Friction type support for floating system

Abstract

The utility model relates to the technical field of supports, and provides a friction type support for a floating system, which aims at solving the problems that in the existing floating system and semi-floating system bridges, when a vehicle quickly passes through a beam end expansion joint, the bridge longitudinally moves, the driving comfort and safety are influenced, and the bridge structure is influenced. Comprising a support body, and friction damping components are arranged on the two sides of the support body in the transverse bridge direction. The support body comprises an upper structure and a lower structure, the lower structure comprises a ball basin and a bottom plate, and the ball basin and the bottom plate can relatively slide in the longitudinal direction; the friction damping component comprises a friction plate located between the ball basin and the inner side wall of the bottom plate, a pressing plate and a pressing part, the friction plate is installed on the ball basin, the pressing part is connected to the bottom plate, the pressing plate is pressed on the friction plate through the pressing part, and a sliding pair is formed between the pressing plate and the friction plate; longitudinal movement of the bridge can be effectively restrained, driving comfort is improved, and safety of the bridge structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of supports, in particular to a friction type support for a floating system. Background Art

[0002] With the continuous growth of traffic demand, the continuous improvement of road grades and the expansion of construction scale, bridges are showing a development trend of increasing spans, enriching bridge types and becoming lighter in structure. At the same time, more and more attention is paid to the economy and comprehensive benefits of bridge construction. In the design of large-span bridges, cable-stayed bridges and suspension bridges, as a cable system, have a larger span capacity than beam bridges, rigid frame bridges and arch bridges. Their rigid and flexible structures conform to the characteristics of material stress, making them the preferred bridge types for large-span bridges. According to different bridge design schemes, the structural systems of cable-stayed bridges and suspension bridges are divided into four structural systems: floating system (tower-pier consolidation, tower-beam separation), semi-floating system (tower-beam separation, vertical support is set at the main beam under the pier-tower), tower-beam consolidation system (pier-beam consolidation, tower-pier separation) and rigid frame system (beam, tower, pier consolidation). Among them, floating system and semi-floating system are particularly widely used.

[0003] In floating and semi-floating bridges, the bridge beam has low rigidity and light weight. When a vehicle passes through the expansion joint at the beam end quickly, the impact of the vehicle will cause the bridge to move longitudinally, affecting the driving comfort and safety, and also having a certain impact on the life of the bridge structure. It is usually used to install dampers at the beam ends to suppress the longitudinal vibration of the bridge caused by vehicle impact. However, the damper is expensive and requires a large installation space. It is also necessary to set up a special installation base at the beam end, which increases the difficulty of bridge layout. Utility Model Content

[0004] The utility model aims to provide a friction type bearing for a floating system, so as to solve the problem that in existing floating system and semi-floating system bridges, the bridge beam has low rigidity and light weight. When a vehicle passes through the expansion joint at the end of the beam quickly, the impact of the vehicle causes the bridge to move longitudinally, which affects the comfort and safety of driving and the bridge structure.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The utility model provides a friction type support for a floating system, comprising a support body, wherein friction damping components are arranged on both sides of the cross bridge of the support body;

[0007] The support body comprises an upper structure and a lower structure, wherein the lower structure comprises a ball basin and a bottom plate, and the ball basin and the bottom plate can slide relative to each other in the longitudinal direction;

[0008] The friction damping component includes a friction plate, a pressure plate and a clamping component located between the ball basin and the inner side wall of the base plate. The friction plate is installed on the ball basin, the clamping component is connected to the base plate, the pressure plate is pressed on the friction plate through the clamping component, and a sliding pair is formed between the pressure plate and the friction plate.

[0009] In order to cope with the longitudinal movement of the bridge caused by the impact of vehicles, the utility model configures friction damping components on both sides of the support in the transverse direction of the bridge. The friction force in the friction damping component provides damping force in the direction of the bridge (longitudinal), which can effectively suppress the vibration of the bridge caused by the impact force of the bridge generated by the passage of vehicles. The force in the case of temperature displacement and seismic displacement will be much greater than the friction force provided by the friction plate, so that the support can also adapt to temperature displacement and seismic displacement. At the same time, in the earthquake state, the damping force generated can also reduce the impact caused by the earthquake and better protect the bridge.

[0010] As the preferred technical solution:

[0011] A plurality of the friction damping members are arranged on both sides of the ball basin.

[0012] As the preferred technical solution:

[0013] The pressing component comprises a pressing block, the pressing block is connected to the bottom plate, and an elastic telescopic member is installed between the pressing block and the pressing plate.

[0014] As the preferred technical solution:

[0015] The elastic expansion member is a disc spring.

[0016] As the preferred technical solution:

[0017] A slide rail groove is provided at the bottom of the ball basin, and the opening direction of the slide rail groove is along the bridge direction. A slide rail is formed on the top surface of the bottom plate, and the slide rail is adapted to the slide rail groove.

[0018] As the preferred technical solution:

[0019] A guide strip is installed on the inner wall surface of the slide rail groove, a guide plate is installed on the slide rail, and a sliding pair is formed between the guide strip and the guide plate.

[0020] As the preferred technical solution:

[0021] The guide bar is a guide stainless steel bar.

[0022] As the preferred technical solution:

[0023] A slide plate is installed in the groove of the bottom surface of the ball basin, and metal plates are installed on the planes on both sides of the slide rail on the bottom plate, and the slide plate and the metal plates form a sliding pair.

[0024] As the preferred technical solution:

[0025] The metal plate is a bottom plate stainless steel plate.

[0026] As the preferred technical solution:

[0027] The support body is a spherical support or a pot-type support.

[0028] As the preferred technical solution:

[0029] When the support body is a spherical support, the upper structure includes an upper support plate and a spherical crown lining plate, a flat slide plate is arranged between the upper support plate and the spherical crown lining plate, and a spherical slide plate is arranged between the spherical crown lining plate and the ball basin.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0031] The friction-type bearing of the utility model adds a longitudinal damping function on the basis of the traditional ball bearing or basin bearing, and the damping force can be adjusted by configuring different friction materials, configuring different disc springs and presetting different preloads. The adjustment range is large, and at the same time, the friction surface can be increased to improve the wear life. It can effectively suppress the longitudinal movement of floating system or semi-floating system bridges caused by external loads, improve driving comfort, and improve the safety and service life of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the friction type support for the floating system described in the utility model in the transverse direction of the bridge.

[0033] Figure 2 This is a schematic structural diagram of the friction type support for the floating system described in the utility model along the bridge direction.

[0034] Icon: 1-upper support plate, 2-first circular sealing ring, 3-top plate mirror stainless steel plate, 4-flat slide plate, 5-ball crown lining plate, 6-spherical slide plate, 7-ball basin, 8-friction plate, 9-pressure plate, 10-disc spring, 11-pressure block, 12-bottom plate, 13-rectangular sealing ring, 14-bottom plate stainless steel plate, 15-rectangular slide plate, 16-guide plate, 17-guide stainless steel bar, 18-anchor bolt, 19-sleeve, 20-anchor rod. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, this embodiment proposes a friction-type bearing for a floating system, including an upper bearing plate 1, a first circular sealing ring 2, a top plate mirror stainless steel plate 3, a flat slide plate 4, a spherical crown lining plate 5, a spherical slide plate 6, a ball basin 7, a friction plate 8, a pressure plate 9, a disc spring 10, a clamping block 11, a bottom plate 12, a rectangular sealing ring 13, a bottom plate stainless steel plate 14, a rectangular slide plate 15, a guide plate 16, a guide stainless steel bar 17, an anchor bolt 18, a sleeve 19, an anchor rod 20 and a second circular sealing ring.

[0038] Among them, the upper support plate 1 is used to be connected to the bottom of the bridge beam. The bottom surface of the upper support plate 1 is provided with a basin cavity, and the top plate mirror stainless steel plate 3 is arranged in the basin cavity. The top plate mirror stainless steel plate 3 is welded to the upper support plate 1.

[0039] The first circular sealing ring 2 and the plane slide plate 4 are installed in the groove on the top surface of the spherical crown lining plate 5. The first circular sealing ring 2 is located around the plane slide plate 4. The plane slide plate 4 is slidably connected to the top plate mirror stainless steel plate 3.

[0040] Below the spherical crown lining plate 5 is the spherical basin 7, the spherical slide plate 6 and the second circular sealing ring are installed in the groove on the top surface of the spherical basin 7, and the second circular sealing ring is located around the spherical slide plate 6. The spherical slide plate 6 is fixed on the spherical basin 7, and the bottom surface of the spherical crown lining plate 5 is rotatably connected to the spherical slide plate 6.

[0041] The rectangular sealing ring 13 and the rectangular slide plate 15 are installed in the groove on the bottom surface of the ball basin 7 , and the rectangular sealing ring 13 is located around the rectangular slide plate 15 .

[0042] Furthermore, a slide rail groove is opened at the bottom of the ball basin 7, and the slide rail groove is located in the middle of the bottom surface of the ball basin 7. The opening direction of the slide rail groove is along the longitudinal direction (longitudinal direction), and the guide stainless steel bar 17 is welded on the inner wall surface of the slide rail groove.

[0043] The top surface of the bottom plate 12 is formed with a slide rail, the slide rail is matched with the slide rail groove, the guide plate 16 is installed on the surface of the slide rail, and the guide stainless steel bar 17 is slidably connected with the guide plate 16. The ball basin 7 and the bottom plate 12 form a first sliding pair through the slide rail to provide longitudinal displacement guidance.

[0044] The bottom plate stainless steel plate 14 is welded to the planes on both sides of the slide rail on the bottom plate 12 , and the bottom plate stainless steel plate 14 is slidably connected with the rectangular slide plate 15 , and the bottom plate stainless steel plate 14 and the rectangular slide plate 15 form a second sliding pair.

[0045] The friction plates 8 are installed on both sides of the ball basin 7. The pressing block 11, the disc spring 10 and the pressing plate 9 are arranged between the friction plate 8 and the inner side wall of the bottom plate 12. The pressing block 11 is connected to the bottom plate 12 by bolts. The pressing plate 9 is pressed on the friction plate 8. The disc spring 10 is installed between the pressing block 11 and the pressing plate 9. Further, a pressing groove is arranged on the pressing block 11. The disc spring 10 is located in the pressing groove. The two ends of the disc spring 10 are respectively in contact with the pressing block 11 and the pressing plate 9. Different preload forces can be preset for the disc spring 10, so as to apply preload to press the pressing plate 9 on the friction plate 8. The pressing plate 9 and the friction plate 8 form a third sliding pair to provide friction. The friction force can be adjusted by configuring the pressing plate 9 and the friction plate 8 of different materials, configuring different disc springs 10 and presetting different preload forces.

[0046] After the support forms the third sliding pair, the pressure plate 9 is fixedly connected with the bottom plate 12, and the friction plate 8 is directly installed on the ball basin 7 at the same height as the pressure plate 9, and the friction plate 8 moves with the ball basin 7; when the bridge moves in the longitudinal direction due to the impact force generated during the passage of vehicles, the upper support plate 1 fixedly connected to the bottom of the beam will drive the ball basin 7 to move, and at this time, the friction plate 8 connected to the ball basin 7 will move with the ball basin 7, and the friction plate 8 and the pressure plate 9 will have relative sliding to generate friction in the opposite direction, which can effectively suppress the impact force generated by the passage of vehicles.

[0047] The base plate 12 is connected to the pier through the anchor bolts 18 and the anchor rods 20 , and the sleeve 19 is sleeved on the outside of the anchor rods 20 .

[0048] The friction bearing of the utility model is based on the spherical bearing and adds friction damping components on both sides of the longitudinal bridge. The spherical bearing bears and adapts to the displacement and rotation angle of the bridge. The friction damping component can preset an initial pressure according to the design requirements, and convert the friction resistance of the friction surface into a damping force for longitudinal movement, effectively suppressing the impact force generated by vehicle passage, and also reducing the damage caused by earthquake impact force to the bridge, so that the bearing can only be displaced under temperature stress or earthquake impact force, and the dynamic load of the bridge will not cause the displacement of the bearing, thereby improving the safety and service life of the bridge structure. The friction structure adopts a replaceable design to ensure the convenience of daily maintenance, and the bearing ball basin 7 is used as a part of the friction damping component to optimize the overall structure of the bearing, so that the bearing structure is simple and the cost is reduced.

[0049] When the support is a bidirectional support, a transverse sliding pair can be set between the upper support plate 1 and the ball basin 7, so that the support has friction damping force only in the longitudinal direction. While the support provides longitudinal damping force, it does not affect the transverse sliding displacement requirement of the support, thereby better meeting the needs of the floating system.

[0050] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A friction type bearing for a floating system, characterized in that: It comprises a support body, wherein the cross bridge of the support body is provided with friction damping components on both sides; The support body comprises an upper structure and a lower structure, wherein the lower structure comprises a ball basin and a bottom plate, and the ball basin and the bottom plate can slide relative to each other in the longitudinal direction; The friction damping component includes a friction plate, a pressure plate and a clamping component located between the ball basin and the inner side wall of the base plate. The friction plate is installed on the ball basin, the clamping component is connected to the base plate, the pressure plate is pressed on the friction plate through the clamping component, and a sliding pair is formed between the pressure plate and the friction plate.

2. The friction type bearing for a floating system according to claim 1, characterized in that: A plurality of the friction damping members are arranged on both sides of the ball basin.

3. The friction type bearing for a floating system according to claim 1, characterized in that: The pressing component comprises a pressing block, the pressing block is connected to the bottom plate, and an elastic telescopic member is installed between the pressing block and the pressing plate.

4. The friction type bearing for a floating system according to claim 3, characterized in that: The elastic expansion member is a disc spring.

5. The friction type bearing for a floating system according to claim 1, characterized in that: A slide rail groove is provided at the bottom of the ball basin, and the opening direction of the slide rail groove is along the bridge direction. A slide rail is formed on the top surface of the bottom plate, and the slide rail is adapted to the slide rail groove.

6. The friction type bearing for a floating system according to claim 5, characterized in that: A guide strip is installed on the inner wall surface of the slide rail groove, a guide plate is installed on the slide rail, and a sliding pair is formed between the guide strip and the guide plate.

7. The friction type bearing for a floating system according to claim 6, characterized in that: A slide plate is installed in the groove of the bottom surface of the ball basin, and metal plates are installed on the planes on both sides of the slide rail on the bottom plate, and the slide plate and the metal plates form a sliding pair.

8. The friction type bearing for a floating system according to claim 7, characterized in that: The metal plate is a bottom plate stainless steel plate.

9. The friction type bearing for a floating system according to claim 1, characterized in that: The support body is a spherical support or a pot-type support.

10. The friction type bearing for a floating system according to claim 9, characterized in that: When the support body is a spherical support, the upper structure includes an upper support plate and a spherical crown lining plate, a flat slide plate is arranged between the upper support plate and the spherical crown lining plate, and a spherical slide plate is arranged between the spherical crown lining plate and the ball basin.

Images