Liquid mass composite tuning damping device

Abstract

The invention discloses a liquid mass composite tuning vibration damper, which belongs to the technical field of vibration, mainly comprises a mass ball, a suspender, a fixed rod, an upper sleeve, viscous liquid and a liquid storage tank, and is characterized in that the fixed rod is connected to a flange at the top of the upper sleeve and connected with the suspender through a universal joint, the mass ball is arranged at the tail end of the suspender, and the viscous liquid is arranged in the suspension rod. The fixing rod, the universal joint and the suspender are soaked in the viscous liquid, and the viscous liquid is contained in the liquid storage tank; the liquid storage tank and the upper sleeve are connected together through a fixing plate to form a sealing structure. The damping device has the characteristics of excellent damping effect, adjustability, high adaptability, compact structure, convenience in installation and maintenance and the like.

Description

Technical Field

[0001] The present invention belongs to the field of vibration technology, and specifically relates to a liquid mass composite tuning vibration reduction device suitable for tall upright equipment and a use method, especially to the vibration reduction of in-service or newly built tall towers and chimneys. Technical Background

[0002] With the large-scale petrochemical plants, the height-to-diameter ratio of tall vertical equipment such as towers and chimneys is getting larger and larger. When tall vertical equipment is subjected to wind or earthquake, it is easy to cause violent vibration of the tall vertical equipment, thereby causing strength damage or fatigue damage to the equipment. In recent years, there have been frequent cases of damage to tall vertical equipment due to vibration. In engineering design, the cost is too high if the wall thickness of the equipment is increased or the side support frame structure is added. In recent years, referring to the vibration reduction technology of tall structures, tuned dampers are installed on tall vertical equipment to improve the damping ratio of the vertical equipment, which can achieve effective vibration reduction effects and is more economical. Tuned dampers are divided into two categories: tuned mass dampers (TMD) and tuned liquid dampers (TLD).

[0003] The tuned mass damper (TMD) consists of a mass block, a spring and a damping system, that is, the vibration frequency of the damper is adjusted to the vicinity of the natural frequency of the upright device. When the mass block and the upright device have relative motion, the inertial force generated by the mass block acts on the upright device to achieve the purpose of vibration reduction. The damping components of the tuned mass damper (TMD) are easily affected by the external environment, such as rain and strong wind, and have weak adjustability, making it difficult to adapt to the complex and changeable external environment. In addition, the mass ring of the tuned mass damper (TMD) easily interferes with the platform ladder and auxiliary components of the upright device, making it difficult to install.

[0004] The tuned liquid damper TLD uses the dynamic lateral force generated by the liquid in the fixed water tank during the sloshing process to provide vibration reduction. The vibration reduction effect of a simple tuned liquid damper TLD is poor, especially under the action of multi-dimensional vibration, the liquid surface of the tuned liquid damper TLD is more likely to produce irregular liquid surface sloshing, and the vibration reduction performance is greatly affected. Therefore, studying the mechanism of wind-induced vibration of high-rise tower equipment and inventing a new type of vibration reduction device are of profound significance for ensuring safe production in petrochemicals. Summary of the invention

[0005] To solve the above problems, the present invention provides a liquid mass composite tuning vibration reduction device and a method of use, which has the characteristics of excellent vibration reduction effect, adjustability, strong adaptability, compact structure, and easy installation and maintenance.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A liquid mass composite tuning vibration reduction device is mainly composed of a viscous liquid, a liquid storage tank, a mass ball, a suspension rod, a fixed rod, an upper sleeve, a viscous liquid, and a liquid storage tank. It is characterized in that: the suspended mass ball is immersed in the viscous liquid storage tank, the mass ball is suspended on the top flange of the upper sleeve through the suspension rod, a universal joint, and a fixed rod, and the liquid storage tank and the upper sleeve are connected together to form a sealing structure.

[0008] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the liquid mass composite tuning vibration reduction device is fixed to the top of a tall upright device through a connecting piece, and multiple liquid mass composite tuning vibration reduction devices are evenly distributed at equal heights along the circumferential direction.

[0009] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that: the liquid mass composite tuning vibration reduction device is cylindrical and fixed to the outer wall of the tall upright equipment through a connecting plate. The vibration reduction device can pass through the tall upright equipment platform and can avoid the tower pipeline and ladder through reasonable arrangement. According to the vibration reduction effect required, 2 to 8 liquid mass composite tuning vibration reduction devices can be arranged. The vibration reduction device is a flange sealing structure, which can prevent leakage of the stored liquid and interference from the external environment.

[0010] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the mass ball suspended by the fixing rod, the universal joint and the suspension rod can swing in any direction. When the required swing mass is small, a solid stainless steel metal ball structure can be used, and when the required swing mass is large, a sphere with a stainless steel shell and lead filled inside can also be used.

[0011] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the end of the fixing rod is a threaded rod, and the length of the fixing rod can be adjusted by a nut, thereby adjusting the depth of the mass ball immersed in the liquid storage tank.

[0012] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the upper sleeve is a cylindrical shell structure, and its inner diameter is slightly larger than the outer diameter of the mass ball so that the mass ball can be drawn out from the top flange.

[0013] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the liquid storage tank is composed of a cylindrical shell, an upper conical reducing section, a lower conical reducing section, an upper baffle and a base.

[0014] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that: the inner wall of the liquid storage tank is evenly distributed with 4 to 8 perforated baffles along the circumferential direction, which can increase the damping when the liquid sways. A filling port is provided at the top of the liquid storage tank and a condensate discharge port is provided at the bottom, and the liquid level of the viscous liquid is adjusted by filling and emptying.

[0015] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that the viscous liquid is usually a viscous antifreeze liquid, which has multiple functions such as antifreeze, anti-boiling, anti-corrosion, and anti-scaling.

[0016] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that a partition is provided between the liquid storage tank and the upper sleeve to prevent the viscous liquid from overflowing when the liquid surface shakes; the partition is composed of two upper and lower ring plates.

[0017] The liquid mass composite tuning vibration reduction device of the present invention is further characterized in that: a limit block is provided near the bottom of the upper sleeve at the suspension rod, the limit block is an annular limit block, and the limit block is an elastic buffer pad made of rubber; the annular limit block is fixed to the bottom of the upper sleeve through a double-layer partition. The suspension rod passes through the center of the annular limit block and is connected to the top fixed rod through a universal joint.

[0018] The basic principle of the present invention is that the liquid mass composite tuned vibration reduction device is composed of a tuned mass damper and a tuned liquid damper. Through reasonable design, the liquid mass composite tuned vibration reduction device can provide a larger damping ratio and adapt to a wider vibration frequency range, and has an excellent vibration reduction effect.

[0019] The pendulum-type tuned mass damper is composed of a suspended mass ball, a suspension rod and a viscous liquid, wherein the mass ball provides the mass of the simple pendulum, the stiffness is provided by the restoring force of the simple pendulum, and the damping is provided by the friction between the viscous liquid and the mass ball. When the tower vibrates, the suspended mass ball will swing. When the natural frequency of the simple pendulum is close to the natural frequency of the vertical device, it can generate a vibration in the opposite phase to the tower, thereby constituting a vibration reduction force on the vertical device. By adjusting the depth of the mass ball immersed in the viscous liquid, the natural frequency of the mass ball pendulum is close to the frequency of the vertical device.

[0020] The viscous liquid and the liquid storage tank form a tuned liquid damper. When the tower vibrates, the viscous liquid in the liquid storage tank will also sway. The dynamic pressure difference caused by the swaying on the liquid storage tank constitutes a damping force on the vertical device. The friction between the viscous liquid and the liquid storage wall and the friction between the viscous liquid and the baffle in the liquid storage tank provide damping. The liquid level of the viscous liquid is adjusted to make its natural frequency close to the frequency of the vertical device, and the mass ratio of the liquid to the vertical device is adjusted.

[0021] The present invention is applicable to newly built or in-service tall vertical equipment such as towers or chimneys, and has the following beneficial effects:

[0022] 1) The vibration reduction device is installed on the top of the tall upright equipment, which can effectively reduce the first-order vibration mode of the upright equipment.

[0023] 2) The same vibration reduction devices are independently and evenly distributed at the same height around the top of the tall upright equipment, which can meet the vibration reduction needs of the tower in all directions and realize the synchronous swing of each vibration reduction device.

[0024] 3) The vibration reduction device has a flange sealing structure. The viscous liquid, metal balls, hangers and other components are all in a closed space to prevent leakage of the stored liquid and external environment such as rain or other pollution.

[0025] Ensure the long-term safe and reliable operation of the vibration reduction device.

[0026] 4) The metal ball of the vibration reduction device is suspended on the top flange cover through a suspension rod, a universal joint, and a fixing rod. The metal ball can swing in any direction and can be applied to vibration loads in any direction. 5) The top fixing rod of the vibration reduction device is a threaded rod. The length of the fixing rod can be adjusted through a nut to adjust the immersion depth of the metal ball, thereby adjusting the natural frequency and damping of the swing device. This achieves the best vibration reduction effect.

[0027] 6) An annular limit block is provided in the middle of the boom of the vibration reduction device. The limit block is an elastic buffer pad, which can effectively prevent the metal ball from swinging too much and prevent impact damage to the liquid storage tank when the boom vibrates.

[0028] 7) The mass ball of the vibration reduction device, considering the economy and compactness of the structure, can adopt a solid stainless steel metal ball structure when the required swing mass is small, and can also adopt a sphere with a stainless steel shell and filled with sand or concrete when the required swing mass is large.

[0029] 8) The viscous liquid of the vibration reduction device adopts viscous antifreeze, which has multiple functions such as antifreeze, anti-boiling, anti-corrosion, and anti-scale. It can adapt to different external environments and can increase the viscous damping.

[0030] 9) The vibration reduction device is provided with a liquid filling port and a condensate discharge port, which can be used for filling and discharging viscous liquids. According to the vibration characteristics of the main structure, the liquid level of the viscous liquid is adjusted to adjust the natural frequency and damping ratio of the vibration reduction device, thereby achieving the best vibration reduction effect.

[0031] 10) The liquid storage tank in the vibration reduction device is provided with a plurality of baffles with holes, which can increase the damping when the liquid shakes.

[0032] 11) A partition is provided on the top of the liquid storage tank of the vibration reduction device to prevent the viscous liquid from overflowing when the liquid surface shakes.

[0033] Liquid mass composite tuning vibration reduction device can be used for vibration reduction of existing or newly built tall towers and chimneys. Liquid mass composite tuning vibration reduction device has the characteristics of compact structure, excellent vibration reduction effect, adjustability, adaptability, etc. It is particularly suitable for wind and earthquake resistance of tall and large vertical equipment with many top accessories and large mass.

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of application of the present invention is not limited thereto. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a tall upright device equipped with a liquid mass composite tuned vibration reduction device;

[0036] Figure 2 A top view of a tall upright device equipped with a liquid mass composite tuned vibration reduction device;

[0037] Figure 3 It is a structural schematic diagram of a liquid mass composite tuning vibration reduction device of the present invention;

[0038] Figure 4 A top view of the structure of a liquid mass composite tuning vibration reduction device of the present invention;

[0039] Figure 5 It is a schematic diagram of the connection and installation of a liquid mass composite tuning vibration reduction device of the present invention;

[0040] Figure 6 This is a detailed structural diagram of the mass ball.

[0041] The reference numerals shown are: 1- tall upright equipment, 101- tower body, 102- platform, 103- tower attached pipeline, 104, ladder. 2- vibration reduction device, 201- mass ball, 202- suspension rod, 203- viscous liquid, 204- liquid storage tank, 205- upper sleeve, 206- universal joint, 207- fixing rod, 208- top flange, 209- top flange cover, 210- adjusting nut, 211- partition, 212- annular limit block, 213- baffle with holes, 214- filling port, 215- condensate discharge port, 3- connection structure, 301- pad, 302- connection plate, 303- support plate. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-6 The present invention is further described.

[0043] As attached Figure 1 , Attachment Figure 2As shown, a liquid mass composite tuning vibration reduction device of the present invention comprises a towering upright device 1, a vibration reduction device 2, and a connection structure 3. The vibration reduction device 2 is installed on the top of the towering upright device 1 through the connection structure 3, and 2 to 4 vibration reduction devices are distributed along the circumferential direction according to the vibration reduction effect requirements.

[0044] The towering upright equipment 1 generally includes an equipment body 101, a platform 102, a tower pipeline 103, etc., and a ladder 104. The tower pipeline passes through the platform 102 along the axial direction of the equipment body 101. The vibration reduction device 2 can pass through the platform 102, and avoid the tower pipeline 103 and the platform up and down ladder 104 during installation.

[0045] like Figure 3 , Figure 4 As shown, the vibration reduction device 2 is mainly composed of a mass ball 201, a suspension rod 202, a viscous liquid 203, and a liquid storage tank 204. The mass ball 201 is submerged in the viscous liquid 203, and the viscous liquid 203 is contained in the liquid storage tank 204. The mass ball 201 is connected to the top flange cover 209 through the suspension rod 202, the universal joint 206, the fixing rod 207, and the adjusting nut 210. The liquid storage tank 204 is connected to the top flange cover 209 through the upper sleeve 205 and the top flange 208 by bolts. The suspension rod 202 is provided with a partition plate 211 and an annular limit block 212 near the bottom of the upper sleeve 205. The inner wall of the liquid storage tank 204 is evenly distributed with 4 to 8 perforated baffles 213 along the circumferential direction. The top of the liquid storage tank 204 is provided with a liquid filling port 214, and the bottom is provided with a condensate discharge port 215.

[0046] like Figure 5 As shown, a pad 301 is welded to the outer wall of the equipment body 101 connected to the vibration reduction device 2. The liquid storage tank 204 and the upper sleeve 205 are connected to the outer wall pad 301 of the equipment body 101 through 2 to 3 groups of support plates 202 and connecting plates 203 respectively. The connecting plate 301 and the support plate 303 are connected by bolts. The connecting plate is connected to the vibration reduction device 2 and the pad 301 by welding. The connection structure is made of carbon steel or low alloy material.

[0047] like Figure 6 As shown, the mass ball 201 can be a solid stainless steel metal ball structure or a metal spherical shell structure with a lead core 216. The viscous liquid 203 usually adopts a viscous antifreeze liquid, which has multiple functions such as antifreeze, anti-boiling, anti-corrosion, and anti-scaling. The liquid storage tank 204 is composed of a cylindrical shell, an upper conical reducing section, a lower conical reducing section, an upper cover plate, and a base. The upper sleeve 205 is a cylindrical shell structure, and its inner diameter is slightly larger than the outer diameter of the mass ball 201, so that the mass ball 201 can be drawn out from the top flange 208.

[0048] The suspension rod 202 and the fixed rod 207 are both made of round steel structure, wherein the end of the fixed rod 207 is threaded. The upper sleeve 205 is a cylindrical structure, and its diameter is slightly smaller than that of the liquid storage tank 204. The annular stopper 212 can be made of rubber, and the gap between the annular stopper 212 and the suspension rod 202 is determined according to the swing amplitude of the mass ball determined by vibration analysis.

[0049] The partition plate 211 between the liquid storage tank 204 and the upper sleeve 205 is composed of two upper and lower ring plates and a middle fixed plate. The annular limit block 212 is fixed on the partition plate 211.

[0050] The top flange 208 and the flange cover 209 are sealed with bolts and gaskets. The top threaded end of the fixing rod 207 passes through the top flange cover 209, and the end is fixed with an adjusting nut 210. The other structures of the vibration reduction device 2 are connected by welding structures. The mass ball 201 and the suspension rod 202 are made of stainless steel. Other materials can be made of carbon steel and low alloy materials.

[0051] The vibration reduction device can be applied to the installation of existing or newly built tall towers with many accessories. The whole set of the device is installed in the middle and upper part of the existing or newly built tall tower, which has the effect of reducing the crosswind vibration of the tall equipment. It has a simple structure, convenient installation, good performance, and does not require frequent inspection and maintenance.

[0052] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the invention is usually placed when in use. They are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid mass composite tuning vibration reduction device, a liquid mass composite tuning vibration reduction device, mainly composed of a viscous liquid, a liquid storage tank, a mass ball, a suspension rod, a fixing rod, an upper sleeve, a viscous liquid, and a liquid storage tank, characterized in that The suspended mass ball is immersed in a viscous liquid storage tank, and the mass ball is suspended on the top flange of the upper sleeve through a suspension rod, a universal joint, and a fixed rod. The storage tank and the upper sleeve are connected together to form a sealing structure.

2. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The liquid mass composite tuning vibration reduction device is fixed on the top of the towering upright equipment through a connecting piece, and multiple devices are evenly distributed at the same height along the circumference.

3. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The mass ball suspended by the fixed rod, universal joint and suspension rod can swing in any direction. When the required swing mass is small, a solid stainless steel metal ball structure can be used. When the required swing mass is large, a sphere with a stainless steel shell and lead filled inside can also be used.

4. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The end of the fixing rod is a threaded rod, and the length of the fixing rod is adjusted by a nut.

5. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The upper sleeve is a cylindrical shell structure, and its inner diameter is slightly larger than the outer diameter of the mass ball so that the mass ball can be drawn out from the top flange.

6. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The liquid storage tank is composed of a cylindrical shell, an upper conical reducing section, a lower conical reducing section, an upper baffle and a base.

7. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: A partition is arranged between the liquid storage tank and the upper sleeve to prevent the viscous liquid from overflowing when the liquid surface shakes; the partition is composed of two upper and lower ring plates.

8. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The inner wall of the liquid storage tank is evenly distributed with 4 to 8 perforated baffles along the circumferential direction, which can increase the damping when the liquid shakes.

9. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: A liquid filling port is arranged at the top of the liquid storage tank, and a condensate discharge port is arranged at the bottom.

10. The liquid mass composite tuning vibration reduction device according to claim 1, characterized in that: The viscous liquid is a viscous antifreeze liquid.

11. The liquid mass composite tuning vibration reduction device according to claim 1 is characterized in that: The suspension rod is provided with a limiting block near the bottom of the upper sleeve.

12. The liquid mass composite tuning vibration reduction device according to claim 1, characterized in that: The limit block is an annular limit block, and the limit block is an elastic buffer pad made of rubber.

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