CN101333829A - Vertical limit type lead shear three-dimensional vibration isolation device - Google Patents

Abstract

The invention relates to a vertical limit type lead shear three-dimensional vibration isolation device, which belongs to the field of structure isolation control and vibration control. In the present invention, the contact part between the disc spring outer guide rod and the outer sealing steel plate in the vertical vibration isolation device is set as a splint type lead shear damper. The upper connecting plate of the three-dimensional vibration isolation device vibrates in the vertical direction under the excitation of the vertical load, and this vibration drives the shear deformation of the lead block, thereby providing vertical damping force for the three-dimensional vibration isolation device. At the same time, a vertical limiter is set between the outer guide rod and the outer sealing steel plate, which can effectively control the rebound of the instantaneous disc spring. The limiter also has the effect of a splint, and applies a horizontal preload to the structure to prevent the lead from yielding. Squeeze lost. The invention has simple structure and stable performance, and can be applied to the secondary vibration of buildings induced by traffic and any occasion where the existing three-dimensional shock isolation device is applicable to isolate ground vibration and reduce the dynamic response of structures and equipment.

Description

Vertical limit type lead shear three-dimensional vibration isolation device

technical field

The invention relates to a vertical limit type lead shear three-dimensional vibration isolation device. The device is composed of a lead core laminated rubber support, a disc spring, a lead damper and a vertical limiter, and has a vertical limiter. It is mainly used for foundation vibration isolation of buildings such as houses and bridges, and can also be used for equipment vibration isolation. The invention belongs to the field of structure isolation control and vibration control.

Background technique

The seismic isolation device "isolates" the superstructure of the building from the foundation, changes the dynamic characteristics of the superstructure, and can greatly reduce the dynamic effect of the earthquake on the superstructure, thereby achieving the shock absorption effect of "overcoming rigidity with softness". There are many studies on vibration isolation devices for building foundations, but they mainly focus on the horizontal vibration isolation direction. There are not many three-dimensional vibration isolation devices that can effectively isolate vertical vibration. The seismic isolation of lead core laminated rubber bearings in the horizontal direction is a relatively mature engineering horizontal isolation technology, which provides damping force through the shear deformation of the lead core and dissipates the horizontal seismic energy. In the vertical direction, thick rubber laminated rubber bearings or disc springs can only reduce the vertical stiffness of the structure, but do not provide vertical damping, cannot effectively dissipate the vertical energy of the earthquake, and cannot suppress the amplification of the resonance area At present, most of the vibration isolation lead dampers used in disc springs are built-in dampers, which are inconvenient for processing, installation, monitoring and maintenance. In addition, the disc spring device is a loosely connected system, and there is a situation of upward rebound. Improper control will cause the vibration isolation function of the system to fail.

Contents of the invention

In order to overcome the situation that the existing three-dimensional vibration isolation device cannot effectively provide vertical damping, the position of the damper is unreasonable, and the rebound of the disc spring causes the actual effect of the vibration isolation device, the present invention provides a new type of three-dimensional vibration isolation device. The three-dimensional vibration isolation device can not only effectively provide vertical damping, but also facilitate installation, inspection and maintenance, and can control the vertical displacement to ensure the normal operation of the device.

In order to achieve the above object, the present invention adopts the following technical solutions. The invention comprises an upper connection plate fixedly connected with the upper structure, a lead core laminated rubber support, a disc spring and a lower connection plate; the upper part of the lead core laminated rubber support is fixedly connected with the upper connection plate, and the lower part is fixed with the lower structure connect. The disc spring is placed between the upper connecting plate and the lower connecting plate and is limited by an inner guide rod fixedly connected with the upper connecting plate and an outer guide rod fixedly connected with the lower connecting plate. It also includes an outer sealing steel plate fixedly connected with the upper connecting plate, which is arranged on the outer side of the outer guide rod. Grooves are arranged on the corresponding positions of the outer sealing steel plate and the outer guide rod, and lead weights are poured into the grooves.

Both sides of the outer guide rod are horizontally provided with a through hole through the outer guide rod, the diameter of the through hole is larger than the diameter of the limit screw, the limit screw is arranged in the through hole and its two ends pass through the through hole and The outer sealing steel plate is fixedly connected. The limit screw rod can move together with the outer sealing steel plate, and the limit screw rod can move up and down in the through hole of the outer guide rod, and the limit screw rod can move up and down until the disc spring is completely free of force, and limit down until the disc spring is completely flattened.

The groove on the outer sealing steel plate penetrates through the outer sealing steel plate, and a lead sealing steel plate for sealing the lead block in the groove is fixedly connected to the outer side of the outer sealing steel plate.

In the present invention, a lead shear damper is arranged inside the outer guide rod and the upper sealing steel plate. The upper connecting plate of the three-dimensional vibration isolation device vibrates in the vertical direction under the excitation of the vertical load, and this vibration drives the shear deformation of the lead block, thus providing vertical damping force for the three-dimensional vibration isolation device. At the same time, a vertical limiter is set between the outer guide rod and the outer seal steel plate, and through holes are set on both sides of the outer guide rod. The two ends of the limit screw are fixedly connected with the outer seal steel plate and move together with the outer seal steel plate. The limit screw It can move up and down in the through hole of the outer guide rod, the upward limit is until the disc spring is completely unstressed, and the downward limit is until the disc spring is completely flattened. The limit screw can effectively control the rebound of the instantaneous disc spring. The limit device also has the effect of a splint, which applies a horizontal preload to the structure to prevent the loss of extrusion after the lead yields.

The beneficial effects of the present invention are: the lead damper in the present invention provides vertical damping, and its position is convenient for installation, maintenance and detection; the use of the limit screw ensures the normal use function of the system in the case of large displacement, without Loss of control can occur when the disc springs rebound. At the same time, excessive lead loss can be avoided, providing guarantee for the normal use of the device.

The present invention has the advantages of simple structure, stable performance, strong practicability and wide application range, and can be applied to the secondary vibration of buildings induced by traffic and any occasions where the existing three-dimensional seismic isolation device is applicable to isolate ground vibration and reduce structural vibration. At the same time, it can be applied to the bottom of the vibration equipment to isolate the vibration impact of equipment vibration on the surrounding environment.

Description of drawings

Fig. 1 shows the plan view of the present invention

Figure 2 shows the A-A sectional view of Figure 1

Fig. 3 shows the B-B sectional view of Fig. 1

In the figure: 1. Upper connecting plate, 2. Lower connecting plate, 3. Disc spring, 4. Vertical limit screw, 5. Lead block, 6. Lead sealing plate, 7. Lead sealing bolt, 8. Limit Nut, 9, outer guide rod, 10, inner guide rod, 11, outer sealing steel plate, 12, connecting bolt, 13, lead core laminated rubber bearing.

specific embodiment

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

This embodiment is a three-dimensional vibration isolation device with a vertical vibration isolation function composed of a lead core laminated rubber horizontal vibration isolation support, a disc spring and a lead damper. The specific structure is shown in Figures 1 to 3, including outer guide rod 9, outer sealing steel plate 11, upper connecting plate 1, lower connecting plate 2, lead core laminated rubber bearing 13 and disc spring 3. The upper connecting plate 1 is fixedly connected with the upper structure. The lower part of the lead-core laminated rubber support 13 is fixedly connected with the lower structure, and the upper part is fixedly connected with the lower connecting plate 2 through connecting bolts 12 . The disc spring 3 is placed between the upper connecting plate 1 and the lower connecting plate 2, and is limited left and right by the inner guide rod 10 and the outer guide rod 9, the inner guide rod 10 is rigidly connected with the upper connecting plate 1, and the outer guide rod 9 is just connected with lower connecting plate 2. The outer guide rod 9 and the inner guide rod 10 are the guide devices of the disc spring 3, and the surface of the outer guide member 9 and the inner guide rod 10 in contact with the disc spring 3 should ensure a small enough friction coefficient, thereby ensuring that the disc spring 3 free swipe. Disc spring 3 has certain space with the edge of outer guide rod 9 and inner guide rod 10, to guarantee the horizontal displacement of disc spring.

As shown in FIGS. 2 and 3 , the outer sealing steel plate 11 is rigidly connected to the upper connecting plate 1 and is arranged outside the outer guide rod 9 . Rectangular grooves are arranged on both parts where the outer sealing steel plate 11 and the outer guide rod 9 contact, and the groove on the outer sealing steel plate 11 runs through the outer sealing steel plate, and lead is poured into the groove of the outer sealing steel plate 11 and the outer guide rod 9 Block 5, lead block 5 is sealed in the rectangular groove by lead sealing steel plate 6. The lead-sealed steel plate 6 guarantees that lead is conveniently filled, and the working condition of lead damping can be checked at any time during use, and lead can be replenished at any time.

As shown in FIG. 1 , a through hole penetrating through the outer guide rod 9 is arranged horizontally on both sides of the outer guide rod 9 , and the limit screw 4 is disposed in the through hole, and the diameter of the through hole is larger than the diameter of the limit screw 4 . Bolt holes are arranged at the positions corresponding to the two ends of the outer sealing steel plate 11 and the limit screw 4, and the two ends of the limit screw 4 pass through the through holes on the outer guide rod 9 and the bolt holes on the outer seal steel plate 11, and pass through The limit nut 8 is tightened so that it is fixedly connected with the outer sealing steel plate 11. The limit screw 4 can move together with the outer sealing steel plate 11, the limit screw 4 can move up and down in the through hole of the outer guide rod 9, the upward limit is completely unstressed to the disc spring, and the downward limit is completely flattened to the disc spring. The limit screw 4 has the function of vertical limit, and has the function of horizontal preloading and adjusting the gap between the outer guide rod 9 and the outer sealing steel plate 11 at any time, so as to ensure that no lead leakage occurs during use.

In this embodiment, the upper connecting plate 1 is connected with the upper structure of the building, and transmits the self-weight of the building to the horizontal vibration isolation device through its surface in contact with the disc spring and then to the building foundation. The outer sealing steel plate 11 of the upper connecting plate 1 has sufficient thickness so that the horizontal stiffness of the vertical vibration isolation device can be improved, and the rigidity requirements of the system can be met after setting lead block grooves. The vertical limit screw 4 provides horizontal stiffness in another direction, and the through hole of the outer guide rod 9 should be smooth to ensure that the vertical limit screw 4 moves without resistance in the through hole.

In this embodiment, a rectangular lead shear damper is provided in the outer guide rod 9 and the outer sealing steel plate 11 to provide vertical damping for the three-dimensional vibration isolation device, and a splint type vertical stopper is also arranged between the outer guide rod 9 and the outer sealing steel plate 11 , so as to ensure that the three-dimensional vibration isolation device will not lose control when the disc spring rebounds.

In the limit-type lead-shearing three-dimensional vibration isolation device in this embodiment, the diameter of the disc spring is slightly smaller, and multiple disc springs are required to be stacked and combined to provide suitable vertical stiffness and control the height of the vibration isolation device as much as possible. So as to be able to work safely and stably. The device adjusts the vertical stiffness by changing the parameters of the disc spring, and adjusts the vertical damping by changing the groove area of the shear damper to achieve the purpose of effectively isolating vibration. To ensure the perfect work of the vertical vibration isolation device, at the same time, the cube shear damper can be pre-compressed to ensure the working efficiency of the lead damper. The three-dimensional vibration isolation device proposed by the invention has a simple structure, easy design, processing and installation, convenient inspection and maintenance, and is an effective vibration isolation control device.

Claims (3)

1, vertical spacing-type lead shearing three-dimensional vibration isolation device comprises upper junction plate (1), lead rubber bearing (13), disk spring (3) and the lower connecting plate (2) of fixedlying connected with superstructure; Fixedlying connected with upper junction plate (2) in the top of lead rubber bearing (13), fixedlys connected with substructure in the bottom; Disk spring (3) is placed between upper junction plate (1) and the lower connecting plate (2) and carries out spacing by the interior guide peg (10) of fixedlying connected with upper junction plate (1) with the outer guide peg (9) of fixedlying connected with lower connecting plate (2); It is characterized in that: also include and be arranged on outer guide peg (9) covering steel plate (11) outside, that fixedly connected with upper junction plate (1), covering steel plate (11) and outside the corresponding position of guide peg (9) the two be provided with groove, in groove, be perfused with lead (5).

2, vertical spacing-type lead shearing three-dimensional vibration isolation device as claimed in claim 1, it is characterized in that: the both sides along continuous straight runs of guide peg (9) is provided with through the through hole of outer guide peg (9) outside, the diameter of through hole is greater than the diameter of spacing screw rod (4), and spacing screw rod (4) is arranged in this through hole and its two ends are passed this through hole and fixedlyed connected with covering steel plate (11).

3, vertical spacing-type lead shearing three-dimensional vibration isolation device as claimed in claim 1, it is characterized in that: the groove on the described covering steel plate (11) runs through covering steel plate (11), the fixedly connected sealing lead steel plate (6) that is useful on lead in the sealed groove (5) in the outside of covering steel plate (11).

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