Spherical support with equal-displacement elliptical sliding plate friction pair and mounting structure of spherical support

Abstract

The spherical support comprises an upper support, a lower support and a spherical crown arranged in the top of the lower support, a plane friction pair is connected between the top of the spherical crown and the bottom of the upper support, and a curved surface friction pair is connected between the spherical crown and the lower support. The plane friction pair comprises an oval plane sliding plate fixed to the bottom of the upper support and a round plane on the top of the spherical crown. The oval plane sliding plate can move on the round plane in the long-axis or short-axis direction of the oval plane sliding plate. Limiting stop blocks are arranged on the two sides, in the short axis direction of the oval plane sliding plate, of the bottom of the upper support. According to the method, the problem of welding a plane stainless steel plate is solved, the troubles of unstable welding quality, easy generation of welding defects and the like caused by a welding process are avoided, meanwhile, the corresponding welding cost and time cost are reduced, and the manufacturing and mounting processes of the support are simpler, more convenient and more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of bridge equipment, and in particular to a spherical bearing with an equal-displacement elliptical sliding plate friction pair and a mounting structure thereof. Background Art

[0002] The bearing is an important component of the bridge structure and plays an important role in the process of connecting the upper and lower parts of the bridge. Among them, the spherical bearing is widely used in railway bridges because of its advantages such as large bearing capacity, flexible rotation, small rotation torque, large allowable rotation angle, wide applicable temperature range, long service life, and small maintenance workload. The spherical bearing not only plays an important role in transmitting loads, but also needs to reliably transmit the deformation (displacement and rotation angle) of the bridge superstructure to the bridge substructure. Specifically, a rotating friction pair is set at the convex spherical surface, and a plane friction pair is set between the top spherical crown plane and the upper bearing plate. In order to enhance the wear resistance and corrosion resistance of the friction components of the spherical bearing, a slide plate groove and a sealing ring groove are usually opened on the plane of the spherical crown, and the plane slide plate and the sealing ring are embedded in it. The plane mirror stainless steel plate and the plane slide plate are welded in the upper bearing plate of the bearing to form a plane friction pair, and the curved mirror stainless steel plate and the spherical slide plate in the lower bearing plate are welded at the convex spherical surface of the spherical crown to form a curved friction pair.

[0003] However, there are certain defects in welding mirror stainless steel plates. When welding curved mirror stainless steel plates, professional tooling is required to press the curved stainless steel plates, which increases the difficulty and cost of manufacturing. During welding, the surface finish and wear resistance of the mirror stainless steel are greatly reduced due to the influence of welding points, etc. At the same time, the curved mirror stainless steel plate is welded on all sides, and the middle part is hollowed out. Under the action of vertical load, the curved mirror stainless steel plate is at risk of cracking, and the performance cannot be guaranteed. At present, two integral ball crown support structures, aluminum alloy ball crown and chemical nickel-phosphorus alloy ball crown, have been proposed in China, which do not require welding of curved mirror stainless steel plates. However, the welding structure between the flat mirror stainless steel plate and the upper support still has the effects of hollowing in the middle and corrosion of welding points, which reduces the surface finish of the mirror stainless steel and has problems such as wear resistance. In addition, the support is divided into fixed support, longitudinal movable support, transverse movable support and multi-directional movable support according to its function. Among them, there is no restriction on the displacement of the longitudinal movable bearings and the multi-directional movable bearings in the longitudinal direction (the length direction of the bridge). When the bridge is subjected to external loads (seismic loads, wind loads, braking loads, etc.), the displacement transmitted to the upper part of the bridge exceeds the longitudinal displacement of the bearing, which will cause the upper and lower bearings to separate and lose their effectiveness, posing a serious safety hazard to the bridge.

[0004] With the continuous development of bridge engineering, the reliability requirements of bearings are getting higher and higher. How to solve the impact of stainless steel plate welding on the reliability and service life of bearings without changing the original installation dimensions of bearings, and improve the longitudinal seismic performance of bearings without increasing the difficulty and cost of construction is a problem that needs to be studied and solved urgently. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a spherical bearing that does not require welding of spherical and flat stainless steel plates, can effectively reduce the longitudinal dimensions of the bearing, has a longitudinal limit stopper, and prevents the longitudinal displacement of the bearing from exceeding a limited value. While meeting the vertical and horizontal bearing capacity, displacement and rotation requirements of the spherical bearing, the installation dimensions of the bearing are not changed.

[0006] To achieve this purpose, the spherical bearing with an equal-displacement elliptical slide friction pair designed in the present invention includes an upper bearing, a lower bearing and a spherical cap arranged in the top of the lower bearing, a plane friction pair is connected between the top of the spherical cap and the bottom of the upper bearing, a curved surface friction pair is connected between the spherical cap and the lower bearing, the plane friction pair includes an elliptical plane slide fixed to the bottom of the upper bearing and a circular plane at the top of the spherical cap, the elliptical plane slide can move on the circular plane along its major axis or minor axis direction; limited stop blocks are arranged on both sides of the minor axis direction of the elliptical plane slide at the bottom of the upper bearing.

[0007] Furthermore, the top surface of the spherical cap is located above the top surface of the lower support, and a sealing ring is fixed to the circumferential surface of the spherical cap located above the lower support, the top of the sealing ring contacts the bottom surface of the upper support, and the bottom of the sealing ring contacts the top surface of the lower support.

[0008] Furthermore, the top of the sealing ring extends toward the inner side of the top plane of the spherical cap, the bottom of the sealing ring extends toward the outer side of the top surface of the lower support, and the middle part of the sealing ring is an annular limiting structure that cooperates with the top circumferential surface of the spherical cap.

[0009] Furthermore, an elliptical slide plate groove is formed at the bottom of the upper support, and the upper portion of the elliptical plane slide plate is embedded and fixed in the slide plate groove.

[0010] Furthermore, the circular plane is arranged concentrically with the elliptical plane skateboard.

[0011] Furthermore, the outer surface of the spherical crown is plated with a nickel-phosphorus alloy, and the planar friction pair includes a circular nickel-phosphorus alloy surface of the circular plane and a bottom surface of the elliptical plane slide plate.

[0012] Furthermore, the curved surface friction pair includes a spherical nickel-phosphorus alloy surface of the spherical cap and a spherical mating surface located in the lower support and mating with the spherical nickel-phosphorus alloy surface of the spherical cap.

[0013] Furthermore, the top of the limit stopper is fixedly connected to the bottom of the upper support and is an integral structure with the upper support, and the bottom of the limit stopper extends toward the lower support, so that when the bridge undergoes longitudinal displacement, the limit stopper can limit the extreme position of the longitudinal movement of the upper support. The longitudinal direction here refers to the direction along the bridge.

[0014] Furthermore, a mounting structure of a spherical bearing with an equal-displacement elliptical slide friction pair includes a bridge, a pier and the above-mentioned spherical bearing with an equal-displacement elliptical slide friction pair, wherein the upper bearing is fixed to the bottom of the bridge and the lower bearing is fixed to the top of the pier.

[0015] Furthermore, the limit blocks are located on both sides of the bridge in the longitudinal direction of the bridge.

[0016] The beneficial effects of the present invention are as follows: the present invention solves the problem of welding flat stainless steel plates, avoids the troubles caused by the welding process, such as unstable welding quality and easy welding defects, and also reduces the corresponding welding cost and time cost, making the manufacturing and installation process of the support more simple and efficient. The elliptical flat slide friction pair structure can realize the equal displacement movement of the elliptical flat slide, effectively reducing the longitudinal size of the support. In some engineering scenes with strict space requirements, it can better meet the layout requirements and avoid the adverse effects on the surrounding structure or space utilization due to the excessive size of the support. While meeting the vertical and horizontal bearing capacity, displacement and rotation angle requirements of the spherical support, the original installation size of the support is not changed, and because the internal size of the support is reduced by the equal displacement structure of the flat friction pair, the structure of the limit stop block can be arranged, which means that the support can be directly replaced or applied without changing the related supporting structure design of the existing project, thereby improving the versatility and adaptability of the support, and facilitating the transformation and upgrading of existing projects and the standardized design and application of new projects. Limit blocks are set on both sides of the bottom of the upper support along the minor axis direction of the elliptical plane slide to prevent the longitudinal displacement of the support from exceeding the limit value, effectively constrain the longitudinal displacement of the support, ensure that the support operates within the normal working range, and improve the stability and safety of the entire structure. A sealing ring is fixed on the circumferential surface of the spherical crown located above the lower support. Its special structural design (the top extends toward the inside of the top plane of the spherical crown, the bottom extends toward the outside of the top surface of the lower support, and the middle part is an annular limit structure that cooperates with the circumferential surface of the top of the spherical crown) can play a good sealing role inside the support, prevent dust, water vapor and other external impurities from entering the interior of the support, avoid erosion, wear and other adverse effects on key components such as friction pairs, help to extend the service life of the support, and ensure its long-term stable working performance. The outer surface of the ball crown is plated with nickel-phosphorus alloy, and the flat friction pair and the curved friction pair respectively use corresponding nickel-phosphorus alloy mating surfaces. Nickel-phosphorus alloy has good wear resistance, corrosion resistance and other properties, which can reduce the friction coefficient between the friction pairs, reduce wear, improve the smoothness and reliability of the bearing during long-term use, and further ensure the stable performance of the bearing, displacement and other functions. For the installation structure of the spherical bearing with equal displacement elliptical slide friction pair, it clarifies the reasonable installation method of fixing the upper bearing to the bottom of the bridge and the lower bearing to the top of the pier, and the limit blocks are located on both sides of the bridge along the bridge. This layout and structural design conforms to the stress characteristics of the bridge structure and the actual use requirements, and can effectively transfer the load of the bridge to the pier, while ensuring the stability and safety of the bridge under various working conditions, providing strong support for the reliable operation of the entire bridge project. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the upper and lower supports connected along the bridge direction in the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a front view of the upper and lower supports connected in the transverse direction of the bridge in the present invention;

[0020] Figure 4 It is a front view of the upper support in the present invention;

[0021] Figure 5 A bottom view of the upper support in the present invention;

[0022] Figure 6 It is a front view of the spherical crown in the present invention;

[0023] Figure 7 is a top view of the spherical cap of the present invention;

[0024] Figure 8 It is a schematic diagram of the initial position of the elliptical plane slide plate in the circular plane in the present invention;

[0025] Fig. 9 It is a schematic diagram of the position of the elliptical plane slide after moving in the circular plane in the present invention;

[0026] Fig.10 It is a schematic diagram of the initial position of the circular plane slide plate in the circular plane in the present invention;

[0027] Fig.11 It is a schematic diagram of the position of the circular plane slide after moving in the circular plane in the present invention;

[0028] Among them, 1 is an upper support, 2 is a lower support, 3 is a spherical crown, 4 is an elliptical plane slide, 5 is a circular plane, 6 is a limit stopper, 7 is a sealing ring, 8 is a slide groove, 9 is a bridge, 10 is a bridge pier, and 11 is a circular plane slide. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0030] like Fig.10As shown in FIG. 11, if the circular plane slide plate 11 is fixed to the bottom of the upper support 1 and the circular plane 5 is opened on the top of the lower support 2, the longitudinal displacement (up and down direction in the figure) of the circular plane slide plate 11 is limited. The reason is that the upper part of the circular plane slide plate 11 is close to the edge of the circular plane 5, and the side of the circular plane slide plate 11 is far from the edge of the circular plane 5. When the circular plane slide plate 11 is Fig.10 Exercise to Fig.11 In the position shown, the upper part of the circular plane slide 11 is close to the edge of the circular plane 5, but the side of the circular plane slide 11 is far away from the edge of the circular plane 5. This structural design reduces the displacement of the circular plane slide 11 and reduces the longitudinal adjustment distance of the support. Therefore, the present invention adopts the matching structure of the elliptical plane slide 4 and the circular plane 5, such as Figure 8 As shown in FIG. 9, when the elliptical plane slide plate 4 is Figure 8 Position movement to Fig. 9 When the elliptical plane slide plate 4 is in the right position, the displacement of the elliptical plane slide plate 4 increases significantly. The reason is that the upper and side portions of the elliptical plane slide plate 4 are at equal distances from the edge of the circular plane 5, which can maximize the fit between the elliptical plane slide plate 4 and the edge of the circular plane 5, increase the displacement of the elliptical plane slide plate 4, and thus increase the longitudinal adjustment capability of the bearing for the bridge. At the same time, the longitudinal dimension of the bearing is reduced. The saved longitudinal dimension can be used to arrange the limit block 6, and does not occupy the size of the bearing, which is convenient for replacing the existing bearing and has universality. The elliptical slide plate is the core of this design. The size and diameter of the elliptical slide plate can be individually designed according to the different types of bearings, so as to achieve equal displacement movement of the elliptical slide plate 4, further reduce the internal dimensions of the bearing, and further, on the premise that the installation dimensions remain unchanged, add a longitudinal limit block 6.

[0031] like Figure 1As shown in FIG. 7 , in some embodiments, a spherical support with an equal displacement elliptical slide friction pair includes an upper support 1, a lower support 2, and a spherical cap 3 disposed in the top of the lower support 2. A plane friction pair is connected between the top of the spherical cap 3 and the bottom of the upper support 1, and a curved friction pair is connected between the spherical cap 3 and the lower support 2. An elliptical slide groove 8 is provided at the bottom of the upper support 1, and the upper part of the elliptical plane slide 4 is embedded and fixed in the slide groove 8. The top surface of the spherical cap 3 is located above the top surface of the lower support 2, and the outer surface of the spherical cap 3 is plated with a nickel-phosphorus alloy. The plane friction pair includes a circular nickel-phosphorus alloy surface of a circular plane 5 at the top of the spherical cap 3 and the bottom surface of the elliptical plane slide 4. The elliptical plane slide 4 can move in the circular plane 5 along its major axis or minor axis direction, and the circular plane 5 is arranged concentrically with the elliptical plane slide 4. The curved friction pair includes a spherical nickel-phosphorus alloy surface of the spherical cap 3 and a spherical mating surface located in the lower support 2 and mating with the spherical nickel-phosphorus alloy surface of the spherical cap. By setting the upper support 1, the lower support 2 and the ball crown 3, and connecting the plane friction pair and the curved friction pair between the ball crown 3 and the upper support 1 and the lower support 2, a complete and stable support structure system is constructed. The various components cooperate with each other, and can effectively transfer and disperse the loads borne, ensuring the stability of the overall structure of the support under different working conditions, and laying a good foundation for its application in various engineering structures (such as bridges, etc.) to bear vertical and horizontal forces. An elliptical slide groove 8 is provided at the bottom of the upper support 1, and the upper part of the elliptical plane slide 4 is embedded and fixed in the slide groove 8. This fixing method makes the connection between the elliptical plane slide 4 and the upper support 1 more firm and reliable. When the support is subjected to force and displacement occurs, it can effectively avoid the elliptical plane slide 4 from loosening, shifting and other problems, ensuring that the plane friction pair can stably perform its function, thereby ensuring the normal working state of the entire support structure. The elliptical plane slide plate 4 can move in the circular plane 5 along its major axis or minor axis, and the circular plane 5 is arranged concentrically with the elliptical plane slide plate 4. This unique design allows the bearing to flexibly adapt to the displacement requirements in different directions. Whether it is due to temperature changes, structural deformation or external loads, the bearing can effectively resolve the vertical, horizontal and other multi-directional displacement changes through the reasonable movement of the elliptical plane slide plate 4 in the circular plane 5, ensuring that the relative position changes between the upper structure (such as the bridge beam) and the lower structure (such as the bridge pier) connected to the bearing can be within a reasonable range, maintaining the integrity and normal use function of the entire structural system. The outer surface of the ball crown 3 is plated with nickel-phosphorus alloy, and the flat friction pair and the curved friction pair respectively use corresponding nickel-phosphorus alloy matching surfaces. This design makes full use of the good performance characteristics of nickel-phosphorus alloy. Nickel-phosphorus alloy has excellent wear resistance, which can effectively reduce the wear of the flat friction pair and the curved friction pair during long-term relative motion, extend their service life, and reduce the maintenance costs such as the decline in bearing performance and the need for frequent replacement of parts due to excessive wear of the friction pair.At the same time, its good corrosion resistance can resist the erosion of water vapor, chemical substances and other factors in the external environment on the key friction parts of the bearing, ensuring that the friction pair can still maintain a low friction coefficient in complex use environments, making the bearing smoother when it is displaced by force, further improving the working performance and reliability of the bearing. The synergistic effect of the plane friction pair and the curved friction pair and the above-mentioned structural design features enable the spherical bearing to not only meet the vertical and horizontal bearing capacity requirements, but also adapt well to the requirements of displacement and angle. It has good working performance in different engineering scenarios and complex stress conditions, providing a high-quality solution for various large structures that require reliable bearing support (especially projects such as bridges that have high requirements for structural safety and displacement adaptability), which helps to ensure the long-term safe and stable operation of engineering structures.

[0032] Embodiment 1

[0033] On the basis of some of the above embodiments, the bottom of the upper support 1 is provided with limited stoppers 6 on both sides along the short axis direction of the elliptical plane slide plate 4. The top of the limited stopper 6 is fixedly connected to the bottom of the upper support 1 and is an integral structure with the upper support 1. The bottom of the limited stopper 6 extends toward the lower support 2; when the bridge is displaced longitudinally (along the bridge direction), the limited stopper 6 can be used as a limit. The limited stopper 6 is provided on both sides along the short axis direction of the elliptical plane slide plate 4 at the bottom of the upper support 1, which can accurately and effectively limit the displacement of the support in the longitudinal direction. It prevents the longitudinal displacement of the support from exceeding the reasonable limit value due to external loads, structural deformation and other factors under various complex working conditions, ensures that the support is always in a normal and stable working state, maintains the rationality of the relative position relationship of each component in the entire structural system, and avoids safety hazards such as structural connection failure caused by excessive displacement. The limited stopper 6 is an integral structure with the upper support 1. This integrated design makes the connection strength between the limited stopper 6 and the upper support 1 higher and the integrity better. When subjected to external forces, they can work together more stably and transmit and disperse the force more reasonably, thereby further enhancing the stability of the entire support and the bridge structure it supports, allowing the entire structural system to remain stable and reliable when facing complex and changeable loads and displacements, reducing the risk of local structural damage and overall collapse.

[0034] Embodiment 2

[0035] On the basis of some of the above embodiments or embodiment 1, a sealing ring 7 is fixed on the circumferential surface of the upper part of the spherical crown 3 located above the lower support 2, and the top of the sealing ring 7 contacts the bottom surface of the upper support 1, and the bottom of the sealing ring 7 contacts the top surface of the lower support 2. The top of the sealing ring 7 extends toward the inner side of the top plane of the spherical crown 3, and the bottom of the sealing ring 7 extends toward the outer side of the top surface of the lower support 2. The middle part of the sealing ring 7 is an annular limiting structure that cooperates with the top circumferential surface of the spherical crown 3. The top of the sealing ring 7 contacts the bottom surface of the upper support 1, and the bottom contacts the top surface of the lower support 2, forming a relatively closed protective barrier that can effectively prevent dust, water vapor, and debris from entering the support. For key components such as the plane friction pair and the curved friction pair inside the support, wear, corrosion, and other damages caused by the intrusion of impurities are avoided, which helps to maintain these components in good working condition, extend their service life, and ensure the long-term stability of the overall performance of the support. The middle part of the sealing ring 7 is an annular limiting structure that cooperates with the circumferential surface of the top of the spherical crown 3. It can play a certain limiting role on the spherical crown 3, limit the unnecessary displacement or shaking of the spherical crown 3 in the horizontal direction, etc., so that the spherical crown 3 can maintain a relatively stable position inside the support, thereby ensuring that the cooperation between the various components of the entire support structure is more accurate and reliable, and improving the structural stability of the support when it bears various loads and displacements, corners, etc. Because the sealing ring 7 can effectively prevent external water vapor from entering the support, especially in some humid environments or areas easily affected by rain and water accumulation, it can prevent water vapor from accumulating inside the support, avoid rust and corrosion of metal parts due to humid environments, and damage to the lubrication performance of the friction pair surface, etc., ensure that the support can normally perform its load-bearing, displacement and other functions under different environmental conditions, and improve the adaptability of the support to complex environments. The sealing ring 7 is in close contact with the upper support 1, the lower support 2 and the spherical crown 3, and these components are further "connected" together, so that the integrity of the entire support structure is enhanced. When subjected to various loads such as vertical and horizontal loads, the various components can work together better to transmit and disperse the force evenly and reasonably, which helps to maintain the integrity of the overall structure of the support and ensure that it can reliably serve the supported engineering structure (such as bridges, etc.).

[0036] Embodiment 3

[0037] On the basis of the spherical bearing with equal displacement elliptical slide friction pair designed in some of the above embodiments or embodiment 1 or embodiment 2, a spherical bearing installation structure is provided, including a bridge 9, a pier 10 and the above spherical bearing with equal displacement elliptical slide friction pair, the upper bearing 1 is fixed to the bottom of the bridge 9, the lower bearing 2 is fixed to the top of the pier 10, and the limit stopper 6 is located on both sides of the bridge 9 along the bridge direction. The upper bearing 1 is fixed to the bottom of the bridge 9, and the lower bearing 2 is fixed to the top of the pier 10. This installation method constructs a clear and reasonable load transfer path. Various vertical loads from vehicles, pedestrians, etc., as well as horizontal loads such as wind loads and earthquakes borne by the bridge 9 can be smoothly transferred to the pier 10 through the spherical bearing, realizing the effective transfer of force from the upper structure to the lower structure, ensuring the stability of the entire bridge structure system under stress, and avoiding stress concentration and damage in the local structure due to poor load transfer. The limit blocks 6 are located on both sides of the bridge 9 in the direction of the bridge. In the daily use of the bridge, the possible displacement of the bridge in the direction of the bridge can be effectively limited to prevent excessive displacement in the direction of the bridge caused by temperature changes, vehicle braking and other factors, ensuring that the bridge always remains in a reasonable position range and maintains the normal state of the structure. At the same time, when encountering extreme situations such as earthquakes and strong winds, the limit blocks 6 can play a key role in preventing the bridge 9 from shaking or sliding too much in the direction of the bridge, greatly improving the safety of the bridge 9 under special working conditions, and protecting the safety of the entire bridge and surrounding traffic facilities and personnel. The spherical bearing itself has an equal displacement elliptical slide friction pair, which can adapt to the displacement and rotation requirements of the bridge in different directions such as vertical and horizontal directions due to various working conditions. In the installation structure, the reasonable connection between the bearing and the bridge 9 and the pier 10 enables the bearing to coordinate with the bridge 9 and the pier 10 to make corresponding position adjustments when the bridge 9 changes in displacement, ensuring that the entire structural system remains intact and coordinated during the displacement process, and does not generate excessive internal forces due to limited displacement, which helps to extend the service life of the structure and ensure the long-term reliable operation of the bridge. It can be applied to bridge projects of various types and sizes. Whether it is a small pedestrian bridge or a large highway or railway bridge, as long as it meets the corresponding load, displacement and other requirements, the spherical bearing and its installation structure can be used, providing a standardized and reliable solution for the construction and maintenance of bridge projects, facilitating the implementation of the project and subsequent management and maintenance operations.

[0038] In summary, the present invention provides a spherical bearing that does not require welding of a spherical surface and a flat stainless steel plate, can effectively reduce the longitudinal dimension of the spherical bearing, has a limit stopper 6, and prevents the longitudinal displacement of the spherical bearing from exceeding a limited value. While meeting the vertical and horizontal bearing capacity, displacement and rotation angle requirements of the spherical bearing, the installation dimensions of the spherical bearing are not changed.

[0039] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solution of the present invention is limited only by the scope of the claims. In the case of using "including", "having" and "comprising" described in this specification, there may also be another part or other parts, and the terms used may generally be singular but may also represent plural forms. Finally, it should be pointed out that the above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there may be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall be deemed to belong to the protection scope of the present invention.

Claims

1. A spherical bearing with an equal displacement elliptical slide friction pair, comprising an upper bearing (1), a lower bearing (2) and a spherical cap (3) arranged in the top of the lower bearing (2), a plane friction pair being connected between the top of the spherical cap (3) and the bottom of the upper bearing (1), and a curved friction pair being connected between the spherical cap (3) and the lower bearing (2), characterized in that: The planar friction pair comprises an elliptical plane slide plate (4) fixed to the bottom of the upper support (1) and a circular plane (5) at the top of the spherical cap (3); the elliptical plane slide plate (4) can move on the circular plane (5) along its major axis or minor axis direction; and limited stoppers (6) are provided on both sides of the bottom of the upper support (1) along the minor axis direction of the elliptical plane slide plate (4).

2. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 1, characterized in that: The top surface of the spherical cap (3) is located above the top surface of the lower support (2), and a sealing ring (7) is fixed to the circumferential surface of the spherical cap (3) located above the lower support (2), the top of the sealing ring (7) contacts the bottom surface of the upper support (1), and the bottom of the sealing ring (7) contacts the top surface of the lower support (2).

3. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 2, characterized in that: The top of the sealing ring (7) extends toward the inner side of the top plane of the spherical crown (3), the bottom of the sealing ring (7) extends toward the outer side of the top surface of the lower support (2), and the middle part of the sealing ring (7) is an annular limiting structure that cooperates with the top circumferential surface of the spherical crown (3).

4. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 1, characterized in that: An elliptical slide plate groove (8) is provided at the bottom of the upper support (1), and the upper part of the elliptical plane slide plate (4) is embedded and fixed in the slide plate groove (8).

5. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 1, characterized in that: The circular plane (5) is arranged concentrically with the elliptical plane slide plate (4).

6. The spherical bearing with equal displacement elliptical sliding plate friction pair as claimed in claim 1, characterized in that: The outer surface of the spherical crown (3) is plated with a nickel-phosphorus alloy, and the planar friction pair comprises a circular nickel-phosphorus alloy surface of the circular plane (5) and a bottom surface of the elliptical plane slide plate (4).

7. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 6, characterized in that: The curved surface friction pair comprises a spherical nickel-phosphorus alloy surface of a spherical cap (3) and a spherical matching surface located in the lower support (2) and matching with the spherical nickel-phosphorus alloy surface of the spherical cap.

8. The spherical bearing with an equal displacement elliptical sliding plate friction pair as claimed in claim 1, characterized in that: The top of the limit stopper (6) is fixedly connected to the bottom of the upper support (1) and is an integral structure with the upper support (1); the bottom of the limit stopper (6) extends toward the lower support (2); when the bridge undergoes longitudinal displacement, the limit stopper (6) can limit the extreme position of the longitudinal movement of the upper support (1).

9. A mounting structure of a spherical bearing with an equal displacement elliptical sliding plate friction pair, comprising a bridge (9) and a bridge pier (10), characterized in that: It also includes a spherical bearing with an equal displacement elliptical sliding plate friction pair as described in any one of claims 1 to 8, wherein the upper bearing (1) is fixed to the bottom of the bridge (9), and the lower bearing (2) is fixed to the top of the pier (10).

10. The installation structure of the spherical bearing with the equal displacement elliptical slide friction pair according to claim 9, characterized in that: The limit blocks (6) are located on both sides of the bridge (9) along the bridge direction.

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