CN216766339U

CN216766339U - Shearing type STF damper

Info

Publication number: CN216766339U
Application number: CN202121932318.5U
Authority: CN
Inventors: 孙丽; 刘明澈; 冯洛鑫; 张春巍; 王井利; 敦力民
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-06-17
Anticipated expiration: 2031-08-17

Abstract

The utility model provides a shear type STF damper, which comprises an upper connecting plate, steel teeth, a steel sleeve, an upper cover, a baffle and a steel spacer; the steel sleeve is provided with a plurality of steel spacers, and a stop door is welded on the steel sleeve and fixedly connected with the steel spacers; the steel tooth is provided with a plurality of tooth sheets, the steel tooth is inserted into the gap of the steel spacer, the upper part of the steel spacer is provided with a baffle plate for limiting the steel tooth, and the baffle plate is fixedly connected with the steel sleeve; the upper cover is fixedly connected with the top end of the steel sleeve, and the waist part of the upper cover is provided with an open slot for the steel teeth to pass through; the steel teeth are connected with the open slots in a dry friction sliding fit mode, and the tops of the steel teeth are fixedly connected with the upper connecting plate. As the flowable space of the STF damping fluid is extremely small compared with the space occupied by the steel teeth, the STF damping fluid can generate larger sliding speed, and is convenient for the STF to exert the shear thickening effect. With the increase of the shear rate, the viscosity of the STF is rapidly increased, so that the impact resistance and vibration isolation of the engineering structure are realized. The damper has the advantages of novel structure and definite structure, and is a safe and efficient damper.

Description

Shearing type STF damper

Technical Field

The utility model belongs to the technical field of structural vibration reduction, and particularly relates to a shear thickening fluid shear type damper.

Background

With the continuous development and progress of modern science and technology, the shock insulation and vibration reduction device of the building structure is continuously improved and updated. In recent decades, damper technology has developed rapidly in the construction and structural engineering of buildings, bridges, and the like. At present, the viscous damper has the advantages of simple structure, no need of maintenance, long service life and the like, and is widely applied to earthquake high-rise areas and high-rise buildings.

Shear Thickening Fluid (STF) is an intelligent material with excellent performance, the STF characteristic depends on the shear strain rate, when a high strain rate load is borne, the surface of a contact interface generates shear thickening behavior, the viscosity of the contact interface generates huge change, even the contact interface is changed from a liquid phase to a solid phase, and at the moment, the shear modulus of the STF is far larger than the initial shear modulus of the contact interface. Importantly, when the load is removed, the STF can be transiently changed from a solid phase to a liquid phase, and this change is reversible. Therefore, the damper based on the characteristics of the STF material can rapidly and effectively dissipate the external energy applied thereto.

At present, various defects of poor damping performance, oil leakage and non-conformity between design performance and actual use performance of the traditional viscous damper often occur due to various design and theoretical reasons.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model discloses a shear type STF viscous damper. When the damper mainly depends on the up-and-down movement of the steel teeth and the inner steel spacer and the interaction with damping liquid, the shear thickening viscosity of the STF is enhanced, so that damping force is provided to realize energy dissipation and shock absorption. The novel damper is safe and efficient and avoids liquid leakage.

The technical scheme of the utility model is as follows:

a shear type STF damper comprises an upper connecting plate, steel teeth, a steel sleeve, an upper cover, a baffle and a steel spacer; the steel sleeve is provided with a plurality of steel spacers, the steel sleeve is welded with a stop door, and the stop door is fixedly connected with the steel spacers; the steel tooth is provided with a plurality of tooth sheets, the steel tooth is inserted into the gap of the steel spacer, the upper part of the steel spacer is provided with a baffle plate for limiting the steel tooth, and the baffle plate is fixedly connected with the steel sleeve; the upper cover is fixedly connected with the top end of the steel sleeve, and the waist part of the upper cover is provided with an open slot for the steel teeth to pass through; the steel teeth are connected with the open grooves in a dry friction sliding fit mode, and the tops of the steel teeth are fixedly connected with the upper connecting plate.

The preferable technical scheme is that STF damping fluid is filled in the steel sleeve.

The preferable technical proposal is that the gap between the steel tooth and the steel spacer is 1-2 mm.

The preferable technical scheme is that the head part of the steel tooth sheet is square, and the tail part of the steel tooth sheet is a long handle.

Compared with the prior art, the utility model has the following effects and benefits:

the utility model depends on the up-and-down movement of the steel teeth and the steel spacer to form the integral shearing device, thereby shearing the internal liquid, exerting the shear thickening performance of the STF to realize the damping and energy dissipation capability of the damper and having stable and high-efficiency energy dissipation capability. The utility model can adjust the motion range of the steel teeth and the installation position of the internal baffle plate according to the actual situation to improve the provided viscous damping force so as to realize the high-efficiency energy consumption effect. Compared with the traditional viscous damper, the technical scheme of the utility model utilizes the advantages of the STF, adopts the STF damping fluid to work, increases the shearing area of the STF, enables the STF to have high energy consumption effect, and solves the problems of limited frequency range and energy consumption effect of the traditional damper and the like. By adopting the technical scheme of the utility model, the support has a simple structure, does not need a large number of connecting pieces, is convenient to install and disassemble, and solves the problems that the traditional damper needs a large number of connecting pieces in application and is inconvenient to construct.

Drawings

Fig. 1 is an exploded view of the overall structure of a shear type STF viscous damper provided by the present invention;

FIG. 2 is a cross-sectional view A-A of the shear type STF viscous damper of the present invention shown in FIG. 1;

fig. 3 is a B-B sectional view of the shear type STF viscous damper of fig. 1 according to the present invention.

Detailed Description

In order to make the objects, features and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described below with reference to fig. 1 to 3 in the embodiments of the present invention.

The utility model provides a shear type STF viscous damper, which comprises an upper connecting plate 1, steel teeth 2, an upper cover 3, a baffle 4, a steel sleeve 5 and a steel spacer 6, wherein the steel teeth 2 are arranged on the upper connecting plate; the steel sleeve 5 is a cuboid and is integrated with the steel spacer 6, and a welding mode can be adopted; the internal baffle 4 and the sleeve 5 are not integrated, and after the steel teeth 2 are placed inside, the position of the internal baffle is adjusted and then fixed (welded or bolted) with the side wall of the sleeve. After the baffle 4 is fixed, the upper cover 3 is connected (welded or bolted) with the upper part of the steel sleeve 5, and a certain space is left between the upper cover 3 and the baffle 4 so as to facilitate the flow of the STF damping fluid; the steel teeth 2 are connected with the upper connecting plate 1 through bolts, and after the steel teeth are placed in the sleeve, bolt holes are adjusted to fix the steel teeth; the STF damping fluid is filled in the gap between the steel tooth 2 and the steel spacer 6 and has a height exceeding the baffle 2.

The viscous damper has good energy consumption performance, and produces shearing action on the viscous damping fluid inside through up-and-down movement of the steel teeth, so that the damping characteristic of the viscous damper is changed, when the steel teeth move up and down, the damping fluid can flow into a space between the baffle and the upper cover, the influence of fluid pressure is reduced, the STF damping fluid characteristic depends on the shearing strain rate, and under the action of an earthquake, when the structural vibration frequency is higher, the shearing strain rate increases the STF viscosity to be strengthened, and the high energy consumption effect is realized.

Finally, the description is as follows: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; the technical solutions described in the foregoing embodiments can be modified by those skilled in the art, or some technical features of the embodiments can be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A shear type STF damper is characterized by comprising an upper connecting plate (1), steel teeth (2), a steel sleeve (5), an upper cover (3), a baffle (4) and a steel spacer (6);

the steel sleeve (5) is provided with a plurality of steel spacers (6), the steel sleeve (5) is welded with a stop door (7), and the stop door (7) is fixedly connected with the steel spacers (6);

the steel tooth (2) is provided with a plurality of tooth sheets, the steel tooth (2) is inserted into a gap of the steel spacer (6), a baffle (4) for limiting the steel tooth (2) is arranged at the upper part of the steel spacer (6), and the baffle (4) is fixedly connected with the steel sleeve (5);

the upper cover (3) is fixedly connected with the top end of the steel sleeve (5), and the waist part of the upper cover (3) is provided with an open slot for the steel teeth (2) to pass through; the steel teeth (2) are connected with the open grooves in a dry friction sliding fit mode, and the tops of the steel teeth (2) are fixedly connected with the upper connecting plate (1).

2. A shear-type STF damper according to claim 1,

the steel sleeve (5) is filled with STF damping fluid.

3. A shear-type STF damper according to claim 1,

the gap between the steel tooth (2) and the steel spacer (6) is 1-2 mm.

4. A shear-type STF damper according to claim 1,

the head of the tooth sheet of the steel tooth (2) is square, and the tail is a long handle.