A low-frequency vibration suppression device

Abstract

A low-frequency vibration suppression device comprises at least one vibration suppression unit, which can be installed at any position on an external component, each of the vibration suppression units comprising a frame part, a mass block and at least one elastic part; the frame part is used to be installed on the external component to absorb the vibration on the external component; the elastic part is used to connect the frame part and the mass block, and can transmit the vibration absorbed by the frame part to the mass block; and the mass block is suspended in the inner cavity of the frame part through the elastic part. The present disclosure can install multiple vibration suppression units on the external component through the frame part, and the low-frequency vibration on the external component can be transmitted to the mass block through the frame part and the elastic part. The low-frequency vibration of the external component can be absorbed by the multiple vibration suppression units. The more the vibration suppression units are, the better the low-frequency noise of lower frequency can be absorbed. The vibration energy absorbed can be eliminated through friction and internal friction of the structure.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of vibration suppression, and particularly relates to a low-frequency vibration suppression device. BACKGROUND

[0002] With the development of industry and science and technology, power machinery and electronic equipment are more and more widely used. Any mechanical equipment will generate vibration when it operates. The traditional vibration isolation method usually has good vibration isolation effect on high-frequency vibration.

[0003] The traditional passive vibration isolation of equipment is mainly used for isolating medium and high-frequency vibration, and low-frequency vibration is also transmitted to the power machinery or electronic equipment. SUMMARY

[0004] In order to solve at least one of the above technical problems, the purpose of the present disclosure is to provide a low-frequency vibration suppression device which can absorb and eliminate low-frequency vibration.

[0005] In order to achieve the purpose of the present disclosure, the technical solution adopted by the present disclosure is as follows:

[0006] A low-frequency vibration suppression device comprises at least one vibration suppression unit, each of which comprises:

[0007] a frame part for mounting on an external part to absorb vibration on the external part;

[0008] at least one elastic part for connecting the frame part and the mass block, which can transmit the vibration absorbed by the frame part to the mass block;

[0009] a mass block, which is suspended in the inner cavity of the frame part by the elastic part.

[0010] Optionally, a plurality of frame parts are arranged in an array structure.

[0011] Optionally, the frame part has a rectangular structure, and a plurality of frame parts are an integral structure.

[0012] Optionally, a plurality of elastic parts are arranged in a circular array around the mass block.

[0013] Optionally, the elastic part is a spring or an elastic beam structure.

[0014] Optionally, the elastic part is a bent beam structure, which comprises a first connecting part, a second connecting part and at least one bending part, the first connecting part is connected with the second connecting part through the at least one bending part, the first connecting part is further connected with the mass block, and the second connecting part is connected with the frame part.

[0015] Optionally, the bending part comprises a first longitudinal piece, a second longitudinal piece, a third longitudinal piece, a first horizontal piece and a second horizontal piece.

[0016] The first connecting part is connected with the second connecting part in sequence through the first longitudinal piece, the first horizontal piece, the second longitudinal piece, the second horizontal piece and the third longitudinal piece.

[0017] Optionally, the elastic part is provided with a plurality of pairs of,

[0018] The same pair of elastic parts on both sides of the mass block have the same structure.

[0019] Optionally, the elastic part is provided with a plurality of pairs of,

[0020] The same pair of elastic parts on both sides of the mass block are mirror-symmetric structures.

[0021] Optionally, the mass block is arranged at the central position of the inner cavity of the frame part.

[0022] The present disclosure can install a plurality of vibration suppression units on the external part through the frame part. The low-frequency vibration on the external part is transmitted to the mass block through the frame part and the elastic part. The low-frequency vibration of the external part can be absorbed by the plurality of vibration suppression units. The more the vibration suppression units, the better the absorption of low-frequency noise. The absorbed vibration energy can be eliminated through friction and internal friction.

[0023] The technical solution of the present disclosure has the advantages of absorbing and eliminating low-frequency vibration, improving the control ability of line spectrum vibration, and reducing the vibration transmission of the device to the base. The superstructure has a simple structure, is easy to prepare, is convenient to install, and has a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description, explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0025] Figure 1 is a structural schematic diagram of a use state of a low-frequency vibration suppression device of the present disclosure.

[0026] Figure 2 is a structural schematic diagram of a vibration suppression unit in Embodiment Two of the present disclosure.

[0027] Figure 3 is a structural schematic diagram of an elastic part and a mass block in Embodiment Two of the present disclosure.

[0028] Figure 4 is a structural schematic diagram of a vibration suppression unit in Embodiment Three of the present disclosure.

[0029] Figure 5is a structural schematic diagram of the elastic part and the mass block in Embodiment Three of the present disclosure.

[0030] Figure 6 is a vibration frequency-noise decibel diagram of the low-frequency vibration suppression device of the present disclosure. DETAILED DESCRIPTION

[0031] The present disclosure will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related content, and not to limit the present disclosure. In addition, it should be noted that only parts related to the present disclosure are shown in the drawings for ease of description.

[0032] It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. The present disclosure will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] The low-frequency vibration suppression device and bearing oil supply device provided by the present disclosure can reduce the amount of lubricating oil and power loss, and can greatly improve the overall lubrication and cooling effect of the bearing, meeting the safe and reliable operation of the bearing in a high DN value use scenario.

[0034] Embodiment One

[0035] As shown in Figure 1 , Figure 2 , Figure 4 The present disclosure provides a low-frequency vibration suppression device, at least one vibration suppression unit can be installed at any position of an external component, and can absorb and reduce low-frequency vibration on the external component B. The low-frequency vibration suppression device comprises at least one vibration suppression unit A, and each vibration suppression unit A comprises a frame part 1, a mass block 3, and at least one elastic part 2: wherein,

[0036] The frame part 1 is used to be installed on the external component B to absorb vibration on the external component B. The frame part 1 can be a rectangular structure, which is convenient for arrangement and installation on the external component B. The frame part 1 can be provided in a special-shaped structure according to the shape of the surface of the external component B, which is convenient for inlaying in the groove outside the external component B, and the overall appearance is smooth and beautiful. The frame part 1 can also be in a cylindrical, circular, or triangular pyramid shape, which does not affect the implementation of the present disclosure. The frame part 1 can be a structure with openings on the upper and lower sides to save materials. The frame part 1 can also be a closed structure with an overall beautiful appearance. The frame parts 1 on multiple vibration suppression units A can be an integral structure, which is convenient for overall installation on the external component B and overall absorption of vibration. The frame parts 1 on multiple vibration suppression units A can also be separate frame structures, which are convenient for free combination of the overall size. The frame part 1 can be a metal structure or a plastic structure. The connection between the frame part 1 and the external component B can be achieved by screwing, welding, or bonding.

[0037] The elastic part 2 is used to connect the frame part 1 and the mass block 3, and can transmit the vibration absorbed by the frame part 1 to the mass block 3; the elastic part 2 can be a spring, an elastic beam structure or other elastic structures. The elastic part 2 can be provided in multiple pairs and symmetrically arranged around the mass block 3 to connect the mass block 3 and the frame part 1. The multiple elastic parts 2 can be uniformly arranged around the mass block 3, or non-uniformly arranged around the mass block 3, or circumferentially arranged around the mass block 3; for example, when the elastic part 2 has two, it is distributed on the left and right sides, or on the upper and lower sides, or on the front and back sides, etc.; for another example, when the elastic part 2 has three, it is uniformly distributed around the mass block 3 along the horizontal plane or the vertical plane, or uniformly distributed in the three-dimensional space with the mass block 3 as the center; for another example, when the elastic part 3 has four, it can be distributed in four directions in the horizontal plane or the vertical plane, or uniformly distributed in the three-dimensional space with the mass block 3 as the center; when the elastic part 2 is provided in other quantities, it can also be uniformly or non-uniformly arranged around the mass block 3. By providing elastic parts with different elasticities, the ability of the vibration suppression unit A to absorb vibrations of different frequencies can be adjusted.

[0038] The mass block 3 can absorb the external component B, and finally eliminate the vibration through mechanical loss or air friction, etc. The mass block 3 is suspended in the inner cavity of the frame part 1 through the elastic part 2. The suspended mass block 3 has a vibration activity space and tries not to collide with the frame part 1 to cause noise. The mass block 3 only needs to have a certain mass to absorb vibration, and is preferably rectangular, spherical, etc. for easy manufacturing and processing.

[0039] When multiple vibration suppression units A are provided, the vibration suppression units A can be arbitrarily installed on the external component B, or can be arranged in an array structure. For example, multiple vibration suppression units A can be arranged in a straight line on the external component B; for another example, multiple vibration suppression units A can be installed on the external component B in a rectangular array; for another example, multiple vibration suppression units A can be installed on the external component B in a circumferential array; multiple vibration suppression units A can be freely arranged according to needs to absorb the vibration on the external component B.

[0040] When the surface of the external component B is flat, multiple vibration suppression units A can be directly installed on the flat surface of the external component B; when the surface of the external component B has a recessed position, multiple vibration suppression units A can be embedded in the recessed position of the external component B; when the inner cavity of the external component B has a suitable accommodating space, multiple vibration suppression units A can also be directly installed in the inner cavity of the external component B, all of which can absorb vibration.

[0041] The external component B can be a power mechanical device, a power transmission device, an electronic device, etc.

[0042] The present disclosure can install multiple vibration suppression units on the external component through the frame part, and the low-frequency vibration on the external component can be transmitted to the mass block through the frame part and the elastic part. The low-frequency vibration of the external component can be absorbed by the multiple vibration suppression units. The more the vibration suppression units, the better the absorption of low-frequency noise. The absorbed vibration energy can be eliminated through friction and internal friction of the structure.

[0043] Embodiment two

[0044] In a preferred embodiment, referring to Figure 2 、 Figure 3 , the elastic part 2 is provided with multiple pairs, which can be symmetrically arranged around the mass block 3. The same pair of elastic parts 2 on both sides of the mass block 3 are mirror images of each other. The same pair of elastic parts 2 has a symmetric force model on the mass block 2, and the movement trajectory of the mass block 2 is relatively easy to calculate when it is subjected to vibration.

[0045] In this embodiment, the elastic part 2 is a bent beam structure, including a first connecting part 21, a second connecting part 23, and at least one bending part 22. The first connecting part is used to connect the frame part 1, and the second connecting part is used to connect the mass block 3. The first connecting part 21 is connected to the second connecting part 23 through at least one bending part 22. The first connecting part 21 is also connected to the mass block 3, and the second connecting part 23 is connected to the frame part 1. The first connecting part 21 and the second connecting part 23 can be installed at the middle positions of the frame part 1 and the mass block 3, respectively. The first connecting part 21 and the second connecting part 23 can be plate members or rod members. The bending part 22 has elasticity. When the vibration suppression unit A vibrates, the bending part 22 bends, allowing the mass block 3 and the bending part 22 to absorb vibration energy. During the vibration process, the vibration is eliminated through mechanical loss, air friction, and reverse vibration. The first connecting part 21 and the second connecting part 23 have the same height, which can reduce the overturning moment when the mass block 3 vibrates.

[0046] In one embodiment, the bending part 22 includes a first longitudinal plate 221, a second longitudinal plate 223, a third longitudinal plate 225, a first transverse plate 222, and a second transverse plate 224. The first connecting part 21 is connected to the second connecting part 23 through the first longitudinal plate 221, the first transverse plate 222, the second longitudinal plate 223, the second transverse plate 224, and the third longitudinal plate 225 in sequence. More longitudinal plates and transverse plates can be combined to form multiple bending parts 22. The transverse plates and the longitudinal plates can be connected through right-angle connections or circular-arc plate connections, which can have elastic effects. Preferably, the first transverse plate 222 and the second transverse plate 224 have the same shape, and the first longitudinal plate 221 and the third longitudinal plate 225 are half of the second longitudinal plate 223. The bending part 22 has a central symmetry structure, and the force is evenly distributed in all directions when it vibrates, which is not easy to damage after long-time vibration.

[0047] Since each external component B has a main vibration frequency when working, the number and size of each position of the vibration suppression unit A can be set according to the main vibration frequency. In a specific embodiment, the vibration suppression unit A is made of iron or steel, the frame part 1 is a square frame with a length of 80-120 mm and a wall thickness of 2-3 mm, the mass block 3 is a square with a side length of 28-32 mm, the first connecting part 21, the first longitudinal plate 221, the first transverse plate 222, the second longitudinal plate 223, the second transverse plate 224, the third longitudinal plate 225, and the second connecting part 23 are all rectangular plate bodies with the same length as the mass block 3, the first connecting part 21, the first transverse plate 222, the second transverse plate 224, and the second connecting part 23 have a width of 6-10 mm, the first longitudinal plate 221 and the third longitudinal plate 225 have a height of 14-15 mm, the second longitudinal plate 223 has a height of 28-30 mm, and the first connecting part 21, the first longitudinal plate 221, the first transverse plate 222, the second longitudinal plate 223, the second transverse plate 224, the third longitudinal plate 225, and the second connecting part 23 have a thickness of 0.6-1 mm, which has a good vibration suppression effect on low-frequency line spectrum.

[0048] In a preferred embodiment of the present embodiment, the frame part 1 has a length of 100 mm, a wall thickness of 2.5 mm, and a mass block with a side length of 30 mm, the first connecting part 21, the first longitudinal plate 221, the first transverse plate 222, the second longitudinal plate 223, the second transverse plate 224, the third longitudinal plate 225, and the second connecting part 23 are all rectangular plate bodies with the same length as the mass block 3, the first connecting part 21, the first transverse plate 222, the second transverse plate 224, and the second connecting part 23 have a width of 8 mm, the first longitudinal plate 221 and the third longitudinal plate 225 have a height of 14.6 mm, the second longitudinal plate 223 has a height of 29.2 mm, and the first connecting part 21, the first longitudinal plate 221, the first transverse plate 222, the second longitudinal plate 223, the second transverse plate 224, the third longitudinal plate 225, and the second connecting part 23 have a thickness of 0.8 mm, which improves the vibration isolation effect of the 251 Hz line spectrum by at least 20 dB (34.485-11.6002), as shown in Figure 6

[0049] The device mainly concentrates vibration energy on low-frequency line spectrum after traditional passive vibration isolation measures. By designing a sub-wavelength structure, the overall structure has excellent dynamic performance, thereby producing a good suppression effect on low-frequency line spectrum.

[0050] Embodiment Three

[0051] In another preferred embodiment, referring to Figure 4 Figure 5 ​​As shown, the elastic part 2 is provided with multiple pairs, the structure of the elastic part 2 on the same side of the mass block 3 is the same, that is, the structure of the elastic part 2 on the two sides of the mass block 3 is the same in spatial position, so that the mass block 3 will be subjected to a certain overturning torque when vibrating, and more vibration energy can be absorbed. The technical scheme of the present disclosure can also use the specific structure size of the third embodiment, and can also achieve the ability to suppress low-frequency vibration.

[0052] The technical scheme of the present disclosure has the advantages of absorbing and eliminating low-frequency vibration, improving the control ability of line spectrum vibration, and reducing the vibration transmission of the device to the base. The superstructure has a simple structure, is easy to prepare, is convenient to install, and has a wide range of applications.

[0053] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.

[0054] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0055] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and not to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A low-frequency vibration suppression device, characterized in that, It includes at least one vibration damping unit, and each vibration damping unit includes: The frame section is used for mounting on external components to absorb vibrations from the external components. At least one elastic part is provided for connecting the frame part and the mass block, which is capable of transmitting the vibration absorbed by the frame part to the mass block; A mass block, which is suspended in the cavity of the frame portion by the elastic part; Multiple elastic portions are circumferentially arranged around the mass block; The elastic part is a bent beam structure, including a first connecting part, a second connecting part and at least one bent part. The first connecting part is connected to the second connecting part through at least one bent part. The first connecting part is also connected to the mass block. The second connecting part is connected to the frame part. The curved portion includes a first longitudinal piece, a second longitudinal piece, a third longitudinal piece, a first transverse piece, and a second transverse piece; The first connecting part is connected to the second connecting part after passing through the first longitudinal piece, the first transverse piece, the second longitudinal piece, the second transverse piece, and the third longitudinal piece in sequence; Both the first connecting part and the second connecting part are plate parts. The bent part is elastic. The horizontal and vertical plates are connected by right angles or by arc plates, which can play an elastic role.

2. The low-frequency vibration suppression device as described in claim 1, characterized in that: Multiple frame sections are arranged sequentially to form an array structure.

3. The low-frequency vibration suppression device as described in claim 2, characterized in that: The frame portion has a rectangular shape, and the multiple frame portions are an integral structure.

4. The low-frequency vibration suppression device as described in claim 1, characterized in that: The elastic part is a bent beam structure, including a first connecting part, a second connecting part and at least one bent part. The first connecting part is connected to the second connecting part through at least one of the bent parts. The first connecting part is also connected to the mass block. The second connecting part is connected to the frame part.

5. The low-frequency vibration suppression device according to any one of claims 1-4, characterized in that: The elastic part is provided in multiple pairs. The same pair of elastic parts on both sides of the mass block have the same structure.

6. The low-frequency vibration suppression device according to any one of claims 1-4, characterized in that: The elastic part is provided in multiple pairs. The same pair of elastic parts on both sides of the mass block are symmetrical about each other.

7. The low-frequency vibration suppression device as described in claim 1, characterized in that: The mass block is positioned in the center of the inner cavity of the frame section.

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