CN111720475B

CN111720475B - Damper

Info

Publication number: CN111720475B
Application number: CN202010592530.5A
Authority: CN
Inventors: 江韩; 杜东升
Original assignee: Nanjing Yangtze River Urban Architectural Design Co Ltd
Current assignee: Nanjing Yangtze River Urban Architectural Design Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-01-12
Anticipated expiration: 2040-06-24
Also published as: CN111720475A

Abstract

The invention relates to the technical field of vibration reduction and energy dissipation, and discloses a damper, which comprises: the inner cavity of the cylinder barrel is filled with viscous liquid; the piston is connected in the cylinder barrel in a sealing and sliding mode and divides an inner cavity of the cylinder barrel into a first cavity and a second cavity, a third cavity and a damping hole are formed in the piston, the damping hole is set to be a curve hole, the third cavity is located in the piston, and the third cavity is communicated between the first cavity and the second cavity through the damping hole; the rotating block is positioned in the third chamber and is rotationally connected to the piston, and the rotating block can rotate under the action of the viscous liquid flowing into the third chamber; and the piston rod is connected to the piston, and two ends of the piston rod extend out of two ends of the cylinder barrel. Through the structure, the damper is large in damping force and high in energy consumption capacity, and can meet the requirement for high-energy-consumption dampers in building engineering.

Description

Damper

Technical Field

The invention relates to the technical field of vibration reduction and energy dissipation, in particular to a damper.

Background

Earthquake disasters have the characteristics of great harm and difficulty in prediction, and once serious earthquakes occur, collapse of buildings is easily caused, so that personnel are buried to cause casualties.

At present, the building earthquake-resistant technology is widely applied and has various forms, and certain guarantee can be provided for the life and property safety of people. In conventional building seismic applications, the incoming seismic energy is consumed primarily by means of hysteretic energy dissipation of the building structure itself, in which method the building structure itself is subject to severe damage. At present, the viscous damper is introduced into the anti-seismic structure of the building as a passive energy dissipation structure,

in the viscous damper, the damping holes are used as key parts for energy consumption, and factors such as size, number and shape of the damping holes become key factors influencing damping force of the viscous damper. At present, damping holes in a common viscous damper are all arranged on a piston, and a damping channel mostly adopts a linear type, so that the damping force provided is small, and the requirement of a high-energy-consumption damper in building engineering cannot be met.

Disclosure of Invention

The invention aims to provide a damper which has large damping force and strong energy consumption capability and can meet the requirement of high-energy-consumption dampers in constructional engineering.

In order to achieve the purpose, the invention adopts the following technical scheme:

a damper, comprising:

the inner cavity of the cylinder barrel is filled with viscous liquid;

the piston is connected in the cylinder barrel in a sealing and sliding mode and divides an inner cavity of the cylinder barrel into a first cavity and a second cavity, a third cavity and a damping hole are formed in the piston, the damping hole is set to be a curve hole, the third cavity is located in the piston, and the third cavity is communicated between the first cavity and the second cavity through the damping hole;

a rotating block located in the third chamber and rotatably connected to the piston, the rotating block being capable of rotating under the action of the viscous liquid flowing into the third chamber;

and the piston rod is connected to the piston, and two ends of the piston rod extend out of two ends of the cylinder barrel.

Preferably, a port of the damping hole communicating with the third chamber is provided toward the rotary block.

Preferably, the damping hole includes a first damping hole and a second damping hole, the first damping hole is communicated between the first chamber and the third chamber, and the second damping hole is communicated between the second chamber and the third chamber.

Preferably, the number of the first damping holes is at least two, the number of the second damping holes is at least two, the at least two first damping holes are uniformly arranged by taking the axis of the piston as the center, and the at least two second damping holes are uniformly arranged by taking the axis of the piston as the center.

Preferably, the two ends of the cylinder barrel are respectively provided with a first sealing end cover and a second sealing end cover in a sealing manner, one end of the piston rod is connected onto the first sealing end cover in a sealing and sliding manner, and the other end of the piston rod is connected onto the second sealing end cover in a sealing and sliding manner.

Preferably, the first sealing end cover and the second sealing end cover are both provided with end cover dynamic sealing rings, and two ends of the piston rod are respectively connected to the first sealing end cover and the second sealing end cover in a sealing and sliding mode through the end cover dynamic sealing rings.

Preferably, the sealing device further comprises a connecting cylinder, the connecting cylinder is connected to the first sealing end cover, and the connecting cylinder is located on one side, away from the cylinder barrel, of the first sealing end cover.

Preferably, a part of circumferential surface of the first end seal cover is connected with the inner surface of the cylinder barrel in a sealing mode, and the other part of circumferential surface of the first end seal cover is connected with the connecting barrel.

Preferably, the piston is sleeved with a piston dynamic sealing ring, the inner diameter surface of the piston dynamic sealing ring is connected to the surface of the piston, and the outer diameter surface of the piston dynamic sealing ring is in sliding contact with the inner surface of the cylinder barrel.

Preferably, the piston is provided with a threaded connection hole, and the piston rod is connected to the piston through the threaded connection hole.

The invention has the beneficial effects that:

the invention provides a damper, which comprises a cylinder barrel, a piston, a rotating block and a piston rod, wherein the piston rod is connected to the piston, the cylinder barrel is filled with viscous liquid, the piston is connected in the cylinder barrel in a sealing and sliding mode and divides an inner cavity of the cylinder barrel into a first cavity and a second cavity, the piston is provided with a damping hole, when the piston rod moves under the action of external force, the piston rod drives the piston to extrude one of the first cavity and the second cavity, so that the viscous liquid flows into the other of the first cavity and the second cavity through the damping hole, damping force is generated at the same time, and energy consumption is carried out on the external force acting on the piston rod.

In addition, the damping hole is provided as a curved hole, which increases the length of the damping hole, so that the resistance to the viscous liquid flowing therethrough is increased, and the damping force generated by the damper is increased. The piston is internally provided with a third chamber which is communicated between the first chamber and the second chamber through a damping hole, and a rotating block capable of rotating is arranged in the third chamber. Through the structure, the damper is large in damping force and high in energy consumption capacity, and can meet the requirement for high-energy-consumption dampers in building engineering.

Drawings

Fig. 1 is a sectional view of a damper provided in an embodiment of the present invention.

In the figure:

1. a cylinder barrel; 11. a first chamber; 12. a second chamber; 2. a piston; 21. a third chamber; 22. a damping hole; 221. a first orifice; 222. a second orifice; 3. rotating the block; 4. a piston rod; 5. a first end seal cap; 6. a second end seal cap; 7. a connecting cylinder.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present embodiment provides a damper, as shown in fig. 1, which includes a cylinder 1, a piston 2 and a piston rod 4, wherein an inner cavity of the cylinder 1 is filled with a viscous liquid, the piston 2 is slidably and sealingly connected in the cylinder 1, and the piston rod 4 is fixedly connected to the piston 2, so that the piston 2 can move along with the movement of the piston rod 4. Preferably, a threaded connection hole is formed in the piston 2, and the piston rod 4 is connected to the piston 2 through the threaded connection hole, so that the connection between the piston 2 and the piston rod 4 is convenient and firm. Specifically, the piston 2 divides the inner cavity of the cylinder 1 into a first chamber 11 and a second chamber 12, the piston 2 is provided with a damping hole 22, and the damping hole 22 is communicated between the first chamber 11 and the second chamber 12, so that the viscous liquid in the first chamber 11 and the viscous liquid in the second chamber 12 can mutually circulate through the damping hole 22.

Preferably, the orifice 22 is provided as a curved orifice which increases the length of the orifice 22 and increases the resistance to the viscous liquid flowing therethrough, thereby increasing the energy consumption of the damper to external forces. It can be understood that the larger the bending angle of the damping hole 22 is, the larger the resistance force applied by the viscous liquid when flowing through the damping hole 22 is, and the larger the energy consumption capability of the damper is, and those skilled in the art can set the bending angle of the damping hole 22 according to actual needs, so that the damping force of the damper can meet the requirements of the constructional engineering on the high energy consumption damper.

When the piston rod 4 is subjected to external acting force, the piston rod 4 drives the piston 2 to move towards one side to extrude one of the first chamber 11 and the second chamber 12, so that the viscous liquid flows to the other one (not extruded) of the first chamber 11 and the second chamber 12 from the extruded chamber through the damping hole 22, and the viscous liquid generates damping force under the action of resistance in the flowing process, and consumes energy of external force acting on the piston rod 4.

In the present embodiment, the piston 2 is provided with the third chamber 21, the third chamber 21 is located in the piston 2, and the third chamber 21 is communicated between the first chamber 11 and the second chamber 12 through the damping hole 22, so that the viscous liquid flows into the third chamber 21 first when flowing between the first chamber 11 and the second chamber 12. Preferably, the damper further comprises a rotating block 3, the rotating block 3 is located in the third chamber 21 and is rotatably connected to the piston 2, the rotating block 3 can rotate at a high speed under the action of the viscous liquid flowing into the third chamber 21, the high-speed rotation of the rotating block 3 enables energy consumption to be increased significantly, and the energy consumption of the damper to external force can be increased significantly. More preferably, the rotating block 3 is a mass block with mass, such as a lead block, which consumes more energy when rotating at high speed, and can further increase the energy consumption of the damper to external force. It will be appreciated that the specific mass of the rotating block 3 can be designed by a person skilled in the art according to the actual circumstances. In the present embodiment, the port of the damping hole 22 communicating with the third chamber 21 is disposed toward the rotating block 3, so that when the viscous liquid flows into the third chamber 21 from the damping hole 22, the viscous liquid can impact the rotating block 3 to rotate, and the energy consumption of the rotation of the rotating block 3 is realized.

In this embodiment, a piston dynamic seal ring is sleeved on the piston 2, an inner diameter surface of the piston dynamic seal ring is fixedly connected to a circumferential surface of the piston 2, and an outer diameter surface of the piston dynamic seal ring is slidably abutted to an inner surface of the cylinder 1, so that the piston 2 is in sealed sliding connection with respect to the cylinder 1.

Preferably, the damping hole 22 includes a first damping hole 221 and a second damping hole 222, the first damping hole 221 is communicated between the first chamber 11 and the third chamber 21, and the second damping hole 222 is communicated between the second chamber 12 and the third chamber 21, so that the third chamber 21 can be communicated with the first chamber 11 and the second chamber 12, so that the viscous liquid in the first chamber 11 and the second chamber 12 can smoothly flow into the third chamber 21. More preferably, the number of the first damping holes 221 is at least two, the number of the second damping holes 222 is at least two, the at least two first damping holes 221 are uniformly arranged around the axis of the piston 2, and the at least two second damping holes 222 are uniformly arranged around the axis of the piston 2, which is beneficial to improving the uniformity of the structural strength of the piston 2.

In this embodiment, the two ends of the cylinder barrel 1 are respectively provided with a first end cover 5 and a second end cover 6 in a sealing manner, the first end cover 5 is provided with a sealing cover in a first chamber 11, the second end cover 6 is provided with a sealing cover in a second chamber 12, one end of the piston rod 4 is connected to the first end cover 5 in a sealing manner in a sliding manner, and the other end of the piston rod 4 is connected to the second end cover 6 in a sealing manner in a sliding manner. Preferably, the first end cover 5 and the second end cover 6 are both provided with end cover dynamic seal rings, and two ends of the piston rod 4 are respectively connected to the first end cover 5 and the second end cover 6 in a sliding manner through the end cover dynamic seal rings, so that smooth sliding of the piston rod 4 and the first end cover 5 and the second end cover 6 can be ensured, and the sealing performance between the piston rod 4 and the first end cover 5 and the second end cover 6 can be ensured.

Preferably, the damper further comprises a connecting cylinder 7, wherein the connecting cylinder 7 is connected to the first end cap 5, and the connecting cylinder 7 is positioned on one side of the first end cap 5 away from the cylinder barrel 1, so that the damper is conveniently connected with an external component through the connecting cylinder 7. Specifically, a part of the circumferential surface of the first end cap 5 is sealingly connected to the inner surface of the cylinder tube 1, and another part of the circumferential surface of the first end cap 5 is fixedly connected to the connecting tube 7, so that the connecting tube 7 can be connected to one end of the cylinder tube 1.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A damper, comprising:

the cylinder barrel (1), the cavity of the cylinder barrel (1) is filled with viscous liquid;

the piston (2) is connected in the cylinder barrel (1) in a sealing and sliding mode and divides an inner cavity of the cylinder barrel (1) into a first chamber (11) and a second chamber (12), a third chamber (21) and a damping hole (22) are arranged on the piston (2), the damping hole (22) is set to be a curve hole, the third chamber (21) is located in the piston (2), and the third chamber (21) is communicated between the first chamber (11) and the second chamber (12) through the damping hole (22);

a rotating block (3), said rotating block (3) being located in said third chamber (21) and being rotatably connected to said piston (2), said rotating block (3) being able to rotate under the action of said viscous liquid flowing into said third chamber (21);

the piston rod (4), the piston rod (4) connect in on the piston (2), the both ends of piston rod (4) are followed the both ends of cylinder barrel (1) are stretched out.

2. A damper according to claim 1, characterized in that the port of the damping orifice (22) communicating with the third chamber (21) is arranged towards the rotating block (3).

3. The damper according to claim 1, wherein the damping hole (22) comprises a first damping hole (221) and a second damping hole (222), the first damping hole (221) communicating between the first chamber (11) and the third chamber (21), the second damping hole (222) communicating between the second chamber (12) and the third chamber (21).

4. A damper according to claim 3, wherein said first damping holes (221) are provided in at least two, said second damping holes (222) are provided in at least two, at least two of said first damping holes (221) are uniformly arranged centering on the axis of said piston (2), and at least two of said second damping holes (222) are uniformly arranged centering on the axis of said piston (2).

5. The damper according to claim 1, wherein the two ends of the cylinder (1) are respectively sealed and provided with a first sealing end cover (5) and a second sealing end cover (6), one end of the piston rod (4) is hermetically and slidably connected to the first sealing end cover (5), and the other end of the piston rod (4) is hermetically and slidably connected to the second sealing end cover (6).

6. The damper according to claim 5, wherein the first end cover (5) and the second end cover (6) are provided with end cover dynamic seal rings, and two ends of the piston rod (4) are respectively connected to the first end cover (5) and the second end cover (6) in a sliding manner through the end cover dynamic seal rings in a sealing manner.

7. The damper according to claim 5, characterized by further comprising a connecting cylinder (7), wherein the connecting cylinder (7) is connected to the first end cap (5), and the connecting cylinder (7) is located on the side of the first end cap (5) away from the cylinder (1).

8. A damper according to claim 7, characterized in that a part of the circumferential surface of the first end seal cover (5) is sealingly connected to the inner surface of the cylinder tube (1), and another part of the circumferential surface of the first end seal cover (5) is connected to the connecting cylinder (7).

9. The damper according to claim 1, characterized in that the piston (2) is sleeved with a piston dynamic seal ring, the inner diameter surface of the piston dynamic seal ring is connected to the surface of the piston (2), and the outer diameter surface of the piston dynamic seal ring is slidably abutted against the inner surface of the cylinder (1).

10. Damper according to claim 1, characterized in that the piston (2) is provided with a threaded connection hole, through which the piston rod (4) is connected to the piston (2).