Frequency modulation damper for double-layer steel chimney

Abstract

The invention relates to a frequency modulation damper for a double-layer steel chimney, which comprises an inner cylinder, an outer cylinder, a frequency modulation mass block, a spring and a damper, the inner cylinder and the outer cylinder are coaxially arranged, the frequency modulation mass block is arranged between the inner cylinder and the outer cylinder, the spring is connected between the inner cylinder and the frequency modulation mass block, and the damper is connected between the outer cylinder and the frequency modulation mass block. The damper is simple in structure and convenient to install and maintain, the practicability of the damper is improved, meanwhile, the damping parameters of the damper can be adjusted according to the function of the vibration frequency of the steel chimney, and then the stability of the damping effect of the damper is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of chimney dampers, in particular to a frequency modulation damper for a double-layer steel chimney. Background Art

[0002] With the development of industry, more and more tall structures such as chimneys and towers are widely used. These structures are prone to vibration under wind loads, affecting their safety and stability. In order to control the vibration of the structure, dampers are usually used to consume energy and reduce the vibration amplitude.

[0003] In the related technology, although there are hydraulic dampers, friction dampers and viscoelastic dampers, these dampers are difficult to install and maintain, need to be operated at high altitudes, the damping effect is greatly affected by factors such as ambient temperature and wind speed, and have poor stability. Therefore, the present invention provides a frequency-modulated damper for a double-layer steel chimney. Summary of the invention

[0004] In order to solve the problems in the above background technology, the present invention provides a frequency modulation damper for a double-layer steel chimney.

[0005] The present invention provides a frequency modulation damper for a double-layer steel chimney, which adopts the following technical solution:

[0006] A frequency-modulating damper for a double-layer steel chimney comprises an inner tube, an outer tube, a frequency-modulating mass block, a spring and a damper. The inner tube and the outer tube are coaxially arranged, the frequency-modulating mass block is arranged between the inner tube and the outer tube, the spring is connected between the inner tube and the frequency-modulating mass block, and the damper is connected between the outer tube and the frequency-modulating mass block.

[0007] By adopting the above-mentioned technical scheme, that is, by setting the frequency-modulated damper for the double-layer steel chimney provided by the present invention, it is beneficial to reduce the noise and vibration of the chimney structure, and thus is beneficial to improving the comfort and safety of the overall structure. At the same time, by setting the frequency-modulated mass block, it can absorb and consume the energy generated by environmental changes, and thus is beneficial to ensuring the main body of the double-layer steel chimney, that is, it is beneficial to the service life of the double-layer steel chimney provided by the present invention.

[0008] Preferably, a guide device is provided between the inner cylinder and the outer cylinder, and the guide device is used to limit the movement direction of the frequency-modulating mass block so that it can only move along the axial direction of the inner cylinder and the outer cylinder.

[0009] By adopting the above technical solution and arranging the guide device between the inner tube and the outer tube, it is beneficial to enable the movement of the frequency-modulating mass block along a predetermined axial direction, thereby helping to improve the movement function accuracy of the frequency-modulating mass block, thereby helping to ensure the frequency-modulating damper for a double-layer steel chimney provided by the present invention, and at the same time, it is also beneficial to improve the stability of the device, thereby helping to improve the practicability and creativity of the device.

[0010] Preferably, a frequency modulation device is provided on the frequency modulation mass block, and the frequency modulation device is used to adjust the mass and stiffness of the frequency modulation mass block, thereby changing the damping parameters of the damper.

[0011] By adopting the above-mentioned technical scheme, it is beneficial to improve the practicality of the present invention and the adaptability of the present invention. That is, the mass and stiffness of the mass block can be adjusted according to the actual working conditions through the frequency modulation device, so that the frequency modulation damper for a double-layer steel chimney provided by the present invention can adapt to different working environments, and the performance of the damper provided by the present invention can also be optimized.

[0012] Preferably, the number of the springs and dampers is multiple and evenly distributed between the inner cylinder and the outer cylinder.

[0013] The adoption of the above technical solution is conducive to ensuring the stability of the present invention, achieving a uniform shock-absorbing effect, and also conducive to avoiding errors during the installation process, thereby helping to increase the service life of the present invention.

[0014] Preferably, the frequency modulation device is an electromagnetic frequency modulation device, which adjusts the mass and stiffness of the frequency modulation mass block by changing the intensity of the electromagnetic field.

[0015] By adopting the above technical scheme, it is beneficial to achieve precise control and rapid response of a frequency-modulated damper for a double-layer steel structure provided by the present invention, and it is also beneficial to integrate the damper provided by the present invention with other systems, thereby improving the practicality of the present invention.

[0016] Furthermore, the frequency modulation device adopts a mechanical frequency modulation device, and its mass and stiffness are adjusted by changing the position of the frequency modulation mass block.

[0017] The adoption of the above technical solution is beneficial to improving the performance and adaptability of frequency modulation, and is beneficial to ensuring the safety of the present invention.

[0018] Furthermore, the damper is a viscoelastic damper, which consumes energy through deformation of viscoelastic materials.

[0019] By adopting the above technical solution, the vibration energy can be better absorbed and dissipated, the response of the structure can be reduced, and then the vibration amplitude of the structure can be reduced, thereby improving the safety of the steel chimney.

[0020] Furthermore, the damper is a hydraulic damper that consumes energy through the flow of liquid.

[0021] By adopting the above technical solution, it is beneficial to achieve the effect of shock absorption and noise reduction, and further beneficial to ensure the environmental safety of the damper provided by the present invention during use, which is beneficial to the use of the damper provided by the present invention.

[0022] Furthermore, the damper adopts a friction damper, which consumes energy through the friction between friction plates.

[0023] By adopting the above technical solution, the damper provided by the present invention has good durability, thereby reducing the frequency of maintenance and replacement, thereby reducing costs and improving the practicality of the present invention.

[0024] Furthermore, the inner cylinder and the outer cylinder are made of steel.

[0025] By adopting the above technical solution, it is beneficial to manufacture the device, and further beneficial to improve the practicability of the device.

[0026] In summary, the present invention has the following beneficial technical effects:

[0027] 1. The structure is simple, and installation and maintenance are convenient. Operations can be carried out at low altitudes, which reduces construction difficulty and risk, thereby helping to improve the practicability of the present invention.

[0028] 2. The frequency modulation technology can automatically adjust the damping parameters of the damper according to the vibration frequency of the steel chimney, thereby improving the stability and reliability of the damping effect.

[0029] 3. The damper has a wide frequency response range and can effectively control the broadband vibration of the steel chimney under wind load. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0031] Explanation of the reference numerals: 1. inner cylinder; 2. outer cylinder; 3. frequency-modulating mass block; 4. spring; 5. damper; 6. guide device; 7. frequency-modulating device. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The following is combined with Figure 1 The present invention is described in further detail.

[0034] Embodiment 1:

[0035] A frequency-modulating damper for a double-layer steel chimney comprises an inner tube 1, an outer tube 2, a frequency-modulating mass block 3, a spring 4 and a damper 5. The inner tube 1 and the outer tube 2 are coaxially arranged, the frequency-modulating mass block 3 is arranged between the inner tube 1 and the outer tube 2, the spring 4 is connected between the inner tube 1 and the frequency-modulating mass block 3, and the damper 5 is connected between the outer tube 2 and the frequency-modulating mass block 3.

[0036] A guide device 6 is provided between the inner cylinder 1 and the outer cylinder 2 , and the guide device 6 is used to limit the movement direction of the frequency-modulating mass block 3 so that it can only move along the axial direction of the inner cylinder 1 and the outer cylinder 2 .

[0037] The frequency modulation mass block 3 is provided with a frequency modulation device 7, and the frequency modulation device 7 is used to adjust the mass and stiffness of the frequency modulation mass block 3, so as to change the damping parameters of the damper.

[0038] The springs 4 and dampers 5 are both plural in number and are evenly distributed between the inner tube 1 and the outer tube 2 .

[0039] Embodiment 2:

[0040] A frequency-modulating damper for a double-layer steel chimney comprises an inner tube 1, an outer tube 2, a frequency-modulating mass block 3, a spring 4 and a damper 5. The inner tube 1 and the outer tube 2 are coaxially arranged, the frequency-modulating mass block 3 is arranged between the inner tube 1 and the outer tube 2, the spring 4 is connected between the inner tube 1 and the frequency-modulating mass block 3, and the damper 5 is connected between the outer tube 2 and the frequency-modulating mass block 3.

[0041] A guide device 6 is provided between the inner cylinder 1 and the outer cylinder 2 , and the guide device 6 is used to limit the movement direction of the frequency-modulating mass block 3 so that it can only move along the axial direction of the inner cylinder 1 and the outer cylinder 2 .

[0042] The frequency modulation mass block 3 is provided with a frequency modulation device 7, and the frequency modulation device 7 is used to adjust the mass and stiffness of the frequency modulation mass block 3, so as to change the damping parameters of the damper.

[0043] The springs 4 and dampers 5 are both plural in number and are evenly distributed between the inner tube 1 and the outer tube 2 .

[0044] Different from the first embodiment, the frequency modulation device 7 in the present embodiment adopts an electromagnetic frequency modulation device, which adjusts the mass and stiffness of the frequency modulation mass block 3 by changing the intensity of the electromagnetic field.

[0045] Embodiment 3:

[0046] A frequency-modulating damper for a double-layer steel chimney comprises an inner tube 1, an outer tube 2, a frequency-modulating mass block 3, a spring 4 and a damper 5. The inner tube 1 and the outer tube 2 are coaxially arranged, the frequency-modulating mass block 3 is arranged between the inner tube 1 and the outer tube 2, the spring 4 is connected between the inner tube 1 and the frequency-modulating mass block 3, and the damper 5 is connected between the outer tube 2 and the frequency-modulating mass block 3.

[0047] A guide device 6 is provided between the inner cylinder 1 and the outer cylinder 2 , and the guide device 6 is used to limit the movement direction of the frequency-modulating mass block 3 so that it can only move along the axial direction of the inner cylinder 1 and the outer cylinder 2 .

[0048] The frequency modulation mass block 3 is provided with a frequency modulation device 7, and the frequency modulation device 7 is used to adjust the mass and stiffness of the frequency modulation mass block 3, so as to change the damping parameters of the damper.

[0049] The springs 4 and dampers 5 are both plural in number and are evenly distributed between the inner tube 1 and the outer tube 2 .

[0050] Different from the first and second embodiments, the damper 5 in the present embodiment adopts a viscoelastic damper, which consumes energy through the deformation of the viscoelastic material and has a good damping effect.

[0051] The working principle of the present invention is as follows:

[0052] When a steel chimney vibrates under wind load, the relative movement between the inner and outer cylinders causes the spring and damper to deform, thereby consuming energy and reducing the vibration amplitude. At the same time, the movement of the frequency-modulated mass block will also generate inertial force, further consuming energy. By adjusting the mass and stiffness of the frequency-modulated mass block, the damping parameters of the damper can be changed so that it can play a better damping effect at different vibration frequencies.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A frequency modulation damper (5) for a double-layer steel chimney, characterized in that: The invention comprises an inner cylinder (1), an outer cylinder (2), a frequency-modulating mass block (3), a spring (4) and a damper (5); the inner cylinder (1) and the outer cylinder (2) are coaxially arranged; the frequency-modulating mass block (3) is arranged between the inner cylinder (1) and the outer cylinder (2); the spring (4) is connected between the inner cylinder (1) and the frequency-modulating mass block (3); and the damper (5) is connected between the outer cylinder (2) and the frequency-modulating mass block (3).

2. The frequency modulation damper (5) for a double-layer steel chimney according to claim 1 is characterized in that: A guide device (6) is provided between the inner cylinder (1) and the outer cylinder (2), and the guide device (6) is used to limit the movement direction of the frequency modulation mass block (3) so that it can only move along the axial direction of the inner cylinder (1) and the outer cylinder (2).

3. The frequency modulation damper (5) for a double-layer steel chimney according to claim 1, characterized in that: The frequency modulation mass block (3) is provided with a frequency modulation device (7), and the frequency modulation device (7) is used to adjust the mass and stiffness of the frequency modulation mass block (3), thereby changing the damping parameters of the damper (5).

4. The frequency modulation damper (5) for a double-layer steel chimney according to claim 1, characterized in that: The springs (4) and dampers (5) are both in plural numbers and are evenly distributed between the inner tube (1) and the outer tube (2).

5. The frequency modulation damper (5) for a double-layer steel chimney according to claim 3 is characterized in that: The frequency modulation device (7) is an electromagnetic frequency modulation device (7) which adjusts the mass and rigidity of the frequency modulation mass block (3) by changing the intensity of the electromagnetic field.

6. The frequency modulation damper (5) for a double-layer steel chimney according to claim 3 is characterized in that: The frequency modulation device (7) adopts a mechanical frequency modulation device (7), and adjusts the mass and rigidity of the frequency modulation mass block (3) by changing the position of the mass block (3).

7. The frequency modulation damper (5) for a double-layer steel chimney according to any one of claims 1 to 6, characterized in that: The inner cylinder (1) and the outer cylinder (2) are made of steel.

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