Tuning inerter mass damper with steel wire rope vibration isolator

Abstract

The invention belongs to the technical field of vibration control, and discloses a tuning inerter mass damper containing a steel wire rope vibration isolator, which comprises a main body structure, a suspension bracket, a suspension steel wire rope, an annular mass block, a spring support, a steel wire rope vibration isolator, an inerter unit and a turning device, and the suspension bracket, the spring support and the turning device are welded on the main body structure; the upper end of the suspension steel wire rope is connected with the suspension bracket; the annular mass block is connected with the steel wire rope vibration isolator and the inerter unit; the other end of the steel wire rope vibration isolator is connected with the main body structure through a spring support, and the inerter unit is connected with the main body structure through a turning device. The device has the functions of a spring element and a damping element of a traditional tuned mass damper at the same time, the installation space is saved, the gear and rack type inerter is added, the mass amplification characteristic of the inerter unit is utilized, the mass needed by the vibration reduction device is greatly reduced on the premise that the vibration reduction performance is guaranteed, and wind loads in different directions are coped with through the direction changing device.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration control, and in particular relates to a tuned inertia mass damper containing a wire rope vibration isolator. Background Art

[0002] Tall equipment includes high tower equipment, chimneys, wind turbine towers, etc., which are widely used in petrochemical and wind power industries. The structure of tall equipment is usually a cylindrical structure with a small cross-sectional area and a large aspect ratio. It is a typical high-flexible structure and is easily affected by wind loads. Tall equipment vibrates in two directions under the action of wind loads: one is the vibration in the direction of the wind, and the direction of the vibration in the direction of the wind is consistent with the direction of the wind; the other is the vibration in the direction of the crosswind, and the direction of the crosswind vibration is perpendicular to the direction of the wind. The latter is more destructive to the equipment. When crosswind resonance occurs, the tall equipment will bend and tilt, affecting normal operation. In severe cases, it will cause equipment fatigue damage or even collapse. Therefore, it is very important to control the vibration of tall equipment.

[0003] Tuned Mass Damper is a passive vibration control system, which has been widely used in high-rise buildings and engineering. TMD is mainly composed of mass block, spring and damping. Its working principle is: by adjusting the system parameters, the natural frequency of TMD is adjusted to the frequency close to the vibration mode controlled by the main structure. Under the action of wind load, when the main structure resonates, TMD will produce resonant behavior opposite to the main structure due to the inertia of the mass block and the restoring force generated by the spring. Thus, during the vibration process, the energy of the main structure vibration is absorbed and the vibration of the main structure is reduced.

[0004] In actual engineering, the solution of suspended mass blocks is often used for tall equipment. The mass in TMD has a great influence on the vibration reduction performance, but if the mass of the mass block is too large, the installation cost will be increased, and if the mass of the mass block is too small, the vibration reduction effect will be reduced. Summary of the invention

[0005] The object of the present invention is to provide a tuned inertia mass damper including a wire rope vibration isolator to solve the above-mentioned technical problems.

[0006] In order to solve the above technical problems, the specific technical solution of a tuned inertia mass damper containing a wire rope vibration isolator of the present invention is as follows: A tuned inertia mass damper with a wire rope vibration isolator comprises a main structure, a suspension bracket, a suspension wire rope, an annular mass block, a spring support, a wire rope vibration isolator, an inertia unit and a direction-changing device. The main structure is provided with evenly distributed pads so that the suspension bracket, the spring support and the direction-changing device can be welded to the main structure; the upper end of the suspension wire rope is connected to the suspension bracket, and the lower end is connected to the annular mass block; the annular mass block is connected to the wire rope vibration isolator and the inertia unit; the other end of the wire rope vibration isolator is connected to the main structure through the spring support, and the inertia unit is connected to the main structure through the direction-changing device.

[0007] Furthermore, the wire rope vibration isolator is connected in parallel with the inertia unit.

[0008] Furthermore, the annular mass block includes a plurality of mass sub-blocks, and the plurality of mass sub-blocks form a circular ring shape.

[0009] Furthermore, a suspension plate is provided inside the mass block for connecting a suspension wire rope; a plurality of bolt holes are provided on the mass block for connecting the wire rope isolator with the inertia unit; and a connecting plate is provided on the mass block so that the mass blocks are connected through connecting pieces.

[0010] Furthermore, the connecting pieces are bolts and nuts.

[0011] Furthermore, the inertial capacity unit adopts a gear rack type inertial capacity, including two pinions, a large gear, two rotating shafts, a flywheel, a rack, a mounting frame, a connecting device, and a limiting device; the pinion and the large gear are installed on the rotating shaft, the pinion is meshed with the large gear, the pinion and the flywheel are installed on the rotating shaft, and the pinion is meshed with the transmission rack for transmission.

[0012] Furthermore, when subjected to wind load, the transmission rack slides in the rack groove along the axial direction, driving the small gear to rotate, and the large gear on the same shaft rotates at the same time, driving the small gear to rotate, and the flywheel on the shaft starts to rotate at the same time as the small gear, providing inertial force for the entire inertial unit.

[0013] Furthermore, the direction-changing device comprises a plurality of universal joints, and the direction-changing device is installed between the main structure and the inertia unit, and the direction-changing device is used to realize multi-directional rotation.

[0014] Furthermore, when the actual wind direction deviates from the designed installation angle of the damper, the direction-changing device adjusts the angle of the inertia unit by rotating in the circumferential direction, so that the damper can move relatively freely relative to the main structure.

[0015] The tuned inertia mass damper with a wire rope vibration isolator of the present invention has the following advantages: The wire rope vibration isolator of the present invention has the functions of the spring element and the damping element of the traditional tuned mass damper, saves installation space, increases the gear rack inertia, and utilizes the mass amplification characteristics of the inertia unit to greatly reduce the mass required for the vibration reduction device while ensuring the vibration reduction performance. Through the changing device, it can cope with wind loads in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of a tuned inertia mass damper including a wire rope vibration isolator according to the present invention; Figure 2 It is a schematic diagram of the annular mass block of the present invention; Figure 3 It is a schematic diagram of the wire rope vibration isolator of the present invention; Figure 4 It is a schematic diagram of the structure of the inertia container device of the present invention; Figure 5 This is a mathematical model diagram of the damper described in the present invention.

[0017] Explanation of marks in the figure: 1. Main structure; 2. Suspension bracket; 3. Suspension wire rope; 4. Annular mass block; 401. Mass sub-block; 4011. Bolt hole; 402. Suspension plate; 403. Connecting plate; 5. Connecting piece; 6. Wire rope isolator; 7. Spring support; 8. Inertia unit; 801. Pinion one; 802. Pinion two; 803. Large gear; 804. Rotating shaft one; 805. Rotating shaft two; 806. Flywheel; 807. Rack; 808. Mounting frame; 809. Connecting device; 810. Limiting device; 9. Direction changing device. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the present invention, a tuned inertia mass damper containing a wire rope vibration isolator of the present invention is further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a tuned inertia mass damper with a wire rope vibration isolator of the present invention comprises a main structure 1, a suspension bracket 2, a suspension wire rope 3, an annular mass block 4, a wire rope vibration isolator 6, a spring support 7, an inertia unit 8 and a direction-changing device 9. Evenly distributed pads are arranged on the main structure 1, so that the suspension bracket 2, the spring support 7 and the direction-changing device 9 can be welded to the main structure 1; the upper end of the suspension wire rope 3 is connected to the suspension bracket 2, and the lower end is connected to the annular mass block 4; the annular mass block 4 is connected to the wire rope vibration isolator 6 and the inertia unit 8; the other end of the wire rope vibration isolator 6 is connected to the main structure 1 through the spring support 7, and the inertia unit 8 is connected to the main structure 1 through the direction-changing device 9; the wire rope vibration isolator 6 and the inertia unit 8 are in parallel.

[0020] like Figure 2 As shown, the annular mass block 4 includes a plurality of mass sub-blocks 401, which are enclosed in a circular ring shape. A suspension plate 402 is provided inside the mass sub-block 401 for connecting the suspension wire rope 3; a plurality of bolt holes 4011 are provided on the mass sub-block 401 for connecting the wire rope vibration isolator 6 with the inertia unit 8; a connecting plate 403 is provided on the mass sub-block 401, so that the mass sub-block 401 is connected through a connecting member 5, and the connecting member 5 is preferably a bolt and nut. The annular mass block 4 and the inertia unit 8 together provide the mass required by the damper.

[0021] like Figure 3 As shown, the wire rope isolator 6 provides the stiffness and damping required by the damper.

[0022] like Figure 4 As shown, the inertial capacity unit 8 adopts a gear rack type inertial capacity, including pinion 1 801, pinion 2 802, a large gear 803, rotating shaft 1 804, rotating shaft 2 805, flywheel 806, rack 807, mounting frame 808, connecting device 809, and limiting device 810; wherein pinion 1 801 and large gear 803 are installed on rotating shaft 804, pinion 2 802 is meshed with large gear 803, pinion 1 802 and flywheel 806 are installed on rotating shaft 2 805, and pinion 1 801 is meshed with transmission rack 807 for transmission. When subjected to wind load, the transmission rack 807 slides in the rack groove along the axial direction, driving the pinion 1 801 to rotate, and the large gear 803 on the rotating shaft 1 804 rotates at the same time, driving the pinion 2 802 to rotate, and the flywheel 806 on the rotating shaft 2 805 starts to rotate at the same time as the pinion 2 802, providing inertial force for the entire inertial unit 8, thereby reducing the overall mass required by the system. The inertial unit 8 is connected to the main structure 1 through the direction-changing device 9, which enables the tuned inertial mass damper to achieve better vibration control under wind loads in different wind directions.

[0023] The diagram is a schematic diagram of the structure of the direction-changing device 9 of the present invention. The direction-changing device 9 includes a universal hinge, and the direction-changing device 9 is installed between the main structure 1 and the inertia unit 8. Since the inertia unit 8 can only move axially, its movement is limited, while the universal hinge of the direction-changing device 9 can achieve multi-directional rotation. When the actual wind direction deviates from the designed installation angle of the damper, the direction-changing device 9 adjusts the angle of the inertia unit 8 by rotating in the circumferential direction, so that the damper can move relatively freely relative to the main structure 1, thereby achieving a better vibration reduction effect.

[0024] like Figure 5As shown, it is a schematic diagram of the mathematical model of the present invention. The tuned inertia mass damper of the present invention is composed of spring stiffness k, damping c, mass m, and inertia unit b, wherein the wire rope isolator provides spring stiffness k and damping c, and the inertia unit b provides inertia mass min, and together with the mass ring provides the mass m of the vibration reduction system. Compared with the traditional tuned mass damper, the present invention can greatly reduce the mass required for the overall vibration reduction system.

[0025] The function of the present invention is to make the natural frequency of the tuned inertial mass damper close to the first-order natural frequency of the equipment through parameter design. When the tall equipment resonates with the crosswind due to the wind load, the tuned inertial mass damper produces a vibration that is relatively delayed compared to the main structure due to the inertial mass provided by the mass ring and the inertial unit. The vibration energy of the main structure is absorbed through the reverse resonance behavior, thereby achieving the purpose of vibration reduction.

[0026] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A tuned inertia mass damper including a wire rope vibration isolator (6), comprising a main structure (1), a suspension bracket (2), a suspension wire rope (3), an annular mass block (4), a spring support (7), a wire rope vibration isolator (6), an inertia mass unit (8) and a direction-changing device (9), characterized in that: The main structure (1) is provided with evenly distributed pads so that the suspension bracket (2), the spring support (7) and the direction-changing device (9) can be welded to the main structure (1); the upper end of the suspension steel wire (3) is connected to the suspension bracket (2), and the lower end is connected to the annular mass block (4); the annular mass block (4) is connected to the steel wire isolator (6) and the inertia unit (8); the other end of the steel wire isolator (6) is connected to the main structure (1) via the spring support (7), and the inertia unit (8) is connected to the main structure (1) via the direction-changing device (9).

2. The tuned inertia mass damper with wire rope vibration isolator according to claim 1, characterized in that: The wire rope vibration isolator (6) and the inertia unit (8) are connected in parallel.

3. The tuned inertia mass damper with wire rope vibration isolator according to claim 1, characterized in that: The annular mass block (4) comprises a plurality of mass sub-blocks (401), and the plurality of mass sub-blocks (401) are surrounded by a circular ring shape.

4. The tuned inertia mass damper with wire rope vibration isolator according to claim 3, characterized in that: A suspension plate (402) is provided inside the mass block (401) for connecting a suspension wire rope (3); a plurality of bolt holes (4011) are provided on the mass block (401) for connecting the wire rope vibration isolator (6) to the inertia unit (8); and a connecting plate (403) is provided on the mass block (401) so that the mass blocks (401) are connected via a connecting piece (5).

5. The tuned inertia mass damper with wire rope vibration isolator according to claim 4, characterized in that: The connecting piece (5) is a bolt and a nut.

6. The tuned inertia mass damper with wire rope vibration isolator according to claim 1, characterized in that: The inertia capacity unit (8) adopts a gear rack (807) type inertia capacity, comprising a pinion 1 (801), a pinion 2 (802), a large gear (803), a rotating shaft 1 (804), a rotating shaft 2 (805), a flywheel (806), a rack (807), a mounting frame (808), a connecting device (809), and a limiting device (810); wherein the pinion 1 (801) and the large gear (803) are mounted on the rotating shaft, the pinion 2 (802) and the large gear (803) are meshed, the pinion 1 (801) and the flywheel (806) are mounted on the rotating shaft 2 (805), and the pinion 1 (801) and the transmission rack (807) are meshed for transmission.

7. The tuned inertia mass damper with wire rope vibration isolator according to claim 6, characterized in that: When subjected to wind load, the transmission rack (807) slides in the rack (807) groove along the axial direction, driving the pinion 1 (801) to rotate, and the large gear (803) on the rotating shaft 1 (804) rotates at the same time, driving the pinion 2 (802) to rotate, and the flywheel (806) on the rotating shaft 2 (805) starts to rotate at the same time as the pinion 2 (802), providing inertial force for the entire inertial unit (8).

8. The tuned inertia mass damper with wire rope vibration isolator according to claim 1, characterized in that: The direction-changing device (9) comprises a plurality of universal joints. The direction-changing device (9) is installed between the main structure (1) and the inertia unit (8). The direction-changing device (9) is used to realize multi-directional rotation.

9. The tuned inertia mass damper with wire rope vibration isolator according to claim 8, characterized in that: When the actual wind direction deviates from the designed installation angle of the damper, the direction-changing device (9) adjusts the angle of the inertia unit (8) by rotating in a circumferential direction, so that the damper can move relatively freely relative to the main structure (1).

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