Self-locking hydraulic elastic damper

Abstract

The application discloses a self-locking hydraulic elastic damper, which comprises a locking part, a left ear part, an outer sleeve, a damping part, an elastic part, a tail cylinder and a right ear part; the left ear part is hinged to the locking part; the damping part comprises a cylinder body and a piston rod which is inserted into the cylinder body; the outer sleeve is sleeved on the damping part, and the outer sleeve is coaxially arranged with the piston rod; the elastic part is connected with the cylinder body, and the piston rod is movably inserted into the elastic part; the tail cylinder is connected with the elastic part; and the right ear part is connected with the auxiliary cylinder body; the self-locking hydraulic elastic damper can avoid excessive wear of the damping part under non-seismic conditions, prolong the service life of the damper, and can be widely applied to various anti-seismic structure fields under the premise of guaranteeing the original shock insulation function of the viscous damper.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge engineering, in particular to a self-locking hydraulic elastic damper. BACKGROUND

[0002] The viscous damper is a connecting device composed of a viscous liquid force medium based on silicone injected into a dedicated oil cylinder, a gap between the oil cylinder wall and the piston, or a flow guide hole arranged on the piston. When the structure is impacted by external loads (such as wind and earthquakes), the piston rod reciprocates in the hydraulic cylinder, and the damping medium rapidly flows in the two separated cavities of the hydraulic cylinder. Intense friction occurs between the molecules of the damping medium, the medium and the piston rod, and the medium and the hydraulic cylinder body. When the medium passes through the piston hole, a large throttling damping is generated. The resultant force of these actions becomes the damping force. The mechanical energy transmitted to the piston rod is converted into heat energy (emitted), thereby absorbing energy and reducing displacement.

[0003] At present, the viscous damper has excessive working load outside the earthquake working condition in actual use, which causes wear of the damper in advance, reduces the service life of the damper, and even causes serious oil leakage problem, resulting in great safety hazard.

[0004] Therefore, it is necessary to provide a novel self-locking hydraulic elastic damper to overcome the above defects. SUMMARY

[0005] The present application aims to provide a self-locking hydraulic elastic damper which avoids unnecessary wear caused by excessive work in non-seismic conditions and prolongs the service life of the damper while ensuring the original seismic isolation function of the viscous damper.

[0006] In order to achieve the above-mentioned purpose, the present application provides a self-locking hydraulic elastic damper, which comprises a locking part, a left ear part, an outer sleeve, a damping part, an elastic assembly, a tail cylinder and a right ear part. The left ear part is hinged to the locking part. The damping part comprises a cylinder body and a piston rod inserted into the cylinder body. The outer sleeve is sleeved on the damping part, and the outer sleeve and the piston rod are coaxially arranged. The elastic assembly is connected with the cylinder body, and the piston rod is movably inserted into the elastic assembly. The tail cylinder is connected with the elastic assembly. The right ear part is connected with the auxiliary cylinder body.

[0007] In a preferred embodiment, the locking part comprises an anchorage plate, a connecting plate, a cover plate and a limiting pin. Two slotted vertical plates are arranged on the top surface of the anchorage plate. The limiting pin is movably installed in the slot formed by the two slotted vertical plates,

[0008] The connecting plate is connected to the middle of the two vertical plates on the top of the anchorage plate and is hinged to the left ear part, and the side of the connecting plate is provided with a reverse U-shaped hole, and the openings at both ends of the reverse U-shaped hole are arranged downward.

[0009] In a preferred embodiment, the locking part further comprises a cover plate, which is fixedly connected with the outer sleeve, and the cover plate is provided with a notch corresponding to the slotted vertical plate.

[0010] In a preferred embodiment, the left ear part is hinged to the connecting plate of the locking part, and the left ear part is further connected with the piston rod.

[0011] In a preferred embodiment, the damping part further comprises a left end cover, a right end cover and a piston body; the cylinder body has an inner cavity, the piston rod is movably inserted into the inner cavity, the left end cover, the piston body and the right end cover are sequentially sleeved on the piston rod and accommodated in the inner cavity, so as to divide the inner cavity into a left chamber and a right chamber, and the left chamber and the right chamber are filled with damping medium.

[0012] In a preferred embodiment, the elastic assembly comprises a secondary cylinder body, a guide rod, a push tube, a left baffle, an elastic piece and a right baffle, the secondary cylinder body is sleeved on the piston rod and connected with the cylinder body, the guide rod is inserted on the outer sleeve and the right baffle, the guide rod can slide on the outer sleeve and the right baffle, the push tube is movably sleeved on the guide rod, the push tube and the guide rod can relatively slide, the left baffle is fixed on the outside of the secondary cylinder body and can slide in cooperation with the push tube, the right baffle is fixed on the outside of the secondary cylinder body and connected with the tail cylinder and can slide in cooperation with the guide rod, the elastic piece is sleeved on the guide rod, and the right ear part is connected with the secondary cylinder body.

[0013] In a preferred embodiment, the number of guide rods is multiple, and the multiple guide rods are distributed in a circumferential array around the secondary cylinder body; the number of elastic pieces is multiple, and the multiple elastic pieces are distributed in a circumferential array and correspondingly sleeved on the multiple guide rods.

[0014] In a preferred embodiment, the guide rod is further provided with a snap ring one and a snap ring two, the snap ring one is located at the left end of the guide rod and extends into the outer sleeve; the snap ring two is located near the right end of the guide rod.

[0015] In a preferred embodiment, the push tube is further provided with a snap ring three at the right end, and the elastic piece is arranged between the snap ring two and the snap ring three.

[0016] Compared with the prior art, the beneficial effects are that: 1) the self-locking hydraulic elastic damper divides damper work into two stages, in the non-seismic working condition, only the elastic component works, the damping part does not work, when the earthquake occurs, the elastic component stops working, and the damping part starts to dissipate energy; unnecessary structural loss of the damping part is reduced, the service life of the damper is prolonged, the state of the damper is ensured to be good during the earthquake, the reliability is improved, and the damper can be widely applied to various seismic structure fields;

[0017] 2) the elastic member has excellent elasticity, is easy to realize self-resetting, can meet the demand of large deformation structure, and the elastic member is always in the compression state whether the damper is in the tension state or the compression state, so that excellent self-resetting function is provided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0019] Figure 1 A perspective view of the self-locking hydraulic elastic damper provided by the present application is shown.

[0020] Figure 2 A sectional view of the self-locking hydraulic elastic damper shown in the figure is shown. Figure 1

[0021] Figure 3 A sectional view of the self-locking hydraulic elastic damper in another state is shown. Figure 1

[0022] A sectional view of the self-locking hydraulic elastic damper in still another state is shown. Figure 4 Figure 1 A sectional view of the self-locking hydraulic elastic damper in still another state is shown.

[0023] Figure 5 Figure 1 A sectional view of the self-locking hydraulic elastic damper in still another state is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and beneficial technical effects of the present application more clear and obvious, the present application will be further described in detail in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described in the specification are only for the purpose of explaining the present application, and are not intended to limit the present application.

[0025] ​​​It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like refer to the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] It should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the terms "first", "second", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple", "several" means two or more, unless otherwise explicitly specified.

[0028] Please refer to Figures 1 to 5 The present application provides a self-locking hydraulic elastic damper, comprising a locking part 1, a left ear part 2, an outer sleeve 3, a damping part 4, an elastic assembly 5, a tail cylinder 6 and a right ear part 7.

[0029] The damping part 4 comprises a cylinder body 42 and a piston rod 44 inserted in the cylinder body 42, the outer sleeve 3 is sleeved on the damping part 4, the elastic assembly 5 is fixedly connected with the cylinder body 42, and the piston rod 44 is movably inserted in the elastic assembly 5, the tail cylinder 6 is fixedly connected with the elastic assembly 5, the right ear part 7 is fixedly connected with the auxiliary cylinder 51, and the right ear part 7 is used for connecting with the upper structure (such as bridge).

[0030] The locking part 1 comprises an anchorage plate 11, a connecting plate 12, a cover plate 13 and a limiting pin 14; the anchorage plate 11 is anchored on the lower structure (such as bridge pier), and the top surface of the anchorage plate 11 is provided with two slotted vertical plates 10, the limiting pin 14 is movably installed in the slot formed by the two slotted vertical plates,

[0031] The connecting plate 12 is connected to the middle of the two vertical plates 10 on the top of the anchorage plate 11 and is hinged to the left ear part 2, the side of the connecting plate 12 is provided with a reverse U-shaped hole for the sliding of the limiting pin 14, the openings at both ends of the reverse U-shaped hole are arranged downward to facilitate the falling of the limiting pin 14 after sliding to both ends of the reverse U-shaped hole.

[0032] The locking part further comprises a cover plate 13, the cover plate 13 is fixedly connected with the outer sleeve 3, the cover plate 13 is not connected with the two vertical plates 10, and the cover plate 13 is provided with a slot corresponding to the slotted vertical plate 10.

[0033] The left ear part 2 is hinged to the connecting plate 12 of the locking part 1, and the left ear part 2 is also fixedly connected with the piston rod 44, and the left ear part 2 is not connected with the outer sleeve 3.

[0034] The damping part 4 further comprises a left end cover 41, a right end cover 43 and a piston body 441; the cylinder body 42 has an inner cavity, the piston rod 44 is movably inserted into the inner cavity, the left end cover 41, the piston body 441 and the right end cover 43 are sequentially sleeved on the piston rod 44 from left to right and are accommodated in the inner cavity, so as to divide the inner cavity into a left chamber 45 and a right chamber 46, and the left chamber 45 and the right chamber 46 are filled with damping medium 47.

[0035] There is a certain gap between the piston body 441 and the inner wall of the cylinder body 42 (a certain number of flow guide holes can be arranged on the piston body 441).

[0036] The elastic assembly 5 comprises a secondary cylinder body 51, a guide rod 52, a push tube 53, a left baffle 54, an elastic member (spring) 55 and a right baffle 56, the secondary cylinder body 51 is sleeved on the piston rod 44 and is fixedly connected with the cylinder body 42, the guide rod 52 is inserted on the outer sleeve 3 and the right baffle 56, the guide rod 52 can slide on the outer sleeve 3 and the right baffle 56, the push tube 53 is movably sleeved on the guide rod 52, the push tube 53 and the guide rod 52 can relatively slide, the left baffle 54 is fixed on the outside of the secondary cylinder body 51 and can slide in cooperation with the push tube 53, the right baffle 56 is fixed on the outside of the secondary cylinder body 51 and is fixedly connected with the tail cylinder 6, the right baffle 56 can slide in cooperation with the guide rod 52, the elastic member 55 is sleeved on the guide rod 52, and the right ear part 7 is fixedly connected with the secondary cylinder body 51.

[0037] The guide rod 52 is further provided with a snap ring one 521 and a snap ring two 522, the snap ring one 521 is located at the left end of the guide rod 52 and extends into the outer sleeve 3 to limit the guide rod 52 from being separated from the outer sleeve 3 when sliding, and the snap ring two 522 is located close to the right end of the guide rod 52 to limit the relative displacement distance between the guide rod 52 and the right baffle 56.

[0038] The push tube 53 right end also has a snap ring three 531, the elastic element 55 is arranged between the snap ring two 522 and the snap ring three 531, and the snap ring two 522 and the snap ring three 531 exert a certain pre-pressure on the elastic element 55.

[0039] Need to be explained, the number of guide rods 52 is multiple, multiple guide rods 52 are distributed in a circular array around the sub-cylinder body 51, the number of elastic elements 55 is multiple, multiple elastic elements 55 are distributed in a circular array and correspondingly sleeved on multiple guide rods 52, and the elastic element 55 can adopt different combination modes according to performance needs.

[0040] In the initial state, the snap ring one 521 and the left end of the push tube 53 are attached to the right end surface of the outer sleeve 3, so that when the outer sleeve and the cylinder body have a relative movement trend, the elastic element 55 can be simultaneously acted on;

[0041] When the bridge is within the design allowable displacement range, the damper does not enter the working state, at this time, the locking portion 1 internal limiting pin 14 can be freely slid in the inverted U-shaped hole of the connecting plate 12 to release the displacement distance, and only the elastic element is in an elastic state;

[0042] When the self-locking hydraulic elastic damper is pressed, the anchorage plate 11 moves to the right, the limiting pin 14 drives the cover plate 13 and the outer sleeve 3 to the right, the right end surface of the outer sleeve 3 pushes the push tube 53, the push tube 53 pushes the elastic element 55 and the snap ring two 522 to the right,

[0043] When the snap ring two 522 moves to the right baffle 56, since the right baffle 56 is fixedly connected with the sub-cylinder body 51 and the right ear portion 7, the snap ring three 531 and the snap ring two 522 are blocked and start to compress the elastic element 55.

[0044] When the self-locking hydraulic elastic damper is pulled, the anchorage plate 11 moves to the left, the limiting pin 14 drives the cover plate 13 and the outer sleeve 3 to the left, the right end surface of the outer sleeve 3 pushes the snap ring one 521 and the guide rod 52, the snap ring two 522 synchronously pushes the elastic element 55 and the snap ring three 531 to the left,

[0045] When the snap ring three 531 moves to the left baffle 54, since the left baffle 54 is fixedly connected with the sub-cylinder body 51 and the cylinder body 42, the snap ring two 522 and the snap ring three 531 are blocked and start to compress the elastic element 55.

[0046] The elastic element 55 is pressed to start to bear the earthquake force and absorb the energy storage, after the load disappears, the elastic potential energy is released, and the damper can recover to the initial state under the action of the elastic element 55.

[0047] When the earthquake occurs, the bridge displacement distance exceeds the design displacement distance, the limiting pin 14 slides to the top of the inverted U-shaped hole of the connecting plate 12, and then falls under the action of gravity, the connecting plate 12, the outer sleeve 3 and the elastic component 5 are released, the locking part 1 enters the locking state, the lower structure displacement is directly transmitted to the left ear part 2, and the damping part 4 starts to work:

[0048] The left ear part 2 drives the piston rod 44 to move, the piston body 441 on the piston rod 44 moves synchronously in the cylinder body 42, the damping medium 47 rapidly flows in the left chamber 45 and the right chamber 46, and the damping medium 47 molecules, the damping medium 47 and the piston body 441 and the damping medium 47 and the cylinder body 42 all generate intense friction, and meanwhile, the damping medium 47 generates great throttling damping when passing through the gap between the piston body 441 and the inner wall of the cylinder body 42, the resultant force generated by the above actions becomes the damping force, converts the mechanical energy transmitted to the piston rod 44 into heat energy (emission), so that the energy is absorbed and the displacement amount is reduced.

[0049] In summary, the self-locking hydraulic elastic damper provided by the application combines the elastic component with the ordinary damper, divides the damper work into two stages, only the elastic component works under the non-earthquake working condition, the damping part does not work, the damper starts to consume energy when the earthquake occurs, the unnecessary structural wear of the damping part is reduced, the service life of the damper is prolonged, the reliability is improved, and the damper can be widely applied to various anti-seismic structure fields.

[0050] The application is not limited to the description and the embodiments described in the specification, and therefore, for those skilled in the art, other advantages and modifications can be easily realized, and therefore, the application is not limited to the specific details, the representative devices and the examples shown and described herein, without departing from the spirit and scope of the general concept defined by the claims and the equivalent range.

Claims

1. A self-locking hydraulic elastic damper, characterized by, The device comprises a locking part (1), a left ear part (2), an outer sleeve (3), a damping part (4), an elastic assembly (5), a tail sleeve (6) and a right ear part (7); the left ear part (2) is hinged to the locking part (1), and the outer sleeve (3) is not connected to the left ear part (2); the damping part (4) comprises a cylinder (42) and a piston rod (44) inserted into the cylinder (42), the outer sleeve (3) is sleeved on the damping part (4), and the outer sleeve (3) is coaxially arranged with the piston rod (44), the elastic assembly (5) is connected to the cylinder (42), and the piston rod (44) is movably inserted into the elastic assembly (5), the tail sleeve (6) is connected to the elastic assembly (5), and the right ear part (7) is connected to the tail sleeve (6); The locking part (1) comprises an anchorage plate (11), a connecting plate (12), a cover plate (13) and a limiting pin (14); the top surface of the anchorage plate (11) is provided with slotted vertical plates, the limiting pin (14) is movably installed in the slots formed by the two slotted vertical plates, and the limiting pin is movable up and down, The connecting plate (12) is connected to the middle of the two vertical plates (10) on the top of the anchorage plate (11), the side surface of the connecting plate (12) is provided with a reverse U-shaped hole, the openings at both ends of the reverse U-shaped hole are downwardly arranged, and the limiting pin (14) falls after sliding to both ends of the reverse U-shaped hole; The cover plate (13) is located on the top of the two vertical plates (10) of the anchorage plate (11) and the connecting plate (12), and the cover plate (13) is provided with a slot corresponding to the slot; The left ear part (2) is hinged to the connecting plate (12) of the locking part (1), and the left ear part (2) is also connected to the piston rod (44); The elastic assembly (5) comprises a secondary cylinder (51), a guide rod (52), a push tube (53), a left baffle (54), an elastic member (55) and a right baffle (56), the secondary cylinder (51) is sleeved on the piston rod (44) and connected to the cylinder (42), the guide rod (52) is inserted through the outer sleeve (3) and the right baffle (56), the guide rod (52) can slide on the outer sleeve (3) and the right baffle (56), the push tube (53) is movably sleeved on the guide rod (52), the push tube (53) and the guide rod (52) can slide relative to each other, the left baffle (54) is fixed outside the secondary cylinder (51) and can slide in cooperation with the push tube (33), the right baffle (56) is fixed outside the secondary cylinder (51) and connected to the tail sleeve (6) and can slide in cooperation with the guide rod (52), the elastic member (55) is sleeved on the guide rod (52), and the right ear part (7) is connected to the secondary cylinder (51). The limiting pin (14) cooperates with the slot, notch and inverted U-shaped hole to divide the damper work into two working stages. When the limiting pin (14) falls after sliding to the two ends of the inverted U-shaped hole of the connecting plate (12), the elastic assembly (55) works, and the damping part (4) does not work. When the limiting pin (14) falls after sliding to the two ends of the inverted U-shaped hole of the connecting plate (12), the elastic assembly (55) does not work, and the damping part (4) works.

2. The self-locking hydraulic elastomeric damper of claim 1, wherein, The damping part (4) further comprises a left end cover (41), a right end cover (43) and a piston body (441). The cylinder body (42) has an inner cavity, the piston rod (44) is movably inserted into the inner cavity, the left end cover (41), the piston body (441) and the right end cover (43) are sequentially sleeved on the piston rod (44) and accommodated in the inner cavity, so as to divide the inner cavity into a left chamber (45) and a right chamber (46), and the left chamber (45) and the right chamber (46) are filled with damping medium (47).

3. The self-locking hydraulic elastomeric damper of claim 1, wherein, The number of the guide rods (52) is multiple, and the multiple guide rods (52) are arranged in a circular array around the auxiliary cylinder body (51). The number of the elastic members (55) is multiple, and the multiple elastic members (55) are arranged in a circular array and correspondingly sleeved on the multiple guide rods (52).

4. The self-locking hydraulic elastomeric damper of claim 1, wherein, The guide rod (52) is further provided with a snap ring one (521) and a snap ring two (522), the snap ring one (521) is located at the left end of the guide rod (52) and extends into the outer sleeve (3), and the snap ring two (522) is located near the right end of the guide rod (52).

5. The self-locking hydraulic elastomeric damper of claim 1, wherein, The push tube (53) is further provided with a snap ring three (531) at the right end, and the elastic member (55) is arranged between the snap ring two (522) and the snap ring three (531).

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