CN201649113U

CN201649113U - Spring for changing structural anti-seismic damping ratio

Info

Publication number: CN201649113U
Application number: CN 201020125101
Authority: CN
Inventors: 邱炜; 武守远; 石泽京; 赵波
Original assignee: China Electric Power Research Institute Co Ltd CEPRI; China EPRI Science and Technology Co Ltd
Current assignee: China Electric Power Research Institute Co Ltd CEPRI; China EPRI Science and Technology Co Ltd
Priority date: 2010-03-08
Filing date: 2010-03-08
Publication date: 2010-11-24
Anticipated expiration: 2020-03-08

Abstract

The utility model relates to a spring for changing structural anti-seismic damping ratio, which comprises a steel shaft sleeve, an inner shaft, a disk spring, a flange plate and pulling lugs. A first end plate and a second end plate are arranged at two ends of the steel shaft sleeve; a first pulling lug is arranged at one end of the inner shaft; an end plate is arranged at the other end of the inner shaft; the disk spring is sleeved outside the inner shaft; the steel shaft sleeve is sleeved outside the disk spring; two ends of the disk spring are respectively connected with the first end plate of the shaft sleeve and the end plate of the inner shaft in a contacting manner; the first pulling lug of the inner shaft penetrates out of a through hole on the first end plate; the flange plate is fastened with the second end plate of the steel shaft sleeve through a connecting part; and a second pulling lug is arranged on the flange plate. Under the action of a seism, the anti-seismic damping spring changes structural self-shock cycle by changing rigidity of self-structure, and effectively reduces horizontal seismic force influence coefficient, thereby achieving the purpose of reducing the damage influence of seismic action on the structure.

Description

Be used to change the spring of structural seismic damping ratio

Technical field

The utility model belongs to the supporting system field of power system high voltage power transmission large scale electrical power unit platform (power capacitor group), is specifically related to a kind of spring that is used to change the structural seismic damping ratio.

Background technology

In power system, in the large scale electrical power unit platform structures such as ac transmission series compensation device device structure and fault current limiter, because capital equipment is made up of the high-voltage capacitor group and the big bigger electric equipment of weight of metal oxide pressure-limiting device equal-volume of some, the bearing structure that these equipment that weigh tens tons move is an insulated platform, this open air platform not only requires to bear equipment gravity load and insulation against ground, and because carrying is important electric power facility, therefore also need to resist abominable natural conditions (as strong wind, icing, accumulated snow, geological process etc.) guarantee string benefit equipment safety operation, therefore, the safety of entire equipment structure shows important especially.

Natural objective condition is flexible and changeable, such as wind or geological process, when they act on our equipment, direction and size all are inhomogeneous variations, general for this reason structure need adopt effective lateral resistant member system to bear the horizontal loading of all directions usually, and each of large platform below that promptly is distributed in the carrying main equipment is perpendicular to tiltedly drawing member in the facade of horizontal plane.

Various horizontal side force for effective load bearing equipment structure, at present, in the facade tiltedly to draw member to adopt main material usually be glass fiber reinforced plastic circular cross-section rod member, the composite insulator that the outside simultaneously full skirt that is laminated with into elastomeric material combines, and owing to this scenario-frame simply is widely used.But, because the seismic response characteristic of structure also has substantial connection with natural conditions such as place characteristics, the same again focal mechanism of the ground motion characteristic in place, seismic forces equivalent, hypocentral distance distance etc. have relation, the importance of structure, equipment electric function are realized the lateral deformation size of structure is limited to some extent, thereby to comprehensive restriction of structure model selection and requirement.Structure model selection is restricted by structural meterials and execution conditions again simultaneously, and therefore, this is a comprehensive techno-economic question, should carefully take in.

The utility model content

For overcoming the defective of prior art, the purpose of this utility model is to provide good, simple in structure, with low cost being used to of a kind of effect to change the spring of structural seismic damping ratio.

For this reason, the utility model proposes a kind of spring that is used to change the structural seismic damping ratio, comprise the steel axle sleeve, interior axle, the dish spring, flange and draw ear, the two ends of described axle sleeve are provided with first end plate and second end plate, an end of axle is provided with first and draws ear in described, its other end is provided with end plate, the outer cover of axle is provided with the dish spring in described, the outer cover of described dish spring is provided with axle sleeve, the two ends of described dish spring touch mutually with first end plate of axle sleeve and the end plate of interior axle respectively, first of axle draws ear to pass from the through hole on first end plate in described, second end plate of described flange and axle sleeve is fastening by connector, and described flange is provided with second and draws ear.

Wherein, described dish spring is in series by disc spring film.

Wherein, described through hole is provided with a packing ring.

Wherein, described connector adopts connecting bolt.

The beneficial effects of the utility model are: under geological process, thereby antidetonation damping spring of the present utility model changes structure from the shake cycle by changing self structure rigidity, effectively reduced the horizontal seismic force influence coefficient, reduced geological process structural damage is influenced thereby reach.

Description of drawings

Fig. 1 is the front view of the utility model spring;

Fig. 2 is the left view of the utility model spring;

Fig. 3 is the right view of the utility model spring;

Fig. 4 is the vertical view of the utility model spring;

Fig. 5 is the internal construction schematic diagram of the utility model spring;

Fig. 6 is the structural representation of interior axle;

Fig. 7 is the structural representation of single disc spring film;

Fig. 8 is the elastic characteristic curve map of dish spring;

Wherein,

1-steel axle sleeve, 11-first end plate, 12-second end plate, the 13-through hole, the 14-packing ring,

Axle in the 2-, 21-first draws ear, the 22-end plate,

3-dish spring,

The 4-flange, 41-second draws ear,

The 5-connector.

The specific embodiment

Below in conjunction with accompanying drawing spring of the present utility model is further described in detail.

Shown in Fig. 1-6, spring described in the utility model comprises: steel axle sleeve 1, interior axle 2, dish spring 3, flange 4, connector 5 and La Er etc.The two ends of described steel axle sleeve 1 are provided with first end plate 11 and second end plate 12, an end of axle 2 is provided with first and draws ear 21 in described, its other end is provided with end plate 22, the outer cover of axle 2 is provided with dish spring 3 in described, the outer cover of described dish spring 3 is provided with steel axle sleeve 1, the two ends of described dish spring 3 touch mutually with first end plate 11 of axle sleeve and the end plate 22 of interior axle 2 respectively, first of axle draws ear 21 to pass from the through hole 13 on first end plate 11 in described, in order to strengthen sealing, at through hole 13 places one packing ring 14 is set, described flange 4 is fastening by connector 5 with second end plate 12 of steel axle sleeve, and described flange 4 is provided with second and draws ear 41.Described connector 5 is good to adopt connecting bolt.

In use, spring of the present utility model draws second on ear 21 and the flange 4 to draw ear 41 to be connected with the connector of Equipment Foundations and the diagonal member spare of lateral force resisting system respectively by interior axle last first, interior axle 2 passes the center hole of dish spring 3, steel axle sleeve 1 envelopes the outside of dish spring 3, and second end plate 12 of steel axle sleeve 1 fixed by the high strength connecting bolt with flange 4, the end plate 22 of interior axle contacts with the inboard of flange.Under the geological process operating mode, when the diagonal member spare that the antidetonation damping spring connects bears the axial tension that geological process causes, the both ends of the spring tension, that draws that ear 21 and second draws ear 41 this moment first is subjected to force direction opposite, and first draws in ear 21 pullings axially left movement, and 22 pairs of dish springs 3 of end plate of interior axle are exerted pressure, make it produce certain deformation, changed pull bar length and integrally-built rigidity, make structure finish by first vibration mode once freely shake time lengthening, reduced the damping ratio of structure.Especially for the earthquake on nearer earthquake of little shake, focus and the hard relatively place, this class earthquake disaster high frequency is abundant, and our damping spring just is can be by the dissipate seismic energy of high frequency of elastic deformation, alleviate the impact horizontal loading of high-frequency seism ripple, thereby guaranteed the safe bearing load and the power supply reliability of equipment under the earthquake operating mode of structure the device structure rod member.

Dish spring 3 has been adopted in the inside of spring described in the utility model, the dish spring is to be in series by center disc spring film with holes, as shown in Figure 7, the dish spring is the volute spring that a kind of purpose of hollow is born axial load, static load or dynamic loads kind that it can bear according to self are divided into several classes, the dish spring has small deformation and higher capacity, compare with the spring of other types and more to save the space, and the dish spring structure that the disc spring film matched combined by different parameters forms is flexible and changeable, can obtain comparatively ideal characteristic curve.Deflection h when flattening according to disk spring ₀Ratio with thickness t obtains different as shown in Figure 8 characteristic curves, and wherein Ronge for DIN springs represents the elastic range indicatrix, and abscissa is represented dish spring ratio of height to thickness, and ordinate is represented stress ratio.Just because of the dish spring has the nonlinear characteristic of very wide scope, so often be applied to heavy-duty machinery (as forcing press) and artillery, in the weapons such as aircraft, as brute force buffering and shock-absorbing spring, as the holddown spring of automobile and tractor clutch and safety valve, and the energy-storage travelling wave tube that is used as flexible apparatus.

Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. spring that is used to change the structural seismic damping ratio, it is characterized in that: this spring comprises steel axle sleeve (1), interior axle (2), dish spring (3), flange (4) and draw ear, the two ends of described steel axle sleeve (1) are provided with first end plate (11) and second end plate (12), an end of axle (2) is provided with first and draws ear (21) in described, its other end is provided with end plate (22), the outer cover of axle (2) is provided with dish spring (3) in described, the outer cover of described dish spring (3) is provided with steel axle sleeve (1), the two ends of described dish spring (3) touch mutually with first end plate (11) of axle sleeve and the end plate (22) of interior axle (2) respectively, first of axle draws ear (21) to pass from the through hole (13) on first end plate (11) in described, described flange (4) is fastening by connector (5) with second end plate (12) of steel axle sleeve, and described flange (4) is provided with second and draws ear (41).

2. spring according to claim 1 is characterized in that: described dish spring (3) is in series by disc spring film.

3. spring according to claim 1 and 2 is characterized in that: described through hole (13) locates to be provided with a packing ring.

4. spring according to claim 1 and 2 is characterized in that: described connector (5) adopts connecting bolt.