Multi-stage spiral flow STF rotation self-adaptive damping device

Abstract

The utility model relates to the technical field of engineering vibration control, in particular to a multistage spiral flow STF rotation self-adaption damping device which comprises an outer cylinder barrel, a damping cylinder, a rotating shaft and a rotating piston, one end of the rotating shaft is connected with the outer cylinder barrel through a ball screw pair, the other end of the rotating shaft can penetrate into the damping cylinder in a rotating mode, the damping cylinder is filled with shear thickening fluid, and the outer cylinder barrel is connected with the outer cylinder barrel through a ball screw pair. The rotary piston is arranged in the damping cylinder and composed of a piston barrel and piston bodies, the piston barrel is fixedly connected to the rotary shaft and can rotate along with the rotary shaft, the piston bodies are arranged on the piston barrel in parallel, and each piston body is composed of a plurality of spiral blades annularly arrayed along the center of the piston barrel. According to the device, the multi-stage rotary piston is adopted, STF in the damper spirally flows into different working areas during external excitation, meanwhile, flowing of the STF is accelerated, the shearing rate is increased, and the problem that damping liquid forms a flowing dead zone in a cylinder body when a linear damper vibrates too fast is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering vibration control technical field, concretely relates to a kind of multistage spiral flow STF rotary adaptive damping device. BACKGROUND

[0002] Under the impetus of modernization, complex engineering structures such as high-rise buildings, long-span bridges and undersea tunnels are increasing, and the safety of these structures under dynamic loads such as earthquakes and wind-induced vibrations is a major concern. As an important means of structural vibration control, dampers can effectively suppress structural dynamic responses and improve structural safety by generating damping forces that are opposite in phase to the structural vibrations, thereby converting and dissipating vibration energy.

[0003] However, traditional damper technology has obvious limitations in extreme working conditions. Specifically, the damping performance of traditional damping materials often fails to meet engineering requirements when faced with high-intensity vibrations or impacts. In addition, the current widely used viscous dampers also have problems such as leakage of damping fluid, large equipment volume, and inaccurate response under extreme loads, which seriously restrict the application effect of traditional dampers in complex engineering structures.

[0004] To overcome the above problems, researchers have begun to explore new damping materials and technologies. Among them, shear thickening fluid (STF) as a high-energy intelligent material has attracted attention due to its unique mechanical properties. STF behaves as a liquid with certain fluidity under normal conditions, but when the external energy forces its shear rate to exceed a certain value, its viscosity will increase nonlinearly and instantaneously, and it will change into a solid-like state, thereby exhibiting excellent energy absorption and dissipation capabilities. This "liquid-solid" phase transition characteristic makes STF have great application potential in the field of dampers.

[0005] Although STF material has many advantages, how to effectively apply it in dampers and fully utilize its high-energy performance is still a problem to be solved in the current technical field. The existing STF damper design often has problems such as complex structure, large space occupation, low work efficiency, etc., which is difficult to meet the high requirements of complex engineering structures on damping performance.

[0006] Therefore, the utility model provides a kind of multistage spiral flow STF rotary adaptive damping device, which aims to solve the problems existing in the current STF damper through innovative structural design and technical means, improve the damping performance and work efficiency of the damper, and provide more reliable technical support for the safety protection of complex engineering structures. UTILITY MODEL CONTENTS

[0007] In order to solve the above problems, the utility model provides a kind of multistage spiral flow STF rotary self-adapting damping device, the multistage spiral flow STF rotary self-adapting damping device adopts multistage rotary piston, when external excitation, the STF spiral flow in the damper inside flows into different working areas, while accelerating the flow of STF, increase shear rate, solve the problem that damping fluid forms flow dead zone in the cylinder body when linear damper vibrates too fast, it is a kind of safe, efficient STF damper.

[0008] The technical scheme of the utility model is as follows:

[0009] A kind of multistage spiral flow STF rotary self-adapting damping device, including outer cylinder, damping cylinder, shaft and rotary piston, outer cylinder is fixedly connected with the structure needing to be damped, one end of shaft is connected with outer cylinder by ball screw pair, the other end of shaft is rotatably inserted into damping cylinder, damping cylinder is filled with shear thickening fluid, rotary piston is arranged in damping cylinder, rotary piston is composed of piston cylinder and piston body, piston cylinder is fixedly connected on shaft and can rotate with shaft, a plurality of piston bodies are arranged in parallel on piston cylinder, each piston body is composed of a plurality of helical blades arranged in annular array along the center of piston cylinder.

[0010] Ball screw pair includes ball screw fixedly arranged at the end of shaft and nut matched with ball screw, nut is fixedly connected with outer cylinder.

[0011] Damping cylinder is composed of steel sleeve, left end cover plate and right end cover plate, left end cover plate and right end cover plate are fixedly connected at both ends of steel sleeve respectively.

[0012] Right end cover plate is welded at the right end of steel sleeve.

[0013] The left end of steel sleeve is fixedly provided with flange connecting piece, and the left end cover plate is connected to the flange connecting piece by bolts.

[0014] Shaft is installed on damping cylinder through angular contact bearing.

[0015] Sealing assembly is installed on both sides of angular contact bearing.

[0016] Sealing assembly is rubber gasket.

[0017] Rubber gasket is fixedly installed on both sides of angular contact bearing by hexagon bolt and hexagon nut.

[0018] The utility model has the advantages of:

[0019] 1. The utility model discloses a kind of multistage spiral flow STF rotary self-adaptive damping devices, the multistage spiral flow STF rotary self-adaptive damping device utilizes ball screw to change movement form and drive piston rotation, adopt multistage rotary piston, so that STF produces multiple shear rates under external excitation, and spiral flow in damper, increase the length of working area. Play STF high energy consumption effect, it is a safe, efficient damper.

[0020] 2, the utility model discloses a kind of multistage spiral flow STF rotary self-adaptive damping devices, the multistage spiral flow STF rotary self-adaptive damping device adopts ball screw and converts translational motion into rotary motion, more easily produce different shear rates, adopt multistage rotary piston, under external excitation, multiple shear rates will be generated, while rotary piston has multiple shear seams, different shear rates will be generated under external excitation, and make STF spiral flow in steel sleeve. Help to play the high energy consumption performance of STF and reduce the excessive shear force caused to the root of rotary piston when STF cannot pass shear zone in time during rotation, simple structure, no excessive outer cylinder, it is a simple structure, space-saving, safe, efficient damper. BRIEF DESCRIPTION OF DRAWINGS

[0021] The solutions and advantages of the present application will become clear to those of ordinary skill in the art from a reading of the following detailed description of the preferred embodiments. The drawings are merely for the purpose of illustrating preferred embodiments and are not to be considered as limiting the application.

[0022] In the drawings:

[0023] Figure 1 It is a structure schematic diagram of a kind of multistage spiral flow STF rotary self-adaptive damping device of the utility model embodiment;

[0024] Figure 2 It is a three-dimensional structure schematic diagram of a kind of multistage spiral flow STF rotary self-adaptive damping device of the utility model embodiment;

[0025] Figure 3 It is the three-dimensional structure schematic diagram of the rotary piston of a kind of multistage spiral flow STF rotary self-adaptive damping device of the utility model embodiment;

[0026] The components represented by the reference numerals in the drawings are:

[0027] The utility model:1, outer cylinder, 2, nut, 3, rotating shaft, 4, rotary piston, 41, piston cylinder, 42, piston body, 421, blade, 5, shear thickening fluid, 6, rubber gasket, 7, hexagon bolt, 8, hexagon nut, 9, angular contact bearing, 10, steel sleeve, 11, flange connecting piece, 12, left end cover plate, 13, right end cover plate. DETAILED DESCRIPTION

[0028] As shown in Figure 1 and Figure 2 , the multi-stage spiral flow STF rotating self-adaptive damping device mainly includes four core components: outer cylinder 1, damping cylinder, rotating shaft 3 and rotating piston 4. The vibration energy of the structure is converted into the rotating motion of the rotating piston through the ball screw pair, and then drives the shear thickening liquid (STF) in the damping cylinder to produce spiral flow, realizing efficient energy dissipation.

[0029] The outer cylinder 1, as the fixed part of the device, is fixedly connected to the structure to be damped by bolts or other fasteners. Its interior is designed with an interface matched with the ball screw pair for transmitting the vibration energy of the structure.

[0030] The damping cylinder is composed of a steel sleeve 10, a left end cover plate 12 and a right end cover plate 13. The steel sleeve 10 is a hollow cylinder, and the left end cover plate 12 and the right end cover plate 13 are fixed on both ends of the steel sleeve 10 by bolt connection and welding respectively, forming a closed damping working chamber. The right end cover plate 13 is welded with the steel sleeve 10 to ensure the sealing; the left end cover plate 12 is bolted on the flange connector 11 fixed on the left end of the steel sleeve 10, facilitating installation and disassembly.

[0031] The damping cylinder is filled with shear thickening liquid 5. The liquid is a liquid with certain fluidity under normal conditions, but its viscosity will increase nonlinearly when subjected to shear, showing excellent energy dissipation capacity.

[0032] One end of the rotating shaft 3 is connected with the outer cylinder 1 through the ball screw pair. The ball screw pair is composed of a ball screw fixedly arranged at the end of the rotating shaft 3 and a nut 2 matched with the ball screw. The nut 2 is fixedly connected with the outer cylinder 1. When the outer cylinder 1 is vibrated, the translational motion is converted into the rotating motion of the rotating shaft 3 through the ball screw pair.

[0033] The other end of the rotating shaft 3 is rotatably inserted into the damping cylinder and is installed on the damping cylinder through an angular contact bearing 9, ensuring the stability and sealing of rotation.

[0034] The rotating piston 4 is arranged in the damping cylinder, as shown in Figure 3 , which is composed of a piston cylinder 41 and a piston body 42. The piston cylinder 41 is fixedly connected with the rotating shaft 3 and can rotate with the rotating shaft 3.

[0035] A plurality of piston bodies 42 are arranged in parallel on the piston cylinder 41. Each piston body 42 is composed of a plurality of spiral blades 421 arranged in a ring around the center of the piston cylinder 41. When the rotating shaft 3 rotates, the rotating piston 4 rotates with it, driving the shear thickening liquid 5 in the damping cylinder to produce spiral flow, increasing the shear rate and realizing efficient energy dissipation.

[0036] The sealing assembly, rubber gasket 6, is installed on both sides of the angular contact bearing 9. The rubber gasket 6 is fixedly installed on both sides of the angular contact bearing 9 by hexagonal bolts 7 and hexagonal nuts 8, effectively preventing leakage of the shear thickening fluid 5 and ensuring long-term stable operation of the device.

[0037] When the outer cylinder 1 is subjected to vibration, the translational motion is converted into rotational motion of the rotating shaft 3 by the ball screw pair. The rotating shaft 3 drives the rotating piston 4 to rotate in the damping cylinder, causing the shear thickening fluid 5 to generate spiral flow. As the rotational speed increases, the shear rate of the shear thickening fluid 5 increases, its viscosity increases nonlinearly, and a large amount of vibration energy is consumed, achieving the damping effect.

[0038] The damper has good energy dissipation and damping effect. When the damper is subjected to external excitation, the nut 2 of the ball screw pair moves relatively, the ball screw cooperating with the nut 2 drives the rotating piston 4 to rotate, and the shear thickening fluid flows spirally in the working chamber under the driving of the rotating piston and undergoes shear thickening. As the rotational speed increases, the shear rate increases, the viscosity of the shear thickening fluid increases, energy is consumed, and the damping effect is achieved.

Claims

1. A multi-stage spiral flow (STF) rotary self-adaptive damping device, characterized in that, It includes outer cylinder (1), damping cylinder, rotating shaft (3) and rotating piston (4), outer cylinder (1) is fixedly connected with the structure needing to be damped, one end of rotating shaft (3) is connected with outer cylinder (1) through ball screw pair, the other end of rotating shaft (3) is rotatably inserted into damping cylinder, damping cylinder is filled with shear thickening liquid (5), rotating piston (4) is arranged in damping cylinder, rotating piston (4) is composed of piston cylinder (41) and piston body (42), piston cylinder (41) is fixedly connected on rotating shaft (3) and can rotate with rotating shaft (3), a plurality of piston bodies (42) are arranged in parallel on piston cylinder (41), each piston body (42) is composed of a plurality of helical blades (421) arranged in annular array along the center of piston cylinder (41).

2. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 1, wherein, The ball screw pair includes a ball screw fixedly arranged at the end of the rotating shaft (3) and a nut (2) matched with the ball screw, and the nut (2) is fixedly connected with the outer cylinder (1).

3. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 1, wherein, The damping cylinder is composed of a steel sleeve (10), a left end cover plate (12) and a right end cover plate (13), and the left end cover plate (12) and the right end cover plate (13) are fixedly connected at the two ends of the steel sleeve (10), respectively.

4. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 3, characterized in that, The right end cover plate (13) is welded at the right end of the steel sleeve (10).

5. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 3, wherein, The left end of the steel sleeve (10) is fixedly provided with a flange connecting piece (11), and the left end cover plate (12) is connected on the flange connecting piece (11) through bolts.

6. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 1, wherein, The rotating shaft (3) is installed on the damping cylinder through an angular contact bearing (9).

7. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 6, wherein, Sealing assemblies are installed on both sides of the angular contact bearing (9).

8. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 7, wherein, The sealing assembly is a rubber gasket (6).

9. A multi-stage spiral flow (STF) rotary self-adaptive damping device according to claim 8, wherein, The rubber gasket (6) is fixedly installed on both sides of the angular contact bearing (9) through hexagonal bolts (7) and hexagonal nuts (8).

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