A long-lasting wear-resistant, shock-absorbing and wind-resistant ball-type bearing

Abstract

The present invention relates to the technical field of bridge bearings, and aims to solve the problem that after the existing wind-resistant bearing is placed vertically, the silicone grease of the lubricating slide plate overflows and causes the slide plate to dry-grind and become laterally empty, and provides a long-lasting, wear-resistant, shock-absorbing and wind-resistant spherical bearing, comprising an upper bearing plate, a plane skateboard, a spherical crown lining plate, a spherical skateboard, an intermediate steel lining plate and a lower bearing plate arranged in sequence from left to right, the plane skateboard and the spherical crown lining plate are fixed as a whole, the plane skateboard and the upper bearing plate form a sliding pair, a sealing ring is provided around the plane skateboard, the plane skateboard adopts an ultra-high-performance polytetrafluoroethylene skateboard, the intermediate steel lining plate and the spherical skateboard are fixed as a whole, the spherical skateboard and the spherical crown lining plate form a rotating pair, the spherical crown lining plate and the intermediate steel lining plate are connected by a connecting piece, and the two can rotate, and a first elastic member in a compressed state is provided between the intermediate steel lining plate and the lower bearing plate.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge bearings, and in particular to a long-lasting, wear-resistant, shock-absorbing and wind-resistant ball-type bearing. Background Art

[0002] With the rapid development of bridge construction technology, there are more and more long-span bridges across rivers, across seas, and on the mainland. However, the larger the span of the bridge, the larger the area affected by the wind load, and the greater the damage caused by the wind load to the bridge, especially the fully floating system bridge. Therefore, improving the wind resistance of cable-stayed bridges and suspension bridges, especially the lateral wind resistance of the beam itself, is a very important problem. This urgently requires bridge engineers to select a bearing with a reasonable structural design and strong wind resistance to meet the actual needs of the bridge. Wind-resistant bearings are generally installed in pairs on both sides of the bridge, and are anchored to the tower and beam respectively. They can effectively limit the large-distance transverse swing of the beam caused by wind or seismic forces, and can also meet the needs of the longitudinal displacement, lateral displacement, vertical displacement and rotation angle of the beam. The wind-resistant bearings currently used in bridges mainly include wind-resistant basin-type rubber bearings, wind-resistant ball-type bearings, and speed-related wind-resistant bearings. The slide plates of ordinary bearings require silicone grease lubrication. Since the bearings are placed vertically, the silicone grease will quickly dry up under the action of gravity, causing the slide plates to work in a dry grinding state, increasing the friction coefficient, increasing the wear of the slide plates, and reducing the service life of the slide plates. In addition, due to the large average daily displacement of long-span bridges, the wear distance of slide plates of conventional thickness is short, which cannot meet the long-distance wear requirements of long-span bridges. Conventional wind-resistant bearings are not equipped with elastic structures. During the use of the bearings, as the temperature of the bridge changes, the sliding surface of the bearing plane may become detached. Dust and impurities can easily enter the sliding surface of the bearing, which will damage the sliding surface of the bearing, increase the friction coefficient of the bearing sliding surface, increase the wear of the bearing, reduce the service life of the slide plates, increase the internal force of the bridge structure, and affect the structural safety of the bridge. Summary of the Invention

[0003] The present invention aims to provide a long-lasting wear-resistant, shock-absorbing and wind-resistant ball-type bearing to solve the problem that the silicone grease lubricating the slide plate quickly dries up after the bearing is placed vertically, causing dry grinding and lateral delamination of the slide plate.

[0004] The present invention is achieved by adopting the following technical solutions:

[0005] A long-lasting, wear-resistant, shock-absorbing and wind-resistant spherical bearing comprises an upper bearing plate, a plane skateboard, a spherical crown lining plate, a spherical skateboard, an intermediate steel lining plate and a lower bearing plate, which are arranged in sequence from left to right. The plane skateboard is fixed as one piece with the spherical crown lining plate, and the plane skateboard and the upper bearing plate form a sliding pair. A sealing ring is provided around the plane skateboard. The plane skateboard adopts an ultra-high-performance polytetrafluoroethylene skateboard. The intermediate steel lining plate is fixed as one piece with the spherical skateboard, and the spherical skateboard and the spherical crown lining plate form a rotating pair. The spherical crown lining plate and the intermediate steel lining plate are connected by a connecting piece, and can rotate between the two. A first elastic member in a compressed state is provided between the intermediate steel lining plate and the lower bearing plate.

[0006] The material of the flat slide of the present invention is ultra-high performance polytetrafluoroethylene, and no silicone grease is needed, so the problem of dry grinding of the slide will not be caused. The thickness of the flat slide can also be increased (the thickness of the flat slide can reach 20 to 30 mm) to increase the wear distance.

[0007] Since the first elastic member is in a compressed state, the first elastic member has a tendency to recover its deformation, and has an elastic effect on the middle steel liner and the lower support plate at both ends. The elastic force lifts the middle steel liner and always provides a certain tightening force, so that the flat slide plate is always in close contact with the upper support plate, and at the same time provides a certain lateral stiffness, which buffers the impact load of the horizontal bridge and reduces shock energy.

[0008] The present invention arranges a first elastic member in a compressed state between the middle steel liner and the lower support plate, and utilizes the elastic force of the first elastic member to press the middle steel liner tightly, so that the planar slide plate and the upper support plate are always in close contact, avoiding the sliding surface of the support from being disengaged, that is, avoiding the horizontal separation between the planar slide plate and the upper support plate, and avoiding dust and impurities from entering the sliding surface of the support, thereby ensuring the structural safety of the bridge.

[0009] As the preferred technical solution:

[0010] A first groove is provided on the middle steel liner, the first elastic member is located in the first groove, one end of the first elastic member is connected to the bottom of the first groove, and the other end of the first elastic member is connected to the lower support plate.

[0011] By arranging a first groove on the middle steel liner to accommodate the first elastic member, and connecting the two ends of the first elastic member to the middle steel liner and the lower support plate respectively, the elastic effect of the first elastic member is fully utilized to support the middle steel liner, and the flat slide plate is pressed against the upper support plate, so that the entire structure is compact and inseparable, and the lateral stiffness is improved.

[0012] As the preferred technical solution:

[0013] A cavity is provided on the lower support plate, and the middle steel lining plate partially extends into the cavity. A flange is provided on the middle steel lining plate, and a limit block is provided on the lower support plate, and the limit block abuts against the flange.

[0014] The middle steel liner is limited and retained in the cavity of the lower support plate by the contact between the limit block and the flange.

[0015] As the preferred technical solution:

[0016] The limit stopper is connected to the lower support plate via a first bolt, and the first bolt can adjust the distance between the limit stopper and the lower support plate, and the distance between the middle steel liner and the lower support plate.

[0017] The limit stopper is connected to the lower support plate via a first bolt. After the first bolt passes through the limit stopper, the distance between the limit stopper and the lower support plate can be adjusted accordingly by changing the length of the first bolt screwed into the lower support plate. When the distance between the two is changed, the position of the flange will also change accordingly, that is, the first elastic body will be in a different compression state, corresponding to different elastic forces. Therefore, adjusting the first bolt can adjust the preload of the first elastic body. The change in the position of the flange means that the position of the intermediate steel liner is changed, and therefore the distance between the intermediate steel liner and the lower support plate will also change accordingly.

[0018] As the preferred technical solution:

[0019] The first elastic member is a disc spring or a cylindrical helical compression spring.

[0020] The first elastic member is pressurized to lift the middle steel liner and push the planar slide plate to contact the upper support plate.

[0021] The displacement stroke of the first elastic member is determined by the degree of loosening of the first bolt between the limit stop block and the lower support plate, ensuring that the support is within a stable working range.

[0022] As the preferred technical solution:

[0023] The disc spring adopts a combination of multiple disc springs with positive or negative buckles to provide a certain vertical rigidity for the support.

[0024] As the preferred technical solution:

[0025] The sealing ring is located between the spherical cap lining plate and the upper support plate, and the sealing ring is used to seal the planar slide plate;

[0026] A second groove is provided on the spherical cap lining, and a second elastic member in a compressed state is provided in the second groove. One end of the second elastic member is connected to the bottom of the second groove, and the other end is connected to the sealing ring, and the sealing ring is pressed against the upper support plate.

[0027] The sealing ring is always pressed against the upper support plate by the second elastic member, so that the planar slide always remains sealed. Even if the planar slide is continuously worn, the first elastic member always presses the planar slide against the upper support plate, and the second elastic member always presses the sealing ring against the upper support plate. The sealing ring fits tightly against the upper support plate. Therefore, the circumference of the planar slide is always well sealed, thereby ensuring the sealing of the support.

[0028] As the preferred technical solution:

[0029] The width of the sealing ring matches the width of the second groove, and the sealing ring is partially located in the second groove.

[0030] The sealing ring has a certain margin, which can better seal the planar slide.

[0031] As the preferred technical solution:

[0032] The second elastic member is a cylindrical helical compression spring.

[0033] As the preferred technical solution:

[0034] The second groove is an annular groove, and its cross section is circular or square.

[0035] The annular groove refers to a closed annular groove connected end to end, and its overall shape may not be circular, but may be square, etc., and its cross-section may be circular or square.

[0036] As the preferred technical solution:

[0037] A plurality of second elastic members are disposed in the second groove, and all of the second elastic members are evenly spaced and distributed in the second groove.

[0038] The sealing ring is supported by a plurality of the second elastic bodies and pressed tightly against the upper support plate.

[0039] As the preferred technical solution:

[0040] The connecting piece is a tensile bolt, and the spherical crown lining plate and the intermediate steel lining plate are connected by the tensile bolt. A through hole is provided on the intermediate steel lining plate, and a threaded hole is provided on the spherical crown lining plate. The tensile bolt passes through the through hole and is connected with the threaded hole.

[0041] The spherical crown lining plate is connected to the intermediate steel lining plate by the tensile bolts, but it is not a rigid connection. Since a through hole is provided on the intermediate steel lining plate, and the tensile bolts pass through the through hole and are only connected with the threaded hole, rotation between the spherical crown lining plate and the intermediate steel lining plate can still be achieved, thereby ensuring the normal operation of the rotating pair formed by the spherical slide plate and the spherical crown lining plate.

[0042] As the preferred technical solution:

[0043] The diameter of the through hole is larger than the diameter of the tensile bolt rod, and the diameter of the through hole is smaller than the diameter of the tensile bolt head. The tensile bolt rod can pass through the through hole smoothly. After passing through the through hole, the tensile bolt head is limited to the outside of the middle steel liner and cannot enter the through hole.

[0044] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0045] 1. The material of the flat slide of the present invention is ultra-high performance polytetrafluoroethylene, and no silicone grease is needed, so the problem of dry grinding of the slide will not be caused. The thickness of the flat slide can also be increased (the thickness of the flat slide can reach 20 to 30 mm) to increase the wear distance.

[0046] 2. Since the first elastic member is in a compressed state, it has a tendency to recover its deformation and has an elastic effect on the middle steel liner and the lower support plate at both ends. The elastic force lifts the middle steel liner and always provides a certain tightening force, so that the flat slide plate is always in close contact with the upper support plate, preventing dust and impurities from entering the sliding surface of the support, ensuring the structural safety of the bridge, and at the same time providing a certain lateral stiffness to buffer the horizontal bridge impact load and reduce shock energy.

[0047] 3. The distance between the limit stop and the lower support plate is adjusted by the first bolt, thereby adjusting the compression amount of the first elastic body to ensure that the support is within a stable working range.

[0048] 4. The spherical crown lining plate and the middle steel lining plate are connected by tension bolts, so that the middle steel lining plate and the spherical crown lining plate are integrated, while maintaining rotation and preventing parts from falling.

[0049] 5. The second elastic member always presses the sealing ring against the upper support plate, ensuring that the sealing ring and the upper support plate are in close contact, thereby ensuring the sealing performance of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1This is a schematic structural diagram of the long-lasting, wear-resistant, shock-absorbing, and wind-resistant ball-type bearing described in the present invention.

[0051] Icon: 1-upper support plate, 2-sealing ring, 3-flat slide plate, 4-spherical crown lining plate, 5-tension bolt, 6-spherical slide plate, 7-middle steel lining plate, 8-limit block, 9-first elastic part, 10-lower support plate, 11-first bolt, 12-second elastic part, 13-tower, 14-beam body, 15-flange. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0053] Example 1

[0054] See also Figure 1 This embodiment proposes a long-lasting, wear-resistant, shock-absorbing and wind-resistant ball-type bearing, which includes an upper bearing plate 1, a flat slide plate 3, a spherical crown lining plate 4, a spherical slide plate 6, an intermediate steel lining plate 7 and a lower bearing plate 10, which are arranged from left to right.

[0055] Wherein: the upper support plate 1 includes a top plate and a flat stainless steel plate, the two being welded together, and the upper support plate 1 is used to connect to the cable tower 13;

[0056] The flat slide plate 3 is fixed to the spherical cap lining plate 4 as a whole, and the flat slide plate 3 forms a sliding pair with the upper support plate 1;

[0057] The intermediate steel lining plate 7 is fixed to the spherical slide plate 6 as a whole. The spherical slide plate 6 and the spherical crown lining plate 4 form a revolute pair. The sliding pair and the revolute pair move in coordination, thereby realizing the bearing, rotation and displacement functions of the support.

[0058] A sealing ring 2 is provided on the circumference of the planar slide 3 , and the sealing ring 2 is connected to the spherical cap lining 4 via a second elastic member 12 .

[0059] The spherical crown lining plate 4 is connected to the middle steel lining plate 7 by tension bolts 5, and the two can rotate. A first elastic member 9 in a compressed state is provided between the middle steel lining plate 7 and the lower support plate 10, and the lower support plate 10 is used to connect to the beam body 14.

[0060] Specifically, the flat slide plate 3 adopts an ultra-high performance polytetrafluoroethylene slide plate, which does not need to be coated with silicone grease, and can prevent the silicone grease from seeping out and drying up under the action of gravity, thereby ensuring that the slide plate is always in good working condition and will not cause the problem of dry grinding of the slide plate.

[0061] The present invention increases the thickness of the planar slide plate 3 (the thickness of the planar slide plate 3 can reach 20 to 30 mm) to increase the wear distance, thereby meeting the long-distance wear requirements of large-span bridges and increasing service life.

[0062] The middle steel liner 7 is provided with a first groove, and the first elastic member 9 is located in the first groove. One end of the first elastic member 9 is fixedly connected to the bottom of the first groove, and the other end of the first elastic member 9 is fixedly connected to the lower support plate 10. The first groove is provided on the middle steel liner 7 to accommodate the first elastic member 9.

[0063] Since the first elastic member 9 is in a compressed state, the first elastic member 9 has a tendency to recover its deformation, and has an elastic effect on the middle steel lining plate 7 and the lower support plate 10 at both ends. The elastic force lifts the middle steel lining plate 7 and increases the vertical stiffness of the support, so that the flat slide plate 3 is always in close contact with the upper support plate 1, preventing dust and impurities from entering the sliding surface of the support, ensuring the structural safety of the bridge, and at the same time providing a certain lateral stiffness to buffer the horizontal bridge impact load and reduce shock energy consumption.

[0064] The lower support plate 10 is provided with a cavity, into which the intermediate steel liner 7 partially extends. The intermediate steel liner 7 is provided with a flange 15, and the lower support plate 10 is provided with a stopper 8, which abuts against the flange 15. The portion of the intermediate steel liner 7 provided with the flange 15 is located within the cavity. The stopper 8 is provided at the edge of the cavity opening of the lower support plate 10, abutting against the flange 15 on the intermediate steel liner 7, thereby limiting the position of the intermediate steel liner 7 and preventing it from slipping out of the lower support plate 10.

[0065] The limit stop 8 is connected to the lower support plate 10 by a first bolt 11, and the first bolt 11 can adjust the distance between the limit stop 8 and the lower support plate 10. After the first bolt 11 passes through the limit stop 8, the distance between the limit stop 8 and the lower support plate 10 can be adjusted accordingly by changing the length of the first bolt 11 screwed into the lower support plate 10. After the distance between the two changes, the position of the flange 15 will also change under the elastic force of the first elastic member 9, that is, the flange 15 will always remain in contact with the limit stop 8. Accordingly, the first elastic body 9 will be in different compression states, corresponding to different elastic forces. Therefore, by adjusting the first bolt 11, the preload of the first elastic body 9 can be adjusted to provide the required preload when the support leaves the factory.

[0066] Preferably, the first elastic member 9 is a disc spring, and the disc spring adopts a combination of multiple disc springs with positive or negative buckles to provide a certain vertical stiffness for the support.

[0067] When compressed, the disc spring can lift the intermediate steel liner 7 and push the flat slide plate 3 until it contacts the upper support plate 1. The displacement of the disc spring is determined by the degree of loosening of the first bolt 11 between the limit stop 8 and the lower support plate 10, ensuring that the support is within a stable operating range.

[0068] The sealing ring 2 is located between the spherical crown lining plate 4 and the upper support plate 1, and the sealing ring 2 is used to seal the flat skateboard 3; the spherical crown lining plate 4 is provided with a second groove, and the second groove is an annular groove, and its cross-section is circular or square. The annular groove refers to a closed annular groove connected end to end, and its overall shape may not be circular, but may be square, etc., and its cross-section may be circular or square.

[0069] A plurality of compressed second elastic members 12 are disposed within the second groove. One end of the second elastic member 12 is connected to the bottom of the second groove, and the other end is connected to the sealing ring 2. The sealing ring 2 is pressed against the upper support plate 1 via the second elastic members 12. All second elastic members 12 are evenly spaced within the second groove to uniformly support the sealing ring 2.

[0070] The second elastic member 12 always presses the sealing ring 2 against the upper support plate 1, so that the planar slide 3 always remains sealed. Even if the planar slide 3 is continuously worn, the first elastic member 9 always presses the planar slide 3 against the upper support plate 1, and the second elastic member 12 always presses the sealing ring 2 against the upper support plate 1. The sealing ring 2 fits tightly against the upper support plate 1. Therefore, the circumference of the planar slide 3 is always well sealed, thereby ensuring the sealing of the support.

[0071] Preferably, the width of the sealing ring 2 matches the width of the second groove, the sealing ring 2 is partially located in the second groove, and the sealing ring 2 has a certain margin, which can better seal the flat slide 3. The sealing ring 2 is annular or square.

[0072] Preferably, the second elastic member 12 is a spring, but is not limited to a spring, and any member with elastic expansion and contraction function can be used. Similarly, the first elastic member 9 only needs to have elastic expansion and contraction function, and is not limited to a disc spring.

[0073] The spherical cap liner 4 and the intermediate steel liner 7 are connected via the tensile bolts 5. A through-hole is defined in the intermediate steel liner 7, and a threaded hole is defined in the spherical cap liner 4. The tensile bolts 5 pass through the through-holes and engage with the threaded holes. The diameter of the through-holes is larger than the diameter of the shank of the tensile bolt 5, but smaller than the diameter of the head of the tensile bolt 5. The shank of the tensile bolt 5 can pass through the through-holes smoothly. After passing through the through-holes, the head of the tensile bolt 5 is confined to the outside of the intermediate steel liner 7 and cannot enter the through-holes.

[0074] The spherical cap liner 4 is connected to the intermediate steel liner 7 by the tensile bolts 5, but the connection is not rigid. Since the intermediate steel liner 7 has a through hole and the tensile bolts 5 pass through the through hole and are only connected with the threaded hole, rotation between the spherical cap liner 4 and the intermediate steel liner 7 can still be achieved, ensuring the normal operation of the revolving pair formed by the spherical slide 6 and the spherical cap liner 4. The spherical cap liner 4 and the intermediate steel liner 7 are connected by the tensile bolts 5, so that the intermediate steel liner 7 and the spherical cap liner 4 are integrated, while maintaining rotation and preventing parts from falling.

[0075] Example 2

[0076] The difference between this embodiment and embodiment 1 is that the disc spring can be replaced by a cylindrical helical compression spring.

[0077] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A long-lasting wear-resistant, shock-absorbing and wind-resistant ball-type bearing, characterized by: The invention comprises an upper support plate (1), a plane slide plate (3), a spherical crown lining plate (4), a spherical surface slide plate (6), an intermediate steel lining plate (7) and a lower support plate (10) which are arranged in sequence from left to right. The plane slide plate (3) and the spherical crown lining plate (4) are fixed as a whole. The plane slide plate (3) and the upper support plate (1) form a sliding pair. A sealing ring (2) is provided around the plane slide plate (3). The plane slide plate (3) adopts an ultra-high performance polytetrafluoroethylene slide plate. The intermediate steel lining plate (7) and the spherical surface slide plate (6) are fixed as a whole. The spherical surface slide plate (6) and the spherical crown lining plate (4) form a rotation pair. The spherical crown lining plate (4) and the intermediate steel lining plate (7) are connected by a connecting piece and can rotate therebetween. A first elastic member (9) in a compressed state is provided between the intermediate steel lining plate (7) and the lower support plate (10); The middle steel lining plate (7) is provided with a first groove, the first elastic member (9) is located in the first groove, one end of the first elastic member (9) is connected to the bottom of the first groove, and the other end of the first elastic member (9) is connected to the lower support plate (10); The lower support plate (10) is provided with a cavity, the middle steel lining plate (7) partially extends into the cavity, the middle steel lining plate (7) is provided with a flange (15), the lower support plate (10) is provided with a limit block (8), and the limit block (8) abuts against the flange (15); The limit stopper (8) is connected to the lower support plate (10) via a first bolt (11), and the first bolt (11) is capable of adjusting the distance between the limit stopper (8) and the lower support plate (10), and the distance between the intermediate steel lining plate (7) and the lower support plate (10); The sealing ring (2) is located between the spherical cap lining plate (4) and the upper support plate (1), and the sealing ring (2) is used to seal the planar slide plate (3); A second groove is provided on the spherical cap lining plate (4), a second elastic member (12) in a compressed state is provided in the second groove, one end of the second elastic member (12) is connected to the bottom of the second groove, and the other end is connected to the sealing ring (2), and the sealing ring (2) is pressed against the upper support plate (1); The second groove is an annular groove, and its cross section is circular or square; A plurality of second elastic members (12) are provided in the second groove, and all the second elastic members (12) are evenly spaced and distributed in the second groove; The connecting piece is a tensile bolt (5), and the spherical cap lining plate (4) and the intermediate steel lining plate (7) are connected via the tensile bolt (5). A through hole is provided on the intermediate steel lining plate (7), and a threaded hole is provided on the spherical cap lining plate (4). The tensile bolt (5) passes through the through hole and is connected in cooperation with the threaded hole.

2. The long-lasting wear-resistant, shock-absorbing and wind-resistant spherical bearing according to claim 1 is characterized by: The first elastic member (9) is a disc spring or a cylindrical helical compression spring.

3. The long-lasting wear-resistant, shock-absorbing and wind-resistant spherical bearing according to claim 1 is characterized by: The width of the sealing ring (2) matches the width of the second groove, and the sealing ring (2) is partially located in the second groove.

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