CN101736829B - A piezoelectric sleeve-type tension-compression bidirectional force active anti-seismic control device - Google Patents

Abstract

The piezoelectric sleeve-type tension-compression two-way active anti-seismic control device provided by the present invention includes an outer sleeve, a fastening force changing nut arranged on the upper part of the outer layer sleeve, and a first connection through the fastening force changing nut. rod; the second connecting rod arranged at the lower part of the outer sleeve; the outer sleeve is provided with a hollow inner sleeve, and a piezoelectric stack is placed in the inner sleeve; the upper end of the inner sleeve is fastened to The force-changing nut is fixedly connected by bolts; a first transmission end plate is arranged between the upper end of the inner sleeve and the upper end of the piezoelectric stack; a hinged second end plate is arranged between the lower end of the inner sleeve and the lower end of the piezoelectric stack. Two transmission end plates; the inner side of the lower end of the outer sleeve is provided with a projection that is in hinge contact with the second transmission end plate during movement. It solves the technical problem of low working efficiency of the anti-seismic control device, and has the advantages of strong adaptability to the environment and the like.

Description

A piezoelectric sleeve-type tension-compression bidirectional force active anti-seismic control device

technical field

The invention relates to the field of anti-seismic control of civil engineering, in particular to a piezoelectric sleeve-type active anti-seismic control device for tension and compression bidirectional force.

Background technique

With the increase in span, height and structure of buildings, higher requirements are placed on the safety and comfort of structures. Eliminating or reducing the influence of unfavorable factors through control technology has attracted more and more attention from designers. Among them, the application of passive and semi-active control technology in civil engineering has been well researched and applied, and it relies heavily on the driving The active control technology of the device is greatly limited due to factors such as slow response, small output, and small stroke of the traditional vibration control drive device. The traditional active anti-seismic control drive device can usually only achieve unidirectional compression anti-seismic control, and cannot meet the needs of large displacement and deformation. In addition, it has poor adaptability to the environment and low work efficiency.

Contents of the invention

In order to solve the technical problems of poor adaptability to the environment and low work efficiency of the existing active anti-seismic control device, the present invention provides a piezoelectric sleeve-type active anti-seismic control device under tension and compression bidirectional force.

Technical scheme of the present invention is as follows:

The piezoelectric sleeve-type tension-compression two-way active anti-seismic control device provided by the present invention includes an outer sleeve, a fastening power-changing nut arranged on the upper end of the outer layer sleeve, and a first connection through the fastening power-changing nut. rod; a second connecting rod arranged at the lower end of the outer sleeve; an inner sleeve with a hollow structure is arranged in the outer sleeve, and a piezoelectric stack is placed in the inner sleeve; the inner sleeve The upper end of the sleeve and the fastening force changing nut are fixedly connected by bolts; a first transmission end plate is arranged between the upper end of the inner layer sleeve and the upper end of the piezoelectric stack; the lower end of the inner layer sleeve and the piezoelectric stack A hinged second transfer end plate is arranged between the lower ends of the stack; a projection is arranged on the inner side of the lower end of the outer sleeve to contact the second transfer end plate hinge during movement.

According to a preferred technical solution of the present invention, gaps are provided between the upper and lower ends of the outer sleeve and the inner sleeve.

According to a preferred technical solution of the present invention, bolts are provided between the upper and lower ends of the outer sleeve and the inner sleeve.

According to a preferred technical solution of the present invention, the hinge is semi-spherical.

According to a preferred technical solution of the present invention, the piezoelectric stack is a cuboid or a cylinder.

The advantages of the present invention are as follows:

1. Using the piezoelectric stack, a new type of intelligent material, to be applied to the active control system of civil engineering has realized a new way of structure anti-seismic, and has good flexibility, intelligence, high efficiency and adaptability to the environment in the process of active control Ability and other advantages.

2. The structure is simple and practical, and the performance is reliable. The tensile force is converted into pressure to give full play to the good performance of the piezoelectric stack, which is more in line with the characteristics of the seismic performance of civil structures.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the sectional view of A-A direction of the present invention;

Fig. 3 is the sectional view of B-B direction of the present invention;

Fig. 4 is a cross-sectional view along C-C direction of the present invention.

Explanation of reference signs:

Outer sleeve 1, fastening force changing nut 2, first connecting rod 3; second connecting rod 4, first bump 601; bolt 5; inner sleeve 6, second bump 401; piezoelectric stack 7 , The first transmission end plate 8; the second transmission end plate 9; hinge 10; adjusting bolt 11.

Detailed ways:

The present invention will be further described below in conjunction with accompanying drawing:

Referring to Fig. 1-Fig. 4, the piezoelectric sleeve-type two-way active anti-seismic control device provided by the present invention includes an outer sleeve 1, and a fastening force changing nut 2 arranged on the upper end of the outer sleeve 1 passes through the Fasten the first connecting rod 3 of the force-changing nut 2; the second connecting rod 4 arranged at the lower end of the outer sleeve 1; the outer sleeve 1 is provided with an inner sleeve 6 with a hollow structure, and the inner sleeve A piezoelectric stack 7 in the shape of a cuboid or cylinder is placed inside 6; the upper end of the inner sleeve is fixedly connected to the fixed force nut 2 through bolts 5; the upper end of the inner sleeve 6 and the upper end of the piezoelectric stack 7 are arranged There is a first transmission end plate 8; a second transmission end plate 9 with a hemispherical hinge 10 is provided between the lower end of the inner sleeve 6 and the lower end of the piezoelectric stack 7; The first protrusion 601 that contacts the first transfer end plate 8 during movement; the inner side of the lower end of the outer sleeve 1 is provided with an elliptical second protrusion that contacts the hinge 10 of the second transfer end plate 9 during movement. Block 401. Adjusting bolts 11 are arranged between the upper and lower ends of the outer sleeve and the inner sleeve. Since the piezoelectric material has positive and negative piezoelectric effects, it can be used as both a sensor and a driver. However, the piezoelectric gauge coefficient of a general piezoelectric material is very small, and the output displacement is small even if a large voltage is applied. The piezoelectric stack in this application is a structure in which multiple sets of piezoelectric sheets are mechanically connected in series and electrically connected in parallel, which enables the displacement generated by each piezoelectric sheet to be superimposed and output, increasing the displacement output.

The working principle of the present invention is as follows:

The present invention is suitable for active anti-seismic control of structures, and is embedded in the middle of ordinary rods of the structure. The first connecting rod and the second connecting rod are respectively connected to the ordinary rods to transmit tension or pressure, and fasten the force-changing nut 2 and the inner layer. The upper end of the sleeve 6 is fixedly connected by the bolt 5; when the rod is under pressure, the lower end of the outer sleeve and the upper end of the inner sleeve move relatively, and the piezoelectric stack is pressed; when the first connecting rod and the second connecting rod When the rod is pulled, the upper end of the outer sleeve moves relative to the lower end of the inner sleeve, which also presses the piezoelectric stack. Therefore, the characteristic of good pressure performance of the piezoelectric stack is brought into full play. The force is transmitted between the inner and outer sleeve end plates and the piezoelectric stack through the first transfer end plate and the second transfer end plate, between the first transfer end plate and the piezoelectric stack and between the second transfer end plate and the inner sleeve The force can be transmitted through the semicircular spherical hinge, and the hinge can be realized, thereby avoiding the transmission of bending moment. When the adjusting bolt is tightened, the outer sleeve and the inner sleeve work together, which is a common component at this time.

According to the characteristics of strong compressive performance of the piezoelectric stack, the present invention converts the tensile force into a pressure and does not bear the bending moment. The piezoelectric anti-seismic device overcomes the similar active anti-seismic control devices in the past that can only realize one-way anti-seismic control, and cannot meet the relatively high requirements. For the problem of large displacement and deformation requirements, the technical solution provided by the present invention is more in line with the mechanical characteristics of civil engineering structures, and can better improve the seismic performance of structures under seismic loads.

The above content is a further detailed description of the present invention in combination with specific preferred technical solutions, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (5)

1. a piezoelectric telescope-feed tension compression bidirectional stress initiative anti-seismic control device comprises outer layer sleeve, is arranged at the fastening force changing nut of outer layer sleeve upper end, passes the head rod of fastening force changing nut; Be arranged at second connecting rod of outer layer sleeve bottom; It is characterized in that: be provided with the inner layer sleeve of hollow structure in the said outer layer sleeve, be placed with piezoelectric pile in the said inner layer sleeve; The upper end and the fastening force changing nut of said inner layer sleeve are connected through bolt; Be provided with first transmission end plate between said inner layer sleeve upper end and the piezoelectric pile upper end; Be provided with second transmission end plate of band hinge between said inner layer sleeve bottom and the piezoelectric pile bottom; Said inner layer sleeve upper surface inwall is provided with in motion process and contacted first projection of first transmission end plate; Inboard, said outer layer sleeve lower surface is provided with in motion process and cuts with scissors contacted second projection with second transmission end plate.

2. a kind of piezoelectric telescope-feed tension compression bidirectional stress initiative anti-seismic control device according to claim 1 is characterized in that: be provided with the space between described outer layer sleeve and the inner layer sleeve upper/lower terminal.

3. a kind of piezoelectric telescope-feed tension compression bidirectional stress initiative anti-seismic control device according to claim 2 is characterized in that: between described outer layer sleeve and the inner layer sleeve upper/lower terminal adjusting bolt is set.

4. a kind of piezoelectric telescope-feed tension compression bidirectional stress initiative anti-seismic control device according to claim 3 is characterized in that: said hinge is that semicircle is spherical.

5. a kind of piezoelectric telescope-feed tension compression bidirectional stress initiative anti-seismic control device according to claim 4 is characterized in that: said piezoelectric pile is cuboid or cylinder.

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