 6 refers to a conductor plate, but in this embodiment, the conductor plate is an excitation conductor plate.

[0045] Furthermore, multiple permanent magnets 41 can be fixed around the two passive conductor plates 4, thereby increasing the passive control force of the passive conductor plates 4.

[0046] The aforementioned active control device includes two or more excitation coils 7 and two active conductor plate back irons 8 spaced apart within the two or more excitation coils 7. The excitation coils 7 and adjacent active conductor plate back irons 8 form two second gaps. In operation, the two excitation conductor plates cut into the two second gaps one-to-one. The magnetic field distribution of the excitation conductor plates and excitation coils 7 is as follows: Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the magnetic field distribution of the excitation conductor plate of the present invention. Figure 4 This is a schematic diagram of the magnetic field distribution when the excitation coil 7 of the present invention is energized.

[0047] Furthermore, the aforementioned active control device also includes a current regulator connected to the excitation coil 7, which is used to adjust the current intensity of the excitation coil 7, thereby adjusting the magnetic field intensity of the excitation coil 7.

[0048] Furthermore, the aforementioned active control device also includes a speed sensor for detecting the moving speed of the rack 2. In response to the moving speed of the rack 2 exceeding a preset threshold, the current intensity of the excitation coil 7 is adjusted by the current regulator, thereby adjusting the damping force of the peak damping force of the damper.

[0049] It should be noted that the present invention converts the low-speed translational motion of the rack 2 into a high-speed rotary cutting motion through the transmission device 3. The aforementioned high speed refers to the relative speed of the permanent magnet 41 cutting with the excitation conductor plate and the passive conductor plate 4, which consists of two parts: first, the speed amplified by the rotating device itself; second, the speed superimposed by the relative motion of the permanent magnet 41 with the conductor plates on both sides.

[0050] Please see last. Figure 6 , Figure 6 This diagram illustrates the relationship between damping force and velocity in experiments using a passive control device, an active control device, and the damper disclosed herein. Figure 6As shown, curve A represents the relationship between damping force and rack vibration velocity when only a passive control device is used. It can be seen that at low speeds, the passive control device responds quickly, providing peak damping force. However, the damping effect gradually weakens as the vibration velocity increases. Curve B represents the relationship between damping force and rack vibration velocity when only an active control device is used. Although the peak damping force of the active control device is delayed compared to the passive control device, as mentioned in the background art, the active control device requires a larger amount of external energy. Curve C represents the relationship between damping force and rack vibration velocity when the damper of this invention is used. It is easy to see that the damper of this invention, by combining an active control device and a passive control device, can improve the damping force. By adjusting the current intensity of the excitation coil in the active control device, the magnitude of the damping force can be adjusted, and the energy consumption ratio between active and passive control can be adjusted, thereby making economic benefits practical.

[0051] If curve C represents the relationship between damping force and velocity at maximum energization, then within the energized range, the adjustment range of damping force and velocity should be within the envelope of curves A and C. It can be seen that this invention not only adjusts the peak damping force but also significantly improves its control effect.

[0052] Furthermore, by adjusting the rotational speed of the third rotating rod, the peak damping force of the damper can be adjusted during its occurrence period, thereby prolonging the control effect. For example, the rotational speed of the third rotating rod can be adjusted by changing the size of the third gear.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bidirectional velocity-type magnetic damper, characterized in that, The system includes a housing, a rack movably inserted into the housing, a transmission device, and two passive conductor plates, two passive control devices, two conductor plates, and a magnet assembly disposed within the housing. The transmission device includes a first rotating rod, a second rotating rod, and a third rotating rod pivotally connected from bottom to top within the housing; The magnet assembly is disposed on the upper part of the housing; The passive conductor plate is fitted onto the first rotating rod; the passive control device is fitted onto the second rotating rod; the conductor plate is fitted onto the third rotating rod; The first rotating rod is fitted with a first gear that meshes with the first side of the rack, and the two ends of the first rotating rod are respectively provided with second gears, the first gear being smaller than the second gear; The two ends of the second rotating rod are respectively provided with a third gear that meshes with the two second gears in a one-to-one correspondence. The diameter of the second gear is larger than the diameter of the third gear. The third rotating rod is fitted with a fourth gear that meshes with the second side of the rack; In operation, as the rack slides relative to the housing, the conductor plate rotates and cuts the magnet assembly and the passive control device; the passive conductor plate rotates and cuts the passive control device.

2. The bidirectional velocity-type magnetic damper according to claim 1, characterized in that, The conductor plate is an excitation conductor plate; the magnet assembly is an active control device.

3. The bidirectional velocity-type magnetic damper according to claim 1, characterized in that, Cylindrical sections are fixed at both ends of the rack.

4. The bidirectional velocity-type magnetic damper according to claim 3, characterized in that, The upper and lower ends of the housing are provided with sliding bearings, and the cylindrical section is engaged with the sliding bearings.

5. The bidirectional velocity-type magnetic damper according to claim 1, characterized in that, Rolling bearings are provided at both ends of the first rotating rod, the second rotating rod, and the third rotating rod, and the outer ring of the rolling bearings is fixedly connected to the inner wall of the housing.

6. The bidirectional velocity-type magnetic damper according to claim 1, characterized in that, Each of the passive control devices includes two permanent magnet back irons spaced apart, and two annular permanent magnets are arranged opposite each other on the inner side of the two permanent magnet back irons, forming a first gap between the two annular permanent magnets; in the working state, two conductor plates cut the two first gaps in the two passive control devices one-to-one; The two passive conductor plates rotate and cut the two first gaps in the two passive control devices in a one-to-one correspondence.

7. The bidirectional velocity-type magnetic damper according to claim 2, characterized in that, The active control device includes two or more excitation coils and two active conductor plate back irons spaced apart within the two or more excitation coils. The excitation coils and the adjacent active conductor plate back irons form two second gaps. In the working state, the two excitation conductor plates cut the two second gaps one-to-one.

8. The bidirectional velocity-type magnetic damper according to claim 7, characterized in that, The active control device also includes a current regulator connected to the excitation coil, which is used to adjust the current intensity of the excitation coil.

9. The bidirectional velocity-type magnetic damper according to claim 8, characterized in that, The active control device also includes a speed sensor for detecting the movement speed of the rack, and in response to the movement speed of the rack exceeding a preset threshold, the current intensity of the excitation coil is adjusted by the current regulator to adjust the occurrence period of the peak damping force of the damper.

10. The bidirectional velocity-type magnetic damper according to claim 1, characterized in that, The upper end of the housing is fixed with a hollow outer cylindrical connecting end, which is fastened to the upper end of the rack.

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