CN110566617A - magnetism-rigidity-based non-smooth vibration absorber - Google Patents
magnetism-rigidity-based non-smooth vibration absorber Download PDFInfo
- Publication number
- CN110566617A CN110566617A CN201910875031.4A CN201910875031A CN110566617A CN 110566617 A CN110566617 A CN 110566617A CN 201910875031 A CN201910875031 A CN 201910875031A CN 110566617 A CN110566617 A CN 110566617A
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- Prior art keywords
- compression spring
- mass block
- frame
- vertical compression
- permanent magnets
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Classifications
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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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
- F16F6/005—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid using permanent magnets only
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
the invention provides a magnetic-rigidity-based non-smooth vibration absorber, which relates to the technical field of mechanical vibration absorption and comprises the following components: the device comprises a frame, a vertical compression spring group, a permanent magnet, a mass block, a transverse compression spring and a guide rail; the top and the bottom of the frame are both provided with two permanent magnets; two permanent magnets are arranged at the top and the bottom of the mass block; the mass block is provided with a through hole, and the guide rail penetrates through the through hole; the vertical compression spring group comprises a first vertical compression spring and a second vertical compression spring; the first vertical compression spring is used for connecting the top of the frame with the guide rail; the second vertical compression spring is used for connecting the bottom of the frame with the guide rail; the top and the bottom of the mass block are provided with two permanent magnets, and the permanent magnet arranged on the top of the mass block and the permanent magnet arranged on the top of the frame are mutually repelled; the permanent magnet arranged at the bottom of the mass block and the permanent magnet arranged at the bottom of the frame repel each other. The device provided by the invention can enlarge the effective excitation amplitude range of the vibration absorber.
Description
Technical Field
the invention relates to the technical field of vibration control of mechanical systems, in particular to a magnetic-rigidity-based non-smooth vibration absorber.
Background
The passive pure nonlinear vibration absorber has the characteristic of broadband vibration absorption, and has remarkable advantages in the field of aerospace and the like under the excitation environment with complex frequency components. However, when the excitation amplitude is greatly changed, the pure nonlinear vibration absorber can only have the vibration absorbing effect within a certain excitation range, and beyond the excitation range, the pure nonlinear vibration absorber can fail and even generate side effects. The magnetic-stiffness based non-smooth vibration absorber has the advantage of broadband vibration absorption of the pure non-linear vibration absorber, and has a larger effective excitation range than the pure non-linear vibration absorber due to the combined use of the negative stiffness device, the magnetic device and the positive stiffness elastic device.
in summary, the present invention provides a magnetic-stiffness nonlinear vibration absorber, which is combined with a magnetic device and an elastic device to expand the effective excitation amplitude range of the vibration absorber.
Disclosure of Invention
In view of the above, the present invention provides a magnetic-stiffness based non-smooth vibration absorber to expand the effective excitation amplitude range of the vibration absorber.
the invention provides a magnetic-rigidity-based non-smooth vibration absorber, which comprises: the device comprises a frame, a vertical compression spring group, a permanent magnet, a mass block, a transverse compression spring and a guide rail;
The top and the bottom of the frame are both provided with two permanent magnets;
the top and the bottom of the mass block are provided with two permanent magnets;
the mass block is provided with a through hole, and the guide rail penetrates through the through hole;
The vertical compression spring group comprises a first vertical compression spring and a second vertical compression spring;
one end of the first vertical compression spring is connected with the top of the frame, and the other end of the first vertical compression spring is connected with the guide rail;
one end of the second vertical compression spring is connected with the bottom of the frame, and the other end of the second vertical compression spring is connected with the guide rail;
the top of the mass block is provided with two permanent magnets, and the permanent magnets arranged on the top of the mass block and the permanent magnets arranged on the top of the frame repel each other;
The two permanent magnets are arranged at the bottom of the mass block, and the permanent magnets arranged at the bottom of the mass block and the permanent magnets arranged at the bottom of the frame repel each other.
preferably, the magnetic-rigidity-based non-smooth vibration absorber further comprises a magnet stopper;
the magnet stop block is arranged at one end, far away from the mass block, of the permanent magnet.
preferably, the number of the transverse compression springs is 4;
and the left side and the right side of the mass block are respectively provided with two transverse compression springs.
The embodiment of the invention has the following beneficial effects: the invention provides a magnetic-rigidity-based non-smooth vibration absorber, which comprises: the device comprises a frame, a vertical compression spring group, a permanent magnet, a mass block, a transverse compression spring and a guide rail; the top and the bottom of the frame are both provided with two permanent magnets; two permanent magnets are arranged at the top and the bottom of the mass block; the mass block is provided with a through hole, and the guide rail penetrates through the through hole; the vertical compression spring group comprises a first vertical compression spring and a second vertical compression spring; the first vertical compression spring is used for connecting the top of the frame with the guide rail; the second vertical compression spring is used for connecting the bottom of the frame with the guide rail; the top and the bottom of the mass block are provided with two permanent magnets, and the permanent magnet arranged on the top of the mass block and the permanent magnet arranged on the top of the frame are mutually repelled; the permanent magnet arranged at the bottom of the mass block and the permanent magnet arranged at the bottom of the frame repel each other. The device provided by the invention can enlarge the effective excitation amplitude range of the vibration absorber.
additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
in order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a three-dimensional view of a magnetic-stiffness based non-smooth vibration absorber provided in accordance with an embodiment of the present invention;
Fig. 2 is a front view of a magnetic-stiffness based non-smooth vibration absorber according to an embodiment of the present invention;
Fig. 3 is a three-dimensional view of a magnetic-stiffness based non-smooth vibration absorber according to an embodiment of the invention.
1-a frame; 2, vertically arranging a compression spring set; 3-permanent magnet; 4-magnetic resistance block; 5, a mass block; 6-horizontal compression spring; 7-guide rail.
Detailed Description
to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, when the excitation amplitude is greatly changed, the pure nonlinear vibration absorber can only have a vibration absorbing effect within a certain excitation range, and when the excitation amplitude exceeds the excitation range, the pure nonlinear vibration absorber will lose effectiveness and even generate side effects.
for the understanding of the present embodiment, a detailed description will be given of a magnetic-stiffness based non-smooth vibration absorber disclosed in the present embodiment.
The invention provides a magnetic-rigidity-based non-smooth vibration absorber, which comprises: the device comprises a frame (1), a vertical compression spring set (2), a permanent magnet (3), a mass block (5), a transverse compression spring (6) and a guide rail (7); (ii) a
The top and the bottom of the frame (1) are both provided with two permanent magnets;
the top and the bottom of the mass block (5) are provided with two permanent magnets (3);
The mass block (5) is provided with a through hole, and the guide rail (7) penetrates through the through hole;
the vertical compression spring group (2) comprises a first vertical compression spring and a second vertical compression spring;
one end of the first vertical compression spring is connected with the top of the frame, and the other end of the first vertical compression spring is connected with the guide rail;
specifically, one end of the first vertical compression spring is fixed on the frame, and the other end of the first vertical compression spring is in a free state;
One end of the second vertical compression spring is connected with the bottom of the frame, and the other end of the second vertical compression spring is connected with the guide rail;
Specifically, one end of the second vertical compression spring is fixed on the frame, and the other end of the second vertical compression spring is in a free state;
the top of the mass block (5) is provided with two permanent magnets, and the permanent magnets arranged on the top of the mass block (5) and the permanent magnets arranged on the top of the frame repel each other;
The two permanent magnets are arranged at the bottom of the mass block (5), and the permanent magnets arranged at the bottom of the mass block (5) and the permanent magnets arranged at the bottom of the frame repel each other.
preferably, the magnetic-rigidity-based non-smooth vibration absorber further comprises a magnet block (4);
The magnet stop block (4) is arranged at one end, far away from the mass block (5), of the permanent magnet (3).
Preferably, the number of the transverse compression springs is 4;
And the left side and the right side of the mass block are respectively provided with two transverse compression springs.
The embodiment is described with reference to fig. 1, fig. 2 and fig. 3, and the magnetic-stiffness-based non-smooth vibration absorber of the embodiment mainly comprises a frame (1), a vertical compression spring set (2), a permanent magnet (3), a magnetic resistance stopper (4), a mass block (5), a horizontal compression spring (6) and a guide rail (7).
The frame (1) is made of light alloy with high strength, such as titanium alloy or aluminum alloy, and the frame (1) is fixed on the system to be damped in a bolt connection mode and the like; the vertical compression spring (2) is fixedly connected to the frame (1) through a connecting seat and is in a free extension state, and a stop block is arranged at the free end of the vertical compression spring; the permanent magnet (3) is provided with a through hole, is fixed on the frame (1) and the mass block (5) by bolts, comprises four pairs of permanent magnets (3), has the same magnetism on the outward facing surface of the permanent magnets arranged on the frame (1) and the mass block (5), and is provided with a magnetic resistance stop block (4) on the side surface; a connecting seat and a threaded hole are processed on the mass block (5) and are respectively used for connecting the transverse compression spring (6) and the permanent magnet (3), and the mass block (5) can slide on the guide rail (7) to form a friction pair with the guide rail to dissipate vibration energy; the transverse compression spring (6) is arranged on the frame (1) through one end of the connecting seat, and the other end of the transverse compression spring is connected to the mass block (5) and is in a compressed state when not vibrating; the guide rail (7) is fixed at the center of the frame, and forms a friction pair with the inner surface of the mass block after the surface is coated;
when the vibration energy of the system to be damped is transmitted to the vibration absorber, the mass block (5) performs friction sliding along the guide rail (7), and a friction pair formed by the mass block and the coating layer generates friction dissipation energy; the transverse compression spring (6) can generate negative linear stiffness and cubic nonlinear stiffness, and the permanent magnet (3) can generate positive linear stiffness and cubic nonlinear stiffness; the positive and negative linear stiffness between the transverse compression spring (6) and the permanent magnet (3) are mutually offset, and pure cubic nonlinear stiffness is constructed in the motion direction of the mass block (5), so that the absorber has broadband vibration absorption capacity; when the amplitude of the mass block is increased to a certain degree, the mass block is separated from the action area of the magnetic device and elastically collides with the vertical compression spring group (2) with positive linear stiffness, the negative linear stiffness generated by the horizontal compression spring (6) is offset by the positive linear stiffness generated by the vertical compression spring group (2), the whole vibration absorber still has pure nonlinear stiffness, but the stiffness coefficient is reduced, so that the vibration absorber is ensured not to suddenly lose efficacy, and the vibration absorbing effect is kept in a larger excitation range.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A magnetic-stiffness based non-smooth vibration absorber, comprising: the device comprises a frame, a vertical compression spring group, a permanent magnet, a mass block, a transverse compression spring and a guide rail;
the top and the bottom of the frame are both provided with two permanent magnets;
the top and the bottom of the mass block are provided with two permanent magnets;
The mass block is provided with a through hole, and the guide rail penetrates through the through hole;
The vertical compression spring group comprises a first vertical compression spring and a second vertical compression spring;
One end of the first vertical compression spring is connected with the top of the frame, and the other end of the first vertical compression spring is connected with the guide rail;
One end of the second vertical compression spring is connected with the bottom of the frame, and the other end of the second vertical compression spring is connected with the guide rail;
the top of the mass block is provided with two permanent magnets, and the permanent magnets arranged on the top of the mass block and the permanent magnets arranged on the top of the frame repel each other;
the two permanent magnets are arranged at the bottom of the mass block, and the permanent magnets arranged at the bottom of the mass block and the permanent magnets arranged at the bottom of the frame repel each other.
2. the base magneto-stiffness-based non-smooth vibration absorber according to claim 1, further comprising a magnet stop;
the magnet stop block is arranged at one end, far away from the mass block, of the permanent magnet.
3. the base magnetic-stiffness-based non-smooth vibration absorber according to claim 1, wherein the number of the lateral compression springs is 4;
And the left side and the right side of the mass block are respectively provided with two transverse compression springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875031.4A CN110566617A (en) | 2019-09-17 | 2019-09-17 | magnetism-rigidity-based non-smooth vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875031.4A CN110566617A (en) | 2019-09-17 | 2019-09-17 | magnetism-rigidity-based non-smooth vibration absorber |
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| CN110566617A true CN110566617A (en) | 2019-12-13 |
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| CN201910875031.4A Pending CN110566617A (en) | 2019-09-17 | 2019-09-17 | magnetism-rigidity-based non-smooth vibration absorber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111620220A (en) * | 2020-01-22 | 2020-09-04 | 上海三菱电梯有限公司 | Vibration damping device and elevator device |
| CN111734776A (en) * | 2020-06-29 | 2020-10-02 | 哈尔滨工业大学 | Three-degree-of-freedom low-frequency vibration isolator based on parallel connection of horizontal pre-pressing spring and magnetic spring |
| CN112049579A (en) * | 2020-10-20 | 2020-12-08 | 中国石油集团渤海钻探工程有限公司 | Damping balance shock-suppression drilling tool |
| CN112227978A (en) * | 2020-10-20 | 2021-01-15 | 中国石油集团渤海钻探工程有限公司 | Magnetic repulsion damping drilling tool |
| CN112554096A (en) * | 2020-12-10 | 2021-03-26 | 中国人民解放军火箭军工程大学 | Negative rigidity type self-adaptive energy storage impact-resistant column |
| CN112555320A (en) * | 2020-12-08 | 2021-03-26 | 中国民航大学 | Segmented smooth bistable negative-stiffness vibration absorber based on permanent magnet and compression spring assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111734776A (en) * | 2020-06-29 | 2020-10-02 | 哈尔滨工业大学 | Three-degree-of-freedom low-frequency vibration isolator based on parallel connection of horizontal pre-pressing spring and magnetic spring |
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| CN112227978A (en) * | 2020-10-20 | 2021-01-15 | 中国石油集团渤海钻探工程有限公司 | Magnetic repulsion damping drilling tool |
| CN112227978B (en) * | 2020-10-20 | 2022-05-13 | 中国石油集团渤海钻探工程有限公司 | Magnetic repulsion damping drilling tool |
| CN112555320A (en) * | 2020-12-08 | 2021-03-26 | 中国民航大学 | Segmented smooth bistable negative-stiffness vibration absorber based on permanent magnet and compression spring assembly |
| CN112554096A (en) * | 2020-12-10 | 2021-03-26 | 中国人民解放军火箭军工程大学 | Negative rigidity type self-adaptive energy storage impact-resistant column |
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