Mass and liquid combined tuning steel chimney damper

Abstract

The utility model provides a mass and liquid combined tuning steel chimney damper, which is applied to the technical field of steel chimneys, and is characterized by comprising a chimney body and an annular liquid damping device, and the annular liquid damping device is fixedly arranged on the circumferential outer wall of the chimney body; the at least two spring vibration isolators are fixed on the outer side wall of the annular liquid damping device; the mass ring is arranged on the spring vibration isolator in a sleeving mode, and the mass ring is fixedly connected with the spring vibration isolator; the top plate support is fixed to the portion, above the mass ring, of the outer wall of the chimney body, and a suspension rope with one end fixedly connected with the mass ring is fixedly arranged on the top plate support. The damper has the technical effects that the mass damper and the liquid damper are combined and tuned into a system design, so that the damping effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel chimneys, in particular to a steel chimney damper with combined mass and liquid tuning. Background Technique

[0002] According to the "Technical Standard for Chimney Engineering", for tall steel chimneys that undergo cross-wind vortex-induced resonance and the Scruton number SC is not greater than 15, vibration reduction devices can be installed on the chimneys to avoid excessive deformation damage or fatigue damage of the chimneys. The vibration reduction devices have two forms: mass dampers and liquid dampers. The mass damper forms a vibration reduction secondary system through a mass ring, spring isolators, and suspension steel wires. The liquid damper forms a vibration reduction system through a separated box body and liquid.

[0003] For the damped chimney main system, the mass, frequency, and damping ratio of the damper at its top all affect its vortex-induced amplitude. For mass or liquid dampers, when their natural frequencies are consistent with the first natural frequency of the chimney, the mass ring of the damper and the movement of the chimney present a phase difference of π / 2, and the vibration reduction effect is the best. At the same time, the larger the mass of the mass ring of the mass damper or the damping liquid of the liquid damper, the greater the vibration reduction force, and the greater the additional load at the top of the chimney, which affects the static mechanical effect of the chimney structure.

[0004] Therefore, there is currently no damper with combined mass and liquid tuning to adapt to the use of steel chimneys. Content of the Utility Model

[0005] The purpose of the utility model is to provide a steel chimney damper with combined mass and liquid tuning, and its advantage is to combine and tune the mass and liquid dampers into a system design to improve its vibration reduction effect.

[0006] To achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0007] A steel chimney damper with combined mass and liquid tuning, including a chimney body,

[0008] An annular liquid damping device, which is fixedly arranged on the circumferential outer wall of the chimney body;

[0009] Spring isolators, at least two spring isolators are fixed on the outer side wall of the annular liquid damping device;

[0010] A mass ring, the mass ring is sleeved on the spring isolator and the mass ring is fixedly connected with the spring isolator;

[0011] A top plate bracket, the top plate bracket is fixed on the outer wall of the chimney body above the mass ring, and a suspension rope with one end fixedly connected to the mass ring is fixedly arranged on the top plate bracket.

[0012] With the above technical solution, when transverse vortex-induced resonance occurs in the chimney, the wind vibration energy can be fully dissipated through the mass damper and the liquid damper. Part of the wind vibration energy is converted into the potential energy of the mass ring and then into its swinging kinetic energy; the remaining wind vibration energy is converted into the potential energy of the damping liquid and then into its flowing kinetic energy, working together synergistically and coupling to dissipate energy, thereby dissipating the wind vibration energy of the chimney main system and reducing its wind vibration amplitude.

[0013] In an embodiment of the present invention, the annular liquid damping device includes a partition box fixed on the chimney body and damping liquid injected into the partition box.

[0014] In an embodiment of the present invention, at least one radial partition plate is radially fixed in the partition box; the radial partition plate divides a radial cavity in the partition box; a liquid injection nozzle communicating with the radial cavity is provided on the partition box.

[0015] In an embodiment of the present invention, a plurality of axial partition plates are axially fixed in the radial cavity, and through holes are formed in the axial partition plates.

[0016] In an embodiment of the present invention, the partition box includes two annular plates disposed opposite to each other and respectively fixedly connected to the chimney plate body, an outer side plate fixedly connected to both ends of the two annular plates respectively, and an inner side plate disposed opposite to the outer side plate and fixedly connected to both ends of the two annular plates respectively.

[0017] In an embodiment of the present invention, a spring bracket is fixedly provided on the outer side plate, and the spring vibration isolator is fixedly provided on the spring bracket.

[0018] As described above, a steel chimney damper with combined mass and liquid tuning of the present invention has the following beneficial effects:

[0019] 1. The steel chimney damper with combined mass and liquid tuning creatively designs the two into a system. By designing the optimal mass ratio and stiffness ratio of the combined tuning damper and the chimney main system, and the optimal damping ratio of the chimney-combined damper structure system, the mass damper and the liquid damper work together synergistically and couple to dissipate energy, making the vibration amplitude of the entire chimney-combined damper structure system the smallest in the full frequency band, giving more safety margins to steel chimneys with thinner wall thicknesses and greater heights.

[0020] 2. Under the same design conditions, the liquid mass ratio of the liquid damper of the combined tuning steel chimney damper is smaller than that of a single liquid damper; the mass ring thickness in the mass damper is smaller than that of a single mass damper. With the same vibration reduction and energy dissipation effect, the participating mass of the combined tuning damper is smaller than that of a single one, reducing the additional load on the chimney. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the overall structure of the embodiment of the present utility model from the front view perspective;

[0022] Figure 2 is Figure 1 the enlarged schematic view of part A in

[0023] Figure 3 It is a cross-sectional view of the overall structure of the embodiment of the present utility model from the top view perspective.

[0024] Reference numerals: 1, chimney body; 2, annular liquid damping device; 3, spring vibration isolator; 4, mass ring; 5, top plate bracket; 6, suspension rope; 201, partition box; 8, radial partition plate; 9, axial partition plate; 10, through hole; 11, ring plate; 12, outer plate; 13, inner plate; 14, spring bracket; 15, upper radial cavity; 16, lower radial cavity; 17, small cavity; 18, upper liquid injection nozzle; 19, lower liquid injection nozzle; 20, piston cover. Detailed implementation manners

[0025] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0026] Please refer to Figures 1 to 3 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0027] Please refer to Figure 1 、 Figure 2 and Figure 3 , the present utility model provides a steel chimney damper with combined mass and liquid tuning, including a chimney body 1, an annular liquid damping device 2, a spring vibration isolator 3, a mass ring 4, and a top plate bracket 5,

[0028] The annular liquid damping device 2 is fixedly arranged on the circumferential outer wall of the chimney body 1; the annular liquid damping device 2 includes a partition box 201 fixed on the chimney body 1 and damping liquid injected into the partition box 201; the damping liquid selection needs to not freeze at the lowest temperature of the project, and it can be water, silicone oil, mineral oil, etc.;

[0029] The partition box 201 includes two ring plates 11, an outer side plate 12 and an inner side plate 13; the two ring plates 11 are arranged up and down relatively, and one ends of the two ring plates 11 are welded and fixed on the side wall of the chimney body 1, the upper and lower ends of the outer side plate 12 are respectively welded and fixed on the two ring plates 11, the inner side plate 13 is arranged close to the chimney body 1, and the two ends of the inner side plate 13 are respectively welded and fixed on the two ring plates 11. There is a certain distance between the inner side plate 13 and the chimney body 1, so as to prevent the liquid from directly contacting the chimney body 1 and avoid the chimney body 1 from being corroded by the damping liquid; a cavity for accommodating the damping liquid is formed between the two ring plates 11, the inner side plate 13 and the outer side plate 12; at least one radial partition plate 8 is fixedly arranged radially in the partition box 201, and the radial partition plate 8 divides a radial cavity in the cavity of the partition box 201, and a liquid injection nozzle communicating with the radial cavity is arranged on the partition box 201;

[0030] In this embodiment, a radial partition plate 8 is welded and fixed in the partition box 201. The two ends of the radial partition plate 8 are respectively welded and fixed to the inner side plate 13 and the outer side plate 12. The radial partition plate 8 divides the cavity in the box into an upper radial cavity 15 and a lower radial cavity 16. An upper liquid injection nozzle 18 communicating with the upper radial cavity 15 and a lower liquid injection nozzle 19 communicating with the lower radial cavity 16 are fixedly arranged on the upper ring plate 11. The damping liquid is respectively injected into the upper radial cavity 15 and the lower radial cavity 16 through the upper liquid injection nozzle 18 and the lower liquid injection nozzle 19; wherein the upper ends of the upper liquid injection nozzle 18 and the lower liquid injection nozzle 19 are blocked by piston covers 20; a plurality of axial partition plates 9 are axially fixed in the upper radial cavity 15 and the lower radial cavity 16. The axial partition plates 9 are respectively welded to the upper ring plate 11, the radial partition plate 8, the inner side plate 13, the outer side plate 12 or the lower ring plate 11, the radial partition plate 8, the inner side plate 13, the outer side plate 12; thereby further dividing the upper radial cavity 15 and the lower radial cavity 16 into several small cavities 17, and through holes 10 are formed in the axial partition plates 9, and the through holes 10 enable the damping liquid to flow between the several small cavities 17.

[0031] Please refer to Figure 1 、 Figure 2 and Figure 3, at least two spring vibration isolators 3 are installed on the separation box 201; several spring brackets 14 are welded and fixed on the outer side plate 12. In this embodiment, four spring brackets 14 are annularly arrayed at equal angles on the outer wall of the outer side plate 12, and the four spring vibration isolators 3 are respectively bolted and fixed on the four spring brackets 14; the mass ring 4 is sleeved outside the spring vibration isolator 3 and fixed together with the spring vibration isolator 3 by bolts;

[0032] In this embodiment, at least two top plate brackets 5 are provided. The top plate brackets 5 are welded and fixed on the outer wall of the chimney body 1 above the mass ring 4. The suspension ropes 6 are bolted and fixed on the top plate brackets 5. The suspension ropes 6 are steel wires. The steel wires have the characteristics of high strength, large elasticity, good toughness, wear resistance, etc.; the other end of the suspension rope 6 is fixedly connected with the mass ring 4 by bolts; the top plate brackets 5 and the suspension steel wires are used to strengthen the connection between the mass ring 4, the separation box 201 and the chimney body 1, thereby improving the overall stability.

[0033] In summary, for the steel chimney damper with mass and liquid combined tuning of the present invention, the two are creatively designed as a system. By designing the optimal mass ratio and stiffness ratio of the combined tuning damper and the chimney main system, and the optimal damping ratio of the chimney-combined damper structure system, the mass damper and the liquid damper work together synergistically and couple to dissipate energy, so that the vibration amplitude of the entire chimney-combined damper structure system is minimized in the full frequency band, giving more safety margins to steel chimneys with thinner wall thicknesses and greater heights; under the same design conditions, the liquid mass ratio of the liquid damper of the combined tuning steel chimney damper participating in vibration is smaller than that of a single liquid damper; the thickness of the mass ring in the mass damper is smaller than that of a single mass damper. Under the same vibration reduction and energy dissipation effect, the participating mass of the combined tuning damper is smaller than that of a single one, reducing the additional load on the chimney. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0034] The above embodiments only illustratively explain the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A steel chimney damper with combined tuning of mass and liquid, characterized in that: It includes a chimney body (1), a ring-shaped liquid damping device (2), and the ring-shaped liquid damping device (2) is fixedly arranged on the circumferential outer wall of the chimney body (1); spring vibration isolators (3), and at least two spring vibration isolators (3) are fixed on the outer side wall of the ring-shaped liquid damping device (2); a mass ring (4), and the mass ring (4) is sleeved on the spring vibration isolator (3) and the mass ring (4) is fixedly connected with the spring vibration isolator (3); a top plate support (5), and the top plate support (5) is fixed on the outer wall of the chimney body (1) above the mass ring (4), and a suspension rope (6) with one end fixedly connected with the mass ring (4) is fixedly arranged on the top plate support (5).

2. The steel chimney damper with combined mass and liquid tuning according to claim 1, characterized in that: The ring-shaped liquid damping device (2) includes a partition box (201) fixed on the chimney body (1) and damping liquid injected into the partition box (201).

3. The steel chimney damper with combined mass and liquid tuning according to claim 2, wherein: At least one radial partition plate (8) is radially fixed in the partition box (201); the radial partition plate (8) divides a radial cavity in the partition box (201); and a liquid injection nozzle communicated with the radial cavity is arranged on the partition box (201).

4. A steel chimney damper with combined mass and liquid tuning according to claim 3, characterized in that: A plurality of axial partition plates (9) are axially fixed in the radial cavity, and through holes (10) are formed in the axial partition plates (9).

5. A steel chimney damper with combined mass and liquid tuning according to claim 2, characterized in that: The partition box (201) includes two relatively arranged ring plates (11) respectively fixedly connected with the chimney plate body, an outer side plate (12) with two ends respectively fixedly connected with the two ring plates (11), and an inner side plate (13) arranged opposite to the outer side plate (12) and with two ends respectively fixedly connected with the two ring plates (11).

6. A steel chimney damper with combined tuning of mass and liquid according to claim 5, characterized in that: A spring support (14) is fixedly arranged on the outer side plate (12), and the spring vibration isolator (3) is fixedly arranged on the spring support (14).

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