A viscous damper with large axial limiting force and its installation method

Abstract

The present application discloses a viscous damper with a large axial limiting force and an installation method thereof, which relates to the technical field of bridge seismic resistance, including: the viscous damper also includes a limiting device, which includes: a first supporting steel ring, which is sleeved and fixed on the left end of the cylinder; a reaction cylinder, the outer cylindrical surface of the first supporting steel ring fits the inner cylindrical surface of the reaction cylinder; the left end of the reaction cylinder is fixed to the left ear through a connecting assembly; the right port of the reaction cylinder has a circular sealing plate, and the cylinder penetrates the circular sealing plate; when the piston moves to the left to fit the inner surface of the end cover on the left side of the cylinder, the first supporting steel ring limits the circular sealing plate of the reaction cylinder to move to the left; when the piston moves to the right to fit the inner surface of the end cover on the right side of the cylinder, the end cover on the left side of the cylinder limits the left ear column of the left ear to move to the right. The viscous damper and the installation method of the present application meet the requirements of matching small-tonnage damping force with large-tonnage limiting force through a limiting device with a specific structure.

Description

Technical Field

[0001] The present application relates to the technical field of bridge seismic resistance, and in particular to a viscous damper with large axial limiting force and an installation method thereof. Background Art

[0002] At present, viscous dampers are widely used in bridge seismic structures as a passive seismic device with simple structure, good seismic effect, low cost and long service life. Viscous dampers are mainly composed of pistons, piston rods, silicone oil, cylinders and left and right ears. The piston reciprocates in the silicone oil inside the cylinder to generate damping force for energy consumption, thereby achieving the effect of vibration reduction and seismic resistance.

[0003] The current bridge construction in my country has developed in the direction of cross-sea bridges, which indicate higher and stronger requirements for my country's bridge construction. As a safety guarantee for bridge construction, while the viscous damper meets the damping mechanical properties, the cross-sea bridge also puts forward new requirements for the damper, that is, it needs to have a limit function. The viscous damper currently used is a speed type. Generally, when the damper moves slowly (temperature changes or vehicle actuation, etc.), the actual damping force is not greater than 10% of the design damping force; if the slow movement stroke of the structure exceeds the design displacement, the damper structure will be damaged. The viscous damper needs to have a limit function, generating a limit force when it exceeds the design displacement to protect the damper structure from damage due to large deformation.

[0004] In the design process of related dampers, due to the external force environment of the damper, it is often required that the damper's small tonnage damping force matches the large tonnage limit force, which brings great difficulties to the design of the damper. If the conventional design method of small tonnage damping force is used, the structure of the entire damper cannot meet the large tonnage limit force under the limit state. If the damper is designed according to the structure under the large tonnage limit force state, it will cause a great waste of damper materials and fail to meet the requirements of structural lightweight.

[0005] In the prior art, the limiting device of the damper usually uses a rigid limiting device such as a disc spring or a flexible limiting device such as a rubber elastomer. However, when using a rigid limiting device such as a disc spring, compared with a rubber elastomer structure, when the same limiting force is satisfied, the disc spring is larger in size and needs to be stacked in multiple pieces. When there are extremely high requirements for the installation space of the damper, the volume of the damper is increased and the performance of other aspects of the damper is reduced. When using a flexible limiting device such as a rubber elastomer, the viscous damper often installs the limiting device on the piston rod. During operation, the piston rod of the damper is subjected to the limiting force, which greatly increases the requirements for the performance of the piston rod itself (strength and stiffness, etc.) and greatly increases the production cost. Summary of the invention

[0006] In view of the defects existing in the prior art, the purpose of this application is to provide a viscous damper with a large axial limiting force and an installation method thereof. Through a limiting device with a specific structure, the structural dimensions of the damper are reduced, and the requirements of matching small-tonnage damping force with large-tonnage limiting force are met.

[0007] In order to achieve the above purpose, the technical solution adopted is: a viscous damper with a large axial limiting force, comprising a left ear, a cylinder, a right ear, a piston and a piston rod, the left ear is fixed to the end of the piston rod, the right ear is fixed to the cylinder, the viscous damper also includes a limiting device, the limiting device includes:

[0008] The first supporting steel ring is sleeved and fixed on the left end of the cylinder;

[0009] A reaction cylinder is coaxially arranged outside the cylinder, and the inner diameter of the reaction cylinder is larger than the outer diameter of the cylinder; the outer circumferential surface of the first supporting steel ring fits the inner circumferential surface of the reaction cylinder; the left end of the reaction cylinder is fixed to the left ear through a connecting assembly; the right end of the reaction cylinder has a circular sealing plate, and the cylinder penetrates the circular sealing plate;

[0010] When the piston moves to the left and fits the inner surface of the end cover on the left side of the cylinder, the first support steel ring restricts the circular sealing plate of the reaction cylinder from moving to the left; when the piston moves to the right and fits the inner surface of the end cover on the right side of the cylinder, the end cover on the left side of the cylinder restricts the left ear column of the left ear from moving to the right.

[0011] On the basis of the above technical solution, the limiting device further comprises a first rubber elastic body, the first rubber elastic body is fixed to the outer surface of the end cover on the left side of the cylinder, and the piston rod passes through the first rubber elastic body;

[0012] When the piston moves rightward to the inner surface of the end cover adjacent to the right side of the cylinder, the first rubber elastic body restricts the left ear from moving rightward.

[0013] On the basis of the above technical solution, the connection component that fixes the left end of the reaction cylinder and the left ear includes an anti-collision steel plate, a second rubber elastic body and a second supporting steel ring. The anti-collision steel plate is fixed to the left port of the reaction cylinder, and the second supporting steel ring is sleeved and fixed to the right end of the left ear column of the left ear, and the outer circular surface of the second supporting steel ring fits the inner circular surface of the reaction cylinder; the second rubber elastic body is arranged between the anti-collision steel plate and the second supporting steel ring; the left ear column penetrates the anti-collision steel plate and the second rubber elastic body.

[0014] On the basis of the above technical solution, guide belts are provided on the contact surface between the circular sealing plate of the reaction cylinder and the cylinder, the outer circumferential surface of the first supporting steel ring and the outer circumferential surface of the second supporting steel ring.

[0015] Based on the above technical solution, the axial length of the left ear column of the left ear is divided into three equal parts, and the thickness of the second supporting steel ring, the second rubber elastic body and the anti-collision steel plate are all equal to the length of one of the parts.

[0016] The present application also discloses an installation method based on the above-mentioned viscous damper, comprising the following steps: a first supporting steel ring is sleeved and fixed on the left end of the cylinder;

[0017] The cylinder, piston, piston rod and end covers on the left and right sides of the cylinder are assembled, and damping medium is injected into the cylinder;

[0018] The reaction cylinder is inserted from the right side to the left side of the cylinder, the circular sealing plate of the reaction cylinder slides along the outer circumference of the cylinder, and the first supporting steel ring is supported on the inner circumference of the reaction cylinder;

[0019] The right ear is installed and fixed to the cylinder barrel; the left ear column of the left ear is fixed to the left end of the piston rod;

[0020] The left end of the reaction cylinder is fixed to the left ear column through a connecting component.

[0021] On the basis of the above technical solution, the limiting device further comprises a first rubber elastic body, the first rubber elastic body is fitted and fixed to the outer surface of the end cover on the left side of the cylinder, and the piston rod passes through the first rubber elastic body;

[0022] When the piston moves rightward to the inner surface of the end cover adjacent to the right side of the cylinder, the first rubber elastic body restricts the left ear from moving rightward.

[0023] On the basis of the above technical solution, the connection component that fixes the left end of the reaction cylinder and the left ear includes an anti-collision steel plate, a second rubber elastic body and a second supporting steel ring. The anti-collision steel plate is fixed to the left port of the reaction cylinder, and the second supporting steel ring is sleeved and fixed to the right end of the left ear column of the left ear, and the outer circular surface of the second supporting steel ring fits the inner circular surface of the reaction cylinder; the second rubber elastic body is arranged between the anti-collision steel plate and the second supporting steel ring; the left ear column penetrates the anti-collision steel plate and the second rubber elastic body.

[0024] On the basis of the above technical solution, guide belts are provided on the contact surface between the circular sealing plate of the reaction cylinder and the cylinder, the outer circumferential surface of the first supporting steel ring and the outer circumferential surface of the second supporting steel ring.

[0025] Based on the above technical solution, the axial length of the left ear column of the left ear is divided into three equal parts, and the thickness of the second supporting steel ring, the second rubber elastic body and the anti-collision steel plate are all equal to the length of one of the parts.

[0026] The beneficial effects of the technical solution provided by this application include:

[0027] The present application discloses a viscous damper with a large axial limiting force, which can meet relevant requirements by only adding a limiting device and adjusting the sizes of the left ear and the right ear, without changing the structure (such as the cylinder, the end cover, the piston rod, and the related seals) and the size of the conventional damper. This can prevent the piston rod from being subjected to the corresponding limiting force, so that the damping force and the limiting force no longer cross-influence each other but are independent of each other. The design of the piston rod only needs to consider the damping force, while the limiting force is mainly achieved through the limiting device, which greatly saves the design and manufacturing costs and reduces the design difficulty. Compared with the traditional technical solution, the structural size of the damper is reduced, and the requirement of matching the small-tonnage damping force with the large-tonnage limiting force is met.

[0028] The viscous damper of the present application limits the extreme position of the leftward movement of the piston by matching the reaction cylinder of the limiting device and the first supporting steel ring, and the reaction cylinder and the first supporting steel ring are easy to adjust in thickness and material, and can provide a large limiting force; by adjusting the sizes of the piston rod, the cylinder and the left ear, the end cover on the left side of the cylinder limits the left ear column of the left ear to move to the right, the structural change is small, and the design is ingenious; and at the left limit of the piston movement, the main body bearing the limiting force is the reaction cylinder; at the right limit of the piston movement, the main body bearing the limiting force is the cylinder, the reaction cylinder and the cylinder are large in size, and the thickness and material are easy to adjust, which is easy to meet the design requirements of large limiting force, and the reaction cylinder and the limiting force borne by the cylinder are finally transmitted to the main beam or main tower to disperse the force, thereby protecting the main structures on both sides of the damper from damage, and also protecting the structure of the viscous damper itself from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of a viscous damper with a large axial limiting force provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of the limiting device provided in the embodiment of the present application;

[0032] Figure numerals: 1, left ear; 11, left ear column; 2, cylinder; 3, damping medium; 4, right ear; 41, right ear tube; 5, piston rod; 6, piston; 7, limit device; 8, end cover; 701, reaction cylinder; 702, first supporting steel ring; 703, first rubber elastic body; 704, second supporting steel ring; 705, anti-collision steel plate; 706, screw; 707, guide belt; 708, second rubber elastic body. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 and Figure 2 As shown, the present application discloses an embodiment of a viscous damper with a large axial limiting force, comprising a left ear portion 1, a cylinder barrel 2, a damping medium 3, a right ear portion 4, a piston rod 5 and a piston 6, wherein the left and right ends of the cylinder barrel 2 are both sealed and fixed by end covers 8. The two ends of the piston rod 5 penetrate the end covers 8 at the left and right ends of the cylinder barrel 2, respectively. The left ear portion 1 is fixed to the left end of the piston rod 5, and the right ear portion 4 is fixed to the cylinder barrel 2, forming a damper structure. Specifically, the right ear portion 4 comprises an ear plate body and a right ear tube 41, and the right ear tube 41 is located on the left side of the ear plate body. The axis of the right ear tube 41 is coaxial with the axis of the cylinder barrel 2, a part of the right ear tube 41 is sleeved and fixed on the right end of the cylinder barrel 2, and the rest of the right ear tube 41 and the cylinder barrel 2 form a right side active cavity of the piston rod 5, providing a movement space for the piston rod 5.

[0035] Furthermore, the cylinder 2 is divided into two chambers by the piston 6, and the two chambers are filled with the damping medium 3. The piston 6 has a damping hole that runs through the left and right chambers. When the relative movement of the left ear 1 and the right ear 4 is slow, the damping medium 3 flows from one chamber to another through the damping hole, and the piston 6 moves slowly in the cylinder 2, and the damping medium 3 provides almost no damping force. When the relative movement of the left ear 1 and the right ear 4 is fast, the piston 6 tends to move quickly in the cylinder 2, and the damping medium 3 does not have time to flow from one chamber to another through the damping hole. The piston 6 is subjected to the damping force of the damping medium 3, which slows down the relative movement of the left ear 1 and the right ear 4.

[0036] The viscous damper with large axial limiting force of the present application also includes a limiting device 7. The limiting device 7 includes a first supporting steel ring 702 and a reaction cylinder 701. The first supporting steel ring 702 is sleeved and fixed on the left end of the cylinder 2, and the axis of the first supporting steel ring 702 is coaxial with the axis of the cylinder 2. The first supporting steel ring 702 plays the role of supporting the reaction cylinder 701 and also plays the role of limiting.

[0037] The reaction cylinder 701 is coaxially arranged outside the cylinder 2, and the inner diameter of the reaction cylinder 701 is larger than the outer diameter of the cylinder 2, that is, there is a certain gap between the inner circular surface of the reaction cylinder 701 and the outer circular surface of the cylinder 2. The outer circular surface of the first supporting steel ring 702 fits the inner circular surface of the reaction cylinder 701, and is used to support the reaction cylinder 701. The left end of the reaction cylinder 701 is fixed to the left ear 1 through a connecting assembly. The right port of the reaction cylinder 701 has a circular sealing plate, and the cylinder 2 can slidably penetrate the circular sealing plate. When the left ear 1 moves relative to the right ear 4, the reaction cylinder 701 moves with the left ear 1, and the circular sealing plate slides on the outer surface of the cylinder 2, and the circular sealing plate is restricted by the first supporting steel ring 702.

[0038] During the actual operation of the viscous damper, the piston 6 moves slowly and is subjected to a small damping force. When the piston 6 moves to the left to fit the inner surface of the end cover 8 on the left side of the cylinder 2, the right end surface of the first support steel ring 702 fits the circular sealing plate of the reaction cylinder 701, and the first support steel ring 702 restricts the circular sealing plate of the reaction cylinder 701 from moving to the left. When the piston 6 moves to the right to fit the inner surface of the end cover 8 on the right side of the cylinder 2, the end cover 8 on the left side of the cylinder 2 restricts the left ear column 11 of the left ear 1 from moving to the right.

[0039] The viscous damper of the present application can meet relevant requirements by only adding a limit device 7 and adjusting the sizes of the left ear and the right ear, without changing the structure (such as the cylinder, end cover, piston rod, and related seals) and dimensions of the conventional damper. It can avoid the piston rod from being subjected to the corresponding limit force, so that the damping force and the limit force no longer cross-influence each other but are independent of each other. The design of the piston rod only needs to consider the damping force, and the limit force is mainly achieved through the limit device 7, which greatly saves the design and manufacturing costs and reduces the design difficulty.

[0040] The viscous damper of the present application limits the extreme position of the leftward movement of the piston by matching the reaction cylinder 701 and the first supporting steel ring 702 of the limiting device, and the reaction cylinder 701 and the first supporting steel ring 702 are easy to adjust the thickness and material, and can provide a large limiting force; by adjusting the size of the piston rod, the cylinder 2 and the left ear, the end cover 8 on the left side of the cylinder 2 limits the left ear column 11 of the left ear 1 to move to the right, the structural change is small, and the design is ingenious; and at the left limit of the piston movement, the main body bearing the limiting force is the reaction cylinder 701; at the right limit of the piston movement, the main body bearing the limiting force is the cylinder 2, the reaction cylinder 701 and the cylinder 2 are large in size, and the thickness and material are easy to adjust, which is easy to meet the design requirements of large limiting force, and the limiting force borne by the reaction cylinder 701 and the cylinder 2 is finally transmitted to the main beam or the main tower to disperse the force, protecting the main structures on both sides of the damper from damage, and also protecting the structure of the viscous damper itself from damage.

[0041] In one embodiment, the limiting device 7 further includes a first rubber elastic body 703, which is fitted and fixed to the outer surface of the end cover 8 on the left side of the cylinder barrel 2, and the piston rod 5 passes through the first rubber elastic body 703. When the piston 6 moves rightward to the inner surface of the end cover 8 adjacent to the right side of the cylinder barrel 2, the first rubber elastic body 703 limits the left ear portion 1 from moving rightward. The first rubber elastic body 703 of the present application, on the basis of satisfying the limiting force of the right limit of the piston 6, further provides a buffering force to the left ear column 11 and the cylinder barrel 2, thereby avoiding a violent collision between the left ear column 11 and the end cover 8 on the left side of the cylinder barrel 2, and improving the safety performance.

[0042] In one embodiment, the connection assembly for fixing the left end of the reaction cylinder 701 to the left ear 1 includes an anti-collision steel plate 705, a second rubber elastic body 708, and a second support steel ring 704. The anti-collision steel plate 705 is fixed to the left port of the reaction cylinder 701, and the second support steel ring 704 is sleeved and fixed to the right end of the left ear column 11 of the left ear 1, and the outer circumferential surface of the second support steel ring 704 fits the inner circumferential surface of the reaction cylinder 701. The second support steel ring 704 is fixed to the left ear column 11 as a whole, and the second support steel ring 704 is used to support the reaction cylinder 701. The second rubber elastic body 708 is arranged between the anti-collision steel plate 705 and the second support steel ring 704; the left ear column 11 penetrates the anti-collision steel plate 705 and the second rubber elastic body 708. Specifically, the anti-collision steel plate 705 and the second rubber elastic body 708 are equivalent to being movably sleeved on the left ear column 11, and the second support steel ring 704 is fixedly sleeved on the left ear column 11. When the left ear 1 moves to the right, the reaction cylinder 701 moves to the right; when the left ear 1 moves to the left, the second supporting steel ring 704 is buffered by the second rubber elastic body 708, and squeezes and pushes the anti-collision steel plate 705 to the left, and the reaction cylinder 701 moves to the left.

[0043] The connection assembly of the present application, specifically through the anti-collision steel plate 705, the second rubber elastic body 708 and the second supporting steel ring 704, movably and fixedly connects the reaction cylinder 701 and the left ear 1, has a stronger load-bearing effect and is more suitable for large limiting forces compared to the rigid fixing method.

[0044] Preferably, the cross-sections of the first support steel ring 702 and the second support steel ring 704 are both rectangular. Preferably, the anti-collision steel plate 705 is fixed to the left port of the reaction cylinder 701 by screws 706 .

[0045] In one embodiment, the contact surface between the circular sealing plate of the reaction cylinder 701 and the cylinder 2, the outer circumferential surface of the first support steel ring 702 and the outer circumferential surface of the second support steel ring 704 are all provided with guide belts 707. The guide belts 707 of the present application enhance the sliding performance and avoid rigid friction on the contact surface.

[0046] In one embodiment, the axial length of the left ear column 11 of the left ear portion 1 is divided into three equal parts, and the thicknesses of the second supporting steel ring 704, the second rubber elastic body 708 and the anti-collision steel plate 705 are all equal to the length of one of the parts.

[0047] Preferably, the left ear column 11 of the left ear portion 1 is provided with an internal threaded hole, the left end of the piston rod 5 is provided with an external thread, and the piston rod 5 and the left ear column 11 are matched with each other through threads.

[0048] The present application also discloses an installation method based on the above-mentioned viscous damper, comprising the following steps:

[0049] The first support steel ring 702 is sleeved and fixed on the left end of the cylinder 2 to provide a support basis and a limiting basis;

[0050] The cylinder 2, the piston 6, the piston rod 5 and the end covers 8 on the left and right sides of the cylinder 2 are conventionally assembled in the same way as a conventional damper, and the damping medium 3 is injected into the cylinder 2 to form the basic structure of the damper.

[0051] The reaction cylinder 701 is inserted from the right side to the left side of the cylinder 2, the circular sealing plate of the reaction cylinder 701 slides along the outer surface of the cylinder 2, and the first supporting steel ring 702 is supported on the inner surface of the reaction cylinder 701;

[0052] The right ear part 4 is fixed to the cylinder 2; a right movable cavity is formed between the right ear tube 41 and the cylinder 2. The left ear column 11 of the left ear part 1 is fixed to the left end of the piston rod 5;

[0053] The left end of the reaction cylinder 701 is fixed to the left ear column 11 through a connecting assembly.

[0054] The viscous damper of the present application is efficient and convenient to install, and only requires the installation of the limit device 7 during the conventional damper assembly process; and the limit device 7 has little impact on the installation of the remaining damper structure.

[0055] In one embodiment, the limiting device 7 further includes a first rubber elastic body 703, which is fitted and fixed to the outer surface of the end cover 8 on the left side of the cylinder barrel 2, and the piston rod 5 passes through the first rubber elastic body 703. When the piston 6 moves rightward to the inner surface of the end cover 8 adjacent to the right side of the cylinder barrel 2, the first rubber elastic body 703 limits the left ear portion 1 from moving rightward. The first rubber elastic body 703 of the present application, on the basis of satisfying the limiting force of the right limit of the piston 6, further provides a buffering force to the left ear column 11 and the cylinder barrel 2, thereby avoiding a violent collision between the left ear column 11 and the end cover 8 on the left side of the cylinder barrel 2, and improving the safety performance.

[0056] In one embodiment, the connection assembly for fixing the left end of the reaction cylinder 701 to the left ear 1 includes an anti-collision steel plate 705, a second rubber elastic body 708, and a second support steel ring 704. The anti-collision steel plate 705 is fixed to the left port of the reaction cylinder 701, and the second support steel ring 704 is sleeved and fixed to the right end of the left ear column 11 of the left ear 1, and the outer circumferential surface of the second support steel ring 704 fits the inner circumferential surface of the reaction cylinder 701. The second support steel ring 704 is fixed to the left ear column 11 as a whole, and the second support steel ring 704 is used to support the reaction cylinder 701. The second rubber elastic body 708 is arranged between the anti-collision steel plate 705 and the second support steel ring 704; the left ear column 11 penetrates the anti-collision steel plate 705 and the second rubber elastic body 708. Specifically, the anti-collision steel plate 705 and the second rubber elastic body 708 are equivalent to being movably sleeved on the left ear column 11, and the second support steel ring 704 is fixedly sleeved on the left ear column 11. When the left ear 1 moves to the right, the reaction cylinder 701 moves to the right; when the left ear 1 moves to the left, the second supporting steel ring 704 is buffered by the second rubber elastic body 708, and squeezes and pushes the anti-collision steel plate 705 to the left, and the reaction cylinder 701 moves to the left.

[0057] The connection assembly of the present application, specifically through the anti-collision steel plate 705, the second rubber elastic body 708 and the second supporting steel ring 704, movably and fixedly connects the reaction cylinder 701 and the left ear 1, has a stronger load-bearing effect and is more suitable for large limiting forces compared to the rigid fixing method.

[0058] Preferably, the cross-sections of the first support steel ring 702 and the second support steel ring 704 are both rectangular. Preferably, the anti-collision steel plate 705 is fixed to the left port of the reaction cylinder 701 by screws 706 .

[0059] In one embodiment, the contact surface between the circular sealing plate of the reaction cylinder 701 and the cylinder 2, the outer circumferential surface of the first support steel ring 702 and the outer circumferential surface of the second support steel ring 704 are all provided with guide belts 707. The guide belts 707 of the present application enhance the sliding performance and avoid rigid friction on the contact surface.

[0060] In one embodiment, the axial length of the left ear column 11 of the left ear portion 1 is divided into three equal parts, and the thicknesses of the second supporting steel ring 704, the second rubber elastic body 708 and the anti-collision steel plate 705 are all equal to the length of one of the parts.

[0061] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0062] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A viscous damper with a large axial limiting force, comprising a left ear (1), a cylinder (2), a right ear (4), a piston (6) and a piston rod (5), wherein the left ear (1) is fixed to the end of the piston rod (5), and the right ear (4) is fixed to the cylinder (2), characterized in that: The viscous damper further comprises a limiting device (7), wherein the limiting device (7) comprises: A first supporting steel ring (702) is sleeved and fixed on the left end of the cylinder (2); A reaction cylinder (701) is coaxially arranged outside the cylinder (2), and the inner diameter of the reaction cylinder (701) is larger than the outer diameter of the cylinder (2); the outer circumferential surface of the first supporting steel ring (702) fits the inner circumferential surface of the reaction cylinder (701); the left end of the reaction cylinder (701) is fixed to the left ear (1) through a connecting assembly; the right end of the reaction cylinder (701) has a circular sealing plate, and the cylinder (2) penetrates the circular sealing plate; When the piston (6) moves to the left until it fits against the inner surface of the end cover (8) on the left side of the cylinder barrel (2), the first supporting steel ring (702) restricts the circular sealing plate of the reaction cylinder barrel (701) from moving to the left; when the piston (6) moves to the right until it fits against the inner surface of the end cover (8) on the right side of the cylinder barrel (2), the end cover (8) on the left side of the cylinder barrel (2) restricts the left ear column (11) of the left ear portion (1) from moving to the right; The limiting device (7) further comprises a first rubber elastic body (703), wherein the first rubber elastic body (703) is fixedly attached to the outer surface of the end cover (8) on the left side of the cylinder barrel (2), and the piston rod (5) passes through the first rubber elastic body (703); When the piston (6) moves rightward to the inner surface of the end cover (8) adjacent to the right side of the cylinder barrel (2), the first rubber elastic body (703) restricts the left ear portion (1) from moving rightward; The connection assembly comprises an anti-collision steel plate (705), a second rubber elastic body (708) and a second supporting steel ring (704); the anti-collision steel plate (705) is fixed to the left port of the reaction cylinder (701); the second supporting steel ring (704) is sleeved and fixed to the right end of the left ear column (11) of the left ear portion (1), and the outer circumferential surface of the second supporting steel ring (704) fits the inner circumferential surface of the reaction cylinder (701); the second rubber elastic body (708) is arranged between the anti-collision steel plate (705) and the second supporting steel ring (704); and the left ear column (11) penetrates the anti-collision steel plate (705) and the second rubber elastic body (708).

2. A viscous damper with large axial limiting force as claimed in claim 1, characterized in that: The contact surface between the circular sealing plate of the reaction cylinder (701) and the cylinder (2), the outer circumferential surface of the first supporting steel ring (702) and the outer circumferential surface of the second supporting steel ring (704) are all provided with a guide belt (707).

3. A viscous damper with large axial limiting force as claimed in claim 1, characterized in that: The axial length of the left ear column (11) of the left ear portion (1) is divided into three equal parts, and the thickness of the second supporting steel ring (704), the second rubber elastic body (708) and the anti-collision steel plate (705) are all equal to the length of one of the parts.

4. A method for installing the viscous damper according to claim 1, characterized in that: The following steps are involved: The first supporting steel ring (702) is sleeved and fixed on the left end of the cylinder barrel (2); The cylinder barrel (2), the piston (6), the piston rod (5) and the end covers (8) on the left and right sides of the cylinder barrel (2) are assembled, and the damping medium (3) is injected into the cylinder barrel (2); The reaction cylinder (701) is inserted from the right side to the left side of the cylinder (2), the circular sealing plate of the reaction cylinder (701) slides along the outer circular surface of the cylinder (2), and the first supporting steel ring (702) is supported on the inner circular surface of the reaction cylinder (701); The right ear portion (4) is installed and fixed to the cylinder barrel (2); the left ear column (11) of the left ear portion (1) is fixed to the left end of the piston rod (5); The left end of the reaction cylinder (701) is fixed to the left ear column (11) through a connecting assembly; The connection assembly for fixing the left end of the reaction cylinder (701) to the left ear (1) comprises an anti-collision steel plate (705), a second rubber elastic body (708) and a second supporting steel ring (704); the anti-collision steel plate (705) is fixed to the left port of the reaction cylinder (701); the second supporting steel ring (704) is sleeved and fixed to the right end of the left ear column (11) of the left ear (1), and the outer circumferential surface of the second supporting steel ring (704) fits the inner circumferential surface of the reaction cylinder (701); the second rubber elastic body (708) is arranged between the anti-collision steel plate (705) and the second supporting steel ring (704); and the left ear column (11) penetrates the anti-collision steel plate (705) and the second rubber elastic body (708).

5. The method for installing a viscous damper according to claim 4, characterized in that: The limiting device (7) further comprises a first rubber elastic body (703), wherein the first rubber elastic body (703) is fixedly attached to the outer surface of the end cover (8) on the left side of the cylinder barrel (2), and the piston rod (5) passes through the first rubber elastic body (703); When the piston (6) moves rightwards to the inner surface of the end cover (8) adjacent to the right side of the cylinder (2), the first rubber elastic body (703) restricts the left ear (1) from moving rightwards.

6. The method for installing a viscous damper according to claim 4, characterized in that: The contact surface between the circular sealing plate of the reaction cylinder (701) and the cylinder (2), the outer circumferential surface of the first supporting steel ring (702) and the outer circumferential surface of the second supporting steel ring (704) are all provided with a guide belt (707).

7. The method for installing a viscous damper according to claim 4, characterized in that: The axial length of the left ear column (11) of the left ear portion (1) is divided into three equal parts, and the thickness of the second supporting steel ring (704), the second rubber elastic body (708) and the anti-collision steel plate (705) are all equal to the length of one of the parts.

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